nfs_vnops.c revision 1.182
1 /* $NetBSD: nfs_vnops.c,v 1.182 2003/10/25 08:48:11 christos 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 1.182 2003/10/25 08:48:11 christos 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; 502 } else { 503 error = VOP_GETATTR(vp, &vattr, ap->a_cred, ap->a_p); 504 if (error) 505 return (error); 506 if (timespeccmp(&np->n_mtime, &vattr.va_mtime, !=)) { 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; 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 /* 619 * if we have delayed truncation, do it now. 620 */ 621 nfs_delayedtruncate(vp); 622 623 /* 624 * First look in the cache. 625 */ 626 if (nfs_getattrcache(vp, ap->a_vap) == 0) 627 return (0); 628 nfsstats.rpccnt[NFSPROC_GETATTR]++; 629 nfsm_reqhead(np, NFSPROC_GETATTR, NFSX_FH(v3)); 630 nfsm_fhtom(np, v3); 631 nfsm_request(np, NFSPROC_GETATTR, ap->a_p, ap->a_cred); 632 if (!error) { 633 nfsm_loadattr(vp, ap->a_vap, 0); 634 if (vp->v_type == VDIR && 635 ap->a_vap->va_blocksize < NFS_DIRFRAGSIZ) 636 ap->a_vap->va_blocksize = NFS_DIRFRAGSIZ; 637 } 638 nfsm_reqdone; 639 return (error); 640 } 641 642 /* 643 * nfs setattr call. 644 */ 645 int 646 nfs_setattr(v) 647 void *v; 648 { 649 struct vop_setattr_args /* { 650 struct vnodeop_desc *a_desc; 651 struct vnode *a_vp; 652 struct vattr *a_vap; 653 struct ucred *a_cred; 654 struct proc *a_p; 655 } */ *ap = v; 656 struct vnode *vp = ap->a_vp; 657 struct nfsnode *np = VTONFS(vp); 658 struct vattr *vap = ap->a_vap; 659 int error = 0; 660 u_quad_t tsize = 0; 661 662 /* 663 * Setting of flags is not supported. 664 */ 665 if (vap->va_flags != VNOVAL) 666 return (EOPNOTSUPP); 667 668 /* 669 * Disallow write attempts if the filesystem is mounted read-only. 670 */ 671 if ((vap->va_uid != (uid_t)VNOVAL || 672 vap->va_gid != (gid_t)VNOVAL || vap->va_atime.tv_sec != VNOVAL || 673 vap->va_mtime.tv_sec != VNOVAL || vap->va_mode != (mode_t)VNOVAL) && 674 (vp->v_mount->mnt_flag & MNT_RDONLY)) 675 return (EROFS); 676 if (vap->va_size != VNOVAL) { 677 switch (vp->v_type) { 678 case VDIR: 679 return (EISDIR); 680 case VCHR: 681 case VBLK: 682 case VSOCK: 683 case VFIFO: 684 if (vap->va_mtime.tv_sec == VNOVAL && 685 vap->va_atime.tv_sec == VNOVAL && 686 vap->va_mode == (mode_t)VNOVAL && 687 vap->va_uid == (uid_t)VNOVAL && 688 vap->va_gid == (gid_t)VNOVAL) 689 return (0); 690 vap->va_size = VNOVAL; 691 break; 692 default: 693 /* 694 * Disallow write attempts if the filesystem is 695 * mounted read-only. 696 */ 697 if (vp->v_mount->mnt_flag & MNT_RDONLY) 698 return (EROFS); 699 uvm_vnp_setsize(vp, vap->va_size); 700 tsize = np->n_size; 701 np->n_size = vap->va_size; 702 if (vap->va_size == 0) 703 error = nfs_vinvalbuf(vp, 0, 704 ap->a_cred, ap->a_p, 1); 705 else 706 error = nfs_vinvalbuf(vp, V_SAVE, 707 ap->a_cred, ap->a_p, 1); 708 if (error) { 709 uvm_vnp_setsize(vp, tsize); 710 return (error); 711 } 712 np->n_vattr->va_size = vap->va_size; 713 } 714 } else if ((vap->va_mtime.tv_sec != VNOVAL || 715 vap->va_atime.tv_sec != VNOVAL) && 716 vp->v_type == VREG && 717 (error = nfs_vinvalbuf(vp, V_SAVE, ap->a_cred, 718 ap->a_p, 1)) == EINTR) 719 return (error); 720 error = nfs_setattrrpc(vp, vap, ap->a_cred, ap->a_p); 721 if (error && vap->va_size != VNOVAL) { 722 np->n_size = np->n_vattr->va_size = tsize; 723 uvm_vnp_setsize(vp, np->n_size); 724 } 725 VN_KNOTE(vp, NOTE_ATTRIB); 726 return (error); 727 } 728 729 /* 730 * Do an nfs setattr rpc. 731 */ 732 int 733 nfs_setattrrpc(vp, vap, cred, procp) 734 struct vnode *vp; 735 struct vattr *vap; 736 struct ucred *cred; 737 struct proc *procp; 738 { 739 struct nfsv2_sattr *sp; 740 caddr_t cp; 741 int32_t t1, t2; 742 caddr_t bpos, dpos, cp2; 743 u_int32_t *tl; 744 int error = 0, wccflag = NFSV3_WCCRATTR; 745 struct mbuf *mreq, *mrep, *md, *mb; 746 const int v3 = NFS_ISV3(vp); 747 struct nfsnode *np = VTONFS(vp); 748 749 nfsstats.rpccnt[NFSPROC_SETATTR]++; 750 nfsm_reqhead(np, NFSPROC_SETATTR, NFSX_FH(v3) + NFSX_SATTR(v3)); 751 nfsm_fhtom(np, v3); 752 if (v3) { 753 nfsm_v3attrbuild(vap, TRUE); 754 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); 755 *tl = nfs_false; 756 } else { 757 nfsm_build(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 758 if (vap->va_mode == (mode_t)VNOVAL) 759 sp->sa_mode = nfs_xdrneg1; 760 else 761 sp->sa_mode = vtonfsv2_mode(vp->v_type, vap->va_mode); 762 if (vap->va_uid == (uid_t)VNOVAL) 763 sp->sa_uid = nfs_xdrneg1; 764 else 765 sp->sa_uid = txdr_unsigned(vap->va_uid); 766 if (vap->va_gid == (gid_t)VNOVAL) 767 sp->sa_gid = nfs_xdrneg1; 768 else 769 sp->sa_gid = txdr_unsigned(vap->va_gid); 770 sp->sa_size = txdr_unsigned(vap->va_size); 771 txdr_nfsv2time(&vap->va_atime, &sp->sa_atime); 772 txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime); 773 } 774 nfsm_request(np, NFSPROC_SETATTR, procp, cred); 775 if (v3) { 776 nfsm_wcc_data(vp, wccflag, 0); 777 } else 778 nfsm_loadattr(vp, (struct vattr *)0, 0); 779 nfsm_reqdone; 780 return (error); 781 } 782 783 /* 784 * nfs lookup call, one step at a time... 785 * First look in cache 786 * If not found, unlock the directory nfsnode and do the rpc 787 * 788 * This code is full of lock/unlock statements and checks, because 789 * we continue after cache_lookup has finished (we need to check 790 * with the attr cache and do an rpc if it has timed out). This means 791 * that the locking effects of cache_lookup have to be taken into 792 * account. 793 */ 794 int 795 nfs_lookup(v) 796 void *v; 797 { 798 struct vop_lookup_args /* { 799 struct vnodeop_desc *a_desc; 800 struct vnode *a_dvp; 801 struct vnode **a_vpp; 802 struct componentname *a_cnp; 803 } */ *ap = v; 804 struct componentname *cnp = ap->a_cnp; 805 struct vnode *dvp = ap->a_dvp; 806 struct vnode **vpp = ap->a_vpp; 807 int flags; 808 struct vnode *newvp; 809 u_int32_t *tl; 810 caddr_t cp; 811 int32_t t1, t2; 812 caddr_t bpos, dpos, cp2; 813 struct mbuf *mreq, *mrep, *md, *mb; 814 long len; 815 nfsfh_t *fhp; 816 struct nfsnode *np; 817 int lockparent, wantparent, error = 0, attrflag, fhsize; 818 const int v3 = NFS_ISV3(dvp); 819 820 cnp->cn_flags &= ~PDIRUNLOCK; 821 flags = cnp->cn_flags; 822 823 *vpp = NULLVP; 824 newvp = NULLVP; 825 if ((flags & ISLASTCN) && (dvp->v_mount->mnt_flag & MNT_RDONLY) && 826 (cnp->cn_nameiop == DELETE || cnp->cn_nameiop == RENAME)) 827 return (EROFS); 828 if (dvp->v_type != VDIR) 829 return (ENOTDIR); 830 831 lockparent = flags & LOCKPARENT; 832 wantparent = flags & (LOCKPARENT|WANTPARENT); 833 np = VTONFS(dvp); 834 835 /* 836 * Before tediously performing a linear scan of the directory, 837 * check the name cache to see if the directory/name pair 838 * we are looking for is known already. 839 * If the directory/name pair is found in the name cache, 840 * we have to ensure the directory has not changed from 841 * the time the cache entry has been created. If it has, 842 * the cache entry has to be ignored. 843 */ 844 if ((error = cache_lookup(dvp, vpp, cnp)) >= 0) { 845 struct vattr vattr; 846 int err2; 847 848 if (error && error != ENOENT) { 849 *vpp = NULLVP; 850 return error; 851 } 852 853 if (cnp->cn_flags & PDIRUNLOCK) { 854 err2 = vn_lock(dvp, LK_EXCLUSIVE | LK_RETRY); 855 if (err2 != 0) { 856 *vpp = NULLVP; 857 return err2; 858 } 859 cnp->cn_flags &= ~PDIRUNLOCK; 860 } 861 862 err2 = VOP_ACCESS(dvp, VEXEC, cnp->cn_cred, cnp->cn_proc); 863 if (err2 != 0) { 864 if (error == 0) { 865 if (*vpp != dvp) 866 vput(*vpp); 867 else 868 vrele(*vpp); 869 } 870 *vpp = NULLVP; 871 return err2; 872 } 873 874 if (error == ENOENT) { 875 if (!VOP_GETATTR(dvp, &vattr, cnp->cn_cred, 876 cnp->cn_proc) && timespeccmp(&vattr.va_mtime, 877 &VTONFS(dvp)->n_nctime, ==)) 878 return ENOENT; 879 cache_purge(dvp); 880 timespecclear(&np->n_nctime); 881 goto dorpc; 882 } 883 884 newvp = *vpp; 885 if (!VOP_GETATTR(newvp, &vattr, cnp->cn_cred, cnp->cn_proc) 886 && vattr.va_ctime.tv_sec == VTONFS(newvp)->n_ctime) 887 { 888 nfsstats.lookupcache_hits++; 889 if (cnp->cn_nameiop != LOOKUP && (flags & ISLASTCN)) 890 cnp->cn_flags |= SAVENAME; 891 if ((!lockparent || !(flags & ISLASTCN)) && 892 newvp != dvp) 893 VOP_UNLOCK(dvp, 0); 894 return (0); 895 } 896 cache_purge(newvp); 897 if (newvp != dvp) 898 vput(newvp); 899 else 900 vrele(newvp); 901 *vpp = NULLVP; 902 } 903 dorpc: 904 error = 0; 905 newvp = NULLVP; 906 nfsstats.lookupcache_misses++; 907 nfsstats.rpccnt[NFSPROC_LOOKUP]++; 908 len = cnp->cn_namelen; 909 nfsm_reqhead(np, NFSPROC_LOOKUP, 910 NFSX_FH(v3) + NFSX_UNSIGNED + nfsm_rndup(len)); 911 nfsm_fhtom(np, v3); 912 nfsm_strtom(cnp->cn_nameptr, len, NFS_MAXNAMLEN); 913 nfsm_request(np, NFSPROC_LOOKUP, cnp->cn_proc, cnp->cn_cred); 914 if (error) { 915 nfsm_postop_attr(dvp, attrflag, 0); 916 m_freem(mrep); 917 goto nfsmout; 918 } 919 nfsm_getfh(fhp, fhsize, v3); 920 921 /* 922 * Handle RENAME case... 923 */ 924 if (cnp->cn_nameiop == RENAME && wantparent && (flags & ISLASTCN)) { 925 if (NFS_CMPFH(np, fhp, fhsize)) { 926 m_freem(mrep); 927 return (EISDIR); 928 } 929 error = nfs_nget(dvp->v_mount, fhp, fhsize, &np); 930 if (error) { 931 m_freem(mrep); 932 return error; 933 } 934 newvp = NFSTOV(np); 935 if (v3) { 936 nfsm_postop_attr(newvp, attrflag, 0); 937 nfsm_postop_attr(dvp, attrflag, 0); 938 } else 939 nfsm_loadattr(newvp, (struct vattr *)0, 0); 940 *vpp = newvp; 941 m_freem(mrep); 942 cnp->cn_flags |= SAVENAME; 943 if (!lockparent) { 944 VOP_UNLOCK(dvp, 0); 945 cnp->cn_flags |= PDIRUNLOCK; 946 } 947 return (0); 948 } 949 950 /* 951 * The postop attr handling is duplicated for each if case, 952 * because it should be done while dvp is locked (unlocking 953 * dvp is different for each case). 954 */ 955 956 if (NFS_CMPFH(np, fhp, fhsize)) { 957 /* 958 * "." lookup 959 */ 960 VREF(dvp); 961 newvp = dvp; 962 if (v3) { 963 nfsm_postop_attr(newvp, attrflag, 0); 964 nfsm_postop_attr(dvp, attrflag, 0); 965 } else 966 nfsm_loadattr(newvp, (struct vattr *)0, 0); 967 } else if (flags & ISDOTDOT) { 968 /* 969 * ".." lookup 970 */ 971 VOP_UNLOCK(dvp, 0); 972 cnp->cn_flags |= PDIRUNLOCK; 973 974 error = nfs_nget(dvp->v_mount, fhp, fhsize, &np); 975 if (error) { 976 if (vn_lock(dvp, LK_EXCLUSIVE | LK_RETRY) == 0) 977 cnp->cn_flags &= ~PDIRUNLOCK; 978 m_freem(mrep); 979 return error; 980 } 981 newvp = NFSTOV(np); 982 983 if (v3) { 984 nfsm_postop_attr(newvp, attrflag, 0); 985 nfsm_postop_attr(dvp, attrflag, 0); 986 } else 987 nfsm_loadattr(newvp, (struct vattr *)0, 0); 988 989 if (lockparent && (flags & ISLASTCN)) { 990 if ((error = vn_lock(dvp, LK_EXCLUSIVE))) { 991 m_freem(mrep); 992 vput(newvp); 993 return error; 994 } 995 cnp->cn_flags &= ~PDIRUNLOCK; 996 } 997 } else { 998 /* 999 * Other lookups. 1000 */ 1001 error = nfs_nget(dvp->v_mount, fhp, fhsize, &np); 1002 if (error) { 1003 m_freem(mrep); 1004 return error; 1005 } 1006 newvp = NFSTOV(np); 1007 if (v3) { 1008 nfsm_postop_attr(newvp, attrflag, 0); 1009 nfsm_postop_attr(dvp, attrflag, 0); 1010 } else 1011 nfsm_loadattr(newvp, (struct vattr *)0, 0); 1012 if (!lockparent || !(flags & ISLASTCN)) { 1013 VOP_UNLOCK(dvp, 0); 1014 cnp->cn_flags |= PDIRUNLOCK; 1015 } 1016 } 1017 if (cnp->cn_nameiop != LOOKUP && (flags & ISLASTCN)) 1018 cnp->cn_flags |= SAVENAME; 1019 if ((cnp->cn_flags & MAKEENTRY) && 1020 (cnp->cn_nameiop != DELETE || !(flags & ISLASTCN))) { 1021 np->n_ctime = np->n_vattr->va_ctime.tv_sec; 1022 cache_enter(dvp, newvp, cnp); 1023 } 1024 *vpp = newvp; 1025 nfsm_reqdone; 1026 if (error) { 1027 /* 1028 * We get here only because of errors returned by 1029 * the RPC. Otherwise we'll have returned above 1030 * (the nfsm_* macros will jump to nfsm_reqdone 1031 * on error). 1032 */ 1033 if (error == ENOENT && (cnp->cn_flags & MAKEENTRY) && 1034 cnp->cn_nameiop != CREATE) { 1035 if (!timespecisset(&VTONFS(dvp)->n_nctime)) 1036 VTONFS(dvp)->n_nctime = 1037 VTONFS(dvp)->n_vattr->va_mtime; 1038 1039 cache_enter(dvp, NULL, cnp); 1040 } 1041 if (newvp != NULLVP) { 1042 vrele(newvp); 1043 if (newvp != dvp) 1044 VOP_UNLOCK(newvp, 0); 1045 } 1046 if ((cnp->cn_nameiop == CREATE || cnp->cn_nameiop == RENAME) && 1047 (flags & ISLASTCN) && error == ENOENT) { 1048 if (dvp->v_mount->mnt_flag & MNT_RDONLY) 1049 error = EROFS; 1050 else 1051 error = EJUSTRETURN; 1052 } 1053 if (cnp->cn_nameiop != LOOKUP && (flags & ISLASTCN)) 1054 cnp->cn_flags |= SAVENAME; 1055 *vpp = NULL; 1056 } 1057 1058 return error; 1059 } 1060 1061 /* 1062 * nfs read call. 1063 * Just call nfs_bioread() to do the work. 1064 */ 1065 int 1066 nfs_read(v) 1067 void *v; 1068 { 1069 struct vop_read_args /* { 1070 struct vnode *a_vp; 1071 struct uio *a_uio; 1072 int a_ioflag; 1073 struct ucred *a_cred; 1074 } */ *ap = v; 1075 struct vnode *vp = ap->a_vp; 1076 1077 if (vp->v_type != VREG) 1078 return (EPERM); 1079 return (nfs_bioread(vp, ap->a_uio, ap->a_ioflag, ap->a_cred, 0)); 1080 } 1081 1082 /* 1083 * nfs readlink call 1084 */ 1085 int 1086 nfs_readlink(v) 1087 void *v; 1088 { 1089 struct vop_readlink_args /* { 1090 struct vnode *a_vp; 1091 struct uio *a_uio; 1092 struct ucred *a_cred; 1093 } */ *ap = v; 1094 struct vnode *vp = ap->a_vp; 1095 1096 if (vp->v_type != VLNK) 1097 return (EPERM); 1098 return (nfs_bioread(vp, ap->a_uio, 0, ap->a_cred, 0)); 1099 } 1100 1101 /* 1102 * Do a readlink rpc. 1103 * Called by nfs_doio() from below the buffer cache. 1104 */ 1105 int 1106 nfs_readlinkrpc(vp, uiop, cred) 1107 struct vnode *vp; 1108 struct uio *uiop; 1109 struct ucred *cred; 1110 { 1111 u_int32_t *tl; 1112 caddr_t cp; 1113 int32_t t1, t2; 1114 caddr_t bpos, dpos, cp2; 1115 int error = 0, attrflag; 1116 uint32_t len; 1117 struct mbuf *mreq, *mrep, *md, *mb; 1118 const int v3 = NFS_ISV3(vp); 1119 struct nfsnode *np = VTONFS(vp); 1120 1121 nfsstats.rpccnt[NFSPROC_READLINK]++; 1122 nfsm_reqhead(np, NFSPROC_READLINK, NFSX_FH(v3)); 1123 nfsm_fhtom(np, v3); 1124 nfsm_request(np, NFSPROC_READLINK, uiop->uio_procp, cred); 1125 if (v3) 1126 nfsm_postop_attr(vp, attrflag, 0); 1127 if (!error) { 1128 if (v3) { 1129 nfsm_dissect(tl, uint32_t *, NFSX_UNSIGNED); 1130 len = fxdr_unsigned(uint32_t, *tl); 1131 if (len > MAXPATHLEN) { 1132 /* 1133 * this pathname is too long for us. 1134 */ 1135 m_freem(mrep); 1136 /* Solaris returns EINVAL. should we follow? */ 1137 error = ENAMETOOLONG; 1138 goto nfsmout; 1139 } 1140 } else { 1141 nfsm_strsiz(len, NFS_MAXPATHLEN); 1142 } 1143 nfsm_mtouio(uiop, len); 1144 } 1145 nfsm_reqdone; 1146 return (error); 1147 } 1148 1149 /* 1150 * nfs read rpc call 1151 * Ditto above 1152 */ 1153 int 1154 nfs_readrpc(vp, uiop) 1155 struct vnode *vp; 1156 struct uio *uiop; 1157 { 1158 u_int32_t *tl; 1159 caddr_t cp; 1160 int32_t t1, t2; 1161 caddr_t bpos, dpos, cp2; 1162 struct mbuf *mreq, *mrep, *md, *mb; 1163 struct nfsmount *nmp; 1164 int error = 0, len, retlen, tsiz, eof, attrflag; 1165 const int v3 = NFS_ISV3(vp); 1166 struct nfsnode *np = VTONFS(vp); 1167 1168 #ifndef nolint 1169 eof = 0; 1170 #endif 1171 nmp = VFSTONFS(vp->v_mount); 1172 tsiz = uiop->uio_resid; 1173 if (uiop->uio_offset + tsiz > nmp->nm_maxfilesize) 1174 return (EFBIG); 1175 while (tsiz > 0) { 1176 nfsstats.rpccnt[NFSPROC_READ]++; 1177 len = (tsiz > nmp->nm_rsize) ? nmp->nm_rsize : tsiz; 1178 nfsm_reqhead(np, NFSPROC_READ, NFSX_FH(v3) + NFSX_UNSIGNED * 3); 1179 nfsm_fhtom(np, v3); 1180 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED * 3); 1181 if (v3) { 1182 txdr_hyper(uiop->uio_offset, tl); 1183 *(tl + 2) = txdr_unsigned(len); 1184 } else { 1185 *tl++ = txdr_unsigned(uiop->uio_offset); 1186 *tl++ = txdr_unsigned(len); 1187 *tl = 0; 1188 } 1189 nfsm_request(np, NFSPROC_READ, uiop->uio_procp, 1190 VTONFS(vp)->n_rcred); 1191 if (v3) { 1192 nfsm_postop_attr(vp, attrflag, NAC_NOTRUNC); 1193 if (error) { 1194 m_freem(mrep); 1195 goto nfsmout; 1196 } 1197 nfsm_dissect(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 1198 eof = fxdr_unsigned(int, *(tl + 1)); 1199 } else 1200 nfsm_loadattr(vp, (struct vattr *)0, NAC_NOTRUNC); 1201 nfsm_strsiz(retlen, nmp->nm_rsize); 1202 nfsm_mtouio(uiop, retlen); 1203 m_freem(mrep); 1204 tsiz -= retlen; 1205 if (v3) { 1206 if (eof || retlen == 0) 1207 tsiz = 0; 1208 } else if (retlen < len) 1209 tsiz = 0; 1210 } 1211 nfsmout: 1212 return (error); 1213 } 1214 1215 struct nfs_writerpc_context { 1216 struct simplelock nwc_slock; 1217 volatile int nwc_mbufcount; 1218 }; 1219 1220 /* 1221 * free mbuf used to refer protected pages while write rpc call. 1222 * called at splvm. 1223 */ 1224 static void 1225 nfs_writerpc_extfree(struct mbuf *m, caddr_t buf, size_t size, void *arg) 1226 { 1227 struct nfs_writerpc_context *ctx = arg; 1228 1229 KASSERT(m != NULL); 1230 KASSERT(ctx != NULL); 1231 pool_cache_put(&mbpool_cache, m); 1232 simple_lock(&ctx->nwc_slock); 1233 if (--ctx->nwc_mbufcount == 0) { 1234 wakeup(ctx); 1235 } 1236 simple_unlock(&ctx->nwc_slock); 1237 } 1238 1239 /* 1240 * nfs write call 1241 */ 1242 int 1243 nfs_writerpc(vp, uiop, iomode, pageprotected, stalewriteverfp) 1244 struct vnode *vp; 1245 struct uio *uiop; 1246 int *iomode; 1247 boolean_t pageprotected; 1248 boolean_t *stalewriteverfp; 1249 { 1250 u_int32_t *tl; 1251 caddr_t cp; 1252 int32_t t1, t2; 1253 caddr_t bpos, dpos, cp2; 1254 struct mbuf *mreq, *mrep, *md, *mb; 1255 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 1256 int error = 0, len, tsiz, wccflag = NFSV3_WCCRATTR, rlen, commit; 1257 const int v3 = NFS_ISV3(vp); 1258 int committed = NFSV3WRITE_FILESYNC; 1259 struct nfsnode *np = VTONFS(vp); 1260 struct nfs_writerpc_context ctx; 1261 int s; 1262 struct lwp *l = NULL; 1263 size_t origresid; 1264 1265 simple_lock_init(&ctx.nwc_slock); 1266 ctx.nwc_mbufcount = 1; 1267 1268 if (vp->v_mount->mnt_flag & MNT_RDONLY) { 1269 panic("writerpc readonly vp %p", vp); 1270 } 1271 1272 #ifdef DIAGNOSTIC 1273 if (uiop->uio_iovcnt != 1) 1274 panic("nfs: writerpc iovcnt > 1"); 1275 #endif 1276 tsiz = uiop->uio_resid; 1277 if (uiop->uio_offset + tsiz > nmp->nm_maxfilesize) 1278 return (EFBIG); 1279 if (pageprotected) { 1280 l = curlwp; 1281 PHOLD(l); 1282 } 1283 retry: 1284 origresid = uiop->uio_resid; 1285 KASSERT(origresid == uiop->uio_iov->iov_len); 1286 while (tsiz > 0) { 1287 uint32_t datalen; /* data bytes need to be allocated in mbuf */ 1288 uint32_t backup; 1289 boolean_t stalewriteverf = FALSE; 1290 1291 nfsstats.rpccnt[NFSPROC_WRITE]++; 1292 len = min(tsiz, nmp->nm_wsize); 1293 datalen = pageprotected ? 0 : nfsm_rndup(len); 1294 nfsm_reqhead(np, NFSPROC_WRITE, 1295 NFSX_FH(v3) + 5 * NFSX_UNSIGNED + datalen); 1296 nfsm_fhtom(np, v3); 1297 if (v3) { 1298 nfsm_build(tl, u_int32_t *, 5 * NFSX_UNSIGNED); 1299 txdr_hyper(uiop->uio_offset, tl); 1300 tl += 2; 1301 *tl++ = txdr_unsigned(len); 1302 *tl++ = txdr_unsigned(*iomode); 1303 *tl = txdr_unsigned(len); 1304 } else { 1305 u_int32_t x; 1306 1307 nfsm_build(tl, u_int32_t *, 4 * NFSX_UNSIGNED); 1308 /* Set both "begin" and "current" to non-garbage. */ 1309 x = txdr_unsigned((u_int32_t)uiop->uio_offset); 1310 *tl++ = x; /* "begin offset" */ 1311 *tl++ = x; /* "current offset" */ 1312 x = txdr_unsigned(len); 1313 *tl++ = x; /* total to this offset */ 1314 *tl = x; /* size of this write */ 1315 1316 } 1317 if (pageprotected) { 1318 /* 1319 * since we know pages can't be modified during i/o, 1320 * no need to copy them for us. 1321 */ 1322 struct mbuf *m; 1323 struct iovec *iovp = uiop->uio_iov; 1324 1325 m = m_get(M_WAIT, MT_DATA); 1326 MCLAIM(m, &nfs_mowner); 1327 MEXTADD(m, iovp->iov_base, len, M_MBUF, 1328 nfs_writerpc_extfree, &ctx); 1329 m->m_flags |= M_EXT_ROMAP; 1330 m->m_len = len; 1331 mb->m_next = m; 1332 /* 1333 * no need to maintain mb and bpos here 1334 * because no one care them later. 1335 */ 1336 #if 0 1337 mb = m; 1338 bpos = mtod(caddr_t, mb) + mb->m_len; 1339 #endif 1340 iovp->iov_base = (char *)iovp->iov_base + len; 1341 iovp->iov_len -= len; 1342 uiop->uio_offset += len; 1343 uiop->uio_resid -= len; 1344 s = splvm(); 1345 simple_lock(&ctx.nwc_slock); 1346 ctx.nwc_mbufcount++; 1347 simple_unlock(&ctx.nwc_slock); 1348 splx(s); 1349 } else { 1350 nfsm_uiotom(uiop, len); 1351 } 1352 nfsm_request(np, NFSPROC_WRITE, uiop->uio_procp, 1353 VTONFS(vp)->n_wcred); 1354 if (v3) { 1355 wccflag = NFSV3_WCCCHK; 1356 nfsm_wcc_data(vp, wccflag, NAC_NOTRUNC); 1357 if (!error) { 1358 nfsm_dissect(tl, u_int32_t *, 2 * NFSX_UNSIGNED 1359 + NFSX_V3WRITEVERF); 1360 rlen = fxdr_unsigned(int, *tl++); 1361 if (rlen == 0) { 1362 error = NFSERR_IO; 1363 m_freem(mrep); 1364 break; 1365 } else if (rlen < len) { 1366 backup = len - rlen; 1367 uiop->uio_iov->iov_base = 1368 (caddr_t)uiop->uio_iov->iov_base - 1369 backup; 1370 uiop->uio_iov->iov_len += backup; 1371 uiop->uio_offset -= backup; 1372 uiop->uio_resid += backup; 1373 len = rlen; 1374 } 1375 commit = fxdr_unsigned(int, *tl++); 1376 1377 /* 1378 * Return the lowest committment level 1379 * obtained by any of the RPCs. 1380 */ 1381 if (committed == NFSV3WRITE_FILESYNC) 1382 committed = commit; 1383 else if (committed == NFSV3WRITE_DATASYNC && 1384 commit == NFSV3WRITE_UNSTABLE) 1385 committed = commit; 1386 simple_lock(&nmp->nm_slock); 1387 if ((nmp->nm_iflag & NFSMNT_HASWRITEVERF) == 0){ 1388 memcpy(nmp->nm_writeverf, tl, 1389 NFSX_V3WRITEVERF); 1390 nmp->nm_iflag |= NFSMNT_HASWRITEVERF; 1391 } else if ((nmp->nm_iflag & 1392 NFSMNT_STALEWRITEVERF) || 1393 memcmp(tl, nmp->nm_writeverf, 1394 NFSX_V3WRITEVERF)) { 1395 memcpy(nmp->nm_writeverf, tl, 1396 NFSX_V3WRITEVERF); 1397 /* 1398 * note NFSMNT_STALEWRITEVERF 1399 * if we're the first thread to 1400 * notice it. 1401 */ 1402 if ((nmp->nm_iflag & 1403 NFSMNT_STALEWRITEVERF) == 0) { 1404 stalewriteverf = TRUE; 1405 nmp->nm_iflag |= 1406 NFSMNT_STALEWRITEVERF; 1407 } 1408 } 1409 simple_unlock(&nmp->nm_slock); 1410 } 1411 } else 1412 nfsm_loadattr(vp, (struct vattr *)0, NAC_NOTRUNC); 1413 if (wccflag) 1414 VTONFS(vp)->n_mtime = VTONFS(vp)->n_vattr->va_mtime; 1415 m_freem(mrep); 1416 if (error) 1417 break; 1418 tsiz -= len; 1419 if (stalewriteverf) { 1420 *stalewriteverfp = TRUE; 1421 stalewriteverf = FALSE; 1422 if (committed == NFSV3WRITE_UNSTABLE && 1423 len != origresid) { 1424 /* 1425 * if our write requests weren't atomic but 1426 * unstable, datas in previous iterations 1427 * might have already been lost now. 1428 * then, we should resend them to nfsd. 1429 */ 1430 backup = origresid - tsiz; 1431 uiop->uio_iov->iov_base = 1432 (caddr_t)uiop->uio_iov->iov_base - backup; 1433 uiop->uio_iov->iov_len += backup; 1434 uiop->uio_offset -= backup; 1435 uiop->uio_resid += backup; 1436 tsiz = origresid; 1437 goto retry; 1438 } 1439 } 1440 } 1441 if (pageprotected) { 1442 /* 1443 * wait until mbufs go away. 1444 * retransmitted mbufs can survive longer than rpc requests 1445 * themselves. 1446 */ 1447 s = splvm(); 1448 simple_lock(&ctx.nwc_slock); 1449 ctx.nwc_mbufcount--; 1450 while (ctx.nwc_mbufcount > 0) { 1451 ltsleep(&ctx, PRIBIO, "nfsmblk", 0, &ctx.nwc_slock); 1452 } 1453 simple_unlock(&ctx.nwc_slock); 1454 splx(s); 1455 PRELE(l); 1456 } 1457 nfsmout: 1458 *iomode = committed; 1459 if (error) 1460 uiop->uio_resid = tsiz; 1461 return (error); 1462 } 1463 1464 /* 1465 * nfs mknod rpc 1466 * For NFS v2 this is a kludge. Use a create rpc but with the IFMT bits of the 1467 * mode set to specify the file type and the size field for rdev. 1468 */ 1469 int 1470 nfs_mknodrpc(dvp, vpp, cnp, vap) 1471 struct vnode *dvp; 1472 struct vnode **vpp; 1473 struct componentname *cnp; 1474 struct vattr *vap; 1475 { 1476 struct nfsv2_sattr *sp; 1477 u_int32_t *tl; 1478 caddr_t cp; 1479 int32_t t1, t2; 1480 struct vnode *newvp = (struct vnode *)0; 1481 struct nfsnode *dnp, *np; 1482 char *cp2; 1483 caddr_t bpos, dpos; 1484 int error = 0, wccflag = NFSV3_WCCRATTR, gotvp = 0; 1485 struct mbuf *mreq, *mrep, *md, *mb; 1486 u_int32_t rdev; 1487 const int v3 = NFS_ISV3(dvp); 1488 1489 if (vap->va_type == VCHR || vap->va_type == VBLK) 1490 rdev = txdr_unsigned(vap->va_rdev); 1491 else if (vap->va_type == VFIFO || vap->va_type == VSOCK) 1492 rdev = nfs_xdrneg1; 1493 else { 1494 VOP_ABORTOP(dvp, cnp); 1495 vput(dvp); 1496 return (EOPNOTSUPP); 1497 } 1498 nfsstats.rpccnt[NFSPROC_MKNOD]++; 1499 dnp = VTONFS(dvp); 1500 nfsm_reqhead(dnp, NFSPROC_MKNOD, NFSX_FH(v3) + 4 * NFSX_UNSIGNED + 1501 + nfsm_rndup(cnp->cn_namelen) + NFSX_SATTR(v3)); 1502 nfsm_fhtom(dnp, v3); 1503 nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN); 1504 if (v3) { 1505 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); 1506 *tl++ = vtonfsv3_type(vap->va_type); 1507 nfsm_v3attrbuild(vap, FALSE); 1508 if (vap->va_type == VCHR || vap->va_type == VBLK) { 1509 nfsm_build(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 1510 *tl++ = txdr_unsigned(major(vap->va_rdev)); 1511 *tl = txdr_unsigned(minor(vap->va_rdev)); 1512 } 1513 } else { 1514 nfsm_build(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 1515 sp->sa_mode = vtonfsv2_mode(vap->va_type, vap->va_mode); 1516 sp->sa_uid = nfs_xdrneg1; 1517 sp->sa_gid = nfs_xdrneg1; 1518 sp->sa_size = rdev; 1519 txdr_nfsv2time(&vap->va_atime, &sp->sa_atime); 1520 txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime); 1521 } 1522 nfsm_request(dnp, NFSPROC_MKNOD, cnp->cn_proc, cnp->cn_cred); 1523 if (!error) { 1524 nfsm_mtofh(dvp, newvp, v3, gotvp); 1525 if (!gotvp) { 1526 error = nfs_lookitup(dvp, cnp->cn_nameptr, 1527 cnp->cn_namelen, cnp->cn_cred, cnp->cn_proc, &np); 1528 if (!error) 1529 newvp = NFSTOV(np); 1530 } 1531 } 1532 if (v3) 1533 nfsm_wcc_data(dvp, wccflag, 0); 1534 nfsm_reqdone; 1535 if (error) { 1536 if (newvp) 1537 vput(newvp); 1538 } else { 1539 if (cnp->cn_flags & MAKEENTRY) 1540 cache_enter(dvp, newvp, cnp); 1541 *vpp = newvp; 1542 } 1543 PNBUF_PUT(cnp->cn_pnbuf); 1544 VTONFS(dvp)->n_flag |= NMODIFIED; 1545 if (!wccflag) 1546 VTONFS(dvp)->n_attrstamp = 0; 1547 vput(dvp); 1548 return (error); 1549 } 1550 1551 /* 1552 * nfs mknod vop 1553 * just call nfs_mknodrpc() to do the work. 1554 */ 1555 /* ARGSUSED */ 1556 int 1557 nfs_mknod(v) 1558 void *v; 1559 { 1560 struct vop_mknod_args /* { 1561 struct vnode *a_dvp; 1562 struct vnode **a_vpp; 1563 struct componentname *a_cnp; 1564 struct vattr *a_vap; 1565 } */ *ap = v; 1566 int error; 1567 1568 error = nfs_mknodrpc(ap->a_dvp, ap->a_vpp, ap->a_cnp, ap->a_vap); 1569 VN_KNOTE(ap->a_dvp, NOTE_WRITE); 1570 return (error); 1571 } 1572 1573 static u_long create_verf; 1574 /* 1575 * nfs file create call 1576 */ 1577 int 1578 nfs_create(v) 1579 void *v; 1580 { 1581 struct vop_create_args /* { 1582 struct vnode *a_dvp; 1583 struct vnode **a_vpp; 1584 struct componentname *a_cnp; 1585 struct vattr *a_vap; 1586 } */ *ap = v; 1587 struct vnode *dvp = ap->a_dvp; 1588 struct vattr *vap = ap->a_vap; 1589 struct componentname *cnp = ap->a_cnp; 1590 struct nfsv2_sattr *sp; 1591 u_int32_t *tl; 1592 caddr_t cp; 1593 int32_t t1, t2; 1594 struct nfsnode *dnp, *np = (struct nfsnode *)0; 1595 struct vnode *newvp = (struct vnode *)0; 1596 caddr_t bpos, dpos, cp2; 1597 int error, wccflag = NFSV3_WCCRATTR, gotvp = 0, fmode = 0; 1598 struct mbuf *mreq, *mrep, *md, *mb; 1599 const int v3 = NFS_ISV3(dvp); 1600 1601 /* 1602 * Oops, not for me.. 1603 */ 1604 if (vap->va_type == VSOCK) 1605 return (nfs_mknodrpc(dvp, ap->a_vpp, cnp, vap)); 1606 1607 #ifdef VA_EXCLUSIVE 1608 if (vap->va_vaflags & VA_EXCLUSIVE) 1609 fmode |= O_EXCL; 1610 #endif 1611 again: 1612 error = 0; 1613 nfsstats.rpccnt[NFSPROC_CREATE]++; 1614 dnp = VTONFS(dvp); 1615 nfsm_reqhead(dnp, NFSPROC_CREATE, NFSX_FH(v3) + 2 * NFSX_UNSIGNED + 1616 nfsm_rndup(cnp->cn_namelen) + NFSX_SATTR(v3)); 1617 nfsm_fhtom(dnp, v3); 1618 nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN); 1619 if (v3) { 1620 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); 1621 if (fmode & O_EXCL) { 1622 *tl = txdr_unsigned(NFSV3CREATE_EXCLUSIVE); 1623 nfsm_build(tl, u_int32_t *, NFSX_V3CREATEVERF); 1624 #ifdef INET 1625 if (TAILQ_FIRST(&in_ifaddr)) 1626 *tl++ = TAILQ_FIRST(&in_ifaddr)->ia_addr.sin_addr.s_addr; 1627 else 1628 *tl++ = create_verf; 1629 #else 1630 *tl++ = create_verf; 1631 #endif 1632 *tl = ++create_verf; 1633 } else { 1634 *tl = txdr_unsigned(NFSV3CREATE_UNCHECKED); 1635 nfsm_v3attrbuild(vap, FALSE); 1636 } 1637 } else { 1638 nfsm_build(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 1639 sp->sa_mode = vtonfsv2_mode(vap->va_type, vap->va_mode); 1640 sp->sa_uid = nfs_xdrneg1; 1641 sp->sa_gid = nfs_xdrneg1; 1642 sp->sa_size = 0; 1643 txdr_nfsv2time(&vap->va_atime, &sp->sa_atime); 1644 txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime); 1645 } 1646 nfsm_request(dnp, NFSPROC_CREATE, cnp->cn_proc, cnp->cn_cred); 1647 if (!error) { 1648 nfsm_mtofh(dvp, newvp, v3, gotvp); 1649 if (!gotvp) { 1650 error = nfs_lookitup(dvp, cnp->cn_nameptr, 1651 cnp->cn_namelen, cnp->cn_cred, cnp->cn_proc, &np); 1652 if (!error) 1653 newvp = NFSTOV(np); 1654 } 1655 } 1656 if (v3) 1657 nfsm_wcc_data(dvp, wccflag, 0); 1658 nfsm_reqdone; 1659 if (error) { 1660 if (v3 && (fmode & O_EXCL) && error == NFSERR_NOTSUPP) { 1661 fmode &= ~O_EXCL; 1662 goto again; 1663 } 1664 if (newvp) 1665 vput(newvp); 1666 } else if (v3 && (fmode & O_EXCL)) 1667 error = nfs_setattrrpc(newvp, vap, cnp->cn_cred, cnp->cn_proc); 1668 if (!error) { 1669 if (cnp->cn_flags & MAKEENTRY) 1670 cache_enter(dvp, newvp, cnp); 1671 *ap->a_vpp = newvp; 1672 } 1673 PNBUF_PUT(cnp->cn_pnbuf); 1674 VTONFS(dvp)->n_flag |= NMODIFIED; 1675 if (!wccflag) 1676 VTONFS(dvp)->n_attrstamp = 0; 1677 VN_KNOTE(ap->a_dvp, NOTE_WRITE); 1678 vput(dvp); 1679 return (error); 1680 } 1681 1682 /* 1683 * nfs file remove call 1684 * To try and make nfs semantics closer to ufs semantics, a file that has 1685 * other processes using the vnode is renamed instead of removed and then 1686 * removed later on the last close. 1687 * - If v_usecount > 1 1688 * If a rename is not already in the works 1689 * call nfs_sillyrename() to set it up 1690 * else 1691 * do the remove rpc 1692 */ 1693 int 1694 nfs_remove(v) 1695 void *v; 1696 { 1697 struct vop_remove_args /* { 1698 struct vnodeop_desc *a_desc; 1699 struct vnode * a_dvp; 1700 struct vnode * a_vp; 1701 struct componentname * a_cnp; 1702 } */ *ap = v; 1703 struct vnode *vp = ap->a_vp; 1704 struct vnode *dvp = ap->a_dvp; 1705 struct componentname *cnp = ap->a_cnp; 1706 struct nfsnode *np = VTONFS(vp); 1707 int error = 0; 1708 struct vattr vattr; 1709 1710 #ifndef DIAGNOSTIC 1711 if ((cnp->cn_flags & HASBUF) == 0) 1712 panic("nfs_remove: no name"); 1713 if (vp->v_usecount < 1) 1714 panic("nfs_remove: bad v_usecount"); 1715 #endif 1716 if (vp->v_type == VDIR) 1717 error = EPERM; 1718 else if (vp->v_usecount == 1 || (np->n_sillyrename && 1719 VOP_GETATTR(vp, &vattr, cnp->cn_cred, cnp->cn_proc) == 0 && 1720 vattr.va_nlink > 1)) { 1721 /* 1722 * Purge the name cache so that the chance of a lookup for 1723 * the name succeeding while the remove is in progress is 1724 * minimized. Without node locking it can still happen, such 1725 * that an I/O op returns ESTALE, but since you get this if 1726 * another host removes the file.. 1727 */ 1728 cache_purge(vp); 1729 /* 1730 * throw away biocache buffers, mainly to avoid 1731 * unnecessary delayed writes later. 1732 */ 1733 error = nfs_vinvalbuf(vp, 0, cnp->cn_cred, cnp->cn_proc, 1); 1734 /* Do the rpc */ 1735 if (error != EINTR) 1736 error = nfs_removerpc(dvp, cnp->cn_nameptr, 1737 cnp->cn_namelen, cnp->cn_cred, cnp->cn_proc); 1738 /* 1739 * Kludge City: If the first reply to the remove rpc is lost.. 1740 * the reply to the retransmitted request will be ENOENT 1741 * since the file was in fact removed 1742 * Therefore, we cheat and return success. 1743 */ 1744 if (error == ENOENT) 1745 error = 0; 1746 } else if (!np->n_sillyrename) 1747 error = nfs_sillyrename(dvp, vp, cnp); 1748 PNBUF_PUT(cnp->cn_pnbuf); 1749 if (!error && nfs_getattrcache(vp, &vattr) == 0 && 1750 vattr.va_nlink == 1) { 1751 np->n_flag |= NREMOVED; 1752 } 1753 np->n_attrstamp = 0; 1754 VN_KNOTE(vp, NOTE_DELETE); 1755 VN_KNOTE(dvp, NOTE_WRITE); 1756 if (dvp == vp) 1757 vrele(vp); 1758 else 1759 vput(vp); 1760 vput(dvp); 1761 return (error); 1762 } 1763 1764 /* 1765 * nfs file remove rpc called from nfs_inactive 1766 */ 1767 int 1768 nfs_removeit(sp) 1769 struct sillyrename *sp; 1770 { 1771 1772 return (nfs_removerpc(sp->s_dvp, sp->s_name, sp->s_namlen, sp->s_cred, 1773 (struct proc *)0)); 1774 } 1775 1776 /* 1777 * Nfs remove rpc, called from nfs_remove() and nfs_removeit(). 1778 */ 1779 int 1780 nfs_removerpc(dvp, name, namelen, cred, proc) 1781 struct vnode *dvp; 1782 const char *name; 1783 int namelen; 1784 struct ucred *cred; 1785 struct proc *proc; 1786 { 1787 u_int32_t *tl; 1788 caddr_t cp; 1789 int32_t t1, t2; 1790 caddr_t bpos, dpos, cp2; 1791 int error = 0, wccflag = NFSV3_WCCRATTR; 1792 struct mbuf *mreq, *mrep, *md, *mb; 1793 const int v3 = NFS_ISV3(dvp); 1794 struct nfsnode *dnp = VTONFS(dvp); 1795 1796 nfsstats.rpccnt[NFSPROC_REMOVE]++; 1797 nfsm_reqhead(dnp, NFSPROC_REMOVE, 1798 NFSX_FH(v3) + NFSX_UNSIGNED + nfsm_rndup(namelen)); 1799 nfsm_fhtom(dnp, v3); 1800 nfsm_strtom(name, namelen, NFS_MAXNAMLEN); 1801 nfsm_request(dnp, NFSPROC_REMOVE, proc, cred); 1802 if (v3) 1803 nfsm_wcc_data(dvp, wccflag, 0); 1804 nfsm_reqdone; 1805 VTONFS(dvp)->n_flag |= NMODIFIED; 1806 if (!wccflag) 1807 VTONFS(dvp)->n_attrstamp = 0; 1808 return (error); 1809 } 1810 1811 /* 1812 * nfs file rename call 1813 */ 1814 int 1815 nfs_rename(v) 1816 void *v; 1817 { 1818 struct vop_rename_args /* { 1819 struct vnode *a_fdvp; 1820 struct vnode *a_fvp; 1821 struct componentname *a_fcnp; 1822 struct vnode *a_tdvp; 1823 struct vnode *a_tvp; 1824 struct componentname *a_tcnp; 1825 } */ *ap = v; 1826 struct vnode *fvp = ap->a_fvp; 1827 struct vnode *tvp = ap->a_tvp; 1828 struct vnode *fdvp = ap->a_fdvp; 1829 struct vnode *tdvp = ap->a_tdvp; 1830 struct componentname *tcnp = ap->a_tcnp; 1831 struct componentname *fcnp = ap->a_fcnp; 1832 int error; 1833 1834 #ifndef DIAGNOSTIC 1835 if ((tcnp->cn_flags & HASBUF) == 0 || 1836 (fcnp->cn_flags & HASBUF) == 0) 1837 panic("nfs_rename: no name"); 1838 #endif 1839 /* Check for cross-device rename */ 1840 if ((fvp->v_mount != tdvp->v_mount) || 1841 (tvp && (fvp->v_mount != tvp->v_mount))) { 1842 error = EXDEV; 1843 goto out; 1844 } 1845 1846 /* 1847 * If the tvp exists and is in use, sillyrename it before doing the 1848 * rename of the new file over it. 1849 */ 1850 if (tvp && tvp->v_usecount > 1 && !VTONFS(tvp)->n_sillyrename && 1851 tvp->v_type != VDIR && !nfs_sillyrename(tdvp, tvp, tcnp)) { 1852 VN_KNOTE(tvp, NOTE_DELETE); 1853 vput(tvp); 1854 tvp = NULL; 1855 } 1856 1857 error = nfs_renamerpc(fdvp, fcnp->cn_nameptr, fcnp->cn_namelen, 1858 tdvp, tcnp->cn_nameptr, tcnp->cn_namelen, tcnp->cn_cred, 1859 tcnp->cn_proc); 1860 1861 VN_KNOTE(fdvp, NOTE_WRITE); 1862 VN_KNOTE(tdvp, NOTE_WRITE); 1863 if (fvp->v_type == VDIR) { 1864 if (tvp != NULL && tvp->v_type == VDIR) 1865 cache_purge(tdvp); 1866 cache_purge(fdvp); 1867 } 1868 out: 1869 if (tdvp == tvp) 1870 vrele(tdvp); 1871 else 1872 vput(tdvp); 1873 if (tvp) 1874 vput(tvp); 1875 vrele(fdvp); 1876 vrele(fvp); 1877 /* 1878 * Kludge: Map ENOENT => 0 assuming that it is a reply to a retry. 1879 */ 1880 if (error == ENOENT) 1881 error = 0; 1882 return (error); 1883 } 1884 1885 /* 1886 * nfs file rename rpc called from nfs_remove() above 1887 */ 1888 int 1889 nfs_renameit(sdvp, scnp, sp) 1890 struct vnode *sdvp; 1891 struct componentname *scnp; 1892 struct sillyrename *sp; 1893 { 1894 return (nfs_renamerpc(sdvp, scnp->cn_nameptr, scnp->cn_namelen, 1895 sdvp, sp->s_name, sp->s_namlen, scnp->cn_cred, scnp->cn_proc)); 1896 } 1897 1898 /* 1899 * Do an nfs rename rpc. Called from nfs_rename() and nfs_renameit(). 1900 */ 1901 int 1902 nfs_renamerpc(fdvp, fnameptr, fnamelen, tdvp, tnameptr, tnamelen, cred, proc) 1903 struct vnode *fdvp; 1904 const char *fnameptr; 1905 int fnamelen; 1906 struct vnode *tdvp; 1907 const char *tnameptr; 1908 int tnamelen; 1909 struct ucred *cred; 1910 struct proc *proc; 1911 { 1912 u_int32_t *tl; 1913 caddr_t cp; 1914 int32_t t1, t2; 1915 caddr_t bpos, dpos, cp2; 1916 int error = 0, fwccflag = NFSV3_WCCRATTR, twccflag = NFSV3_WCCRATTR; 1917 struct mbuf *mreq, *mrep, *md, *mb; 1918 const int v3 = NFS_ISV3(fdvp); 1919 struct nfsnode *fdnp = VTONFS(fdvp); 1920 1921 nfsstats.rpccnt[NFSPROC_RENAME]++; 1922 nfsm_reqhead(fdnp, NFSPROC_RENAME, 1923 (NFSX_FH(v3) + NFSX_UNSIGNED)*2 + nfsm_rndup(fnamelen) + 1924 nfsm_rndup(tnamelen)); 1925 nfsm_fhtom(fdnp, v3); 1926 nfsm_strtom(fnameptr, fnamelen, NFS_MAXNAMLEN); 1927 nfsm_fhtom(VTONFS(tdvp), v3); 1928 nfsm_strtom(tnameptr, tnamelen, NFS_MAXNAMLEN); 1929 nfsm_request(fdnp, NFSPROC_RENAME, proc, cred); 1930 if (v3) { 1931 nfsm_wcc_data(fdvp, fwccflag, 0); 1932 nfsm_wcc_data(tdvp, twccflag, 0); 1933 } 1934 nfsm_reqdone; 1935 VTONFS(fdvp)->n_flag |= NMODIFIED; 1936 VTONFS(tdvp)->n_flag |= NMODIFIED; 1937 if (!fwccflag) 1938 VTONFS(fdvp)->n_attrstamp = 0; 1939 if (!twccflag) 1940 VTONFS(tdvp)->n_attrstamp = 0; 1941 return (error); 1942 } 1943 1944 /* 1945 * nfs hard link create call 1946 */ 1947 int 1948 nfs_link(v) 1949 void *v; 1950 { 1951 struct vop_link_args /* { 1952 struct vnode *a_dvp; 1953 struct vnode *a_vp; 1954 struct componentname *a_cnp; 1955 } */ *ap = v; 1956 struct vnode *vp = ap->a_vp; 1957 struct vnode *dvp = ap->a_dvp; 1958 struct componentname *cnp = ap->a_cnp; 1959 u_int32_t *tl; 1960 caddr_t cp; 1961 int32_t t1, t2; 1962 caddr_t bpos, dpos, cp2; 1963 int error = 0, wccflag = NFSV3_WCCRATTR, attrflag = 0; 1964 struct mbuf *mreq, *mrep, *md, *mb; 1965 /* XXX Should be const and initialised? */ 1966 int v3; 1967 struct nfsnode *np; 1968 1969 if (dvp->v_mount != vp->v_mount) { 1970 VOP_ABORTOP(dvp, cnp); 1971 vput(dvp); 1972 return (EXDEV); 1973 } 1974 if (dvp != vp) { 1975 error = vn_lock(vp, LK_EXCLUSIVE); 1976 if (error != 0) { 1977 VOP_ABORTOP(dvp, cnp); 1978 vput(dvp); 1979 return error; 1980 } 1981 } 1982 1983 /* 1984 * Push all writes to the server, so that the attribute cache 1985 * doesn't get "out of sync" with the server. 1986 * XXX There should be a better way! 1987 */ 1988 VOP_FSYNC(vp, cnp->cn_cred, FSYNC_WAIT, 0, 0, cnp->cn_proc); 1989 1990 v3 = NFS_ISV3(vp); 1991 nfsstats.rpccnt[NFSPROC_LINK]++; 1992 np = VTONFS(vp); 1993 nfsm_reqhead(np, NFSPROC_LINK, 1994 NFSX_FH(v3)*2 + NFSX_UNSIGNED + nfsm_rndup(cnp->cn_namelen)); 1995 nfsm_fhtom(np, v3); 1996 nfsm_fhtom(VTONFS(dvp), v3); 1997 nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN); 1998 nfsm_request(np, NFSPROC_LINK, cnp->cn_proc, cnp->cn_cred); 1999 if (v3) { 2000 nfsm_postop_attr(vp, attrflag, 0); 2001 nfsm_wcc_data(dvp, wccflag, 0); 2002 } 2003 nfsm_reqdone; 2004 PNBUF_PUT(cnp->cn_pnbuf); 2005 VTONFS(dvp)->n_flag |= NMODIFIED; 2006 if (!attrflag) 2007 VTONFS(vp)->n_attrstamp = 0; 2008 if (!wccflag) 2009 VTONFS(dvp)->n_attrstamp = 0; 2010 if (dvp != vp) 2011 VOP_UNLOCK(vp, 0); 2012 VN_KNOTE(vp, NOTE_LINK); 2013 VN_KNOTE(dvp, NOTE_WRITE); 2014 vput(dvp); 2015 /* 2016 * Kludge: Map EEXIST => 0 assuming that it is a reply to a retry. 2017 */ 2018 if (error == EEXIST) 2019 error = 0; 2020 return (error); 2021 } 2022 2023 /* 2024 * nfs symbolic link create call 2025 */ 2026 int 2027 nfs_symlink(v) 2028 void *v; 2029 { 2030 struct vop_symlink_args /* { 2031 struct vnode *a_dvp; 2032 struct vnode **a_vpp; 2033 struct componentname *a_cnp; 2034 struct vattr *a_vap; 2035 char *a_target; 2036 } */ *ap = v; 2037 struct vnode *dvp = ap->a_dvp; 2038 struct vattr *vap = ap->a_vap; 2039 struct componentname *cnp = ap->a_cnp; 2040 struct nfsv2_sattr *sp; 2041 u_int32_t *tl; 2042 caddr_t cp; 2043 int32_t t1, t2; 2044 caddr_t bpos, dpos, cp2; 2045 int slen, error = 0, wccflag = NFSV3_WCCRATTR, gotvp; 2046 struct mbuf *mreq, *mrep, *md, *mb; 2047 struct vnode *newvp = (struct vnode *)0; 2048 const int v3 = NFS_ISV3(dvp); 2049 struct nfsnode *dnp = VTONFS(dvp); 2050 2051 *ap->a_vpp = NULL; 2052 nfsstats.rpccnt[NFSPROC_SYMLINK]++; 2053 slen = strlen(ap->a_target); 2054 nfsm_reqhead(dnp, NFSPROC_SYMLINK, NFSX_FH(v3) + 2*NFSX_UNSIGNED + 2055 nfsm_rndup(cnp->cn_namelen) + nfsm_rndup(slen) + NFSX_SATTR(v3)); 2056 nfsm_fhtom(dnp, v3); 2057 nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN); 2058 if (v3) 2059 nfsm_v3attrbuild(vap, FALSE); 2060 nfsm_strtom(ap->a_target, slen, NFS_MAXPATHLEN); 2061 if (!v3) { 2062 nfsm_build(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 2063 sp->sa_mode = vtonfsv2_mode(VLNK, vap->va_mode); 2064 sp->sa_uid = nfs_xdrneg1; 2065 sp->sa_gid = nfs_xdrneg1; 2066 sp->sa_size = nfs_xdrneg1; 2067 txdr_nfsv2time(&vap->va_atime, &sp->sa_atime); 2068 txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime); 2069 } 2070 nfsm_request(dnp, NFSPROC_SYMLINK, cnp->cn_proc, cnp->cn_cred); 2071 if (v3) { 2072 if (!error) 2073 nfsm_mtofh(dvp, newvp, v3, gotvp); 2074 nfsm_wcc_data(dvp, wccflag, 0); 2075 } 2076 nfsm_reqdone; 2077 /* 2078 * Kludge: Map EEXIST => 0 assuming that it is a reply to a retry. 2079 */ 2080 if (error == EEXIST) 2081 error = 0; 2082 if (error == 0 && newvp == NULL) { 2083 struct nfsnode *np = NULL; 2084 2085 error = nfs_lookitup(dvp, cnp->cn_nameptr, cnp->cn_namelen, 2086 cnp->cn_cred, cnp->cn_proc, &np); 2087 if (error == 0) 2088 newvp = NFSTOV(np); 2089 } 2090 if (error) { 2091 if (newvp != NULL) 2092 vput(newvp); 2093 } else { 2094 *ap->a_vpp = newvp; 2095 } 2096 PNBUF_PUT(cnp->cn_pnbuf); 2097 VTONFS(dvp)->n_flag |= NMODIFIED; 2098 if (!wccflag) 2099 VTONFS(dvp)->n_attrstamp = 0; 2100 VN_KNOTE(dvp, NOTE_WRITE); 2101 vput(dvp); 2102 return (error); 2103 } 2104 2105 /* 2106 * nfs make dir call 2107 */ 2108 int 2109 nfs_mkdir(v) 2110 void *v; 2111 { 2112 struct vop_mkdir_args /* { 2113 struct vnode *a_dvp; 2114 struct vnode **a_vpp; 2115 struct componentname *a_cnp; 2116 struct vattr *a_vap; 2117 } */ *ap = v; 2118 struct vnode *dvp = ap->a_dvp; 2119 struct vattr *vap = ap->a_vap; 2120 struct componentname *cnp = ap->a_cnp; 2121 struct nfsv2_sattr *sp; 2122 u_int32_t *tl; 2123 caddr_t cp; 2124 int32_t t1, t2; 2125 int len; 2126 struct nfsnode *dnp = VTONFS(dvp), *np = (struct nfsnode *)0; 2127 struct vnode *newvp = (struct vnode *)0; 2128 caddr_t bpos, dpos, cp2; 2129 int error = 0, wccflag = NFSV3_WCCRATTR; 2130 int gotvp = 0; 2131 struct mbuf *mreq, *mrep, *md, *mb; 2132 const int v3 = NFS_ISV3(dvp); 2133 2134 len = cnp->cn_namelen; 2135 nfsstats.rpccnt[NFSPROC_MKDIR]++; 2136 nfsm_reqhead(dnp, NFSPROC_MKDIR, 2137 NFSX_FH(v3) + NFSX_UNSIGNED + nfsm_rndup(len) + NFSX_SATTR(v3)); 2138 nfsm_fhtom(dnp, v3); 2139 nfsm_strtom(cnp->cn_nameptr, len, NFS_MAXNAMLEN); 2140 if (v3) { 2141 nfsm_v3attrbuild(vap, FALSE); 2142 } else { 2143 nfsm_build(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 2144 sp->sa_mode = vtonfsv2_mode(VDIR, vap->va_mode); 2145 sp->sa_uid = nfs_xdrneg1; 2146 sp->sa_gid = nfs_xdrneg1; 2147 sp->sa_size = nfs_xdrneg1; 2148 txdr_nfsv2time(&vap->va_atime, &sp->sa_atime); 2149 txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime); 2150 } 2151 nfsm_request(dnp, NFSPROC_MKDIR, cnp->cn_proc, cnp->cn_cred); 2152 if (!error) 2153 nfsm_mtofh(dvp, newvp, v3, gotvp); 2154 if (v3) 2155 nfsm_wcc_data(dvp, wccflag, 0); 2156 nfsm_reqdone; 2157 VTONFS(dvp)->n_flag |= NMODIFIED; 2158 if (!wccflag) 2159 VTONFS(dvp)->n_attrstamp = 0; 2160 /* 2161 * Kludge: Map EEXIST => 0 assuming that you have a reply to a retry 2162 * if we can succeed in looking up the directory. 2163 */ 2164 if (error == EEXIST || (!error && !gotvp)) { 2165 if (newvp) { 2166 vput(newvp); 2167 newvp = (struct vnode *)0; 2168 } 2169 error = nfs_lookitup(dvp, cnp->cn_nameptr, len, cnp->cn_cred, 2170 cnp->cn_proc, &np); 2171 if (!error) { 2172 newvp = NFSTOV(np); 2173 if (newvp->v_type != VDIR) 2174 error = EEXIST; 2175 } 2176 } 2177 if (error) { 2178 if (newvp) 2179 vput(newvp); 2180 } else { 2181 VN_KNOTE(dvp, NOTE_WRITE | NOTE_LINK); 2182 if (cnp->cn_flags & MAKEENTRY) 2183 cache_enter(dvp, newvp, cnp); 2184 *ap->a_vpp = newvp; 2185 } 2186 PNBUF_PUT(cnp->cn_pnbuf); 2187 vput(dvp); 2188 return (error); 2189 } 2190 2191 /* 2192 * nfs remove directory call 2193 */ 2194 int 2195 nfs_rmdir(v) 2196 void *v; 2197 { 2198 struct vop_rmdir_args /* { 2199 struct vnode *a_dvp; 2200 struct vnode *a_vp; 2201 struct componentname *a_cnp; 2202 } */ *ap = v; 2203 struct vnode *vp = ap->a_vp; 2204 struct vnode *dvp = ap->a_dvp; 2205 struct componentname *cnp = ap->a_cnp; 2206 u_int32_t *tl; 2207 caddr_t cp; 2208 int32_t t1, t2; 2209 caddr_t bpos, dpos, cp2; 2210 int error = 0, wccflag = NFSV3_WCCRATTR; 2211 struct mbuf *mreq, *mrep, *md, *mb; 2212 const int v3 = NFS_ISV3(dvp); 2213 struct nfsnode *dnp; 2214 2215 if (dvp == vp) { 2216 vrele(dvp); 2217 vput(dvp); 2218 PNBUF_PUT(cnp->cn_pnbuf); 2219 return (EINVAL); 2220 } 2221 nfsstats.rpccnt[NFSPROC_RMDIR]++; 2222 dnp = VTONFS(dvp); 2223 nfsm_reqhead(dnp, NFSPROC_RMDIR, 2224 NFSX_FH(v3) + NFSX_UNSIGNED + nfsm_rndup(cnp->cn_namelen)); 2225 nfsm_fhtom(dnp, v3); 2226 nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN); 2227 nfsm_request(dnp, NFSPROC_RMDIR, cnp->cn_proc, cnp->cn_cred); 2228 if (v3) 2229 nfsm_wcc_data(dvp, wccflag, 0); 2230 nfsm_reqdone; 2231 PNBUF_PUT(cnp->cn_pnbuf); 2232 VTONFS(dvp)->n_flag |= NMODIFIED; 2233 if (!wccflag) 2234 VTONFS(dvp)->n_attrstamp = 0; 2235 VN_KNOTE(dvp, NOTE_WRITE | NOTE_LINK); 2236 VN_KNOTE(vp, NOTE_DELETE); 2237 cache_purge(dvp); 2238 cache_purge(vp); 2239 vput(vp); 2240 vput(dvp); 2241 /* 2242 * Kludge: Map ENOENT => 0 assuming that you have a reply to a retry. 2243 */ 2244 if (error == ENOENT) 2245 error = 0; 2246 return (error); 2247 } 2248 2249 /* 2250 * nfs readdir call 2251 */ 2252 int 2253 nfs_readdir(v) 2254 void *v; 2255 { 2256 struct vop_readdir_args /* { 2257 struct vnode *a_vp; 2258 struct uio *a_uio; 2259 struct ucred *a_cred; 2260 int *a_eofflag; 2261 off_t **a_cookies; 2262 int *a_ncookies; 2263 } */ *ap = v; 2264 struct vnode *vp = ap->a_vp; 2265 struct uio *uio = ap->a_uio; 2266 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 2267 char *base = uio->uio_iov->iov_base; 2268 int tresid, error; 2269 size_t count, lost; 2270 struct dirent *dp; 2271 off_t *cookies = NULL; 2272 int ncookies = 0, nc; 2273 2274 if (vp->v_type != VDIR) 2275 return (EPERM); 2276 2277 lost = uio->uio_resid & (NFS_DIRFRAGSIZ - 1); 2278 count = uio->uio_resid - lost; 2279 if (count <= 0) 2280 return (EINVAL); 2281 2282 /* 2283 * Call nfs_bioread() to do the real work. 2284 */ 2285 tresid = uio->uio_resid = count; 2286 error = nfs_bioread(vp, uio, 0, ap->a_cred, 2287 ap->a_cookies ? NFSBIO_CACHECOOKIES : 0); 2288 2289 if (!error && ap->a_cookies) { 2290 ncookies = count / 16; 2291 cookies = malloc(sizeof (off_t) * ncookies, M_TEMP, M_WAITOK); 2292 *ap->a_cookies = cookies; 2293 } 2294 2295 if (!error && uio->uio_resid == tresid) { 2296 uio->uio_resid += lost; 2297 nfsstats.direofcache_misses++; 2298 if (ap->a_cookies) 2299 *ap->a_ncookies = 0; 2300 *ap->a_eofflag = 1; 2301 return (0); 2302 } 2303 2304 if (!error && ap->a_cookies) { 2305 /* 2306 * Only the NFS server and emulations use cookies, and they 2307 * load the directory block into system space, so we can 2308 * just look at it directly. 2309 */ 2310 if (uio->uio_segflg != UIO_SYSSPACE || uio->uio_iovcnt != 1) 2311 panic("nfs_readdir: lost in space"); 2312 for (nc = 0; ncookies-- && 2313 base < (char *)uio->uio_iov->iov_base; nc++){ 2314 dp = (struct dirent *) base; 2315 if (dp->d_reclen == 0) 2316 break; 2317 if (nmp->nm_flag & NFSMNT_XLATECOOKIE) 2318 *(cookies++) = (off_t)NFS_GETCOOKIE32(dp); 2319 else 2320 *(cookies++) = NFS_GETCOOKIE(dp); 2321 base += dp->d_reclen; 2322 } 2323 uio->uio_resid += 2324 ((caddr_t)uio->uio_iov->iov_base - base); 2325 uio->uio_iov->iov_len += 2326 ((caddr_t)uio->uio_iov->iov_base - base); 2327 uio->uio_iov->iov_base = base; 2328 *ap->a_ncookies = nc; 2329 } 2330 2331 uio->uio_resid += lost; 2332 *ap->a_eofflag = 0; 2333 return (error); 2334 } 2335 2336 /* 2337 * Readdir rpc call. 2338 * Called from below the buffer cache by nfs_doio(). 2339 */ 2340 int 2341 nfs_readdirrpc(vp, uiop, cred) 2342 struct vnode *vp; 2343 struct uio *uiop; 2344 struct ucred *cred; 2345 { 2346 int len, left; 2347 struct dirent *dp = NULL; 2348 u_int32_t *tl; 2349 caddr_t cp; 2350 int32_t t1, t2; 2351 caddr_t bpos, dpos, cp2; 2352 struct mbuf *mreq, *mrep, *md, *mb; 2353 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 2354 struct nfsnode *dnp = VTONFS(vp); 2355 u_quad_t fileno; 2356 int error = 0, tlen, more_dirs = 1, blksiz = 0, bigenough = 1; 2357 int attrflag, nrpcs = 0, reclen; 2358 const int v3 = NFS_ISV3(vp); 2359 2360 #ifdef DIAGNOSTIC 2361 /* 2362 * Should be called from buffer cache, so only amount of 2363 * NFS_DIRBLKSIZ will be requested. 2364 */ 2365 if (uiop->uio_iovcnt != 1 || (uiop->uio_resid & (NFS_DIRBLKSIZ - 1))) 2366 panic("nfs readdirrpc bad uio"); 2367 #endif 2368 2369 /* 2370 * Loop around doing readdir rpc's of size nm_readdirsize 2371 * truncated to a multiple of NFS_DIRFRAGSIZ. 2372 * The stopping criteria is EOF or buffer full. 2373 */ 2374 while (more_dirs && bigenough) { 2375 /* 2376 * Heuristic: don't bother to do another RPC to further 2377 * fill up this block if there is not much room left. (< 50% 2378 * of the readdir RPC size). This wastes some buffer space 2379 * but can save up to 50% in RPC calls. 2380 */ 2381 if (nrpcs > 0 && uiop->uio_resid < (nmp->nm_readdirsize / 2)) { 2382 bigenough = 0; 2383 break; 2384 } 2385 nfsstats.rpccnt[NFSPROC_READDIR]++; 2386 nfsm_reqhead(dnp, NFSPROC_READDIR, NFSX_FH(v3) + 2387 NFSX_READDIR(v3)); 2388 nfsm_fhtom(dnp, v3); 2389 if (v3) { 2390 nfsm_build(tl, u_int32_t *, 5 * NFSX_UNSIGNED); 2391 if (nmp->nm_iflag & NFSMNT_SWAPCOOKIE) { 2392 txdr_swapcookie3(uiop->uio_offset, tl); 2393 } else { 2394 txdr_cookie3(uiop->uio_offset, tl); 2395 } 2396 tl += 2; 2397 *tl++ = dnp->n_cookieverf.nfsuquad[0]; 2398 *tl++ = dnp->n_cookieverf.nfsuquad[1]; 2399 } else { 2400 nfsm_build(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 2401 *tl++ = txdr_unsigned(uiop->uio_offset); 2402 } 2403 *tl = txdr_unsigned(nmp->nm_readdirsize); 2404 nfsm_request(dnp, NFSPROC_READDIR, uiop->uio_procp, cred); 2405 nrpcs++; 2406 if (v3) { 2407 nfsm_postop_attr(vp, attrflag, 0); 2408 if (!error) { 2409 nfsm_dissect(tl, u_int32_t *, 2410 2 * NFSX_UNSIGNED); 2411 dnp->n_cookieverf.nfsuquad[0] = *tl++; 2412 dnp->n_cookieverf.nfsuquad[1] = *tl; 2413 } else { 2414 m_freem(mrep); 2415 goto nfsmout; 2416 } 2417 } 2418 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 2419 more_dirs = fxdr_unsigned(int, *tl); 2420 2421 /* loop thru the dir entries, doctoring them to 4bsd form */ 2422 while (more_dirs && bigenough) { 2423 if (v3) { 2424 nfsm_dissect(tl, u_int32_t *, 2425 3 * NFSX_UNSIGNED); 2426 fileno = fxdr_hyper(tl); 2427 len = fxdr_unsigned(int, *(tl + 2)); 2428 } else { 2429 nfsm_dissect(tl, u_int32_t *, 2430 2 * NFSX_UNSIGNED); 2431 fileno = fxdr_unsigned(u_quad_t, *tl++); 2432 len = fxdr_unsigned(int, *tl); 2433 } 2434 if (len <= 0 || len > NFS_MAXNAMLEN) { 2435 error = EBADRPC; 2436 m_freem(mrep); 2437 goto nfsmout; 2438 } 2439 tlen = nfsm_rndup(len); 2440 if (tlen == len) 2441 tlen += 4; /* To ensure null termination */ 2442 tlen += sizeof (off_t) + sizeof (int); 2443 reclen = ALIGN(tlen + DIRHDSIZ); 2444 tlen = reclen - DIRHDSIZ; 2445 left = NFS_DIRFRAGSIZ - blksiz; 2446 if (reclen > left) { 2447 dp->d_reclen += left; 2448 uiop->uio_iov->iov_base = 2449 (caddr_t)uiop->uio_iov->iov_base + left; 2450 uiop->uio_iov->iov_len -= left; 2451 uiop->uio_resid -= left; 2452 blksiz = 0; 2453 NFS_STASHCOOKIE(dp, uiop->uio_offset); 2454 } 2455 if (reclen > uiop->uio_resid) 2456 bigenough = 0; 2457 if (bigenough) { 2458 dp = (struct dirent *)uiop->uio_iov->iov_base; 2459 dp->d_fileno = (int)fileno; 2460 dp->d_namlen = len; 2461 dp->d_reclen = reclen; 2462 dp->d_type = DT_UNKNOWN; 2463 blksiz += dp->d_reclen; 2464 if (blksiz == NFS_DIRFRAGSIZ) 2465 blksiz = 0; 2466 uiop->uio_resid -= DIRHDSIZ; 2467 uiop->uio_iov->iov_base = 2468 (caddr_t)uiop->uio_iov->iov_base + DIRHDSIZ; 2469 uiop->uio_iov->iov_len -= DIRHDSIZ; 2470 nfsm_mtouio(uiop, len); 2471 cp = uiop->uio_iov->iov_base; 2472 tlen -= len; 2473 *cp = '\0'; /* null terminate */ 2474 uiop->uio_iov->iov_base = 2475 (caddr_t)uiop->uio_iov->iov_base + tlen; 2476 uiop->uio_iov->iov_len -= tlen; 2477 uiop->uio_resid -= tlen; 2478 } else 2479 nfsm_adv(nfsm_rndup(len)); 2480 if (v3) { 2481 nfsm_dissect(tl, u_int32_t *, 2482 3 * NFSX_UNSIGNED); 2483 } else { 2484 nfsm_dissect(tl, u_int32_t *, 2485 2 * NFSX_UNSIGNED); 2486 } 2487 if (bigenough) { 2488 if (v3) { 2489 if (nmp->nm_iflag & NFSMNT_SWAPCOOKIE) 2490 uiop->uio_offset = 2491 fxdr_swapcookie3(tl); 2492 else 2493 uiop->uio_offset = 2494 fxdr_cookie3(tl); 2495 } 2496 else { 2497 uiop->uio_offset = 2498 fxdr_unsigned(off_t, *tl); 2499 } 2500 NFS_STASHCOOKIE(dp, uiop->uio_offset); 2501 } 2502 if (v3) 2503 tl += 2; 2504 else 2505 tl++; 2506 more_dirs = fxdr_unsigned(int, *tl); 2507 } 2508 /* 2509 * If at end of rpc data, get the eof boolean 2510 */ 2511 if (!more_dirs) { 2512 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 2513 more_dirs = (fxdr_unsigned(int, *tl) == 0); 2514 } 2515 m_freem(mrep); 2516 } 2517 /* 2518 * Fill last record, iff any, out to a multiple of NFS_DIRFRAGSIZ 2519 * by increasing d_reclen for the last record. 2520 */ 2521 if (blksiz > 0) { 2522 left = NFS_DIRFRAGSIZ - blksiz; 2523 dp->d_reclen += left; 2524 NFS_STASHCOOKIE(dp, uiop->uio_offset); 2525 uiop->uio_iov->iov_base = (caddr_t)uiop->uio_iov->iov_base + 2526 left; 2527 uiop->uio_iov->iov_len -= left; 2528 uiop->uio_resid -= left; 2529 } 2530 2531 /* 2532 * We are now either at the end of the directory or have filled the 2533 * block. 2534 */ 2535 if (bigenough) 2536 dnp->n_direofoffset = uiop->uio_offset; 2537 nfsmout: 2538 return (error); 2539 } 2540 2541 /* 2542 * NFS V3 readdir plus RPC. Used in place of nfs_readdirrpc(). 2543 */ 2544 int 2545 nfs_readdirplusrpc(vp, uiop, cred) 2546 struct vnode *vp; 2547 struct uio *uiop; 2548 struct ucred *cred; 2549 { 2550 int len, left; 2551 struct dirent *dp = NULL; 2552 u_int32_t *tl; 2553 caddr_t cp; 2554 int32_t t1, t2; 2555 struct vnode *newvp; 2556 caddr_t bpos, dpos, cp2; 2557 struct mbuf *mreq, *mrep, *md, *mb; 2558 struct nameidata nami, *ndp = &nami; 2559 struct componentname *cnp = &ndp->ni_cnd; 2560 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 2561 struct nfsnode *dnp = VTONFS(vp), *np; 2562 nfsfh_t *fhp; 2563 u_quad_t fileno; 2564 int error = 0, tlen, more_dirs = 1, blksiz = 0, doit, bigenough = 1, i; 2565 int attrflag, fhsize, nrpcs = 0, reclen; 2566 struct nfs_fattr fattr, *fp; 2567 2568 #ifdef DIAGNOSTIC 2569 if (uiop->uio_iovcnt != 1 || (uiop->uio_resid & (NFS_DIRBLKSIZ - 1))) 2570 panic("nfs readdirplusrpc bad uio"); 2571 #endif 2572 ndp->ni_dvp = vp; 2573 newvp = NULLVP; 2574 2575 /* 2576 * Loop around doing readdir rpc's of size nm_readdirsize 2577 * truncated to a multiple of NFS_DIRFRAGSIZ. 2578 * The stopping criteria is EOF or buffer full. 2579 */ 2580 while (more_dirs && bigenough) { 2581 if (nrpcs > 0 && uiop->uio_resid < (nmp->nm_readdirsize / 2)) { 2582 bigenough = 0; 2583 break; 2584 } 2585 nfsstats.rpccnt[NFSPROC_READDIRPLUS]++; 2586 nfsm_reqhead(dnp, NFSPROC_READDIRPLUS, 2587 NFSX_FH(1) + 6 * NFSX_UNSIGNED); 2588 nfsm_fhtom(dnp, 1); 2589 nfsm_build(tl, u_int32_t *, 6 * NFSX_UNSIGNED); 2590 if (nmp->nm_iflag & NFSMNT_SWAPCOOKIE) { 2591 txdr_swapcookie3(uiop->uio_offset, tl); 2592 } else { 2593 txdr_cookie3(uiop->uio_offset, tl); 2594 } 2595 tl += 2; 2596 *tl++ = dnp->n_cookieverf.nfsuquad[0]; 2597 *tl++ = dnp->n_cookieverf.nfsuquad[1]; 2598 *tl++ = txdr_unsigned(nmp->nm_readdirsize); 2599 *tl = txdr_unsigned(nmp->nm_rsize); 2600 nfsm_request(dnp, NFSPROC_READDIRPLUS, uiop->uio_procp, cred); 2601 nfsm_postop_attr(vp, attrflag, 0); 2602 if (error) { 2603 m_freem(mrep); 2604 goto nfsmout; 2605 } 2606 nrpcs++; 2607 nfsm_dissect(tl, u_int32_t *, 3 * NFSX_UNSIGNED); 2608 dnp->n_cookieverf.nfsuquad[0] = *tl++; 2609 dnp->n_cookieverf.nfsuquad[1] = *tl++; 2610 more_dirs = fxdr_unsigned(int, *tl); 2611 2612 /* loop thru the dir entries, doctoring them to 4bsd form */ 2613 while (more_dirs && bigenough) { 2614 nfsm_dissect(tl, u_int32_t *, 3 * NFSX_UNSIGNED); 2615 fileno = fxdr_hyper(tl); 2616 len = fxdr_unsigned(int, *(tl + 2)); 2617 if (len <= 0 || len > NFS_MAXNAMLEN) { 2618 error = EBADRPC; 2619 m_freem(mrep); 2620 goto nfsmout; 2621 } 2622 tlen = nfsm_rndup(len); 2623 if (tlen == len) 2624 tlen += 4; /* To ensure null termination*/ 2625 tlen += sizeof (off_t) + sizeof (int); 2626 reclen = ALIGN(tlen + DIRHDSIZ); 2627 tlen = reclen - DIRHDSIZ; 2628 left = NFS_DIRFRAGSIZ - blksiz; 2629 if (reclen > left) { 2630 /* 2631 * DIRFRAGSIZ is aligned, no need to align 2632 * again here. 2633 */ 2634 dp->d_reclen += left; 2635 uiop->uio_iov->iov_base = 2636 (caddr_t)uiop->uio_iov->iov_base + left; 2637 uiop->uio_iov->iov_len -= left; 2638 uiop->uio_resid -= left; 2639 NFS_STASHCOOKIE(dp, uiop->uio_offset); 2640 blksiz = 0; 2641 } 2642 if (reclen > uiop->uio_resid) 2643 bigenough = 0; 2644 if (bigenough) { 2645 dp = (struct dirent *)uiop->uio_iov->iov_base; 2646 dp->d_fileno = (int)fileno; 2647 dp->d_namlen = len; 2648 dp->d_reclen = reclen; 2649 dp->d_type = DT_UNKNOWN; 2650 blksiz += dp->d_reclen; 2651 if (blksiz == NFS_DIRFRAGSIZ) 2652 blksiz = 0; 2653 uiop->uio_resid -= DIRHDSIZ; 2654 uiop->uio_iov->iov_base = 2655 (caddr_t)uiop->uio_iov->iov_base + 2656 DIRHDSIZ; 2657 uiop->uio_iov->iov_len -= DIRHDSIZ; 2658 cnp->cn_nameptr = uiop->uio_iov->iov_base; 2659 cnp->cn_namelen = len; 2660 nfsm_mtouio(uiop, len); 2661 cp = uiop->uio_iov->iov_base; 2662 tlen -= len; 2663 *cp = '\0'; 2664 uiop->uio_iov->iov_base = 2665 (caddr_t)uiop->uio_iov->iov_base + tlen; 2666 uiop->uio_iov->iov_len -= tlen; 2667 uiop->uio_resid -= tlen; 2668 } else 2669 nfsm_adv(nfsm_rndup(len)); 2670 nfsm_dissect(tl, u_int32_t *, 3 * NFSX_UNSIGNED); 2671 if (bigenough) { 2672 if (nmp->nm_iflag & NFSMNT_SWAPCOOKIE) 2673 uiop->uio_offset = 2674 fxdr_swapcookie3(tl); 2675 else 2676 uiop->uio_offset = 2677 fxdr_cookie3(tl); 2678 NFS_STASHCOOKIE(dp, uiop->uio_offset); 2679 } 2680 tl += 2; 2681 2682 /* 2683 * Since the attributes are before the file handle 2684 * (sigh), we must skip over the attributes and then 2685 * come back and get them. 2686 */ 2687 attrflag = fxdr_unsigned(int, *tl); 2688 if (attrflag) { 2689 nfsm_dissect(fp, struct nfs_fattr *, NFSX_V3FATTR); 2690 memcpy(&fattr, fp, NFSX_V3FATTR); 2691 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 2692 doit = fxdr_unsigned(int, *tl); 2693 if (doit) { 2694 nfsm_getfh(fhp, fhsize, 1); 2695 if (NFS_CMPFH(dnp, fhp, fhsize)) { 2696 VREF(vp); 2697 newvp = vp; 2698 np = dnp; 2699 } else { 2700 error = nfs_nget(vp->v_mount, fhp, 2701 fhsize, &np); 2702 if (!error) 2703 newvp = NFSTOV(np); 2704 } 2705 if (!error) { 2706 const char *cp; 2707 2708 nfs_loadattrcache(&newvp, &fattr, 0, 0); 2709 dp->d_type = 2710 IFTODT(VTTOIF(np->n_vattr->va_type)); 2711 ndp->ni_vp = newvp; 2712 cp = cnp->cn_nameptr + cnp->cn_namelen; 2713 cnp->cn_hash = 2714 namei_hash(cnp->cn_nameptr, &cp); 2715 if (cnp->cn_namelen <= NCHNAMLEN) 2716 cache_enter(ndp->ni_dvp, ndp->ni_vp, 2717 cnp); 2718 } 2719 } 2720 } else { 2721 /* Just skip over the file handle */ 2722 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 2723 i = fxdr_unsigned(int, *tl); 2724 nfsm_adv(nfsm_rndup(i)); 2725 } 2726 if (newvp != NULLVP) { 2727 if (newvp == vp) 2728 vrele(newvp); 2729 else 2730 vput(newvp); 2731 newvp = NULLVP; 2732 } 2733 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 2734 more_dirs = fxdr_unsigned(int, *tl); 2735 } 2736 /* 2737 * If at end of rpc data, get the eof boolean 2738 */ 2739 if (!more_dirs) { 2740 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 2741 more_dirs = (fxdr_unsigned(int, *tl) == 0); 2742 } 2743 m_freem(mrep); 2744 } 2745 /* 2746 * Fill last record, iff any, out to a multiple of NFS_DIRFRAGSIZ 2747 * by increasing d_reclen for the last record. 2748 */ 2749 if (blksiz > 0) { 2750 left = NFS_DIRFRAGSIZ - blksiz; 2751 dp->d_reclen += left; 2752 NFS_STASHCOOKIE(dp, uiop->uio_offset); 2753 uiop->uio_iov->iov_base = (caddr_t)uiop->uio_iov->iov_base + 2754 left; 2755 uiop->uio_iov->iov_len -= left; 2756 uiop->uio_resid -= left; 2757 } 2758 2759 /* 2760 * We are now either at the end of the directory or have filled the 2761 * block. 2762 */ 2763 if (bigenough) 2764 dnp->n_direofoffset = uiop->uio_offset; 2765 nfsmout: 2766 if (newvp != NULLVP) { 2767 if(newvp == vp) 2768 vrele(newvp); 2769 else 2770 vput(newvp); 2771 } 2772 return (error); 2773 } 2774 static char hextoasc[] = "0123456789abcdef"; 2775 2776 /* 2777 * Silly rename. To make the NFS filesystem that is stateless look a little 2778 * more like the "ufs" a remove of an active vnode is translated to a rename 2779 * to a funny looking filename that is removed by nfs_inactive on the 2780 * nfsnode. There is the potential for another process on a different client 2781 * to create the same funny name between the nfs_lookitup() fails and the 2782 * nfs_rename() completes, but... 2783 */ 2784 int 2785 nfs_sillyrename(dvp, vp, cnp) 2786 struct vnode *dvp, *vp; 2787 struct componentname *cnp; 2788 { 2789 struct sillyrename *sp; 2790 struct nfsnode *np; 2791 int error; 2792 short pid; 2793 2794 cache_purge(dvp); 2795 np = VTONFS(vp); 2796 #ifndef DIAGNOSTIC 2797 if (vp->v_type == VDIR) 2798 panic("nfs: sillyrename dir"); 2799 #endif 2800 MALLOC(sp, struct sillyrename *, sizeof (struct sillyrename), 2801 M_NFSREQ, M_WAITOK); 2802 sp->s_cred = crdup(cnp->cn_cred); 2803 sp->s_dvp = dvp; 2804 VREF(dvp); 2805 2806 /* Fudge together a funny name */ 2807 pid = cnp->cn_proc->p_pid; 2808 memcpy(sp->s_name, ".nfsAxxxx4.4", 13); 2809 sp->s_namlen = 12; 2810 sp->s_name[8] = hextoasc[pid & 0xf]; 2811 sp->s_name[7] = hextoasc[(pid >> 4) & 0xf]; 2812 sp->s_name[6] = hextoasc[(pid >> 8) & 0xf]; 2813 sp->s_name[5] = hextoasc[(pid >> 12) & 0xf]; 2814 2815 /* Try lookitups until we get one that isn't there */ 2816 while (nfs_lookitup(dvp, sp->s_name, sp->s_namlen, sp->s_cred, 2817 cnp->cn_proc, (struct nfsnode **)0) == 0) { 2818 sp->s_name[4]++; 2819 if (sp->s_name[4] > 'z') { 2820 error = EINVAL; 2821 goto bad; 2822 } 2823 } 2824 error = nfs_renameit(dvp, cnp, sp); 2825 if (error) 2826 goto bad; 2827 error = nfs_lookitup(dvp, sp->s_name, sp->s_namlen, sp->s_cred, 2828 cnp->cn_proc, &np); 2829 np->n_sillyrename = sp; 2830 return (0); 2831 bad: 2832 vrele(sp->s_dvp); 2833 crfree(sp->s_cred); 2834 free((caddr_t)sp, M_NFSREQ); 2835 return (error); 2836 } 2837 2838 /* 2839 * Look up a file name and optionally either update the file handle or 2840 * allocate an nfsnode, depending on the value of npp. 2841 * npp == NULL --> just do the lookup 2842 * *npp == NULL --> allocate a new nfsnode and make sure attributes are 2843 * handled too 2844 * *npp != NULL --> update the file handle in the vnode 2845 */ 2846 int 2847 nfs_lookitup(dvp, name, len, cred, procp, npp) 2848 struct vnode *dvp; 2849 const char *name; 2850 int len; 2851 struct ucred *cred; 2852 struct proc *procp; 2853 struct nfsnode **npp; 2854 { 2855 u_int32_t *tl; 2856 caddr_t cp; 2857 int32_t t1, t2; 2858 struct vnode *newvp = (struct vnode *)0; 2859 struct nfsnode *np, *dnp = VTONFS(dvp); 2860 caddr_t bpos, dpos, cp2; 2861 int error = 0, fhlen, attrflag; 2862 struct mbuf *mreq, *mrep, *md, *mb; 2863 nfsfh_t *nfhp; 2864 const int v3 = NFS_ISV3(dvp); 2865 2866 nfsstats.rpccnt[NFSPROC_LOOKUP]++; 2867 nfsm_reqhead(dnp, NFSPROC_LOOKUP, 2868 NFSX_FH(v3) + NFSX_UNSIGNED + nfsm_rndup(len)); 2869 nfsm_fhtom(dnp, v3); 2870 nfsm_strtom(name, len, NFS_MAXNAMLEN); 2871 nfsm_request(dnp, NFSPROC_LOOKUP, procp, cred); 2872 if (npp && !error) { 2873 nfsm_getfh(nfhp, fhlen, v3); 2874 if (*npp) { 2875 np = *npp; 2876 if (np->n_fhsize > NFS_SMALLFH && fhlen <= NFS_SMALLFH) { 2877 free((caddr_t)np->n_fhp, M_NFSBIGFH); 2878 np->n_fhp = &np->n_fh; 2879 } else if (np->n_fhsize <= NFS_SMALLFH && fhlen>NFS_SMALLFH) 2880 np->n_fhp =(nfsfh_t *)malloc(fhlen,M_NFSBIGFH,M_WAITOK); 2881 memcpy((caddr_t)np->n_fhp, (caddr_t)nfhp, fhlen); 2882 np->n_fhsize = fhlen; 2883 newvp = NFSTOV(np); 2884 } else if (NFS_CMPFH(dnp, nfhp, fhlen)) { 2885 VREF(dvp); 2886 newvp = dvp; 2887 } else { 2888 error = nfs_nget(dvp->v_mount, nfhp, fhlen, &np); 2889 if (error) { 2890 m_freem(mrep); 2891 return (error); 2892 } 2893 newvp = NFSTOV(np); 2894 } 2895 if (v3) { 2896 nfsm_postop_attr(newvp, attrflag, 0); 2897 if (!attrflag && *npp == NULL) { 2898 m_freem(mrep); 2899 vput(newvp); 2900 return (ENOENT); 2901 } 2902 } else 2903 nfsm_loadattr(newvp, (struct vattr *)0, 0); 2904 } 2905 nfsm_reqdone; 2906 if (npp && *npp == NULL) { 2907 if (error) { 2908 if (newvp) 2909 vput(newvp); 2910 } else 2911 *npp = np; 2912 } 2913 return (error); 2914 } 2915 2916 /* 2917 * Nfs Version 3 commit rpc 2918 */ 2919 int 2920 nfs_commit(vp, offset, cnt, procp) 2921 struct vnode *vp; 2922 off_t offset; 2923 uint32_t cnt; 2924 struct proc *procp; 2925 { 2926 caddr_t cp; 2927 u_int32_t *tl; 2928 int32_t t1, t2; 2929 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 2930 caddr_t bpos, dpos, cp2; 2931 int error = 0, wccflag = NFSV3_WCCRATTR; 2932 struct mbuf *mreq, *mrep, *md, *mb; 2933 struct nfsnode *np; 2934 2935 KASSERT(NFS_ISV3(vp)); 2936 2937 #ifdef NFS_DEBUG_COMMIT 2938 printf("commit %lu - %lu\n", (unsigned long)offset, 2939 (unsigned long)(offset + cnt)); 2940 #endif 2941 2942 simple_lock(&nmp->nm_slock); 2943 if ((nmp->nm_iflag & NFSMNT_HASWRITEVERF) == 0) { 2944 simple_unlock(&nmp->nm_slock); 2945 return (0); 2946 } 2947 simple_unlock(&nmp->nm_slock); 2948 nfsstats.rpccnt[NFSPROC_COMMIT]++; 2949 np = VTONFS(vp); 2950 nfsm_reqhead(np, NFSPROC_COMMIT, NFSX_FH(1)); 2951 nfsm_fhtom(np, 1); 2952 nfsm_build(tl, u_int32_t *, 3 * NFSX_UNSIGNED); 2953 txdr_hyper(offset, tl); 2954 tl += 2; 2955 *tl = txdr_unsigned(cnt); 2956 nfsm_request(np, NFSPROC_COMMIT, procp, VTONFS(vp)->n_wcred); 2957 nfsm_wcc_data(vp, wccflag, 0); 2958 if (!error) { 2959 nfsm_dissect(tl, u_int32_t *, NFSX_V3WRITEVERF); 2960 simple_lock(&nmp->nm_slock); 2961 if ((nmp->nm_iflag & NFSMNT_STALEWRITEVERF) || 2962 memcmp(nmp->nm_writeverf, tl, NFSX_V3WRITEVERF)) { 2963 memcpy(nmp->nm_writeverf, tl, NFSX_V3WRITEVERF); 2964 error = NFSERR_STALEWRITEVERF; 2965 nmp->nm_iflag |= NFSMNT_STALEWRITEVERF; 2966 } 2967 simple_unlock(&nmp->nm_slock); 2968 } 2969 nfsm_reqdone; 2970 return (error); 2971 } 2972 2973 /* 2974 * Kludge City.. 2975 * - make nfs_bmap() essentially a no-op that does no translation 2976 * - do nfs_strategy() by doing I/O with nfs_readrpc/nfs_writerpc 2977 * (Maybe I could use the process's page mapping, but I was concerned that 2978 * Kernel Write might not be enabled and also figured copyout() would do 2979 * a lot more work than memcpy() and also it currently happens in the 2980 * context of the swapper process (2). 2981 */ 2982 int 2983 nfs_bmap(v) 2984 void *v; 2985 { 2986 struct vop_bmap_args /* { 2987 struct vnode *a_vp; 2988 daddr_t a_bn; 2989 struct vnode **a_vpp; 2990 daddr_t *a_bnp; 2991 int *a_runp; 2992 } */ *ap = v; 2993 struct vnode *vp = ap->a_vp; 2994 int bshift = vp->v_mount->mnt_fs_bshift - vp->v_mount->mnt_dev_bshift; 2995 2996 if (ap->a_vpp != NULL) 2997 *ap->a_vpp = vp; 2998 if (ap->a_bnp != NULL) 2999 *ap->a_bnp = ap->a_bn << bshift; 3000 if (ap->a_runp != NULL) 3001 *ap->a_runp = 1024 * 1024; /* XXX */ 3002 return (0); 3003 } 3004 3005 /* 3006 * Strategy routine. 3007 * For async requests when nfsiod(s) are running, queue the request by 3008 * calling nfs_asyncio(), otherwise just all nfs_doio() to do the 3009 * request. 3010 */ 3011 int 3012 nfs_strategy(v) 3013 void *v; 3014 { 3015 struct vop_strategy_args *ap = v; 3016 struct buf *bp = ap->a_bp; 3017 struct proc *p; 3018 int error = 0; 3019 3020 if ((bp->b_flags & (B_PHYS|B_ASYNC)) == (B_PHYS|B_ASYNC)) 3021 panic("nfs physio/async"); 3022 if (bp->b_flags & B_ASYNC) 3023 p = NULL; 3024 else 3025 p = curproc; /* XXX */ 3026 3027 /* 3028 * If the op is asynchronous and an i/o daemon is waiting 3029 * queue the request, wake it up and wait for completion 3030 * otherwise just do it ourselves. 3031 */ 3032 3033 if ((bp->b_flags & B_ASYNC) == 0 || 3034 nfs_asyncio(bp)) 3035 error = nfs_doio(bp, p); 3036 return (error); 3037 } 3038 3039 /* 3040 * fsync vnode op. Just call nfs_flush() with commit == 1. 3041 */ 3042 /* ARGSUSED */ 3043 int 3044 nfs_fsync(v) 3045 void *v; 3046 { 3047 struct vop_fsync_args /* { 3048 struct vnodeop_desc *a_desc; 3049 struct vnode * a_vp; 3050 struct ucred * a_cred; 3051 int a_flags; 3052 off_t offlo; 3053 off_t offhi; 3054 struct proc * a_p; 3055 } */ *ap = v; 3056 3057 return (nfs_flush(ap->a_vp, ap->a_cred, 3058 (ap->a_flags & FSYNC_WAIT) != 0 ? MNT_WAIT : 0, ap->a_p, 1)); 3059 } 3060 3061 /* 3062 * Flush all the data associated with a vnode. 3063 */ 3064 int 3065 nfs_flush(vp, cred, waitfor, p, commit) 3066 struct vnode *vp; 3067 struct ucred *cred; 3068 int waitfor; 3069 struct proc *p; 3070 int commit; 3071 { 3072 struct nfsnode *np = VTONFS(vp); 3073 int error; 3074 int flushflags = PGO_ALLPAGES|PGO_CLEANIT|PGO_SYNCIO; 3075 UVMHIST_FUNC("nfs_flush"); UVMHIST_CALLED(ubchist); 3076 3077 simple_lock(&vp->v_interlock); 3078 error = VOP_PUTPAGES(vp, 0, 0, flushflags); 3079 if (np->n_flag & NWRITEERR) { 3080 error = np->n_error; 3081 np->n_flag &= ~NWRITEERR; 3082 } 3083 UVMHIST_LOG(ubchist, "returning %d", error,0,0,0); 3084 return (error); 3085 } 3086 3087 /* 3088 * Return POSIX pathconf information applicable to nfs. 3089 * 3090 * N.B. The NFS V2 protocol doesn't support this RPC. 3091 */ 3092 /* ARGSUSED */ 3093 int 3094 nfs_pathconf(v) 3095 void *v; 3096 { 3097 struct vop_pathconf_args /* { 3098 struct vnode *a_vp; 3099 int a_name; 3100 register_t *a_retval; 3101 } */ *ap = v; 3102 struct nfsv3_pathconf *pcp; 3103 struct vnode *vp = ap->a_vp; 3104 struct mbuf *mreq, *mrep, *md, *mb; 3105 int32_t t1, t2; 3106 u_int32_t *tl; 3107 caddr_t bpos, dpos, cp, cp2; 3108 int error = 0, attrflag; 3109 #ifndef NFS_V2_ONLY 3110 struct nfsmount *nmp; 3111 unsigned int l; 3112 u_int64_t maxsize; 3113 #endif 3114 const int v3 = NFS_ISV3(vp); 3115 struct nfsnode *np = VTONFS(vp); 3116 3117 switch (ap->a_name) { 3118 /* Names that can be resolved locally. */ 3119 case _PC_PIPE_BUF: 3120 *ap->a_retval = PIPE_BUF; 3121 break; 3122 case _PC_SYNC_IO: 3123 *ap->a_retval = 1; 3124 break; 3125 /* Names that cannot be resolved locally; do an RPC, if possible. */ 3126 case _PC_LINK_MAX: 3127 case _PC_NAME_MAX: 3128 case _PC_CHOWN_RESTRICTED: 3129 case _PC_NO_TRUNC: 3130 if (!v3) { 3131 error = EINVAL; 3132 break; 3133 } 3134 nfsstats.rpccnt[NFSPROC_PATHCONF]++; 3135 nfsm_reqhead(np, NFSPROC_PATHCONF, NFSX_FH(1)); 3136 nfsm_fhtom(np, 1); 3137 nfsm_request(np, NFSPROC_PATHCONF, 3138 curproc, curproc->p_ucred); /* XXX */ 3139 nfsm_postop_attr(vp, attrflag, 0); 3140 if (!error) { 3141 nfsm_dissect(pcp, struct nfsv3_pathconf *, 3142 NFSX_V3PATHCONF); 3143 switch (ap->a_name) { 3144 case _PC_LINK_MAX: 3145 *ap->a_retval = 3146 fxdr_unsigned(register_t, pcp->pc_linkmax); 3147 break; 3148 case _PC_NAME_MAX: 3149 *ap->a_retval = 3150 fxdr_unsigned(register_t, pcp->pc_namemax); 3151 break; 3152 case _PC_CHOWN_RESTRICTED: 3153 *ap->a_retval = 3154 (pcp->pc_chownrestricted == nfs_true); 3155 break; 3156 case _PC_NO_TRUNC: 3157 *ap->a_retval = 3158 (pcp->pc_notrunc == nfs_true); 3159 break; 3160 } 3161 } 3162 nfsm_reqdone; 3163 break; 3164 case _PC_FILESIZEBITS: 3165 #ifndef NFS_V2_ONLY 3166 if (v3) { 3167 nmp = VFSTONFS(vp->v_mount); 3168 if ((nmp->nm_iflag & NFSMNT_GOTFSINFO) == 0) 3169 if ((error = nfs_fsinfo(nmp, vp, 3170 curproc->p_ucred, curproc)) != 0) /* XXX */ 3171 break; 3172 for (l = 0, maxsize = nmp->nm_maxfilesize; 3173 (maxsize >> l) > 0; l++) 3174 ; 3175 *ap->a_retval = l + 1; 3176 } else 3177 #endif 3178 { 3179 *ap->a_retval = 32; /* NFS V2 limitation */ 3180 } 3181 break; 3182 default: 3183 error = EINVAL; 3184 break; 3185 } 3186 3187 return (error); 3188 } 3189 3190 /* 3191 * NFS advisory byte-level locks. 3192 */ 3193 int 3194 nfs_advlock(v) 3195 void *v; 3196 { 3197 struct vop_advlock_args /* { 3198 struct vnode *a_vp; 3199 caddr_t a_id; 3200 int a_op; 3201 struct flock *a_fl; 3202 int a_flags; 3203 } */ *ap = v; 3204 struct nfsnode *np = VTONFS(ap->a_vp); 3205 3206 return lf_advlock(ap, &np->n_lockf, np->n_size); 3207 } 3208 3209 /* 3210 * Print out the contents of an nfsnode. 3211 */ 3212 int 3213 nfs_print(v) 3214 void *v; 3215 { 3216 struct vop_print_args /* { 3217 struct vnode *a_vp; 3218 } */ *ap = v; 3219 struct vnode *vp = ap->a_vp; 3220 struct nfsnode *np = VTONFS(vp); 3221 3222 printf("tag VT_NFS, fileid %ld fsid 0x%lx", 3223 np->n_vattr->va_fileid, np->n_vattr->va_fsid); 3224 if (vp->v_type == VFIFO) 3225 fifo_printinfo(vp); 3226 printf("\n"); 3227 return (0); 3228 } 3229 3230 /* 3231 * NFS file truncation. 3232 */ 3233 int 3234 nfs_truncate(v) 3235 void *v; 3236 { 3237 #if 0 3238 struct vop_truncate_args /* { 3239 struct vnode *a_vp; 3240 off_t a_length; 3241 int a_flags; 3242 struct ucred *a_cred; 3243 struct proc *a_p; 3244 } */ *ap = v; 3245 #endif 3246 3247 /* Use nfs_setattr */ 3248 return (EOPNOTSUPP); 3249 } 3250 3251 /* 3252 * NFS update. 3253 */ 3254 int 3255 nfs_update(v) 3256 void *v; 3257 #if 0 3258 struct vop_update_args /* { 3259 struct vnode *a_vp; 3260 struct timespec *a_ta; 3261 struct timespec *a_tm; 3262 int a_waitfor; 3263 } */ *ap = v; 3264 #endif 3265 { 3266 3267 /* Use nfs_setattr */ 3268 return (EOPNOTSUPP); 3269 } 3270 3271 /* 3272 * Just call bwrite(). 3273 */ 3274 int 3275 nfs_bwrite(v) 3276 void *v; 3277 { 3278 struct vop_bwrite_args /* { 3279 struct vnode *a_bp; 3280 } */ *ap = v; 3281 3282 return (bwrite(ap->a_bp)); 3283 } 3284 3285 /* 3286 * nfs unlock wrapper. 3287 */ 3288 int 3289 nfs_unlock(void *v) 3290 { 3291 struct vop_unlock_args /* { 3292 struct vnode *a_vp; 3293 int a_flags; 3294 } */ *ap = v; 3295 struct vnode *vp = ap->a_vp; 3296 3297 /* 3298 * VOP_UNLOCK can be called by nfs_loadattrcache 3299 * with v_data == 0. 3300 */ 3301 if (VTONFS(vp)) { 3302 nfs_delayedtruncate(vp); 3303 } 3304 3305 return genfs_unlock(v); 3306 } 3307 3308 /* 3309 * nfs special file access vnode op. 3310 * Essentially just get vattr and then imitate iaccess() since the device is 3311 * local to the client. 3312 */ 3313 int 3314 nfsspec_access(v) 3315 void *v; 3316 { 3317 struct vop_access_args /* { 3318 struct vnode *a_vp; 3319 int a_mode; 3320 struct ucred *a_cred; 3321 struct proc *a_p; 3322 } */ *ap = v; 3323 struct vattr va; 3324 struct vnode *vp = ap->a_vp; 3325 int error; 3326 3327 error = VOP_GETATTR(vp, &va, ap->a_cred, ap->a_p); 3328 if (error) 3329 return (error); 3330 3331 /* 3332 * Disallow write attempts on filesystems mounted read-only; 3333 * unless the file is a socket, fifo, or a block or character 3334 * device resident on the filesystem. 3335 */ 3336 if ((ap->a_mode & VWRITE) && (vp->v_mount->mnt_flag & MNT_RDONLY)) { 3337 switch (vp->v_type) { 3338 case VREG: 3339 case VDIR: 3340 case VLNK: 3341 return (EROFS); 3342 default: 3343 break; 3344 } 3345 } 3346 3347 return (vaccess(va.va_type, va.va_mode, 3348 va.va_uid, va.va_gid, ap->a_mode, ap->a_cred)); 3349 } 3350 3351 /* 3352 * Read wrapper for special devices. 3353 */ 3354 int 3355 nfsspec_read(v) 3356 void *v; 3357 { 3358 struct vop_read_args /* { 3359 struct vnode *a_vp; 3360 struct uio *a_uio; 3361 int a_ioflag; 3362 struct ucred *a_cred; 3363 } */ *ap = v; 3364 struct nfsnode *np = VTONFS(ap->a_vp); 3365 3366 /* 3367 * Set access flag. 3368 */ 3369 np->n_flag |= NACC; 3370 np->n_atim.tv_sec = time.tv_sec; 3371 np->n_atim.tv_nsec = time.tv_usec * 1000; 3372 return (VOCALL(spec_vnodeop_p, VOFFSET(vop_read), ap)); 3373 } 3374 3375 /* 3376 * Write wrapper for special devices. 3377 */ 3378 int 3379 nfsspec_write(v) 3380 void *v; 3381 { 3382 struct vop_write_args /* { 3383 struct vnode *a_vp; 3384 struct uio *a_uio; 3385 int a_ioflag; 3386 struct ucred *a_cred; 3387 } */ *ap = v; 3388 struct nfsnode *np = VTONFS(ap->a_vp); 3389 3390 /* 3391 * Set update flag. 3392 */ 3393 np->n_flag |= NUPD; 3394 np->n_mtim.tv_sec = time.tv_sec; 3395 np->n_mtim.tv_nsec = time.tv_usec * 1000; 3396 return (VOCALL(spec_vnodeop_p, VOFFSET(vop_write), ap)); 3397 } 3398 3399 /* 3400 * Close wrapper for special devices. 3401 * 3402 * Update the times on the nfsnode then do device close. 3403 */ 3404 int 3405 nfsspec_close(v) 3406 void *v; 3407 { 3408 struct vop_close_args /* { 3409 struct vnode *a_vp; 3410 int a_fflag; 3411 struct ucred *a_cred; 3412 struct proc *a_p; 3413 } */ *ap = v; 3414 struct vnode *vp = ap->a_vp; 3415 struct nfsnode *np = VTONFS(vp); 3416 struct vattr vattr; 3417 3418 if (np->n_flag & (NACC | NUPD)) { 3419 np->n_flag |= NCHG; 3420 if (vp->v_usecount == 1 && 3421 (vp->v_mount->mnt_flag & MNT_RDONLY) == 0) { 3422 VATTR_NULL(&vattr); 3423 if (np->n_flag & NACC) 3424 vattr.va_atime = np->n_atim; 3425 if (np->n_flag & NUPD) 3426 vattr.va_mtime = np->n_mtim; 3427 (void)VOP_SETATTR(vp, &vattr, ap->a_cred, ap->a_p); 3428 } 3429 } 3430 return (VOCALL(spec_vnodeop_p, VOFFSET(vop_close), ap)); 3431 } 3432 3433 /* 3434 * Read wrapper for fifos. 3435 */ 3436 int 3437 nfsfifo_read(v) 3438 void *v; 3439 { 3440 struct vop_read_args /* { 3441 struct vnode *a_vp; 3442 struct uio *a_uio; 3443 int a_ioflag; 3444 struct ucred *a_cred; 3445 } */ *ap = v; 3446 struct nfsnode *np = VTONFS(ap->a_vp); 3447 3448 /* 3449 * Set access flag. 3450 */ 3451 np->n_flag |= NACC; 3452 np->n_atim.tv_sec = time.tv_sec; 3453 np->n_atim.tv_nsec = time.tv_usec * 1000; 3454 return (VOCALL(fifo_vnodeop_p, VOFFSET(vop_read), ap)); 3455 } 3456 3457 /* 3458 * Write wrapper for fifos. 3459 */ 3460 int 3461 nfsfifo_write(v) 3462 void *v; 3463 { 3464 struct vop_write_args /* { 3465 struct vnode *a_vp; 3466 struct uio *a_uio; 3467 int a_ioflag; 3468 struct ucred *a_cred; 3469 } */ *ap = v; 3470 struct nfsnode *np = VTONFS(ap->a_vp); 3471 3472 /* 3473 * Set update flag. 3474 */ 3475 np->n_flag |= NUPD; 3476 np->n_mtim.tv_sec = time.tv_sec; 3477 np->n_mtim.tv_nsec = time.tv_usec * 1000; 3478 return (VOCALL(fifo_vnodeop_p, VOFFSET(vop_write), ap)); 3479 } 3480 3481 /* 3482 * Close wrapper for fifos. 3483 * 3484 * Update the times on the nfsnode then do fifo close. 3485 */ 3486 int 3487 nfsfifo_close(v) 3488 void *v; 3489 { 3490 struct vop_close_args /* { 3491 struct vnode *a_vp; 3492 int a_fflag; 3493 struct ucred *a_cred; 3494 struct proc *a_p; 3495 } */ *ap = v; 3496 struct vnode *vp = ap->a_vp; 3497 struct nfsnode *np = VTONFS(vp); 3498 struct vattr vattr; 3499 3500 if (np->n_flag & (NACC | NUPD)) { 3501 if (np->n_flag & NACC) { 3502 np->n_atim.tv_sec = time.tv_sec; 3503 np->n_atim.tv_nsec = time.tv_usec * 1000; 3504 } 3505 if (np->n_flag & NUPD) { 3506 np->n_mtim.tv_sec = time.tv_sec; 3507 np->n_mtim.tv_nsec = time.tv_usec * 1000; 3508 } 3509 np->n_flag |= NCHG; 3510 if (vp->v_usecount == 1 && 3511 (vp->v_mount->mnt_flag & MNT_RDONLY) == 0) { 3512 VATTR_NULL(&vattr); 3513 if (np->n_flag & NACC) 3514 vattr.va_atime = np->n_atim; 3515 if (np->n_flag & NUPD) 3516 vattr.va_mtime = np->n_mtim; 3517 (void)VOP_SETATTR(vp, &vattr, ap->a_cred, ap->a_p); 3518 } 3519 } 3520 return (VOCALL(fifo_vnodeop_p, VOFFSET(vop_close), ap)); 3521 } 3522
Indexes created Mon Sep 29 21:09:56 GMT 2025