nfs_vnops.c revision 1.178
1 /* $NetBSD: nfs_vnops.c,v 1.178 2003/09/17 09:10:00 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. Neither the name of the University nor the names of its contributors 19 * may be used to endorse or promote products derived from this software 20 * without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 * SUCH DAMAGE. 33 * 34 * @(#)nfs_vnops.c 8.19 (Berkeley) 7/31/95 35 */ 36 37 /* 38 * vnode op calls for Sun NFS version 2 and 3 39 */ 40 41 #include <sys/cdefs.h> 42 __KERNEL_RCSID(0, "$NetBSD: nfs_vnops.c,v 1.178 2003/09/17 09:10:00 yamt Exp $"); 43 44 #include "opt_nfs.h" 45 #include "opt_uvmhist.h" 46 47 #include <sys/param.h> 48 #include <sys/proc.h> 49 #include <sys/kernel.h> 50 #include <sys/systm.h> 51 #include <sys/resourcevar.h> 52 #include <sys/proc.h> 53 #include <sys/mount.h> 54 #include <sys/buf.h> 55 #include <sys/malloc.h> 56 #include <sys/mbuf.h> 57 #include <sys/namei.h> 58 #include <sys/vnode.h> 59 #include <sys/dirent.h> 60 #include <sys/fcntl.h> 61 #include <sys/hash.h> 62 #include <sys/lockf.h> 63 #include <sys/stat.h> 64 #include <sys/unistd.h> 65 66 #include <uvm/uvm_extern.h> 67 #include <uvm/uvm.h> 68 69 #include <miscfs/fifofs/fifo.h> 70 #include <miscfs/genfs/genfs.h> 71 #include <miscfs/specfs/specdev.h> 72 73 #include <nfs/rpcv2.h> 74 #include <nfs/nfsproto.h> 75 #include <nfs/nfs.h> 76 #include <nfs/nfsnode.h> 77 #include <nfs/nfsmount.h> 78 #include <nfs/xdr_subs.h> 79 #include <nfs/nfsm_subs.h> 80 #include <nfs/nqnfs.h> 81 #include <nfs/nfs_var.h> 82 83 #include <net/if.h> 84 #include <netinet/in.h> 85 #include <netinet/in_var.h> 86 87 /* 88 * Global vfs data structures for nfs 89 */ 90 int (**nfsv2_vnodeop_p) __P((void *)); 91 const struct vnodeopv_entry_desc nfsv2_vnodeop_entries[] = { 92 { &vop_default_desc, vn_default_error }, 93 { &vop_lookup_desc, nfs_lookup }, /* lookup */ 94 { &vop_create_desc, nfs_create }, /* create */ 95 { &vop_mknod_desc, nfs_mknod }, /* mknod */ 96 { &vop_open_desc, nfs_open }, /* open */ 97 { &vop_close_desc, nfs_close }, /* close */ 98 { &vop_access_desc, nfs_access }, /* access */ 99 { &vop_getattr_desc, nfs_getattr }, /* getattr */ 100 { &vop_setattr_desc, nfs_setattr }, /* setattr */ 101 { &vop_read_desc, nfs_read }, /* read */ 102 { &vop_write_desc, nfs_write }, /* write */ 103 { &vop_lease_desc, nfs_lease_check }, /* lease */ 104 { &vop_fcntl_desc, genfs_fcntl }, /* fcntl */ 105 { &vop_ioctl_desc, nfs_ioctl }, /* ioctl */ 106 { &vop_poll_desc, nfs_poll }, /* poll */ 107 { &vop_kqfilter_desc, nfs_kqfilter }, /* kqfilter */ 108 { &vop_revoke_desc, nfs_revoke }, /* revoke */ 109 { &vop_mmap_desc, nfs_mmap }, /* mmap */ 110 { &vop_fsync_desc, nfs_fsync }, /* fsync */ 111 { &vop_seek_desc, nfs_seek }, /* seek */ 112 { &vop_remove_desc, nfs_remove }, /* remove */ 113 { &vop_link_desc, nfs_link }, /* link */ 114 { &vop_rename_desc, nfs_rename }, /* rename */ 115 { &vop_mkdir_desc, nfs_mkdir }, /* mkdir */ 116 { &vop_rmdir_desc, nfs_rmdir }, /* rmdir */ 117 { &vop_symlink_desc, nfs_symlink }, /* symlink */ 118 { &vop_readdir_desc, nfs_readdir }, /* readdir */ 119 { &vop_readlink_desc, nfs_readlink }, /* readlink */ 120 { &vop_abortop_desc, nfs_abortop }, /* abortop */ 121 { &vop_inactive_desc, nfs_inactive }, /* inactive */ 122 { &vop_reclaim_desc, nfs_reclaim }, /* reclaim */ 123 { &vop_lock_desc, nfs_lock }, /* lock */ 124 { &vop_unlock_desc, nfs_unlock }, /* unlock */ 125 { &vop_bmap_desc, nfs_bmap }, /* bmap */ 126 { &vop_strategy_desc, nfs_strategy }, /* strategy */ 127 { &vop_print_desc, nfs_print }, /* print */ 128 { &vop_islocked_desc, nfs_islocked }, /* islocked */ 129 { &vop_pathconf_desc, nfs_pathconf }, /* pathconf */ 130 { &vop_advlock_desc, nfs_advlock }, /* advlock */ 131 { &vop_blkatoff_desc, nfs_blkatoff }, /* blkatoff */ 132 { &vop_valloc_desc, nfs_valloc }, /* valloc */ 133 { &vop_reallocblks_desc, nfs_reallocblks }, /* reallocblks */ 134 { &vop_vfree_desc, nfs_vfree }, /* vfree */ 135 { &vop_truncate_desc, nfs_truncate }, /* truncate */ 136 { &vop_update_desc, nfs_update }, /* update */ 137 { &vop_bwrite_desc, nfs_bwrite }, /* bwrite */ 138 { &vop_getpages_desc, nfs_getpages }, /* getpages */ 139 { &vop_putpages_desc, genfs_putpages }, /* putpages */ 140 { NULL, NULL } 141 }; 142 const struct vnodeopv_desc nfsv2_vnodeop_opv_desc = 143 { &nfsv2_vnodeop_p, nfsv2_vnodeop_entries }; 144 145 /* 146 * Special device vnode ops 147 */ 148 int (**spec_nfsv2nodeop_p) __P((void *)); 149 const struct vnodeopv_entry_desc spec_nfsv2nodeop_entries[] = { 150 { &vop_default_desc, vn_default_error }, 151 { &vop_lookup_desc, spec_lookup }, /* lookup */ 152 { &vop_create_desc, spec_create }, /* create */ 153 { &vop_mknod_desc, spec_mknod }, /* mknod */ 154 { &vop_open_desc, spec_open }, /* open */ 155 { &vop_close_desc, nfsspec_close }, /* close */ 156 { &vop_access_desc, nfsspec_access }, /* access */ 157 { &vop_getattr_desc, nfs_getattr }, /* getattr */ 158 { &vop_setattr_desc, nfs_setattr }, /* setattr */ 159 { &vop_read_desc, nfsspec_read }, /* read */ 160 { &vop_write_desc, nfsspec_write }, /* write */ 161 { &vop_lease_desc, spec_lease_check }, /* lease */ 162 { &vop_fcntl_desc, genfs_fcntl }, /* fcntl */ 163 { &vop_ioctl_desc, spec_ioctl }, /* ioctl */ 164 { &vop_poll_desc, spec_poll }, /* poll */ 165 { &vop_kqfilter_desc, spec_kqfilter }, /* kqfilter */ 166 { &vop_revoke_desc, spec_revoke }, /* revoke */ 167 { &vop_mmap_desc, spec_mmap }, /* mmap */ 168 { &vop_fsync_desc, spec_fsync }, /* fsync */ 169 { &vop_seek_desc, spec_seek }, /* seek */ 170 { &vop_remove_desc, spec_remove }, /* remove */ 171 { &vop_link_desc, spec_link }, /* link */ 172 { &vop_rename_desc, spec_rename }, /* rename */ 173 { &vop_mkdir_desc, spec_mkdir }, /* mkdir */ 174 { &vop_rmdir_desc, spec_rmdir }, /* rmdir */ 175 { &vop_symlink_desc, spec_symlink }, /* symlink */ 176 { &vop_readdir_desc, spec_readdir }, /* readdir */ 177 { &vop_readlink_desc, spec_readlink }, /* readlink */ 178 { &vop_abortop_desc, spec_abortop }, /* abortop */ 179 { &vop_inactive_desc, nfs_inactive }, /* inactive */ 180 { &vop_reclaim_desc, nfs_reclaim }, /* reclaim */ 181 { &vop_lock_desc, nfs_lock }, /* lock */ 182 { &vop_unlock_desc, nfs_unlock }, /* unlock */ 183 { &vop_bmap_desc, spec_bmap }, /* bmap */ 184 { &vop_strategy_desc, spec_strategy }, /* strategy */ 185 { &vop_print_desc, nfs_print }, /* print */ 186 { &vop_islocked_desc, nfs_islocked }, /* islocked */ 187 { &vop_pathconf_desc, spec_pathconf }, /* pathconf */ 188 { &vop_advlock_desc, spec_advlock }, /* advlock */ 189 { &vop_blkatoff_desc, spec_blkatoff }, /* blkatoff */ 190 { &vop_valloc_desc, spec_valloc }, /* valloc */ 191 { &vop_reallocblks_desc, spec_reallocblks }, /* reallocblks */ 192 { &vop_vfree_desc, spec_vfree }, /* vfree */ 193 { &vop_truncate_desc, spec_truncate }, /* truncate */ 194 { &vop_update_desc, nfs_update }, /* update */ 195 { &vop_bwrite_desc, vn_bwrite }, /* bwrite */ 196 { &vop_getpages_desc, spec_getpages }, /* getpages */ 197 { &vop_putpages_desc, spec_putpages }, /* putpages */ 198 { NULL, NULL } 199 }; 200 const struct vnodeopv_desc spec_nfsv2nodeop_opv_desc = 201 { &spec_nfsv2nodeop_p, spec_nfsv2nodeop_entries }; 202 203 int (**fifo_nfsv2nodeop_p) __P((void *)); 204 const struct vnodeopv_entry_desc fifo_nfsv2nodeop_entries[] = { 205 { &vop_default_desc, vn_default_error }, 206 { &vop_lookup_desc, fifo_lookup }, /* lookup */ 207 { &vop_create_desc, fifo_create }, /* create */ 208 { &vop_mknod_desc, fifo_mknod }, /* mknod */ 209 { &vop_open_desc, fifo_open }, /* open */ 210 { &vop_close_desc, nfsfifo_close }, /* close */ 211 { &vop_access_desc, nfsspec_access }, /* access */ 212 { &vop_getattr_desc, nfs_getattr }, /* getattr */ 213 { &vop_setattr_desc, nfs_setattr }, /* setattr */ 214 { &vop_read_desc, nfsfifo_read }, /* read */ 215 { &vop_write_desc, nfsfifo_write }, /* write */ 216 { &vop_lease_desc, fifo_lease_check }, /* lease */ 217 { &vop_fcntl_desc, genfs_fcntl }, /* fcntl */ 218 { &vop_ioctl_desc, fifo_ioctl }, /* ioctl */ 219 { &vop_poll_desc, fifo_poll }, /* poll */ 220 { &vop_kqfilter_desc, fifo_kqfilter }, /* kqfilter */ 221 { &vop_revoke_desc, fifo_revoke }, /* revoke */ 222 { &vop_mmap_desc, fifo_mmap }, /* mmap */ 223 { &vop_fsync_desc, nfs_fsync }, /* fsync */ 224 { &vop_seek_desc, fifo_seek }, /* seek */ 225 { &vop_remove_desc, fifo_remove }, /* remove */ 226 { &vop_link_desc, fifo_link }, /* link */ 227 { &vop_rename_desc, fifo_rename }, /* rename */ 228 { &vop_mkdir_desc, fifo_mkdir }, /* mkdir */ 229 { &vop_rmdir_desc, fifo_rmdir }, /* rmdir */ 230 { &vop_symlink_desc, fifo_symlink }, /* symlink */ 231 { &vop_readdir_desc, fifo_readdir }, /* readdir */ 232 { &vop_readlink_desc, fifo_readlink }, /* readlink */ 233 { &vop_abortop_desc, fifo_abortop }, /* abortop */ 234 { &vop_inactive_desc, nfs_inactive }, /* inactive */ 235 { &vop_reclaim_desc, nfs_reclaim }, /* reclaim */ 236 { &vop_lock_desc, nfs_lock }, /* lock */ 237 { &vop_unlock_desc, nfs_unlock }, /* unlock */ 238 { &vop_bmap_desc, fifo_bmap }, /* bmap */ 239 { &vop_strategy_desc, genfs_badop }, /* strategy */ 240 { &vop_print_desc, nfs_print }, /* print */ 241 { &vop_islocked_desc, nfs_islocked }, /* islocked */ 242 { &vop_pathconf_desc, fifo_pathconf }, /* pathconf */ 243 { &vop_advlock_desc, fifo_advlock }, /* advlock */ 244 { &vop_blkatoff_desc, fifo_blkatoff }, /* blkatoff */ 245 { &vop_valloc_desc, fifo_valloc }, /* valloc */ 246 { &vop_reallocblks_desc, fifo_reallocblks }, /* reallocblks */ 247 { &vop_vfree_desc, fifo_vfree }, /* vfree */ 248 { &vop_truncate_desc, fifo_truncate }, /* truncate */ 249 { &vop_update_desc, nfs_update }, /* update */ 250 { &vop_bwrite_desc, vn_bwrite }, /* bwrite */ 251 { &vop_putpages_desc, fifo_putpages }, /* putpages */ 252 { NULL, NULL } 253 }; 254 const struct vnodeopv_desc fifo_nfsv2nodeop_opv_desc = 255 { &fifo_nfsv2nodeop_p, fifo_nfsv2nodeop_entries }; 256 257 static void nfs_writerpc_extfree(struct mbuf *, caddr_t, size_t, void *); 258 259 /* 260 * Global variables 261 */ 262 extern u_int32_t nfs_true, nfs_false; 263 extern u_int32_t nfs_xdrneg1; 264 extern const nfstype nfsv3_type[9]; 265 266 int nfs_numasync = 0; 267 #define DIRHDSIZ (sizeof (struct dirent) - (MAXNAMLEN + 1)) 268 269 /* 270 * nfs null call from vfs. 271 */ 272 int 273 nfs_null(vp, cred, procp) 274 struct vnode *vp; 275 struct ucred *cred; 276 struct proc *procp; 277 { 278 caddr_t bpos, dpos; 279 int error = 0; 280 struct mbuf *mreq, *mrep, *md, *mb; 281 struct nfsnode *np = VTONFS(vp); 282 283 nfsm_reqhead(np, NFSPROC_NULL, 0); 284 nfsm_request(np, NFSPROC_NULL, procp, cred); 285 nfsm_reqdone; 286 return (error); 287 } 288 289 /* 290 * nfs access vnode op. 291 * For nfs version 2, just return ok. File accesses may fail later. 292 * For nfs version 3, use the access rpc to check accessibility. If file modes 293 * are changed on the server, accesses might still fail later. 294 */ 295 int 296 nfs_access(v) 297 void *v; 298 { 299 struct vop_access_args /* { 300 struct vnode *a_vp; 301 int a_mode; 302 struct ucred *a_cred; 303 struct proc *a_p; 304 } */ *ap = v; 305 struct vnode *vp = ap->a_vp; 306 u_int32_t *tl; 307 caddr_t cp; 308 int32_t t1, t2; 309 caddr_t bpos, dpos, cp2; 310 int error = 0, attrflag, cachevalid; 311 struct mbuf *mreq, *mrep, *md, *mb; 312 u_int32_t mode, rmode; 313 const int v3 = NFS_ISV3(vp); 314 struct nfsnode *np = VTONFS(vp); 315 316 cachevalid = (np->n_accstamp != -1 && 317 (time.tv_sec - np->n_accstamp) < NFS_ATTRTIMEO(np) && 318 np->n_accuid == ap->a_cred->cr_uid); 319 320 /* 321 * Check access cache first. If this request has been made for this 322 * uid shortly before, use the cached result. 323 */ 324 if (cachevalid) { 325 if (!np->n_accerror) { 326 if ((np->n_accmode & ap->a_mode) == ap->a_mode) 327 return np->n_accerror; 328 } else if ((np->n_accmode & ap->a_mode) == np->n_accmode) 329 return np->n_accerror; 330 } 331 332 /* 333 * For nfs v3, do an access rpc, otherwise you are stuck emulating 334 * ufs_access() locally using the vattr. This may not be correct, 335 * since the server may apply other access criteria such as 336 * client uid-->server uid mapping that we do not know about, but 337 * this is better than just returning anything that is lying about 338 * in the cache. 339 */ 340 if (v3) { 341 nfsstats.rpccnt[NFSPROC_ACCESS]++; 342 nfsm_reqhead(np, NFSPROC_ACCESS, NFSX_FH(v3) + NFSX_UNSIGNED); 343 nfsm_fhtom(np, v3); 344 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); 345 if (ap->a_mode & VREAD) 346 mode = NFSV3ACCESS_READ; 347 else 348 mode = 0; 349 if (vp->v_type != VDIR) { 350 if (ap->a_mode & VWRITE) 351 mode |= (NFSV3ACCESS_MODIFY | NFSV3ACCESS_EXTEND); 352 if (ap->a_mode & VEXEC) 353 mode |= NFSV3ACCESS_EXECUTE; 354 } else { 355 if (ap->a_mode & VWRITE) 356 mode |= (NFSV3ACCESS_MODIFY | NFSV3ACCESS_EXTEND | 357 NFSV3ACCESS_DELETE); 358 if (ap->a_mode & VEXEC) 359 mode |= NFSV3ACCESS_LOOKUP; 360 } 361 *tl = txdr_unsigned(mode); 362 nfsm_request(np, NFSPROC_ACCESS, ap->a_p, ap->a_cred); 363 nfsm_postop_attr(vp, attrflag, 0); 364 if (!error) { 365 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 366 rmode = fxdr_unsigned(u_int32_t, *tl); 367 /* 368 * The NFS V3 spec does not clarify whether or not 369 * the returned access bits can be a superset of 370 * the ones requested, so... 371 */ 372 if ((rmode & mode) != mode) 373 error = EACCES; 374 } 375 nfsm_reqdone; 376 } else 377 return (nfsspec_access(ap)); 378 /* 379 * Disallow write attempts on filesystems mounted read-only; 380 * unless the file is a socket, fifo, or a block or character 381 * device resident on the filesystem. 382 */ 383 if (!error && (ap->a_mode & VWRITE) && 384 (vp->v_mount->mnt_flag & MNT_RDONLY)) { 385 switch (vp->v_type) { 386 case VREG: 387 case VDIR: 388 case VLNK: 389 error = EROFS; 390 default: 391 break; 392 } 393 } 394 395 if (!error || error == EACCES) { 396 /* 397 * If we got the same result as for a previous, 398 * different request, OR it in. Don't update 399 * the timestamp in that case. 400 */ 401 if (cachevalid && np->n_accstamp != -1 && 402 error == np->n_accerror) { 403 if (!error) 404 np->n_accmode |= ap->a_mode; 405 else if ((np->n_accmode & ap->a_mode) == ap->a_mode) 406 np->n_accmode = ap->a_mode; 407 } else { 408 np->n_accstamp = time.tv_sec; 409 np->n_accuid = ap->a_cred->cr_uid; 410 np->n_accmode = ap->a_mode; 411 np->n_accerror = error; 412 } 413 } 414 415 return (error); 416 } 417 418 /* 419 * nfs open vnode op 420 * Check to see if the type is ok 421 * and that deletion is not in progress. 422 * For paged in text files, you will need to flush the page cache 423 * if consistency is lost. 424 */ 425 /* ARGSUSED */ 426 int 427 nfs_open(v) 428 void *v; 429 { 430 struct vop_open_args /* { 431 struct vnode *a_vp; 432 int a_mode; 433 struct ucred *a_cred; 434 struct proc *a_p; 435 } */ *ap = v; 436 struct vnode *vp = ap->a_vp; 437 struct nfsnode *np = VTONFS(vp); 438 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 439 struct vattr vattr; 440 int error; 441 442 if (vp->v_type != VREG && vp->v_type != VDIR && vp->v_type != VLNK) { 443 return (EACCES); 444 } 445 446 /* 447 * Initialize read and write creds here, for swapfiles 448 * and other paths that don't set the creds themselves. 449 */ 450 451 if (ap->a_mode & FREAD) { 452 if (np->n_rcred) { 453 crfree(np->n_rcred); 454 } 455 np->n_rcred = ap->a_cred; 456 crhold(np->n_rcred); 457 } 458 if (ap->a_mode & FWRITE) { 459 if (np->n_wcred) { 460 crfree(np->n_wcred); 461 } 462 np->n_wcred = ap->a_cred; 463 crhold(np->n_wcred); 464 } 465 466 #ifndef NFS_V2_ONLY 467 /* 468 * Get a valid lease. If cached data is stale, flush it. 469 */ 470 if (nmp->nm_flag & NFSMNT_NQNFS) { 471 if (NQNFS_CKINVALID(vp, np, ND_READ)) { 472 do { 473 error = nqnfs_getlease(vp, ND_READ, ap->a_cred, 474 ap->a_p); 475 } while (error == NQNFS_EXPIRED); 476 if (error) 477 return (error); 478 if (np->n_lrev != np->n_brev || 479 (np->n_flag & NQNFSNONCACHE)) { 480 if ((error = nfs_vinvalbuf(vp, V_SAVE, ap->a_cred, 481 ap->a_p, 1)) == EINTR) 482 return (error); 483 np->n_brev = np->n_lrev; 484 } 485 } 486 } else 487 #endif 488 { 489 if (np->n_flag & NMODIFIED) { 490 if ((error = nfs_vinvalbuf(vp, V_SAVE, ap->a_cred, 491 ap->a_p, 1)) == EINTR) 492 return (error); 493 np->n_attrstamp = 0; 494 if (vp->v_type == VDIR) { 495 nfs_invaldircache(vp, 0); 496 np->n_direofoffset = 0; 497 } 498 error = VOP_GETATTR(vp, &vattr, ap->a_cred, ap->a_p); 499 if (error) 500 return (error); 501 np->n_mtime = vattr.va_mtime.tv_sec; 502 } else { 503 error = VOP_GETATTR(vp, &vattr, ap->a_cred, ap->a_p); 504 if (error) 505 return (error); 506 if (np->n_mtime != vattr.va_mtime.tv_sec) { 507 if (vp->v_type == VDIR) { 508 nfs_invaldircache(vp, 0); 509 np->n_direofoffset = 0; 510 } 511 if ((error = nfs_vinvalbuf(vp, V_SAVE, 512 ap->a_cred, ap->a_p, 1)) == EINTR) 513 return (error); 514 np->n_mtime = vattr.va_mtime.tv_sec; 515 } 516 } 517 } 518 if ((nmp->nm_flag & NFSMNT_NQNFS) == 0) 519 np->n_attrstamp = 0; /* For Open/Close consistency */ 520 return (0); 521 } 522 523 /* 524 * nfs close vnode op 525 * What an NFS client should do upon close after writing is a debatable issue. 526 * Most NFS clients push delayed writes to the server upon close, basically for 527 * two reasons: 528 * 1 - So that any write errors may be reported back to the client process 529 * doing the close system call. By far the two most likely errors are 530 * NFSERR_NOSPC and NFSERR_DQUOT to indicate space allocation failure. 531 * 2 - To put a worst case upper bound on cache inconsistency between 532 * multiple clients for the file. 533 * There is also a consistency problem for Version 2 of the protocol w.r.t. 534 * not being able to tell if other clients are writing a file concurrently, 535 * since there is no way of knowing if the changed modify time in the reply 536 * is only due to the write for this client. 537 * (NFS Version 3 provides weak cache consistency data in the reply that 538 * should be sufficient to detect and handle this case.) 539 * 540 * The current code does the following: 541 * for NFS Version 2 - play it safe and flush/invalidate all dirty buffers 542 * for NFS Version 3 - flush dirty buffers to the server but don't invalidate 543 * or commit them (this satisfies 1 and 2 except for the 544 * case where the server crashes after this close but 545 * before the commit RPC, which is felt to be "good 546 * enough". Changing the last argument to nfs_flush() to 547 * a 1 would force a commit operation, if it is felt a 548 * commit is necessary now. 549 * for NQNFS - do nothing now, since 2 is dealt with via leases and 550 * 1 should be dealt with via an fsync() system call for 551 * cases where write errors are important. 552 */ 553 /* ARGSUSED */ 554 int 555 nfs_close(v) 556 void *v; 557 { 558 struct vop_close_args /* { 559 struct vnodeop_desc *a_desc; 560 struct vnode *a_vp; 561 int a_fflag; 562 struct ucred *a_cred; 563 struct proc *a_p; 564 } */ *ap = v; 565 struct vnode *vp = ap->a_vp; 566 struct nfsnode *np = VTONFS(vp); 567 int error = 0; 568 UVMHIST_FUNC("nfs_close"); UVMHIST_CALLED(ubchist); 569 570 if (vp->v_type == VREG) { 571 if ((VFSTONFS(vp->v_mount)->nm_flag & NFSMNT_NQNFS) == 0 && 572 (np->n_flag & NMODIFIED)) { 573 if (NFS_ISV3(vp)) { 574 error = nfs_flush(vp, ap->a_cred, MNT_WAIT, ap->a_p, 0); 575 np->n_flag &= ~NMODIFIED; 576 } else 577 error = nfs_vinvalbuf(vp, V_SAVE, ap->a_cred, ap->a_p, 1); 578 np->n_attrstamp = 0; 579 } 580 if (np->n_flag & NWRITEERR) { 581 np->n_flag &= ~NWRITEERR; 582 error = np->n_error; 583 } 584 } 585 UVMHIST_LOG(ubchist, "returning %d", error,0,0,0); 586 return (error); 587 } 588 589 /* 590 * nfs getattr call from vfs. 591 */ 592 int 593 nfs_getattr(v) 594 void *v; 595 { 596 struct vop_getattr_args /* { 597 struct vnode *a_vp; 598 struct vattr *a_vap; 599 struct ucred *a_cred; 600 struct proc *a_p; 601 } */ *ap = v; 602 struct vnode *vp = ap->a_vp; 603 struct nfsnode *np = VTONFS(vp); 604 caddr_t cp; 605 u_int32_t *tl; 606 int32_t t1, t2; 607 caddr_t bpos, dpos; 608 int error = 0; 609 struct mbuf *mreq, *mrep, *md, *mb; 610 const int v3 = NFS_ISV3(vp); 611 612 /* 613 * Update local times for special files. 614 */ 615 if (np->n_flag & (NACC | NUPD)) 616 np->n_flag |= NCHG; 617 /* 618 * First look in the cache. 619 */ 620 if (nfs_getattrcache(vp, ap->a_vap) == 0) 621 return (0); 622 nfsstats.rpccnt[NFSPROC_GETATTR]++; 623 nfsm_reqhead(np, NFSPROC_GETATTR, NFSX_FH(v3)); 624 nfsm_fhtom(np, v3); 625 nfsm_request(np, NFSPROC_GETATTR, ap->a_p, ap->a_cred); 626 if (!error) { 627 nfsm_loadattr(vp, ap->a_vap, 0); 628 if (vp->v_type == VDIR && 629 ap->a_vap->va_blocksize < NFS_DIRFRAGSIZ) 630 ap->a_vap->va_blocksize = NFS_DIRFRAGSIZ; 631 } 632 nfsm_reqdone; 633 return (error); 634 } 635 636 /* 637 * nfs setattr call. 638 */ 639 int 640 nfs_setattr(v) 641 void *v; 642 { 643 struct vop_setattr_args /* { 644 struct vnodeop_desc *a_desc; 645 struct vnode *a_vp; 646 struct vattr *a_vap; 647 struct ucred *a_cred; 648 struct proc *a_p; 649 } */ *ap = v; 650 struct vnode *vp = ap->a_vp; 651 struct nfsnode *np = VTONFS(vp); 652 struct vattr *vap = ap->a_vap; 653 int error = 0; 654 u_quad_t tsize = 0; 655 656 /* 657 * Setting of flags is not supported. 658 */ 659 if (vap->va_flags != VNOVAL) 660 return (EOPNOTSUPP); 661 662 /* 663 * Disallow write attempts if the filesystem is mounted read-only. 664 */ 665 if ((vap->va_uid != (uid_t)VNOVAL || 666 vap->va_gid != (gid_t)VNOVAL || vap->va_atime.tv_sec != VNOVAL || 667 vap->va_mtime.tv_sec != VNOVAL || vap->va_mode != (mode_t)VNOVAL) && 668 (vp->v_mount->mnt_flag & MNT_RDONLY)) 669 return (EROFS); 670 if (vap->va_size != VNOVAL) { 671 switch (vp->v_type) { 672 case VDIR: 673 return (EISDIR); 674 case VCHR: 675 case VBLK: 676 case VSOCK: 677 case VFIFO: 678 if (vap->va_mtime.tv_sec == VNOVAL && 679 vap->va_atime.tv_sec == VNOVAL && 680 vap->va_mode == (mode_t)VNOVAL && 681 vap->va_uid == (uid_t)VNOVAL && 682 vap->va_gid == (gid_t)VNOVAL) 683 return (0); 684 vap->va_size = VNOVAL; 685 break; 686 default: 687 /* 688 * Disallow write attempts if the filesystem is 689 * mounted read-only. 690 */ 691 if (vp->v_mount->mnt_flag & MNT_RDONLY) 692 return (EROFS); 693 uvm_vnp_setsize(vp, vap->va_size); 694 tsize = np->n_size; 695 np->n_size = vap->va_size; 696 if (vap->va_size == 0) 697 error = nfs_vinvalbuf(vp, 0, 698 ap->a_cred, ap->a_p, 1); 699 else 700 error = nfs_vinvalbuf(vp, V_SAVE, 701 ap->a_cred, ap->a_p, 1); 702 if (error) { 703 uvm_vnp_setsize(vp, tsize); 704 return (error); 705 } 706 np->n_vattr->va_size = vap->va_size; 707 } 708 } else if ((vap->va_mtime.tv_sec != VNOVAL || 709 vap->va_atime.tv_sec != VNOVAL) && 710 vp->v_type == VREG && 711 (error = nfs_vinvalbuf(vp, V_SAVE, ap->a_cred, 712 ap->a_p, 1)) == EINTR) 713 return (error); 714 error = nfs_setattrrpc(vp, vap, ap->a_cred, ap->a_p); 715 if (error && vap->va_size != VNOVAL) { 716 np->n_size = np->n_vattr->va_size = tsize; 717 uvm_vnp_setsize(vp, np->n_size); 718 } 719 VN_KNOTE(vp, NOTE_ATTRIB); 720 return (error); 721 } 722 723 /* 724 * Do an nfs setattr rpc. 725 */ 726 int 727 nfs_setattrrpc(vp, vap, cred, procp) 728 struct vnode *vp; 729 struct vattr *vap; 730 struct ucred *cred; 731 struct proc *procp; 732 { 733 struct nfsv2_sattr *sp; 734 caddr_t cp; 735 int32_t t1, t2; 736 caddr_t bpos, dpos, cp2; 737 u_int32_t *tl; 738 int error = 0, wccflag = NFSV3_WCCRATTR; 739 struct mbuf *mreq, *mrep, *md, *mb; 740 const int v3 = NFS_ISV3(vp); 741 struct nfsnode *np = VTONFS(vp); 742 743 nfsstats.rpccnt[NFSPROC_SETATTR]++; 744 nfsm_reqhead(np, NFSPROC_SETATTR, NFSX_FH(v3) + NFSX_SATTR(v3)); 745 nfsm_fhtom(np, v3); 746 if (v3) { 747 nfsm_v3attrbuild(vap, TRUE); 748 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); 749 *tl = nfs_false; 750 } else { 751 nfsm_build(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 752 if (vap->va_mode == (mode_t)VNOVAL) 753 sp->sa_mode = nfs_xdrneg1; 754 else 755 sp->sa_mode = vtonfsv2_mode(vp->v_type, vap->va_mode); 756 if (vap->va_uid == (uid_t)VNOVAL) 757 sp->sa_uid = nfs_xdrneg1; 758 else 759 sp->sa_uid = txdr_unsigned(vap->va_uid); 760 if (vap->va_gid == (gid_t)VNOVAL) 761 sp->sa_gid = nfs_xdrneg1; 762 else 763 sp->sa_gid = txdr_unsigned(vap->va_gid); 764 sp->sa_size = txdr_unsigned(vap->va_size); 765 txdr_nfsv2time(&vap->va_atime, &sp->sa_atime); 766 txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime); 767 } 768 nfsm_request(np, NFSPROC_SETATTR, procp, cred); 769 if (v3) { 770 nfsm_wcc_data(vp, wccflag, 0); 771 } else 772 nfsm_loadattr(vp, (struct vattr *)0, 0); 773 nfsm_reqdone; 774 return (error); 775 } 776 777 /* 778 * nfs lookup call, one step at a time... 779 * First look in cache 780 * If not found, unlock the directory nfsnode and do the rpc 781 * 782 * This code is full of lock/unlock statements and checks, because 783 * we continue after cache_lookup has finished (we need to check 784 * with the attr cache and do an rpc if it has timed out). This means 785 * that the locking effects of cache_lookup have to be taken into 786 * account. 787 */ 788 int 789 nfs_lookup(v) 790 void *v; 791 { 792 struct vop_lookup_args /* { 793 struct vnodeop_desc *a_desc; 794 struct vnode *a_dvp; 795 struct vnode **a_vpp; 796 struct componentname *a_cnp; 797 } */ *ap = v; 798 struct componentname *cnp = ap->a_cnp; 799 struct vnode *dvp = ap->a_dvp; 800 struct vnode **vpp = ap->a_vpp; 801 int flags; 802 struct vnode *newvp; 803 u_int32_t *tl; 804 caddr_t cp; 805 int32_t t1, t2; 806 caddr_t bpos, dpos, cp2; 807 struct mbuf *mreq, *mrep, *md, *mb; 808 long len; 809 nfsfh_t *fhp; 810 struct nfsnode *np; 811 int lockparent, wantparent, error = 0, attrflag, fhsize; 812 const int v3 = NFS_ISV3(dvp); 813 814 cnp->cn_flags &= ~PDIRUNLOCK; 815 flags = cnp->cn_flags; 816 817 *vpp = NULLVP; 818 newvp = NULLVP; 819 if ((flags & ISLASTCN) && (dvp->v_mount->mnt_flag & MNT_RDONLY) && 820 (cnp->cn_nameiop == DELETE || cnp->cn_nameiop == RENAME)) 821 return (EROFS); 822 if (dvp->v_type != VDIR) 823 return (ENOTDIR); 824 825 lockparent = flags & LOCKPARENT; 826 wantparent = flags & (LOCKPARENT|WANTPARENT); 827 np = VTONFS(dvp); 828 829 /* 830 * Before tediously performing a linear scan of the directory, 831 * check the name cache to see if the directory/name pair 832 * we are looking for is known already. 833 * If the directory/name pair is found in the name cache, 834 * we have to ensure the directory has not changed from 835 * the time the cache entry has been created. If it has, 836 * the cache entry has to be ignored. 837 */ 838 if ((error = cache_lookup(dvp, vpp, cnp)) >= 0) { 839 struct vattr vattr; 840 int err2; 841 842 if (error && error != ENOENT) { 843 *vpp = NULLVP; 844 return error; 845 } 846 847 if (cnp->cn_flags & PDIRUNLOCK) { 848 err2 = vn_lock(dvp, LK_EXCLUSIVE | LK_RETRY); 849 if (err2 != 0) { 850 *vpp = NULLVP; 851 return err2; 852 } 853 cnp->cn_flags &= ~PDIRUNLOCK; 854 } 855 856 err2 = VOP_ACCESS(dvp, VEXEC, cnp->cn_cred, cnp->cn_proc); 857 if (err2 != 0) { 858 if (error == 0) { 859 if (*vpp != dvp) 860 vput(*vpp); 861 else 862 vrele(*vpp); 863 } 864 *vpp = NULLVP; 865 return err2; 866 } 867 868 if (error == ENOENT) { 869 if (!VOP_GETATTR(dvp, &vattr, cnp->cn_cred, 870 cnp->cn_proc) && timespeccmp(&vattr.va_mtime, 871 &VTONFS(dvp)->n_nctime, ==)) 872 return ENOENT; 873 cache_purge(dvp); 874 timespecclear(&np->n_nctime); 875 goto dorpc; 876 } 877 878 newvp = *vpp; 879 if (!VOP_GETATTR(newvp, &vattr, cnp->cn_cred, cnp->cn_proc) 880 && vattr.va_ctime.tv_sec == VTONFS(newvp)->n_ctime) 881 { 882 nfsstats.lookupcache_hits++; 883 if (cnp->cn_nameiop != LOOKUP && (flags & ISLASTCN)) 884 cnp->cn_flags |= SAVENAME; 885 if ((!lockparent || !(flags & ISLASTCN)) && 886 newvp != dvp) 887 VOP_UNLOCK(dvp, 0); 888 return (0); 889 } 890 cache_purge(newvp); 891 if (newvp != dvp) 892 vput(newvp); 893 else 894 vrele(newvp); 895 *vpp = NULLVP; 896 } 897 dorpc: 898 error = 0; 899 newvp = NULLVP; 900 nfsstats.lookupcache_misses++; 901 nfsstats.rpccnt[NFSPROC_LOOKUP]++; 902 len = cnp->cn_namelen; 903 nfsm_reqhead(np, NFSPROC_LOOKUP, 904 NFSX_FH(v3) + NFSX_UNSIGNED + nfsm_rndup(len)); 905 nfsm_fhtom(np, v3); 906 nfsm_strtom(cnp->cn_nameptr, len, NFS_MAXNAMLEN); 907 nfsm_request(np, NFSPROC_LOOKUP, cnp->cn_proc, cnp->cn_cred); 908 if (error) { 909 nfsm_postop_attr(dvp, attrflag, 0); 910 m_freem(mrep); 911 goto nfsmout; 912 } 913 nfsm_getfh(fhp, fhsize, v3); 914 915 /* 916 * Handle RENAME case... 917 */ 918 if (cnp->cn_nameiop == RENAME && wantparent && (flags & ISLASTCN)) { 919 if (NFS_CMPFH(np, fhp, fhsize)) { 920 m_freem(mrep); 921 return (EISDIR); 922 } 923 error = nfs_nget(dvp->v_mount, fhp, fhsize, &np); 924 if (error) { 925 m_freem(mrep); 926 return error; 927 } 928 newvp = NFSTOV(np); 929 if (v3) { 930 nfsm_postop_attr(newvp, attrflag, 0); 931 nfsm_postop_attr(dvp, attrflag, 0); 932 } else 933 nfsm_loadattr(newvp, (struct vattr *)0, 0); 934 *vpp = newvp; 935 m_freem(mrep); 936 cnp->cn_flags |= SAVENAME; 937 if (!lockparent) { 938 VOP_UNLOCK(dvp, 0); 939 cnp->cn_flags |= PDIRUNLOCK; 940 } 941 return (0); 942 } 943 944 /* 945 * The postop attr handling is duplicated for each if case, 946 * because it should be done while dvp is locked (unlocking 947 * dvp is different for each case). 948 */ 949 950 if (NFS_CMPFH(np, fhp, fhsize)) { 951 /* 952 * "." lookup 953 */ 954 VREF(dvp); 955 newvp = dvp; 956 if (v3) { 957 nfsm_postop_attr(newvp, attrflag, 0); 958 nfsm_postop_attr(dvp, attrflag, 0); 959 } else 960 nfsm_loadattr(newvp, (struct vattr *)0, 0); 961 } else if (flags & ISDOTDOT) { 962 /* 963 * ".." lookup 964 */ 965 VOP_UNLOCK(dvp, 0); 966 cnp->cn_flags |= PDIRUNLOCK; 967 968 error = nfs_nget(dvp->v_mount, fhp, fhsize, &np); 969 if (error) { 970 if (vn_lock(dvp, LK_EXCLUSIVE | LK_RETRY) == 0) 971 cnp->cn_flags &= ~PDIRUNLOCK; 972 m_freem(mrep); 973 return error; 974 } 975 newvp = NFSTOV(np); 976 977 if (v3) { 978 nfsm_postop_attr(newvp, attrflag, 0); 979 nfsm_postop_attr(dvp, attrflag, 0); 980 } else 981 nfsm_loadattr(newvp, (struct vattr *)0, 0); 982 983 if (lockparent && (flags & ISLASTCN)) { 984 if ((error = vn_lock(dvp, LK_EXCLUSIVE))) { 985 m_freem(mrep); 986 vput(newvp); 987 return error; 988 } 989 cnp->cn_flags &= ~PDIRUNLOCK; 990 } 991 } else { 992 /* 993 * Other lookups. 994 */ 995 error = nfs_nget(dvp->v_mount, fhp, fhsize, &np); 996 if (error) { 997 m_freem(mrep); 998 return error; 999 } 1000 newvp = NFSTOV(np); 1001 if (v3) { 1002 nfsm_postop_attr(newvp, attrflag, 0); 1003 nfsm_postop_attr(dvp, attrflag, 0); 1004 } else 1005 nfsm_loadattr(newvp, (struct vattr *)0, 0); 1006 if (!lockparent || !(flags & ISLASTCN)) { 1007 VOP_UNLOCK(dvp, 0); 1008 cnp->cn_flags |= PDIRUNLOCK; 1009 } 1010 } 1011 if (cnp->cn_nameiop != LOOKUP && (flags & ISLASTCN)) 1012 cnp->cn_flags |= SAVENAME; 1013 if ((cnp->cn_flags & MAKEENTRY) && 1014 (cnp->cn_nameiop != DELETE || !(flags & ISLASTCN))) { 1015 np->n_ctime = np->n_vattr->va_ctime.tv_sec; 1016 cache_enter(dvp, newvp, cnp); 1017 } 1018 *vpp = newvp; 1019 nfsm_reqdone; 1020 if (error) { 1021 /* 1022 * We get here only because of errors returned by 1023 * the RPC. Otherwise we'll have returned above 1024 * (the nfsm_* macros will jump to nfsm_reqdone 1025 * on error). 1026 */ 1027 if (error == ENOENT && (cnp->cn_flags & MAKEENTRY) && 1028 cnp->cn_nameiop != CREATE) { 1029 if (timespecisset(&VTONFS(dvp)->n_nctime)) 1030 VTONFS(dvp)->n_nctime = 1031 VTONFS(dvp)->n_vattr->va_mtime; 1032 1033 cache_enter(dvp, NULL, cnp); 1034 } 1035 if (newvp != NULLVP) { 1036 vrele(newvp); 1037 if (newvp != dvp) 1038 VOP_UNLOCK(newvp, 0); 1039 } 1040 if ((cnp->cn_nameiop == CREATE || cnp->cn_nameiop == RENAME) && 1041 (flags & ISLASTCN) && error == ENOENT) { 1042 if (dvp->v_mount->mnt_flag & MNT_RDONLY) 1043 error = EROFS; 1044 else 1045 error = EJUSTRETURN; 1046 } 1047 if (cnp->cn_nameiop != LOOKUP && (flags & ISLASTCN)) 1048 cnp->cn_flags |= SAVENAME; 1049 *vpp = NULL; 1050 } 1051 1052 return error; 1053 } 1054 1055 /* 1056 * nfs read call. 1057 * Just call nfs_bioread() to do the work. 1058 */ 1059 int 1060 nfs_read(v) 1061 void *v; 1062 { 1063 struct vop_read_args /* { 1064 struct vnode *a_vp; 1065 struct uio *a_uio; 1066 int a_ioflag; 1067 struct ucred *a_cred; 1068 } */ *ap = v; 1069 struct vnode *vp = ap->a_vp; 1070 1071 if (vp->v_type != VREG) 1072 return (EPERM); 1073 return (nfs_bioread(vp, ap->a_uio, ap->a_ioflag, ap->a_cred, 0)); 1074 } 1075 1076 /* 1077 * nfs readlink call 1078 */ 1079 int 1080 nfs_readlink(v) 1081 void *v; 1082 { 1083 struct vop_readlink_args /* { 1084 struct vnode *a_vp; 1085 struct uio *a_uio; 1086 struct ucred *a_cred; 1087 } */ *ap = v; 1088 struct vnode *vp = ap->a_vp; 1089 1090 if (vp->v_type != VLNK) 1091 return (EPERM); 1092 return (nfs_bioread(vp, ap->a_uio, 0, ap->a_cred, 0)); 1093 } 1094 1095 /* 1096 * Do a readlink rpc. 1097 * Called by nfs_doio() from below the buffer cache. 1098 */ 1099 int 1100 nfs_readlinkrpc(vp, uiop, cred) 1101 struct vnode *vp; 1102 struct uio *uiop; 1103 struct ucred *cred; 1104 { 1105 u_int32_t *tl; 1106 caddr_t cp; 1107 int32_t t1, t2; 1108 caddr_t bpos, dpos, cp2; 1109 int error = 0, attrflag; 1110 uint32_t len; 1111 struct mbuf *mreq, *mrep, *md, *mb; 1112 const int v3 = NFS_ISV3(vp); 1113 struct nfsnode *np = VTONFS(vp); 1114 1115 nfsstats.rpccnt[NFSPROC_READLINK]++; 1116 nfsm_reqhead(np, NFSPROC_READLINK, NFSX_FH(v3)); 1117 nfsm_fhtom(np, v3); 1118 nfsm_request(np, NFSPROC_READLINK, uiop->uio_procp, cred); 1119 if (v3) 1120 nfsm_postop_attr(vp, attrflag, 0); 1121 if (!error) { 1122 if (v3) { 1123 nfsm_dissect(tl, uint32_t *, NFSX_UNSIGNED); 1124 len = fxdr_unsigned(uint32_t, *tl); 1125 if (len > MAXPATHLEN) { 1126 /* 1127 * this pathname is too long for us. 1128 */ 1129 m_freem(mrep); 1130 /* Solaris returns EINVAL. should we follow? */ 1131 error = ENAMETOOLONG; 1132 goto nfsmout; 1133 } 1134 } else { 1135 nfsm_strsiz(len, NFS_MAXPATHLEN); 1136 } 1137 nfsm_mtouio(uiop, len); 1138 } 1139 nfsm_reqdone; 1140 return (error); 1141 } 1142 1143 /* 1144 * nfs read rpc call 1145 * Ditto above 1146 */ 1147 int 1148 nfs_readrpc(vp, uiop) 1149 struct vnode *vp; 1150 struct uio *uiop; 1151 { 1152 u_int32_t *tl; 1153 caddr_t cp; 1154 int32_t t1, t2; 1155 caddr_t bpos, dpos, cp2; 1156 struct mbuf *mreq, *mrep, *md, *mb; 1157 struct nfsmount *nmp; 1158 int error = 0, len, retlen, tsiz, eof, attrflag; 1159 const int v3 = NFS_ISV3(vp); 1160 struct nfsnode *np = VTONFS(vp); 1161 1162 #ifndef nolint 1163 eof = 0; 1164 #endif 1165 nmp = VFSTONFS(vp->v_mount); 1166 tsiz = uiop->uio_resid; 1167 if (uiop->uio_offset + tsiz > nmp->nm_maxfilesize) 1168 return (EFBIG); 1169 while (tsiz > 0) { 1170 nfsstats.rpccnt[NFSPROC_READ]++; 1171 len = (tsiz > nmp->nm_rsize) ? nmp->nm_rsize : tsiz; 1172 nfsm_reqhead(np, NFSPROC_READ, NFSX_FH(v3) + NFSX_UNSIGNED * 3); 1173 nfsm_fhtom(np, v3); 1174 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED * 3); 1175 if (v3) { 1176 txdr_hyper(uiop->uio_offset, tl); 1177 *(tl + 2) = txdr_unsigned(len); 1178 } else { 1179 *tl++ = txdr_unsigned(uiop->uio_offset); 1180 *tl++ = txdr_unsigned(len); 1181 *tl = 0; 1182 } 1183 nfsm_request(np, NFSPROC_READ, uiop->uio_procp, 1184 VTONFS(vp)->n_rcred); 1185 if (v3) { 1186 nfsm_postop_attr(vp, attrflag, NAC_NOTRUNC); 1187 if (error) { 1188 m_freem(mrep); 1189 goto nfsmout; 1190 } 1191 nfsm_dissect(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 1192 eof = fxdr_unsigned(int, *(tl + 1)); 1193 } else 1194 nfsm_loadattr(vp, (struct vattr *)0, NAC_NOTRUNC); 1195 nfsm_strsiz(retlen, nmp->nm_rsize); 1196 nfsm_mtouio(uiop, retlen); 1197 m_freem(mrep); 1198 tsiz -= retlen; 1199 if (v3) { 1200 if (eof || retlen == 0) 1201 tsiz = 0; 1202 } else if (retlen < len) 1203 tsiz = 0; 1204 } 1205 nfsmout: 1206 return (error); 1207 } 1208 1209 struct nfs_writerpc_context { 1210 struct simplelock nwc_slock; 1211 volatile int nwc_mbufcount; 1212 }; 1213 1214 /* 1215 * free mbuf used to refer protected pages while write rpc call. 1216 * called at splvm. 1217 */ 1218 static void 1219 nfs_writerpc_extfree(struct mbuf *m, caddr_t buf, size_t size, void *arg) 1220 { 1221 struct nfs_writerpc_context *ctx = arg; 1222 1223 KASSERT(m != NULL); 1224 KASSERT(ctx != NULL); 1225 pool_cache_put(&mbpool_cache, m); 1226 simple_lock(&ctx->nwc_slock); 1227 if (--ctx->nwc_mbufcount == 0) { 1228 wakeup(ctx); 1229 } 1230 simple_unlock(&ctx->nwc_slock); 1231 } 1232 1233 /* 1234 * nfs write call 1235 */ 1236 int 1237 nfs_writerpc(vp, uiop, iomode, pageprotected, stalewriteverfp) 1238 struct vnode *vp; 1239 struct uio *uiop; 1240 int *iomode; 1241 boolean_t pageprotected; 1242 boolean_t *stalewriteverfp; 1243 { 1244 u_int32_t *tl; 1245 caddr_t cp; 1246 int32_t t1, t2; 1247 caddr_t bpos, dpos, cp2; 1248 struct mbuf *mreq, *mrep, *md, *mb; 1249 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 1250 int error = 0, len, tsiz, wccflag = NFSV3_WCCRATTR, rlen, commit; 1251 const int v3 = NFS_ISV3(vp); 1252 int committed = NFSV3WRITE_FILESYNC; 1253 struct nfsnode *np = VTONFS(vp); 1254 struct nfs_writerpc_context ctx; 1255 int s; 1256 struct lwp *l; 1257 size_t origresid; 1258 1259 simple_lock_init(&ctx.nwc_slock); 1260 ctx.nwc_mbufcount = 1; 1261 1262 if (vp->v_mount->mnt_flag & MNT_RDONLY) { 1263 panic("writerpc readonly vp %p", vp); 1264 } 1265 1266 #ifdef DIAGNOSTIC 1267 if (uiop->uio_iovcnt != 1) 1268 panic("nfs: writerpc iovcnt > 1"); 1269 #endif 1270 tsiz = uiop->uio_resid; 1271 if (uiop->uio_offset + tsiz > nmp->nm_maxfilesize) 1272 return (EFBIG); 1273 if (pageprotected) { 1274 l = curlwp; 1275 PHOLD(l); 1276 } 1277 retry: 1278 origresid = uiop->uio_resid; 1279 KASSERT(origresid == uiop->uio_iov->iov_len); 1280 while (tsiz > 0) { 1281 uint32_t datalen; /* data bytes need to be allocated in mbuf */ 1282 uint32_t backup; 1283 boolean_t stalewriteverf = FALSE; 1284 1285 nfsstats.rpccnt[NFSPROC_WRITE]++; 1286 len = min(tsiz, nmp->nm_wsize); 1287 datalen = pageprotected ? 0 : nfsm_rndup(len); 1288 nfsm_reqhead(np, NFSPROC_WRITE, 1289 NFSX_FH(v3) + 5 * NFSX_UNSIGNED + datalen); 1290 nfsm_fhtom(np, v3); 1291 if (v3) { 1292 nfsm_build(tl, u_int32_t *, 5 * NFSX_UNSIGNED); 1293 txdr_hyper(uiop->uio_offset, tl); 1294 tl += 2; 1295 *tl++ = txdr_unsigned(len); 1296 *tl++ = txdr_unsigned(*iomode); 1297 *tl = txdr_unsigned(len); 1298 } else { 1299 u_int32_t x; 1300 1301 nfsm_build(tl, u_int32_t *, 4 * NFSX_UNSIGNED); 1302 /* Set both "begin" and "current" to non-garbage. */ 1303 x = txdr_unsigned((u_int32_t)uiop->uio_offset); 1304 *tl++ = x; /* "begin offset" */ 1305 *tl++ = x; /* "current offset" */ 1306 x = txdr_unsigned(len); 1307 *tl++ = x; /* total to this offset */ 1308 *tl = x; /* size of this write */ 1309 1310 } 1311 if (pageprotected) { 1312 /* 1313 * since we know pages can't be modified during i/o, 1314 * no need to copy them for us. 1315 */ 1316 struct mbuf *m; 1317 struct iovec *iovp = uiop->uio_iov; 1318 1319 m = m_get(M_WAIT, MT_DATA); 1320 MCLAIM(m, &nfs_mowner); 1321 MEXTADD(m, iovp->iov_base, len, M_MBUF, 1322 nfs_writerpc_extfree, &ctx); 1323 m->m_flags |= M_EXT_ROMAP; 1324 m->m_len = len; 1325 mb->m_next = m; 1326 /* 1327 * no need to maintain mb and bpos here 1328 * because no one care them later. 1329 */ 1330 #if 0 1331 mb = m; 1332 bpos = mtod(caddr_t, mb) + mb->m_len; 1333 #endif 1334 iovp->iov_base = (char *)iovp->iov_base + len; 1335 iovp->iov_len -= len; 1336 uiop->uio_offset += len; 1337 uiop->uio_resid -= len; 1338 s = splvm(); 1339 simple_lock(&ctx.nwc_slock); 1340 ctx.nwc_mbufcount++; 1341 simple_unlock(&ctx.nwc_slock); 1342 splx(s); 1343 } else { 1344 nfsm_uiotom(uiop, len); 1345 } 1346 nfsm_request(np, NFSPROC_WRITE, uiop->uio_procp, 1347 VTONFS(vp)->n_wcred); 1348 if (v3) { 1349 wccflag = NFSV3_WCCCHK; 1350 nfsm_wcc_data(vp, wccflag, NAC_NOTRUNC); 1351 if (!error) { 1352 nfsm_dissect(tl, u_int32_t *, 2 * NFSX_UNSIGNED 1353 + NFSX_V3WRITEVERF); 1354 rlen = fxdr_unsigned(int, *tl++); 1355 if (rlen == 0) { 1356 error = NFSERR_IO; 1357 m_freem(mrep); 1358 break; 1359 } else if (rlen < len) { 1360 backup = len - rlen; 1361 uiop->uio_iov->iov_base = 1362 (caddr_t)uiop->uio_iov->iov_base - 1363 backup; 1364 uiop->uio_iov->iov_len += backup; 1365 uiop->uio_offset -= backup; 1366 uiop->uio_resid += backup; 1367 len = rlen; 1368 } 1369 commit = fxdr_unsigned(int, *tl++); 1370 1371 /* 1372 * Return the lowest committment level 1373 * obtained by any of the RPCs. 1374 */ 1375 if (committed == NFSV3WRITE_FILESYNC) 1376 committed = commit; 1377 else if (committed == NFSV3WRITE_DATASYNC && 1378 commit == NFSV3WRITE_UNSTABLE) 1379 committed = commit; 1380 simple_lock(&nmp->nm_slock); 1381 if ((nmp->nm_iflag & NFSMNT_HASWRITEVERF) == 0){ 1382 memcpy(nmp->nm_writeverf, tl, 1383 NFSX_V3WRITEVERF); 1384 nmp->nm_iflag |= NFSMNT_HASWRITEVERF; 1385 } else if ((nmp->nm_iflag & 1386 NFSMNT_STALEWRITEVERF) || 1387 memcmp(tl, nmp->nm_writeverf, 1388 NFSX_V3WRITEVERF)) { 1389 memcpy(nmp->nm_writeverf, tl, 1390 NFSX_V3WRITEVERF); 1391 /* 1392 * note NFSMNT_STALEWRITEVERF 1393 * if we're the first thread to 1394 * notice it. 1395 */ 1396 if ((nmp->nm_iflag & 1397 NFSMNT_STALEWRITEVERF) == 0) { 1398 stalewriteverf = TRUE; 1399 nmp->nm_iflag |= 1400 NFSMNT_STALEWRITEVERF; 1401 } 1402 } 1403 simple_unlock(&nmp->nm_slock); 1404 } 1405 } else 1406 nfsm_loadattr(vp, (struct vattr *)0, NAC_NOTRUNC); 1407 if (wccflag) 1408 VTONFS(vp)->n_mtime = 1409 VTONFS(vp)->n_vattr->va_mtime.tv_sec; 1410 m_freem(mrep); 1411 if (error) 1412 break; 1413 tsiz -= len; 1414 if (stalewriteverf) { 1415 *stalewriteverfp = TRUE; 1416 stalewriteverf = FALSE; 1417 if (committed == NFSV3WRITE_UNSTABLE && 1418 len != origresid) { 1419 /* 1420 * if our write requests weren't atomic but 1421 * unstable, datas in previous iterations 1422 * might have already been lost now. 1423 * then, we should resend them to nfsd. 1424 */ 1425 backup = origresid - tsiz; 1426 uiop->uio_iov->iov_base = 1427 (caddr_t)uiop->uio_iov->iov_base - backup; 1428 uiop->uio_iov->iov_len += backup; 1429 uiop->uio_offset -= backup; 1430 uiop->uio_resid += backup; 1431 tsiz = origresid; 1432 goto retry; 1433 } 1434 } 1435 } 1436 if (pageprotected) { 1437 /* 1438 * wait until mbufs go away. 1439 * retransmitted mbufs can survive longer than rpc requests 1440 * themselves. 1441 */ 1442 s = splvm(); 1443 simple_lock(&ctx.nwc_slock); 1444 ctx.nwc_mbufcount--; 1445 while (ctx.nwc_mbufcount > 0) { 1446 ltsleep(&ctx, PRIBIO, "nfsmblk", 0, &ctx.nwc_slock); 1447 } 1448 simple_unlock(&ctx.nwc_slock); 1449 splx(s); 1450 PRELE(l); 1451 } 1452 nfsmout: 1453 *iomode = committed; 1454 if (error) 1455 uiop->uio_resid = tsiz; 1456 return (error); 1457 } 1458 1459 /* 1460 * nfs mknod rpc 1461 * For NFS v2 this is a kludge. Use a create rpc but with the IFMT bits of the 1462 * mode set to specify the file type and the size field for rdev. 1463 */ 1464 int 1465 nfs_mknodrpc(dvp, vpp, cnp, vap) 1466 struct vnode *dvp; 1467 struct vnode **vpp; 1468 struct componentname *cnp; 1469 struct vattr *vap; 1470 { 1471 struct nfsv2_sattr *sp; 1472 u_int32_t *tl; 1473 caddr_t cp; 1474 int32_t t1, t2; 1475 struct vnode *newvp = (struct vnode *)0; 1476 struct nfsnode *dnp, *np; 1477 char *cp2; 1478 caddr_t bpos, dpos; 1479 int error = 0, wccflag = NFSV3_WCCRATTR, gotvp = 0; 1480 struct mbuf *mreq, *mrep, *md, *mb; 1481 u_int32_t rdev; 1482 const int v3 = NFS_ISV3(dvp); 1483 1484 if (vap->va_type == VCHR || vap->va_type == VBLK) 1485 rdev = txdr_unsigned(vap->va_rdev); 1486 else if (vap->va_type == VFIFO || vap->va_type == VSOCK) 1487 rdev = nfs_xdrneg1; 1488 else { 1489 VOP_ABORTOP(dvp, cnp); 1490 vput(dvp); 1491 return (EOPNOTSUPP); 1492 } 1493 nfsstats.rpccnt[NFSPROC_MKNOD]++; 1494 dnp = VTONFS(dvp); 1495 nfsm_reqhead(dnp, NFSPROC_MKNOD, NFSX_FH(v3) + 4 * NFSX_UNSIGNED + 1496 + nfsm_rndup(cnp->cn_namelen) + NFSX_SATTR(v3)); 1497 nfsm_fhtom(dnp, v3); 1498 nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN); 1499 if (v3) { 1500 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); 1501 *tl++ = vtonfsv3_type(vap->va_type); 1502 nfsm_v3attrbuild(vap, FALSE); 1503 if (vap->va_type == VCHR || vap->va_type == VBLK) { 1504 nfsm_build(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 1505 *tl++ = txdr_unsigned(major(vap->va_rdev)); 1506 *tl = txdr_unsigned(minor(vap->va_rdev)); 1507 } 1508 } else { 1509 nfsm_build(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 1510 sp->sa_mode = vtonfsv2_mode(vap->va_type, vap->va_mode); 1511 sp->sa_uid = nfs_xdrneg1; 1512 sp->sa_gid = nfs_xdrneg1; 1513 sp->sa_size = rdev; 1514 txdr_nfsv2time(&vap->va_atime, &sp->sa_atime); 1515 txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime); 1516 } 1517 nfsm_request(dnp, NFSPROC_MKNOD, cnp->cn_proc, cnp->cn_cred); 1518 if (!error) { 1519 nfsm_mtofh(dvp, newvp, v3, gotvp); 1520 if (!gotvp) { 1521 error = nfs_lookitup(dvp, cnp->cn_nameptr, 1522 cnp->cn_namelen, cnp->cn_cred, cnp->cn_proc, &np); 1523 if (!error) 1524 newvp = NFSTOV(np); 1525 } 1526 } 1527 if (v3) 1528 nfsm_wcc_data(dvp, wccflag, 0); 1529 nfsm_reqdone; 1530 if (error) { 1531 if (newvp) 1532 vput(newvp); 1533 } else { 1534 if (cnp->cn_flags & MAKEENTRY) 1535 cache_enter(dvp, newvp, cnp); 1536 *vpp = newvp; 1537 } 1538 PNBUF_PUT(cnp->cn_pnbuf); 1539 VTONFS(dvp)->n_flag |= NMODIFIED; 1540 if (!wccflag) 1541 VTONFS(dvp)->n_attrstamp = 0; 1542 vput(dvp); 1543 return (error); 1544 } 1545 1546 /* 1547 * nfs mknod vop 1548 * just call nfs_mknodrpc() to do the work. 1549 */ 1550 /* ARGSUSED */ 1551 int 1552 nfs_mknod(v) 1553 void *v; 1554 { 1555 struct vop_mknod_args /* { 1556 struct vnode *a_dvp; 1557 struct vnode **a_vpp; 1558 struct componentname *a_cnp; 1559 struct vattr *a_vap; 1560 } */ *ap = v; 1561 int error; 1562 1563 error = nfs_mknodrpc(ap->a_dvp, ap->a_vpp, ap->a_cnp, ap->a_vap); 1564 VN_KNOTE(ap->a_dvp, NOTE_WRITE); 1565 return (error); 1566 } 1567 1568 static u_long create_verf; 1569 /* 1570 * nfs file create call 1571 */ 1572 int 1573 nfs_create(v) 1574 void *v; 1575 { 1576 struct vop_create_args /* { 1577 struct vnode *a_dvp; 1578 struct vnode **a_vpp; 1579 struct componentname *a_cnp; 1580 struct vattr *a_vap; 1581 } */ *ap = v; 1582 struct vnode *dvp = ap->a_dvp; 1583 struct vattr *vap = ap->a_vap; 1584 struct componentname *cnp = ap->a_cnp; 1585 struct nfsv2_sattr *sp; 1586 u_int32_t *tl; 1587 caddr_t cp; 1588 int32_t t1, t2; 1589 struct nfsnode *dnp, *np = (struct nfsnode *)0; 1590 struct vnode *newvp = (struct vnode *)0; 1591 caddr_t bpos, dpos, cp2; 1592 int error, wccflag = NFSV3_WCCRATTR, gotvp = 0, fmode = 0; 1593 struct mbuf *mreq, *mrep, *md, *mb; 1594 const int v3 = NFS_ISV3(dvp); 1595 1596 /* 1597 * Oops, not for me.. 1598 */ 1599 if (vap->va_type == VSOCK) 1600 return (nfs_mknodrpc(dvp, ap->a_vpp, cnp, vap)); 1601 1602 #ifdef VA_EXCLUSIVE 1603 if (vap->va_vaflags & VA_EXCLUSIVE) 1604 fmode |= O_EXCL; 1605 #endif 1606 again: 1607 error = 0; 1608 nfsstats.rpccnt[NFSPROC_CREATE]++; 1609 dnp = VTONFS(dvp); 1610 nfsm_reqhead(dnp, NFSPROC_CREATE, NFSX_FH(v3) + 2 * NFSX_UNSIGNED + 1611 nfsm_rndup(cnp->cn_namelen) + NFSX_SATTR(v3)); 1612 nfsm_fhtom(dnp, v3); 1613 nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN); 1614 if (v3) { 1615 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); 1616 if (fmode & O_EXCL) { 1617 *tl = txdr_unsigned(NFSV3CREATE_EXCLUSIVE); 1618 nfsm_build(tl, u_int32_t *, NFSX_V3CREATEVERF); 1619 #ifdef INET 1620 if (TAILQ_FIRST(&in_ifaddr)) 1621 *tl++ = TAILQ_FIRST(&in_ifaddr)->ia_addr.sin_addr.s_addr; 1622 else 1623 *tl++ = create_verf; 1624 #else 1625 *tl++ = create_verf; 1626 #endif 1627 *tl = ++create_verf; 1628 } else { 1629 *tl = txdr_unsigned(NFSV3CREATE_UNCHECKED); 1630 nfsm_v3attrbuild(vap, FALSE); 1631 } 1632 } else { 1633 nfsm_build(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 1634 sp->sa_mode = vtonfsv2_mode(vap->va_type, vap->va_mode); 1635 sp->sa_uid = nfs_xdrneg1; 1636 sp->sa_gid = nfs_xdrneg1; 1637 sp->sa_size = 0; 1638 txdr_nfsv2time(&vap->va_atime, &sp->sa_atime); 1639 txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime); 1640 } 1641 nfsm_request(dnp, NFSPROC_CREATE, cnp->cn_proc, cnp->cn_cred); 1642 if (!error) { 1643 nfsm_mtofh(dvp, newvp, v3, gotvp); 1644 if (!gotvp) { 1645 error = nfs_lookitup(dvp, cnp->cn_nameptr, 1646 cnp->cn_namelen, cnp->cn_cred, cnp->cn_proc, &np); 1647 if (!error) 1648 newvp = NFSTOV(np); 1649 } 1650 } 1651 if (v3) 1652 nfsm_wcc_data(dvp, wccflag, 0); 1653 nfsm_reqdone; 1654 if (error) { 1655 if (v3 && (fmode & O_EXCL) && error == NFSERR_NOTSUPP) { 1656 fmode &= ~O_EXCL; 1657 goto again; 1658 } 1659 if (newvp) 1660 vput(newvp); 1661 } else if (v3 && (fmode & O_EXCL)) 1662 error = nfs_setattrrpc(newvp, vap, cnp->cn_cred, cnp->cn_proc); 1663 if (!error) { 1664 if (cnp->cn_flags & MAKEENTRY) 1665 cache_enter(dvp, newvp, cnp); 1666 *ap->a_vpp = newvp; 1667 } 1668 PNBUF_PUT(cnp->cn_pnbuf); 1669 VTONFS(dvp)->n_flag |= NMODIFIED; 1670 if (!wccflag) 1671 VTONFS(dvp)->n_attrstamp = 0; 1672 VN_KNOTE(ap->a_dvp, NOTE_WRITE); 1673 vput(dvp); 1674 return (error); 1675 } 1676 1677 /* 1678 * nfs file remove call 1679 * To try and make nfs semantics closer to ufs semantics, a file that has 1680 * other processes using the vnode is renamed instead of removed and then 1681 * removed later on the last close. 1682 * - If v_usecount > 1 1683 * If a rename is not already in the works 1684 * call nfs_sillyrename() to set it up 1685 * else 1686 * do the remove rpc 1687 */ 1688 int 1689 nfs_remove(v) 1690 void *v; 1691 { 1692 struct vop_remove_args /* { 1693 struct vnodeop_desc *a_desc; 1694 struct vnode * a_dvp; 1695 struct vnode * a_vp; 1696 struct componentname * a_cnp; 1697 } */ *ap = v; 1698 struct vnode *vp = ap->a_vp; 1699 struct vnode *dvp = ap->a_dvp; 1700 struct componentname *cnp = ap->a_cnp; 1701 struct nfsnode *np = VTONFS(vp); 1702 int error = 0; 1703 struct vattr vattr; 1704 1705 #ifndef DIAGNOSTIC 1706 if ((cnp->cn_flags & HASBUF) == 0) 1707 panic("nfs_remove: no name"); 1708 if (vp->v_usecount < 1) 1709 panic("nfs_remove: bad v_usecount"); 1710 #endif 1711 if (vp->v_type == VDIR) 1712 error = EPERM; 1713 else if (vp->v_usecount == 1 || (np->n_sillyrename && 1714 VOP_GETATTR(vp, &vattr, cnp->cn_cred, cnp->cn_proc) == 0 && 1715 vattr.va_nlink > 1)) { 1716 /* 1717 * Purge the name cache so that the chance of a lookup for 1718 * the name succeeding while the remove is in progress is 1719 * minimized. Without node locking it can still happen, such 1720 * that an I/O op returns ESTALE, but since you get this if 1721 * another host removes the file.. 1722 */ 1723 cache_purge(vp); 1724 /* 1725 * throw away biocache buffers, mainly to avoid 1726 * unnecessary delayed writes later. 1727 */ 1728 error = nfs_vinvalbuf(vp, 0, cnp->cn_cred, cnp->cn_proc, 1); 1729 /* Do the rpc */ 1730 if (error != EINTR) 1731 error = nfs_removerpc(dvp, cnp->cn_nameptr, 1732 cnp->cn_namelen, cnp->cn_cred, cnp->cn_proc); 1733 /* 1734 * Kludge City: If the first reply to the remove rpc is lost.. 1735 * the reply to the retransmitted request will be ENOENT 1736 * since the file was in fact removed 1737 * Therefore, we cheat and return success. 1738 */ 1739 if (error == ENOENT) 1740 error = 0; 1741 } else if (!np->n_sillyrename) 1742 error = nfs_sillyrename(dvp, vp, cnp); 1743 PNBUF_PUT(cnp->cn_pnbuf); 1744 if (!error && nfs_getattrcache(vp, &vattr) == 0 && 1745 vattr.va_nlink == 1) { 1746 np->n_flag |= NREMOVED; 1747 } 1748 np->n_attrstamp = 0; 1749 VN_KNOTE(vp, NOTE_DELETE); 1750 VN_KNOTE(dvp, NOTE_WRITE); 1751 if (dvp == vp) 1752 vrele(vp); 1753 else 1754 vput(vp); 1755 vput(dvp); 1756 return (error); 1757 } 1758 1759 /* 1760 * nfs file remove rpc called from nfs_inactive 1761 */ 1762 int 1763 nfs_removeit(sp) 1764 struct sillyrename *sp; 1765 { 1766 1767 return (nfs_removerpc(sp->s_dvp, sp->s_name, sp->s_namlen, sp->s_cred, 1768 (struct proc *)0)); 1769 } 1770 1771 /* 1772 * Nfs remove rpc, called from nfs_remove() and nfs_removeit(). 1773 */ 1774 int 1775 nfs_removerpc(dvp, name, namelen, cred, proc) 1776 struct vnode *dvp; 1777 const char *name; 1778 int namelen; 1779 struct ucred *cred; 1780 struct proc *proc; 1781 { 1782 u_int32_t *tl; 1783 caddr_t cp; 1784 int32_t t1, t2; 1785 caddr_t bpos, dpos, cp2; 1786 int error = 0, wccflag = NFSV3_WCCRATTR; 1787 struct mbuf *mreq, *mrep, *md, *mb; 1788 const int v3 = NFS_ISV3(dvp); 1789 struct nfsnode *dnp = VTONFS(dvp); 1790 1791 nfsstats.rpccnt[NFSPROC_REMOVE]++; 1792 nfsm_reqhead(dnp, NFSPROC_REMOVE, 1793 NFSX_FH(v3) + NFSX_UNSIGNED + nfsm_rndup(namelen)); 1794 nfsm_fhtom(dnp, v3); 1795 nfsm_strtom(name, namelen, NFS_MAXNAMLEN); 1796 nfsm_request(dnp, NFSPROC_REMOVE, proc, cred); 1797 if (v3) 1798 nfsm_wcc_data(dvp, wccflag, 0); 1799 nfsm_reqdone; 1800 VTONFS(dvp)->n_flag |= NMODIFIED; 1801 if (!wccflag) 1802 VTONFS(dvp)->n_attrstamp = 0; 1803 return (error); 1804 } 1805 1806 /* 1807 * nfs file rename call 1808 */ 1809 int 1810 nfs_rename(v) 1811 void *v; 1812 { 1813 struct vop_rename_args /* { 1814 struct vnode *a_fdvp; 1815 struct vnode *a_fvp; 1816 struct componentname *a_fcnp; 1817 struct vnode *a_tdvp; 1818 struct vnode *a_tvp; 1819 struct componentname *a_tcnp; 1820 } */ *ap = v; 1821 struct vnode *fvp = ap->a_fvp; 1822 struct vnode *tvp = ap->a_tvp; 1823 struct vnode *fdvp = ap->a_fdvp; 1824 struct vnode *tdvp = ap->a_tdvp; 1825 struct componentname *tcnp = ap->a_tcnp; 1826 struct componentname *fcnp = ap->a_fcnp; 1827 int error; 1828 1829 #ifndef DIAGNOSTIC 1830 if ((tcnp->cn_flags & HASBUF) == 0 || 1831 (fcnp->cn_flags & HASBUF) == 0) 1832 panic("nfs_rename: no name"); 1833 #endif 1834 /* Check for cross-device rename */ 1835 if ((fvp->v_mount != tdvp->v_mount) || 1836 (tvp && (fvp->v_mount != tvp->v_mount))) { 1837 error = EXDEV; 1838 goto out; 1839 } 1840 1841 /* 1842 * If the tvp exists and is in use, sillyrename it before doing the 1843 * rename of the new file over it. 1844 */ 1845 if (tvp && tvp->v_usecount > 1 && !VTONFS(tvp)->n_sillyrename && 1846 tvp->v_type != VDIR && !nfs_sillyrename(tdvp, tvp, tcnp)) { 1847 VN_KNOTE(tvp, NOTE_DELETE); 1848 vput(tvp); 1849 tvp = NULL; 1850 } 1851 1852 error = nfs_renamerpc(fdvp, fcnp->cn_nameptr, fcnp->cn_namelen, 1853 tdvp, tcnp->cn_nameptr, tcnp->cn_namelen, tcnp->cn_cred, 1854 tcnp->cn_proc); 1855 1856 VN_KNOTE(fdvp, NOTE_WRITE); 1857 VN_KNOTE(tdvp, NOTE_WRITE); 1858 if (fvp->v_type == VDIR) { 1859 if (tvp != NULL && tvp->v_type == VDIR) 1860 cache_purge(tdvp); 1861 cache_purge(fdvp); 1862 } 1863 out: 1864 if (tdvp == tvp) 1865 vrele(tdvp); 1866 else 1867 vput(tdvp); 1868 if (tvp) 1869 vput(tvp); 1870 vrele(fdvp); 1871 vrele(fvp); 1872 /* 1873 * Kludge: Map ENOENT => 0 assuming that it is a reply to a retry. 1874 */ 1875 if (error == ENOENT) 1876 error = 0; 1877 return (error); 1878 } 1879 1880 /* 1881 * nfs file rename rpc called from nfs_remove() above 1882 */ 1883 int 1884 nfs_renameit(sdvp, scnp, sp) 1885 struct vnode *sdvp; 1886 struct componentname *scnp; 1887 struct sillyrename *sp; 1888 { 1889 return (nfs_renamerpc(sdvp, scnp->cn_nameptr, scnp->cn_namelen, 1890 sdvp, sp->s_name, sp->s_namlen, scnp->cn_cred, scnp->cn_proc)); 1891 } 1892 1893 /* 1894 * Do an nfs rename rpc. Called from nfs_rename() and nfs_renameit(). 1895 */ 1896 int 1897 nfs_renamerpc(fdvp, fnameptr, fnamelen, tdvp, tnameptr, tnamelen, cred, proc) 1898 struct vnode *fdvp; 1899 const char *fnameptr; 1900 int fnamelen; 1901 struct vnode *tdvp; 1902 const char *tnameptr; 1903 int tnamelen; 1904 struct ucred *cred; 1905 struct proc *proc; 1906 { 1907 u_int32_t *tl; 1908 caddr_t cp; 1909 int32_t t1, t2; 1910 caddr_t bpos, dpos, cp2; 1911 int error = 0, fwccflag = NFSV3_WCCRATTR, twccflag = NFSV3_WCCRATTR; 1912 struct mbuf *mreq, *mrep, *md, *mb; 1913 const int v3 = NFS_ISV3(fdvp); 1914 struct nfsnode *fdnp = VTONFS(fdvp); 1915 1916 nfsstats.rpccnt[NFSPROC_RENAME]++; 1917 nfsm_reqhead(fdnp, NFSPROC_RENAME, 1918 (NFSX_FH(v3) + NFSX_UNSIGNED)*2 + nfsm_rndup(fnamelen) + 1919 nfsm_rndup(tnamelen)); 1920 nfsm_fhtom(fdnp, v3); 1921 nfsm_strtom(fnameptr, fnamelen, NFS_MAXNAMLEN); 1922 nfsm_fhtom(VTONFS(tdvp), v3); 1923 nfsm_strtom(tnameptr, tnamelen, NFS_MAXNAMLEN); 1924 nfsm_request(fdnp, NFSPROC_RENAME, proc, cred); 1925 if (v3) { 1926 nfsm_wcc_data(fdvp, fwccflag, 0); 1927 nfsm_wcc_data(tdvp, twccflag, 0); 1928 } 1929 nfsm_reqdone; 1930 VTONFS(fdvp)->n_flag |= NMODIFIED; 1931 VTONFS(tdvp)->n_flag |= NMODIFIED; 1932 if (!fwccflag) 1933 VTONFS(fdvp)->n_attrstamp = 0; 1934 if (!twccflag) 1935 VTONFS(tdvp)->n_attrstamp = 0; 1936 return (error); 1937 } 1938 1939 /* 1940 * nfs hard link create call 1941 */ 1942 int 1943 nfs_link(v) 1944 void *v; 1945 { 1946 struct vop_link_args /* { 1947 struct vnode *a_dvp; 1948 struct vnode *a_vp; 1949 struct componentname *a_cnp; 1950 } */ *ap = v; 1951 struct vnode *vp = ap->a_vp; 1952 struct vnode *dvp = ap->a_dvp; 1953 struct componentname *cnp = ap->a_cnp; 1954 u_int32_t *tl; 1955 caddr_t cp; 1956 int32_t t1, t2; 1957 caddr_t bpos, dpos, cp2; 1958 int error = 0, wccflag = NFSV3_WCCRATTR, attrflag = 0; 1959 struct mbuf *mreq, *mrep, *md, *mb; 1960 /* XXX Should be const and initialised? */ 1961 int v3; 1962 struct nfsnode *np; 1963 1964 if (dvp->v_mount != vp->v_mount) { 1965 VOP_ABORTOP(dvp, cnp); 1966 vput(dvp); 1967 return (EXDEV); 1968 } 1969 if (dvp != vp) { 1970 error = vn_lock(vp, LK_EXCLUSIVE); 1971 if (error != 0) { 1972 VOP_ABORTOP(dvp, cnp); 1973 vput(dvp); 1974 return error; 1975 } 1976 } 1977 1978 /* 1979 * Push all writes to the server, so that the attribute cache 1980 * doesn't get "out of sync" with the server. 1981 * XXX There should be a better way! 1982 */ 1983 VOP_FSYNC(vp, cnp->cn_cred, FSYNC_WAIT, 0, 0, cnp->cn_proc); 1984 1985 v3 = NFS_ISV3(vp); 1986 nfsstats.rpccnt[NFSPROC_LINK]++; 1987 np = VTONFS(vp); 1988 nfsm_reqhead(np, NFSPROC_LINK, 1989 NFSX_FH(v3)*2 + NFSX_UNSIGNED + nfsm_rndup(cnp->cn_namelen)); 1990 nfsm_fhtom(np, v3); 1991 nfsm_fhtom(VTONFS(dvp), v3); 1992 nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN); 1993 nfsm_request(np, NFSPROC_LINK, cnp->cn_proc, cnp->cn_cred); 1994 if (v3) { 1995 nfsm_postop_attr(vp, attrflag, 0); 1996 nfsm_wcc_data(dvp, wccflag, 0); 1997 } 1998 nfsm_reqdone; 1999 PNBUF_PUT(cnp->cn_pnbuf); 2000 VTONFS(dvp)->n_flag |= NMODIFIED; 2001 if (!attrflag) 2002 VTONFS(vp)->n_attrstamp = 0; 2003 if (!wccflag) 2004 VTONFS(dvp)->n_attrstamp = 0; 2005 if (dvp != vp) 2006 VOP_UNLOCK(vp, 0); 2007 VN_KNOTE(vp, NOTE_LINK); 2008 VN_KNOTE(dvp, NOTE_WRITE); 2009 vput(dvp); 2010 /* 2011 * Kludge: Map EEXIST => 0 assuming that it is a reply to a retry. 2012 */ 2013 if (error == EEXIST) 2014 error = 0; 2015 return (error); 2016 } 2017 2018 /* 2019 * nfs symbolic link create call 2020 */ 2021 int 2022 nfs_symlink(v) 2023 void *v; 2024 { 2025 struct vop_symlink_args /* { 2026 struct vnode *a_dvp; 2027 struct vnode **a_vpp; 2028 struct componentname *a_cnp; 2029 struct vattr *a_vap; 2030 char *a_target; 2031 } */ *ap = v; 2032 struct vnode *dvp = ap->a_dvp; 2033 struct vattr *vap = ap->a_vap; 2034 struct componentname *cnp = ap->a_cnp; 2035 struct nfsv2_sattr *sp; 2036 u_int32_t *tl; 2037 caddr_t cp; 2038 int32_t t1, t2; 2039 caddr_t bpos, dpos, cp2; 2040 int slen, error = 0, wccflag = NFSV3_WCCRATTR, gotvp; 2041 struct mbuf *mreq, *mrep, *md, *mb; 2042 struct vnode *newvp = (struct vnode *)0; 2043 const int v3 = NFS_ISV3(dvp); 2044 struct nfsnode *dnp = VTONFS(dvp); 2045 2046 *ap->a_vpp = NULL; 2047 nfsstats.rpccnt[NFSPROC_SYMLINK]++; 2048 slen = strlen(ap->a_target); 2049 nfsm_reqhead(dnp, NFSPROC_SYMLINK, NFSX_FH(v3) + 2*NFSX_UNSIGNED + 2050 nfsm_rndup(cnp->cn_namelen) + nfsm_rndup(slen) + NFSX_SATTR(v3)); 2051 nfsm_fhtom(dnp, v3); 2052 nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN); 2053 if (v3) 2054 nfsm_v3attrbuild(vap, FALSE); 2055 nfsm_strtom(ap->a_target, slen, NFS_MAXPATHLEN); 2056 if (!v3) { 2057 nfsm_build(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 2058 sp->sa_mode = vtonfsv2_mode(VLNK, vap->va_mode); 2059 sp->sa_uid = nfs_xdrneg1; 2060 sp->sa_gid = nfs_xdrneg1; 2061 sp->sa_size = nfs_xdrneg1; 2062 txdr_nfsv2time(&vap->va_atime, &sp->sa_atime); 2063 txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime); 2064 } 2065 nfsm_request(dnp, NFSPROC_SYMLINK, cnp->cn_proc, cnp->cn_cred); 2066 if (v3) { 2067 if (!error) 2068 nfsm_mtofh(dvp, newvp, v3, gotvp); 2069 nfsm_wcc_data(dvp, wccflag, 0); 2070 } 2071 nfsm_reqdone; 2072 /* 2073 * Kludge: Map EEXIST => 0 assuming that it is a reply to a retry. 2074 */ 2075 if (error == EEXIST) 2076 error = 0; 2077 if (error == 0 && newvp == NULL) { 2078 struct nfsnode *np = NULL; 2079 2080 error = nfs_lookitup(dvp, cnp->cn_nameptr, cnp->cn_namelen, 2081 cnp->cn_cred, cnp->cn_proc, &np); 2082 if (error == 0) 2083 newvp = NFSTOV(np); 2084 } 2085 if (error) { 2086 if (newvp != NULL) 2087 vput(newvp); 2088 } else { 2089 *ap->a_vpp = newvp; 2090 } 2091 PNBUF_PUT(cnp->cn_pnbuf); 2092 VTONFS(dvp)->n_flag |= NMODIFIED; 2093 if (!wccflag) 2094 VTONFS(dvp)->n_attrstamp = 0; 2095 VN_KNOTE(dvp, NOTE_WRITE); 2096 vput(dvp); 2097 return (error); 2098 } 2099 2100 /* 2101 * nfs make dir call 2102 */ 2103 int 2104 nfs_mkdir(v) 2105 void *v; 2106 { 2107 struct vop_mkdir_args /* { 2108 struct vnode *a_dvp; 2109 struct vnode **a_vpp; 2110 struct componentname *a_cnp; 2111 struct vattr *a_vap; 2112 } */ *ap = v; 2113 struct vnode *dvp = ap->a_dvp; 2114 struct vattr *vap = ap->a_vap; 2115 struct componentname *cnp = ap->a_cnp; 2116 struct nfsv2_sattr *sp; 2117 u_int32_t *tl; 2118 caddr_t cp; 2119 int32_t t1, t2; 2120 int len; 2121 struct nfsnode *dnp = VTONFS(dvp), *np = (struct nfsnode *)0; 2122 struct vnode *newvp = (struct vnode *)0; 2123 caddr_t bpos, dpos, cp2; 2124 int error = 0, wccflag = NFSV3_WCCRATTR; 2125 int gotvp = 0; 2126 struct mbuf *mreq, *mrep, *md, *mb; 2127 const int v3 = NFS_ISV3(dvp); 2128 2129 len = cnp->cn_namelen; 2130 nfsstats.rpccnt[NFSPROC_MKDIR]++; 2131 nfsm_reqhead(dnp, NFSPROC_MKDIR, 2132 NFSX_FH(v3) + NFSX_UNSIGNED + nfsm_rndup(len) + NFSX_SATTR(v3)); 2133 nfsm_fhtom(dnp, v3); 2134 nfsm_strtom(cnp->cn_nameptr, len, NFS_MAXNAMLEN); 2135 if (v3) { 2136 nfsm_v3attrbuild(vap, FALSE); 2137 } else { 2138 nfsm_build(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 2139 sp->sa_mode = vtonfsv2_mode(VDIR, vap->va_mode); 2140 sp->sa_uid = nfs_xdrneg1; 2141 sp->sa_gid = nfs_xdrneg1; 2142 sp->sa_size = nfs_xdrneg1; 2143 txdr_nfsv2time(&vap->va_atime, &sp->sa_atime); 2144 txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime); 2145 } 2146 nfsm_request(dnp, NFSPROC_MKDIR, cnp->cn_proc, cnp->cn_cred); 2147 if (!error) 2148 nfsm_mtofh(dvp, newvp, v3, gotvp); 2149 if (v3) 2150 nfsm_wcc_data(dvp, wccflag, 0); 2151 nfsm_reqdone; 2152 VTONFS(dvp)->n_flag |= NMODIFIED; 2153 if (!wccflag) 2154 VTONFS(dvp)->n_attrstamp = 0; 2155 /* 2156 * Kludge: Map EEXIST => 0 assuming that you have a reply to a retry 2157 * if we can succeed in looking up the directory. 2158 */ 2159 if (error == EEXIST || (!error && !gotvp)) { 2160 if (newvp) { 2161 vput(newvp); 2162 newvp = (struct vnode *)0; 2163 } 2164 error = nfs_lookitup(dvp, cnp->cn_nameptr, len, cnp->cn_cred, 2165 cnp->cn_proc, &np); 2166 if (!error) { 2167 newvp = NFSTOV(np); 2168 if (newvp->v_type != VDIR) 2169 error = EEXIST; 2170 } 2171 } 2172 if (error) { 2173 if (newvp) 2174 vput(newvp); 2175 } else { 2176 VN_KNOTE(dvp, NOTE_WRITE | NOTE_LINK); 2177 if (cnp->cn_flags & MAKEENTRY) 2178 cache_enter(dvp, newvp, cnp); 2179 *ap->a_vpp = newvp; 2180 } 2181 PNBUF_PUT(cnp->cn_pnbuf); 2182 vput(dvp); 2183 return (error); 2184 } 2185 2186 /* 2187 * nfs remove directory call 2188 */ 2189 int 2190 nfs_rmdir(v) 2191 void *v; 2192 { 2193 struct vop_rmdir_args /* { 2194 struct vnode *a_dvp; 2195 struct vnode *a_vp; 2196 struct componentname *a_cnp; 2197 } */ *ap = v; 2198 struct vnode *vp = ap->a_vp; 2199 struct vnode *dvp = ap->a_dvp; 2200 struct componentname *cnp = ap->a_cnp; 2201 u_int32_t *tl; 2202 caddr_t cp; 2203 int32_t t1, t2; 2204 caddr_t bpos, dpos, cp2; 2205 int error = 0, wccflag = NFSV3_WCCRATTR; 2206 struct mbuf *mreq, *mrep, *md, *mb; 2207 const int v3 = NFS_ISV3(dvp); 2208 struct nfsnode *dnp; 2209 2210 if (dvp == vp) { 2211 vrele(dvp); 2212 vput(dvp); 2213 PNBUF_PUT(cnp->cn_pnbuf); 2214 return (EINVAL); 2215 } 2216 nfsstats.rpccnt[NFSPROC_RMDIR]++; 2217 dnp = VTONFS(dvp); 2218 nfsm_reqhead(dnp, NFSPROC_RMDIR, 2219 NFSX_FH(v3) + NFSX_UNSIGNED + nfsm_rndup(cnp->cn_namelen)); 2220 nfsm_fhtom(dnp, v3); 2221 nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN); 2222 nfsm_request(dnp, NFSPROC_RMDIR, cnp->cn_proc, cnp->cn_cred); 2223 if (v3) 2224 nfsm_wcc_data(dvp, wccflag, 0); 2225 nfsm_reqdone; 2226 PNBUF_PUT(cnp->cn_pnbuf); 2227 VTONFS(dvp)->n_flag |= NMODIFIED; 2228 if (!wccflag) 2229 VTONFS(dvp)->n_attrstamp = 0; 2230 VN_KNOTE(dvp, NOTE_WRITE | NOTE_LINK); 2231 VN_KNOTE(vp, NOTE_DELETE); 2232 cache_purge(dvp); 2233 cache_purge(vp); 2234 vput(vp); 2235 vput(dvp); 2236 /* 2237 * Kludge: Map ENOENT => 0 assuming that you have a reply to a retry. 2238 */ 2239 if (error == ENOENT) 2240 error = 0; 2241 return (error); 2242 } 2243 2244 /* 2245 * nfs readdir call 2246 */ 2247 int 2248 nfs_readdir(v) 2249 void *v; 2250 { 2251 struct vop_readdir_args /* { 2252 struct vnode *a_vp; 2253 struct uio *a_uio; 2254 struct ucred *a_cred; 2255 int *a_eofflag; 2256 off_t **a_cookies; 2257 int *a_ncookies; 2258 } */ *ap = v; 2259 struct vnode *vp = ap->a_vp; 2260 struct uio *uio = ap->a_uio; 2261 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 2262 char *base = uio->uio_iov->iov_base; 2263 int tresid, error; 2264 size_t count, lost; 2265 struct dirent *dp; 2266 off_t *cookies = NULL; 2267 int ncookies = 0, nc; 2268 2269 if (vp->v_type != VDIR) 2270 return (EPERM); 2271 2272 lost = uio->uio_resid & (NFS_DIRFRAGSIZ - 1); 2273 count = uio->uio_resid - lost; 2274 if (count <= 0) 2275 return (EINVAL); 2276 2277 /* 2278 * Call nfs_bioread() to do the real work. 2279 */ 2280 tresid = uio->uio_resid = count; 2281 error = nfs_bioread(vp, uio, 0, ap->a_cred, 2282 ap->a_cookies ? NFSBIO_CACHECOOKIES : 0); 2283 2284 if (!error && ap->a_cookies) { 2285 ncookies = count / 16; 2286 cookies = malloc(sizeof (off_t) * ncookies, M_TEMP, M_WAITOK); 2287 *ap->a_cookies = cookies; 2288 } 2289 2290 if (!error && uio->uio_resid == tresid) { 2291 uio->uio_resid += lost; 2292 nfsstats.direofcache_misses++; 2293 if (ap->a_cookies) 2294 *ap->a_ncookies = 0; 2295 *ap->a_eofflag = 1; 2296 return (0); 2297 } 2298 2299 if (!error && ap->a_cookies) { 2300 /* 2301 * Only the NFS server and emulations use cookies, and they 2302 * load the directory block into system space, so we can 2303 * just look at it directly. 2304 */ 2305 if (uio->uio_segflg != UIO_SYSSPACE || uio->uio_iovcnt != 1) 2306 panic("nfs_readdir: lost in space"); 2307 for (nc = 0; ncookies-- && 2308 base < (char *)uio->uio_iov->iov_base; nc++){ 2309 dp = (struct dirent *) base; 2310 if (dp->d_reclen == 0) 2311 break; 2312 if (nmp->nm_flag & NFSMNT_XLATECOOKIE) 2313 *(cookies++) = (off_t)NFS_GETCOOKIE32(dp); 2314 else 2315 *(cookies++) = NFS_GETCOOKIE(dp); 2316 base += dp->d_reclen; 2317 } 2318 uio->uio_resid += 2319 ((caddr_t)uio->uio_iov->iov_base - base); 2320 uio->uio_iov->iov_len += 2321 ((caddr_t)uio->uio_iov->iov_base - base); 2322 uio->uio_iov->iov_base = base; 2323 *ap->a_ncookies = nc; 2324 } 2325 2326 uio->uio_resid += lost; 2327 *ap->a_eofflag = 0; 2328 return (error); 2329 } 2330 2331 /* 2332 * Readdir rpc call. 2333 * Called from below the buffer cache by nfs_doio(). 2334 */ 2335 int 2336 nfs_readdirrpc(vp, uiop, cred) 2337 struct vnode *vp; 2338 struct uio *uiop; 2339 struct ucred *cred; 2340 { 2341 int len, left; 2342 struct dirent *dp = NULL; 2343 u_int32_t *tl; 2344 caddr_t cp; 2345 int32_t t1, t2; 2346 caddr_t bpos, dpos, cp2; 2347 struct mbuf *mreq, *mrep, *md, *mb; 2348 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 2349 struct nfsnode *dnp = VTONFS(vp); 2350 u_quad_t fileno; 2351 int error = 0, tlen, more_dirs = 1, blksiz = 0, bigenough = 1; 2352 int attrflag, nrpcs = 0, reclen; 2353 const int v3 = NFS_ISV3(vp); 2354 2355 #ifdef DIAGNOSTIC 2356 /* 2357 * Should be called from buffer cache, so only amount of 2358 * NFS_DIRBLKSIZ will be requested. 2359 */ 2360 if (uiop->uio_iovcnt != 1 || (uiop->uio_resid & (NFS_DIRBLKSIZ - 1))) 2361 panic("nfs readdirrpc bad uio"); 2362 #endif 2363 2364 /* 2365 * Loop around doing readdir rpc's of size nm_readdirsize 2366 * truncated to a multiple of NFS_DIRFRAGSIZ. 2367 * The stopping criteria is EOF or buffer full. 2368 */ 2369 while (more_dirs && bigenough) { 2370 /* 2371 * Heuristic: don't bother to do another RPC to further 2372 * fill up this block if there is not much room left. (< 50% 2373 * of the readdir RPC size). This wastes some buffer space 2374 * but can save up to 50% in RPC calls. 2375 */ 2376 if (nrpcs > 0 && uiop->uio_resid < (nmp->nm_readdirsize / 2)) { 2377 bigenough = 0; 2378 break; 2379 } 2380 nfsstats.rpccnt[NFSPROC_READDIR]++; 2381 nfsm_reqhead(dnp, NFSPROC_READDIR, NFSX_FH(v3) + 2382 NFSX_READDIR(v3)); 2383 nfsm_fhtom(dnp, v3); 2384 if (v3) { 2385 nfsm_build(tl, u_int32_t *, 5 * NFSX_UNSIGNED); 2386 if (nmp->nm_iflag & NFSMNT_SWAPCOOKIE) { 2387 txdr_swapcookie3(uiop->uio_offset, tl); 2388 } else { 2389 txdr_cookie3(uiop->uio_offset, tl); 2390 } 2391 tl += 2; 2392 *tl++ = dnp->n_cookieverf.nfsuquad[0]; 2393 *tl++ = dnp->n_cookieverf.nfsuquad[1]; 2394 } else { 2395 nfsm_build(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 2396 *tl++ = txdr_unsigned(uiop->uio_offset); 2397 } 2398 *tl = txdr_unsigned(nmp->nm_readdirsize); 2399 nfsm_request(dnp, NFSPROC_READDIR, uiop->uio_procp, cred); 2400 nrpcs++; 2401 if (v3) { 2402 nfsm_postop_attr(vp, attrflag, 0); 2403 if (!error) { 2404 nfsm_dissect(tl, u_int32_t *, 2405 2 * NFSX_UNSIGNED); 2406 dnp->n_cookieverf.nfsuquad[0] = *tl++; 2407 dnp->n_cookieverf.nfsuquad[1] = *tl; 2408 } else { 2409 m_freem(mrep); 2410 goto nfsmout; 2411 } 2412 } 2413 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 2414 more_dirs = fxdr_unsigned(int, *tl); 2415 2416 /* loop thru the dir entries, doctoring them to 4bsd form */ 2417 while (more_dirs && bigenough) { 2418 if (v3) { 2419 nfsm_dissect(tl, u_int32_t *, 2420 3 * NFSX_UNSIGNED); 2421 fileno = fxdr_hyper(tl); 2422 len = fxdr_unsigned(int, *(tl + 2)); 2423 } else { 2424 nfsm_dissect(tl, u_int32_t *, 2425 2 * NFSX_UNSIGNED); 2426 fileno = fxdr_unsigned(u_quad_t, *tl++); 2427 len = fxdr_unsigned(int, *tl); 2428 } 2429 if (len <= 0 || len > NFS_MAXNAMLEN) { 2430 error = EBADRPC; 2431 m_freem(mrep); 2432 goto nfsmout; 2433 } 2434 tlen = nfsm_rndup(len); 2435 if (tlen == len) 2436 tlen += 4; /* To ensure null termination */ 2437 tlen += sizeof (off_t) + sizeof (int); 2438 reclen = ALIGN(tlen + DIRHDSIZ); 2439 tlen = reclen - DIRHDSIZ; 2440 left = NFS_DIRFRAGSIZ - blksiz; 2441 if (reclen > left) { 2442 dp->d_reclen += left; 2443 uiop->uio_iov->iov_base = 2444 (caddr_t)uiop->uio_iov->iov_base + left; 2445 uiop->uio_iov->iov_len -= left; 2446 uiop->uio_resid -= left; 2447 blksiz = 0; 2448 NFS_STASHCOOKIE(dp, uiop->uio_offset); 2449 } 2450 if (reclen > uiop->uio_resid) 2451 bigenough = 0; 2452 if (bigenough) { 2453 dp = (struct dirent *)uiop->uio_iov->iov_base; 2454 dp->d_fileno = (int)fileno; 2455 dp->d_namlen = len; 2456 dp->d_reclen = reclen; 2457 dp->d_type = DT_UNKNOWN; 2458 blksiz += dp->d_reclen; 2459 if (blksiz == NFS_DIRFRAGSIZ) 2460 blksiz = 0; 2461 uiop->uio_resid -= DIRHDSIZ; 2462 uiop->uio_iov->iov_base = 2463 (caddr_t)uiop->uio_iov->iov_base + DIRHDSIZ; 2464 uiop->uio_iov->iov_len -= DIRHDSIZ; 2465 nfsm_mtouio(uiop, len); 2466 cp = uiop->uio_iov->iov_base; 2467 tlen -= len; 2468 *cp = '\0'; /* null terminate */ 2469 uiop->uio_iov->iov_base = 2470 (caddr_t)uiop->uio_iov->iov_base + tlen; 2471 uiop->uio_iov->iov_len -= tlen; 2472 uiop->uio_resid -= tlen; 2473 } else 2474 nfsm_adv(nfsm_rndup(len)); 2475 if (v3) { 2476 nfsm_dissect(tl, u_int32_t *, 2477 3 * NFSX_UNSIGNED); 2478 } else { 2479 nfsm_dissect(tl, u_int32_t *, 2480 2 * NFSX_UNSIGNED); 2481 } 2482 if (bigenough) { 2483 if (v3) { 2484 if (nmp->nm_iflag & NFSMNT_SWAPCOOKIE) 2485 uiop->uio_offset = 2486 fxdr_swapcookie3(tl); 2487 else 2488 uiop->uio_offset = 2489 fxdr_cookie3(tl); 2490 } 2491 else { 2492 uiop->uio_offset = 2493 fxdr_unsigned(off_t, *tl); 2494 } 2495 NFS_STASHCOOKIE(dp, uiop->uio_offset); 2496 } 2497 if (v3) 2498 tl += 2; 2499 else 2500 tl++; 2501 more_dirs = fxdr_unsigned(int, *tl); 2502 } 2503 /* 2504 * If at end of rpc data, get the eof boolean 2505 */ 2506 if (!more_dirs) { 2507 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 2508 more_dirs = (fxdr_unsigned(int, *tl) == 0); 2509 } 2510 m_freem(mrep); 2511 } 2512 /* 2513 * Fill last record, iff any, out to a multiple of NFS_DIRFRAGSIZ 2514 * by increasing d_reclen for the last record. 2515 */ 2516 if (blksiz > 0) { 2517 left = NFS_DIRFRAGSIZ - blksiz; 2518 dp->d_reclen += left; 2519 NFS_STASHCOOKIE(dp, uiop->uio_offset); 2520 uiop->uio_iov->iov_base = (caddr_t)uiop->uio_iov->iov_base + 2521 left; 2522 uiop->uio_iov->iov_len -= left; 2523 uiop->uio_resid -= left; 2524 } 2525 2526 /* 2527 * We are now either at the end of the directory or have filled the 2528 * block. 2529 */ 2530 if (bigenough) 2531 dnp->n_direofoffset = uiop->uio_offset; 2532 nfsmout: 2533 return (error); 2534 } 2535 2536 /* 2537 * NFS V3 readdir plus RPC. Used in place of nfs_readdirrpc(). 2538 */ 2539 int 2540 nfs_readdirplusrpc(vp, uiop, cred) 2541 struct vnode *vp; 2542 struct uio *uiop; 2543 struct ucred *cred; 2544 { 2545 int len, left; 2546 struct dirent *dp = NULL; 2547 u_int32_t *tl; 2548 caddr_t cp; 2549 int32_t t1, t2; 2550 struct vnode *newvp; 2551 caddr_t bpos, dpos, cp2; 2552 struct mbuf *mreq, *mrep, *md, *mb; 2553 struct nameidata nami, *ndp = &nami; 2554 struct componentname *cnp = &ndp->ni_cnd; 2555 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 2556 struct nfsnode *dnp = VTONFS(vp), *np; 2557 nfsfh_t *fhp; 2558 u_quad_t fileno; 2559 int error = 0, tlen, more_dirs = 1, blksiz = 0, doit, bigenough = 1, i; 2560 int attrflag, fhsize, nrpcs = 0, reclen; 2561 struct nfs_fattr fattr, *fp; 2562 2563 #ifdef DIAGNOSTIC 2564 if (uiop->uio_iovcnt != 1 || (uiop->uio_resid & (NFS_DIRBLKSIZ - 1))) 2565 panic("nfs readdirplusrpc bad uio"); 2566 #endif 2567 ndp->ni_dvp = vp; 2568 newvp = NULLVP; 2569 2570 /* 2571 * Loop around doing readdir rpc's of size nm_readdirsize 2572 * truncated to a multiple of NFS_DIRFRAGSIZ. 2573 * The stopping criteria is EOF or buffer full. 2574 */ 2575 while (more_dirs && bigenough) { 2576 if (nrpcs > 0 && uiop->uio_resid < (nmp->nm_readdirsize / 2)) { 2577 bigenough = 0; 2578 break; 2579 } 2580 nfsstats.rpccnt[NFSPROC_READDIRPLUS]++; 2581 nfsm_reqhead(dnp, NFSPROC_READDIRPLUS, 2582 NFSX_FH(1) + 6 * NFSX_UNSIGNED); 2583 nfsm_fhtom(dnp, 1); 2584 nfsm_build(tl, u_int32_t *, 6 * NFSX_UNSIGNED); 2585 if (nmp->nm_iflag & NFSMNT_SWAPCOOKIE) { 2586 txdr_swapcookie3(uiop->uio_offset, tl); 2587 } else { 2588 txdr_cookie3(uiop->uio_offset, tl); 2589 } 2590 tl += 2; 2591 *tl++ = dnp->n_cookieverf.nfsuquad[0]; 2592 *tl++ = dnp->n_cookieverf.nfsuquad[1]; 2593 *tl++ = txdr_unsigned(nmp->nm_readdirsize); 2594 *tl = txdr_unsigned(nmp->nm_rsize); 2595 nfsm_request(dnp, NFSPROC_READDIRPLUS, uiop->uio_procp, cred); 2596 nfsm_postop_attr(vp, attrflag, 0); 2597 if (error) { 2598 m_freem(mrep); 2599 goto nfsmout; 2600 } 2601 nrpcs++; 2602 nfsm_dissect(tl, u_int32_t *, 3 * NFSX_UNSIGNED); 2603 dnp->n_cookieverf.nfsuquad[0] = *tl++; 2604 dnp->n_cookieverf.nfsuquad[1] = *tl++; 2605 more_dirs = fxdr_unsigned(int, *tl); 2606 2607 /* loop thru the dir entries, doctoring them to 4bsd form */ 2608 while (more_dirs && bigenough) { 2609 nfsm_dissect(tl, u_int32_t *, 3 * NFSX_UNSIGNED); 2610 fileno = fxdr_hyper(tl); 2611 len = fxdr_unsigned(int, *(tl + 2)); 2612 if (len <= 0 || len > NFS_MAXNAMLEN) { 2613 error = EBADRPC; 2614 m_freem(mrep); 2615 goto nfsmout; 2616 } 2617 tlen = nfsm_rndup(len); 2618 if (tlen == len) 2619 tlen += 4; /* To ensure null termination*/ 2620 tlen += sizeof (off_t) + sizeof (int); 2621 reclen = ALIGN(tlen + DIRHDSIZ); 2622 tlen = reclen - DIRHDSIZ; 2623 left = NFS_DIRFRAGSIZ - blksiz; 2624 if (reclen > left) { 2625 /* 2626 * DIRFRAGSIZ is aligned, no need to align 2627 * again here. 2628 */ 2629 dp->d_reclen += left; 2630 uiop->uio_iov->iov_base = 2631 (caddr_t)uiop->uio_iov->iov_base + left; 2632 uiop->uio_iov->iov_len -= left; 2633 uiop->uio_resid -= left; 2634 NFS_STASHCOOKIE(dp, uiop->uio_offset); 2635 blksiz = 0; 2636 } 2637 if (reclen > uiop->uio_resid) 2638 bigenough = 0; 2639 if (bigenough) { 2640 dp = (struct dirent *)uiop->uio_iov->iov_base; 2641 dp->d_fileno = (int)fileno; 2642 dp->d_namlen = len; 2643 dp->d_reclen = reclen; 2644 dp->d_type = DT_UNKNOWN; 2645 blksiz += dp->d_reclen; 2646 if (blksiz == NFS_DIRFRAGSIZ) 2647 blksiz = 0; 2648 uiop->uio_resid -= DIRHDSIZ; 2649 uiop->uio_iov->iov_base = 2650 (caddr_t)uiop->uio_iov->iov_base + 2651 DIRHDSIZ; 2652 uiop->uio_iov->iov_len -= DIRHDSIZ; 2653 cnp->cn_nameptr = uiop->uio_iov->iov_base; 2654 cnp->cn_namelen = len; 2655 nfsm_mtouio(uiop, len); 2656 cp = uiop->uio_iov->iov_base; 2657 tlen -= len; 2658 *cp = '\0'; 2659 uiop->uio_iov->iov_base = 2660 (caddr_t)uiop->uio_iov->iov_base + tlen; 2661 uiop->uio_iov->iov_len -= tlen; 2662 uiop->uio_resid -= tlen; 2663 } else 2664 nfsm_adv(nfsm_rndup(len)); 2665 nfsm_dissect(tl, u_int32_t *, 3 * NFSX_UNSIGNED); 2666 if (bigenough) { 2667 if (nmp->nm_iflag & NFSMNT_SWAPCOOKIE) 2668 uiop->uio_offset = 2669 fxdr_swapcookie3(tl); 2670 else 2671 uiop->uio_offset = 2672 fxdr_cookie3(tl); 2673 NFS_STASHCOOKIE(dp, uiop->uio_offset); 2674 } 2675 tl += 2; 2676 2677 /* 2678 * Since the attributes are before the file handle 2679 * (sigh), we must skip over the attributes and then 2680 * come back and get them. 2681 */ 2682 attrflag = fxdr_unsigned(int, *tl); 2683 if (attrflag) { 2684 nfsm_dissect(fp, struct nfs_fattr *, NFSX_V3FATTR); 2685 memcpy(&fattr, fp, NFSX_V3FATTR); 2686 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 2687 doit = fxdr_unsigned(int, *tl); 2688 if (doit) { 2689 nfsm_getfh(fhp, fhsize, 1); 2690 if (NFS_CMPFH(dnp, fhp, fhsize)) { 2691 VREF(vp); 2692 newvp = vp; 2693 np = dnp; 2694 } else { 2695 error = nfs_nget(vp->v_mount, fhp, 2696 fhsize, &np); 2697 if (!error) 2698 newvp = NFSTOV(np); 2699 } 2700 if (!error) { 2701 const char *cp; 2702 2703 nfs_loadattrcache(&newvp, &fattr, 0, 0); 2704 dp->d_type = 2705 IFTODT(VTTOIF(np->n_vattr->va_type)); 2706 ndp->ni_vp = newvp; 2707 cp = cnp->cn_nameptr + cnp->cn_namelen; 2708 cnp->cn_hash = 2709 namei_hash(cnp->cn_nameptr, &cp); 2710 if (cnp->cn_namelen <= NCHNAMLEN) 2711 cache_enter(ndp->ni_dvp, ndp->ni_vp, 2712 cnp); 2713 } 2714 } 2715 } else { 2716 /* Just skip over the file handle */ 2717 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 2718 i = fxdr_unsigned(int, *tl); 2719 nfsm_adv(nfsm_rndup(i)); 2720 } 2721 if (newvp != NULLVP) { 2722 if (newvp == vp) 2723 vrele(newvp); 2724 else 2725 vput(newvp); 2726 newvp = NULLVP; 2727 } 2728 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 2729 more_dirs = fxdr_unsigned(int, *tl); 2730 } 2731 /* 2732 * If at end of rpc data, get the eof boolean 2733 */ 2734 if (!more_dirs) { 2735 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 2736 more_dirs = (fxdr_unsigned(int, *tl) == 0); 2737 } 2738 m_freem(mrep); 2739 } 2740 /* 2741 * Fill last record, iff any, out to a multiple of NFS_DIRFRAGSIZ 2742 * by increasing d_reclen for the last record. 2743 */ 2744 if (blksiz > 0) { 2745 left = NFS_DIRFRAGSIZ - blksiz; 2746 dp->d_reclen += left; 2747 NFS_STASHCOOKIE(dp, uiop->uio_offset); 2748 uiop->uio_iov->iov_base = (caddr_t)uiop->uio_iov->iov_base + 2749 left; 2750 uiop->uio_iov->iov_len -= left; 2751 uiop->uio_resid -= left; 2752 } 2753 2754 /* 2755 * We are now either at the end of the directory or have filled the 2756 * block. 2757 */ 2758 if (bigenough) 2759 dnp->n_direofoffset = uiop->uio_offset; 2760 nfsmout: 2761 if (newvp != NULLVP) { 2762 if(newvp == vp) 2763 vrele(newvp); 2764 else 2765 vput(newvp); 2766 } 2767 return (error); 2768 } 2769 static char hextoasc[] = "0123456789abcdef"; 2770 2771 /* 2772 * Silly rename. To make the NFS filesystem that is stateless look a little 2773 * more like the "ufs" a remove of an active vnode is translated to a rename 2774 * to a funny looking filename that is removed by nfs_inactive on the 2775 * nfsnode. There is the potential for another process on a different client 2776 * to create the same funny name between the nfs_lookitup() fails and the 2777 * nfs_rename() completes, but... 2778 */ 2779 int 2780 nfs_sillyrename(dvp, vp, cnp) 2781 struct vnode *dvp, *vp; 2782 struct componentname *cnp; 2783 { 2784 struct sillyrename *sp; 2785 struct nfsnode *np; 2786 int error; 2787 short pid; 2788 2789 cache_purge(dvp); 2790 np = VTONFS(vp); 2791 #ifndef DIAGNOSTIC 2792 if (vp->v_type == VDIR) 2793 panic("nfs: sillyrename dir"); 2794 #endif 2795 MALLOC(sp, struct sillyrename *, sizeof (struct sillyrename), 2796 M_NFSREQ, M_WAITOK); 2797 sp->s_cred = crdup(cnp->cn_cred); 2798 sp->s_dvp = dvp; 2799 VREF(dvp); 2800 2801 /* Fudge together a funny name */ 2802 pid = cnp->cn_proc->p_pid; 2803 memcpy(sp->s_name, ".nfsAxxxx4.4", 13); 2804 sp->s_namlen = 12; 2805 sp->s_name[8] = hextoasc[pid & 0xf]; 2806 sp->s_name[7] = hextoasc[(pid >> 4) & 0xf]; 2807 sp->s_name[6] = hextoasc[(pid >> 8) & 0xf]; 2808 sp->s_name[5] = hextoasc[(pid >> 12) & 0xf]; 2809 2810 /* Try lookitups until we get one that isn't there */ 2811 while (nfs_lookitup(dvp, sp->s_name, sp->s_namlen, sp->s_cred, 2812 cnp->cn_proc, (struct nfsnode **)0) == 0) { 2813 sp->s_name[4]++; 2814 if (sp->s_name[4] > 'z') { 2815 error = EINVAL; 2816 goto bad; 2817 } 2818 } 2819 error = nfs_renameit(dvp, cnp, sp); 2820 if (error) 2821 goto bad; 2822 error = nfs_lookitup(dvp, sp->s_name, sp->s_namlen, sp->s_cred, 2823 cnp->cn_proc, &np); 2824 np->n_sillyrename = sp; 2825 return (0); 2826 bad: 2827 vrele(sp->s_dvp); 2828 crfree(sp->s_cred); 2829 free((caddr_t)sp, M_NFSREQ); 2830 return (error); 2831 } 2832 2833 /* 2834 * Look up a file name and optionally either update the file handle or 2835 * allocate an nfsnode, depending on the value of npp. 2836 * npp == NULL --> just do the lookup 2837 * *npp == NULL --> allocate a new nfsnode and make sure attributes are 2838 * handled too 2839 * *npp != NULL --> update the file handle in the vnode 2840 */ 2841 int 2842 nfs_lookitup(dvp, name, len, cred, procp, npp) 2843 struct vnode *dvp; 2844 const char *name; 2845 int len; 2846 struct ucred *cred; 2847 struct proc *procp; 2848 struct nfsnode **npp; 2849 { 2850 u_int32_t *tl; 2851 caddr_t cp; 2852 int32_t t1, t2; 2853 struct vnode *newvp = (struct vnode *)0; 2854 struct nfsnode *np, *dnp = VTONFS(dvp); 2855 caddr_t bpos, dpos, cp2; 2856 int error = 0, fhlen, attrflag; 2857 struct mbuf *mreq, *mrep, *md, *mb; 2858 nfsfh_t *nfhp; 2859 const int v3 = NFS_ISV3(dvp); 2860 2861 nfsstats.rpccnt[NFSPROC_LOOKUP]++; 2862 nfsm_reqhead(dnp, NFSPROC_LOOKUP, 2863 NFSX_FH(v3) + NFSX_UNSIGNED + nfsm_rndup(len)); 2864 nfsm_fhtom(dnp, v3); 2865 nfsm_strtom(name, len, NFS_MAXNAMLEN); 2866 nfsm_request(dnp, NFSPROC_LOOKUP, procp, cred); 2867 if (npp && !error) { 2868 nfsm_getfh(nfhp, fhlen, v3); 2869 if (*npp) { 2870 np = *npp; 2871 if (np->n_fhsize > NFS_SMALLFH && fhlen <= NFS_SMALLFH) { 2872 free((caddr_t)np->n_fhp, M_NFSBIGFH); 2873 np->n_fhp = &np->n_fh; 2874 } else if (np->n_fhsize <= NFS_SMALLFH && fhlen>NFS_SMALLFH) 2875 np->n_fhp =(nfsfh_t *)malloc(fhlen,M_NFSBIGFH,M_WAITOK); 2876 memcpy((caddr_t)np->n_fhp, (caddr_t)nfhp, fhlen); 2877 np->n_fhsize = fhlen; 2878 newvp = NFSTOV(np); 2879 } else if (NFS_CMPFH(dnp, nfhp, fhlen)) { 2880 VREF(dvp); 2881 newvp = dvp; 2882 } else { 2883 error = nfs_nget(dvp->v_mount, nfhp, fhlen, &np); 2884 if (error) { 2885 m_freem(mrep); 2886 return (error); 2887 } 2888 newvp = NFSTOV(np); 2889 } 2890 if (v3) { 2891 nfsm_postop_attr(newvp, attrflag, 0); 2892 if (!attrflag && *npp == NULL) { 2893 m_freem(mrep); 2894 vput(newvp); 2895 return (ENOENT); 2896 } 2897 } else 2898 nfsm_loadattr(newvp, (struct vattr *)0, 0); 2899 } 2900 nfsm_reqdone; 2901 if (npp && *npp == NULL) { 2902 if (error) { 2903 if (newvp) 2904 vput(newvp); 2905 } else 2906 *npp = np; 2907 } 2908 return (error); 2909 } 2910 2911 /* 2912 * Nfs Version 3 commit rpc 2913 */ 2914 int 2915 nfs_commit(vp, offset, cnt, procp) 2916 struct vnode *vp; 2917 off_t offset; 2918 uint32_t cnt; 2919 struct proc *procp; 2920 { 2921 caddr_t cp; 2922 u_int32_t *tl; 2923 int32_t t1, t2; 2924 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 2925 caddr_t bpos, dpos, cp2; 2926 int error = 0, wccflag = NFSV3_WCCRATTR; 2927 struct mbuf *mreq, *mrep, *md, *mb; 2928 struct nfsnode *np; 2929 2930 KASSERT(NFS_ISV3(vp)); 2931 2932 #ifdef NFS_DEBUG_COMMIT 2933 printf("commit %lu - %lu\n", (unsigned long)offset, 2934 (unsigned long)(offset + cnt)); 2935 #endif 2936 2937 simple_lock(&nmp->nm_slock); 2938 if ((nmp->nm_iflag & NFSMNT_HASWRITEVERF) == 0) { 2939 simple_unlock(&nmp->nm_slock); 2940 return (0); 2941 } 2942 simple_unlock(&nmp->nm_slock); 2943 nfsstats.rpccnt[NFSPROC_COMMIT]++; 2944 np = VTONFS(vp); 2945 nfsm_reqhead(np, NFSPROC_COMMIT, NFSX_FH(1)); 2946 nfsm_fhtom(np, 1); 2947 nfsm_build(tl, u_int32_t *, 3 * NFSX_UNSIGNED); 2948 txdr_hyper(offset, tl); 2949 tl += 2; 2950 *tl = txdr_unsigned(cnt); 2951 nfsm_request(np, NFSPROC_COMMIT, procp, VTONFS(vp)->n_wcred); 2952 nfsm_wcc_data(vp, wccflag, 0); 2953 if (!error) { 2954 nfsm_dissect(tl, u_int32_t *, NFSX_V3WRITEVERF); 2955 simple_lock(&nmp->nm_slock); 2956 if ((nmp->nm_iflag & NFSMNT_STALEWRITEVERF) || 2957 memcmp(nmp->nm_writeverf, tl, NFSX_V3WRITEVERF)) { 2958 memcpy(nmp->nm_writeverf, tl, NFSX_V3WRITEVERF); 2959 error = NFSERR_STALEWRITEVERF; 2960 nmp->nm_iflag |= NFSMNT_STALEWRITEVERF; 2961 } 2962 simple_unlock(&nmp->nm_slock); 2963 } 2964 nfsm_reqdone; 2965 return (error); 2966 } 2967 2968 /* 2969 * Kludge City.. 2970 * - make nfs_bmap() essentially a no-op that does no translation 2971 * - do nfs_strategy() by doing I/O with nfs_readrpc/nfs_writerpc 2972 * (Maybe I could use the process's page mapping, but I was concerned that 2973 * Kernel Write might not be enabled and also figured copyout() would do 2974 * a lot more work than memcpy() and also it currently happens in the 2975 * context of the swapper process (2). 2976 */ 2977 int 2978 nfs_bmap(v) 2979 void *v; 2980 { 2981 struct vop_bmap_args /* { 2982 struct vnode *a_vp; 2983 daddr_t a_bn; 2984 struct vnode **a_vpp; 2985 daddr_t *a_bnp; 2986 int *a_runp; 2987 } */ *ap = v; 2988 struct vnode *vp = ap->a_vp; 2989 int bshift = vp->v_mount->mnt_fs_bshift - vp->v_mount->mnt_dev_bshift; 2990 2991 if (ap->a_vpp != NULL) 2992 *ap->a_vpp = vp; 2993 if (ap->a_bnp != NULL) 2994 *ap->a_bnp = ap->a_bn << bshift; 2995 if (ap->a_runp != NULL) 2996 *ap->a_runp = 1024 * 1024; /* XXX */ 2997 return (0); 2998 } 2999 3000 /* 3001 * Strategy routine. 3002 * For async requests when nfsiod(s) are running, queue the request by 3003 * calling nfs_asyncio(), otherwise just all nfs_doio() to do the 3004 * request. 3005 */ 3006 int 3007 nfs_strategy(v) 3008 void *v; 3009 { 3010 struct vop_strategy_args *ap = v; 3011 struct buf *bp = ap->a_bp; 3012 struct proc *p; 3013 int error = 0; 3014 3015 if ((bp->b_flags & (B_PHYS|B_ASYNC)) == (B_PHYS|B_ASYNC)) 3016 panic("nfs physio/async"); 3017 if (bp->b_flags & B_ASYNC) 3018 p = NULL; 3019 else 3020 p = curproc; /* XXX */ 3021 3022 /* 3023 * If the op is asynchronous and an i/o daemon is waiting 3024 * queue the request, wake it up and wait for completion 3025 * otherwise just do it ourselves. 3026 */ 3027 3028 if ((bp->b_flags & B_ASYNC) == 0 || 3029 nfs_asyncio(bp)) 3030 error = nfs_doio(bp, p); 3031 return (error); 3032 } 3033 3034 /* 3035 * fsync vnode op. Just call nfs_flush() with commit == 1. 3036 */ 3037 /* ARGSUSED */ 3038 int 3039 nfs_fsync(v) 3040 void *v; 3041 { 3042 struct vop_fsync_args /* { 3043 struct vnodeop_desc *a_desc; 3044 struct vnode * a_vp; 3045 struct ucred * a_cred; 3046 int a_flags; 3047 off_t offlo; 3048 off_t offhi; 3049 struct proc * a_p; 3050 } */ *ap = v; 3051 3052 return (nfs_flush(ap->a_vp, ap->a_cred, 3053 (ap->a_flags & FSYNC_WAIT) != 0 ? MNT_WAIT : 0, ap->a_p, 1)); 3054 } 3055 3056 /* 3057 * Flush all the data associated with a vnode. 3058 */ 3059 int 3060 nfs_flush(vp, cred, waitfor, p, commit) 3061 struct vnode *vp; 3062 struct ucred *cred; 3063 int waitfor; 3064 struct proc *p; 3065 int commit; 3066 { 3067 struct nfsnode *np = VTONFS(vp); 3068 int error; 3069 int flushflags = PGO_ALLPAGES|PGO_CLEANIT|PGO_SYNCIO; 3070 UVMHIST_FUNC("nfs_flush"); UVMHIST_CALLED(ubchist); 3071 3072 simple_lock(&vp->v_interlock); 3073 error = VOP_PUTPAGES(vp, 0, 0, flushflags); 3074 if (np->n_flag & NWRITEERR) { 3075 error = np->n_error; 3076 np->n_flag &= ~NWRITEERR; 3077 } 3078 UVMHIST_LOG(ubchist, "returning %d", error,0,0,0); 3079 return (error); 3080 } 3081 3082 /* 3083 * Return POSIX pathconf information applicable to nfs. 3084 * 3085 * N.B. The NFS V2 protocol doesn't support this RPC. 3086 */ 3087 /* ARGSUSED */ 3088 int 3089 nfs_pathconf(v) 3090 void *v; 3091 { 3092 struct vop_pathconf_args /* { 3093 struct vnode *a_vp; 3094 int a_name; 3095 register_t *a_retval; 3096 } */ *ap = v; 3097 struct nfsv3_pathconf *pcp; 3098 struct vnode *vp = ap->a_vp; 3099 struct mbuf *mreq, *mrep, *md, *mb; 3100 int32_t t1, t2; 3101 u_int32_t *tl; 3102 caddr_t bpos, dpos, cp, cp2; 3103 int error = 0, attrflag; 3104 #ifndef NFS_V2_ONLY 3105 struct nfsmount *nmp; 3106 unsigned int l; 3107 u_int64_t maxsize; 3108 #endif 3109 const int v3 = NFS_ISV3(vp); 3110 struct nfsnode *np = VTONFS(vp); 3111 3112 switch (ap->a_name) { 3113 /* Names that can be resolved locally. */ 3114 case _PC_PIPE_BUF: 3115 *ap->a_retval = PIPE_BUF; 3116 break; 3117 case _PC_SYNC_IO: 3118 *ap->a_retval = 1; 3119 break; 3120 /* Names that cannot be resolved locally; do an RPC, if possible. */ 3121 case _PC_LINK_MAX: 3122 case _PC_NAME_MAX: 3123 case _PC_CHOWN_RESTRICTED: 3124 case _PC_NO_TRUNC: 3125 if (!v3) { 3126 error = EINVAL; 3127 break; 3128 } 3129 nfsstats.rpccnt[NFSPROC_PATHCONF]++; 3130 nfsm_reqhead(np, NFSPROC_PATHCONF, NFSX_FH(1)); 3131 nfsm_fhtom(np, 1); 3132 nfsm_request(np, NFSPROC_PATHCONF, 3133 curproc, curproc->p_ucred); /* XXX */ 3134 nfsm_postop_attr(vp, attrflag, 0); 3135 if (!error) { 3136 nfsm_dissect(pcp, struct nfsv3_pathconf *, 3137 NFSX_V3PATHCONF); 3138 switch (ap->a_name) { 3139 case _PC_LINK_MAX: 3140 *ap->a_retval = 3141 fxdr_unsigned(register_t, pcp->pc_linkmax); 3142 break; 3143 case _PC_NAME_MAX: 3144 *ap->a_retval = 3145 fxdr_unsigned(register_t, pcp->pc_namemax); 3146 break; 3147 case _PC_CHOWN_RESTRICTED: 3148 *ap->a_retval = 3149 (pcp->pc_chownrestricted == nfs_true); 3150 break; 3151 case _PC_NO_TRUNC: 3152 *ap->a_retval = 3153 (pcp->pc_notrunc == nfs_true); 3154 break; 3155 } 3156 } 3157 nfsm_reqdone; 3158 break; 3159 case _PC_FILESIZEBITS: 3160 #ifndef NFS_V2_ONLY 3161 if (v3) { 3162 nmp = VFSTONFS(vp->v_mount); 3163 if ((nmp->nm_iflag & NFSMNT_GOTFSINFO) == 0) 3164 if ((error = nfs_fsinfo(nmp, vp, 3165 curproc->p_ucred, curproc)) != 0) /* XXX */ 3166 break; 3167 for (l = 0, maxsize = nmp->nm_maxfilesize; 3168 (maxsize >> l) > 0; l++) 3169 ; 3170 *ap->a_retval = l + 1; 3171 } else 3172 #endif 3173 { 3174 *ap->a_retval = 32; /* NFS V2 limitation */ 3175 } 3176 break; 3177 default: 3178 error = EINVAL; 3179 break; 3180 } 3181 3182 return (error); 3183 } 3184 3185 /* 3186 * NFS advisory byte-level locks. 3187 */ 3188 int 3189 nfs_advlock(v) 3190 void *v; 3191 { 3192 struct vop_advlock_args /* { 3193 struct vnode *a_vp; 3194 caddr_t a_id; 3195 int a_op; 3196 struct flock *a_fl; 3197 int a_flags; 3198 } */ *ap = v; 3199 struct nfsnode *np = VTONFS(ap->a_vp); 3200 3201 return lf_advlock(ap, &np->n_lockf, np->n_size); 3202 } 3203 3204 /* 3205 * Print out the contents of an nfsnode. 3206 */ 3207 int 3208 nfs_print(v) 3209 void *v; 3210 { 3211 struct vop_print_args /* { 3212 struct vnode *a_vp; 3213 } */ *ap = v; 3214 struct vnode *vp = ap->a_vp; 3215 struct nfsnode *np = VTONFS(vp); 3216 3217 printf("tag VT_NFS, fileid %ld fsid 0x%lx", 3218 np->n_vattr->va_fileid, np->n_vattr->va_fsid); 3219 if (vp->v_type == VFIFO) 3220 fifo_printinfo(vp); 3221 printf("\n"); 3222 return (0); 3223 } 3224 3225 /* 3226 * NFS file truncation. 3227 */ 3228 int 3229 nfs_truncate(v) 3230 void *v; 3231 { 3232 #if 0 3233 struct vop_truncate_args /* { 3234 struct vnode *a_vp; 3235 off_t a_length; 3236 int a_flags; 3237 struct ucred *a_cred; 3238 struct proc *a_p; 3239 } */ *ap = v; 3240 #endif 3241 3242 /* Use nfs_setattr */ 3243 return (EOPNOTSUPP); 3244 } 3245 3246 /* 3247 * NFS update. 3248 */ 3249 int 3250 nfs_update(v) 3251 void *v; 3252 #if 0 3253 struct vop_update_args /* { 3254 struct vnode *a_vp; 3255 struct timespec *a_ta; 3256 struct timespec *a_tm; 3257 int a_waitfor; 3258 } */ *ap = v; 3259 #endif 3260 { 3261 3262 /* Use nfs_setattr */ 3263 return (EOPNOTSUPP); 3264 } 3265 3266 /* 3267 * Just call bwrite(). 3268 */ 3269 int 3270 nfs_bwrite(v) 3271 void *v; 3272 { 3273 struct vop_bwrite_args /* { 3274 struct vnode *a_bp; 3275 } */ *ap = v; 3276 3277 return (bwrite(ap->a_bp)); 3278 } 3279 3280 /* 3281 * nfs unlock wrapper. 3282 */ 3283 int 3284 nfs_unlock(void *v) 3285 { 3286 struct vop_unlock_args /* { 3287 struct vnode *a_vp; 3288 int a_flags; 3289 } */ *ap = v; 3290 struct vnode *vp = ap->a_vp; 3291 3292 /* 3293 * VOP_UNLOCK can be called by nfs_loadattrcache 3294 * with v_data == 0. 3295 */ 3296 if (VTONFS(vp)) { 3297 nfs_delayedtruncate(vp); 3298 } 3299 3300 return genfs_unlock(v); 3301 } 3302 3303 /* 3304 * nfs special file access vnode op. 3305 * Essentially just get vattr and then imitate iaccess() since the device is 3306 * local to the client. 3307 */ 3308 int 3309 nfsspec_access(v) 3310 void *v; 3311 { 3312 struct vop_access_args /* { 3313 struct vnode *a_vp; 3314 int a_mode; 3315 struct ucred *a_cred; 3316 struct proc *a_p; 3317 } */ *ap = v; 3318 struct vattr va; 3319 struct vnode *vp = ap->a_vp; 3320 int error; 3321 3322 error = VOP_GETATTR(vp, &va, ap->a_cred, ap->a_p); 3323 if (error) 3324 return (error); 3325 3326 /* 3327 * Disallow write attempts on filesystems mounted read-only; 3328 * unless the file is a socket, fifo, or a block or character 3329 * device resident on the filesystem. 3330 */ 3331 if ((ap->a_mode & VWRITE) && (vp->v_mount->mnt_flag & MNT_RDONLY)) { 3332 switch (vp->v_type) { 3333 case VREG: 3334 case VDIR: 3335 case VLNK: 3336 return (EROFS); 3337 default: 3338 break; 3339 } 3340 } 3341 3342 return (vaccess(va.va_type, va.va_mode, 3343 va.va_uid, va.va_gid, ap->a_mode, ap->a_cred)); 3344 } 3345 3346 /* 3347 * Read wrapper for special devices. 3348 */ 3349 int 3350 nfsspec_read(v) 3351 void *v; 3352 { 3353 struct vop_read_args /* { 3354 struct vnode *a_vp; 3355 struct uio *a_uio; 3356 int a_ioflag; 3357 struct ucred *a_cred; 3358 } */ *ap = v; 3359 struct nfsnode *np = VTONFS(ap->a_vp); 3360 3361 /* 3362 * Set access flag. 3363 */ 3364 np->n_flag |= NACC; 3365 np->n_atim.tv_sec = time.tv_sec; 3366 np->n_atim.tv_nsec = time.tv_usec * 1000; 3367 return (VOCALL(spec_vnodeop_p, VOFFSET(vop_read), ap)); 3368 } 3369 3370 /* 3371 * Write wrapper for special devices. 3372 */ 3373 int 3374 nfsspec_write(v) 3375 void *v; 3376 { 3377 struct vop_write_args /* { 3378 struct vnode *a_vp; 3379 struct uio *a_uio; 3380 int a_ioflag; 3381 struct ucred *a_cred; 3382 } */ *ap = v; 3383 struct nfsnode *np = VTONFS(ap->a_vp); 3384 3385 /* 3386 * Set update flag. 3387 */ 3388 np->n_flag |= NUPD; 3389 np->n_mtim.tv_sec = time.tv_sec; 3390 np->n_mtim.tv_nsec = time.tv_usec * 1000; 3391 return (VOCALL(spec_vnodeop_p, VOFFSET(vop_write), ap)); 3392 } 3393 3394 /* 3395 * Close wrapper for special devices. 3396 * 3397 * Update the times on the nfsnode then do device close. 3398 */ 3399 int 3400 nfsspec_close(v) 3401 void *v; 3402 { 3403 struct vop_close_args /* { 3404 struct vnode *a_vp; 3405 int a_fflag; 3406 struct ucred *a_cred; 3407 struct proc *a_p; 3408 } */ *ap = v; 3409 struct vnode *vp = ap->a_vp; 3410 struct nfsnode *np = VTONFS(vp); 3411 struct vattr vattr; 3412 3413 if (np->n_flag & (NACC | NUPD)) { 3414 np->n_flag |= NCHG; 3415 if (vp->v_usecount == 1 && 3416 (vp->v_mount->mnt_flag & MNT_RDONLY) == 0) { 3417 VATTR_NULL(&vattr); 3418 if (np->n_flag & NACC) 3419 vattr.va_atime = np->n_atim; 3420 if (np->n_flag & NUPD) 3421 vattr.va_mtime = np->n_mtim; 3422 (void)VOP_SETATTR(vp, &vattr, ap->a_cred, ap->a_p); 3423 } 3424 } 3425 return (VOCALL(spec_vnodeop_p, VOFFSET(vop_close), ap)); 3426 } 3427 3428 /* 3429 * Read wrapper for fifos. 3430 */ 3431 int 3432 nfsfifo_read(v) 3433 void *v; 3434 { 3435 struct vop_read_args /* { 3436 struct vnode *a_vp; 3437 struct uio *a_uio; 3438 int a_ioflag; 3439 struct ucred *a_cred; 3440 } */ *ap = v; 3441 struct nfsnode *np = VTONFS(ap->a_vp); 3442 3443 /* 3444 * Set access flag. 3445 */ 3446 np->n_flag |= NACC; 3447 np->n_atim.tv_sec = time.tv_sec; 3448 np->n_atim.tv_nsec = time.tv_usec * 1000; 3449 return (VOCALL(fifo_vnodeop_p, VOFFSET(vop_read), ap)); 3450 } 3451 3452 /* 3453 * Write wrapper for fifos. 3454 */ 3455 int 3456 nfsfifo_write(v) 3457 void *v; 3458 { 3459 struct vop_write_args /* { 3460 struct vnode *a_vp; 3461 struct uio *a_uio; 3462 int a_ioflag; 3463 struct ucred *a_cred; 3464 } */ *ap = v; 3465 struct nfsnode *np = VTONFS(ap->a_vp); 3466 3467 /* 3468 * Set update flag. 3469 */ 3470 np->n_flag |= NUPD; 3471 np->n_mtim.tv_sec = time.tv_sec; 3472 np->n_mtim.tv_nsec = time.tv_usec * 1000; 3473 return (VOCALL(fifo_vnodeop_p, VOFFSET(vop_write), ap)); 3474 } 3475 3476 /* 3477 * Close wrapper for fifos. 3478 * 3479 * Update the times on the nfsnode then do fifo close. 3480 */ 3481 int 3482 nfsfifo_close(v) 3483 void *v; 3484 { 3485 struct vop_close_args /* { 3486 struct vnode *a_vp; 3487 int a_fflag; 3488 struct ucred *a_cred; 3489 struct proc *a_p; 3490 } */ *ap = v; 3491 struct vnode *vp = ap->a_vp; 3492 struct nfsnode *np = VTONFS(vp); 3493 struct vattr vattr; 3494 3495 if (np->n_flag & (NACC | NUPD)) { 3496 if (np->n_flag & NACC) { 3497 np->n_atim.tv_sec = time.tv_sec; 3498 np->n_atim.tv_nsec = time.tv_usec * 1000; 3499 } 3500 if (np->n_flag & NUPD) { 3501 np->n_mtim.tv_sec = time.tv_sec; 3502 np->n_mtim.tv_nsec = time.tv_usec * 1000; 3503 } 3504 np->n_flag |= NCHG; 3505 if (vp->v_usecount == 1 && 3506 (vp->v_mount->mnt_flag & MNT_RDONLY) == 0) { 3507 VATTR_NULL(&vattr); 3508 if (np->n_flag & NACC) 3509 vattr.va_atime = np->n_atim; 3510 if (np->n_flag & NUPD) 3511 vattr.va_mtime = np->n_mtim; 3512 (void)VOP_SETATTR(vp, &vattr, ap->a_cred, ap->a_p); 3513 } 3514 } 3515 return (VOCALL(fifo_vnodeop_p, VOFFSET(vop_close), ap)); 3516 } 3517
Indexes created Tue Sep 23 22:09:46 GMT 2025