nfs_vnops.c revision 1.163
1 /* $NetBSD: nfs_vnops.c,v 1.163 2003/04/09 14:22:33 yamt 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 1.163 2003/04/09 14:22:33 yamt 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; 287 288 nfsm_reqhead(vp, NFSPROC_NULL, 0); 289 nfsm_request(vp, NFSPROC_NULL, procp, cred); 290 nfsm_reqdone; 291 return (error); 292 } 293 294 /* 295 * nfs access vnode op. 296 * For nfs version 2, just return ok. File accesses may fail later. 297 * For nfs version 3, use the access rpc to check accessibility. If file modes 298 * are changed on the server, accesses might still fail later. 299 */ 300 int 301 nfs_access(v) 302 void *v; 303 { 304 struct vop_access_args /* { 305 struct vnode *a_vp; 306 int a_mode; 307 struct ucred *a_cred; 308 struct proc *a_p; 309 } */ *ap = v; 310 struct vnode *vp = ap->a_vp; 311 u_int32_t *tl; 312 caddr_t cp; 313 int32_t t1, t2; 314 caddr_t bpos, dpos, cp2; 315 int error = 0, attrflag, cachevalid; 316 struct mbuf *mreq, *mrep, *md, *mb; 317 u_int32_t mode, rmode; 318 const int v3 = NFS_ISV3(vp); 319 struct nfsnode *np = VTONFS(vp); 320 321 cachevalid = (np->n_accstamp != -1 && 322 (time.tv_sec - np->n_accstamp) < NFS_ATTRTIMEO(np) && 323 np->n_accuid == ap->a_cred->cr_uid); 324 325 /* 326 * Check access cache first. If this request has been made for this 327 * uid shortly before, use the cached result. 328 */ 329 if (cachevalid) { 330 if (!np->n_accerror) { 331 if ((np->n_accmode & ap->a_mode) == ap->a_mode) 332 return np->n_accerror; 333 } else if ((np->n_accmode & ap->a_mode) == np->n_accmode) 334 return np->n_accerror; 335 } 336 337 /* 338 * For nfs v3, do an access rpc, otherwise you are stuck emulating 339 * ufs_access() locally using the vattr. This may not be correct, 340 * since the server may apply other access criteria such as 341 * client uid-->server uid mapping that we do not know about, but 342 * this is better than just returning anything that is lying about 343 * in the cache. 344 */ 345 if (v3) { 346 nfsstats.rpccnt[NFSPROC_ACCESS]++; 347 nfsm_reqhead(vp, NFSPROC_ACCESS, NFSX_FH(v3) + NFSX_UNSIGNED); 348 nfsm_fhtom(vp, v3); 349 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); 350 if (ap->a_mode & VREAD) 351 mode = NFSV3ACCESS_READ; 352 else 353 mode = 0; 354 if (vp->v_type != VDIR) { 355 if (ap->a_mode & VWRITE) 356 mode |= (NFSV3ACCESS_MODIFY | NFSV3ACCESS_EXTEND); 357 if (ap->a_mode & VEXEC) 358 mode |= NFSV3ACCESS_EXECUTE; 359 } else { 360 if (ap->a_mode & VWRITE) 361 mode |= (NFSV3ACCESS_MODIFY | NFSV3ACCESS_EXTEND | 362 NFSV3ACCESS_DELETE); 363 if (ap->a_mode & VEXEC) 364 mode |= NFSV3ACCESS_LOOKUP; 365 } 366 *tl = txdr_unsigned(mode); 367 nfsm_request(vp, NFSPROC_ACCESS, ap->a_p, ap->a_cred); 368 nfsm_postop_attr(vp, attrflag, 0); 369 if (!error) { 370 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 371 rmode = fxdr_unsigned(u_int32_t, *tl); 372 /* 373 * The NFS V3 spec does not clarify whether or not 374 * the returned access bits can be a superset of 375 * the ones requested, so... 376 */ 377 if ((rmode & mode) != mode) 378 error = EACCES; 379 } 380 nfsm_reqdone; 381 } else 382 return (nfsspec_access(ap)); 383 /* 384 * Disallow write attempts on filesystems mounted read-only; 385 * unless the file is a socket, fifo, or a block or character 386 * device resident on the filesystem. 387 */ 388 if (!error && (ap->a_mode & VWRITE) && 389 (vp->v_mount->mnt_flag & MNT_RDONLY)) { 390 switch (vp->v_type) { 391 case VREG: 392 case VDIR: 393 case VLNK: 394 error = EROFS; 395 default: 396 break; 397 } 398 } 399 400 if (!error || error == EACCES) { 401 /* 402 * If we got the same result as for a previous, 403 * different request, OR it in. Don't update 404 * the timestamp in that case. 405 */ 406 if (cachevalid && np->n_accstamp != -1 && 407 error == np->n_accerror) { 408 if (!error) 409 np->n_accmode |= ap->a_mode; 410 else if ((np->n_accmode & ap->a_mode) == ap->a_mode) 411 np->n_accmode = ap->a_mode; 412 } else { 413 np->n_accstamp = time.tv_sec; 414 np->n_accuid = ap->a_cred->cr_uid; 415 np->n_accmode = ap->a_mode; 416 np->n_accerror = error; 417 } 418 } 419 420 return (error); 421 } 422 423 /* 424 * nfs open vnode op 425 * Check to see if the type is ok 426 * and that deletion is not in progress. 427 * For paged in text files, you will need to flush the page cache 428 * if consistency is lost. 429 */ 430 /* ARGSUSED */ 431 int 432 nfs_open(v) 433 void *v; 434 { 435 struct vop_open_args /* { 436 struct vnode *a_vp; 437 int a_mode; 438 struct ucred *a_cred; 439 struct proc *a_p; 440 } */ *ap = v; 441 struct vnode *vp = ap->a_vp; 442 struct nfsnode *np = VTONFS(vp); 443 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 444 struct vattr vattr; 445 int error; 446 447 if (vp->v_type != VREG && vp->v_type != VDIR && vp->v_type != VLNK) { 448 return (EACCES); 449 } 450 451 /* 452 * Initialize read and write creds here, for swapfiles 453 * and other paths that don't set the creds themselves. 454 */ 455 456 if (ap->a_mode & FREAD) { 457 if (np->n_rcred) { 458 crfree(np->n_rcred); 459 } 460 np->n_rcred = ap->a_cred; 461 crhold(np->n_rcred); 462 } 463 if (ap->a_mode & FWRITE) { 464 if (np->n_wcred) { 465 crfree(np->n_wcred); 466 } 467 np->n_wcred = ap->a_cred; 468 crhold(np->n_wcred); 469 } 470 471 #ifndef NFS_V2_ONLY 472 /* 473 * Get a valid lease. If cached data is stale, flush it. 474 */ 475 if (nmp->nm_flag & NFSMNT_NQNFS) { 476 if (NQNFS_CKINVALID(vp, np, ND_READ)) { 477 do { 478 error = nqnfs_getlease(vp, ND_READ, ap->a_cred, 479 ap->a_p); 480 } while (error == NQNFS_EXPIRED); 481 if (error) 482 return (error); 483 if (np->n_lrev != np->n_brev || 484 (np->n_flag & NQNFSNONCACHE)) { 485 if ((error = nfs_vinvalbuf(vp, V_SAVE, ap->a_cred, 486 ap->a_p, 1)) == EINTR) 487 return (error); 488 np->n_brev = np->n_lrev; 489 } 490 } 491 } else 492 #endif 493 { 494 if (np->n_flag & NMODIFIED) { 495 if ((error = nfs_vinvalbuf(vp, V_SAVE, ap->a_cred, 496 ap->a_p, 1)) == EINTR) 497 return (error); 498 np->n_attrstamp = 0; 499 if (vp->v_type == VDIR) { 500 nfs_invaldircache(vp, 0); 501 np->n_direofoffset = 0; 502 } 503 error = VOP_GETATTR(vp, &vattr, ap->a_cred, ap->a_p); 504 if (error) 505 return (error); 506 np->n_mtime = vattr.va_mtime.tv_sec; 507 } else { 508 error = VOP_GETATTR(vp, &vattr, ap->a_cred, ap->a_p); 509 if (error) 510 return (error); 511 if (np->n_mtime != vattr.va_mtime.tv_sec) { 512 if (vp->v_type == VDIR) { 513 nfs_invaldircache(vp, 0); 514 np->n_direofoffset = 0; 515 } 516 if ((error = nfs_vinvalbuf(vp, V_SAVE, 517 ap->a_cred, ap->a_p, 1)) == EINTR) 518 return (error); 519 np->n_mtime = vattr.va_mtime.tv_sec; 520 } 521 } 522 } 523 if ((nmp->nm_flag & NFSMNT_NQNFS) == 0) 524 np->n_attrstamp = 0; /* For Open/Close consistency */ 525 return (0); 526 } 527 528 /* 529 * nfs close vnode op 530 * What an NFS client should do upon close after writing is a debatable issue. 531 * Most NFS clients push delayed writes to the server upon close, basically for 532 * two reasons: 533 * 1 - So that any write errors may be reported back to the client process 534 * doing the close system call. By far the two most likely errors are 535 * NFSERR_NOSPC and NFSERR_DQUOT to indicate space allocation failure. 536 * 2 - To put a worst case upper bound on cache inconsistency between 537 * multiple clients for the file. 538 * There is also a consistency problem for Version 2 of the protocol w.r.t. 539 * not being able to tell if other clients are writing a file concurrently, 540 * since there is no way of knowing if the changed modify time in the reply 541 * is only due to the write for this client. 542 * (NFS Version 3 provides weak cache consistency data in the reply that 543 * should be sufficient to detect and handle this case.) 544 * 545 * The current code does the following: 546 * for NFS Version 2 - play it safe and flush/invalidate all dirty buffers 547 * for NFS Version 3 - flush dirty buffers to the server but don't invalidate 548 * or commit them (this satisfies 1 and 2 except for the 549 * case where the server crashes after this close but 550 * before the commit RPC, which is felt to be "good 551 * enough". Changing the last argument to nfs_flush() to 552 * a 1 would force a commit operation, if it is felt a 553 * commit is necessary now. 554 * for NQNFS - do nothing now, since 2 is dealt with via leases and 555 * 1 should be dealt with via an fsync() system call for 556 * cases where write errors are important. 557 */ 558 /* ARGSUSED */ 559 int 560 nfs_close(v) 561 void *v; 562 { 563 struct vop_close_args /* { 564 struct vnodeop_desc *a_desc; 565 struct vnode *a_vp; 566 int a_fflag; 567 struct ucred *a_cred; 568 struct proc *a_p; 569 } */ *ap = v; 570 struct vnode *vp = ap->a_vp; 571 struct nfsnode *np = VTONFS(vp); 572 int error = 0; 573 UVMHIST_FUNC("nfs_close"); UVMHIST_CALLED(ubchist); 574 575 if (vp->v_type == VREG) { 576 if ((VFSTONFS(vp->v_mount)->nm_flag & NFSMNT_NQNFS) == 0 && 577 (np->n_flag & NMODIFIED)) { 578 if (NFS_ISV3(vp)) { 579 error = nfs_flush(vp, ap->a_cred, MNT_WAIT, ap->a_p, 0); 580 np->n_flag &= ~NMODIFIED; 581 } else 582 error = nfs_vinvalbuf(vp, V_SAVE, ap->a_cred, ap->a_p, 1); 583 np->n_attrstamp = 0; 584 } 585 if (np->n_flag & NWRITEERR) { 586 np->n_flag &= ~NWRITEERR; 587 error = np->n_error; 588 } 589 } 590 UVMHIST_LOG(ubchist, "returning %d", error,0,0,0); 591 return (error); 592 } 593 594 /* 595 * nfs getattr call from vfs. 596 */ 597 int 598 nfs_getattr(v) 599 void *v; 600 { 601 struct vop_getattr_args /* { 602 struct vnode *a_vp; 603 struct vattr *a_vap; 604 struct ucred *a_cred; 605 struct proc *a_p; 606 } */ *ap = v; 607 struct vnode *vp = ap->a_vp; 608 struct nfsnode *np = VTONFS(vp); 609 caddr_t cp; 610 u_int32_t *tl; 611 int32_t t1, t2; 612 caddr_t bpos, dpos; 613 int error = 0; 614 struct mbuf *mreq, *mrep, *md, *mb; 615 const int v3 = NFS_ISV3(vp); 616 617 /* 618 * Update local times for special files. 619 */ 620 if (np->n_flag & (NACC | NUPD)) 621 np->n_flag |= NCHG; 622 /* 623 * First look in the cache. 624 */ 625 if (nfs_getattrcache(vp, ap->a_vap) == 0) 626 return (0); 627 nfsstats.rpccnt[NFSPROC_GETATTR]++; 628 nfsm_reqhead(vp, NFSPROC_GETATTR, NFSX_FH(v3)); 629 nfsm_fhtom(vp, v3); 630 nfsm_request(vp, NFSPROC_GETATTR, ap->a_p, ap->a_cred); 631 if (!error) { 632 nfsm_loadattr(vp, ap->a_vap, 0); 633 if (vp->v_type == VDIR && 634 ap->a_vap->va_blocksize < NFS_DIRFRAGSIZ) 635 ap->a_vap->va_blocksize = NFS_DIRFRAGSIZ; 636 } 637 nfsm_reqdone; 638 return (error); 639 } 640 641 /* 642 * nfs setattr call. 643 */ 644 int 645 nfs_setattr(v) 646 void *v; 647 { 648 struct vop_setattr_args /* { 649 struct vnodeop_desc *a_desc; 650 struct vnode *a_vp; 651 struct vattr *a_vap; 652 struct ucred *a_cred; 653 struct proc *a_p; 654 } */ *ap = v; 655 struct vnode *vp = ap->a_vp; 656 struct nfsnode *np = VTONFS(vp); 657 struct vattr *vap = ap->a_vap; 658 int error = 0; 659 u_quad_t tsize = 0; 660 661 /* 662 * Setting of flags is not supported. 663 */ 664 if (vap->va_flags != VNOVAL) 665 return (EOPNOTSUPP); 666 667 /* 668 * Disallow write attempts if the filesystem is mounted read-only. 669 */ 670 if ((vap->va_uid != (uid_t)VNOVAL || 671 vap->va_gid != (gid_t)VNOVAL || vap->va_atime.tv_sec != VNOVAL || 672 vap->va_mtime.tv_sec != VNOVAL || vap->va_mode != (mode_t)VNOVAL) && 673 (vp->v_mount->mnt_flag & MNT_RDONLY)) 674 return (EROFS); 675 if (vap->va_size != VNOVAL) { 676 switch (vp->v_type) { 677 case VDIR: 678 return (EISDIR); 679 case VCHR: 680 case VBLK: 681 case VSOCK: 682 case VFIFO: 683 if (vap->va_mtime.tv_sec == VNOVAL && 684 vap->va_atime.tv_sec == VNOVAL && 685 vap->va_mode == (mode_t)VNOVAL && 686 vap->va_uid == (uid_t)VNOVAL && 687 vap->va_gid == (gid_t)VNOVAL) 688 return (0); 689 vap->va_size = VNOVAL; 690 break; 691 default: 692 /* 693 * Disallow write attempts if the filesystem is 694 * mounted read-only. 695 */ 696 if (vp->v_mount->mnt_flag & MNT_RDONLY) 697 return (EROFS); 698 uvm_vnp_setsize(vp, vap->va_size); 699 tsize = np->n_size; 700 np->n_size = vap->va_size; 701 if (vap->va_size == 0) 702 error = nfs_vinvalbuf(vp, 0, 703 ap->a_cred, ap->a_p, 1); 704 else 705 error = nfs_vinvalbuf(vp, V_SAVE, 706 ap->a_cred, ap->a_p, 1); 707 if (error) { 708 uvm_vnp_setsize(vp, tsize); 709 return (error); 710 } 711 np->n_vattr->va_size = vap->va_size; 712 } 713 } else if ((vap->va_mtime.tv_sec != VNOVAL || 714 vap->va_atime.tv_sec != VNOVAL) && 715 vp->v_type == VREG && 716 (error = nfs_vinvalbuf(vp, V_SAVE, ap->a_cred, 717 ap->a_p, 1)) == EINTR) 718 return (error); 719 error = nfs_setattrrpc(vp, vap, ap->a_cred, ap->a_p); 720 if (error && vap->va_size != VNOVAL) { 721 np->n_size = np->n_vattr->va_size = tsize; 722 uvm_vnp_setsize(vp, np->n_size); 723 } 724 VN_KNOTE(vp, NOTE_ATTRIB); 725 return (error); 726 } 727 728 /* 729 * Do an nfs setattr rpc. 730 */ 731 int 732 nfs_setattrrpc(vp, vap, cred, procp) 733 struct vnode *vp; 734 struct vattr *vap; 735 struct ucred *cred; 736 struct proc *procp; 737 { 738 struct nfsv2_sattr *sp; 739 caddr_t cp; 740 int32_t t1, t2; 741 caddr_t bpos, dpos, cp2; 742 u_int32_t *tl; 743 int error = 0, wccflag = NFSV3_WCCRATTR; 744 struct mbuf *mreq, *mrep, *md, *mb; 745 const int v3 = NFS_ISV3(vp); 746 747 nfsstats.rpccnt[NFSPROC_SETATTR]++; 748 nfsm_reqhead(vp, NFSPROC_SETATTR, NFSX_FH(v3) + NFSX_SATTR(v3)); 749 nfsm_fhtom(vp, v3); 750 if (v3) { 751 nfsm_v3attrbuild(vap, TRUE); 752 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); 753 *tl = nfs_false; 754 } else { 755 nfsm_build(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 756 if (vap->va_mode == (mode_t)VNOVAL) 757 sp->sa_mode = nfs_xdrneg1; 758 else 759 sp->sa_mode = vtonfsv2_mode(vp->v_type, vap->va_mode); 760 if (vap->va_uid == (uid_t)VNOVAL) 761 sp->sa_uid = nfs_xdrneg1; 762 else 763 sp->sa_uid = txdr_unsigned(vap->va_uid); 764 if (vap->va_gid == (gid_t)VNOVAL) 765 sp->sa_gid = nfs_xdrneg1; 766 else 767 sp->sa_gid = txdr_unsigned(vap->va_gid); 768 sp->sa_size = txdr_unsigned(vap->va_size); 769 txdr_nfsv2time(&vap->va_atime, &sp->sa_atime); 770 txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime); 771 } 772 nfsm_request(vp, NFSPROC_SETATTR, procp, cred); 773 if (v3) { 774 nfsm_wcc_data(vp, wccflag, 0); 775 } else 776 nfsm_loadattr(vp, (struct vattr *)0, 0); 777 nfsm_reqdone; 778 return (error); 779 } 780 781 /* 782 * nfs lookup call, one step at a time... 783 * First look in cache 784 * If not found, unlock the directory nfsnode and do the rpc 785 * 786 * This code is full of lock/unlock statements and checks, because 787 * we continue after cache_lookup has finished (we need to check 788 * with the attr cache and do an rpc if it has timed out). This means 789 * that the locking effects of cache_lookup have to be taken into 790 * account. 791 */ 792 int 793 nfs_lookup(v) 794 void *v; 795 { 796 struct vop_lookup_args /* { 797 struct vnodeop_desc *a_desc; 798 struct vnode *a_dvp; 799 struct vnode **a_vpp; 800 struct componentname *a_cnp; 801 } */ *ap = v; 802 struct componentname *cnp = ap->a_cnp; 803 struct vnode *dvp = ap->a_dvp; 804 struct vnode **vpp = ap->a_vpp; 805 int flags; 806 struct vnode *newvp; 807 u_int32_t *tl; 808 caddr_t cp; 809 int32_t t1, t2; 810 caddr_t bpos, dpos, cp2; 811 struct mbuf *mreq, *mrep, *md, *mb; 812 long len; 813 nfsfh_t *fhp; 814 struct nfsnode *np; 815 int lockparent, wantparent, error = 0, attrflag, fhsize; 816 const int v3 = NFS_ISV3(dvp); 817 818 cnp->cn_flags &= ~PDIRUNLOCK; 819 flags = cnp->cn_flags; 820 821 *vpp = NULLVP; 822 newvp = NULLVP; 823 if ((flags & ISLASTCN) && (dvp->v_mount->mnt_flag & MNT_RDONLY) && 824 (cnp->cn_nameiop == DELETE || cnp->cn_nameiop == RENAME)) 825 return (EROFS); 826 if (dvp->v_type != VDIR) 827 return (ENOTDIR); 828 829 lockparent = flags & LOCKPARENT; 830 wantparent = flags & (LOCKPARENT|WANTPARENT); 831 np = VTONFS(dvp); 832 833 /* 834 * Before tediously performing a linear scan of the directory, 835 * check the name cache to see if the directory/name pair 836 * we are looking for is known already. 837 * If the directory/name pair is found in the name cache, 838 * we have to ensure the directory has not changed from 839 * the time the cache entry has been created. If it has, 840 * the cache entry has to be ignored. 841 */ 842 if ((error = cache_lookup(dvp, vpp, cnp)) >= 0) { 843 struct vattr vattr; 844 int err2; 845 846 if (error && error != ENOENT) { 847 *vpp = NULLVP; 848 return error; 849 } 850 851 if (cnp->cn_flags & PDIRUNLOCK) { 852 err2 = vn_lock(dvp, LK_EXCLUSIVE | LK_RETRY); 853 if (err2 != 0) { 854 *vpp = NULLVP; 855 return err2; 856 } 857 cnp->cn_flags &= ~PDIRUNLOCK; 858 } 859 860 err2 = VOP_ACCESS(dvp, VEXEC, cnp->cn_cred, cnp->cn_proc); 861 if (err2 != 0) { 862 if (error == 0) { 863 if (*vpp != dvp) 864 vput(*vpp); 865 else 866 vrele(*vpp); 867 } 868 *vpp = NULLVP; 869 return err2; 870 } 871 872 if (error == ENOENT) { 873 if (!VOP_GETATTR(dvp, &vattr, cnp->cn_cred, 874 cnp->cn_proc) && vattr.va_mtime.tv_sec == 875 VTONFS(dvp)->n_nctime) 876 return ENOENT; 877 cache_purge(dvp); 878 np->n_nctime = 0; 879 goto dorpc; 880 } 881 882 newvp = *vpp; 883 if (!VOP_GETATTR(newvp, &vattr, cnp->cn_cred, cnp->cn_proc) 884 && vattr.va_ctime.tv_sec == VTONFS(newvp)->n_ctime) 885 { 886 nfsstats.lookupcache_hits++; 887 if (cnp->cn_nameiop != LOOKUP && (flags & ISLASTCN)) 888 cnp->cn_flags |= SAVENAME; 889 if ((!lockparent || !(flags & ISLASTCN)) && 890 newvp != dvp) 891 VOP_UNLOCK(dvp, 0); 892 return (0); 893 } 894 cache_purge(newvp); 895 if (newvp != dvp) 896 vput(newvp); 897 else 898 vrele(newvp); 899 *vpp = NULLVP; 900 } 901 dorpc: 902 error = 0; 903 newvp = NULLVP; 904 nfsstats.lookupcache_misses++; 905 nfsstats.rpccnt[NFSPROC_LOOKUP]++; 906 len = cnp->cn_namelen; 907 nfsm_reqhead(dvp, NFSPROC_LOOKUP, 908 NFSX_FH(v3) + NFSX_UNSIGNED + nfsm_rndup(len)); 909 nfsm_fhtom(dvp, v3); 910 nfsm_strtom(cnp->cn_nameptr, len, NFS_MAXNAMLEN); 911 nfsm_request(dvp, NFSPROC_LOOKUP, cnp->cn_proc, cnp->cn_cred); 912 if (error) { 913 nfsm_postop_attr(dvp, attrflag, 0); 914 m_freem(mrep); 915 goto nfsmout; 916 } 917 nfsm_getfh(fhp, fhsize, v3); 918 919 /* 920 * Handle RENAME case... 921 */ 922 if (cnp->cn_nameiop == RENAME && wantparent && (flags & ISLASTCN)) { 923 if (NFS_CMPFH(np, fhp, fhsize)) { 924 m_freem(mrep); 925 return (EISDIR); 926 } 927 error = nfs_nget(dvp->v_mount, fhp, fhsize, &np); 928 if (error) { 929 m_freem(mrep); 930 return error; 931 } 932 newvp = NFSTOV(np); 933 if (v3) { 934 nfsm_postop_attr(newvp, attrflag, 0); 935 nfsm_postop_attr(dvp, attrflag, 0); 936 } else 937 nfsm_loadattr(newvp, (struct vattr *)0, 0); 938 *vpp = newvp; 939 m_freem(mrep); 940 cnp->cn_flags |= SAVENAME; 941 if (!lockparent) { 942 VOP_UNLOCK(dvp, 0); 943 cnp->cn_flags |= PDIRUNLOCK; 944 } 945 return (0); 946 } 947 948 /* 949 * The postop attr handling is duplicated for each if case, 950 * because it should be done while dvp is locked (unlocking 951 * dvp is different for each case). 952 */ 953 954 if (NFS_CMPFH(np, fhp, fhsize)) { 955 /* 956 * "." lookup 957 */ 958 VREF(dvp); 959 newvp = dvp; 960 if (v3) { 961 nfsm_postop_attr(newvp, attrflag, 0); 962 nfsm_postop_attr(dvp, attrflag, 0); 963 } else 964 nfsm_loadattr(newvp, (struct vattr *)0, 0); 965 } else if (flags & ISDOTDOT) { 966 /* 967 * ".." lookup 968 */ 969 VOP_UNLOCK(dvp, 0); 970 cnp->cn_flags |= PDIRUNLOCK; 971 972 error = nfs_nget(dvp->v_mount, fhp, fhsize, &np); 973 if (error) { 974 if (vn_lock(dvp, LK_EXCLUSIVE | LK_RETRY) == 0) 975 cnp->cn_flags &= ~PDIRUNLOCK; 976 m_freem(mrep); 977 return error; 978 } 979 newvp = NFSTOV(np); 980 981 if (v3) { 982 nfsm_postop_attr(newvp, attrflag, 0); 983 nfsm_postop_attr(dvp, attrflag, 0); 984 } else 985 nfsm_loadattr(newvp, (struct vattr *)0, 0); 986 987 if (lockparent && (flags & ISLASTCN)) { 988 if ((error = vn_lock(dvp, LK_EXCLUSIVE))) { 989 m_freem(mrep); 990 vput(newvp); 991 return error; 992 } 993 cnp->cn_flags &= ~PDIRUNLOCK; 994 } 995 } else { 996 /* 997 * Other lookups. 998 */ 999 error = nfs_nget(dvp->v_mount, fhp, fhsize, &np); 1000 if (error) { 1001 m_freem(mrep); 1002 return error; 1003 } 1004 newvp = NFSTOV(np); 1005 if (v3) { 1006 nfsm_postop_attr(newvp, attrflag, 0); 1007 nfsm_postop_attr(dvp, attrflag, 0); 1008 } else 1009 nfsm_loadattr(newvp, (struct vattr *)0, 0); 1010 if (!lockparent || !(flags & ISLASTCN)) { 1011 VOP_UNLOCK(dvp, 0); 1012 cnp->cn_flags |= PDIRUNLOCK; 1013 } 1014 } 1015 if (cnp->cn_nameiop != LOOKUP && (flags & ISLASTCN)) 1016 cnp->cn_flags |= SAVENAME; 1017 if ((cnp->cn_flags & MAKEENTRY) && 1018 (cnp->cn_nameiop != DELETE || !(flags & ISLASTCN))) { 1019 np->n_ctime = np->n_vattr->va_ctime.tv_sec; 1020 cache_enter(dvp, newvp, cnp); 1021 } 1022 *vpp = newvp; 1023 nfsm_reqdone; 1024 if (error) { 1025 /* 1026 * We get here only because of errors returned by 1027 * the RPC. Otherwise we'll have returned above 1028 * (the nfsm_* macros will jump to nfsm_reqdone 1029 * on error). 1030 */ 1031 if (error == ENOENT && (cnp->cn_flags & MAKEENTRY) && 1032 cnp->cn_nameiop != CREATE) { 1033 if (VTONFS(dvp)->n_nctime == 0) 1034 VTONFS(dvp)->n_nctime = 1035 VTONFS(dvp)->n_vattr->va_mtime.tv_sec; 1036 cache_enter(dvp, NULL, cnp); 1037 } 1038 if (newvp != NULLVP) { 1039 vrele(newvp); 1040 if (newvp != dvp) 1041 VOP_UNLOCK(newvp, 0); 1042 } 1043 if ((cnp->cn_nameiop == CREATE || cnp->cn_nameiop == RENAME) && 1044 (flags & ISLASTCN) && error == ENOENT) { 1045 if (dvp->v_mount->mnt_flag & MNT_RDONLY) 1046 error = EROFS; 1047 else 1048 error = EJUSTRETURN; 1049 } 1050 if (cnp->cn_nameiop != LOOKUP && (flags & ISLASTCN)) 1051 cnp->cn_flags |= SAVENAME; 1052 *vpp = NULL; 1053 } 1054 1055 return error; 1056 } 1057 1058 /* 1059 * nfs read call. 1060 * Just call nfs_bioread() to do the work. 1061 */ 1062 int 1063 nfs_read(v) 1064 void *v; 1065 { 1066 struct vop_read_args /* { 1067 struct vnode *a_vp; 1068 struct uio *a_uio; 1069 int a_ioflag; 1070 struct ucred *a_cred; 1071 } */ *ap = v; 1072 struct vnode *vp = ap->a_vp; 1073 1074 if (vp->v_type != VREG) 1075 return (EPERM); 1076 return (nfs_bioread(vp, ap->a_uio, ap->a_ioflag, ap->a_cred, 0)); 1077 } 1078 1079 /* 1080 * nfs readlink call 1081 */ 1082 int 1083 nfs_readlink(v) 1084 void *v; 1085 { 1086 struct vop_readlink_args /* { 1087 struct vnode *a_vp; 1088 struct uio *a_uio; 1089 struct ucred *a_cred; 1090 } */ *ap = v; 1091 struct vnode *vp = ap->a_vp; 1092 1093 if (vp->v_type != VLNK) 1094 return (EPERM); 1095 return (nfs_bioread(vp, ap->a_uio, 0, ap->a_cred, 0)); 1096 } 1097 1098 /* 1099 * Do a readlink rpc. 1100 * Called by nfs_doio() from below the buffer cache. 1101 */ 1102 int 1103 nfs_readlinkrpc(vp, uiop, cred) 1104 struct vnode *vp; 1105 struct uio *uiop; 1106 struct ucred *cred; 1107 { 1108 u_int32_t *tl; 1109 caddr_t cp; 1110 int32_t t1, t2; 1111 caddr_t bpos, dpos, cp2; 1112 int error = 0, len, attrflag; 1113 struct mbuf *mreq, *mrep, *md, *mb; 1114 const int v3 = NFS_ISV3(vp); 1115 1116 nfsstats.rpccnt[NFSPROC_READLINK]++; 1117 nfsm_reqhead(vp, NFSPROC_READLINK, NFSX_FH(v3)); 1118 nfsm_fhtom(vp, v3); 1119 nfsm_request(vp, NFSPROC_READLINK, uiop->uio_procp, cred); 1120 if (v3) 1121 nfsm_postop_attr(vp, attrflag, 0); 1122 if (!error) { 1123 nfsm_strsiz(len, NFS_MAXPATHLEN); 1124 nfsm_mtouio(uiop, len); 1125 } 1126 nfsm_reqdone; 1127 return (error); 1128 } 1129 1130 /* 1131 * nfs read rpc call 1132 * Ditto above 1133 */ 1134 int 1135 nfs_readrpc(vp, uiop) 1136 struct vnode *vp; 1137 struct uio *uiop; 1138 { 1139 u_int32_t *tl; 1140 caddr_t cp; 1141 int32_t t1, t2; 1142 caddr_t bpos, dpos, cp2; 1143 struct mbuf *mreq, *mrep, *md, *mb; 1144 struct nfsmount *nmp; 1145 int error = 0, len, retlen, tsiz, eof, attrflag; 1146 const int v3 = NFS_ISV3(vp); 1147 1148 #ifndef nolint 1149 eof = 0; 1150 #endif 1151 nmp = VFSTONFS(vp->v_mount); 1152 tsiz = uiop->uio_resid; 1153 if (uiop->uio_offset + tsiz > nmp->nm_maxfilesize) 1154 return (EFBIG); 1155 while (tsiz > 0) { 1156 nfsstats.rpccnt[NFSPROC_READ]++; 1157 len = (tsiz > nmp->nm_rsize) ? nmp->nm_rsize : tsiz; 1158 nfsm_reqhead(vp, NFSPROC_READ, NFSX_FH(v3) + NFSX_UNSIGNED * 3); 1159 nfsm_fhtom(vp, v3); 1160 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED * 3); 1161 if (v3) { 1162 txdr_hyper(uiop->uio_offset, tl); 1163 *(tl + 2) = txdr_unsigned(len); 1164 } else { 1165 *tl++ = txdr_unsigned(uiop->uio_offset); 1166 *tl++ = txdr_unsigned(len); 1167 *tl = 0; 1168 } 1169 nfsm_request(vp, NFSPROC_READ, uiop->uio_procp, 1170 VTONFS(vp)->n_rcred); 1171 if (v3) { 1172 nfsm_postop_attr(vp, attrflag, NAC_NOTRUNC); 1173 if (error) { 1174 m_freem(mrep); 1175 goto nfsmout; 1176 } 1177 nfsm_dissect(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 1178 eof = fxdr_unsigned(int, *(tl + 1)); 1179 } else 1180 nfsm_loadattr(vp, (struct vattr *)0, NAC_NOTRUNC); 1181 nfsm_strsiz(retlen, nmp->nm_rsize); 1182 nfsm_mtouio(uiop, retlen); 1183 m_freem(mrep); 1184 tsiz -= retlen; 1185 if (v3) { 1186 if (eof || retlen == 0) 1187 tsiz = 0; 1188 } else if (retlen < len) 1189 tsiz = 0; 1190 } 1191 nfsmout: 1192 return (error); 1193 } 1194 1195 /* 1196 * nfs write call 1197 */ 1198 int 1199 nfs_writerpc(vp, uiop, iomode, must_commit) 1200 struct vnode *vp; 1201 struct uio *uiop; 1202 int *iomode, *must_commit; 1203 { 1204 u_int32_t *tl; 1205 caddr_t cp; 1206 int32_t t1, t2, backup; 1207 caddr_t bpos, dpos, cp2; 1208 struct mbuf *mreq, *mrep, *md, *mb; 1209 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 1210 int error = 0, len, tsiz, wccflag = NFSV3_WCCRATTR, rlen, commit; 1211 const int v3 = NFS_ISV3(vp); 1212 int committed = NFSV3WRITE_FILESYNC; 1213 1214 if (vp->v_mount->mnt_flag & MNT_RDONLY) { 1215 panic("writerpc readonly vp %p", vp); 1216 } 1217 1218 #ifdef DIAGNOSTIC 1219 if (uiop->uio_iovcnt != 1) 1220 panic("nfs: writerpc iovcnt > 1"); 1221 #endif 1222 *must_commit = 0; 1223 tsiz = uiop->uio_resid; 1224 if (uiop->uio_offset + tsiz > nmp->nm_maxfilesize) 1225 return (EFBIG); 1226 while (tsiz > 0) { 1227 nfsstats.rpccnt[NFSPROC_WRITE]++; 1228 len = min(tsiz, nmp->nm_wsize); 1229 nfsm_reqhead(vp, NFSPROC_WRITE, 1230 NFSX_FH(v3) + 5 * NFSX_UNSIGNED + nfsm_rndup(len)); 1231 nfsm_fhtom(vp, v3); 1232 if (v3) { 1233 nfsm_build(tl, u_int32_t *, 5 * NFSX_UNSIGNED); 1234 txdr_hyper(uiop->uio_offset, tl); 1235 tl += 2; 1236 *tl++ = txdr_unsigned(len); 1237 *tl++ = txdr_unsigned(*iomode); 1238 *tl = txdr_unsigned(len); 1239 } else { 1240 u_int32_t x; 1241 1242 nfsm_build(tl, u_int32_t *, 4 * NFSX_UNSIGNED); 1243 /* Set both "begin" and "current" to non-garbage. */ 1244 x = txdr_unsigned((u_int32_t)uiop->uio_offset); 1245 *tl++ = x; /* "begin offset" */ 1246 *tl++ = x; /* "current offset" */ 1247 x = txdr_unsigned(len); 1248 *tl++ = x; /* total to this offset */ 1249 *tl = x; /* size of this write */ 1250 1251 } 1252 nfsm_uiotom(uiop, len); 1253 nfsm_request(vp, NFSPROC_WRITE, uiop->uio_procp, 1254 VTONFS(vp)->n_wcred); 1255 if (v3) { 1256 wccflag = NFSV3_WCCCHK; 1257 nfsm_wcc_data(vp, wccflag, NAC_NOTRUNC); 1258 if (!error) { 1259 nfsm_dissect(tl, u_int32_t *, 2 * NFSX_UNSIGNED 1260 + NFSX_V3WRITEVERF); 1261 rlen = fxdr_unsigned(int, *tl++); 1262 if (rlen == 0) { 1263 error = NFSERR_IO; 1264 m_freem(mrep); 1265 break; 1266 } else if (rlen < len) { 1267 backup = len - rlen; 1268 uiop->uio_iov->iov_base = 1269 (caddr_t)uiop->uio_iov->iov_base - 1270 backup; 1271 uiop->uio_iov->iov_len += backup; 1272 uiop->uio_offset -= backup; 1273 uiop->uio_resid += backup; 1274 len = rlen; 1275 } 1276 commit = fxdr_unsigned(int, *tl++); 1277 1278 /* 1279 * Return the lowest committment level 1280 * obtained by any of the RPCs. 1281 */ 1282 if (committed == NFSV3WRITE_FILESYNC) 1283 committed = commit; 1284 else if (committed == NFSV3WRITE_DATASYNC && 1285 commit == NFSV3WRITE_UNSTABLE) 1286 committed = commit; 1287 if ((nmp->nm_iflag & NFSMNT_HASWRITEVERF) == 0){ 1288 memcpy((caddr_t)nmp->nm_writeverf, (caddr_t)tl, 1289 NFSX_V3WRITEVERF); 1290 nmp->nm_iflag |= NFSMNT_HASWRITEVERF; 1291 } else if (memcmp((caddr_t)tl, 1292 (caddr_t)nmp->nm_writeverf, NFSX_V3WRITEVERF)) { 1293 *must_commit = 1; 1294 memcpy((caddr_t)nmp->nm_writeverf, (caddr_t)tl, 1295 NFSX_V3WRITEVERF); 1296 } 1297 } 1298 } else 1299 nfsm_loadattr(vp, (struct vattr *)0, NAC_NOTRUNC); 1300 if (wccflag) 1301 VTONFS(vp)->n_mtime = VTONFS(vp)->n_vattr->va_mtime.tv_sec; 1302 m_freem(mrep); 1303 if (error) 1304 break; 1305 tsiz -= len; 1306 } 1307 nfsmout: 1308 *iomode = committed; 1309 if (error) 1310 uiop->uio_resid = tsiz; 1311 return (error); 1312 } 1313 1314 /* 1315 * nfs mknod rpc 1316 * For NFS v2 this is a kludge. Use a create rpc but with the IFMT bits of the 1317 * mode set to specify the file type and the size field for rdev. 1318 */ 1319 int 1320 nfs_mknodrpc(dvp, vpp, cnp, vap) 1321 struct vnode *dvp; 1322 struct vnode **vpp; 1323 struct componentname *cnp; 1324 struct vattr *vap; 1325 { 1326 struct nfsv2_sattr *sp; 1327 u_int32_t *tl; 1328 caddr_t cp; 1329 int32_t t1, t2; 1330 struct vnode *newvp = (struct vnode *)0; 1331 struct nfsnode *np; 1332 char *cp2; 1333 caddr_t bpos, dpos; 1334 int error = 0, wccflag = NFSV3_WCCRATTR, gotvp = 0; 1335 struct mbuf *mreq, *mrep, *md, *mb; 1336 u_int32_t rdev; 1337 const int v3 = NFS_ISV3(dvp); 1338 1339 if (vap->va_type == VCHR || vap->va_type == VBLK) 1340 rdev = txdr_unsigned(vap->va_rdev); 1341 else if (vap->va_type == VFIFO || vap->va_type == VSOCK) 1342 rdev = nfs_xdrneg1; 1343 else { 1344 VOP_ABORTOP(dvp, cnp); 1345 vput(dvp); 1346 return (EOPNOTSUPP); 1347 } 1348 nfsstats.rpccnt[NFSPROC_MKNOD]++; 1349 nfsm_reqhead(dvp, NFSPROC_MKNOD, NFSX_FH(v3) + 4 * NFSX_UNSIGNED + 1350 + nfsm_rndup(cnp->cn_namelen) + NFSX_SATTR(v3)); 1351 nfsm_fhtom(dvp, v3); 1352 nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN); 1353 if (v3) { 1354 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); 1355 *tl++ = vtonfsv3_type(vap->va_type); 1356 nfsm_v3attrbuild(vap, FALSE); 1357 if (vap->va_type == VCHR || vap->va_type == VBLK) { 1358 nfsm_build(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 1359 *tl++ = txdr_unsigned(major(vap->va_rdev)); 1360 *tl = txdr_unsigned(minor(vap->va_rdev)); 1361 } 1362 } else { 1363 nfsm_build(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 1364 sp->sa_mode = vtonfsv2_mode(vap->va_type, vap->va_mode); 1365 sp->sa_uid = nfs_xdrneg1; 1366 sp->sa_gid = nfs_xdrneg1; 1367 sp->sa_size = rdev; 1368 txdr_nfsv2time(&vap->va_atime, &sp->sa_atime); 1369 txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime); 1370 } 1371 nfsm_request(dvp, NFSPROC_MKNOD, cnp->cn_proc, cnp->cn_cred); 1372 if (!error) { 1373 nfsm_mtofh(dvp, newvp, v3, gotvp); 1374 if (!gotvp) { 1375 error = nfs_lookitup(dvp, cnp->cn_nameptr, 1376 cnp->cn_namelen, cnp->cn_cred, cnp->cn_proc, &np); 1377 if (!error) 1378 newvp = NFSTOV(np); 1379 } 1380 } 1381 if (v3) 1382 nfsm_wcc_data(dvp, wccflag, 0); 1383 nfsm_reqdone; 1384 if (error) { 1385 if (newvp) 1386 vput(newvp); 1387 } else { 1388 if (cnp->cn_flags & MAKEENTRY) 1389 cache_enter(dvp, newvp, cnp); 1390 *vpp = newvp; 1391 } 1392 PNBUF_PUT(cnp->cn_pnbuf); 1393 VTONFS(dvp)->n_flag |= NMODIFIED; 1394 if (!wccflag) 1395 VTONFS(dvp)->n_attrstamp = 0; 1396 vput(dvp); 1397 return (error); 1398 } 1399 1400 /* 1401 * nfs mknod vop 1402 * just call nfs_mknodrpc() to do the work. 1403 */ 1404 /* ARGSUSED */ 1405 int 1406 nfs_mknod(v) 1407 void *v; 1408 { 1409 struct vop_mknod_args /* { 1410 struct vnode *a_dvp; 1411 struct vnode **a_vpp; 1412 struct componentname *a_cnp; 1413 struct vattr *a_vap; 1414 } */ *ap = v; 1415 int error; 1416 1417 error = nfs_mknodrpc(ap->a_dvp, ap->a_vpp, ap->a_cnp, ap->a_vap); 1418 VN_KNOTE(ap->a_dvp, NOTE_WRITE); 1419 return (error); 1420 } 1421 1422 static u_long create_verf; 1423 /* 1424 * nfs file create call 1425 */ 1426 int 1427 nfs_create(v) 1428 void *v; 1429 { 1430 struct vop_create_args /* { 1431 struct vnode *a_dvp; 1432 struct vnode **a_vpp; 1433 struct componentname *a_cnp; 1434 struct vattr *a_vap; 1435 } */ *ap = v; 1436 struct vnode *dvp = ap->a_dvp; 1437 struct vattr *vap = ap->a_vap; 1438 struct componentname *cnp = ap->a_cnp; 1439 struct nfsv2_sattr *sp; 1440 u_int32_t *tl; 1441 caddr_t cp; 1442 int32_t t1, t2; 1443 struct nfsnode *np = (struct nfsnode *)0; 1444 struct vnode *newvp = (struct vnode *)0; 1445 caddr_t bpos, dpos, cp2; 1446 int error, wccflag = NFSV3_WCCRATTR, gotvp = 0, fmode = 0; 1447 struct mbuf *mreq, *mrep, *md, *mb; 1448 const int v3 = NFS_ISV3(dvp); 1449 1450 /* 1451 * Oops, not for me.. 1452 */ 1453 if (vap->va_type == VSOCK) 1454 return (nfs_mknodrpc(dvp, ap->a_vpp, cnp, vap)); 1455 1456 #ifdef VA_EXCLUSIVE 1457 if (vap->va_vaflags & VA_EXCLUSIVE) 1458 fmode |= O_EXCL; 1459 #endif 1460 again: 1461 error = 0; 1462 nfsstats.rpccnt[NFSPROC_CREATE]++; 1463 nfsm_reqhead(dvp, NFSPROC_CREATE, NFSX_FH(v3) + 2 * NFSX_UNSIGNED + 1464 nfsm_rndup(cnp->cn_namelen) + NFSX_SATTR(v3)); 1465 nfsm_fhtom(dvp, v3); 1466 nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN); 1467 if (v3) { 1468 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); 1469 if (fmode & O_EXCL) { 1470 *tl = txdr_unsigned(NFSV3CREATE_EXCLUSIVE); 1471 nfsm_build(tl, u_int32_t *, NFSX_V3CREATEVERF); 1472 #ifdef INET 1473 if (TAILQ_FIRST(&in_ifaddr)) 1474 *tl++ = TAILQ_FIRST(&in_ifaddr)->ia_addr.sin_addr.s_addr; 1475 else 1476 *tl++ = create_verf; 1477 #else 1478 *tl++ = create_verf; 1479 #endif 1480 *tl = ++create_verf; 1481 } else { 1482 *tl = txdr_unsigned(NFSV3CREATE_UNCHECKED); 1483 nfsm_v3attrbuild(vap, FALSE); 1484 } 1485 } else { 1486 nfsm_build(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 1487 sp->sa_mode = vtonfsv2_mode(vap->va_type, vap->va_mode); 1488 sp->sa_uid = nfs_xdrneg1; 1489 sp->sa_gid = nfs_xdrneg1; 1490 sp->sa_size = 0; 1491 txdr_nfsv2time(&vap->va_atime, &sp->sa_atime); 1492 txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime); 1493 } 1494 nfsm_request(dvp, NFSPROC_CREATE, cnp->cn_proc, cnp->cn_cred); 1495 if (!error) { 1496 nfsm_mtofh(dvp, newvp, v3, gotvp); 1497 if (!gotvp) { 1498 error = nfs_lookitup(dvp, cnp->cn_nameptr, 1499 cnp->cn_namelen, cnp->cn_cred, cnp->cn_proc, &np); 1500 if (!error) 1501 newvp = NFSTOV(np); 1502 } 1503 } 1504 if (v3) 1505 nfsm_wcc_data(dvp, wccflag, 0); 1506 nfsm_reqdone; 1507 if (error) { 1508 if (v3 && (fmode & O_EXCL) && error == NFSERR_NOTSUPP) { 1509 fmode &= ~O_EXCL; 1510 goto again; 1511 } 1512 if (newvp) 1513 vput(newvp); 1514 } else if (v3 && (fmode & O_EXCL)) 1515 error = nfs_setattrrpc(newvp, vap, cnp->cn_cred, cnp->cn_proc); 1516 if (!error) { 1517 if (cnp->cn_flags & MAKEENTRY) 1518 cache_enter(dvp, newvp, cnp); 1519 *ap->a_vpp = newvp; 1520 } 1521 PNBUF_PUT(cnp->cn_pnbuf); 1522 VTONFS(dvp)->n_flag |= NMODIFIED; 1523 if (!wccflag) 1524 VTONFS(dvp)->n_attrstamp = 0; 1525 VN_KNOTE(ap->a_dvp, NOTE_WRITE); 1526 vput(dvp); 1527 return (error); 1528 } 1529 1530 /* 1531 * nfs file remove call 1532 * To try and make nfs semantics closer to ufs semantics, a file that has 1533 * other processes using the vnode is renamed instead of removed and then 1534 * removed later on the last close. 1535 * - If v_usecount > 1 1536 * If a rename is not already in the works 1537 * call nfs_sillyrename() to set it up 1538 * else 1539 * do the remove rpc 1540 */ 1541 int 1542 nfs_remove(v) 1543 void *v; 1544 { 1545 struct vop_remove_args /* { 1546 struct vnodeop_desc *a_desc; 1547 struct vnode * a_dvp; 1548 struct vnode * a_vp; 1549 struct componentname * a_cnp; 1550 } */ *ap = v; 1551 struct vnode *vp = ap->a_vp; 1552 struct vnode *dvp = ap->a_dvp; 1553 struct componentname *cnp = ap->a_cnp; 1554 struct nfsnode *np = VTONFS(vp); 1555 int error = 0; 1556 struct vattr vattr; 1557 1558 #ifndef DIAGNOSTIC 1559 if ((cnp->cn_flags & HASBUF) == 0) 1560 panic("nfs_remove: no name"); 1561 if (vp->v_usecount < 1) 1562 panic("nfs_remove: bad v_usecount"); 1563 #endif 1564 if (vp->v_type == VDIR) 1565 error = EPERM; 1566 else if (vp->v_usecount == 1 || (np->n_sillyrename && 1567 VOP_GETATTR(vp, &vattr, cnp->cn_cred, cnp->cn_proc) == 0 && 1568 vattr.va_nlink > 1)) { 1569 /* 1570 * Purge the name cache so that the chance of a lookup for 1571 * the name succeeding while the remove is in progress is 1572 * minimized. Without node locking it can still happen, such 1573 * that an I/O op returns ESTALE, but since you get this if 1574 * another host removes the file.. 1575 */ 1576 cache_purge(vp); 1577 /* 1578 * throw away biocache buffers, mainly to avoid 1579 * unnecessary delayed writes later. 1580 */ 1581 error = nfs_vinvalbuf(vp, 0, cnp->cn_cred, cnp->cn_proc, 1); 1582 /* Do the rpc */ 1583 if (error != EINTR) 1584 error = nfs_removerpc(dvp, cnp->cn_nameptr, 1585 cnp->cn_namelen, cnp->cn_cred, cnp->cn_proc); 1586 /* 1587 * Kludge City: If the first reply to the remove rpc is lost.. 1588 * the reply to the retransmitted request will be ENOENT 1589 * since the file was in fact removed 1590 * Therefore, we cheat and return success. 1591 */ 1592 if (error == ENOENT) 1593 error = 0; 1594 } else if (!np->n_sillyrename) 1595 error = nfs_sillyrename(dvp, vp, cnp); 1596 PNBUF_PUT(cnp->cn_pnbuf); 1597 np->n_attrstamp = 0; 1598 VN_KNOTE(vp, NOTE_DELETE); 1599 VN_KNOTE(dvp, NOTE_WRITE); 1600 if (dvp == vp) 1601 vrele(vp); 1602 else 1603 vput(vp); 1604 vput(dvp); 1605 return (error); 1606 } 1607 1608 /* 1609 * nfs file remove rpc called from nfs_inactive 1610 */ 1611 int 1612 nfs_removeit(sp) 1613 struct sillyrename *sp; 1614 { 1615 1616 return (nfs_removerpc(sp->s_dvp, sp->s_name, sp->s_namlen, sp->s_cred, 1617 (struct proc *)0)); 1618 } 1619 1620 /* 1621 * Nfs remove rpc, called from nfs_remove() and nfs_removeit(). 1622 */ 1623 int 1624 nfs_removerpc(dvp, name, namelen, cred, proc) 1625 struct vnode *dvp; 1626 const char *name; 1627 int namelen; 1628 struct ucred *cred; 1629 struct proc *proc; 1630 { 1631 u_int32_t *tl; 1632 caddr_t cp; 1633 int32_t t1, t2; 1634 caddr_t bpos, dpos, cp2; 1635 int error = 0, wccflag = NFSV3_WCCRATTR; 1636 struct mbuf *mreq, *mrep, *md, *mb; 1637 const int v3 = NFS_ISV3(dvp); 1638 1639 nfsstats.rpccnt[NFSPROC_REMOVE]++; 1640 nfsm_reqhead(dvp, NFSPROC_REMOVE, 1641 NFSX_FH(v3) + NFSX_UNSIGNED + nfsm_rndup(namelen)); 1642 nfsm_fhtom(dvp, v3); 1643 nfsm_strtom(name, namelen, NFS_MAXNAMLEN); 1644 nfsm_request(dvp, NFSPROC_REMOVE, proc, cred); 1645 if (v3) 1646 nfsm_wcc_data(dvp, wccflag, 0); 1647 nfsm_reqdone; 1648 VTONFS(dvp)->n_flag |= NMODIFIED; 1649 if (!wccflag) 1650 VTONFS(dvp)->n_attrstamp = 0; 1651 return (error); 1652 } 1653 1654 /* 1655 * nfs file rename call 1656 */ 1657 int 1658 nfs_rename(v) 1659 void *v; 1660 { 1661 struct vop_rename_args /* { 1662 struct vnode *a_fdvp; 1663 struct vnode *a_fvp; 1664 struct componentname *a_fcnp; 1665 struct vnode *a_tdvp; 1666 struct vnode *a_tvp; 1667 struct componentname *a_tcnp; 1668 } */ *ap = v; 1669 struct vnode *fvp = ap->a_fvp; 1670 struct vnode *tvp = ap->a_tvp; 1671 struct vnode *fdvp = ap->a_fdvp; 1672 struct vnode *tdvp = ap->a_tdvp; 1673 struct componentname *tcnp = ap->a_tcnp; 1674 struct componentname *fcnp = ap->a_fcnp; 1675 int error; 1676 1677 #ifndef DIAGNOSTIC 1678 if ((tcnp->cn_flags & HASBUF) == 0 || 1679 (fcnp->cn_flags & HASBUF) == 0) 1680 panic("nfs_rename: no name"); 1681 #endif 1682 /* Check for cross-device rename */ 1683 if ((fvp->v_mount != tdvp->v_mount) || 1684 (tvp && (fvp->v_mount != tvp->v_mount))) { 1685 error = EXDEV; 1686 goto out; 1687 } 1688 1689 /* 1690 * If the tvp exists and is in use, sillyrename it before doing the 1691 * rename of the new file over it. 1692 */ 1693 if (tvp && tvp->v_usecount > 1 && !VTONFS(tvp)->n_sillyrename && 1694 tvp->v_type != VDIR && !nfs_sillyrename(tdvp, tvp, tcnp)) { 1695 VN_KNOTE(tvp, NOTE_DELETE); 1696 vput(tvp); 1697 tvp = NULL; 1698 } 1699 1700 error = nfs_renamerpc(fdvp, fcnp->cn_nameptr, fcnp->cn_namelen, 1701 tdvp, tcnp->cn_nameptr, tcnp->cn_namelen, tcnp->cn_cred, 1702 tcnp->cn_proc); 1703 1704 VN_KNOTE(fdvp, NOTE_WRITE); 1705 VN_KNOTE(tdvp, NOTE_WRITE); 1706 if (fvp->v_type == VDIR) { 1707 if (tvp != NULL && tvp->v_type == VDIR) 1708 cache_purge(tdvp); 1709 cache_purge(fdvp); 1710 } 1711 out: 1712 if (tdvp == tvp) 1713 vrele(tdvp); 1714 else 1715 vput(tdvp); 1716 if (tvp) 1717 vput(tvp); 1718 vrele(fdvp); 1719 vrele(fvp); 1720 /* 1721 * Kludge: Map ENOENT => 0 assuming that it is a reply to a retry. 1722 */ 1723 if (error == ENOENT) 1724 error = 0; 1725 return (error); 1726 } 1727 1728 /* 1729 * nfs file rename rpc called from nfs_remove() above 1730 */ 1731 int 1732 nfs_renameit(sdvp, scnp, sp) 1733 struct vnode *sdvp; 1734 struct componentname *scnp; 1735 struct sillyrename *sp; 1736 { 1737 return (nfs_renamerpc(sdvp, scnp->cn_nameptr, scnp->cn_namelen, 1738 sdvp, sp->s_name, sp->s_namlen, scnp->cn_cred, scnp->cn_proc)); 1739 } 1740 1741 /* 1742 * Do an nfs rename rpc. Called from nfs_rename() and nfs_renameit(). 1743 */ 1744 int 1745 nfs_renamerpc(fdvp, fnameptr, fnamelen, tdvp, tnameptr, tnamelen, cred, proc) 1746 struct vnode *fdvp; 1747 const char *fnameptr; 1748 int fnamelen; 1749 struct vnode *tdvp; 1750 const char *tnameptr; 1751 int tnamelen; 1752 struct ucred *cred; 1753 struct proc *proc; 1754 { 1755 u_int32_t *tl; 1756 caddr_t cp; 1757 int32_t t1, t2; 1758 caddr_t bpos, dpos, cp2; 1759 int error = 0, fwccflag = NFSV3_WCCRATTR, twccflag = NFSV3_WCCRATTR; 1760 struct mbuf *mreq, *mrep, *md, *mb; 1761 const int v3 = NFS_ISV3(fdvp); 1762 1763 nfsstats.rpccnt[NFSPROC_RENAME]++; 1764 nfsm_reqhead(fdvp, NFSPROC_RENAME, 1765 (NFSX_FH(v3) + NFSX_UNSIGNED)*2 + nfsm_rndup(fnamelen) + 1766 nfsm_rndup(tnamelen)); 1767 nfsm_fhtom(fdvp, v3); 1768 nfsm_strtom(fnameptr, fnamelen, NFS_MAXNAMLEN); 1769 nfsm_fhtom(tdvp, v3); 1770 nfsm_strtom(tnameptr, tnamelen, NFS_MAXNAMLEN); 1771 nfsm_request(fdvp, NFSPROC_RENAME, proc, cred); 1772 if (v3) { 1773 nfsm_wcc_data(fdvp, fwccflag, 0); 1774 nfsm_wcc_data(tdvp, twccflag, 0); 1775 } 1776 nfsm_reqdone; 1777 VTONFS(fdvp)->n_flag |= NMODIFIED; 1778 VTONFS(tdvp)->n_flag |= NMODIFIED; 1779 if (!fwccflag) 1780 VTONFS(fdvp)->n_attrstamp = 0; 1781 if (!twccflag) 1782 VTONFS(tdvp)->n_attrstamp = 0; 1783 return (error); 1784 } 1785 1786 /* 1787 * nfs hard link create call 1788 */ 1789 int 1790 nfs_link(v) 1791 void *v; 1792 { 1793 struct vop_link_args /* { 1794 struct vnode *a_dvp; 1795 struct vnode *a_vp; 1796 struct componentname *a_cnp; 1797 } */ *ap = v; 1798 struct vnode *vp = ap->a_vp; 1799 struct vnode *dvp = ap->a_dvp; 1800 struct componentname *cnp = ap->a_cnp; 1801 u_int32_t *tl; 1802 caddr_t cp; 1803 int32_t t1, t2; 1804 caddr_t bpos, dpos, cp2; 1805 int error = 0, wccflag = NFSV3_WCCRATTR, attrflag = 0; 1806 struct mbuf *mreq, *mrep, *md, *mb; 1807 /* XXX Should be const and initialised? */ 1808 int v3; 1809 1810 if (dvp->v_mount != vp->v_mount) { 1811 VOP_ABORTOP(dvp, cnp); 1812 vput(dvp); 1813 return (EXDEV); 1814 } 1815 if (dvp != vp) { 1816 error = vn_lock(vp, LK_EXCLUSIVE); 1817 if (error != 0) { 1818 VOP_ABORTOP(dvp, cnp); 1819 vput(dvp); 1820 return error; 1821 } 1822 } 1823 1824 /* 1825 * Push all writes to the server, so that the attribute cache 1826 * doesn't get "out of sync" with the server. 1827 * XXX There should be a better way! 1828 */ 1829 VOP_FSYNC(vp, cnp->cn_cred, FSYNC_WAIT, 0, 0, cnp->cn_proc); 1830 1831 v3 = NFS_ISV3(vp); 1832 nfsstats.rpccnt[NFSPROC_LINK]++; 1833 nfsm_reqhead(vp, NFSPROC_LINK, 1834 NFSX_FH(v3)*2 + NFSX_UNSIGNED + nfsm_rndup(cnp->cn_namelen)); 1835 nfsm_fhtom(vp, v3); 1836 nfsm_fhtom(dvp, v3); 1837 nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN); 1838 nfsm_request(vp, NFSPROC_LINK, cnp->cn_proc, cnp->cn_cred); 1839 if (v3) { 1840 nfsm_postop_attr(vp, attrflag, 0); 1841 nfsm_wcc_data(dvp, wccflag, 0); 1842 } 1843 nfsm_reqdone; 1844 PNBUF_PUT(cnp->cn_pnbuf); 1845 VTONFS(dvp)->n_flag |= NMODIFIED; 1846 if (!attrflag) 1847 VTONFS(vp)->n_attrstamp = 0; 1848 if (!wccflag) 1849 VTONFS(dvp)->n_attrstamp = 0; 1850 if (dvp != vp) 1851 VOP_UNLOCK(vp, 0); 1852 VN_KNOTE(vp, NOTE_LINK); 1853 VN_KNOTE(dvp, NOTE_WRITE); 1854 vput(dvp); 1855 /* 1856 * Kludge: Map EEXIST => 0 assuming that it is a reply to a retry. 1857 */ 1858 if (error == EEXIST) 1859 error = 0; 1860 return (error); 1861 } 1862 1863 /* 1864 * nfs symbolic link create call 1865 */ 1866 int 1867 nfs_symlink(v) 1868 void *v; 1869 { 1870 struct vop_symlink_args /* { 1871 struct vnode *a_dvp; 1872 struct vnode **a_vpp; 1873 struct componentname *a_cnp; 1874 struct vattr *a_vap; 1875 char *a_target; 1876 } */ *ap = v; 1877 struct vnode *dvp = ap->a_dvp; 1878 struct vattr *vap = ap->a_vap; 1879 struct componentname *cnp = ap->a_cnp; 1880 struct nfsv2_sattr *sp; 1881 u_int32_t *tl; 1882 caddr_t cp; 1883 int32_t t1, t2; 1884 caddr_t bpos, dpos, cp2; 1885 int slen, error = 0, wccflag = NFSV3_WCCRATTR, gotvp; 1886 struct mbuf *mreq, *mrep, *md, *mb; 1887 struct vnode *newvp = (struct vnode *)0; 1888 const int v3 = NFS_ISV3(dvp); 1889 1890 *ap->a_vpp = NULL; 1891 nfsstats.rpccnt[NFSPROC_SYMLINK]++; 1892 slen = strlen(ap->a_target); 1893 nfsm_reqhead(dvp, NFSPROC_SYMLINK, NFSX_FH(v3) + 2*NFSX_UNSIGNED + 1894 nfsm_rndup(cnp->cn_namelen) + nfsm_rndup(slen) + NFSX_SATTR(v3)); 1895 nfsm_fhtom(dvp, v3); 1896 nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN); 1897 if (v3) 1898 nfsm_v3attrbuild(vap, FALSE); 1899 nfsm_strtom(ap->a_target, slen, NFS_MAXPATHLEN); 1900 if (!v3) { 1901 nfsm_build(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 1902 sp->sa_mode = vtonfsv2_mode(VLNK, vap->va_mode); 1903 sp->sa_uid = nfs_xdrneg1; 1904 sp->sa_gid = nfs_xdrneg1; 1905 sp->sa_size = nfs_xdrneg1; 1906 txdr_nfsv2time(&vap->va_atime, &sp->sa_atime); 1907 txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime); 1908 } 1909 nfsm_request(dvp, NFSPROC_SYMLINK, cnp->cn_proc, cnp->cn_cred); 1910 if (v3) { 1911 if (!error) 1912 nfsm_mtofh(dvp, newvp, v3, gotvp); 1913 nfsm_wcc_data(dvp, wccflag, 0); 1914 } 1915 nfsm_reqdone; 1916 /* 1917 * Kludge: Map EEXIST => 0 assuming that it is a reply to a retry. 1918 */ 1919 if (error == EEXIST) 1920 error = 0; 1921 if (error == 0 && newvp == NULL) { 1922 struct nfsnode *np = NULL; 1923 1924 error = nfs_lookitup(dvp, cnp->cn_nameptr, cnp->cn_namelen, 1925 cnp->cn_cred, cnp->cn_proc, &np); 1926 if (error == 0) 1927 newvp = NFSTOV(np); 1928 } 1929 if (error) { 1930 if (newvp != NULL) 1931 vput(newvp); 1932 } else { 1933 *ap->a_vpp = newvp; 1934 } 1935 PNBUF_PUT(cnp->cn_pnbuf); 1936 VTONFS(dvp)->n_flag |= NMODIFIED; 1937 if (!wccflag) 1938 VTONFS(dvp)->n_attrstamp = 0; 1939 VN_KNOTE(dvp, NOTE_WRITE); 1940 vput(dvp); 1941 return (error); 1942 } 1943 1944 /* 1945 * nfs make dir call 1946 */ 1947 int 1948 nfs_mkdir(v) 1949 void *v; 1950 { 1951 struct vop_mkdir_args /* { 1952 struct vnode *a_dvp; 1953 struct vnode **a_vpp; 1954 struct componentname *a_cnp; 1955 struct vattr *a_vap; 1956 } */ *ap = v; 1957 struct vnode *dvp = ap->a_dvp; 1958 struct vattr *vap = ap->a_vap; 1959 struct componentname *cnp = ap->a_cnp; 1960 struct nfsv2_sattr *sp; 1961 u_int32_t *tl; 1962 caddr_t cp; 1963 int32_t t1, t2; 1964 int len; 1965 struct nfsnode *np = (struct nfsnode *)0; 1966 struct vnode *newvp = (struct vnode *)0; 1967 caddr_t bpos, dpos, cp2; 1968 int error = 0, wccflag = NFSV3_WCCRATTR; 1969 int gotvp = 0; 1970 struct mbuf *mreq, *mrep, *md, *mb; 1971 const int v3 = NFS_ISV3(dvp); 1972 1973 len = cnp->cn_namelen; 1974 nfsstats.rpccnt[NFSPROC_MKDIR]++; 1975 nfsm_reqhead(dvp, NFSPROC_MKDIR, 1976 NFSX_FH(v3) + NFSX_UNSIGNED + nfsm_rndup(len) + NFSX_SATTR(v3)); 1977 nfsm_fhtom(dvp, v3); 1978 nfsm_strtom(cnp->cn_nameptr, len, NFS_MAXNAMLEN); 1979 if (v3) { 1980 nfsm_v3attrbuild(vap, FALSE); 1981 } else { 1982 nfsm_build(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 1983 sp->sa_mode = vtonfsv2_mode(VDIR, vap->va_mode); 1984 sp->sa_uid = nfs_xdrneg1; 1985 sp->sa_gid = nfs_xdrneg1; 1986 sp->sa_size = nfs_xdrneg1; 1987 txdr_nfsv2time(&vap->va_atime, &sp->sa_atime); 1988 txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime); 1989 } 1990 nfsm_request(dvp, NFSPROC_MKDIR, cnp->cn_proc, cnp->cn_cred); 1991 if (!error) 1992 nfsm_mtofh(dvp, newvp, v3, gotvp); 1993 if (v3) 1994 nfsm_wcc_data(dvp, wccflag, 0); 1995 nfsm_reqdone; 1996 VTONFS(dvp)->n_flag |= NMODIFIED; 1997 if (!wccflag) 1998 VTONFS(dvp)->n_attrstamp = 0; 1999 /* 2000 * Kludge: Map EEXIST => 0 assuming that you have a reply to a retry 2001 * if we can succeed in looking up the directory. 2002 */ 2003 if (error == EEXIST || (!error && !gotvp)) { 2004 if (newvp) { 2005 vput(newvp); 2006 newvp = (struct vnode *)0; 2007 } 2008 error = nfs_lookitup(dvp, cnp->cn_nameptr, len, cnp->cn_cred, 2009 cnp->cn_proc, &np); 2010 if (!error) { 2011 newvp = NFSTOV(np); 2012 if (newvp->v_type != VDIR) 2013 error = EEXIST; 2014 } 2015 } 2016 if (error) { 2017 if (newvp) 2018 vput(newvp); 2019 } else { 2020 VN_KNOTE(dvp, NOTE_WRITE | NOTE_LINK); 2021 if (cnp->cn_flags & MAKEENTRY) 2022 cache_enter(dvp, newvp, cnp); 2023 *ap->a_vpp = newvp; 2024 } 2025 PNBUF_PUT(cnp->cn_pnbuf); 2026 vput(dvp); 2027 return (error); 2028 } 2029 2030 /* 2031 * nfs remove directory call 2032 */ 2033 int 2034 nfs_rmdir(v) 2035 void *v; 2036 { 2037 struct vop_rmdir_args /* { 2038 struct vnode *a_dvp; 2039 struct vnode *a_vp; 2040 struct componentname *a_cnp; 2041 } */ *ap = v; 2042 struct vnode *vp = ap->a_vp; 2043 struct vnode *dvp = ap->a_dvp; 2044 struct componentname *cnp = ap->a_cnp; 2045 u_int32_t *tl; 2046 caddr_t cp; 2047 int32_t t1, t2; 2048 caddr_t bpos, dpos, cp2; 2049 int error = 0, wccflag = NFSV3_WCCRATTR; 2050 struct mbuf *mreq, *mrep, *md, *mb; 2051 const int v3 = NFS_ISV3(dvp); 2052 2053 if (dvp == vp) { 2054 vrele(dvp); 2055 vput(dvp); 2056 PNBUF_PUT(cnp->cn_pnbuf); 2057 return (EINVAL); 2058 } 2059 nfsstats.rpccnt[NFSPROC_RMDIR]++; 2060 nfsm_reqhead(dvp, NFSPROC_RMDIR, 2061 NFSX_FH(v3) + NFSX_UNSIGNED + nfsm_rndup(cnp->cn_namelen)); 2062 nfsm_fhtom(dvp, v3); 2063 nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN); 2064 nfsm_request(dvp, NFSPROC_RMDIR, cnp->cn_proc, cnp->cn_cred); 2065 if (v3) 2066 nfsm_wcc_data(dvp, wccflag, 0); 2067 nfsm_reqdone; 2068 PNBUF_PUT(cnp->cn_pnbuf); 2069 VTONFS(dvp)->n_flag |= NMODIFIED; 2070 if (!wccflag) 2071 VTONFS(dvp)->n_attrstamp = 0; 2072 VN_KNOTE(dvp, NOTE_WRITE | NOTE_LINK); 2073 VN_KNOTE(vp, NOTE_DELETE); 2074 cache_purge(dvp); 2075 cache_purge(vp); 2076 vput(vp); 2077 vput(dvp); 2078 /* 2079 * Kludge: Map ENOENT => 0 assuming that you have a reply to a retry. 2080 */ 2081 if (error == ENOENT) 2082 error = 0; 2083 return (error); 2084 } 2085 2086 /* 2087 * nfs readdir call 2088 */ 2089 int 2090 nfs_readdir(v) 2091 void *v; 2092 { 2093 struct vop_readdir_args /* { 2094 struct vnode *a_vp; 2095 struct uio *a_uio; 2096 struct ucred *a_cred; 2097 int *a_eofflag; 2098 off_t **a_cookies; 2099 int *a_ncookies; 2100 } */ *ap = v; 2101 struct vnode *vp = ap->a_vp; 2102 struct uio *uio = ap->a_uio; 2103 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 2104 char *base = uio->uio_iov->iov_base; 2105 int tresid, error; 2106 size_t count, lost; 2107 struct dirent *dp; 2108 off_t *cookies = NULL; 2109 int ncookies = 0, nc; 2110 2111 if (vp->v_type != VDIR) 2112 return (EPERM); 2113 2114 lost = uio->uio_resid & (NFS_DIRFRAGSIZ - 1); 2115 count = uio->uio_resid - lost; 2116 if (count <= 0) 2117 return (EINVAL); 2118 2119 /* 2120 * Call nfs_bioread() to do the real work. 2121 */ 2122 tresid = uio->uio_resid = count; 2123 error = nfs_bioread(vp, uio, 0, ap->a_cred, 2124 ap->a_cookies ? NFSBIO_CACHECOOKIES : 0); 2125 2126 if (!error && ap->a_cookies) { 2127 ncookies = count / 16; 2128 cookies = malloc(sizeof (off_t) * ncookies, M_TEMP, M_WAITOK); 2129 *ap->a_cookies = cookies; 2130 } 2131 2132 if (!error && uio->uio_resid == tresid) { 2133 uio->uio_resid += lost; 2134 nfsstats.direofcache_misses++; 2135 if (ap->a_cookies) 2136 *ap->a_ncookies = 0; 2137 *ap->a_eofflag = 1; 2138 return (0); 2139 } 2140 2141 if (!error && ap->a_cookies) { 2142 /* 2143 * Only the NFS server and emulations use cookies, and they 2144 * load the directory block into system space, so we can 2145 * just look at it directly. 2146 */ 2147 if (uio->uio_segflg != UIO_SYSSPACE || uio->uio_iovcnt != 1) 2148 panic("nfs_readdir: lost in space"); 2149 for (nc = 0; ncookies-- && 2150 base < (char *)uio->uio_iov->iov_base; nc++){ 2151 dp = (struct dirent *) base; 2152 if (dp->d_reclen == 0) 2153 break; 2154 if (nmp->nm_flag & NFSMNT_XLATECOOKIE) 2155 *(cookies++) = (off_t)NFS_GETCOOKIE32(dp); 2156 else 2157 *(cookies++) = NFS_GETCOOKIE(dp); 2158 base += dp->d_reclen; 2159 } 2160 uio->uio_resid += 2161 ((caddr_t)uio->uio_iov->iov_base - base); 2162 uio->uio_iov->iov_len += 2163 ((caddr_t)uio->uio_iov->iov_base - base); 2164 uio->uio_iov->iov_base = base; 2165 *ap->a_ncookies = nc; 2166 } 2167 2168 uio->uio_resid += lost; 2169 *ap->a_eofflag = 0; 2170 return (error); 2171 } 2172 2173 /* 2174 * Readdir rpc call. 2175 * Called from below the buffer cache by nfs_doio(). 2176 */ 2177 int 2178 nfs_readdirrpc(vp, uiop, cred) 2179 struct vnode *vp; 2180 struct uio *uiop; 2181 struct ucred *cred; 2182 { 2183 int len, left; 2184 struct dirent *dp = NULL; 2185 u_int32_t *tl; 2186 caddr_t cp; 2187 int32_t t1, t2; 2188 caddr_t bpos, dpos, cp2; 2189 struct mbuf *mreq, *mrep, *md, *mb; 2190 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 2191 struct nfsnode *dnp = VTONFS(vp); 2192 u_quad_t fileno; 2193 int error = 0, tlen, more_dirs = 1, blksiz = 0, bigenough = 1; 2194 int attrflag, nrpcs = 0, reclen; 2195 const int v3 = NFS_ISV3(vp); 2196 2197 #ifdef DIAGNOSTIC 2198 /* 2199 * Should be called from buffer cache, so only amount of 2200 * NFS_DIRBLKSIZ will be requested. 2201 */ 2202 if (uiop->uio_iovcnt != 1 || (uiop->uio_resid & (NFS_DIRBLKSIZ - 1))) 2203 panic("nfs readdirrpc bad uio"); 2204 #endif 2205 2206 /* 2207 * Loop around doing readdir rpc's of size nm_readdirsize 2208 * truncated to a multiple of NFS_DIRFRAGSIZ. 2209 * The stopping criteria is EOF or buffer full. 2210 */ 2211 while (more_dirs && bigenough) { 2212 /* 2213 * Heuristic: don't bother to do another RPC to further 2214 * fill up this block if there is not much room left. (< 50% 2215 * of the readdir RPC size). This wastes some buffer space 2216 * but can save up to 50% in RPC calls. 2217 */ 2218 if (nrpcs > 0 && uiop->uio_resid < (nmp->nm_readdirsize / 2)) { 2219 bigenough = 0; 2220 break; 2221 } 2222 nfsstats.rpccnt[NFSPROC_READDIR]++; 2223 nfsm_reqhead(vp, NFSPROC_READDIR, NFSX_FH(v3) + 2224 NFSX_READDIR(v3)); 2225 nfsm_fhtom(vp, v3); 2226 if (v3) { 2227 nfsm_build(tl, u_int32_t *, 5 * NFSX_UNSIGNED); 2228 if (nmp->nm_iflag & NFSMNT_SWAPCOOKIE) { 2229 txdr_swapcookie3(uiop->uio_offset, tl); 2230 } else { 2231 txdr_cookie3(uiop->uio_offset, tl); 2232 } 2233 tl += 2; 2234 *tl++ = dnp->n_cookieverf.nfsuquad[0]; 2235 *tl++ = dnp->n_cookieverf.nfsuquad[1]; 2236 } else { 2237 nfsm_build(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 2238 *tl++ = txdr_unsigned(uiop->uio_offset); 2239 } 2240 *tl = txdr_unsigned(nmp->nm_readdirsize); 2241 nfsm_request(vp, NFSPROC_READDIR, uiop->uio_procp, cred); 2242 nrpcs++; 2243 if (v3) { 2244 nfsm_postop_attr(vp, attrflag, 0); 2245 if (!error) { 2246 nfsm_dissect(tl, u_int32_t *, 2247 2 * NFSX_UNSIGNED); 2248 dnp->n_cookieverf.nfsuquad[0] = *tl++; 2249 dnp->n_cookieverf.nfsuquad[1] = *tl; 2250 } else { 2251 m_freem(mrep); 2252 goto nfsmout; 2253 } 2254 } 2255 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 2256 more_dirs = fxdr_unsigned(int, *tl); 2257 2258 /* loop thru the dir entries, doctoring them to 4bsd form */ 2259 while (more_dirs && bigenough) { 2260 if (v3) { 2261 nfsm_dissect(tl, u_int32_t *, 2262 3 * NFSX_UNSIGNED); 2263 fileno = fxdr_hyper(tl); 2264 len = fxdr_unsigned(int, *(tl + 2)); 2265 } else { 2266 nfsm_dissect(tl, u_int32_t *, 2267 2 * NFSX_UNSIGNED); 2268 fileno = fxdr_unsigned(u_quad_t, *tl++); 2269 len = fxdr_unsigned(int, *tl); 2270 } 2271 if (len <= 0 || len > NFS_MAXNAMLEN) { 2272 error = EBADRPC; 2273 m_freem(mrep); 2274 goto nfsmout; 2275 } 2276 tlen = nfsm_rndup(len); 2277 if (tlen == len) 2278 tlen += 4; /* To ensure null termination */ 2279 tlen += sizeof (off_t) + sizeof (int); 2280 reclen = ALIGN(tlen + DIRHDSIZ); 2281 tlen = reclen - DIRHDSIZ; 2282 left = NFS_DIRFRAGSIZ - blksiz; 2283 if (reclen > left) { 2284 dp->d_reclen += left; 2285 uiop->uio_iov->iov_base = 2286 (caddr_t)uiop->uio_iov->iov_base + left; 2287 uiop->uio_iov->iov_len -= left; 2288 uiop->uio_resid -= left; 2289 blksiz = 0; 2290 NFS_STASHCOOKIE(dp, uiop->uio_offset); 2291 } 2292 if (reclen > uiop->uio_resid) 2293 bigenough = 0; 2294 if (bigenough) { 2295 dp = (struct dirent *)uiop->uio_iov->iov_base; 2296 dp->d_fileno = (int)fileno; 2297 dp->d_namlen = len; 2298 dp->d_reclen = reclen; 2299 dp->d_type = DT_UNKNOWN; 2300 blksiz += dp->d_reclen; 2301 if (blksiz == NFS_DIRFRAGSIZ) 2302 blksiz = 0; 2303 uiop->uio_resid -= DIRHDSIZ; 2304 uiop->uio_iov->iov_base = 2305 (caddr_t)uiop->uio_iov->iov_base + DIRHDSIZ; 2306 uiop->uio_iov->iov_len -= DIRHDSIZ; 2307 nfsm_mtouio(uiop, len); 2308 cp = uiop->uio_iov->iov_base; 2309 tlen -= len; 2310 *cp = '\0'; /* null terminate */ 2311 uiop->uio_iov->iov_base = 2312 (caddr_t)uiop->uio_iov->iov_base + tlen; 2313 uiop->uio_iov->iov_len -= tlen; 2314 uiop->uio_resid -= tlen; 2315 } else 2316 nfsm_adv(nfsm_rndup(len)); 2317 if (v3) { 2318 nfsm_dissect(tl, u_int32_t *, 2319 3 * NFSX_UNSIGNED); 2320 } else { 2321 nfsm_dissect(tl, u_int32_t *, 2322 2 * NFSX_UNSIGNED); 2323 } 2324 if (bigenough) { 2325 if (v3) { 2326 if (nmp->nm_iflag & NFSMNT_SWAPCOOKIE) 2327 uiop->uio_offset = 2328 fxdr_swapcookie3(tl); 2329 else 2330 uiop->uio_offset = 2331 fxdr_cookie3(tl); 2332 } 2333 else { 2334 uiop->uio_offset = 2335 fxdr_unsigned(off_t, *tl); 2336 } 2337 NFS_STASHCOOKIE(dp, uiop->uio_offset); 2338 } 2339 if (v3) 2340 tl += 2; 2341 else 2342 tl++; 2343 more_dirs = fxdr_unsigned(int, *tl); 2344 } 2345 /* 2346 * If at end of rpc data, get the eof boolean 2347 */ 2348 if (!more_dirs) { 2349 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 2350 more_dirs = (fxdr_unsigned(int, *tl) == 0); 2351 } 2352 m_freem(mrep); 2353 } 2354 /* 2355 * Fill last record, iff any, out to a multiple of NFS_DIRFRAGSIZ 2356 * by increasing d_reclen for the last record. 2357 */ 2358 if (blksiz > 0) { 2359 left = NFS_DIRFRAGSIZ - blksiz; 2360 dp->d_reclen += left; 2361 NFS_STASHCOOKIE(dp, uiop->uio_offset); 2362 uiop->uio_iov->iov_base = (caddr_t)uiop->uio_iov->iov_base + 2363 left; 2364 uiop->uio_iov->iov_len -= left; 2365 uiop->uio_resid -= left; 2366 } 2367 2368 /* 2369 * We are now either at the end of the directory or have filled the 2370 * block. 2371 */ 2372 if (bigenough) 2373 dnp->n_direofoffset = uiop->uio_offset; 2374 nfsmout: 2375 return (error); 2376 } 2377 2378 /* 2379 * NFS V3 readdir plus RPC. Used in place of nfs_readdirrpc(). 2380 */ 2381 int 2382 nfs_readdirplusrpc(vp, uiop, cred) 2383 struct vnode *vp; 2384 struct uio *uiop; 2385 struct ucred *cred; 2386 { 2387 int len, left; 2388 struct dirent *dp = NULL; 2389 u_int32_t *tl; 2390 caddr_t cp; 2391 int32_t t1, t2; 2392 struct vnode *newvp; 2393 caddr_t bpos, dpos, cp2; 2394 struct mbuf *mreq, *mrep, *md, *mb; 2395 struct nameidata nami, *ndp = &nami; 2396 struct componentname *cnp = &ndp->ni_cnd; 2397 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 2398 struct nfsnode *dnp = VTONFS(vp), *np; 2399 nfsfh_t *fhp; 2400 u_quad_t fileno; 2401 int error = 0, tlen, more_dirs = 1, blksiz = 0, doit, bigenough = 1, i; 2402 int attrflag, fhsize, nrpcs = 0, reclen; 2403 struct nfs_fattr fattr, *fp; 2404 2405 #ifdef DIAGNOSTIC 2406 if (uiop->uio_iovcnt != 1 || (uiop->uio_resid & (NFS_DIRBLKSIZ - 1))) 2407 panic("nfs readdirplusrpc bad uio"); 2408 #endif 2409 ndp->ni_dvp = vp; 2410 newvp = NULLVP; 2411 2412 /* 2413 * Loop around doing readdir rpc's of size nm_readdirsize 2414 * truncated to a multiple of NFS_DIRFRAGSIZ. 2415 * The stopping criteria is EOF or buffer full. 2416 */ 2417 while (more_dirs && bigenough) { 2418 if (nrpcs > 0 && uiop->uio_resid < (nmp->nm_readdirsize / 2)) { 2419 bigenough = 0; 2420 break; 2421 } 2422 nfsstats.rpccnt[NFSPROC_READDIRPLUS]++; 2423 nfsm_reqhead(vp, NFSPROC_READDIRPLUS, 2424 NFSX_FH(1) + 6 * NFSX_UNSIGNED); 2425 nfsm_fhtom(vp, 1); 2426 nfsm_build(tl, u_int32_t *, 6 * NFSX_UNSIGNED); 2427 if (nmp->nm_iflag & NFSMNT_SWAPCOOKIE) { 2428 txdr_swapcookie3(uiop->uio_offset, tl); 2429 } else { 2430 txdr_cookie3(uiop->uio_offset, tl); 2431 } 2432 tl += 2; 2433 *tl++ = dnp->n_cookieverf.nfsuquad[0]; 2434 *tl++ = dnp->n_cookieverf.nfsuquad[1]; 2435 *tl++ = txdr_unsigned(nmp->nm_readdirsize); 2436 *tl = txdr_unsigned(nmp->nm_rsize); 2437 nfsm_request(vp, NFSPROC_READDIRPLUS, uiop->uio_procp, cred); 2438 nfsm_postop_attr(vp, attrflag, 0); 2439 if (error) { 2440 m_freem(mrep); 2441 goto nfsmout; 2442 } 2443 nrpcs++; 2444 nfsm_dissect(tl, u_int32_t *, 3 * NFSX_UNSIGNED); 2445 dnp->n_cookieverf.nfsuquad[0] = *tl++; 2446 dnp->n_cookieverf.nfsuquad[1] = *tl++; 2447 more_dirs = fxdr_unsigned(int, *tl); 2448 2449 /* loop thru the dir entries, doctoring them to 4bsd form */ 2450 while (more_dirs && bigenough) { 2451 nfsm_dissect(tl, u_int32_t *, 3 * NFSX_UNSIGNED); 2452 fileno = fxdr_hyper(tl); 2453 len = fxdr_unsigned(int, *(tl + 2)); 2454 if (len <= 0 || len > NFS_MAXNAMLEN) { 2455 error = EBADRPC; 2456 m_freem(mrep); 2457 goto nfsmout; 2458 } 2459 tlen = nfsm_rndup(len); 2460 if (tlen == len) 2461 tlen += 4; /* To ensure null termination*/ 2462 tlen += sizeof (off_t) + sizeof (int); 2463 reclen = ALIGN(tlen + DIRHDSIZ); 2464 tlen = reclen - DIRHDSIZ; 2465 left = NFS_DIRFRAGSIZ - blksiz; 2466 if (reclen > left) { 2467 /* 2468 * DIRFRAGSIZ is aligned, no need to align 2469 * again here. 2470 */ 2471 dp->d_reclen += left; 2472 uiop->uio_iov->iov_base = 2473 (caddr_t)uiop->uio_iov->iov_base + left; 2474 uiop->uio_iov->iov_len -= left; 2475 uiop->uio_resid -= left; 2476 NFS_STASHCOOKIE(dp, uiop->uio_offset); 2477 blksiz = 0; 2478 } 2479 if (reclen > uiop->uio_resid) 2480 bigenough = 0; 2481 if (bigenough) { 2482 dp = (struct dirent *)uiop->uio_iov->iov_base; 2483 dp->d_fileno = (int)fileno; 2484 dp->d_namlen = len; 2485 dp->d_reclen = reclen; 2486 dp->d_type = DT_UNKNOWN; 2487 blksiz += dp->d_reclen; 2488 if (blksiz == NFS_DIRFRAGSIZ) 2489 blksiz = 0; 2490 uiop->uio_resid -= DIRHDSIZ; 2491 uiop->uio_iov->iov_base = 2492 (caddr_t)uiop->uio_iov->iov_base + 2493 DIRHDSIZ; 2494 uiop->uio_iov->iov_len -= DIRHDSIZ; 2495 cnp->cn_nameptr = uiop->uio_iov->iov_base; 2496 cnp->cn_namelen = len; 2497 nfsm_mtouio(uiop, len); 2498 cp = uiop->uio_iov->iov_base; 2499 tlen -= len; 2500 *cp = '\0'; 2501 uiop->uio_iov->iov_base = 2502 (caddr_t)uiop->uio_iov->iov_base + tlen; 2503 uiop->uio_iov->iov_len -= tlen; 2504 uiop->uio_resid -= tlen; 2505 } else 2506 nfsm_adv(nfsm_rndup(len)); 2507 nfsm_dissect(tl, u_int32_t *, 3 * NFSX_UNSIGNED); 2508 if (bigenough) { 2509 if (nmp->nm_iflag & NFSMNT_SWAPCOOKIE) 2510 uiop->uio_offset = 2511 fxdr_swapcookie3(tl); 2512 else 2513 uiop->uio_offset = 2514 fxdr_cookie3(tl); 2515 NFS_STASHCOOKIE(dp, uiop->uio_offset); 2516 } 2517 tl += 2; 2518 2519 /* 2520 * Since the attributes are before the file handle 2521 * (sigh), we must skip over the attributes and then 2522 * come back and get them. 2523 */ 2524 attrflag = fxdr_unsigned(int, *tl); 2525 if (attrflag) { 2526 nfsm_dissect(fp, struct nfs_fattr *, NFSX_V3FATTR); 2527 memcpy(&fattr, fp, NFSX_V3FATTR); 2528 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 2529 doit = fxdr_unsigned(int, *tl); 2530 if (doit) { 2531 nfsm_getfh(fhp, fhsize, 1); 2532 if (NFS_CMPFH(dnp, fhp, fhsize)) { 2533 VREF(vp); 2534 newvp = vp; 2535 np = dnp; 2536 } else { 2537 error = nfs_nget(vp->v_mount, fhp, 2538 fhsize, &np); 2539 if (!error) 2540 newvp = NFSTOV(np); 2541 } 2542 if (!error) { 2543 const char *cp; 2544 2545 nfs_loadattrcache(&newvp, &fattr, 0, 0); 2546 dp->d_type = 2547 IFTODT(VTTOIF(np->n_vattr->va_type)); 2548 ndp->ni_vp = newvp; 2549 cp = cnp->cn_nameptr + cnp->cn_namelen; 2550 cnp->cn_hash = 2551 namei_hash(cnp->cn_nameptr, &cp); 2552 if (cnp->cn_namelen <= NCHNAMLEN) 2553 cache_enter(ndp->ni_dvp, ndp->ni_vp, 2554 cnp); 2555 } 2556 } 2557 } else { 2558 /* Just skip over the file handle */ 2559 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 2560 i = fxdr_unsigned(int, *tl); 2561 nfsm_adv(nfsm_rndup(i)); 2562 } 2563 if (newvp != NULLVP) { 2564 if (newvp == vp) 2565 vrele(newvp); 2566 else 2567 vput(newvp); 2568 newvp = NULLVP; 2569 } 2570 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 2571 more_dirs = fxdr_unsigned(int, *tl); 2572 } 2573 /* 2574 * If at end of rpc data, get the eof boolean 2575 */ 2576 if (!more_dirs) { 2577 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 2578 more_dirs = (fxdr_unsigned(int, *tl) == 0); 2579 } 2580 m_freem(mrep); 2581 } 2582 /* 2583 * Fill last record, iff any, out to a multiple of NFS_DIRFRAGSIZ 2584 * by increasing d_reclen for the last record. 2585 */ 2586 if (blksiz > 0) { 2587 left = NFS_DIRFRAGSIZ - blksiz; 2588 dp->d_reclen += left; 2589 NFS_STASHCOOKIE(dp, uiop->uio_offset); 2590 uiop->uio_iov->iov_base = (caddr_t)uiop->uio_iov->iov_base + 2591 left; 2592 uiop->uio_iov->iov_len -= left; 2593 uiop->uio_resid -= left; 2594 } 2595 2596 /* 2597 * We are now either at the end of the directory or have filled the 2598 * block. 2599 */ 2600 if (bigenough) 2601 dnp->n_direofoffset = uiop->uio_offset; 2602 nfsmout: 2603 if (newvp != NULLVP) { 2604 if(newvp == vp) 2605 vrele(newvp); 2606 else 2607 vput(newvp); 2608 } 2609 return (error); 2610 } 2611 static char hextoasc[] = "0123456789abcdef"; 2612 2613 /* 2614 * Silly rename. To make the NFS filesystem that is stateless look a little 2615 * more like the "ufs" a remove of an active vnode is translated to a rename 2616 * to a funny looking filename that is removed by nfs_inactive on the 2617 * nfsnode. There is the potential for another process on a different client 2618 * to create the same funny name between the nfs_lookitup() fails and the 2619 * nfs_rename() completes, but... 2620 */ 2621 int 2622 nfs_sillyrename(dvp, vp, cnp) 2623 struct vnode *dvp, *vp; 2624 struct componentname *cnp; 2625 { 2626 struct sillyrename *sp; 2627 struct nfsnode *np; 2628 int error; 2629 short pid; 2630 2631 cache_purge(dvp); 2632 np = VTONFS(vp); 2633 #ifndef DIAGNOSTIC 2634 if (vp->v_type == VDIR) 2635 panic("nfs: sillyrename dir"); 2636 #endif 2637 MALLOC(sp, struct sillyrename *, sizeof (struct sillyrename), 2638 M_NFSREQ, M_WAITOK); 2639 sp->s_cred = crdup(cnp->cn_cred); 2640 sp->s_dvp = dvp; 2641 VREF(dvp); 2642 2643 /* Fudge together a funny name */ 2644 pid = cnp->cn_proc->p_pid; 2645 memcpy(sp->s_name, ".nfsAxxxx4.4", 13); 2646 sp->s_namlen = 12; 2647 sp->s_name[8] = hextoasc[pid & 0xf]; 2648 sp->s_name[7] = hextoasc[(pid >> 4) & 0xf]; 2649 sp->s_name[6] = hextoasc[(pid >> 8) & 0xf]; 2650 sp->s_name[5] = hextoasc[(pid >> 12) & 0xf]; 2651 2652 /* Try lookitups until we get one that isn't there */ 2653 while (nfs_lookitup(dvp, sp->s_name, sp->s_namlen, sp->s_cred, 2654 cnp->cn_proc, (struct nfsnode **)0) == 0) { 2655 sp->s_name[4]++; 2656 if (sp->s_name[4] > 'z') { 2657 error = EINVAL; 2658 goto bad; 2659 } 2660 } 2661 error = nfs_renameit(dvp, cnp, sp); 2662 if (error) 2663 goto bad; 2664 error = nfs_lookitup(dvp, sp->s_name, sp->s_namlen, sp->s_cred, 2665 cnp->cn_proc, &np); 2666 np->n_sillyrename = sp; 2667 return (0); 2668 bad: 2669 vrele(sp->s_dvp); 2670 crfree(sp->s_cred); 2671 free((caddr_t)sp, M_NFSREQ); 2672 return (error); 2673 } 2674 2675 /* 2676 * Look up a file name and optionally either update the file handle or 2677 * allocate an nfsnode, depending on the value of npp. 2678 * npp == NULL --> just do the lookup 2679 * *npp == NULL --> allocate a new nfsnode and make sure attributes are 2680 * handled too 2681 * *npp != NULL --> update the file handle in the vnode 2682 */ 2683 int 2684 nfs_lookitup(dvp, name, len, cred, procp, npp) 2685 struct vnode *dvp; 2686 const char *name; 2687 int len; 2688 struct ucred *cred; 2689 struct proc *procp; 2690 struct nfsnode **npp; 2691 { 2692 u_int32_t *tl; 2693 caddr_t cp; 2694 int32_t t1, t2; 2695 struct vnode *newvp = (struct vnode *)0; 2696 struct nfsnode *np, *dnp = VTONFS(dvp); 2697 caddr_t bpos, dpos, cp2; 2698 int error = 0, fhlen, attrflag; 2699 struct mbuf *mreq, *mrep, *md, *mb; 2700 nfsfh_t *nfhp; 2701 const int v3 = NFS_ISV3(dvp); 2702 2703 nfsstats.rpccnt[NFSPROC_LOOKUP]++; 2704 nfsm_reqhead(dvp, NFSPROC_LOOKUP, 2705 NFSX_FH(v3) + NFSX_UNSIGNED + nfsm_rndup(len)); 2706 nfsm_fhtom(dvp, v3); 2707 nfsm_strtom(name, len, NFS_MAXNAMLEN); 2708 nfsm_request(dvp, NFSPROC_LOOKUP, procp, cred); 2709 if (npp && !error) { 2710 nfsm_getfh(nfhp, fhlen, v3); 2711 if (*npp) { 2712 np = *npp; 2713 if (np->n_fhsize > NFS_SMALLFH && fhlen <= NFS_SMALLFH) { 2714 free((caddr_t)np->n_fhp, M_NFSBIGFH); 2715 np->n_fhp = &np->n_fh; 2716 } else if (np->n_fhsize <= NFS_SMALLFH && fhlen>NFS_SMALLFH) 2717 np->n_fhp =(nfsfh_t *)malloc(fhlen,M_NFSBIGFH,M_WAITOK); 2718 memcpy((caddr_t)np->n_fhp, (caddr_t)nfhp, fhlen); 2719 np->n_fhsize = fhlen; 2720 newvp = NFSTOV(np); 2721 } else if (NFS_CMPFH(dnp, nfhp, fhlen)) { 2722 VREF(dvp); 2723 newvp = dvp; 2724 } else { 2725 error = nfs_nget(dvp->v_mount, nfhp, fhlen, &np); 2726 if (error) { 2727 m_freem(mrep); 2728 return (error); 2729 } 2730 newvp = NFSTOV(np); 2731 } 2732 if (v3) { 2733 nfsm_postop_attr(newvp, attrflag, 0); 2734 if (!attrflag && *npp == NULL) { 2735 m_freem(mrep); 2736 vput(newvp); 2737 return (ENOENT); 2738 } 2739 } else 2740 nfsm_loadattr(newvp, (struct vattr *)0, 0); 2741 } 2742 nfsm_reqdone; 2743 if (npp && *npp == NULL) { 2744 if (error) { 2745 if (newvp) 2746 vput(newvp); 2747 } else 2748 *npp = np; 2749 } 2750 return (error); 2751 } 2752 2753 /* 2754 * Nfs Version 3 commit rpc 2755 */ 2756 int 2757 nfs_commit(vp, offset, cnt, procp) 2758 struct vnode *vp; 2759 off_t offset; 2760 uint32_t cnt; 2761 struct proc *procp; 2762 { 2763 caddr_t cp; 2764 u_int32_t *tl; 2765 int32_t t1, t2; 2766 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 2767 caddr_t bpos, dpos, cp2; 2768 int error = 0, wccflag = NFSV3_WCCRATTR; 2769 struct mbuf *mreq, *mrep, *md, *mb; 2770 2771 #ifdef NFS_DEBUG_COMMIT 2772 printf("commit %lu - %lu\n", (unsigned long)offset, 2773 (unsigned long)(offset + cnt)); 2774 #endif 2775 2776 if ((nmp->nm_iflag & NFSMNT_HASWRITEVERF) == 0) 2777 return (0); 2778 nfsstats.rpccnt[NFSPROC_COMMIT]++; 2779 nfsm_reqhead(vp, NFSPROC_COMMIT, NFSX_FH(1)); 2780 nfsm_fhtom(vp, 1); 2781 nfsm_build(tl, u_int32_t *, 3 * NFSX_UNSIGNED); 2782 txdr_hyper(offset, tl); 2783 tl += 2; 2784 *tl = txdr_unsigned(cnt); 2785 nfsm_request(vp, NFSPROC_COMMIT, procp, VTONFS(vp)->n_wcred); 2786 nfsm_wcc_data(vp, wccflag, 0); 2787 if (!error) { 2788 nfsm_dissect(tl, u_int32_t *, NFSX_V3WRITEVERF); 2789 if (memcmp((caddr_t)nmp->nm_writeverf, (caddr_t)tl, 2790 NFSX_V3WRITEVERF)) { 2791 memcpy((caddr_t)nmp->nm_writeverf, (caddr_t)tl, 2792 NFSX_V3WRITEVERF); 2793 error = NFSERR_STALEWRITEVERF; 2794 } 2795 } 2796 nfsm_reqdone; 2797 return (error); 2798 } 2799 2800 /* 2801 * Kludge City.. 2802 * - make nfs_bmap() essentially a no-op that does no translation 2803 * - do nfs_strategy() by doing I/O with nfs_readrpc/nfs_writerpc 2804 * (Maybe I could use the process's page mapping, but I was concerned that 2805 * Kernel Write might not be enabled and also figured copyout() would do 2806 * a lot more work than memcpy() and also it currently happens in the 2807 * context of the swapper process (2). 2808 */ 2809 int 2810 nfs_bmap(v) 2811 void *v; 2812 { 2813 struct vop_bmap_args /* { 2814 struct vnode *a_vp; 2815 daddr_t a_bn; 2816 struct vnode **a_vpp; 2817 daddr_t *a_bnp; 2818 int *a_runp; 2819 } */ *ap = v; 2820 struct vnode *vp = ap->a_vp; 2821 int bshift = vp->v_mount->mnt_fs_bshift - vp->v_mount->mnt_dev_bshift; 2822 2823 if (ap->a_vpp != NULL) 2824 *ap->a_vpp = vp; 2825 if (ap->a_bnp != NULL) 2826 *ap->a_bnp = ap->a_bn << bshift; 2827 if (ap->a_runp != NULL) 2828 *ap->a_runp = 1024 * 1024; /* XXX */ 2829 return (0); 2830 } 2831 2832 /* 2833 * Strategy routine. 2834 * For async requests when nfsiod(s) are running, queue the request by 2835 * calling nfs_asyncio(), otherwise just all nfs_doio() to do the 2836 * request. 2837 */ 2838 int 2839 nfs_strategy(v) 2840 void *v; 2841 { 2842 struct vop_strategy_args *ap = v; 2843 struct buf *bp = ap->a_bp; 2844 struct proc *p; 2845 int error = 0; 2846 2847 if ((bp->b_flags & (B_PHYS|B_ASYNC)) == (B_PHYS|B_ASYNC)) 2848 panic("nfs physio/async"); 2849 if (bp->b_flags & B_ASYNC) 2850 p = NULL; 2851 else 2852 p = curproc; /* XXX */ 2853 2854 /* 2855 * If the op is asynchronous and an i/o daemon is waiting 2856 * queue the request, wake it up and wait for completion 2857 * otherwise just do it ourselves. 2858 */ 2859 2860 if ((bp->b_flags & B_ASYNC) == 0 || 2861 nfs_asyncio(bp)) 2862 error = nfs_doio(bp, p); 2863 return (error); 2864 } 2865 2866 /* 2867 * fsync vnode op. Just call nfs_flush() with commit == 1. 2868 */ 2869 /* ARGSUSED */ 2870 int 2871 nfs_fsync(v) 2872 void *v; 2873 { 2874 struct vop_fsync_args /* { 2875 struct vnodeop_desc *a_desc; 2876 struct vnode * a_vp; 2877 struct ucred * a_cred; 2878 int a_flags; 2879 off_t offlo; 2880 off_t offhi; 2881 struct proc * a_p; 2882 } */ *ap = v; 2883 2884 return (nfs_flush(ap->a_vp, ap->a_cred, 2885 (ap->a_flags & FSYNC_WAIT) != 0 ? MNT_WAIT : 0, ap->a_p, 1)); 2886 } 2887 2888 /* 2889 * Flush all the data associated with a vnode. 2890 */ 2891 int 2892 nfs_flush(vp, cred, waitfor, p, commit) 2893 struct vnode *vp; 2894 struct ucred *cred; 2895 int waitfor; 2896 struct proc *p; 2897 int commit; 2898 { 2899 struct nfsnode *np = VTONFS(vp); 2900 int error; 2901 int flushflags = PGO_ALLPAGES|PGO_CLEANIT|PGO_SYNCIO; 2902 UVMHIST_FUNC("nfs_flush"); UVMHIST_CALLED(ubchist); 2903 2904 simple_lock(&vp->v_interlock); 2905 error = VOP_PUTPAGES(vp, 0, 0, flushflags); 2906 if (np->n_flag & NWRITEERR) { 2907 error = np->n_error; 2908 np->n_flag &= ~NWRITEERR; 2909 } 2910 UVMHIST_LOG(ubchist, "returning %d", error,0,0,0); 2911 return (error); 2912 } 2913 2914 /* 2915 * Return POSIX pathconf information applicable to nfs. 2916 * 2917 * N.B. The NFS V2 protocol doesn't support this RPC. 2918 */ 2919 /* ARGSUSED */ 2920 int 2921 nfs_pathconf(v) 2922 void *v; 2923 { 2924 struct vop_pathconf_args /* { 2925 struct vnode *a_vp; 2926 int a_name; 2927 register_t *a_retval; 2928 } */ *ap = v; 2929 struct nfsv3_pathconf *pcp; 2930 struct vnode *vp = ap->a_vp; 2931 struct mbuf *mreq, *mrep, *md, *mb; 2932 int32_t t1, t2; 2933 u_int32_t *tl; 2934 caddr_t bpos, dpos, cp, cp2; 2935 int error = 0, attrflag; 2936 #ifndef NFS_V2_ONLY 2937 struct nfsmount *nmp; 2938 unsigned int l; 2939 u_int64_t maxsize; 2940 #endif 2941 const int v3 = NFS_ISV3(vp); 2942 2943 switch (ap->a_name) { 2944 /* Names that can be resolved locally. */ 2945 case _PC_PIPE_BUF: 2946 *ap->a_retval = PIPE_BUF; 2947 break; 2948 case _PC_SYNC_IO: 2949 *ap->a_retval = 1; 2950 break; 2951 /* Names that cannot be resolved locally; do an RPC, if possible. */ 2952 case _PC_LINK_MAX: 2953 case _PC_NAME_MAX: 2954 case _PC_CHOWN_RESTRICTED: 2955 case _PC_NO_TRUNC: 2956 if (!v3) { 2957 error = EINVAL; 2958 break; 2959 } 2960 nfsstats.rpccnt[NFSPROC_PATHCONF]++; 2961 nfsm_reqhead(vp, NFSPROC_PATHCONF, NFSX_FH(1)); 2962 nfsm_fhtom(vp, 1); 2963 nfsm_request(vp, NFSPROC_PATHCONF, 2964 curproc, curproc->p_ucred); /* XXX */ 2965 nfsm_postop_attr(vp, attrflag, 0); 2966 if (!error) { 2967 nfsm_dissect(pcp, struct nfsv3_pathconf *, 2968 NFSX_V3PATHCONF); 2969 switch (ap->a_name) { 2970 case _PC_LINK_MAX: 2971 *ap->a_retval = 2972 fxdr_unsigned(register_t, pcp->pc_linkmax); 2973 break; 2974 case _PC_NAME_MAX: 2975 *ap->a_retval = 2976 fxdr_unsigned(register_t, pcp->pc_namemax); 2977 break; 2978 case _PC_CHOWN_RESTRICTED: 2979 *ap->a_retval = 2980 (pcp->pc_chownrestricted == nfs_true); 2981 break; 2982 case _PC_NO_TRUNC: 2983 *ap->a_retval = 2984 (pcp->pc_notrunc == nfs_true); 2985 break; 2986 } 2987 } 2988 nfsm_reqdone; 2989 break; 2990 case _PC_FILESIZEBITS: 2991 #ifndef NFS_V2_ONLY 2992 if (v3) { 2993 nmp = VFSTONFS(vp->v_mount); 2994 if ((nmp->nm_iflag & NFSMNT_GOTFSINFO) == 0) 2995 if ((error = nfs_fsinfo(nmp, vp, 2996 curproc->p_ucred, curproc)) != 0) /* XXX */ 2997 break; 2998 for (l = 0, maxsize = nmp->nm_maxfilesize; 2999 (maxsize >> l) > 0; l++) 3000 ; 3001 *ap->a_retval = l + 1; 3002 } else 3003 #endif 3004 { 3005 *ap->a_retval = 32; /* NFS V2 limitation */ 3006 } 3007 break; 3008 default: 3009 error = EINVAL; 3010 break; 3011 } 3012 3013 return (error); 3014 } 3015 3016 /* 3017 * NFS advisory byte-level locks. 3018 */ 3019 int 3020 nfs_advlock(v) 3021 void *v; 3022 { 3023 struct vop_advlock_args /* { 3024 struct vnode *a_vp; 3025 caddr_t a_id; 3026 int a_op; 3027 struct flock *a_fl; 3028 int a_flags; 3029 } */ *ap = v; 3030 struct nfsnode *np = VTONFS(ap->a_vp); 3031 3032 return lf_advlock(ap, &np->n_lockf, np->n_size); 3033 } 3034 3035 /* 3036 * Print out the contents of an nfsnode. 3037 */ 3038 int 3039 nfs_print(v) 3040 void *v; 3041 { 3042 struct vop_print_args /* { 3043 struct vnode *a_vp; 3044 } */ *ap = v; 3045 struct vnode *vp = ap->a_vp; 3046 struct nfsnode *np = VTONFS(vp); 3047 3048 printf("tag VT_NFS, fileid %ld fsid 0x%lx", 3049 np->n_vattr->va_fileid, np->n_vattr->va_fsid); 3050 if (vp->v_type == VFIFO) 3051 fifo_printinfo(vp); 3052 printf("\n"); 3053 return (0); 3054 } 3055 3056 /* 3057 * NFS file truncation. 3058 */ 3059 int 3060 nfs_truncate(v) 3061 void *v; 3062 { 3063 #if 0 3064 struct vop_truncate_args /* { 3065 struct vnode *a_vp; 3066 off_t a_length; 3067 int a_flags; 3068 struct ucred *a_cred; 3069 struct proc *a_p; 3070 } */ *ap = v; 3071 #endif 3072 3073 /* Use nfs_setattr */ 3074 return (EOPNOTSUPP); 3075 } 3076 3077 /* 3078 * NFS update. 3079 */ 3080 int 3081 nfs_update(v) 3082 void *v; 3083 #if 0 3084 struct vop_update_args /* { 3085 struct vnode *a_vp; 3086 struct timespec *a_ta; 3087 struct timespec *a_tm; 3088 int a_waitfor; 3089 } */ *ap = v; 3090 #endif 3091 { 3092 3093 /* Use nfs_setattr */ 3094 return (EOPNOTSUPP); 3095 } 3096 3097 /* 3098 * Just call bwrite(). 3099 */ 3100 int 3101 nfs_bwrite(v) 3102 void *v; 3103 { 3104 struct vop_bwrite_args /* { 3105 struct vnode *a_bp; 3106 } */ *ap = v; 3107 3108 return (bwrite(ap->a_bp)); 3109 } 3110 3111 /* 3112 * nfs unlock wrapper. 3113 */ 3114 int 3115 nfs_unlock(void *v) 3116 { 3117 struct vop_unlock_args /* { 3118 struct vnode *a_vp; 3119 int a_flags; 3120 } */ *ap = v; 3121 struct vnode *vp = ap->a_vp; 3122 3123 /* 3124 * VOP_UNLOCK can be called by nfs_loadattrcache 3125 * with v_data == 0. 3126 */ 3127 if (VTONFS(vp)) { 3128 nfs_delayedtruncate(vp); 3129 } 3130 3131 return genfs_unlock(v); 3132 } 3133 3134 /* 3135 * nfs special file access vnode op. 3136 * Essentially just get vattr and then imitate iaccess() since the device is 3137 * local to the client. 3138 */ 3139 int 3140 nfsspec_access(v) 3141 void *v; 3142 { 3143 struct vop_access_args /* { 3144 struct vnode *a_vp; 3145 int a_mode; 3146 struct ucred *a_cred; 3147 struct proc *a_p; 3148 } */ *ap = v; 3149 struct vattr va; 3150 struct vnode *vp = ap->a_vp; 3151 int error; 3152 3153 error = VOP_GETATTR(vp, &va, ap->a_cred, ap->a_p); 3154 if (error) 3155 return (error); 3156 3157 /* 3158 * Disallow write attempts on filesystems mounted read-only; 3159 * unless the file is a socket, fifo, or a block or character 3160 * device resident on the filesystem. 3161 */ 3162 if ((ap->a_mode & VWRITE) && (vp->v_mount->mnt_flag & MNT_RDONLY)) { 3163 switch (vp->v_type) { 3164 case VREG: 3165 case VDIR: 3166 case VLNK: 3167 return (EROFS); 3168 default: 3169 break; 3170 } 3171 } 3172 3173 return (vaccess(va.va_type, va.va_mode, 3174 va.va_uid, va.va_gid, ap->a_mode, ap->a_cred)); 3175 } 3176 3177 /* 3178 * Read wrapper for special devices. 3179 */ 3180 int 3181 nfsspec_read(v) 3182 void *v; 3183 { 3184 struct vop_read_args /* { 3185 struct vnode *a_vp; 3186 struct uio *a_uio; 3187 int a_ioflag; 3188 struct ucred *a_cred; 3189 } */ *ap = v; 3190 struct nfsnode *np = VTONFS(ap->a_vp); 3191 3192 /* 3193 * Set access flag. 3194 */ 3195 np->n_flag |= NACC; 3196 np->n_atim.tv_sec = time.tv_sec; 3197 np->n_atim.tv_nsec = time.tv_usec * 1000; 3198 return (VOCALL(spec_vnodeop_p, VOFFSET(vop_read), ap)); 3199 } 3200 3201 /* 3202 * Write wrapper for special devices. 3203 */ 3204 int 3205 nfsspec_write(v) 3206 void *v; 3207 { 3208 struct vop_write_args /* { 3209 struct vnode *a_vp; 3210 struct uio *a_uio; 3211 int a_ioflag; 3212 struct ucred *a_cred; 3213 } */ *ap = v; 3214 struct nfsnode *np = VTONFS(ap->a_vp); 3215 3216 /* 3217 * Set update flag. 3218 */ 3219 np->n_flag |= NUPD; 3220 np->n_mtim.tv_sec = time.tv_sec; 3221 np->n_mtim.tv_nsec = time.tv_usec * 1000; 3222 return (VOCALL(spec_vnodeop_p, VOFFSET(vop_write), ap)); 3223 } 3224 3225 /* 3226 * Close wrapper for special devices. 3227 * 3228 * Update the times on the nfsnode then do device close. 3229 */ 3230 int 3231 nfsspec_close(v) 3232 void *v; 3233 { 3234 struct vop_close_args /* { 3235 struct vnode *a_vp; 3236 int a_fflag; 3237 struct ucred *a_cred; 3238 struct proc *a_p; 3239 } */ *ap = v; 3240 struct vnode *vp = ap->a_vp; 3241 struct nfsnode *np = VTONFS(vp); 3242 struct vattr vattr; 3243 3244 if (np->n_flag & (NACC | NUPD)) { 3245 np->n_flag |= NCHG; 3246 if (vp->v_usecount == 1 && 3247 (vp->v_mount->mnt_flag & MNT_RDONLY) == 0) { 3248 VATTR_NULL(&vattr); 3249 if (np->n_flag & NACC) 3250 vattr.va_atime = np->n_atim; 3251 if (np->n_flag & NUPD) 3252 vattr.va_mtime = np->n_mtim; 3253 (void)VOP_SETATTR(vp, &vattr, ap->a_cred, ap->a_p); 3254 } 3255 } 3256 return (VOCALL(spec_vnodeop_p, VOFFSET(vop_close), ap)); 3257 } 3258 3259 /* 3260 * Read wrapper for fifos. 3261 */ 3262 int 3263 nfsfifo_read(v) 3264 void *v; 3265 { 3266 struct vop_read_args /* { 3267 struct vnode *a_vp; 3268 struct uio *a_uio; 3269 int a_ioflag; 3270 struct ucred *a_cred; 3271 } */ *ap = v; 3272 struct nfsnode *np = VTONFS(ap->a_vp); 3273 3274 /* 3275 * Set access flag. 3276 */ 3277 np->n_flag |= NACC; 3278 np->n_atim.tv_sec = time.tv_sec; 3279 np->n_atim.tv_nsec = time.tv_usec * 1000; 3280 return (VOCALL(fifo_vnodeop_p, VOFFSET(vop_read), ap)); 3281 } 3282 3283 /* 3284 * Write wrapper for fifos. 3285 */ 3286 int 3287 nfsfifo_write(v) 3288 void *v; 3289 { 3290 struct vop_write_args /* { 3291 struct vnode *a_vp; 3292 struct uio *a_uio; 3293 int a_ioflag; 3294 struct ucred *a_cred; 3295 } */ *ap = v; 3296 struct nfsnode *np = VTONFS(ap->a_vp); 3297 3298 /* 3299 * Set update flag. 3300 */ 3301 np->n_flag |= NUPD; 3302 np->n_mtim.tv_sec = time.tv_sec; 3303 np->n_mtim.tv_nsec = time.tv_usec * 1000; 3304 return (VOCALL(fifo_vnodeop_p, VOFFSET(vop_write), ap)); 3305 } 3306 3307 /* 3308 * Close wrapper for fifos. 3309 * 3310 * Update the times on the nfsnode then do fifo close. 3311 */ 3312 int 3313 nfsfifo_close(v) 3314 void *v; 3315 { 3316 struct vop_close_args /* { 3317 struct vnode *a_vp; 3318 int a_fflag; 3319 struct ucred *a_cred; 3320 struct proc *a_p; 3321 } */ *ap = v; 3322 struct vnode *vp = ap->a_vp; 3323 struct nfsnode *np = VTONFS(vp); 3324 struct vattr vattr; 3325 3326 if (np->n_flag & (NACC | NUPD)) { 3327 if (np->n_flag & NACC) { 3328 np->n_atim.tv_sec = time.tv_sec; 3329 np->n_atim.tv_nsec = time.tv_usec * 1000; 3330 } 3331 if (np->n_flag & NUPD) { 3332 np->n_mtim.tv_sec = time.tv_sec; 3333 np->n_mtim.tv_nsec = time.tv_usec * 1000; 3334 } 3335 np->n_flag |= NCHG; 3336 if (vp->v_usecount == 1 && 3337 (vp->v_mount->mnt_flag & MNT_RDONLY) == 0) { 3338 VATTR_NULL(&vattr); 3339 if (np->n_flag & NACC) 3340 vattr.va_atime = np->n_atim; 3341 if (np->n_flag & NUPD) 3342 vattr.va_mtime = np->n_mtim; 3343 (void)VOP_SETATTR(vp, &vattr, ap->a_cred, ap->a_p); 3344 } 3345 } 3346 return (VOCALL(fifo_vnodeop_p, VOFFSET(vop_close), ap)); 3347 } 3348
Indexes created Mon Oct 13 16:09:52 GMT 2025