nfs_vnops.c revision 1.147
1 /* $NetBSD: nfs_vnops.c,v 1.147 2001/12/08 04:10:00 lukem Exp $ */ 2 3 /* 4 * Copyright (c) 1989, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * This code is derived from software contributed to Berkeley by 8 * Rick Macklem at The University of Guelph. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the University of 21 * California, Berkeley and its contributors. 22 * 4. Neither the name of the University nor the names of its contributors 23 * may be used to endorse or promote products derived from this software 24 * without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 27 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 28 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 29 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 30 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 31 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 32 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 33 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 34 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 35 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 36 * SUCH DAMAGE. 37 * 38 * @(#)nfs_vnops.c 8.19 (Berkeley) 7/31/95 39 */ 40 41 /* 42 * vnode op calls for Sun NFS version 2 and 3 43 */ 44 45 #include <sys/cdefs.h> 46 __KERNEL_RCSID(0, "$NetBSD: nfs_vnops.c,v 1.147 2001/12/08 04:10:00 lukem Exp $"); 47 48 #include "opt_nfs.h" 49 #include "opt_uvmhist.h" 50 51 #include <sys/param.h> 52 #include <sys/proc.h> 53 #include <sys/kernel.h> 54 #include <sys/systm.h> 55 #include <sys/resourcevar.h> 56 #include <sys/proc.h> 57 #include <sys/mount.h> 58 #include <sys/buf.h> 59 #include <sys/malloc.h> 60 #include <sys/mbuf.h> 61 #include <sys/namei.h> 62 #include <sys/vnode.h> 63 #include <sys/dirent.h> 64 #include <sys/fcntl.h> 65 #include <sys/hash.h> 66 #include <sys/lockf.h> 67 #include <sys/stat.h> 68 #include <sys/unistd.h> 69 70 #include <uvm/uvm_extern.h> 71 #include <uvm/uvm.h> 72 73 #include <miscfs/fifofs/fifo.h> 74 #include <miscfs/genfs/genfs.h> 75 #include <miscfs/specfs/specdev.h> 76 77 #include <nfs/rpcv2.h> 78 #include <nfs/nfsproto.h> 79 #include <nfs/nfs.h> 80 #include <nfs/nfsnode.h> 81 #include <nfs/nfsmount.h> 82 #include <nfs/xdr_subs.h> 83 #include <nfs/nfsm_subs.h> 84 #include <nfs/nqnfs.h> 85 #include <nfs/nfs_var.h> 86 87 #include <net/if.h> 88 #include <netinet/in.h> 89 #include <netinet/in_var.h> 90 91 /* Defs */ 92 #define TRUE 1 93 #define FALSE 0 94 95 /* 96 * Global vfs data structures for nfs 97 */ 98 int (**nfsv2_vnodeop_p) __P((void *)); 99 const struct vnodeopv_entry_desc nfsv2_vnodeop_entries[] = { 100 { &vop_default_desc, vn_default_error }, 101 { &vop_lookup_desc, nfs_lookup }, /* lookup */ 102 { &vop_create_desc, nfs_create }, /* create */ 103 { &vop_mknod_desc, nfs_mknod }, /* mknod */ 104 { &vop_open_desc, nfs_open }, /* open */ 105 { &vop_close_desc, nfs_close }, /* close */ 106 { &vop_access_desc, nfs_access }, /* access */ 107 { &vop_getattr_desc, nfs_getattr }, /* getattr */ 108 { &vop_setattr_desc, nfs_setattr }, /* setattr */ 109 { &vop_read_desc, nfs_read }, /* read */ 110 { &vop_write_desc, nfs_write }, /* write */ 111 { &vop_lease_desc, nfs_lease_check }, /* lease */ 112 { &vop_fcntl_desc, genfs_fcntl }, /* fcntl */ 113 { &vop_ioctl_desc, nfs_ioctl }, /* ioctl */ 114 { &vop_poll_desc, nfs_poll }, /* poll */ 115 { &vop_revoke_desc, nfs_revoke }, /* revoke */ 116 { &vop_mmap_desc, nfs_mmap }, /* mmap */ 117 { &vop_fsync_desc, nfs_fsync }, /* fsync */ 118 { &vop_seek_desc, nfs_seek }, /* seek */ 119 { &vop_remove_desc, nfs_remove }, /* remove */ 120 { &vop_link_desc, nfs_link }, /* link */ 121 { &vop_rename_desc, nfs_rename }, /* rename */ 122 { &vop_mkdir_desc, nfs_mkdir }, /* mkdir */ 123 { &vop_rmdir_desc, nfs_rmdir }, /* rmdir */ 124 { &vop_symlink_desc, nfs_symlink }, /* symlink */ 125 { &vop_readdir_desc, nfs_readdir }, /* readdir */ 126 { &vop_readlink_desc, nfs_readlink }, /* readlink */ 127 { &vop_abortop_desc, nfs_abortop }, /* abortop */ 128 { &vop_inactive_desc, nfs_inactive }, /* inactive */ 129 { &vop_reclaim_desc, nfs_reclaim }, /* reclaim */ 130 { &vop_lock_desc, nfs_lock }, /* lock */ 131 { &vop_unlock_desc, nfs_unlock }, /* unlock */ 132 { &vop_bmap_desc, nfs_bmap }, /* bmap */ 133 { &vop_strategy_desc, nfs_strategy }, /* strategy */ 134 { &vop_print_desc, nfs_print }, /* print */ 135 { &vop_islocked_desc, nfs_islocked }, /* islocked */ 136 { &vop_pathconf_desc, nfs_pathconf }, /* pathconf */ 137 { &vop_advlock_desc, nfs_advlock }, /* advlock */ 138 { &vop_blkatoff_desc, nfs_blkatoff }, /* blkatoff */ 139 { &vop_valloc_desc, nfs_valloc }, /* valloc */ 140 { &vop_reallocblks_desc, nfs_reallocblks }, /* reallocblks */ 141 { &vop_vfree_desc, nfs_vfree }, /* vfree */ 142 { &vop_truncate_desc, nfs_truncate }, /* truncate */ 143 { &vop_update_desc, nfs_update }, /* update */ 144 { &vop_bwrite_desc, nfs_bwrite }, /* bwrite */ 145 { &vop_getpages_desc, nfs_getpages }, /* getpages */ 146 { &vop_putpages_desc, genfs_putpages }, /* putpages */ 147 { NULL, NULL } 148 }; 149 const struct vnodeopv_desc nfsv2_vnodeop_opv_desc = 150 { &nfsv2_vnodeop_p, nfsv2_vnodeop_entries }; 151 152 /* 153 * Special device vnode ops 154 */ 155 int (**spec_nfsv2nodeop_p) __P((void *)); 156 const struct vnodeopv_entry_desc spec_nfsv2nodeop_entries[] = { 157 { &vop_default_desc, vn_default_error }, 158 { &vop_lookup_desc, spec_lookup }, /* lookup */ 159 { &vop_create_desc, spec_create }, /* create */ 160 { &vop_mknod_desc, spec_mknod }, /* mknod */ 161 { &vop_open_desc, spec_open }, /* open */ 162 { &vop_close_desc, nfsspec_close }, /* close */ 163 { &vop_access_desc, nfsspec_access }, /* access */ 164 { &vop_getattr_desc, nfs_getattr }, /* getattr */ 165 { &vop_setattr_desc, nfs_setattr }, /* setattr */ 166 { &vop_read_desc, nfsspec_read }, /* read */ 167 { &vop_write_desc, nfsspec_write }, /* write */ 168 { &vop_lease_desc, spec_lease_check }, /* lease */ 169 { &vop_fcntl_desc, genfs_fcntl }, /* fcntl */ 170 { &vop_ioctl_desc, spec_ioctl }, /* ioctl */ 171 { &vop_poll_desc, spec_poll }, /* poll */ 172 { &vop_revoke_desc, spec_revoke }, /* revoke */ 173 { &vop_mmap_desc, spec_mmap }, /* mmap */ 174 { &vop_fsync_desc, spec_fsync }, /* fsync */ 175 { &vop_seek_desc, spec_seek }, /* seek */ 176 { &vop_remove_desc, spec_remove }, /* remove */ 177 { &vop_link_desc, spec_link }, /* link */ 178 { &vop_rename_desc, spec_rename }, /* rename */ 179 { &vop_mkdir_desc, spec_mkdir }, /* mkdir */ 180 { &vop_rmdir_desc, spec_rmdir }, /* rmdir */ 181 { &vop_symlink_desc, spec_symlink }, /* symlink */ 182 { &vop_readdir_desc, spec_readdir }, /* readdir */ 183 { &vop_readlink_desc, spec_readlink }, /* readlink */ 184 { &vop_abortop_desc, spec_abortop }, /* abortop */ 185 { &vop_inactive_desc, nfs_inactive }, /* inactive */ 186 { &vop_reclaim_desc, nfs_reclaim }, /* reclaim */ 187 { &vop_lock_desc, nfs_lock }, /* lock */ 188 { &vop_unlock_desc, nfs_unlock }, /* unlock */ 189 { &vop_bmap_desc, spec_bmap }, /* bmap */ 190 { &vop_strategy_desc, spec_strategy }, /* strategy */ 191 { &vop_print_desc, nfs_print }, /* print */ 192 { &vop_islocked_desc, nfs_islocked }, /* islocked */ 193 { &vop_pathconf_desc, spec_pathconf }, /* pathconf */ 194 { &vop_advlock_desc, spec_advlock }, /* advlock */ 195 { &vop_blkatoff_desc, spec_blkatoff }, /* blkatoff */ 196 { &vop_valloc_desc, spec_valloc }, /* valloc */ 197 { &vop_reallocblks_desc, spec_reallocblks }, /* reallocblks */ 198 { &vop_vfree_desc, spec_vfree }, /* vfree */ 199 { &vop_truncate_desc, spec_truncate }, /* truncate */ 200 { &vop_update_desc, nfs_update }, /* update */ 201 { &vop_bwrite_desc, vn_bwrite }, /* bwrite */ 202 { &vop_getpages_desc, spec_getpages }, /* getpages */ 203 { &vop_putpages_desc, spec_putpages }, /* putpages */ 204 { NULL, NULL } 205 }; 206 const struct vnodeopv_desc spec_nfsv2nodeop_opv_desc = 207 { &spec_nfsv2nodeop_p, spec_nfsv2nodeop_entries }; 208 209 int (**fifo_nfsv2nodeop_p) __P((void *)); 210 const struct vnodeopv_entry_desc fifo_nfsv2nodeop_entries[] = { 211 { &vop_default_desc, vn_default_error }, 212 { &vop_lookup_desc, fifo_lookup }, /* lookup */ 213 { &vop_create_desc, fifo_create }, /* create */ 214 { &vop_mknod_desc, fifo_mknod }, /* mknod */ 215 { &vop_open_desc, fifo_open }, /* open */ 216 { &vop_close_desc, nfsfifo_close }, /* close */ 217 { &vop_access_desc, nfsspec_access }, /* access */ 218 { &vop_getattr_desc, nfs_getattr }, /* getattr */ 219 { &vop_setattr_desc, nfs_setattr }, /* setattr */ 220 { &vop_read_desc, nfsfifo_read }, /* read */ 221 { &vop_write_desc, nfsfifo_write }, /* write */ 222 { &vop_lease_desc, fifo_lease_check }, /* lease */ 223 { &vop_fcntl_desc, genfs_fcntl }, /* fcntl */ 224 { &vop_ioctl_desc, fifo_ioctl }, /* ioctl */ 225 { &vop_poll_desc, fifo_poll }, /* poll */ 226 { &vop_revoke_desc, fifo_revoke }, /* revoke */ 227 { &vop_mmap_desc, fifo_mmap }, /* mmap */ 228 { &vop_fsync_desc, nfs_fsync }, /* fsync */ 229 { &vop_seek_desc, fifo_seek }, /* seek */ 230 { &vop_remove_desc, fifo_remove }, /* remove */ 231 { &vop_link_desc, fifo_link }, /* link */ 232 { &vop_rename_desc, fifo_rename }, /* rename */ 233 { &vop_mkdir_desc, fifo_mkdir }, /* mkdir */ 234 { &vop_rmdir_desc, fifo_rmdir }, /* rmdir */ 235 { &vop_symlink_desc, fifo_symlink }, /* symlink */ 236 { &vop_readdir_desc, fifo_readdir }, /* readdir */ 237 { &vop_readlink_desc, fifo_readlink }, /* readlink */ 238 { &vop_abortop_desc, fifo_abortop }, /* abortop */ 239 { &vop_inactive_desc, nfs_inactive }, /* inactive */ 240 { &vop_reclaim_desc, nfs_reclaim }, /* reclaim */ 241 { &vop_lock_desc, nfs_lock }, /* lock */ 242 { &vop_unlock_desc, nfs_unlock }, /* unlock */ 243 { &vop_bmap_desc, fifo_bmap }, /* bmap */ 244 { &vop_strategy_desc, genfs_badop }, /* strategy */ 245 { &vop_print_desc, nfs_print }, /* print */ 246 { &vop_islocked_desc, nfs_islocked }, /* islocked */ 247 { &vop_pathconf_desc, fifo_pathconf }, /* pathconf */ 248 { &vop_advlock_desc, fifo_advlock }, /* advlock */ 249 { &vop_blkatoff_desc, fifo_blkatoff }, /* blkatoff */ 250 { &vop_valloc_desc, fifo_valloc }, /* valloc */ 251 { &vop_reallocblks_desc, fifo_reallocblks }, /* reallocblks */ 252 { &vop_vfree_desc, fifo_vfree }, /* vfree */ 253 { &vop_truncate_desc, fifo_truncate }, /* truncate */ 254 { &vop_update_desc, nfs_update }, /* update */ 255 { &vop_bwrite_desc, vn_bwrite }, /* bwrite */ 256 { &vop_putpages_desc, fifo_putpages }, /* putpages */ 257 { NULL, NULL } 258 }; 259 const struct vnodeopv_desc fifo_nfsv2nodeop_opv_desc = 260 { &fifo_nfsv2nodeop_p, fifo_nfsv2nodeop_entries }; 261 262 /* 263 * Global variables 264 */ 265 extern u_int32_t nfs_true, nfs_false; 266 extern u_int32_t nfs_xdrneg1; 267 extern struct nfsstats nfsstats; 268 extern nfstype nfsv3_type[9]; 269 struct proc *nfs_iodwant[NFS_MAXASYNCDAEMON]; 270 struct nfsmount *nfs_iodmount[NFS_MAXASYNCDAEMON]; 271 int nfs_numasync = 0; 272 #define DIRHDSIZ (sizeof (struct dirent) - (MAXNAMLEN + 1)) 273 274 /* 275 * nfs null call from vfs. 276 */ 277 int 278 nfs_null(vp, cred, procp) 279 struct vnode *vp; 280 struct ucred *cred; 281 struct proc *procp; 282 { 283 caddr_t bpos, dpos; 284 int error = 0; 285 struct mbuf *mreq, *mrep, *md, *mb; 286 287 nfsm_reqhead(vp, NFSPROC_NULL, 0); 288 nfsm_request(vp, NFSPROC_NULL, procp, cred); 289 nfsm_reqdone; 290 return (error); 291 } 292 293 /* 294 * nfs access vnode op. 295 * For nfs version 2, just return ok. File accesses may fail later. 296 * For nfs version 3, use the access rpc to check accessibility. If file modes 297 * are changed on the server, accesses might still fail later. 298 */ 299 int 300 nfs_access(v) 301 void *v; 302 { 303 struct vop_access_args /* { 304 struct vnode *a_vp; 305 int a_mode; 306 struct ucred *a_cred; 307 struct proc *a_p; 308 } */ *ap = v; 309 struct vnode *vp = ap->a_vp; 310 u_int32_t *tl; 311 caddr_t cp; 312 int32_t t1, t2; 313 caddr_t bpos, dpos, cp2; 314 int error = 0, attrflag, cachevalid; 315 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 316 u_int32_t mode, rmode; 317 const int v3 = NFS_ISV3(vp); 318 struct nfsnode *np = VTONFS(vp); 319 320 cachevalid = (np->n_accstamp != -1 && 321 (time.tv_sec - np->n_accstamp) < NFS_ATTRTIMEO(np) && 322 np->n_accuid == ap->a_cred->cr_uid); 323 324 /* 325 * Check access cache first. If this request has been made for this 326 * uid shortly before, use the cached result. 327 */ 328 if (cachevalid) { 329 if (!np->n_accerror) { 330 if ((np->n_accmode & ap->a_mode) == ap->a_mode) 331 return np->n_accerror; 332 } else if ((np->n_accmode & ap->a_mode) == np->n_accmode) 333 return np->n_accerror; 334 } 335 336 /* 337 * For nfs v3, do an access rpc, otherwise you are stuck emulating 338 * ufs_access() locally using the vattr. This may not be correct, 339 * since the server may apply other access criteria such as 340 * client uid-->server uid mapping that we do not know about, but 341 * this is better than just returning anything that is lying about 342 * in the cache. 343 */ 344 if (v3) { 345 nfsstats.rpccnt[NFSPROC_ACCESS]++; 346 nfsm_reqhead(vp, NFSPROC_ACCESS, NFSX_FH(v3) + NFSX_UNSIGNED); 347 nfsm_fhtom(vp, v3); 348 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); 349 if (ap->a_mode & VREAD) 350 mode = NFSV3ACCESS_READ; 351 else 352 mode = 0; 353 if (vp->v_type != VDIR) { 354 if (ap->a_mode & VWRITE) 355 mode |= (NFSV3ACCESS_MODIFY | NFSV3ACCESS_EXTEND); 356 if (ap->a_mode & VEXEC) 357 mode |= NFSV3ACCESS_EXECUTE; 358 } else { 359 if (ap->a_mode & VWRITE) 360 mode |= (NFSV3ACCESS_MODIFY | NFSV3ACCESS_EXTEND | 361 NFSV3ACCESS_DELETE); 362 if (ap->a_mode & VEXEC) 363 mode |= NFSV3ACCESS_LOOKUP; 364 } 365 *tl = txdr_unsigned(mode); 366 nfsm_request(vp, NFSPROC_ACCESS, ap->a_p, ap->a_cred); 367 nfsm_postop_attr(vp, attrflag); 368 if (!error) { 369 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 370 rmode = fxdr_unsigned(u_int32_t, *tl); 371 /* 372 * The NFS V3 spec does not clarify whether or not 373 * the returned access bits can be a superset of 374 * the ones requested, so... 375 */ 376 if ((rmode & mode) != mode) 377 error = EACCES; 378 } 379 nfsm_reqdone; 380 } else 381 return (nfsspec_access(ap)); 382 /* 383 * Disallow write attempts on filesystems mounted read-only; 384 * unless the file is a socket, fifo, or a block or character 385 * device resident on the filesystem. 386 */ 387 if (!error && (ap->a_mode & VWRITE) && 388 (vp->v_mount->mnt_flag & MNT_RDONLY)) { 389 switch (vp->v_type) { 390 case VREG: 391 case VDIR: 392 case VLNK: 393 error = EROFS; 394 default: 395 break; 396 } 397 } 398 399 if (!error || error == EACCES) { 400 /* 401 * If we got the same result as for a previous, 402 * different request, OR it in. Don't update 403 * the timestamp in that case. 404 */ 405 if (cachevalid && error == np->n_accerror) { 406 if (!error) 407 np->n_accmode |= ap->a_mode; 408 else if ((np->n_accmode & ap->a_mode) == ap->a_mode) 409 np->n_accmode = ap->a_mode; 410 } else { 411 np->n_accstamp = time.tv_sec; 412 np->n_accuid = ap->a_cred->cr_uid; 413 np->n_accmode = ap->a_mode; 414 np->n_accerror = error; 415 } 416 } 417 418 return (error); 419 } 420 421 /* 422 * nfs open vnode op 423 * Check to see if the type is ok 424 * and that deletion is not in progress. 425 * For paged in text files, you will need to flush the page cache 426 * if consistency is lost. 427 */ 428 /* ARGSUSED */ 429 int 430 nfs_open(v) 431 void *v; 432 { 433 struct vop_open_args /* { 434 struct vnode *a_vp; 435 int a_mode; 436 struct ucred *a_cred; 437 struct proc *a_p; 438 } */ *ap = v; 439 struct vnode *vp = ap->a_vp; 440 struct nfsnode *np = VTONFS(vp); 441 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 442 struct vattr vattr; 443 int error; 444 445 if (vp->v_type != VREG && vp->v_type != VDIR && vp->v_type != VLNK) { 446 return (EACCES); 447 } 448 449 /* 450 * Initialize read and write creds here, for swapfiles 451 * and other paths that don't set the creds themselves. 452 */ 453 454 if (ap->a_mode & FREAD) { 455 if (np->n_rcred) { 456 crfree(np->n_rcred); 457 } 458 np->n_rcred = ap->a_cred; 459 crhold(np->n_rcred); 460 } 461 if (ap->a_mode & FWRITE) { 462 if (np->n_wcred) { 463 crfree(np->n_wcred); 464 } 465 np->n_wcred = ap->a_cred; 466 crhold(np->n_wcred); 467 } 468 469 #ifndef NFS_V2_ONLY 470 /* 471 * Get a valid lease. If cached data is stale, flush it. 472 */ 473 if (nmp->nm_flag & NFSMNT_NQNFS) { 474 if (NQNFS_CKINVALID(vp, np, ND_READ)) { 475 do { 476 error = nqnfs_getlease(vp, ND_READ, ap->a_cred, 477 ap->a_p); 478 } while (error == NQNFS_EXPIRED); 479 if (error) 480 return (error); 481 if (np->n_lrev != np->n_brev || 482 (np->n_flag & NQNFSNONCACHE)) { 483 if ((error = nfs_vinvalbuf(vp, V_SAVE, ap->a_cred, 484 ap->a_p, 1)) == EINTR) 485 return (error); 486 np->n_brev = np->n_lrev; 487 } 488 } 489 } else 490 #endif 491 { 492 if (np->n_flag & NMODIFIED) { 493 if ((error = nfs_vinvalbuf(vp, V_SAVE, ap->a_cred, 494 ap->a_p, 1)) == EINTR) 495 return (error); 496 np->n_attrstamp = 0; 497 if (vp->v_type == VDIR) { 498 nfs_invaldircache(vp, 0); 499 np->n_direofoffset = 0; 500 } 501 error = VOP_GETATTR(vp, &vattr, ap->a_cred, ap->a_p); 502 if (error) 503 return (error); 504 np->n_mtime = vattr.va_mtime.tv_sec; 505 } else { 506 error = VOP_GETATTR(vp, &vattr, ap->a_cred, ap->a_p); 507 if (error) 508 return (error); 509 if (np->n_mtime != vattr.va_mtime.tv_sec) { 510 if (vp->v_type == VDIR) { 511 nfs_invaldircache(vp, 0); 512 np->n_direofoffset = 0; 513 } 514 if ((error = nfs_vinvalbuf(vp, V_SAVE, 515 ap->a_cred, ap->a_p, 1)) == EINTR) 516 return (error); 517 np->n_mtime = vattr.va_mtime.tv_sec; 518 } 519 } 520 } 521 if ((nmp->nm_flag & NFSMNT_NQNFS) == 0) 522 np->n_attrstamp = 0; /* For Open/Close consistency */ 523 return (0); 524 } 525 526 /* 527 * nfs close vnode op 528 * What an NFS client should do upon close after writing is a debatable issue. 529 * Most NFS clients push delayed writes to the server upon close, basically for 530 * two reasons: 531 * 1 - So that any write errors may be reported back to the client process 532 * doing the close system call. By far the two most likely errors are 533 * NFSERR_NOSPC and NFSERR_DQUOT to indicate space allocation failure. 534 * 2 - To put a worst case upper bound on cache inconsistency between 535 * multiple clients for the file. 536 * There is also a consistency problem for Version 2 of the protocol w.r.t. 537 * not being able to tell if other clients are writing a file concurrently, 538 * since there is no way of knowing if the changed modify time in the reply 539 * is only due to the write for this client. 540 * (NFS Version 3 provides weak cache consistency data in the reply that 541 * should be sufficient to detect and handle this case.) 542 * 543 * The current code does the following: 544 * for NFS Version 2 - play it safe and flush/invalidate all dirty buffers 545 * for NFS Version 3 - flush dirty buffers to the server but don't invalidate 546 * or commit them (this satisfies 1 and 2 except for the 547 * case where the server crashes after this close but 548 * before the commit RPC, which is felt to be "good 549 * enough". Changing the last argument to nfs_flush() to 550 * a 1 would force a commit operation, if it is felt a 551 * commit is necessary now. 552 * for NQNFS - do nothing now, since 2 is dealt with via leases and 553 * 1 should be dealt with via an fsync() system call for 554 * cases where write errors are important. 555 */ 556 /* ARGSUSED */ 557 int 558 nfs_close(v) 559 void *v; 560 { 561 struct vop_close_args /* { 562 struct vnodeop_desc *a_desc; 563 struct vnode *a_vp; 564 int a_fflag; 565 struct ucred *a_cred; 566 struct proc *a_p; 567 } */ *ap = v; 568 struct vnode *vp = ap->a_vp; 569 struct nfsnode *np = VTONFS(vp); 570 int error = 0; 571 UVMHIST_FUNC("nfs_close"); UVMHIST_CALLED(ubchist); 572 573 if (vp->v_type == VREG) { 574 if ((VFSTONFS(vp->v_mount)->nm_flag & NFSMNT_NQNFS) == 0 && 575 (np->n_flag & NMODIFIED)) { 576 if (NFS_ISV3(vp)) { 577 error = nfs_flush(vp, ap->a_cred, MNT_WAIT, ap->a_p, 0); 578 np->n_flag &= ~NMODIFIED; 579 } else 580 error = nfs_vinvalbuf(vp, V_SAVE, ap->a_cred, ap->a_p, 1); 581 np->n_attrstamp = 0; 582 } 583 if (np->n_flag & NWRITEERR) { 584 np->n_flag &= ~NWRITEERR; 585 error = np->n_error; 586 } 587 } 588 UVMHIST_LOG(ubchist, "returning %d", error,0,0,0); 589 return (error); 590 } 591 592 /* 593 * nfs getattr call from vfs. 594 */ 595 int 596 nfs_getattr(v) 597 void *v; 598 { 599 struct vop_getattr_args /* { 600 struct vnode *a_vp; 601 struct vattr *a_vap; 602 struct ucred *a_cred; 603 struct proc *a_p; 604 } */ *ap = v; 605 struct vnode *vp = ap->a_vp; 606 struct nfsnode *np = VTONFS(vp); 607 caddr_t cp; 608 u_int32_t *tl; 609 int32_t t1, t2; 610 caddr_t bpos, dpos; 611 int error = 0; 612 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 613 const int v3 = NFS_ISV3(vp); 614 615 /* 616 * Update local times for special files. 617 */ 618 if (np->n_flag & (NACC | NUPD)) 619 np->n_flag |= NCHG; 620 /* 621 * First look in the cache. 622 */ 623 if (nfs_getattrcache(vp, ap->a_vap) == 0) 624 return (0); 625 nfsstats.rpccnt[NFSPROC_GETATTR]++; 626 nfsm_reqhead(vp, NFSPROC_GETATTR, NFSX_FH(v3)); 627 nfsm_fhtom(vp, v3); 628 nfsm_request(vp, NFSPROC_GETATTR, ap->a_p, ap->a_cred); 629 if (!error) { 630 nfsm_loadattr(vp, ap->a_vap); 631 if (vp->v_type == VDIR && 632 ap->a_vap->va_blocksize < NFS_DIRFRAGSIZ) 633 ap->a_vap->va_blocksize = NFS_DIRFRAGSIZ; 634 } 635 nfsm_reqdone; 636 return (error); 637 } 638 639 /* 640 * nfs setattr call. 641 */ 642 int 643 nfs_setattr(v) 644 void *v; 645 { 646 struct vop_setattr_args /* { 647 struct vnodeop_desc *a_desc; 648 struct vnode *a_vp; 649 struct vattr *a_vap; 650 struct ucred *a_cred; 651 struct proc *a_p; 652 } */ *ap = v; 653 struct vnode *vp = ap->a_vp; 654 struct nfsnode *np = VTONFS(vp); 655 struct vattr *vap = ap->a_vap; 656 int error = 0; 657 u_quad_t tsize = 0; 658 659 /* 660 * Setting of flags is not supported. 661 */ 662 if (vap->va_flags != VNOVAL) 663 return (EOPNOTSUPP); 664 665 /* 666 * Disallow write attempts if the filesystem is mounted read-only. 667 */ 668 if ((vap->va_uid != (uid_t)VNOVAL || 669 vap->va_gid != (gid_t)VNOVAL || vap->va_atime.tv_sec != VNOVAL || 670 vap->va_mtime.tv_sec != VNOVAL || vap->va_mode != (mode_t)VNOVAL) && 671 (vp->v_mount->mnt_flag & MNT_RDONLY)) 672 return (EROFS); 673 if (vap->va_size != VNOVAL) { 674 switch (vp->v_type) { 675 case VDIR: 676 return (EISDIR); 677 case VCHR: 678 case VBLK: 679 case VSOCK: 680 case VFIFO: 681 if (vap->va_mtime.tv_sec == VNOVAL && 682 vap->va_atime.tv_sec == VNOVAL && 683 vap->va_mode == (mode_t)VNOVAL && 684 vap->va_uid == (uid_t)VNOVAL && 685 vap->va_gid == (gid_t)VNOVAL) 686 return (0); 687 vap->va_size = VNOVAL; 688 break; 689 default: 690 /* 691 * Disallow write attempts if the filesystem is 692 * mounted read-only. 693 */ 694 if (vp->v_mount->mnt_flag & MNT_RDONLY) 695 return (EROFS); 696 uvm_vnp_setsize(vp, vap->va_size); 697 if (vap->va_size == 0) 698 error = nfs_vinvalbuf(vp, 0, 699 ap->a_cred, ap->a_p, 1); 700 else 701 error = nfs_vinvalbuf(vp, V_SAVE, 702 ap->a_cred, ap->a_p, 1); 703 if (error) { 704 uvm_vnp_setsize(vp, np->n_size); 705 return (error); 706 } 707 tsize = np->n_size; 708 np->n_size = np->n_vattr->va_size = vap->va_size; 709 } 710 } else if ((vap->va_mtime.tv_sec != VNOVAL || 711 vap->va_atime.tv_sec != VNOVAL) && 712 vp->v_type == VREG && 713 (error = nfs_vinvalbuf(vp, V_SAVE, ap->a_cred, 714 ap->a_p, 1)) == EINTR) 715 return (error); 716 error = nfs_setattrrpc(vp, vap, ap->a_cred, ap->a_p); 717 if (error && vap->va_size != VNOVAL) { 718 np->n_size = np->n_vattr->va_size = tsize; 719 uvm_vnp_setsize(vp, np->n_size); 720 } 721 return (error); 722 } 723 724 /* 725 * Do an nfs setattr rpc. 726 */ 727 int 728 nfs_setattrrpc(vp, vap, cred, procp) 729 struct vnode *vp; 730 struct vattr *vap; 731 struct ucred *cred; 732 struct proc *procp; 733 { 734 struct nfsv2_sattr *sp; 735 caddr_t cp; 736 int32_t t1, t2; 737 caddr_t bpos, dpos, cp2; 738 u_int32_t *tl; 739 int error = 0, wccflag = NFSV3_WCCRATTR; 740 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 741 const int v3 = NFS_ISV3(vp); 742 743 nfsstats.rpccnt[NFSPROC_SETATTR]++; 744 nfsm_reqhead(vp, NFSPROC_SETATTR, NFSX_FH(v3) + NFSX_SATTR(v3)); 745 nfsm_fhtom(vp, v3); 746 if (v3) { 747 nfsm_v3attrbuild(vap, TRUE); 748 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); 749 *tl = nfs_false; 750 } else { 751 nfsm_build(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 752 if (vap->va_mode == (mode_t)VNOVAL) 753 sp->sa_mode = nfs_xdrneg1; 754 else 755 sp->sa_mode = vtonfsv2_mode(vp->v_type, vap->va_mode); 756 if (vap->va_uid == (uid_t)VNOVAL) 757 sp->sa_uid = nfs_xdrneg1; 758 else 759 sp->sa_uid = txdr_unsigned(vap->va_uid); 760 if (vap->va_gid == (gid_t)VNOVAL) 761 sp->sa_gid = nfs_xdrneg1; 762 else 763 sp->sa_gid = txdr_unsigned(vap->va_gid); 764 sp->sa_size = txdr_unsigned(vap->va_size); 765 txdr_nfsv2time(&vap->va_atime, &sp->sa_atime); 766 txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime); 767 } 768 nfsm_request(vp, NFSPROC_SETATTR, procp, cred); 769 if (v3) { 770 nfsm_wcc_data(vp, wccflag); 771 } else 772 nfsm_loadattr(vp, (struct vattr *)0); 773 nfsm_reqdone; 774 return (error); 775 } 776 777 /* 778 * nfs lookup call, one step at a time... 779 * First look in cache 780 * If not found, unlock the directory nfsnode and do the rpc 781 * 782 * This code is full of lock/unlock statements and checks, because 783 * we continue after cache_lookup has finished (we need to check 784 * with the attr cache and do an rpc if it has timed out). This means 785 * that the locking effects of cache_lookup have to be taken into 786 * account. 787 */ 788 int 789 nfs_lookup(v) 790 void *v; 791 { 792 struct vop_lookup_args /* { 793 struct vnodeop_desc *a_desc; 794 struct vnode *a_dvp; 795 struct vnode **a_vpp; 796 struct componentname *a_cnp; 797 } */ *ap = v; 798 struct componentname *cnp = ap->a_cnp; 799 struct vnode *dvp = ap->a_dvp; 800 struct vnode **vpp = ap->a_vpp; 801 int flags; 802 struct vnode *newvp; 803 u_int32_t *tl; 804 caddr_t cp; 805 int32_t t1, t2; 806 struct nfsmount *nmp; 807 caddr_t bpos, dpos, cp2; 808 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 809 long len; 810 nfsfh_t *fhp; 811 struct nfsnode *np; 812 int lockparent, wantparent, error = 0, attrflag, fhsize; 813 const int v3 = NFS_ISV3(dvp); 814 815 cnp->cn_flags &= ~PDIRUNLOCK; 816 flags = cnp->cn_flags; 817 818 *vpp = NULLVP; 819 newvp = NULLVP; 820 if ((flags & ISLASTCN) && (dvp->v_mount->mnt_flag & MNT_RDONLY) && 821 (cnp->cn_nameiop == DELETE || cnp->cn_nameiop == RENAME)) 822 return (EROFS); 823 if (dvp->v_type != VDIR) 824 return (ENOTDIR); 825 826 lockparent = flags & LOCKPARENT; 827 wantparent = flags & (LOCKPARENT|WANTPARENT); 828 nmp = VFSTONFS(dvp->v_mount); 829 np = VTONFS(dvp); 830 831 /* 832 * Before tediously performing a linear scan of the directory, 833 * check the name cache to see if the directory/name pair 834 * we are looking for is known already. 835 * If the directory/name pair is found in the name cache, 836 * we have to ensure the directory has not changed from 837 * the time the cache entry has been created. If it has, 838 * the cache entry has to be ignored 839 */ 840 if ((error = cache_lookup(dvp, vpp, cnp)) >= 0) { 841 struct vattr vattr; 842 int err2; 843 844 if (error && error != ENOENT) { 845 *vpp = NULLVP; 846 return error; 847 } 848 849 if (cnp->cn_flags & PDIRUNLOCK) { 850 err2 = vn_lock(dvp, LK_EXCLUSIVE | LK_RETRY); 851 if (err2 != 0) { 852 *vpp = NULLVP; 853 return err2; 854 } 855 cnp->cn_flags &= ~PDIRUNLOCK; 856 } 857 858 err2 = VOP_ACCESS(dvp, VEXEC, cnp->cn_cred, cnp->cn_proc); 859 if (err2 != 0) { 860 if (error == 0) { 861 if (*vpp != dvp) 862 vput(*vpp); 863 else 864 vrele(*vpp); 865 } 866 *vpp = NULLVP; 867 return err2; 868 } 869 870 if (error == ENOENT) { 871 if (!VOP_GETATTR(dvp, &vattr, cnp->cn_cred, 872 cnp->cn_proc) && vattr.va_mtime.tv_sec == 873 VTONFS(dvp)->n_nctime) 874 return ENOENT; 875 cache_purge(dvp); 876 np->n_nctime = 0; 877 goto dorpc; 878 } 879 880 newvp = *vpp; 881 if (!VOP_GETATTR(newvp, &vattr, cnp->cn_cred, cnp->cn_proc) 882 && vattr.va_ctime.tv_sec == VTONFS(newvp)->n_ctime) 883 { 884 nfsstats.lookupcache_hits++; 885 if (cnp->cn_nameiop != LOOKUP && (flags & ISLASTCN)) 886 cnp->cn_flags |= SAVENAME; 887 if ((!lockparent || !(flags & ISLASTCN)) && 888 newvp != dvp) 889 VOP_UNLOCK(dvp, 0); 890 return (0); 891 } 892 cache_purge(newvp); 893 if (newvp != dvp) 894 vput(newvp); 895 else 896 vrele(newvp); 897 *vpp = NULLVP; 898 } 899 dorpc: 900 error = 0; 901 newvp = NULLVP; 902 nfsstats.lookupcache_misses++; 903 nfsstats.rpccnt[NFSPROC_LOOKUP]++; 904 len = cnp->cn_namelen; 905 nfsm_reqhead(dvp, NFSPROC_LOOKUP, 906 NFSX_FH(v3) + NFSX_UNSIGNED + nfsm_rndup(len)); 907 nfsm_fhtom(dvp, v3); 908 nfsm_strtom(cnp->cn_nameptr, len, NFS_MAXNAMLEN); 909 nfsm_request(dvp, NFSPROC_LOOKUP, cnp->cn_proc, cnp->cn_cred); 910 if (error) { 911 nfsm_postop_attr(dvp, attrflag); 912 m_freem(mrep); 913 goto nfsmout; 914 } 915 nfsm_getfh(fhp, fhsize, v3); 916 917 /* 918 * Handle RENAME case... 919 */ 920 if (cnp->cn_nameiop == RENAME && wantparent && (flags & ISLASTCN)) { 921 if (NFS_CMPFH(np, fhp, fhsize)) { 922 m_freem(mrep); 923 return (EISDIR); 924 } 925 error = nfs_nget(dvp->v_mount, fhp, fhsize, &np); 926 if (error) { 927 m_freem(mrep); 928 return error; 929 } 930 newvp = NFSTOV(np); 931 if (v3) { 932 nfsm_postop_attr(newvp, attrflag); 933 nfsm_postop_attr(dvp, attrflag); 934 } else 935 nfsm_loadattr(newvp, (struct vattr *)0); 936 *vpp = newvp; 937 m_freem(mrep); 938 cnp->cn_flags |= SAVENAME; 939 if (!lockparent) { 940 VOP_UNLOCK(dvp, 0); 941 cnp->cn_flags |= PDIRUNLOCK; 942 } 943 return (0); 944 } 945 946 /* 947 * The postop attr handling is duplicated for each if case, 948 * because it should be done while dvp is locked (unlocking 949 * dvp is different for each case). 950 */ 951 952 if (NFS_CMPFH(np, fhp, fhsize)) { 953 /* 954 * "." lookup 955 */ 956 VREF(dvp); 957 newvp = dvp; 958 if (v3) { 959 nfsm_postop_attr(newvp, attrflag); 960 nfsm_postop_attr(dvp, attrflag); 961 } else 962 nfsm_loadattr(newvp, (struct vattr *)0); 963 } else if (flags & ISDOTDOT) { 964 /* 965 * ".." lookup 966 */ 967 VOP_UNLOCK(dvp, 0); 968 cnp->cn_flags |= PDIRUNLOCK; 969 970 error = nfs_nget(dvp->v_mount, fhp, fhsize, &np); 971 if (error) { 972 if (vn_lock(dvp, LK_EXCLUSIVE | LK_RETRY) == 0) 973 cnp->cn_flags &= ~PDIRUNLOCK; 974 m_freem(mrep); 975 return error; 976 } 977 newvp = NFSTOV(np); 978 979 if (v3) { 980 nfsm_postop_attr(newvp, attrflag); 981 nfsm_postop_attr(dvp, attrflag); 982 } else 983 nfsm_loadattr(newvp, (struct vattr *)0); 984 985 if (lockparent && (flags & ISLASTCN)) { 986 if ((error = vn_lock(dvp, LK_EXCLUSIVE))) { 987 m_freem(mrep); 988 vput(newvp); 989 return error; 990 } 991 cnp->cn_flags &= ~PDIRUNLOCK; 992 } 993 } else { 994 /* 995 * Other lookups. 996 */ 997 error = nfs_nget(dvp->v_mount, fhp, fhsize, &np); 998 if (error) { 999 m_freem(mrep); 1000 return error; 1001 } 1002 newvp = NFSTOV(np); 1003 if (v3) { 1004 nfsm_postop_attr(newvp, attrflag); 1005 nfsm_postop_attr(dvp, attrflag); 1006 } else 1007 nfsm_loadattr(newvp, (struct vattr *)0); 1008 if (!lockparent || !(flags & ISLASTCN)) { 1009 VOP_UNLOCK(dvp, 0); 1010 cnp->cn_flags |= PDIRUNLOCK; 1011 } 1012 } 1013 if (cnp->cn_nameiop != LOOKUP && (flags & ISLASTCN)) 1014 cnp->cn_flags |= SAVENAME; 1015 if ((cnp->cn_flags & MAKEENTRY) && 1016 (cnp->cn_nameiop != DELETE || !(flags & ISLASTCN))) { 1017 np->n_ctime = np->n_vattr->va_ctime.tv_sec; 1018 cache_enter(dvp, newvp, cnp); 1019 } 1020 *vpp = newvp; 1021 nfsm_reqdone; 1022 if (error) { 1023 /* 1024 * We get here only because of errors returned by 1025 * the RPC. Otherwise we'll have returned above 1026 * (the nfsm_* macros will jump to nfsm_reqdone 1027 * on error). 1028 */ 1029 if (error == ENOENT && (cnp->cn_flags & MAKEENTRY) && 1030 cnp->cn_nameiop != CREATE) { 1031 if (VTONFS(dvp)->n_nctime == 0) 1032 VTONFS(dvp)->n_nctime = 1033 VTONFS(dvp)->n_vattr->va_mtime.tv_sec; 1034 cache_enter(dvp, NULL, cnp); 1035 } 1036 if (newvp != NULLVP) { 1037 vrele(newvp); 1038 if (newvp != dvp) 1039 VOP_UNLOCK(newvp, 0); 1040 } 1041 if ((cnp->cn_nameiop == CREATE || cnp->cn_nameiop == RENAME) && 1042 (flags & ISLASTCN) && error == ENOENT) { 1043 if (dvp->v_mount->mnt_flag & MNT_RDONLY) 1044 error = EROFS; 1045 else 1046 error = EJUSTRETURN; 1047 } 1048 if (cnp->cn_nameiop != LOOKUP && (flags & ISLASTCN)) 1049 cnp->cn_flags |= SAVENAME; 1050 *vpp = NULL; 1051 } 1052 1053 return error; 1054 } 1055 1056 /* 1057 * nfs read call. 1058 * Just call nfs_bioread() to do the work. 1059 */ 1060 int 1061 nfs_read(v) 1062 void *v; 1063 { 1064 struct vop_read_args /* { 1065 struct vnode *a_vp; 1066 struct uio *a_uio; 1067 int a_ioflag; 1068 struct ucred *a_cred; 1069 } */ *ap = v; 1070 struct vnode *vp = ap->a_vp; 1071 1072 if (vp->v_type != VREG) 1073 return (EPERM); 1074 return (nfs_bioread(vp, ap->a_uio, ap->a_ioflag, ap->a_cred, 0)); 1075 } 1076 1077 /* 1078 * nfs readlink call 1079 */ 1080 int 1081 nfs_readlink(v) 1082 void *v; 1083 { 1084 struct vop_readlink_args /* { 1085 struct vnode *a_vp; 1086 struct uio *a_uio; 1087 struct ucred *a_cred; 1088 } */ *ap = v; 1089 struct vnode *vp = ap->a_vp; 1090 1091 if (vp->v_type != VLNK) 1092 return (EPERM); 1093 return (nfs_bioread(vp, ap->a_uio, 0, ap->a_cred, 0)); 1094 } 1095 1096 /* 1097 * Do a readlink rpc. 1098 * Called by nfs_doio() from below the buffer cache. 1099 */ 1100 int 1101 nfs_readlinkrpc(vp, uiop, cred) 1102 struct vnode *vp; 1103 struct uio *uiop; 1104 struct ucred *cred; 1105 { 1106 u_int32_t *tl; 1107 caddr_t cp; 1108 int32_t t1, t2; 1109 caddr_t bpos, dpos, cp2; 1110 int error = 0, len, attrflag; 1111 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 1112 const int v3 = NFS_ISV3(vp); 1113 1114 nfsstats.rpccnt[NFSPROC_READLINK]++; 1115 nfsm_reqhead(vp, NFSPROC_READLINK, NFSX_FH(v3)); 1116 nfsm_fhtom(vp, v3); 1117 nfsm_request(vp, NFSPROC_READLINK, uiop->uio_procp, cred); 1118 if (v3) 1119 nfsm_postop_attr(vp, attrflag); 1120 if (!error) { 1121 nfsm_strsiz(len, NFS_MAXPATHLEN); 1122 nfsm_mtouio(uiop, len); 1123 } 1124 nfsm_reqdone; 1125 return (error); 1126 } 1127 1128 /* 1129 * nfs read rpc call 1130 * Ditto above 1131 */ 1132 int 1133 nfs_readrpc(vp, uiop) 1134 struct vnode *vp; 1135 struct uio *uiop; 1136 { 1137 u_int32_t *tl; 1138 caddr_t cp; 1139 int32_t t1, t2; 1140 caddr_t bpos, dpos, cp2; 1141 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 1142 struct nfsmount *nmp; 1143 int error = 0, len, retlen, tsiz, eof, attrflag; 1144 const int v3 = NFS_ISV3(vp); 1145 1146 #ifndef nolint 1147 eof = 0; 1148 #endif 1149 nmp = VFSTONFS(vp->v_mount); 1150 tsiz = uiop->uio_resid; 1151 if (uiop->uio_offset + tsiz > nmp->nm_maxfilesize) 1152 return (EFBIG); 1153 while (tsiz > 0) { 1154 nfsstats.rpccnt[NFSPROC_READ]++; 1155 len = (tsiz > nmp->nm_rsize) ? nmp->nm_rsize : tsiz; 1156 nfsm_reqhead(vp, NFSPROC_READ, NFSX_FH(v3) + NFSX_UNSIGNED * 3); 1157 nfsm_fhtom(vp, v3); 1158 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED * 3); 1159 if (v3) { 1160 txdr_hyper(uiop->uio_offset, tl); 1161 *(tl + 2) = txdr_unsigned(len); 1162 } else { 1163 *tl++ = txdr_unsigned(uiop->uio_offset); 1164 *tl++ = txdr_unsigned(len); 1165 *tl = 0; 1166 } 1167 nfsm_request(vp, NFSPROC_READ, uiop->uio_procp, 1168 VTONFS(vp)->n_rcred); 1169 if (v3) { 1170 nfsm_postop_attr(vp, attrflag); 1171 if (error) { 1172 m_freem(mrep); 1173 goto nfsmout; 1174 } 1175 nfsm_dissect(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 1176 eof = fxdr_unsigned(int, *(tl + 1)); 1177 } else 1178 nfsm_loadattr(vp, (struct vattr *)0); 1179 nfsm_strsiz(retlen, nmp->nm_rsize); 1180 nfsm_mtouio(uiop, retlen); 1181 m_freem(mrep); 1182 tsiz -= retlen; 1183 if (v3) { 1184 if (eof || retlen == 0) 1185 tsiz = 0; 1186 } else if (retlen < len) 1187 tsiz = 0; 1188 } 1189 nfsmout: 1190 return (error); 1191 } 1192 1193 /* 1194 * nfs write call 1195 */ 1196 int 1197 nfs_writerpc(vp, uiop, iomode, must_commit) 1198 struct vnode *vp; 1199 struct uio *uiop; 1200 int *iomode, *must_commit; 1201 { 1202 u_int32_t *tl; 1203 caddr_t cp; 1204 int32_t t1, t2, backup; 1205 caddr_t bpos, dpos, cp2; 1206 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 1207 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 1208 int error = 0, len, tsiz, wccflag = NFSV3_WCCRATTR, rlen, commit; 1209 const int v3 = NFS_ISV3(vp); 1210 int committed = NFSV3WRITE_FILESYNC; 1211 1212 if (vp->v_mount->mnt_flag & MNT_RDONLY) { 1213 panic("writerpc readonly vp %p", vp); 1214 } 1215 1216 #ifdef DIAGNOSTIC 1217 if (uiop->uio_iovcnt != 1) 1218 panic("nfs: writerpc iovcnt > 1"); 1219 #endif 1220 *must_commit = 0; 1221 tsiz = uiop->uio_resid; 1222 if (uiop->uio_offset + tsiz > nmp->nm_maxfilesize) 1223 return (EFBIG); 1224 while (tsiz > 0) { 1225 nfsstats.rpccnt[NFSPROC_WRITE]++; 1226 len = min(tsiz, nmp->nm_wsize); 1227 nfsm_reqhead(vp, NFSPROC_WRITE, 1228 NFSX_FH(v3) + 5 * NFSX_UNSIGNED + nfsm_rndup(len)); 1229 nfsm_fhtom(vp, v3); 1230 if (v3) { 1231 nfsm_build(tl, u_int32_t *, 5 * NFSX_UNSIGNED); 1232 txdr_hyper(uiop->uio_offset, tl); 1233 tl += 2; 1234 *tl++ = txdr_unsigned(len); 1235 *tl++ = txdr_unsigned(*iomode); 1236 *tl = txdr_unsigned(len); 1237 } else { 1238 u_int32_t x; 1239 1240 nfsm_build(tl, u_int32_t *, 4 * NFSX_UNSIGNED); 1241 /* Set both "begin" and "current" to non-garbage. */ 1242 x = txdr_unsigned((u_int32_t)uiop->uio_offset); 1243 *tl++ = x; /* "begin offset" */ 1244 *tl++ = x; /* "current offset" */ 1245 x = txdr_unsigned(len); 1246 *tl++ = x; /* total to this offset */ 1247 *tl = x; /* size of this write */ 1248 1249 } 1250 nfsm_uiotom(uiop, len); 1251 nfsm_request(vp, NFSPROC_WRITE, uiop->uio_procp, 1252 VTONFS(vp)->n_wcred); 1253 if (v3) { 1254 wccflag = NFSV3_WCCCHK; 1255 nfsm_wcc_data(vp, wccflag); 1256 if (!error) { 1257 nfsm_dissect(tl, u_int32_t *, 2 * NFSX_UNSIGNED 1258 + NFSX_V3WRITEVERF); 1259 rlen = fxdr_unsigned(int, *tl++); 1260 if (rlen == 0) { 1261 error = NFSERR_IO; 1262 m_freem(mrep); 1263 break; 1264 } else if (rlen < len) { 1265 backup = len - rlen; 1266 uiop->uio_iov->iov_base = 1267 (caddr_t)uiop->uio_iov->iov_base - 1268 backup; 1269 uiop->uio_iov->iov_len += backup; 1270 uiop->uio_offset -= backup; 1271 uiop->uio_resid += backup; 1272 len = rlen; 1273 } 1274 commit = fxdr_unsigned(int, *tl++); 1275 1276 /* 1277 * Return the lowest committment level 1278 * obtained by any of the RPCs. 1279 */ 1280 if (committed == NFSV3WRITE_FILESYNC) 1281 committed = commit; 1282 else if (committed == NFSV3WRITE_DATASYNC && 1283 commit == NFSV3WRITE_UNSTABLE) 1284 committed = commit; 1285 if ((nmp->nm_iflag & NFSMNT_HASWRITEVERF) == 0){ 1286 memcpy((caddr_t)nmp->nm_verf, (caddr_t)tl, 1287 NFSX_V3WRITEVERF); 1288 nmp->nm_iflag |= NFSMNT_HASWRITEVERF; 1289 } else if (memcmp((caddr_t)tl, 1290 (caddr_t)nmp->nm_verf, NFSX_V3WRITEVERF)) { 1291 *must_commit = 1; 1292 memcpy((caddr_t)nmp->nm_verf, (caddr_t)tl, 1293 NFSX_V3WRITEVERF); 1294 } 1295 } 1296 } else 1297 nfsm_loadattr(vp, (struct vattr *)0); 1298 if (wccflag) 1299 VTONFS(vp)->n_mtime = VTONFS(vp)->n_vattr->va_mtime.tv_sec; 1300 m_freem(mrep); 1301 if (error) 1302 break; 1303 tsiz -= len; 1304 } 1305 nfsmout: 1306 *iomode = committed; 1307 if (error) 1308 uiop->uio_resid = tsiz; 1309 return (error); 1310 } 1311 1312 /* 1313 * nfs mknod rpc 1314 * For NFS v2 this is a kludge. Use a create rpc but with the IFMT bits of the 1315 * mode set to specify the file type and the size field for rdev. 1316 */ 1317 int 1318 nfs_mknodrpc(dvp, vpp, cnp, vap) 1319 struct vnode *dvp; 1320 struct vnode **vpp; 1321 struct componentname *cnp; 1322 struct vattr *vap; 1323 { 1324 struct nfsv2_sattr *sp; 1325 u_int32_t *tl; 1326 caddr_t cp; 1327 int32_t t1, t2; 1328 struct vnode *newvp = (struct vnode *)0; 1329 struct nfsnode *np; 1330 char *cp2; 1331 caddr_t bpos, dpos; 1332 int error = 0, wccflag = NFSV3_WCCRATTR, gotvp = 0; 1333 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 1334 u_int32_t rdev; 1335 const int v3 = NFS_ISV3(dvp); 1336 1337 if (vap->va_type == VCHR || vap->va_type == VBLK) 1338 rdev = txdr_unsigned(vap->va_rdev); 1339 else if (vap->va_type == VFIFO || vap->va_type == VSOCK) 1340 rdev = nfs_xdrneg1; 1341 else { 1342 VOP_ABORTOP(dvp, cnp); 1343 vput(dvp); 1344 return (EOPNOTSUPP); 1345 } 1346 nfsstats.rpccnt[NFSPROC_MKNOD]++; 1347 nfsm_reqhead(dvp, NFSPROC_MKNOD, NFSX_FH(v3) + 4 * NFSX_UNSIGNED + 1348 + nfsm_rndup(cnp->cn_namelen) + NFSX_SATTR(v3)); 1349 nfsm_fhtom(dvp, v3); 1350 nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN); 1351 if (v3) { 1352 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); 1353 *tl++ = vtonfsv3_type(vap->va_type); 1354 nfsm_v3attrbuild(vap, FALSE); 1355 if (vap->va_type == VCHR || vap->va_type == VBLK) { 1356 nfsm_build(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 1357 *tl++ = txdr_unsigned(major(vap->va_rdev)); 1358 *tl = txdr_unsigned(minor(vap->va_rdev)); 1359 } 1360 } else { 1361 nfsm_build(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 1362 sp->sa_mode = vtonfsv2_mode(vap->va_type, vap->va_mode); 1363 sp->sa_uid = nfs_xdrneg1; 1364 sp->sa_gid = nfs_xdrneg1; 1365 sp->sa_size = rdev; 1366 txdr_nfsv2time(&vap->va_atime, &sp->sa_atime); 1367 txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime); 1368 } 1369 nfsm_request(dvp, NFSPROC_MKNOD, cnp->cn_proc, cnp->cn_cred); 1370 if (!error) { 1371 nfsm_mtofh(dvp, newvp, v3, gotvp); 1372 if (!gotvp) { 1373 error = nfs_lookitup(dvp, cnp->cn_nameptr, 1374 cnp->cn_namelen, cnp->cn_cred, cnp->cn_proc, &np); 1375 if (!error) 1376 newvp = NFSTOV(np); 1377 } 1378 } 1379 if (v3) 1380 nfsm_wcc_data(dvp, wccflag); 1381 nfsm_reqdone; 1382 if (error) { 1383 if (newvp) 1384 vput(newvp); 1385 } else { 1386 if (cnp->cn_flags & MAKEENTRY) 1387 cache_enter(dvp, newvp, cnp); 1388 *vpp = newvp; 1389 } 1390 PNBUF_PUT(cnp->cn_pnbuf); 1391 VTONFS(dvp)->n_flag |= NMODIFIED; 1392 if (!wccflag) 1393 VTONFS(dvp)->n_attrstamp = 0; 1394 vput(dvp); 1395 return (error); 1396 } 1397 1398 /* 1399 * nfs mknod vop 1400 * just call nfs_mknodrpc() to do the work. 1401 */ 1402 /* ARGSUSED */ 1403 int 1404 nfs_mknod(v) 1405 void *v; 1406 { 1407 struct vop_mknod_args /* { 1408 struct vnode *a_dvp; 1409 struct vnode **a_vpp; 1410 struct componentname *a_cnp; 1411 struct vattr *a_vap; 1412 } */ *ap = v; 1413 int error; 1414 1415 error = nfs_mknodrpc(ap->a_dvp, ap->a_vpp, ap->a_cnp, ap->a_vap); 1416 return (error); 1417 } 1418 1419 static u_long create_verf; 1420 /* 1421 * nfs file create call 1422 */ 1423 int 1424 nfs_create(v) 1425 void *v; 1426 { 1427 struct vop_create_args /* { 1428 struct vnode *a_dvp; 1429 struct vnode **a_vpp; 1430 struct componentname *a_cnp; 1431 struct vattr *a_vap; 1432 } */ *ap = v; 1433 struct vnode *dvp = ap->a_dvp; 1434 struct vattr *vap = ap->a_vap; 1435 struct componentname *cnp = ap->a_cnp; 1436 struct nfsv2_sattr *sp; 1437 u_int32_t *tl; 1438 caddr_t cp; 1439 int32_t t1, t2; 1440 struct nfsnode *np = (struct nfsnode *)0; 1441 struct vnode *newvp = (struct vnode *)0; 1442 caddr_t bpos, dpos, cp2; 1443 int error, wccflag = NFSV3_WCCRATTR, gotvp = 0, fmode = 0; 1444 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 1445 const int v3 = NFS_ISV3(dvp); 1446 1447 /* 1448 * Oops, not for me.. 1449 */ 1450 if (vap->va_type == VSOCK) 1451 return (nfs_mknodrpc(dvp, ap->a_vpp, cnp, vap)); 1452 1453 #ifdef VA_EXCLUSIVE 1454 if (vap->va_vaflags & VA_EXCLUSIVE) 1455 fmode |= O_EXCL; 1456 #endif 1457 again: 1458 error = 0; 1459 nfsstats.rpccnt[NFSPROC_CREATE]++; 1460 nfsm_reqhead(dvp, NFSPROC_CREATE, NFSX_FH(v3) + 2 * NFSX_UNSIGNED + 1461 nfsm_rndup(cnp->cn_namelen) + NFSX_SATTR(v3)); 1462 nfsm_fhtom(dvp, v3); 1463 nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN); 1464 if (v3) { 1465 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); 1466 if (fmode & O_EXCL) { 1467 *tl = txdr_unsigned(NFSV3CREATE_EXCLUSIVE); 1468 nfsm_build(tl, u_int32_t *, NFSX_V3CREATEVERF); 1469 #ifdef INET 1470 if (in_ifaddr.tqh_first) 1471 *tl++ = in_ifaddr.tqh_first->ia_addr.sin_addr.s_addr; 1472 else 1473 *tl++ = create_verf; 1474 #else 1475 *tl++ = create_verf; 1476 #endif 1477 *tl = ++create_verf; 1478 } else { 1479 *tl = txdr_unsigned(NFSV3CREATE_UNCHECKED); 1480 nfsm_v3attrbuild(vap, FALSE); 1481 } 1482 } else { 1483 nfsm_build(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 1484 sp->sa_mode = vtonfsv2_mode(vap->va_type, vap->va_mode); 1485 sp->sa_uid = nfs_xdrneg1; 1486 sp->sa_gid = nfs_xdrneg1; 1487 sp->sa_size = 0; 1488 txdr_nfsv2time(&vap->va_atime, &sp->sa_atime); 1489 txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime); 1490 } 1491 nfsm_request(dvp, NFSPROC_CREATE, cnp->cn_proc, cnp->cn_cred); 1492 if (!error) { 1493 nfsm_mtofh(dvp, newvp, v3, gotvp); 1494 if (!gotvp) { 1495 error = nfs_lookitup(dvp, cnp->cn_nameptr, 1496 cnp->cn_namelen, cnp->cn_cred, cnp->cn_proc, &np); 1497 if (!error) 1498 newvp = NFSTOV(np); 1499 } 1500 } 1501 if (v3) 1502 nfsm_wcc_data(dvp, wccflag); 1503 nfsm_reqdone; 1504 if (error) { 1505 if (v3 && (fmode & O_EXCL) && error == NFSERR_NOTSUPP) { 1506 fmode &= ~O_EXCL; 1507 goto again; 1508 } 1509 if (newvp) 1510 vput(newvp); 1511 } else if (v3 && (fmode & O_EXCL)) 1512 error = nfs_setattrrpc(newvp, vap, cnp->cn_cred, cnp->cn_proc); 1513 if (!error) { 1514 if (cnp->cn_flags & MAKEENTRY) 1515 cache_enter(dvp, newvp, cnp); 1516 *ap->a_vpp = newvp; 1517 } 1518 PNBUF_PUT(cnp->cn_pnbuf); 1519 VTONFS(dvp)->n_flag |= NMODIFIED; 1520 if (!wccflag) 1521 VTONFS(dvp)->n_attrstamp = 0; 1522 vput(dvp); 1523 return (error); 1524 } 1525 1526 /* 1527 * nfs file remove call 1528 * To try and make nfs semantics closer to ufs semantics, a file that has 1529 * other processes using the vnode is renamed instead of removed and then 1530 * removed later on the last close. 1531 * - If v_usecount > 1 1532 * If a rename is not already in the works 1533 * call nfs_sillyrename() to set it up 1534 * else 1535 * do the remove rpc 1536 */ 1537 int 1538 nfs_remove(v) 1539 void *v; 1540 { 1541 struct vop_remove_args /* { 1542 struct vnodeop_desc *a_desc; 1543 struct vnode * a_dvp; 1544 struct vnode * a_vp; 1545 struct componentname * a_cnp; 1546 } */ *ap = v; 1547 struct vnode *vp = ap->a_vp; 1548 struct vnode *dvp = ap->a_dvp; 1549 struct componentname *cnp = ap->a_cnp; 1550 struct nfsnode *np = VTONFS(vp); 1551 int error = 0; 1552 struct vattr vattr; 1553 1554 #ifndef DIAGNOSTIC 1555 if ((cnp->cn_flags & HASBUF) == 0) 1556 panic("nfs_remove: no name"); 1557 if (vp->v_usecount < 1) 1558 panic("nfs_remove: bad v_usecount"); 1559 #endif 1560 if (vp->v_type == VDIR) 1561 error = EPERM; 1562 else if (vp->v_usecount == 1 || (np->n_sillyrename && 1563 VOP_GETATTR(vp, &vattr, cnp->cn_cred, cnp->cn_proc) == 0 && 1564 vattr.va_nlink > 1)) { 1565 /* 1566 * Purge the name cache so that the chance of a lookup for 1567 * the name succeeding while the remove is in progress is 1568 * minimized. Without node locking it can still happen, such 1569 * that an I/O op returns ESTALE, but since you get this if 1570 * another host removes the file.. 1571 */ 1572 cache_purge(vp); 1573 /* 1574 * throw away biocache buffers, mainly to avoid 1575 * unnecessary delayed writes later. 1576 */ 1577 error = nfs_vinvalbuf(vp, 0, cnp->cn_cred, cnp->cn_proc, 1); 1578 /* Do the rpc */ 1579 if (error != EINTR) 1580 error = nfs_removerpc(dvp, cnp->cn_nameptr, 1581 cnp->cn_namelen, cnp->cn_cred, cnp->cn_proc); 1582 /* 1583 * Kludge City: If the first reply to the remove rpc is lost.. 1584 * the reply to the retransmitted request will be ENOENT 1585 * since the file was in fact removed 1586 * Therefore, we cheat and return success. 1587 */ 1588 if (error == ENOENT) 1589 error = 0; 1590 } else if (!np->n_sillyrename) 1591 error = nfs_sillyrename(dvp, vp, cnp); 1592 PNBUF_PUT(cnp->cn_pnbuf); 1593 np->n_attrstamp = 0; 1594 vput(dvp); 1595 vput(vp); 1596 return (error); 1597 } 1598 1599 /* 1600 * nfs file remove rpc called from nfs_inactive 1601 */ 1602 int 1603 nfs_removeit(sp) 1604 struct sillyrename *sp; 1605 { 1606 1607 return (nfs_removerpc(sp->s_dvp, sp->s_name, sp->s_namlen, sp->s_cred, 1608 (struct proc *)0)); 1609 } 1610 1611 /* 1612 * Nfs remove rpc, called from nfs_remove() and nfs_removeit(). 1613 */ 1614 int 1615 nfs_removerpc(dvp, name, namelen, cred, proc) 1616 struct vnode *dvp; 1617 const char *name; 1618 int namelen; 1619 struct ucred *cred; 1620 struct proc *proc; 1621 { 1622 u_int32_t *tl; 1623 caddr_t cp; 1624 int32_t t1, t2; 1625 caddr_t bpos, dpos, cp2; 1626 int error = 0, wccflag = NFSV3_WCCRATTR; 1627 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 1628 const int v3 = NFS_ISV3(dvp); 1629 1630 nfsstats.rpccnt[NFSPROC_REMOVE]++; 1631 nfsm_reqhead(dvp, NFSPROC_REMOVE, 1632 NFSX_FH(v3) + NFSX_UNSIGNED + nfsm_rndup(namelen)); 1633 nfsm_fhtom(dvp, v3); 1634 nfsm_strtom(name, namelen, NFS_MAXNAMLEN); 1635 nfsm_request(dvp, NFSPROC_REMOVE, proc, cred); 1636 if (v3) 1637 nfsm_wcc_data(dvp, wccflag); 1638 nfsm_reqdone; 1639 VTONFS(dvp)->n_flag |= NMODIFIED; 1640 if (!wccflag) 1641 VTONFS(dvp)->n_attrstamp = 0; 1642 return (error); 1643 } 1644 1645 /* 1646 * nfs file rename call 1647 */ 1648 int 1649 nfs_rename(v) 1650 void *v; 1651 { 1652 struct vop_rename_args /* { 1653 struct vnode *a_fdvp; 1654 struct vnode *a_fvp; 1655 struct componentname *a_fcnp; 1656 struct vnode *a_tdvp; 1657 struct vnode *a_tvp; 1658 struct componentname *a_tcnp; 1659 } */ *ap = v; 1660 struct vnode *fvp = ap->a_fvp; 1661 struct vnode *tvp = ap->a_tvp; 1662 struct vnode *fdvp = ap->a_fdvp; 1663 struct vnode *tdvp = ap->a_tdvp; 1664 struct componentname *tcnp = ap->a_tcnp; 1665 struct componentname *fcnp = ap->a_fcnp; 1666 int error; 1667 1668 #ifndef DIAGNOSTIC 1669 if ((tcnp->cn_flags & HASBUF) == 0 || 1670 (fcnp->cn_flags & HASBUF) == 0) 1671 panic("nfs_rename: no name"); 1672 #endif 1673 /* Check for cross-device rename */ 1674 if ((fvp->v_mount != tdvp->v_mount) || 1675 (tvp && (fvp->v_mount != tvp->v_mount))) { 1676 error = EXDEV; 1677 goto out; 1678 } 1679 1680 /* 1681 * If the tvp exists and is in use, sillyrename it before doing the 1682 * rename of the new file over it. 1683 */ 1684 if (tvp && tvp->v_usecount > 1 && !VTONFS(tvp)->n_sillyrename && 1685 tvp->v_type != VDIR && !nfs_sillyrename(tdvp, tvp, tcnp)) { 1686 vput(tvp); 1687 tvp = NULL; 1688 } 1689 1690 error = nfs_renamerpc(fdvp, fcnp->cn_nameptr, fcnp->cn_namelen, 1691 tdvp, tcnp->cn_nameptr, tcnp->cn_namelen, tcnp->cn_cred, 1692 tcnp->cn_proc); 1693 1694 if (fvp->v_type == VDIR) { 1695 if (tvp != NULL && tvp->v_type == VDIR) 1696 cache_purge(tdvp); 1697 cache_purge(fdvp); 1698 } 1699 out: 1700 if (tdvp == tvp) 1701 vrele(tdvp); 1702 else 1703 vput(tdvp); 1704 if (tvp) 1705 vput(tvp); 1706 vrele(fdvp); 1707 vrele(fvp); 1708 /* 1709 * Kludge: Map ENOENT => 0 assuming that it is a reply to a retry. 1710 */ 1711 if (error == ENOENT) 1712 error = 0; 1713 return (error); 1714 } 1715 1716 /* 1717 * nfs file rename rpc called from nfs_remove() above 1718 */ 1719 int 1720 nfs_renameit(sdvp, scnp, sp) 1721 struct vnode *sdvp; 1722 struct componentname *scnp; 1723 struct sillyrename *sp; 1724 { 1725 return (nfs_renamerpc(sdvp, scnp->cn_nameptr, scnp->cn_namelen, 1726 sdvp, sp->s_name, sp->s_namlen, scnp->cn_cred, scnp->cn_proc)); 1727 } 1728 1729 /* 1730 * Do an nfs rename rpc. Called from nfs_rename() and nfs_renameit(). 1731 */ 1732 int 1733 nfs_renamerpc(fdvp, fnameptr, fnamelen, tdvp, tnameptr, tnamelen, cred, proc) 1734 struct vnode *fdvp; 1735 const char *fnameptr; 1736 int fnamelen; 1737 struct vnode *tdvp; 1738 const char *tnameptr; 1739 int tnamelen; 1740 struct ucred *cred; 1741 struct proc *proc; 1742 { 1743 u_int32_t *tl; 1744 caddr_t cp; 1745 int32_t t1, t2; 1746 caddr_t bpos, dpos, cp2; 1747 int error = 0, fwccflag = NFSV3_WCCRATTR, twccflag = NFSV3_WCCRATTR; 1748 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 1749 const int v3 = NFS_ISV3(fdvp); 1750 1751 nfsstats.rpccnt[NFSPROC_RENAME]++; 1752 nfsm_reqhead(fdvp, NFSPROC_RENAME, 1753 (NFSX_FH(v3) + NFSX_UNSIGNED)*2 + nfsm_rndup(fnamelen) + 1754 nfsm_rndup(tnamelen)); 1755 nfsm_fhtom(fdvp, v3); 1756 nfsm_strtom(fnameptr, fnamelen, NFS_MAXNAMLEN); 1757 nfsm_fhtom(tdvp, v3); 1758 nfsm_strtom(tnameptr, tnamelen, NFS_MAXNAMLEN); 1759 nfsm_request(fdvp, NFSPROC_RENAME, proc, cred); 1760 if (v3) { 1761 nfsm_wcc_data(fdvp, fwccflag); 1762 nfsm_wcc_data(tdvp, twccflag); 1763 } 1764 nfsm_reqdone; 1765 VTONFS(fdvp)->n_flag |= NMODIFIED; 1766 VTONFS(tdvp)->n_flag |= NMODIFIED; 1767 if (!fwccflag) 1768 VTONFS(fdvp)->n_attrstamp = 0; 1769 if (!twccflag) 1770 VTONFS(tdvp)->n_attrstamp = 0; 1771 return (error); 1772 } 1773 1774 /* 1775 * nfs hard link create call 1776 */ 1777 int 1778 nfs_link(v) 1779 void *v; 1780 { 1781 struct vop_link_args /* { 1782 struct vnode *a_dvp; 1783 struct vnode *a_vp; 1784 struct componentname *a_cnp; 1785 } */ *ap = v; 1786 struct vnode *vp = ap->a_vp; 1787 struct vnode *dvp = ap->a_dvp; 1788 struct componentname *cnp = ap->a_cnp; 1789 u_int32_t *tl; 1790 caddr_t cp; 1791 int32_t t1, t2; 1792 caddr_t bpos, dpos, cp2; 1793 int error = 0, wccflag = NFSV3_WCCRATTR, attrflag = 0; 1794 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 1795 /* XXX Should be const and initialised? */ 1796 int v3; 1797 1798 if (dvp->v_mount != vp->v_mount) { 1799 VOP_ABORTOP(dvp, cnp); 1800 vput(dvp); 1801 return (EXDEV); 1802 } 1803 if (dvp != vp) { 1804 error = vn_lock(vp, LK_EXCLUSIVE); 1805 if (error != 0) { 1806 VOP_ABORTOP(dvp, cnp); 1807 vput(dvp); 1808 return error; 1809 } 1810 } 1811 1812 /* 1813 * Push all writes to the server, so that the attribute cache 1814 * doesn't get "out of sync" with the server. 1815 * XXX There should be a better way! 1816 */ 1817 VOP_FSYNC(vp, cnp->cn_cred, FSYNC_WAIT, 0, 0, cnp->cn_proc); 1818 1819 v3 = NFS_ISV3(vp); 1820 nfsstats.rpccnt[NFSPROC_LINK]++; 1821 nfsm_reqhead(vp, NFSPROC_LINK, 1822 NFSX_FH(v3)*2 + NFSX_UNSIGNED + nfsm_rndup(cnp->cn_namelen)); 1823 nfsm_fhtom(vp, v3); 1824 nfsm_fhtom(dvp, v3); 1825 nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN); 1826 nfsm_request(vp, NFSPROC_LINK, cnp->cn_proc, cnp->cn_cred); 1827 if (v3) { 1828 nfsm_postop_attr(vp, attrflag); 1829 nfsm_wcc_data(dvp, wccflag); 1830 } 1831 nfsm_reqdone; 1832 PNBUF_PUT(cnp->cn_pnbuf); 1833 VTONFS(dvp)->n_flag |= NMODIFIED; 1834 if (!attrflag) 1835 VTONFS(vp)->n_attrstamp = 0; 1836 if (!wccflag) 1837 VTONFS(dvp)->n_attrstamp = 0; 1838 if (dvp != vp) 1839 VOP_UNLOCK(vp, 0); 1840 vput(dvp); 1841 /* 1842 * Kludge: Map EEXIST => 0 assuming that it is a reply to a retry. 1843 */ 1844 if (error == EEXIST) 1845 error = 0; 1846 return (error); 1847 } 1848 1849 /* 1850 * nfs symbolic link create call 1851 */ 1852 int 1853 nfs_symlink(v) 1854 void *v; 1855 { 1856 struct vop_symlink_args /* { 1857 struct vnode *a_dvp; 1858 struct vnode **a_vpp; 1859 struct componentname *a_cnp; 1860 struct vattr *a_vap; 1861 char *a_target; 1862 } */ *ap = v; 1863 struct vnode *dvp = ap->a_dvp; 1864 struct vattr *vap = ap->a_vap; 1865 struct componentname *cnp = ap->a_cnp; 1866 struct nfsv2_sattr *sp; 1867 u_int32_t *tl; 1868 caddr_t cp; 1869 int32_t t1, t2; 1870 caddr_t bpos, dpos, cp2; 1871 int slen, error = 0, wccflag = NFSV3_WCCRATTR, gotvp; 1872 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 1873 struct vnode *newvp = (struct vnode *)0; 1874 const int v3 = NFS_ISV3(dvp); 1875 1876 *ap->a_vpp = NULL; 1877 nfsstats.rpccnt[NFSPROC_SYMLINK]++; 1878 slen = strlen(ap->a_target); 1879 nfsm_reqhead(dvp, NFSPROC_SYMLINK, NFSX_FH(v3) + 2*NFSX_UNSIGNED + 1880 nfsm_rndup(cnp->cn_namelen) + nfsm_rndup(slen) + NFSX_SATTR(v3)); 1881 nfsm_fhtom(dvp, v3); 1882 nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN); 1883 if (v3) 1884 nfsm_v3attrbuild(vap, FALSE); 1885 nfsm_strtom(ap->a_target, slen, NFS_MAXPATHLEN); 1886 if (!v3) { 1887 nfsm_build(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 1888 sp->sa_mode = vtonfsv2_mode(VLNK, vap->va_mode); 1889 sp->sa_uid = nfs_xdrneg1; 1890 sp->sa_gid = nfs_xdrneg1; 1891 sp->sa_size = nfs_xdrneg1; 1892 txdr_nfsv2time(&vap->va_atime, &sp->sa_atime); 1893 txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime); 1894 } 1895 nfsm_request(dvp, NFSPROC_SYMLINK, cnp->cn_proc, cnp->cn_cred); 1896 if (v3) { 1897 if (!error) 1898 nfsm_mtofh(dvp, newvp, v3, gotvp); 1899 nfsm_wcc_data(dvp, wccflag); 1900 } 1901 nfsm_reqdone; 1902 /* 1903 * Kludge: Map EEXIST => 0 assuming that it is a reply to a retry. 1904 */ 1905 if (error == EEXIST) 1906 error = 0; 1907 if (error == 0 && newvp == NULL) { 1908 struct nfsnode *np = NULL; 1909 1910 error = nfs_lookitup(dvp, cnp->cn_nameptr, cnp->cn_namelen, 1911 cnp->cn_cred, cnp->cn_proc, &np); 1912 if (error == 0) 1913 newvp = NFSTOV(np); 1914 } 1915 if (error) { 1916 if (newvp != NULL) 1917 vput(newvp); 1918 } else { 1919 *ap->a_vpp = newvp; 1920 } 1921 PNBUF_PUT(cnp->cn_pnbuf); 1922 VTONFS(dvp)->n_flag |= NMODIFIED; 1923 if (!wccflag) 1924 VTONFS(dvp)->n_attrstamp = 0; 1925 vput(dvp); 1926 return (error); 1927 } 1928 1929 /* 1930 * nfs make dir call 1931 */ 1932 int 1933 nfs_mkdir(v) 1934 void *v; 1935 { 1936 struct vop_mkdir_args /* { 1937 struct vnode *a_dvp; 1938 struct vnode **a_vpp; 1939 struct componentname *a_cnp; 1940 struct vattr *a_vap; 1941 } */ *ap = v; 1942 struct vnode *dvp = ap->a_dvp; 1943 struct vattr *vap = ap->a_vap; 1944 struct componentname *cnp = ap->a_cnp; 1945 struct nfsv2_sattr *sp; 1946 u_int32_t *tl; 1947 caddr_t cp; 1948 int32_t t1, t2; 1949 int len; 1950 struct nfsnode *np = (struct nfsnode *)0; 1951 struct vnode *newvp = (struct vnode *)0; 1952 caddr_t bpos, dpos, cp2; 1953 int error = 0, wccflag = NFSV3_WCCRATTR; 1954 int gotvp = 0; 1955 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 1956 const int v3 = NFS_ISV3(dvp); 1957 1958 len = cnp->cn_namelen; 1959 nfsstats.rpccnt[NFSPROC_MKDIR]++; 1960 nfsm_reqhead(dvp, NFSPROC_MKDIR, 1961 NFSX_FH(v3) + NFSX_UNSIGNED + nfsm_rndup(len) + NFSX_SATTR(v3)); 1962 nfsm_fhtom(dvp, v3); 1963 nfsm_strtom(cnp->cn_nameptr, len, NFS_MAXNAMLEN); 1964 if (v3) { 1965 nfsm_v3attrbuild(vap, FALSE); 1966 } else { 1967 nfsm_build(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 1968 sp->sa_mode = vtonfsv2_mode(VDIR, vap->va_mode); 1969 sp->sa_uid = nfs_xdrneg1; 1970 sp->sa_gid = nfs_xdrneg1; 1971 sp->sa_size = nfs_xdrneg1; 1972 txdr_nfsv2time(&vap->va_atime, &sp->sa_atime); 1973 txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime); 1974 } 1975 nfsm_request(dvp, NFSPROC_MKDIR, cnp->cn_proc, cnp->cn_cred); 1976 if (!error) 1977 nfsm_mtofh(dvp, newvp, v3, gotvp); 1978 if (v3) 1979 nfsm_wcc_data(dvp, wccflag); 1980 nfsm_reqdone; 1981 VTONFS(dvp)->n_flag |= NMODIFIED; 1982 if (!wccflag) 1983 VTONFS(dvp)->n_attrstamp = 0; 1984 /* 1985 * Kludge: Map EEXIST => 0 assuming that you have a reply to a retry 1986 * if we can succeed in looking up the directory. 1987 */ 1988 if (error == EEXIST || (!error && !gotvp)) { 1989 if (newvp) { 1990 vput(newvp); 1991 newvp = (struct vnode *)0; 1992 } 1993 error = nfs_lookitup(dvp, cnp->cn_nameptr, len, cnp->cn_cred, 1994 cnp->cn_proc, &np); 1995 if (!error) { 1996 newvp = NFSTOV(np); 1997 if (newvp->v_type != VDIR) 1998 error = EEXIST; 1999 } 2000 } 2001 if (error) { 2002 if (newvp) 2003 vput(newvp); 2004 } else { 2005 if (cnp->cn_flags & MAKEENTRY) 2006 cache_enter(dvp, newvp, cnp); 2007 *ap->a_vpp = newvp; 2008 } 2009 PNBUF_PUT(cnp->cn_pnbuf); 2010 vput(dvp); 2011 return (error); 2012 } 2013 2014 /* 2015 * nfs remove directory call 2016 */ 2017 int 2018 nfs_rmdir(v) 2019 void *v; 2020 { 2021 struct vop_rmdir_args /* { 2022 struct vnode *a_dvp; 2023 struct vnode *a_vp; 2024 struct componentname *a_cnp; 2025 } */ *ap = v; 2026 struct vnode *vp = ap->a_vp; 2027 struct vnode *dvp = ap->a_dvp; 2028 struct componentname *cnp = ap->a_cnp; 2029 u_int32_t *tl; 2030 caddr_t cp; 2031 int32_t t1, t2; 2032 caddr_t bpos, dpos, cp2; 2033 int error = 0, wccflag = NFSV3_WCCRATTR; 2034 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 2035 const int v3 = NFS_ISV3(dvp); 2036 2037 if (dvp == vp) { 2038 vrele(dvp); 2039 vput(dvp); 2040 PNBUF_PUT(cnp->cn_pnbuf); 2041 return (EINVAL); 2042 } 2043 nfsstats.rpccnt[NFSPROC_RMDIR]++; 2044 nfsm_reqhead(dvp, NFSPROC_RMDIR, 2045 NFSX_FH(v3) + NFSX_UNSIGNED + nfsm_rndup(cnp->cn_namelen)); 2046 nfsm_fhtom(dvp, v3); 2047 nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN); 2048 nfsm_request(dvp, NFSPROC_RMDIR, cnp->cn_proc, cnp->cn_cred); 2049 if (v3) 2050 nfsm_wcc_data(dvp, wccflag); 2051 nfsm_reqdone; 2052 PNBUF_PUT(cnp->cn_pnbuf); 2053 VTONFS(dvp)->n_flag |= NMODIFIED; 2054 if (!wccflag) 2055 VTONFS(dvp)->n_attrstamp = 0; 2056 cache_purge(dvp); 2057 cache_purge(vp); 2058 vput(vp); 2059 vput(dvp); 2060 /* 2061 * Kludge: Map ENOENT => 0 assuming that you have a reply to a retry. 2062 */ 2063 if (error == ENOENT) 2064 error = 0; 2065 return (error); 2066 } 2067 2068 /* 2069 * nfs readdir call 2070 */ 2071 int 2072 nfs_readdir(v) 2073 void *v; 2074 { 2075 struct vop_readdir_args /* { 2076 struct vnode *a_vp; 2077 struct uio *a_uio; 2078 struct ucred *a_cred; 2079 int *a_eofflag; 2080 off_t **a_cookies; 2081 int *a_ncookies; 2082 } */ *ap = v; 2083 struct vnode *vp = ap->a_vp; 2084 struct uio *uio = ap->a_uio; 2085 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 2086 char *base = uio->uio_iov->iov_base; 2087 int tresid, error; 2088 size_t count, lost; 2089 struct dirent *dp; 2090 off_t *cookies = NULL; 2091 int ncookies = 0, nc; 2092 2093 if (vp->v_type != VDIR) 2094 return (EPERM); 2095 2096 lost = uio->uio_resid & (NFS_DIRFRAGSIZ - 1); 2097 count = uio->uio_resid - lost; 2098 if (count <= 0) 2099 return (EINVAL); 2100 2101 /* 2102 * Call nfs_bioread() to do the real work. 2103 */ 2104 tresid = uio->uio_resid = count; 2105 error = nfs_bioread(vp, uio, 0, ap->a_cred, 2106 ap->a_cookies ? NFSBIO_CACHECOOKIES : 0); 2107 2108 if (!error && ap->a_cookies) { 2109 ncookies = count / 16; 2110 cookies = malloc(sizeof (off_t) * ncookies, M_TEMP, M_WAITOK); 2111 *ap->a_cookies = cookies; 2112 } 2113 2114 if (!error && uio->uio_resid == tresid) { 2115 uio->uio_resid += lost; 2116 nfsstats.direofcache_misses++; 2117 if (ap->a_cookies) 2118 *ap->a_ncookies = 0; 2119 *ap->a_eofflag = 1; 2120 return (0); 2121 } 2122 2123 if (!error && ap->a_cookies) { 2124 /* 2125 * Only the NFS server and emulations use cookies, and they 2126 * load the directory block into system space, so we can 2127 * just look at it directly. 2128 */ 2129 if (uio->uio_segflg != UIO_SYSSPACE || uio->uio_iovcnt != 1) 2130 panic("nfs_readdir: lost in space"); 2131 for (nc = 0; ncookies-- && 2132 base < (char *)uio->uio_iov->iov_base; nc++){ 2133 dp = (struct dirent *) base; 2134 if (dp->d_reclen == 0) 2135 break; 2136 if (nmp->nm_flag & NFSMNT_XLATECOOKIE) 2137 *(cookies++) = (off_t)NFS_GETCOOKIE32(dp); 2138 else 2139 *(cookies++) = NFS_GETCOOKIE(dp); 2140 base += dp->d_reclen; 2141 } 2142 uio->uio_resid += 2143 ((caddr_t)uio->uio_iov->iov_base - base); 2144 uio->uio_iov->iov_len += 2145 ((caddr_t)uio->uio_iov->iov_base - base); 2146 uio->uio_iov->iov_base = base; 2147 *ap->a_ncookies = nc; 2148 } 2149 2150 uio->uio_resid += lost; 2151 *ap->a_eofflag = 0; 2152 return (error); 2153 } 2154 2155 /* 2156 * Readdir rpc call. 2157 * Called from below the buffer cache by nfs_doio(). 2158 */ 2159 int 2160 nfs_readdirrpc(vp, uiop, cred) 2161 struct vnode *vp; 2162 struct uio *uiop; 2163 struct ucred *cred; 2164 { 2165 int len, left; 2166 struct dirent *dp = NULL; 2167 u_int32_t *tl; 2168 caddr_t cp; 2169 int32_t t1, t2; 2170 caddr_t bpos, dpos, cp2; 2171 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 2172 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 2173 struct nfsnode *dnp = VTONFS(vp); 2174 u_quad_t fileno; 2175 int error = 0, tlen, more_dirs = 1, blksiz = 0, bigenough = 1; 2176 int attrflag, nrpcs = 0, reclen; 2177 const int v3 = NFS_ISV3(vp); 2178 2179 #ifdef DIAGNOSTIC 2180 /* 2181 * Should be called from buffer cache, so only amount of 2182 * NFS_DIRBLKSIZ will be requested. 2183 */ 2184 if (uiop->uio_iovcnt != 1 || (uiop->uio_resid & (NFS_DIRBLKSIZ - 1))) 2185 panic("nfs readdirrpc bad uio"); 2186 #endif 2187 2188 /* 2189 * Loop around doing readdir rpc's of size nm_readdirsize 2190 * truncated to a multiple of NFS_DIRFRAGSIZ. 2191 * The stopping criteria is EOF or buffer full. 2192 */ 2193 while (more_dirs && bigenough) { 2194 /* 2195 * Heuristic: don't bother to do another RPC to further 2196 * fill up this block if there is not much room left. (< 50% 2197 * of the readdir RPC size). This wastes some buffer space 2198 * but can save up to 50% in RPC calls. 2199 */ 2200 if (nrpcs > 0 && uiop->uio_resid < (nmp->nm_readdirsize / 2)) { 2201 bigenough = 0; 2202 break; 2203 } 2204 nfsstats.rpccnt[NFSPROC_READDIR]++; 2205 nfsm_reqhead(vp, NFSPROC_READDIR, NFSX_FH(v3) + 2206 NFSX_READDIR(v3)); 2207 nfsm_fhtom(vp, v3); 2208 if (v3) { 2209 nfsm_build(tl, u_int32_t *, 5 * NFSX_UNSIGNED); 2210 if (nmp->nm_iflag & NFSMNT_SWAPCOOKIE) { 2211 txdr_swapcookie3(uiop->uio_offset, tl); 2212 } else { 2213 txdr_cookie3(uiop->uio_offset, tl); 2214 } 2215 tl += 2; 2216 *tl++ = dnp->n_cookieverf.nfsuquad[0]; 2217 *tl++ = dnp->n_cookieverf.nfsuquad[1]; 2218 } else { 2219 nfsm_build(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 2220 *tl++ = txdr_unsigned(uiop->uio_offset); 2221 } 2222 *tl = txdr_unsigned(nmp->nm_readdirsize); 2223 nfsm_request(vp, NFSPROC_READDIR, uiop->uio_procp, cred); 2224 nrpcs++; 2225 if (v3) { 2226 nfsm_postop_attr(vp, attrflag); 2227 if (!error) { 2228 nfsm_dissect(tl, u_int32_t *, 2229 2 * NFSX_UNSIGNED); 2230 dnp->n_cookieverf.nfsuquad[0] = *tl++; 2231 dnp->n_cookieverf.nfsuquad[1] = *tl; 2232 } else { 2233 m_freem(mrep); 2234 goto nfsmout; 2235 } 2236 } 2237 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 2238 more_dirs = fxdr_unsigned(int, *tl); 2239 2240 /* loop thru the dir entries, doctoring them to 4bsd form */ 2241 while (more_dirs && bigenough) { 2242 if (v3) { 2243 nfsm_dissect(tl, u_int32_t *, 2244 3 * NFSX_UNSIGNED); 2245 fileno = fxdr_hyper(tl); 2246 len = fxdr_unsigned(int, *(tl + 2)); 2247 } else { 2248 nfsm_dissect(tl, u_int32_t *, 2249 2 * NFSX_UNSIGNED); 2250 fileno = fxdr_unsigned(u_quad_t, *tl++); 2251 len = fxdr_unsigned(int, *tl); 2252 } 2253 if (len <= 0 || len > NFS_MAXNAMLEN) { 2254 error = EBADRPC; 2255 m_freem(mrep); 2256 goto nfsmout; 2257 } 2258 tlen = nfsm_rndup(len); 2259 if (tlen == len) 2260 tlen += 4; /* To ensure null termination */ 2261 tlen += sizeof (off_t) + sizeof (int); 2262 reclen = ALIGN(tlen + DIRHDSIZ); 2263 tlen = reclen - DIRHDSIZ; 2264 left = NFS_DIRFRAGSIZ - blksiz; 2265 if (reclen > left) { 2266 dp->d_reclen += left; 2267 uiop->uio_iov->iov_base = 2268 (caddr_t)uiop->uio_iov->iov_base + left; 2269 uiop->uio_iov->iov_len -= left; 2270 uiop->uio_resid -= left; 2271 blksiz = 0; 2272 NFS_STASHCOOKIE(dp, uiop->uio_offset); 2273 } 2274 if (reclen > uiop->uio_resid) 2275 bigenough = 0; 2276 if (bigenough) { 2277 dp = (struct dirent *)uiop->uio_iov->iov_base; 2278 dp->d_fileno = (int)fileno; 2279 dp->d_namlen = len; 2280 dp->d_reclen = reclen; 2281 dp->d_type = DT_UNKNOWN; 2282 blksiz += dp->d_reclen; 2283 if (blksiz == NFS_DIRFRAGSIZ) 2284 blksiz = 0; 2285 uiop->uio_resid -= DIRHDSIZ; 2286 uiop->uio_iov->iov_base = 2287 (caddr_t)uiop->uio_iov->iov_base + DIRHDSIZ; 2288 uiop->uio_iov->iov_len -= DIRHDSIZ; 2289 nfsm_mtouio(uiop, len); 2290 cp = uiop->uio_iov->iov_base; 2291 tlen -= len; 2292 *cp = '\0'; /* null terminate */ 2293 uiop->uio_iov->iov_base = 2294 (caddr_t)uiop->uio_iov->iov_base + tlen; 2295 uiop->uio_iov->iov_len -= tlen; 2296 uiop->uio_resid -= tlen; 2297 } else 2298 nfsm_adv(nfsm_rndup(len)); 2299 if (v3) { 2300 nfsm_dissect(tl, u_int32_t *, 2301 3 * NFSX_UNSIGNED); 2302 } else { 2303 nfsm_dissect(tl, u_int32_t *, 2304 2 * NFSX_UNSIGNED); 2305 } 2306 if (bigenough) { 2307 if (v3) { 2308 if (nmp->nm_iflag & NFSMNT_SWAPCOOKIE) 2309 uiop->uio_offset = 2310 fxdr_swapcookie3(tl); 2311 else 2312 uiop->uio_offset = 2313 fxdr_cookie3(tl); 2314 } 2315 else { 2316 uiop->uio_offset = 2317 fxdr_unsigned(off_t, *tl); 2318 } 2319 NFS_STASHCOOKIE(dp, uiop->uio_offset); 2320 } 2321 if (v3) 2322 tl += 2; 2323 else 2324 tl++; 2325 more_dirs = fxdr_unsigned(int, *tl); 2326 } 2327 /* 2328 * If at end of rpc data, get the eof boolean 2329 */ 2330 if (!more_dirs) { 2331 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 2332 more_dirs = (fxdr_unsigned(int, *tl) == 0); 2333 } 2334 m_freem(mrep); 2335 } 2336 /* 2337 * Fill last record, iff any, out to a multiple of NFS_DIRFRAGSIZ 2338 * by increasing d_reclen for the last record. 2339 */ 2340 if (blksiz > 0) { 2341 left = NFS_DIRFRAGSIZ - blksiz; 2342 dp->d_reclen += left; 2343 NFS_STASHCOOKIE(dp, uiop->uio_offset); 2344 uiop->uio_iov->iov_base = (caddr_t)uiop->uio_iov->iov_base + 2345 left; 2346 uiop->uio_iov->iov_len -= left; 2347 uiop->uio_resid -= left; 2348 } 2349 2350 /* 2351 * We are now either at the end of the directory or have filled the 2352 * block. 2353 */ 2354 if (bigenough) 2355 dnp->n_direofoffset = uiop->uio_offset; 2356 nfsmout: 2357 return (error); 2358 } 2359 2360 /* 2361 * NFS V3 readdir plus RPC. Used in place of nfs_readdirrpc(). 2362 */ 2363 int 2364 nfs_readdirplusrpc(vp, uiop, cred) 2365 struct vnode *vp; 2366 struct uio *uiop; 2367 struct ucred *cred; 2368 { 2369 int len, left; 2370 struct dirent *dp = NULL; 2371 u_int32_t *tl; 2372 caddr_t cp; 2373 int32_t t1, t2; 2374 struct vnode *newvp; 2375 caddr_t bpos, dpos, cp2; 2376 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 2377 struct nameidata nami, *ndp = &nami; 2378 struct componentname *cnp = &ndp->ni_cnd; 2379 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 2380 struct nfsnode *dnp = VTONFS(vp), *np; 2381 nfsfh_t *fhp; 2382 u_quad_t fileno; 2383 int error = 0, tlen, more_dirs = 1, blksiz = 0, doit, bigenough = 1, i; 2384 int attrflag, fhsize, nrpcs = 0, reclen; 2385 struct nfs_fattr fattr, *fp; 2386 2387 #ifdef DIAGNOSTIC 2388 if (uiop->uio_iovcnt != 1 || (uiop->uio_resid & (NFS_DIRBLKSIZ - 1))) 2389 panic("nfs readdirplusrpc bad uio"); 2390 #endif 2391 ndp->ni_dvp = vp; 2392 newvp = NULLVP; 2393 2394 /* 2395 * Loop around doing readdir rpc's of size nm_readdirsize 2396 * truncated to a multiple of NFS_DIRFRAGSIZ. 2397 * The stopping criteria is EOF or buffer full. 2398 */ 2399 while (more_dirs && bigenough) { 2400 if (nrpcs > 0 && uiop->uio_resid < (nmp->nm_readdirsize / 2)) { 2401 bigenough = 0; 2402 break; 2403 } 2404 nfsstats.rpccnt[NFSPROC_READDIRPLUS]++; 2405 nfsm_reqhead(vp, NFSPROC_READDIRPLUS, 2406 NFSX_FH(1) + 6 * NFSX_UNSIGNED); 2407 nfsm_fhtom(vp, 1); 2408 nfsm_build(tl, u_int32_t *, 6 * NFSX_UNSIGNED); 2409 if (nmp->nm_iflag & NFSMNT_SWAPCOOKIE) { 2410 txdr_swapcookie3(uiop->uio_offset, tl); 2411 } else { 2412 txdr_cookie3(uiop->uio_offset, tl); 2413 } 2414 tl += 2; 2415 *tl++ = dnp->n_cookieverf.nfsuquad[0]; 2416 *tl++ = dnp->n_cookieverf.nfsuquad[1]; 2417 *tl++ = txdr_unsigned(nmp->nm_readdirsize); 2418 *tl = txdr_unsigned(nmp->nm_rsize); 2419 nfsm_request(vp, NFSPROC_READDIRPLUS, uiop->uio_procp, cred); 2420 nfsm_postop_attr(vp, attrflag); 2421 if (error) { 2422 m_freem(mrep); 2423 goto nfsmout; 2424 } 2425 nrpcs++; 2426 nfsm_dissect(tl, u_int32_t *, 3 * NFSX_UNSIGNED); 2427 dnp->n_cookieverf.nfsuquad[0] = *tl++; 2428 dnp->n_cookieverf.nfsuquad[1] = *tl++; 2429 more_dirs = fxdr_unsigned(int, *tl); 2430 2431 /* loop thru the dir entries, doctoring them to 4bsd form */ 2432 while (more_dirs && bigenough) { 2433 nfsm_dissect(tl, u_int32_t *, 3 * NFSX_UNSIGNED); 2434 fileno = fxdr_hyper(tl); 2435 len = fxdr_unsigned(int, *(tl + 2)); 2436 if (len <= 0 || len > NFS_MAXNAMLEN) { 2437 error = EBADRPC; 2438 m_freem(mrep); 2439 goto nfsmout; 2440 } 2441 tlen = nfsm_rndup(len); 2442 if (tlen == len) 2443 tlen += 4; /* To ensure null termination*/ 2444 tlen += sizeof (off_t) + sizeof (int); 2445 reclen = ALIGN(tlen + DIRHDSIZ); 2446 tlen = reclen - DIRHDSIZ; 2447 left = NFS_DIRFRAGSIZ - blksiz; 2448 if (reclen > left) { 2449 /* 2450 * DIRFRAGSIZ is aligned, no need to align 2451 * again here. 2452 */ 2453 dp->d_reclen += left; 2454 uiop->uio_iov->iov_base = 2455 (caddr_t)uiop->uio_iov->iov_base + left; 2456 uiop->uio_iov->iov_len -= left; 2457 uiop->uio_resid -= left; 2458 NFS_STASHCOOKIE(dp, uiop->uio_offset); 2459 blksiz = 0; 2460 } 2461 if (reclen > uiop->uio_resid) 2462 bigenough = 0; 2463 if (bigenough) { 2464 dp = (struct dirent *)uiop->uio_iov->iov_base; 2465 dp->d_fileno = (int)fileno; 2466 dp->d_namlen = len; 2467 dp->d_reclen = reclen; 2468 dp->d_type = DT_UNKNOWN; 2469 blksiz += dp->d_reclen; 2470 if (blksiz == NFS_DIRFRAGSIZ) 2471 blksiz = 0; 2472 uiop->uio_resid -= DIRHDSIZ; 2473 uiop->uio_iov->iov_base = 2474 (caddr_t)uiop->uio_iov->iov_base + 2475 DIRHDSIZ; 2476 uiop->uio_iov->iov_len -= DIRHDSIZ; 2477 cnp->cn_nameptr = uiop->uio_iov->iov_base; 2478 cnp->cn_namelen = len; 2479 nfsm_mtouio(uiop, len); 2480 cp = uiop->uio_iov->iov_base; 2481 tlen -= len; 2482 *cp = '\0'; 2483 uiop->uio_iov->iov_base = 2484 (caddr_t)uiop->uio_iov->iov_base + tlen; 2485 uiop->uio_iov->iov_len -= tlen; 2486 uiop->uio_resid -= tlen; 2487 } else 2488 nfsm_adv(nfsm_rndup(len)); 2489 nfsm_dissect(tl, u_int32_t *, 3 * NFSX_UNSIGNED); 2490 if (bigenough) { 2491 if (nmp->nm_iflag & NFSMNT_SWAPCOOKIE) 2492 uiop->uio_offset = 2493 fxdr_swapcookie3(tl); 2494 else 2495 uiop->uio_offset = 2496 fxdr_cookie3(tl); 2497 NFS_STASHCOOKIE(dp, uiop->uio_offset); 2498 } 2499 tl += 2; 2500 2501 /* 2502 * Since the attributes are before the file handle 2503 * (sigh), we must skip over the attributes and then 2504 * come back and get them. 2505 */ 2506 attrflag = fxdr_unsigned(int, *tl); 2507 if (attrflag) { 2508 nfsm_dissect(fp, struct nfs_fattr *, NFSX_V3FATTR); 2509 memcpy(&fattr, fp, NFSX_V3FATTR); 2510 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 2511 doit = fxdr_unsigned(int, *tl); 2512 if (doit) { 2513 nfsm_getfh(fhp, fhsize, 1); 2514 if (NFS_CMPFH(dnp, fhp, fhsize)) { 2515 VREF(vp); 2516 newvp = vp; 2517 np = dnp; 2518 } else { 2519 error = nfs_nget(vp->v_mount, fhp, 2520 fhsize, &np); 2521 if (!error) 2522 newvp = NFSTOV(np); 2523 } 2524 if (!error) { 2525 const char *cp; 2526 2527 nfs_loadattrcache(&newvp, &fattr, 0); 2528 dp->d_type = 2529 IFTODT(VTTOIF(np->n_vattr->va_type)); 2530 ndp->ni_vp = newvp; 2531 cp = cnp->cn_nameptr + cnp->cn_namelen; 2532 cnp->cn_hash = 2533 namei_hash(cnp->cn_nameptr, &cp); 2534 if (cnp->cn_namelen <= NCHNAMLEN) 2535 cache_enter(ndp->ni_dvp, ndp->ni_vp, 2536 cnp); 2537 } 2538 } 2539 } else { 2540 /* Just skip over the file handle */ 2541 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 2542 i = fxdr_unsigned(int, *tl); 2543 nfsm_adv(nfsm_rndup(i)); 2544 } 2545 if (newvp != NULLVP) { 2546 vrele(newvp); 2547 if (newvp != vp) 2548 VOP_UNLOCK(vp, 0); 2549 newvp = NULLVP; 2550 } 2551 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 2552 more_dirs = fxdr_unsigned(int, *tl); 2553 } 2554 /* 2555 * If at end of rpc data, get the eof boolean 2556 */ 2557 if (!more_dirs) { 2558 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 2559 more_dirs = (fxdr_unsigned(int, *tl) == 0); 2560 } 2561 m_freem(mrep); 2562 } 2563 /* 2564 * Fill last record, iff any, out to a multiple of NFS_DIRFRAGSIZ 2565 * by increasing d_reclen for the last record. 2566 */ 2567 if (blksiz > 0) { 2568 left = NFS_DIRFRAGSIZ - blksiz; 2569 dp->d_reclen += left; 2570 NFS_STASHCOOKIE(dp, uiop->uio_offset); 2571 uiop->uio_iov->iov_base = (caddr_t)uiop->uio_iov->iov_base + 2572 left; 2573 uiop->uio_iov->iov_len -= left; 2574 uiop->uio_resid -= left; 2575 } 2576 2577 /* 2578 * We are now either at the end of the directory or have filled the 2579 * block. 2580 */ 2581 if (bigenough) 2582 dnp->n_direofoffset = uiop->uio_offset; 2583 nfsmout: 2584 if (newvp != NULLVP) { 2585 vrele(newvp); 2586 if (newvp != vp) 2587 VOP_UNLOCK(vp, 0); 2588 } 2589 return (error); 2590 } 2591 static char hextoasc[] = "0123456789abcdef"; 2592 2593 /* 2594 * Silly rename. To make the NFS filesystem that is stateless look a little 2595 * more like the "ufs" a remove of an active vnode is translated to a rename 2596 * to a funny looking filename that is removed by nfs_inactive on the 2597 * nfsnode. There is the potential for another process on a different client 2598 * to create the same funny name between the nfs_lookitup() fails and the 2599 * nfs_rename() completes, but... 2600 */ 2601 int 2602 nfs_sillyrename(dvp, vp, cnp) 2603 struct vnode *dvp, *vp; 2604 struct componentname *cnp; 2605 { 2606 struct sillyrename *sp; 2607 struct nfsnode *np; 2608 int error; 2609 short pid; 2610 2611 cache_purge(dvp); 2612 np = VTONFS(vp); 2613 #ifndef DIAGNOSTIC 2614 if (vp->v_type == VDIR) 2615 panic("nfs: sillyrename dir"); 2616 #endif 2617 MALLOC(sp, struct sillyrename *, sizeof (struct sillyrename), 2618 M_NFSREQ, M_WAITOK); 2619 sp->s_cred = crdup(cnp->cn_cred); 2620 sp->s_dvp = dvp; 2621 VREF(dvp); 2622 2623 /* Fudge together a funny name */ 2624 pid = cnp->cn_proc->p_pid; 2625 memcpy(sp->s_name, ".nfsAxxxx4.4", 13); 2626 sp->s_namlen = 12; 2627 sp->s_name[8] = hextoasc[pid & 0xf]; 2628 sp->s_name[7] = hextoasc[(pid >> 4) & 0xf]; 2629 sp->s_name[6] = hextoasc[(pid >> 8) & 0xf]; 2630 sp->s_name[5] = hextoasc[(pid >> 12) & 0xf]; 2631 2632 /* Try lookitups until we get one that isn't there */ 2633 while (nfs_lookitup(dvp, sp->s_name, sp->s_namlen, sp->s_cred, 2634 cnp->cn_proc, (struct nfsnode **)0) == 0) { 2635 sp->s_name[4]++; 2636 if (sp->s_name[4] > 'z') { 2637 error = EINVAL; 2638 goto bad; 2639 } 2640 } 2641 error = nfs_renameit(dvp, cnp, sp); 2642 if (error) 2643 goto bad; 2644 error = nfs_lookitup(dvp, sp->s_name, sp->s_namlen, sp->s_cred, 2645 cnp->cn_proc, &np); 2646 np->n_sillyrename = sp; 2647 return (0); 2648 bad: 2649 vrele(sp->s_dvp); 2650 crfree(sp->s_cred); 2651 free((caddr_t)sp, M_NFSREQ); 2652 return (error); 2653 } 2654 2655 /* 2656 * Look up a file name and optionally either update the file handle or 2657 * allocate an nfsnode, depending on the value of npp. 2658 * npp == NULL --> just do the lookup 2659 * *npp == NULL --> allocate a new nfsnode and make sure attributes are 2660 * handled too 2661 * *npp != NULL --> update the file handle in the vnode 2662 */ 2663 int 2664 nfs_lookitup(dvp, name, len, cred, procp, npp) 2665 struct vnode *dvp; 2666 const char *name; 2667 int len; 2668 struct ucred *cred; 2669 struct proc *procp; 2670 struct nfsnode **npp; 2671 { 2672 u_int32_t *tl; 2673 caddr_t cp; 2674 int32_t t1, t2; 2675 struct vnode *newvp = (struct vnode *)0; 2676 struct nfsnode *np, *dnp = VTONFS(dvp); 2677 caddr_t bpos, dpos, cp2; 2678 int error = 0, fhlen, attrflag; 2679 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 2680 nfsfh_t *nfhp; 2681 const int v3 = NFS_ISV3(dvp); 2682 2683 nfsstats.rpccnt[NFSPROC_LOOKUP]++; 2684 nfsm_reqhead(dvp, NFSPROC_LOOKUP, 2685 NFSX_FH(v3) + NFSX_UNSIGNED + nfsm_rndup(len)); 2686 nfsm_fhtom(dvp, v3); 2687 nfsm_strtom(name, len, NFS_MAXNAMLEN); 2688 nfsm_request(dvp, NFSPROC_LOOKUP, procp, cred); 2689 if (npp && !error) { 2690 nfsm_getfh(nfhp, fhlen, v3); 2691 if (*npp) { 2692 np = *npp; 2693 if (np->n_fhsize > NFS_SMALLFH && fhlen <= NFS_SMALLFH) { 2694 free((caddr_t)np->n_fhp, M_NFSBIGFH); 2695 np->n_fhp = &np->n_fh; 2696 } else if (np->n_fhsize <= NFS_SMALLFH && fhlen>NFS_SMALLFH) 2697 np->n_fhp =(nfsfh_t *)malloc(fhlen,M_NFSBIGFH,M_WAITOK); 2698 memcpy((caddr_t)np->n_fhp, (caddr_t)nfhp, fhlen); 2699 np->n_fhsize = fhlen; 2700 newvp = NFSTOV(np); 2701 } else if (NFS_CMPFH(dnp, nfhp, fhlen)) { 2702 VREF(dvp); 2703 newvp = dvp; 2704 } else { 2705 error = nfs_nget(dvp->v_mount, nfhp, fhlen, &np); 2706 if (error) { 2707 m_freem(mrep); 2708 return (error); 2709 } 2710 newvp = NFSTOV(np); 2711 } 2712 if (v3) { 2713 nfsm_postop_attr(newvp, attrflag); 2714 if (!attrflag && *npp == NULL) { 2715 m_freem(mrep); 2716 vput(newvp); 2717 return (ENOENT); 2718 } 2719 } else 2720 nfsm_loadattr(newvp, (struct vattr *)0); 2721 } 2722 nfsm_reqdone; 2723 if (npp && *npp == NULL) { 2724 if (error) { 2725 if (newvp) 2726 vput(newvp); 2727 } else 2728 *npp = np; 2729 } 2730 return (error); 2731 } 2732 2733 /* 2734 * Nfs Version 3 commit rpc 2735 */ 2736 int 2737 nfs_commit(vp, offset, cnt, procp) 2738 struct vnode *vp; 2739 off_t offset; 2740 uint32_t cnt; 2741 struct proc *procp; 2742 { 2743 caddr_t cp; 2744 u_int32_t *tl; 2745 int32_t t1, t2; 2746 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 2747 caddr_t bpos, dpos, cp2; 2748 int error = 0, wccflag = NFSV3_WCCRATTR; 2749 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 2750 2751 #ifdef fvdl_debug 2752 printf("commit %lu - %lu\n", (unsigned long)offset, 2753 (unsigned long)(offset + cnt)); 2754 #endif 2755 2756 if ((nmp->nm_iflag & NFSMNT_HASWRITEVERF) == 0) 2757 return (0); 2758 nfsstats.rpccnt[NFSPROC_COMMIT]++; 2759 nfsm_reqhead(vp, NFSPROC_COMMIT, NFSX_FH(1)); 2760 nfsm_fhtom(vp, 1); 2761 nfsm_build(tl, u_int32_t *, 3 * NFSX_UNSIGNED); 2762 txdr_hyper(offset, tl); 2763 tl += 2; 2764 *tl = txdr_unsigned(cnt); 2765 nfsm_request(vp, NFSPROC_COMMIT, procp, VTONFS(vp)->n_wcred); 2766 nfsm_wcc_data(vp, wccflag); 2767 if (!error) { 2768 nfsm_dissect(tl, u_int32_t *, NFSX_V3WRITEVERF); 2769 if (memcmp((caddr_t)nmp->nm_verf, (caddr_t)tl, 2770 NFSX_V3WRITEVERF)) { 2771 memcpy((caddr_t)nmp->nm_verf, (caddr_t)tl, 2772 NFSX_V3WRITEVERF); 2773 error = NFSERR_STALEWRITEVERF; 2774 } 2775 } 2776 nfsm_reqdone; 2777 return (error); 2778 } 2779 2780 /* 2781 * Kludge City.. 2782 * - make nfs_bmap() essentially a no-op that does no translation 2783 * - do nfs_strategy() by doing I/O with nfs_readrpc/nfs_writerpc 2784 * (Maybe I could use the process's page mapping, but I was concerned that 2785 * Kernel Write might not be enabled and also figured copyout() would do 2786 * a lot more work than memcpy() and also it currently happens in the 2787 * context of the swapper process (2). 2788 */ 2789 int 2790 nfs_bmap(v) 2791 void *v; 2792 { 2793 struct vop_bmap_args /* { 2794 struct vnode *a_vp; 2795 daddr_t a_bn; 2796 struct vnode **a_vpp; 2797 daddr_t *a_bnp; 2798 int *a_runp; 2799 } */ *ap = v; 2800 struct vnode *vp = ap->a_vp; 2801 int bshift = vp->v_mount->mnt_fs_bshift - vp->v_mount->mnt_dev_bshift; 2802 2803 if (ap->a_vpp != NULL) 2804 *ap->a_vpp = vp; 2805 if (ap->a_bnp != NULL) 2806 *ap->a_bnp = ap->a_bn << bshift; 2807 if (ap->a_runp != NULL) 2808 *ap->a_runp = 1024 * 1024; /* XXX */ 2809 return (0); 2810 } 2811 2812 /* 2813 * Strategy routine. 2814 * For async requests when nfsiod(s) are running, queue the request by 2815 * calling nfs_asyncio(), otherwise just all nfs_doio() to do the 2816 * request. 2817 */ 2818 int 2819 nfs_strategy(v) 2820 void *v; 2821 { 2822 struct vop_strategy_args *ap = v; 2823 struct buf *bp = ap->a_bp; 2824 struct proc *p; 2825 int error = 0; 2826 2827 if ((bp->b_flags & (B_PHYS|B_ASYNC)) == (B_PHYS|B_ASYNC)) 2828 panic("nfs physio/async"); 2829 if (bp->b_flags & B_ASYNC) 2830 p = NULL; 2831 else 2832 p = curproc; /* XXX */ 2833 2834 /* 2835 * If the op is asynchronous and an i/o daemon is waiting 2836 * queue the request, wake it up and wait for completion 2837 * otherwise just do it ourselves. 2838 */ 2839 2840 if ((bp->b_flags & B_ASYNC) == 0 || 2841 nfs_asyncio(bp)) 2842 error = nfs_doio(bp, p); 2843 return (error); 2844 } 2845 2846 /* 2847 * fsync vnode op. Just call nfs_flush() with commit == 1. 2848 */ 2849 /* ARGSUSED */ 2850 int 2851 nfs_fsync(v) 2852 void *v; 2853 { 2854 struct vop_fsync_args /* { 2855 struct vnodeop_desc *a_desc; 2856 struct vnode * a_vp; 2857 struct ucred * a_cred; 2858 int a_flags; 2859 off_t offlo; 2860 off_t offhi; 2861 struct proc * a_p; 2862 } */ *ap = v; 2863 2864 return (nfs_flush(ap->a_vp, ap->a_cred, 2865 (ap->a_flags & FSYNC_WAIT) != 0 ? MNT_WAIT : 0, ap->a_p, 1)); 2866 } 2867 2868 /* 2869 * Flush all the data associated with a vnode. 2870 */ 2871 int 2872 nfs_flush(vp, cred, waitfor, p, commit) 2873 struct vnode *vp; 2874 struct ucred *cred; 2875 int waitfor; 2876 struct proc *p; 2877 int commit; 2878 { 2879 struct nfsnode *np = VTONFS(vp); 2880 int error; 2881 int flushflags = PGO_ALLPAGES|PGO_CLEANIT|PGO_SYNCIO; 2882 UVMHIST_FUNC("nfs_flush"); UVMHIST_CALLED(ubchist); 2883 2884 simple_lock(&vp->v_interlock); 2885 error = VOP_PUTPAGES(vp, 0, 0, flushflags); 2886 if (np->n_flag & NWRITEERR) { 2887 error = np->n_error; 2888 np->n_flag &= ~NWRITEERR; 2889 } 2890 UVMHIST_LOG(ubchist, "returning %d", error,0,0,0); 2891 return (error); 2892 } 2893 2894 /* 2895 * Return POSIX pathconf information applicable to nfs. 2896 * 2897 * N.B. The NFS V2 protocol doesn't support this RPC. 2898 */ 2899 /* ARGSUSED */ 2900 int 2901 nfs_pathconf(v) 2902 void *v; 2903 { 2904 struct vop_pathconf_args /* { 2905 struct vnode *a_vp; 2906 int a_name; 2907 register_t *a_retval; 2908 } */ *ap = v; 2909 struct nfsv3_pathconf *pcp; 2910 struct vnode *vp = ap->a_vp; 2911 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 2912 int32_t t1, t2; 2913 u_int32_t *tl; 2914 caddr_t bpos, dpos, cp, cp2; 2915 int error = 0, attrflag; 2916 #ifndef NFS_V2_ONLY 2917 struct nfsmount *nmp; 2918 unsigned int l; 2919 u_int64_t maxsize; 2920 #endif 2921 const int v3 = NFS_ISV3(vp); 2922 2923 switch (ap->a_name) { 2924 /* Names that can be resolved locally. */ 2925 case _PC_PIPE_BUF: 2926 *ap->a_retval = PIPE_BUF; 2927 break; 2928 case _PC_SYNC_IO: 2929 *ap->a_retval = 1; 2930 break; 2931 /* Names that cannot be resolved locally; do an RPC, if possible. */ 2932 case _PC_LINK_MAX: 2933 case _PC_NAME_MAX: 2934 case _PC_CHOWN_RESTRICTED: 2935 case _PC_NO_TRUNC: 2936 if (!v3) { 2937 error = EINVAL; 2938 break; 2939 } 2940 nfsstats.rpccnt[NFSPROC_PATHCONF]++; 2941 nfsm_reqhead(vp, NFSPROC_PATHCONF, NFSX_FH(1)); 2942 nfsm_fhtom(vp, 1); 2943 nfsm_request(vp, NFSPROC_PATHCONF, 2944 curproc, curproc->p_ucred); /* XXX */ 2945 nfsm_postop_attr(vp, attrflag); 2946 if (!error) { 2947 nfsm_dissect(pcp, struct nfsv3_pathconf *, 2948 NFSX_V3PATHCONF); 2949 switch (ap->a_name) { 2950 case _PC_LINK_MAX: 2951 *ap->a_retval = 2952 fxdr_unsigned(register_t, pcp->pc_linkmax); 2953 break; 2954 case _PC_NAME_MAX: 2955 *ap->a_retval = 2956 fxdr_unsigned(register_t, pcp->pc_namemax); 2957 break; 2958 case _PC_CHOWN_RESTRICTED: 2959 *ap->a_retval = 2960 (pcp->pc_chownrestricted == nfs_true); 2961 break; 2962 case _PC_NO_TRUNC: 2963 *ap->a_retval = 2964 (pcp->pc_notrunc == nfs_true); 2965 break; 2966 } 2967 } 2968 nfsm_reqdone; 2969 break; 2970 case _PC_FILESIZEBITS: 2971 #ifndef NFS_V2_ONLY 2972 if (v3) { 2973 nmp = VFSTONFS(vp->v_mount); 2974 if ((nmp->nm_iflag & NFSMNT_GOTFSINFO) == 0) 2975 if ((error = nfs_fsinfo(nmp, vp, 2976 curproc->p_ucred, curproc)) != 0) /* XXX */ 2977 break; 2978 for (l = 0, maxsize = nmp->nm_maxfilesize; 2979 (maxsize >> l) > 0; l++) 2980 ; 2981 *ap->a_retval = l + 1; 2982 } else 2983 #endif 2984 { 2985 *ap->a_retval = 32; /* NFS V2 limitation */ 2986 } 2987 break; 2988 default: 2989 error = EINVAL; 2990 break; 2991 } 2992 2993 return (error); 2994 } 2995 2996 /* 2997 * NFS advisory byte-level locks. 2998 */ 2999 int 3000 nfs_advlock(v) 3001 void *v; 3002 { 3003 struct vop_advlock_args /* { 3004 struct vnode *a_vp; 3005 caddr_t a_id; 3006 int a_op; 3007 struct flock *a_fl; 3008 int a_flags; 3009 } */ *ap = v; 3010 struct nfsnode *np = VTONFS(ap->a_vp); 3011 3012 return lf_advlock(ap, &np->n_lockf, np->n_size); 3013 } 3014 3015 /* 3016 * Print out the contents of an nfsnode. 3017 */ 3018 int 3019 nfs_print(v) 3020 void *v; 3021 { 3022 struct vop_print_args /* { 3023 struct vnode *a_vp; 3024 } */ *ap = v; 3025 struct vnode *vp = ap->a_vp; 3026 struct nfsnode *np = VTONFS(vp); 3027 3028 printf("tag VT_NFS, fileid %ld fsid 0x%lx", 3029 np->n_vattr->va_fileid, np->n_vattr->va_fsid); 3030 if (vp->v_type == VFIFO) 3031 fifo_printinfo(vp); 3032 printf("\n"); 3033 return (0); 3034 } 3035 3036 /* 3037 * NFS file truncation. 3038 */ 3039 int 3040 nfs_truncate(v) 3041 void *v; 3042 { 3043 #if 0 3044 struct vop_truncate_args /* { 3045 struct vnode *a_vp; 3046 off_t a_length; 3047 int a_flags; 3048 struct ucred *a_cred; 3049 struct proc *a_p; 3050 } */ *ap = v; 3051 #endif 3052 3053 /* Use nfs_setattr */ 3054 return (EOPNOTSUPP); 3055 } 3056 3057 /* 3058 * NFS update. 3059 */ 3060 int 3061 nfs_update(v) 3062 void *v; 3063 #if 0 3064 struct vop_update_args /* { 3065 struct vnode *a_vp; 3066 struct timespec *a_ta; 3067 struct timespec *a_tm; 3068 int a_waitfor; 3069 } */ *ap = v; 3070 #endif 3071 { 3072 3073 /* Use nfs_setattr */ 3074 return (EOPNOTSUPP); 3075 } 3076 3077 /* 3078 * Just call bwrite(). 3079 */ 3080 int 3081 nfs_bwrite(v) 3082 void *v; 3083 { 3084 struct vop_bwrite_args /* { 3085 struct vnode *a_bp; 3086 } */ *ap = v; 3087 3088 return (bwrite(ap->a_bp)); 3089 } 3090 3091 /* 3092 * nfs special file access vnode op. 3093 * Essentially just get vattr and then imitate iaccess() since the device is 3094 * local to the client. 3095 */ 3096 int 3097 nfsspec_access(v) 3098 void *v; 3099 { 3100 struct vop_access_args /* { 3101 struct vnode *a_vp; 3102 int a_mode; 3103 struct ucred *a_cred; 3104 struct proc *a_p; 3105 } */ *ap = v; 3106 struct vattr va; 3107 struct vnode *vp = ap->a_vp; 3108 int error; 3109 3110 error = VOP_GETATTR(vp, &va, ap->a_cred, ap->a_p); 3111 if (error) 3112 return (error); 3113 3114 /* 3115 * Disallow write attempts on filesystems mounted read-only; 3116 * unless the file is a socket, fifo, or a block or character 3117 * device resident on the filesystem. 3118 */ 3119 if ((ap->a_mode & VWRITE) && (vp->v_mount->mnt_flag & MNT_RDONLY)) { 3120 switch (vp->v_type) { 3121 case VREG: 3122 case VDIR: 3123 case VLNK: 3124 return (EROFS); 3125 default: 3126 break; 3127 } 3128 } 3129 3130 return (vaccess(va.va_type, va.va_mode, 3131 va.va_uid, va.va_gid, ap->a_mode, ap->a_cred)); 3132 } 3133 3134 /* 3135 * Read wrapper for special devices. 3136 */ 3137 int 3138 nfsspec_read(v) 3139 void *v; 3140 { 3141 struct vop_read_args /* { 3142 struct vnode *a_vp; 3143 struct uio *a_uio; 3144 int a_ioflag; 3145 struct ucred *a_cred; 3146 } */ *ap = v; 3147 struct nfsnode *np = VTONFS(ap->a_vp); 3148 3149 /* 3150 * Set access flag. 3151 */ 3152 np->n_flag |= NACC; 3153 np->n_atim.tv_sec = time.tv_sec; 3154 np->n_atim.tv_nsec = time.tv_usec * 1000; 3155 return (VOCALL(spec_vnodeop_p, VOFFSET(vop_read), ap)); 3156 } 3157 3158 /* 3159 * Write wrapper for special devices. 3160 */ 3161 int 3162 nfsspec_write(v) 3163 void *v; 3164 { 3165 struct vop_write_args /* { 3166 struct vnode *a_vp; 3167 struct uio *a_uio; 3168 int a_ioflag; 3169 struct ucred *a_cred; 3170 } */ *ap = v; 3171 struct nfsnode *np = VTONFS(ap->a_vp); 3172 3173 /* 3174 * Set update flag. 3175 */ 3176 np->n_flag |= NUPD; 3177 np->n_mtim.tv_sec = time.tv_sec; 3178 np->n_mtim.tv_nsec = time.tv_usec * 1000; 3179 return (VOCALL(spec_vnodeop_p, VOFFSET(vop_write), ap)); 3180 } 3181 3182 /* 3183 * Close wrapper for special devices. 3184 * 3185 * Update the times on the nfsnode then do device close. 3186 */ 3187 int 3188 nfsspec_close(v) 3189 void *v; 3190 { 3191 struct vop_close_args /* { 3192 struct vnode *a_vp; 3193 int a_fflag; 3194 struct ucred *a_cred; 3195 struct proc *a_p; 3196 } */ *ap = v; 3197 struct vnode *vp = ap->a_vp; 3198 struct nfsnode *np = VTONFS(vp); 3199 struct vattr vattr; 3200 3201 if (np->n_flag & (NACC | NUPD)) { 3202 np->n_flag |= NCHG; 3203 if (vp->v_usecount == 1 && 3204 (vp->v_mount->mnt_flag & MNT_RDONLY) == 0) { 3205 VATTR_NULL(&vattr); 3206 if (np->n_flag & NACC) 3207 vattr.va_atime = np->n_atim; 3208 if (np->n_flag & NUPD) 3209 vattr.va_mtime = np->n_mtim; 3210 (void)VOP_SETATTR(vp, &vattr, ap->a_cred, ap->a_p); 3211 } 3212 } 3213 return (VOCALL(spec_vnodeop_p, VOFFSET(vop_close), ap)); 3214 } 3215 3216 /* 3217 * Read wrapper for fifos. 3218 */ 3219 int 3220 nfsfifo_read(v) 3221 void *v; 3222 { 3223 struct vop_read_args /* { 3224 struct vnode *a_vp; 3225 struct uio *a_uio; 3226 int a_ioflag; 3227 struct ucred *a_cred; 3228 } */ *ap = v; 3229 struct nfsnode *np = VTONFS(ap->a_vp); 3230 3231 /* 3232 * Set access flag. 3233 */ 3234 np->n_flag |= NACC; 3235 np->n_atim.tv_sec = time.tv_sec; 3236 np->n_atim.tv_nsec = time.tv_usec * 1000; 3237 return (VOCALL(fifo_vnodeop_p, VOFFSET(vop_read), ap)); 3238 } 3239 3240 /* 3241 * Write wrapper for fifos. 3242 */ 3243 int 3244 nfsfifo_write(v) 3245 void *v; 3246 { 3247 struct vop_write_args /* { 3248 struct vnode *a_vp; 3249 struct uio *a_uio; 3250 int a_ioflag; 3251 struct ucred *a_cred; 3252 } */ *ap = v; 3253 struct nfsnode *np = VTONFS(ap->a_vp); 3254 3255 /* 3256 * Set update flag. 3257 */ 3258 np->n_flag |= NUPD; 3259 np->n_mtim.tv_sec = time.tv_sec; 3260 np->n_mtim.tv_nsec = time.tv_usec * 1000; 3261 return (VOCALL(fifo_vnodeop_p, VOFFSET(vop_write), ap)); 3262 } 3263 3264 /* 3265 * Close wrapper for fifos. 3266 * 3267 * Update the times on the nfsnode then do fifo close. 3268 */ 3269 int 3270 nfsfifo_close(v) 3271 void *v; 3272 { 3273 struct vop_close_args /* { 3274 struct vnode *a_vp; 3275 int a_fflag; 3276 struct ucred *a_cred; 3277 struct proc *a_p; 3278 } */ *ap = v; 3279 struct vnode *vp = ap->a_vp; 3280 struct nfsnode *np = VTONFS(vp); 3281 struct vattr vattr; 3282 3283 if (np->n_flag & (NACC | NUPD)) { 3284 if (np->n_flag & NACC) { 3285 np->n_atim.tv_sec = time.tv_sec; 3286 np->n_atim.tv_nsec = time.tv_usec * 1000; 3287 } 3288 if (np->n_flag & NUPD) { 3289 np->n_mtim.tv_sec = time.tv_sec; 3290 np->n_mtim.tv_nsec = time.tv_usec * 1000; 3291 } 3292 np->n_flag |= NCHG; 3293 if (vp->v_usecount == 1 && 3294 (vp->v_mount->mnt_flag & MNT_RDONLY) == 0) { 3295 VATTR_NULL(&vattr); 3296 if (np->n_flag & NACC) 3297 vattr.va_atime = np->n_atim; 3298 if (np->n_flag & NUPD) 3299 vattr.va_mtime = np->n_mtim; 3300 (void)VOP_SETATTR(vp, &vattr, ap->a_cred, ap->a_p); 3301 } 3302 } 3303 return (VOCALL(fifo_vnodeop_p, VOFFSET(vop_close), ap)); 3304 } 3305
Indexes created Thu Sep 25 02:09:54 GMT 2025