nfs_vnops.c revision 1.1.1.4
1 /* 2 * Copyright (c) 1989, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * This code is derived from software contributed to Berkeley by 6 * Rick Macklem at The University of Guelph. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. All advertising materials mentioning features or use of this software 17 * must display the following acknowledgement: 18 * This product includes software developed by the University of 19 * California, Berkeley and its contributors. 20 * 4. Neither the name of the University nor the names of its contributors 21 * may be used to endorse or promote products derived from this software 22 * without specific prior written permission. 23 * 24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 34 * SUCH DAMAGE. 35 * 36 * @(#)nfs_vnops.c 8.19 (Berkeley) 7/31/95 37 */ 38 39 40 /* 41 * vnode op calls for Sun NFS version 2 and 3 42 */ 43 44 #include <sys/param.h> 45 #include <sys/kernel.h> 46 #include <sys/systm.h> 47 #include <sys/resourcevar.h> 48 #include <sys/proc.h> 49 #include <sys/mount.h> 50 #include <sys/buf.h> 51 #include <sys/malloc.h> 52 #include <sys/mbuf.h> 53 #include <sys/conf.h> 54 #include <sys/namei.h> 55 #include <sys/vnode.h> 56 #include <sys/dirent.h> 57 #include <sys/fcntl.h> 58 #include <ufs/ufs/dir.h> 59 60 #include <vm/vm.h> 61 62 #include <miscfs/specfs/specdev.h> 63 #include <miscfs/fifofs/fifo.h> 64 65 #include <nfs/rpcv2.h> 66 #include <nfs/nfsproto.h> 67 #include <nfs/nfs.h> 68 #include <nfs/nfsnode.h> 69 #include <nfs/nfsmount.h> 70 #include <nfs/xdr_subs.h> 71 #include <nfs/nfsm_subs.h> 72 #include <nfs/nqnfs.h> 73 74 #include <net/if.h> 75 #include <netinet/in.h> 76 #include <netinet/in_var.h> 77 78 /* Defs */ 79 #define TRUE 1 80 #define FALSE 0 81 82 /* 83 * Global vfs data structures for nfs 84 */ 85 int (**nfsv2_vnodeop_p)(); 86 struct vnodeopv_entry_desc nfsv2_vnodeop_entries[] = { 87 { &vop_default_desc, vn_default_error }, 88 { &vop_lookup_desc, nfs_lookup }, /* lookup */ 89 { &vop_create_desc, nfs_create }, /* create */ 90 { &vop_mknod_desc, nfs_mknod }, /* mknod */ 91 { &vop_open_desc, nfs_open }, /* open */ 92 { &vop_close_desc, nfs_close }, /* close */ 93 { &vop_access_desc, nfs_access }, /* access */ 94 { &vop_getattr_desc, nfs_getattr }, /* getattr */ 95 { &vop_setattr_desc, nfs_setattr }, /* setattr */ 96 { &vop_read_desc, nfs_read }, /* read */ 97 { &vop_write_desc, nfs_write }, /* write */ 98 { &vop_lease_desc, nfs_lease_check }, /* lease */ 99 { &vop_ioctl_desc, nfs_ioctl }, /* ioctl */ 100 { &vop_select_desc, nfs_select }, /* select */ 101 { &vop_revoke_desc, nfs_revoke }, /* revoke */ 102 { &vop_mmap_desc, nfs_mmap }, /* mmap */ 103 { &vop_fsync_desc, nfs_fsync }, /* fsync */ 104 { &vop_seek_desc, nfs_seek }, /* seek */ 105 { &vop_remove_desc, nfs_remove }, /* remove */ 106 { &vop_link_desc, nfs_link }, /* link */ 107 { &vop_rename_desc, nfs_rename }, /* rename */ 108 { &vop_mkdir_desc, nfs_mkdir }, /* mkdir */ 109 { &vop_rmdir_desc, nfs_rmdir }, /* rmdir */ 110 { &vop_symlink_desc, nfs_symlink }, /* symlink */ 111 { &vop_readdir_desc, nfs_readdir }, /* readdir */ 112 { &vop_readlink_desc, nfs_readlink }, /* readlink */ 113 { &vop_abortop_desc, nfs_abortop }, /* abortop */ 114 { &vop_inactive_desc, nfs_inactive }, /* inactive */ 115 { &vop_reclaim_desc, nfs_reclaim }, /* reclaim */ 116 { &vop_lock_desc, nfs_lock }, /* lock */ 117 { &vop_unlock_desc, nfs_unlock }, /* unlock */ 118 { &vop_bmap_desc, nfs_bmap }, /* bmap */ 119 { &vop_strategy_desc, nfs_strategy }, /* strategy */ 120 { &vop_print_desc, nfs_print }, /* print */ 121 { &vop_islocked_desc, nfs_islocked }, /* islocked */ 122 { &vop_pathconf_desc, nfs_pathconf }, /* pathconf */ 123 { &vop_advlock_desc, nfs_advlock }, /* advlock */ 124 { &vop_blkatoff_desc, nfs_blkatoff }, /* blkatoff */ 125 { &vop_valloc_desc, nfs_valloc }, /* valloc */ 126 { &vop_reallocblks_desc, nfs_reallocblks }, /* reallocblks */ 127 { &vop_vfree_desc, nfs_vfree }, /* vfree */ 128 { &vop_truncate_desc, nfs_truncate }, /* truncate */ 129 { &vop_update_desc, nfs_update }, /* update */ 130 { &vop_bwrite_desc, nfs_bwrite }, 131 { (struct vnodeop_desc*)NULL, (int(*)())NULL } 132 }; 133 struct vnodeopv_desc nfsv2_vnodeop_opv_desc = 134 { &nfsv2_vnodeop_p, nfsv2_vnodeop_entries }; 135 136 /* 137 * Special device vnode ops 138 */ 139 int (**spec_nfsv2nodeop_p)(); 140 struct vnodeopv_entry_desc spec_nfsv2nodeop_entries[] = { 141 { &vop_default_desc, vn_default_error }, 142 { &vop_lookup_desc, spec_lookup }, /* lookup */ 143 { &vop_create_desc, spec_create }, /* create */ 144 { &vop_mknod_desc, spec_mknod }, /* mknod */ 145 { &vop_open_desc, spec_open }, /* open */ 146 { &vop_close_desc, nfsspec_close }, /* close */ 147 { &vop_access_desc, nfsspec_access }, /* access */ 148 { &vop_getattr_desc, nfs_getattr }, /* getattr */ 149 { &vop_setattr_desc, nfs_setattr }, /* setattr */ 150 { &vop_read_desc, nfsspec_read }, /* read */ 151 { &vop_write_desc, nfsspec_write }, /* write */ 152 { &vop_lease_desc, spec_lease_check }, /* lease */ 153 { &vop_ioctl_desc, spec_ioctl }, /* ioctl */ 154 { &vop_select_desc, spec_select }, /* select */ 155 { &vop_revoke_desc, spec_revoke }, /* revoke */ 156 { &vop_mmap_desc, spec_mmap }, /* mmap */ 157 { &vop_fsync_desc, nfs_fsync }, /* fsync */ 158 { &vop_seek_desc, spec_seek }, /* seek */ 159 { &vop_remove_desc, spec_remove }, /* remove */ 160 { &vop_link_desc, spec_link }, /* link */ 161 { &vop_rename_desc, spec_rename }, /* rename */ 162 { &vop_mkdir_desc, spec_mkdir }, /* mkdir */ 163 { &vop_rmdir_desc, spec_rmdir }, /* rmdir */ 164 { &vop_symlink_desc, spec_symlink }, /* symlink */ 165 { &vop_readdir_desc, spec_readdir }, /* readdir */ 166 { &vop_readlink_desc, spec_readlink }, /* readlink */ 167 { &vop_abortop_desc, spec_abortop }, /* abortop */ 168 { &vop_inactive_desc, nfs_inactive }, /* inactive */ 169 { &vop_reclaim_desc, nfs_reclaim }, /* reclaim */ 170 { &vop_lock_desc, nfs_lock }, /* lock */ 171 { &vop_unlock_desc, nfs_unlock }, /* unlock */ 172 { &vop_bmap_desc, spec_bmap }, /* bmap */ 173 { &vop_strategy_desc, spec_strategy }, /* strategy */ 174 { &vop_print_desc, nfs_print }, /* print */ 175 { &vop_islocked_desc, nfs_islocked }, /* islocked */ 176 { &vop_pathconf_desc, spec_pathconf }, /* pathconf */ 177 { &vop_advlock_desc, spec_advlock }, /* advlock */ 178 { &vop_blkatoff_desc, spec_blkatoff }, /* blkatoff */ 179 { &vop_valloc_desc, spec_valloc }, /* valloc */ 180 { &vop_reallocblks_desc, spec_reallocblks }, /* reallocblks */ 181 { &vop_vfree_desc, spec_vfree }, /* vfree */ 182 { &vop_truncate_desc, spec_truncate }, /* truncate */ 183 { &vop_update_desc, nfs_update }, /* update */ 184 { &vop_bwrite_desc, vn_bwrite }, 185 { (struct vnodeop_desc*)NULL, (int(*)())NULL } 186 }; 187 struct vnodeopv_desc spec_nfsv2nodeop_opv_desc = 188 { &spec_nfsv2nodeop_p, spec_nfsv2nodeop_entries }; 189 190 int (**fifo_nfsv2nodeop_p)(); 191 struct vnodeopv_entry_desc fifo_nfsv2nodeop_entries[] = { 192 { &vop_default_desc, vn_default_error }, 193 { &vop_lookup_desc, fifo_lookup }, /* lookup */ 194 { &vop_create_desc, fifo_create }, /* create */ 195 { &vop_mknod_desc, fifo_mknod }, /* mknod */ 196 { &vop_open_desc, fifo_open }, /* open */ 197 { &vop_close_desc, nfsfifo_close }, /* close */ 198 { &vop_access_desc, nfsspec_access }, /* access */ 199 { &vop_getattr_desc, nfs_getattr }, /* getattr */ 200 { &vop_setattr_desc, nfs_setattr }, /* setattr */ 201 { &vop_read_desc, nfsfifo_read }, /* read */ 202 { &vop_write_desc, nfsfifo_write }, /* write */ 203 { &vop_lease_desc, fifo_lease_check }, /* lease */ 204 { &vop_ioctl_desc, fifo_ioctl }, /* ioctl */ 205 { &vop_select_desc, fifo_select }, /* select */ 206 { &vop_revoke_desc, fifo_revoke }, /* revoke */ 207 { &vop_mmap_desc, fifo_mmap }, /* mmap */ 208 { &vop_fsync_desc, nfs_fsync }, /* fsync */ 209 { &vop_seek_desc, fifo_seek }, /* seek */ 210 { &vop_remove_desc, fifo_remove }, /* remove */ 211 { &vop_link_desc, fifo_link }, /* link */ 212 { &vop_rename_desc, fifo_rename }, /* rename */ 213 { &vop_mkdir_desc, fifo_mkdir }, /* mkdir */ 214 { &vop_rmdir_desc, fifo_rmdir }, /* rmdir */ 215 { &vop_symlink_desc, fifo_symlink }, /* symlink */ 216 { &vop_readdir_desc, fifo_readdir }, /* readdir */ 217 { &vop_readlink_desc, fifo_readlink }, /* readlink */ 218 { &vop_abortop_desc, fifo_abortop }, /* abortop */ 219 { &vop_inactive_desc, nfs_inactive }, /* inactive */ 220 { &vop_reclaim_desc, nfs_reclaim }, /* reclaim */ 221 { &vop_lock_desc, nfs_lock }, /* lock */ 222 { &vop_unlock_desc, nfs_unlock }, /* unlock */ 223 { &vop_bmap_desc, fifo_bmap }, /* bmap */ 224 { &vop_strategy_desc, fifo_badop }, /* strategy */ 225 { &vop_print_desc, nfs_print }, /* print */ 226 { &vop_islocked_desc, nfs_islocked }, /* islocked */ 227 { &vop_pathconf_desc, fifo_pathconf }, /* pathconf */ 228 { &vop_advlock_desc, fifo_advlock }, /* advlock */ 229 { &vop_blkatoff_desc, fifo_blkatoff }, /* blkatoff */ 230 { &vop_valloc_desc, fifo_valloc }, /* valloc */ 231 { &vop_reallocblks_desc, fifo_reallocblks }, /* reallocblks */ 232 { &vop_vfree_desc, fifo_vfree }, /* vfree */ 233 { &vop_truncate_desc, fifo_truncate }, /* truncate */ 234 { &vop_update_desc, nfs_update }, /* update */ 235 { &vop_bwrite_desc, vn_bwrite }, 236 { (struct vnodeop_desc*)NULL, (int(*)())NULL } 237 }; 238 struct vnodeopv_desc fifo_nfsv2nodeop_opv_desc = 239 { &fifo_nfsv2nodeop_p, fifo_nfsv2nodeop_entries }; 240 241 void nqnfs_clientlease(); 242 int nfs_commit(); 243 244 /* 245 * Global variables 246 */ 247 extern u_long nfs_true, nfs_false; 248 extern struct nfsstats nfsstats; 249 extern nfstype nfsv3_type[9]; 250 struct proc *nfs_iodwant[NFS_MAXASYNCDAEMON]; 251 int nfs_numasync = 0; 252 #define DIRHDSIZ (sizeof (struct dirent) - (MAXNAMLEN + 1)) 253 254 /* 255 * nfs null call from vfs. 256 */ 257 int 258 nfs_null(vp, cred, procp) 259 struct vnode *vp; 260 struct ucred *cred; 261 struct proc *procp; 262 { 263 caddr_t bpos, dpos; 264 int error = 0; 265 struct mbuf *mreq, *mrep, *md, *mb; 266 267 nfsm_reqhead(vp, NFSPROC_NULL, 0); 268 nfsm_request(vp, NFSPROC_NULL, procp, cred); 269 nfsm_reqdone; 270 return (error); 271 } 272 273 /* 274 * nfs access vnode op. 275 * For nfs version 2, just return ok. File accesses may fail later. 276 * For nfs version 3, use the access rpc to check accessibility. If file modes 277 * are changed on the server, accesses might still fail later. 278 */ 279 int 280 nfs_access(ap) 281 struct vop_access_args /* { 282 struct vnode *a_vp; 283 int a_mode; 284 struct ucred *a_cred; 285 struct proc *a_p; 286 } */ *ap; 287 { 288 register struct vnode *vp = ap->a_vp; 289 register u_long *tl; 290 register caddr_t cp; 291 register int t1, t2; 292 caddr_t bpos, dpos, cp2; 293 int error = 0, attrflag; 294 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 295 u_long mode, rmode; 296 int v3 = NFS_ISV3(vp); 297 298 /* 299 * Disallow write attempts on filesystems mounted read-only; 300 * unless the file is a socket, fifo, or a block or character 301 * device resident on the filesystem. 302 */ 303 if ((ap->a_mode & VWRITE) && (vp->v_mount->mnt_flag & MNT_RDONLY)) { 304 switch (vp->v_type) { 305 case VREG: case VDIR: case VLNK: 306 return (EROFS); 307 } 308 } 309 /* 310 * For nfs v3, do an access rpc, otherwise you are stuck emulating 311 * ufs_access() locally using the vattr. This may not be correct, 312 * since the server may apply other access criteria such as 313 * client uid-->server uid mapping that we do not know about, but 314 * this is better than just returning anything that is lying about 315 * in the cache. 316 */ 317 if (v3) { 318 nfsstats.rpccnt[NFSPROC_ACCESS]++; 319 nfsm_reqhead(vp, NFSPROC_ACCESS, NFSX_FH(v3) + NFSX_UNSIGNED); 320 nfsm_fhtom(vp, v3); 321 nfsm_build(tl, u_long *, NFSX_UNSIGNED); 322 if (ap->a_mode & VREAD) 323 mode = NFSV3ACCESS_READ; 324 else 325 mode = 0; 326 if (vp->v_type == VDIR) { 327 if (ap->a_mode & VWRITE) 328 mode |= (NFSV3ACCESS_MODIFY | NFSV3ACCESS_EXTEND | 329 NFSV3ACCESS_DELETE); 330 if (ap->a_mode & VEXEC) 331 mode |= NFSV3ACCESS_LOOKUP; 332 } else { 333 if (ap->a_mode & VWRITE) 334 mode |= (NFSV3ACCESS_MODIFY | NFSV3ACCESS_EXTEND); 335 if (ap->a_mode & VEXEC) 336 mode |= NFSV3ACCESS_EXECUTE; 337 } 338 *tl = txdr_unsigned(mode); 339 nfsm_request(vp, NFSPROC_ACCESS, ap->a_p, ap->a_cred); 340 nfsm_postop_attr(vp, attrflag); 341 if (!error) { 342 nfsm_dissect(tl, u_long *, NFSX_UNSIGNED); 343 rmode = fxdr_unsigned(u_long, *tl); 344 /* 345 * The NFS V3 spec does not clarify whether or not 346 * the returned access bits can be a superset of 347 * the ones requested, so... 348 */ 349 if ((rmode & mode) != mode) 350 error = EACCES; 351 } 352 nfsm_reqdone; 353 return (error); 354 } else 355 return (nfsspec_access(ap)); 356 } 357 358 /* 359 * nfs open vnode op 360 * Check to see if the type is ok 361 * and that deletion is not in progress. 362 * For paged in text files, you will need to flush the page cache 363 * if consistency is lost. 364 */ 365 /* ARGSUSED */ 366 int 367 nfs_open(ap) 368 struct vop_open_args /* { 369 struct vnode *a_vp; 370 int a_mode; 371 struct ucred *a_cred; 372 struct proc *a_p; 373 } */ *ap; 374 { 375 register struct vnode *vp = ap->a_vp; 376 struct nfsnode *np = VTONFS(vp); 377 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 378 struct vattr vattr; 379 int error; 380 381 if (vp->v_type != VREG && vp->v_type != VDIR && vp->v_type != VLNK) 382 { printf("open eacces vtyp=%d\n",vp->v_type); 383 return (EACCES); 384 } 385 /* 386 * Get a valid lease. If cached data is stale, flush it. 387 */ 388 if (nmp->nm_flag & NFSMNT_NQNFS) { 389 if (NQNFS_CKINVALID(vp, np, ND_READ)) { 390 do { 391 error = nqnfs_getlease(vp, ND_READ, ap->a_cred, 392 ap->a_p); 393 } while (error == NQNFS_EXPIRED); 394 if (error) 395 return (error); 396 if (np->n_lrev != np->n_brev || 397 (np->n_flag & NQNFSNONCACHE)) { 398 if ((error = nfs_vinvalbuf(vp, V_SAVE, ap->a_cred, 399 ap->a_p, 1)) == EINTR) 400 return (error); 401 (void) vnode_pager_uncache(vp); 402 np->n_brev = np->n_lrev; 403 } 404 } 405 } else { 406 if (np->n_flag & NMODIFIED) { 407 if ((error = nfs_vinvalbuf(vp, V_SAVE, ap->a_cred, 408 ap->a_p, 1)) == EINTR) 409 return (error); 410 (void) vnode_pager_uncache(vp); 411 np->n_attrstamp = 0; 412 if (vp->v_type == VDIR) 413 np->n_direofoffset = 0; 414 error = VOP_GETATTR(vp, &vattr, ap->a_cred, ap->a_p); 415 if (error) 416 return (error); 417 np->n_mtime = vattr.va_mtime.ts_sec; 418 } else { 419 error = VOP_GETATTR(vp, &vattr, ap->a_cred, ap->a_p); 420 if (error) 421 return (error); 422 if (np->n_mtime != vattr.va_mtime.ts_sec) { 423 if (vp->v_type == VDIR) 424 np->n_direofoffset = 0; 425 if ((error = nfs_vinvalbuf(vp, V_SAVE, 426 ap->a_cred, ap->a_p, 1)) == EINTR) 427 return (error); 428 (void) vnode_pager_uncache(vp); 429 np->n_mtime = vattr.va_mtime.ts_sec; 430 } 431 } 432 } 433 if ((nmp->nm_flag & NFSMNT_NQNFS) == 0) 434 np->n_attrstamp = 0; /* For Open/Close consistency */ 435 return (0); 436 } 437 438 /* 439 * nfs close vnode op 440 * What an NFS client should do upon close after writing is a debatable issue. 441 * Most NFS clients push delayed writes to the server upon close, basically for 442 * two reasons: 443 * 1 - So that any write errors may be reported back to the client process 444 * doing the close system call. By far the two most likely errors are 445 * NFSERR_NOSPC and NFSERR_DQUOT to indicate space allocation failure. 446 * 2 - To put a worst case upper bound on cache inconsistency between 447 * multiple clients for the file. 448 * There is also a consistency problem for Version 2 of the protocol w.r.t. 449 * not being able to tell if other clients are writing a file concurrently, 450 * since there is no way of knowing if the changed modify time in the reply 451 * is only due to the write for this client. 452 * (NFS Version 3 provides weak cache consistency data in the reply that 453 * should be sufficient to detect and handle this case.) 454 * 455 * The current code does the following: 456 * for NFS Version 2 - play it safe and flush/invalidate all dirty buffers 457 * for NFS Version 3 - flush dirty buffers to the server but don't invalidate 458 * or commit them (this satisfies 1 and 2 except for the 459 * case where the server crashes after this close but 460 * before the commit RPC, which is felt to be "good 461 * enough". Changing the last argument to nfs_flush() to 462 * a 1 would force a commit operation, if it is felt a 463 * commit is necessary now. 464 * for NQNFS - do nothing now, since 2 is dealt with via leases and 465 * 1 should be dealt with via an fsync() system call for 466 * cases where write errors are important. 467 */ 468 /* ARGSUSED */ 469 int 470 nfs_close(ap) 471 struct vop_close_args /* { 472 struct vnodeop_desc *a_desc; 473 struct vnode *a_vp; 474 int a_fflag; 475 struct ucred *a_cred; 476 struct proc *a_p; 477 } */ *ap; 478 { 479 register struct vnode *vp = ap->a_vp; 480 register struct nfsnode *np = VTONFS(vp); 481 int error = 0; 482 483 if (vp->v_type == VREG) { 484 if ((VFSTONFS(vp->v_mount)->nm_flag & NFSMNT_NQNFS) == 0 && 485 (np->n_flag & NMODIFIED)) { 486 if (NFS_ISV3(vp)) { 487 error = nfs_flush(vp, ap->a_cred, MNT_WAIT, ap->a_p, 0); 488 np->n_flag &= ~NMODIFIED; 489 } else 490 error = nfs_vinvalbuf(vp, V_SAVE, ap->a_cred, ap->a_p, 1); 491 np->n_attrstamp = 0; 492 } 493 if (np->n_flag & NWRITEERR) { 494 np->n_flag &= ~NWRITEERR; 495 error = np->n_error; 496 } 497 } 498 return (error); 499 } 500 501 /* 502 * nfs getattr call from vfs. 503 */ 504 int 505 nfs_getattr(ap) 506 struct vop_getattr_args /* { 507 struct vnode *a_vp; 508 struct vattr *a_vap; 509 struct ucred *a_cred; 510 struct proc *a_p; 511 } */ *ap; 512 { 513 register struct vnode *vp = ap->a_vp; 514 register struct nfsnode *np = VTONFS(vp); 515 register caddr_t cp; 516 register u_long *tl; 517 register int t1, t2; 518 caddr_t bpos, dpos; 519 int error = 0; 520 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 521 int v3 = NFS_ISV3(vp); 522 523 /* 524 * Update local times for special files. 525 */ 526 if (np->n_flag & (NACC | NUPD)) 527 np->n_flag |= NCHG; 528 /* 529 * First look in the cache. 530 */ 531 if (nfs_getattrcache(vp, ap->a_vap) == 0) 532 return (0); 533 nfsstats.rpccnt[NFSPROC_GETATTR]++; 534 nfsm_reqhead(vp, NFSPROC_GETATTR, NFSX_FH(v3)); 535 nfsm_fhtom(vp, v3); 536 nfsm_request(vp, NFSPROC_GETATTR, ap->a_p, ap->a_cred); 537 if (!error) 538 nfsm_loadattr(vp, ap->a_vap); 539 nfsm_reqdone; 540 return (error); 541 } 542 543 /* 544 * nfs setattr call. 545 */ 546 int 547 nfs_setattr(ap) 548 struct vop_setattr_args /* { 549 struct vnodeop_desc *a_desc; 550 struct vnode *a_vp; 551 struct vattr *a_vap; 552 struct ucred *a_cred; 553 struct proc *a_p; 554 } */ *ap; 555 { 556 register struct vnode *vp = ap->a_vp; 557 register struct nfsnode *np = VTONFS(vp); 558 register struct vattr *vap = ap->a_vap; 559 int error = 0; 560 u_quad_t tsize; 561 562 #ifndef nolint 563 tsize = (u_quad_t)0; 564 #endif 565 /* 566 * Disallow write attempts if the filesystem is mounted read-only. 567 */ 568 if ((vap->va_flags != VNOVAL || vap->va_uid != (uid_t)VNOVAL || 569 vap->va_gid != (gid_t)VNOVAL || vap->va_atime.ts_sec != VNOVAL || 570 vap->va_mtime.ts_sec != VNOVAL || vap->va_mode != (mode_t)VNOVAL) && 571 (vp->v_mount->mnt_flag & MNT_RDONLY)) 572 return (EROFS); 573 if (vap->va_size != VNOVAL) { 574 switch (vp->v_type) { 575 case VDIR: 576 return (EISDIR); 577 case VCHR: 578 case VBLK: 579 case VSOCK: 580 case VFIFO: 581 if (vap->va_mtime.ts_sec == VNOVAL && 582 vap->va_atime.ts_sec == VNOVAL && 583 vap->va_mode == (u_short)VNOVAL && 584 vap->va_uid == (uid_t)VNOVAL && 585 vap->va_gid == (gid_t)VNOVAL) 586 return (0); 587 vap->va_size = VNOVAL; 588 break; 589 default: 590 /* 591 * Disallow write attempts if the filesystem is 592 * mounted read-only. 593 */ 594 if (vp->v_mount->mnt_flag & MNT_RDONLY) 595 return (EROFS); 596 if (vap->va_size == 0) 597 error = nfs_vinvalbuf(vp, 0, 598 ap->a_cred, ap->a_p, 1); 599 else 600 error = nfs_vinvalbuf(vp, V_SAVE, 601 ap->a_cred, ap->a_p, 1); 602 if (error) 603 return (error); 604 tsize = np->n_size; 605 np->n_size = np->n_vattr.va_size = vap->va_size; 606 vnode_pager_setsize(vp, (u_long)np->n_size); 607 }; 608 } else if ((vap->va_mtime.ts_sec != VNOVAL || 609 vap->va_atime.ts_sec != VNOVAL) && 610 vp->v_type == VREG && 611 (error = nfs_vinvalbuf(vp, V_SAVE, ap->a_cred, 612 ap->a_p, 1)) == EINTR) 613 return (error); 614 error = nfs_setattrrpc(vp, vap, ap->a_cred, ap->a_p); 615 if (error && vap->va_size != VNOVAL) { 616 np->n_size = np->n_vattr.va_size = tsize; 617 vnode_pager_setsize(vp, (u_long)np->n_size); 618 } 619 return (error); 620 } 621 622 /* 623 * Do an nfs setattr rpc. 624 */ 625 int 626 nfs_setattrrpc(vp, vap, cred, procp) 627 register struct vnode *vp; 628 register struct vattr *vap; 629 struct ucred *cred; 630 struct proc *procp; 631 { 632 register struct nfsv2_sattr *sp; 633 register caddr_t cp; 634 register long t1, t2; 635 caddr_t bpos, dpos, cp2; 636 u_long *tl; 637 int error = 0, wccflag = NFSV3_WCCRATTR; 638 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 639 u_quad_t frev; 640 int v3 = NFS_ISV3(vp); 641 642 nfsstats.rpccnt[NFSPROC_SETATTR]++; 643 nfsm_reqhead(vp, NFSPROC_SETATTR, NFSX_FH(v3) + NFSX_SATTR(v3)); 644 nfsm_fhtom(vp, v3); 645 if (v3) { 646 if (vap->va_mode != (u_short)VNOVAL) { 647 nfsm_build(tl, u_long *, 2 * NFSX_UNSIGNED); 648 *tl++ = nfs_true; 649 *tl = txdr_unsigned(vap->va_mode); 650 } else { 651 nfsm_build(tl, u_long *, NFSX_UNSIGNED); 652 *tl = nfs_false; 653 } 654 if (vap->va_uid != (uid_t)VNOVAL) { 655 nfsm_build(tl, u_long *, 2 * NFSX_UNSIGNED); 656 *tl++ = nfs_true; 657 *tl = txdr_unsigned(vap->va_uid); 658 } else { 659 nfsm_build(tl, u_long *, NFSX_UNSIGNED); 660 *tl = nfs_false; 661 } 662 if (vap->va_gid != (gid_t)VNOVAL) { 663 nfsm_build(tl, u_long *, 2 * NFSX_UNSIGNED); 664 *tl++ = nfs_true; 665 *tl = txdr_unsigned(vap->va_gid); 666 } else { 667 nfsm_build(tl, u_long *, NFSX_UNSIGNED); 668 *tl = nfs_false; 669 } 670 if (vap->va_size != VNOVAL) { 671 nfsm_build(tl, u_long *, 3 * NFSX_UNSIGNED); 672 *tl++ = nfs_true; 673 txdr_hyper(&vap->va_size, tl); 674 } else { 675 nfsm_build(tl, u_long *, NFSX_UNSIGNED); 676 *tl = nfs_false; 677 } 678 if (vap->va_atime.ts_sec != VNOVAL) { 679 if (vap->va_atime.ts_sec != time.tv_sec) { 680 nfsm_build(tl, u_long *, 3 * NFSX_UNSIGNED); 681 *tl++ = txdr_unsigned(NFSV3SATTRTIME_TOCLIENT); 682 txdr_nfsv3time(&vap->va_atime, tl); 683 } else { 684 nfsm_build(tl, u_long *, NFSX_UNSIGNED); 685 *tl = txdr_unsigned(NFSV3SATTRTIME_TOSERVER); 686 } 687 } else { 688 nfsm_build(tl, u_long *, NFSX_UNSIGNED); 689 *tl = txdr_unsigned(NFSV3SATTRTIME_DONTCHANGE); 690 } 691 if (vap->va_mtime.ts_sec != VNOVAL) { 692 if (vap->va_mtime.ts_sec != time.tv_sec) { 693 nfsm_build(tl, u_long *, 3 * NFSX_UNSIGNED); 694 *tl++ = txdr_unsigned(NFSV3SATTRTIME_TOCLIENT); 695 txdr_nfsv3time(&vap->va_atime, tl); 696 } else { 697 nfsm_build(tl, u_long *, NFSX_UNSIGNED); 698 *tl = txdr_unsigned(NFSV3SATTRTIME_TOSERVER); 699 } 700 } else { 701 nfsm_build(tl, u_long *, NFSX_UNSIGNED); 702 *tl = txdr_unsigned(NFSV3SATTRTIME_DONTCHANGE); 703 } 704 nfsm_build(tl, u_long *, NFSX_UNSIGNED); 705 *tl = nfs_false; 706 } else { 707 nfsm_build(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 708 if (vap->va_mode == (u_short)VNOVAL) 709 sp->sa_mode = VNOVAL; 710 else 711 sp->sa_mode = vtonfsv2_mode(vp->v_type, vap->va_mode); 712 if (vap->va_uid == (uid_t)VNOVAL) 713 sp->sa_uid = VNOVAL; 714 else 715 sp->sa_uid = txdr_unsigned(vap->va_uid); 716 if (vap->va_gid == (gid_t)VNOVAL) 717 sp->sa_gid = VNOVAL; 718 else 719 sp->sa_gid = txdr_unsigned(vap->va_gid); 720 sp->sa_size = txdr_unsigned(vap->va_size); 721 txdr_nfsv2time(&vap->va_atime, &sp->sa_atime); 722 txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime); 723 } 724 nfsm_request(vp, NFSPROC_SETATTR, procp, cred); 725 if (v3) { 726 nfsm_wcc_data(vp, wccflag); 727 } else 728 nfsm_loadattr(vp, (struct vattr *)0); 729 nfsm_reqdone; 730 return (error); 731 } 732 733 /* 734 * nfs lookup call, one step at a time... 735 * First look in cache 736 * If not found, unlock the directory nfsnode and do the rpc 737 */ 738 int 739 nfs_lookup(ap) 740 struct vop_lookup_args /* { 741 struct vnodeop_desc *a_desc; 742 struct vnode *a_dvp; 743 struct vnode **a_vpp; 744 struct componentname *a_cnp; 745 } */ *ap; 746 { 747 register struct componentname *cnp = ap->a_cnp; 748 register struct vnode *dvp = ap->a_dvp; 749 register struct vnode **vpp = ap->a_vpp; 750 register int flags = cnp->cn_flags; 751 register struct proc *p = cnp->cn_proc; 752 register struct vnode *newvp; 753 register u_long *tl; 754 register caddr_t cp; 755 register long t1, t2; 756 struct nfsmount *nmp; 757 caddr_t bpos, dpos, cp2; 758 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 759 long len; 760 nfsfh_t *fhp; 761 struct nfsnode *np; 762 int lockparent, wantparent, error = 0, attrflag, fhsize; 763 int v3 = NFS_ISV3(dvp); 764 765 if ((flags & ISLASTCN) && (dvp->v_mount->mnt_flag & MNT_RDONLY) && 766 (cnp->cn_nameiop == DELETE || cnp->cn_nameiop == RENAME)) 767 return (EROFS); 768 *vpp = NULLVP; 769 if (dvp->v_type != VDIR) 770 return (ENOTDIR); 771 lockparent = flags & LOCKPARENT; 772 wantparent = flags & (LOCKPARENT|WANTPARENT); 773 nmp = VFSTONFS(dvp->v_mount); 774 np = VTONFS(dvp); 775 if ((error = cache_lookup(dvp, vpp, cnp)) && error != ENOENT) { 776 struct vattr vattr; 777 int vpid; 778 779 newvp = *vpp; 780 vpid = newvp->v_id; 781 /* 782 * See the comment starting `Step through' in ufs/ufs_lookup.c 783 * for an explanation of the locking protocol 784 */ 785 if (dvp == newvp) { 786 VREF(newvp); 787 error = 0; 788 } else 789 error = vget(newvp, LK_EXCLUSIVE, p); 790 if (!error) { 791 if (vpid == newvp->v_id) { 792 if (!VOP_GETATTR(newvp, &vattr, cnp->cn_cred, cnp->cn_proc) 793 && vattr.va_ctime.ts_sec == VTONFS(newvp)->n_ctime) { 794 nfsstats.lookupcache_hits++; 795 if (cnp->cn_nameiop != LOOKUP && 796 (flags & ISLASTCN)) 797 cnp->cn_flags |= SAVENAME; 798 return (0); 799 } 800 cache_purge(newvp); 801 } 802 vrele(newvp); 803 } 804 *vpp = NULLVP; 805 } 806 error = 0; 807 newvp = NULLVP; 808 nfsstats.lookupcache_misses++; 809 nfsstats.rpccnt[NFSPROC_LOOKUP]++; 810 len = cnp->cn_namelen; 811 nfsm_reqhead(dvp, NFSPROC_LOOKUP, 812 NFSX_FH(v3) + NFSX_UNSIGNED + nfsm_rndup(len)); 813 nfsm_fhtom(dvp, v3); 814 nfsm_strtom(cnp->cn_nameptr, len, NFS_MAXNAMLEN); 815 nfsm_request(dvp, NFSPROC_LOOKUP, cnp->cn_proc, cnp->cn_cred); 816 if (error) { 817 nfsm_postop_attr(dvp, attrflag); 818 m_freem(mrep); 819 goto nfsmout; 820 } 821 nfsm_getfh(fhp, fhsize, v3); 822 823 /* 824 * Handle RENAME case... 825 */ 826 if (cnp->cn_nameiop == RENAME && wantparent && (flags & ISLASTCN)) { 827 if (NFS_CMPFH(np, fhp, fhsize)) { 828 m_freem(mrep); 829 return (EISDIR); 830 } 831 if (error = nfs_nget(dvp->v_mount, fhp, fhsize, &np)) { 832 m_freem(mrep); 833 return (error); 834 } 835 newvp = NFSTOV(np); 836 if (v3) { 837 nfsm_postop_attr(newvp, attrflag); 838 nfsm_postop_attr(dvp, attrflag); 839 } else 840 nfsm_loadattr(newvp, (struct vattr *)0); 841 *vpp = newvp; 842 m_freem(mrep); 843 cnp->cn_flags |= SAVENAME; 844 return (0); 845 } 846 847 if (NFS_CMPFH(np, fhp, fhsize)) { 848 VREF(dvp); 849 newvp = dvp; 850 } else { 851 if (error = nfs_nget(dvp->v_mount, fhp, fhsize, &np)) { 852 m_freem(mrep); 853 return (error); 854 } 855 newvp = NFSTOV(np); 856 } 857 if (v3) { 858 nfsm_postop_attr(newvp, attrflag); 859 nfsm_postop_attr(dvp, attrflag); 860 } else 861 nfsm_loadattr(newvp, (struct vattr *)0); 862 if (cnp->cn_nameiop != LOOKUP && (flags & ISLASTCN)) 863 cnp->cn_flags |= SAVENAME; 864 if ((cnp->cn_flags & MAKEENTRY) && 865 (cnp->cn_nameiop != DELETE || !(flags & ISLASTCN))) { 866 np->n_ctime = np->n_vattr.va_ctime.ts_sec; 867 cache_enter(dvp, newvp, cnp); 868 } 869 *vpp = newvp; 870 nfsm_reqdone; 871 if (error) { 872 if (newvp != NULLVP) 873 vrele(newvp); 874 if ((cnp->cn_nameiop == CREATE || cnp->cn_nameiop == RENAME) && 875 (flags & ISLASTCN) && error == ENOENT) { 876 if (dvp->v_mount->mnt_flag & MNT_RDONLY) 877 error = EROFS; 878 else 879 error = EJUSTRETURN; 880 } 881 if (cnp->cn_nameiop != LOOKUP && (flags & ISLASTCN)) 882 cnp->cn_flags |= SAVENAME; 883 } 884 return (error); 885 } 886 887 /* 888 * nfs read call. 889 * Just call nfs_bioread() to do the work. 890 */ 891 int 892 nfs_read(ap) 893 struct vop_read_args /* { 894 struct vnode *a_vp; 895 struct uio *a_uio; 896 int a_ioflag; 897 struct ucred *a_cred; 898 } */ *ap; 899 { 900 register struct vnode *vp = ap->a_vp; 901 902 if (vp->v_type != VREG) 903 return (EPERM); 904 return (nfs_bioread(vp, ap->a_uio, ap->a_ioflag, ap->a_cred)); 905 } 906 907 /* 908 * nfs readlink call 909 */ 910 int 911 nfs_readlink(ap) 912 struct vop_readlink_args /* { 913 struct vnode *a_vp; 914 struct uio *a_uio; 915 struct ucred *a_cred; 916 } */ *ap; 917 { 918 register struct vnode *vp = ap->a_vp; 919 920 if (vp->v_type != VLNK) 921 return (EPERM); 922 return (nfs_bioread(vp, ap->a_uio, 0, ap->a_cred)); 923 } 924 925 /* 926 * Do a readlink rpc. 927 * Called by nfs_doio() from below the buffer cache. 928 */ 929 int 930 nfs_readlinkrpc(vp, uiop, cred) 931 register struct vnode *vp; 932 struct uio *uiop; 933 struct ucred *cred; 934 { 935 register u_long *tl; 936 register caddr_t cp; 937 register long t1, t2; 938 caddr_t bpos, dpos, cp2; 939 int error = 0, len, attrflag; 940 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 941 int v3 = NFS_ISV3(vp); 942 943 nfsstats.rpccnt[NFSPROC_READLINK]++; 944 nfsm_reqhead(vp, NFSPROC_READLINK, NFSX_FH(v3)); 945 nfsm_fhtom(vp, v3); 946 nfsm_request(vp, NFSPROC_READLINK, uiop->uio_procp, cred); 947 if (v3) 948 nfsm_postop_attr(vp, attrflag); 949 if (!error) { 950 nfsm_strsiz(len, NFS_MAXPATHLEN); 951 nfsm_mtouio(uiop, len); 952 } 953 nfsm_reqdone; 954 return (error); 955 } 956 957 /* 958 * nfs read rpc call 959 * Ditto above 960 */ 961 int 962 nfs_readrpc(vp, uiop, cred) 963 register struct vnode *vp; 964 struct uio *uiop; 965 struct ucred *cred; 966 { 967 register u_long *tl; 968 register caddr_t cp; 969 register long t1, t2; 970 caddr_t bpos, dpos, cp2; 971 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 972 struct nfsmount *nmp; 973 int error = 0, len, retlen, tsiz, eof, attrflag; 974 int v3 = NFS_ISV3(vp); 975 976 #ifndef nolint 977 eof = 0; 978 #endif 979 nmp = VFSTONFS(vp->v_mount); 980 tsiz = uiop->uio_resid; 981 if (uiop->uio_offset + tsiz > 0xffffffff && !v3) 982 return (EFBIG); 983 while (tsiz > 0) { 984 nfsstats.rpccnt[NFSPROC_READ]++; 985 len = (tsiz > nmp->nm_rsize) ? nmp->nm_rsize : tsiz; 986 nfsm_reqhead(vp, NFSPROC_READ, NFSX_FH(v3) + NFSX_UNSIGNED * 3); 987 nfsm_fhtom(vp, v3); 988 nfsm_build(tl, u_long *, NFSX_UNSIGNED * 3); 989 if (v3) { 990 txdr_hyper(&uiop->uio_offset, tl); 991 *(tl + 2) = txdr_unsigned(len); 992 } else { 993 *tl++ = txdr_unsigned(uiop->uio_offset); 994 *tl++ = txdr_unsigned(len); 995 *tl = 0; 996 } 997 nfsm_request(vp, NFSPROC_READ, uiop->uio_procp, cred); 998 if (v3) { 999 nfsm_postop_attr(vp, attrflag); 1000 if (error) { 1001 m_freem(mrep); 1002 goto nfsmout; 1003 } 1004 nfsm_dissect(tl, u_long *, 2 * NFSX_UNSIGNED); 1005 eof = fxdr_unsigned(int, *(tl + 1)); 1006 } else 1007 nfsm_loadattr(vp, (struct vattr *)0); 1008 nfsm_strsiz(retlen, nmp->nm_rsize); 1009 nfsm_mtouio(uiop, retlen); 1010 m_freem(mrep); 1011 tsiz -= retlen; 1012 if (v3) { 1013 if (eof || retlen == 0) 1014 tsiz = 0; 1015 } else if (retlen < len) 1016 tsiz = 0; 1017 } 1018 nfsmout: 1019 return (error); 1020 } 1021 1022 /* 1023 * nfs write call 1024 */ 1025 int 1026 nfs_writerpc(vp, uiop, cred, iomode, must_commit) 1027 register struct vnode *vp; 1028 register struct uio *uiop; 1029 struct ucred *cred; 1030 int *iomode, *must_commit; 1031 { 1032 register u_long *tl; 1033 register caddr_t cp; 1034 register int t1, t2, backup; 1035 caddr_t bpos, dpos, cp2; 1036 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 1037 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 1038 struct nfsnode *np = VTONFS(vp); 1039 u_quad_t frev; 1040 int error = 0, len, tsiz, wccflag = NFSV3_WCCRATTR, rlen, commit; 1041 int v3 = NFS_ISV3(vp), committed = NFSV3WRITE_FILESYNC; 1042 1043 #ifndef DIAGNOSTIC 1044 if (uiop->uio_iovcnt != 1) 1045 panic("nfs: writerpc iovcnt > 1"); 1046 #endif 1047 *must_commit = 0; 1048 tsiz = uiop->uio_resid; 1049 if (uiop->uio_offset + tsiz > 0xffffffff && !v3) 1050 return (EFBIG); 1051 while (tsiz > 0) { 1052 nfsstats.rpccnt[NFSPROC_WRITE]++; 1053 len = (tsiz > nmp->nm_wsize) ? nmp->nm_wsize : tsiz; 1054 nfsm_reqhead(vp, NFSPROC_WRITE, 1055 NFSX_FH(v3) + 5 * NFSX_UNSIGNED + nfsm_rndup(len)); 1056 nfsm_fhtom(vp, v3); 1057 if (v3) { 1058 nfsm_build(tl, u_long *, 5 * NFSX_UNSIGNED); 1059 txdr_hyper(&uiop->uio_offset, tl); 1060 tl += 2; 1061 *tl++ = txdr_unsigned(len); 1062 *tl++ = txdr_unsigned(*iomode); 1063 } else { 1064 nfsm_build(tl, u_long *, 4 * NFSX_UNSIGNED); 1065 *++tl = txdr_unsigned(uiop->uio_offset); 1066 tl += 2; 1067 } 1068 *tl = txdr_unsigned(len); 1069 nfsm_uiotom(uiop, len); 1070 nfsm_request(vp, NFSPROC_WRITE, uiop->uio_procp, cred); 1071 if (v3) { 1072 wccflag = NFSV3_WCCCHK; 1073 nfsm_wcc_data(vp, wccflag); 1074 if (!error) { 1075 nfsm_dissect(tl, u_long *, 2 * NFSX_UNSIGNED + 1076 NFSX_V3WRITEVERF); 1077 rlen = fxdr_unsigned(int, *tl++); 1078 if (rlen == 0) { 1079 error = NFSERR_IO; 1080 break; 1081 } else if (rlen < len) { 1082 backup = len - rlen; 1083 uiop->uio_iov->iov_base -= backup; 1084 uiop->uio_iov->iov_len += backup; 1085 uiop->uio_offset -= backup; 1086 uiop->uio_resid += backup; 1087 len = rlen; 1088 } 1089 commit = fxdr_unsigned(int, *tl++); 1090 1091 /* 1092 * Return the lowest committment level 1093 * obtained by any of the RPCs. 1094 */ 1095 if (committed == NFSV3WRITE_FILESYNC) 1096 committed = commit; 1097 else if (committed == NFSV3WRITE_DATASYNC && 1098 commit == NFSV3WRITE_UNSTABLE) 1099 committed = commit; 1100 if ((nmp->nm_flag & NFSMNT_HASWRITEVERF) == 0) { 1101 bcopy((caddr_t)tl, (caddr_t)nmp->nm_verf, 1102 NFSX_V3WRITEVERF); 1103 nmp->nm_flag |= NFSMNT_HASWRITEVERF; 1104 } else if (bcmp((caddr_t)tl, 1105 (caddr_t)nmp->nm_verf, NFSX_V3WRITEVERF)) { 1106 *must_commit = 1; 1107 bcopy((caddr_t)tl, (caddr_t)nmp->nm_verf, 1108 NFSX_V3WRITEVERF); 1109 } 1110 } 1111 } else 1112 nfsm_loadattr(vp, (struct vattr *)0); 1113 if (wccflag) 1114 VTONFS(vp)->n_mtime = VTONFS(vp)->n_vattr.va_mtime.ts_sec; 1115 m_freem(mrep); 1116 tsiz -= len; 1117 } 1118 nfsmout: 1119 *iomode = committed; 1120 if (error) 1121 uiop->uio_resid = tsiz; 1122 return (error); 1123 } 1124 1125 /* 1126 * nfs mknod rpc 1127 * For NFS v2 this is a kludge. Use a create rpc but with the IFMT bits of the 1128 * mode set to specify the file type and the size field for rdev. 1129 */ 1130 int 1131 nfs_mknodrpc(dvp, vpp, cnp, vap) 1132 register struct vnode *dvp; 1133 register struct vnode **vpp; 1134 register struct componentname *cnp; 1135 register struct vattr *vap; 1136 { 1137 register struct nfsv2_sattr *sp; 1138 register struct nfsv3_sattr *sp3; 1139 register u_long *tl; 1140 register caddr_t cp; 1141 register long t1, t2; 1142 struct vnode *newvp = (struct vnode *)0; 1143 struct nfsnode *np; 1144 struct vattr vattr; 1145 char *cp2; 1146 caddr_t bpos, dpos; 1147 int error = 0, wccflag = NFSV3_WCCRATTR, gotvp = 0; 1148 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 1149 u_long rdev; 1150 int v3 = NFS_ISV3(dvp); 1151 1152 if (vap->va_type == VCHR || vap->va_type == VBLK) 1153 rdev = txdr_unsigned(vap->va_rdev); 1154 else if (vap->va_type == VFIFO || vap->va_type == VSOCK) 1155 rdev = 0xffffffff; 1156 else { 1157 VOP_ABORTOP(dvp, cnp); 1158 vput(dvp); 1159 return (EOPNOTSUPP); 1160 } 1161 if (error = VOP_GETATTR(dvp, &vattr, cnp->cn_cred, cnp->cn_proc)) { 1162 VOP_ABORTOP(dvp, cnp); 1163 vput(dvp); 1164 return (error); 1165 } 1166 nfsstats.rpccnt[NFSPROC_MKNOD]++; 1167 nfsm_reqhead(dvp, NFSPROC_MKNOD, NFSX_FH(v3) + 4 * NFSX_UNSIGNED + 1168 + nfsm_rndup(cnp->cn_namelen) + NFSX_SATTR(v3)); 1169 nfsm_fhtom(dvp, v3); 1170 nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN); 1171 if (v3) { 1172 nfsm_build(tl, u_long *, NFSX_UNSIGNED + NFSX_V3SRVSATTR); 1173 *tl++ = vtonfsv3_type(vap->va_type); 1174 sp3 = (struct nfsv3_sattr *)tl; 1175 nfsm_v3sattr(sp3, vap, cnp->cn_cred->cr_uid, vattr.va_gid); 1176 if (vap->va_type == VCHR || vap->va_type == VBLK) { 1177 nfsm_build(tl, u_long *, 2 * NFSX_UNSIGNED); 1178 *tl++ = txdr_unsigned(major(vap->va_rdev)); 1179 *tl = txdr_unsigned(minor(vap->va_rdev)); 1180 } 1181 } else { 1182 nfsm_build(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 1183 sp->sa_mode = vtonfsv2_mode(vap->va_type, vap->va_mode); 1184 sp->sa_uid = txdr_unsigned(cnp->cn_cred->cr_uid); 1185 sp->sa_gid = txdr_unsigned(vattr.va_gid); 1186 sp->sa_size = rdev; 1187 txdr_nfsv2time(&vap->va_atime, &sp->sa_atime); 1188 txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime); 1189 } 1190 nfsm_request(dvp, NFSPROC_MKNOD, cnp->cn_proc, cnp->cn_cred); 1191 if (!error) { 1192 nfsm_mtofh(dvp, newvp, v3, gotvp); 1193 if (!gotvp) { 1194 if (newvp) { 1195 vrele(newvp); 1196 newvp = (struct vnode *)0; 1197 } 1198 error = nfs_lookitup(dvp, cnp->cn_nameptr, 1199 cnp->cn_namelen, cnp->cn_cred, cnp->cn_proc, &np); 1200 if (!error) 1201 newvp = NFSTOV(np); 1202 } 1203 } 1204 if (v3) 1205 nfsm_wcc_data(dvp, wccflag); 1206 nfsm_reqdone; 1207 if (error) { 1208 if (newvp) 1209 vrele(newvp); 1210 } else { 1211 if (cnp->cn_flags & MAKEENTRY) 1212 cache_enter(dvp, newvp, cnp); 1213 *vpp = newvp; 1214 } 1215 FREE(cnp->cn_pnbuf, M_NAMEI); 1216 VTONFS(dvp)->n_flag |= NMODIFIED; 1217 if (!wccflag) 1218 VTONFS(dvp)->n_attrstamp = 0; 1219 vrele(dvp); 1220 return (error); 1221 } 1222 1223 /* 1224 * nfs mknod vop 1225 * just call nfs_mknodrpc() to do the work. 1226 */ 1227 /* ARGSUSED */ 1228 int 1229 nfs_mknod(ap) 1230 struct vop_mknod_args /* { 1231 struct vnode *a_dvp; 1232 struct vnode **a_vpp; 1233 struct componentname *a_cnp; 1234 struct vattr *a_vap; 1235 } */ *ap; 1236 { 1237 struct vnode *newvp; 1238 int error; 1239 1240 error = nfs_mknodrpc(ap->a_dvp, &newvp, ap->a_cnp, ap->a_vap); 1241 if (!error) 1242 vrele(newvp); 1243 return (error); 1244 } 1245 1246 static u_long create_verf; 1247 /* 1248 * nfs file create call 1249 */ 1250 int 1251 nfs_create(ap) 1252 struct vop_create_args /* { 1253 struct vnode *a_dvp; 1254 struct vnode **a_vpp; 1255 struct componentname *a_cnp; 1256 struct vattr *a_vap; 1257 } */ *ap; 1258 { 1259 register struct vnode *dvp = ap->a_dvp; 1260 register struct vattr *vap = ap->a_vap; 1261 register struct componentname *cnp = ap->a_cnp; 1262 register struct nfsv2_sattr *sp; 1263 register struct nfsv3_sattr *sp3; 1264 register u_long *tl; 1265 register caddr_t cp; 1266 register long t1, t2; 1267 struct nfsnode *np = (struct nfsnode *)0; 1268 struct vnode *newvp = (struct vnode *)0; 1269 caddr_t bpos, dpos, cp2; 1270 int error = 0, wccflag = NFSV3_WCCRATTR, gotvp = 0, fmode = 0; 1271 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 1272 struct vattr vattr; 1273 int v3 = NFS_ISV3(dvp); 1274 1275 /* 1276 * Oops, not for me.. 1277 */ 1278 if (vap->va_type == VSOCK) 1279 return (nfs_mknodrpc(dvp, ap->a_vpp, cnp, vap)); 1280 1281 if (error = VOP_GETATTR(dvp, &vattr, cnp->cn_cred, cnp->cn_proc)) { 1282 VOP_ABORTOP(dvp, cnp); 1283 vput(dvp); 1284 return (error); 1285 } 1286 if (vap->va_vaflags & VA_EXCLUSIVE) 1287 fmode |= O_EXCL; 1288 again: 1289 nfsstats.rpccnt[NFSPROC_CREATE]++; 1290 nfsm_reqhead(dvp, NFSPROC_CREATE, NFSX_FH(v3) + 2 * NFSX_UNSIGNED + 1291 nfsm_rndup(cnp->cn_namelen) + NFSX_SATTR(v3)); 1292 nfsm_fhtom(dvp, v3); 1293 nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN); 1294 if (v3) { 1295 nfsm_build(tl, u_long *, NFSX_UNSIGNED); 1296 if (fmode & O_EXCL) { 1297 *tl = txdr_unsigned(NFSV3CREATE_EXCLUSIVE); 1298 nfsm_build(tl, u_long *, NFSX_V3CREATEVERF); 1299 if (in_ifaddr) 1300 *tl++ = IA_SIN(in_ifaddr)->sin_addr.s_addr; 1301 else 1302 *tl++ = create_verf; 1303 *tl = ++create_verf; 1304 } else { 1305 *tl = txdr_unsigned(NFSV3CREATE_UNCHECKED); 1306 nfsm_build(tl, u_long *, NFSX_V3SRVSATTR); 1307 sp3 = (struct nfsv3_sattr *)tl; 1308 nfsm_v3sattr(sp3, vap, cnp->cn_cred->cr_uid, vattr.va_gid); 1309 } 1310 } else { 1311 nfsm_build(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 1312 sp->sa_mode = vtonfsv2_mode(vap->va_type, vap->va_mode); 1313 sp->sa_uid = txdr_unsigned(cnp->cn_cred->cr_uid); 1314 sp->sa_gid = txdr_unsigned(vattr.va_gid); 1315 sp->sa_size = 0; 1316 txdr_nfsv2time(&vap->va_atime, &sp->sa_atime); 1317 txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime); 1318 } 1319 nfsm_request(dvp, NFSPROC_CREATE, cnp->cn_proc, cnp->cn_cred); 1320 if (!error) { 1321 nfsm_mtofh(dvp, newvp, v3, gotvp); 1322 if (!gotvp) { 1323 if (newvp) { 1324 vrele(newvp); 1325 newvp = (struct vnode *)0; 1326 } 1327 error = nfs_lookitup(dvp, cnp->cn_nameptr, 1328 cnp->cn_namelen, cnp->cn_cred, cnp->cn_proc, &np); 1329 if (!error) 1330 newvp = NFSTOV(np); 1331 } 1332 } 1333 if (v3) 1334 nfsm_wcc_data(dvp, wccflag); 1335 nfsm_reqdone; 1336 if (error) { 1337 if (v3 && (fmode & O_EXCL) && error == NFSERR_NOTSUPP) { 1338 fmode &= ~O_EXCL; 1339 goto again; 1340 } 1341 if (newvp) 1342 vrele(newvp); 1343 } else if (v3 && (fmode & O_EXCL)) 1344 error = nfs_setattrrpc(newvp, vap, cnp->cn_cred, cnp->cn_proc); 1345 if (!error) { 1346 if (cnp->cn_flags & MAKEENTRY) 1347 cache_enter(dvp, newvp, cnp); 1348 *ap->a_vpp = newvp; 1349 } 1350 FREE(cnp->cn_pnbuf, M_NAMEI); 1351 VTONFS(dvp)->n_flag |= NMODIFIED; 1352 if (!wccflag) 1353 VTONFS(dvp)->n_attrstamp = 0; 1354 vrele(dvp); 1355 return (error); 1356 } 1357 1358 /* 1359 * nfs file remove call 1360 * To try and make nfs semantics closer to ufs semantics, a file that has 1361 * other processes using the vnode is renamed instead of removed and then 1362 * removed later on the last close. 1363 * - If v_usecount > 1 1364 * If a rename is not already in the works 1365 * call nfs_sillyrename() to set it up 1366 * else 1367 * do the remove rpc 1368 */ 1369 int 1370 nfs_remove(ap) 1371 struct vop_remove_args /* { 1372 struct vnodeop_desc *a_desc; 1373 struct vnode * a_dvp; 1374 struct vnode * a_vp; 1375 struct componentname * a_cnp; 1376 } */ *ap; 1377 { 1378 register struct vnode *vp = ap->a_vp; 1379 register struct vnode *dvp = ap->a_dvp; 1380 register struct componentname *cnp = ap->a_cnp; 1381 register struct nfsnode *np = VTONFS(vp); 1382 register u_long *tl; 1383 register caddr_t cp; 1384 register long t2; 1385 caddr_t bpos, dpos; 1386 int error = 0; 1387 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 1388 struct vattr vattr; 1389 int v3 = NFS_ISV3(dvp); 1390 1391 #ifndef DIAGNOSTIC 1392 if ((cnp->cn_flags & HASBUF) == 0) 1393 panic("nfs_remove: no name"); 1394 if (vp->v_usecount < 1) 1395 panic("nfs_remove: bad v_usecount"); 1396 #endif 1397 if (vp->v_usecount == 1 || (np->n_sillyrename && 1398 VOP_GETATTR(vp, &vattr, cnp->cn_cred, cnp->cn_proc) == 0 && 1399 vattr.va_nlink > 1)) { 1400 /* 1401 * Purge the name cache so that the chance of a lookup for 1402 * the name succeeding while the remove is in progress is 1403 * minimized. Without node locking it can still happen, such 1404 * that an I/O op returns ESTALE, but since you get this if 1405 * another host removes the file.. 1406 */ 1407 cache_purge(vp); 1408 /* 1409 * throw away biocache buffers, mainly to avoid 1410 * unnecessary delayed writes later. 1411 */ 1412 error = nfs_vinvalbuf(vp, 0, cnp->cn_cred, cnp->cn_proc, 1); 1413 /* Do the rpc */ 1414 if (error != EINTR) 1415 error = nfs_removerpc(dvp, cnp->cn_nameptr, 1416 cnp->cn_namelen, cnp->cn_cred, cnp->cn_proc); 1417 /* 1418 * Kludge City: If the first reply to the remove rpc is lost.. 1419 * the reply to the retransmitted request will be ENOENT 1420 * since the file was in fact removed 1421 * Therefore, we cheat and return success. 1422 */ 1423 if (error == ENOENT) 1424 error = 0; 1425 } else if (!np->n_sillyrename) 1426 error = nfs_sillyrename(dvp, vp, cnp); 1427 FREE(cnp->cn_pnbuf, M_NAMEI); 1428 np->n_attrstamp = 0; 1429 vrele(dvp); 1430 vrele(vp); 1431 return (error); 1432 } 1433 1434 /* 1435 * nfs file remove rpc called from nfs_inactive 1436 */ 1437 int 1438 nfs_removeit(sp) 1439 register struct sillyrename *sp; 1440 { 1441 1442 return (nfs_removerpc(sp->s_dvp, sp->s_name, sp->s_namlen, sp->s_cred, 1443 (struct proc *)0)); 1444 } 1445 1446 /* 1447 * Nfs remove rpc, called from nfs_remove() and nfs_removeit(). 1448 */ 1449 int 1450 nfs_removerpc(dvp, name, namelen, cred, proc) 1451 register struct vnode *dvp; 1452 char *name; 1453 int namelen; 1454 struct ucred *cred; 1455 struct proc *proc; 1456 { 1457 register u_long *tl; 1458 register caddr_t cp; 1459 register long t1, t2; 1460 caddr_t bpos, dpos, cp2; 1461 int error = 0, wccflag = NFSV3_WCCRATTR; 1462 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 1463 int v3 = NFS_ISV3(dvp); 1464 1465 nfsstats.rpccnt[NFSPROC_REMOVE]++; 1466 nfsm_reqhead(dvp, NFSPROC_REMOVE, 1467 NFSX_FH(v3) + NFSX_UNSIGNED + nfsm_rndup(namelen)); 1468 nfsm_fhtom(dvp, v3); 1469 nfsm_strtom(name, namelen, NFS_MAXNAMLEN); 1470 nfsm_request(dvp, NFSPROC_REMOVE, proc, cred); 1471 if (v3) 1472 nfsm_wcc_data(dvp, wccflag); 1473 nfsm_reqdone; 1474 VTONFS(dvp)->n_flag |= NMODIFIED; 1475 if (!wccflag) 1476 VTONFS(dvp)->n_attrstamp = 0; 1477 return (error); 1478 } 1479 1480 /* 1481 * nfs file rename call 1482 */ 1483 int 1484 nfs_rename(ap) 1485 struct vop_rename_args /* { 1486 struct vnode *a_fdvp; 1487 struct vnode *a_fvp; 1488 struct componentname *a_fcnp; 1489 struct vnode *a_tdvp; 1490 struct vnode *a_tvp; 1491 struct componentname *a_tcnp; 1492 } */ *ap; 1493 { 1494 register struct vnode *fvp = ap->a_fvp; 1495 register struct vnode *tvp = ap->a_tvp; 1496 register struct vnode *fdvp = ap->a_fdvp; 1497 register struct vnode *tdvp = ap->a_tdvp; 1498 register struct componentname *tcnp = ap->a_tcnp; 1499 register struct componentname *fcnp = ap->a_fcnp; 1500 int error; 1501 1502 #ifndef DIAGNOSTIC 1503 if ((tcnp->cn_flags & HASBUF) == 0 || 1504 (fcnp->cn_flags & HASBUF) == 0) 1505 panic("nfs_rename: no name"); 1506 #endif 1507 /* Check for cross-device rename */ 1508 if ((fvp->v_mount != tdvp->v_mount) || 1509 (tvp && (fvp->v_mount != tvp->v_mount))) { 1510 error = EXDEV; 1511 goto out; 1512 } 1513 1514 /* 1515 * If the tvp exists and is in use, sillyrename it before doing the 1516 * rename of the new file over it. 1517 */ 1518 if (tvp && tvp->v_usecount > 1 && !VTONFS(tvp)->n_sillyrename && 1519 !nfs_sillyrename(tdvp, tvp, tcnp)) { 1520 vrele(tvp); 1521 tvp = NULL; 1522 } 1523 1524 error = nfs_renamerpc(fdvp, fcnp->cn_nameptr, fcnp->cn_namelen, 1525 tdvp, tcnp->cn_nameptr, tcnp->cn_namelen, tcnp->cn_cred, 1526 tcnp->cn_proc); 1527 1528 if (fvp->v_type == VDIR) { 1529 if (tvp != NULL && tvp->v_type == VDIR) 1530 cache_purge(tdvp); 1531 cache_purge(fdvp); 1532 } 1533 out: 1534 if (tdvp == tvp) 1535 vrele(tdvp); 1536 else 1537 vput(tdvp); 1538 if (tvp) 1539 vput(tvp); 1540 vrele(fdvp); 1541 vrele(fvp); 1542 /* 1543 * Kludge: Map ENOENT => 0 assuming that it is a reply to a retry. 1544 */ 1545 if (error == ENOENT) 1546 error = 0; 1547 return (error); 1548 } 1549 1550 /* 1551 * nfs file rename rpc called from nfs_remove() above 1552 */ 1553 int 1554 nfs_renameit(sdvp, scnp, sp) 1555 struct vnode *sdvp; 1556 struct componentname *scnp; 1557 register struct sillyrename *sp; 1558 { 1559 return (nfs_renamerpc(sdvp, scnp->cn_nameptr, scnp->cn_namelen, 1560 sdvp, sp->s_name, sp->s_namlen, scnp->cn_cred, scnp->cn_proc)); 1561 } 1562 1563 /* 1564 * Do an nfs rename rpc. Called from nfs_rename() and nfs_renameit(). 1565 */ 1566 int 1567 nfs_renamerpc(fdvp, fnameptr, fnamelen, tdvp, tnameptr, tnamelen, cred, proc) 1568 register struct vnode *fdvp; 1569 char *fnameptr; 1570 int fnamelen; 1571 register struct vnode *tdvp; 1572 char *tnameptr; 1573 int tnamelen; 1574 struct ucred *cred; 1575 struct proc *proc; 1576 { 1577 register u_long *tl; 1578 register caddr_t cp; 1579 register long t1, t2; 1580 caddr_t bpos, dpos, cp2; 1581 int error = 0, fwccflag = NFSV3_WCCRATTR, twccflag = NFSV3_WCCRATTR; 1582 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 1583 int v3 = NFS_ISV3(fdvp); 1584 1585 nfsstats.rpccnt[NFSPROC_RENAME]++; 1586 nfsm_reqhead(fdvp, NFSPROC_RENAME, 1587 (NFSX_FH(v3) + NFSX_UNSIGNED)*2 + nfsm_rndup(fnamelen) + 1588 nfsm_rndup(tnamelen)); 1589 nfsm_fhtom(fdvp, v3); 1590 nfsm_strtom(fnameptr, fnamelen, NFS_MAXNAMLEN); 1591 nfsm_fhtom(tdvp, v3); 1592 nfsm_strtom(tnameptr, tnamelen, NFS_MAXNAMLEN); 1593 nfsm_request(fdvp, NFSPROC_RENAME, proc, cred); 1594 if (v3) { 1595 nfsm_wcc_data(fdvp, fwccflag); 1596 nfsm_wcc_data(tdvp, twccflag); 1597 } 1598 nfsm_reqdone; 1599 VTONFS(fdvp)->n_flag |= NMODIFIED; 1600 VTONFS(tdvp)->n_flag |= NMODIFIED; 1601 if (!fwccflag) 1602 VTONFS(fdvp)->n_attrstamp = 0; 1603 if (!twccflag) 1604 VTONFS(tdvp)->n_attrstamp = 0; 1605 return (error); 1606 } 1607 1608 /* 1609 * nfs hard link create call 1610 */ 1611 int 1612 nfs_link(ap) 1613 struct vop_link_args /* { 1614 struct vnode *a_tdvp; 1615 struct vnode *a_vp; 1616 struct componentname *a_cnp; 1617 } */ *ap; 1618 { 1619 register struct vnode *vp = ap->a_vp; 1620 register struct vnode *tdvp = ap->a_tdvp; 1621 register struct componentname *cnp = ap->a_cnp; 1622 register u_long *tl; 1623 register caddr_t cp; 1624 register long t1, t2; 1625 caddr_t bpos, dpos, cp2; 1626 int error = 0, wccflag = NFSV3_WCCRATTR, attrflag = 0; 1627 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 1628 int v3 = NFS_ISV3(vp); 1629 1630 if (vp->v_mount != tdvp->v_mount) { 1631 /*VOP_ABORTOP(vp, cnp);*/ 1632 if (tdvp == vp) 1633 vrele(tdvp); 1634 else 1635 vput(tdvp); 1636 return (EXDEV); 1637 } 1638 1639 /* 1640 * Push all writes to the server, so that the attribute cache 1641 * doesn't get "out of sync" with the server. 1642 * XXX There should be a better way! 1643 */ 1644 VOP_FSYNC(vp, cnp->cn_cred, MNT_WAIT, cnp->cn_proc); 1645 1646 nfsstats.rpccnt[NFSPROC_LINK]++; 1647 nfsm_reqhead(vp, NFSPROC_LINK, 1648 NFSX_FH(v3)*2 + NFSX_UNSIGNED + nfsm_rndup(cnp->cn_namelen)); 1649 nfsm_fhtom(vp, v3); 1650 nfsm_fhtom(tdvp, v3); 1651 nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN); 1652 nfsm_request(vp, NFSPROC_LINK, cnp->cn_proc, cnp->cn_cred); 1653 if (v3) { 1654 nfsm_postop_attr(vp, attrflag); 1655 nfsm_wcc_data(tdvp, wccflag); 1656 } 1657 nfsm_reqdone; 1658 FREE(cnp->cn_pnbuf, M_NAMEI); 1659 VTONFS(tdvp)->n_flag |= NMODIFIED; 1660 if (!attrflag) 1661 VTONFS(vp)->n_attrstamp = 0; 1662 if (!wccflag) 1663 VTONFS(tdvp)->n_attrstamp = 0; 1664 vrele(tdvp); 1665 /* 1666 * Kludge: Map EEXIST => 0 assuming that it is a reply to a retry. 1667 */ 1668 if (error == EEXIST) 1669 error = 0; 1670 return (error); 1671 } 1672 1673 /* 1674 * nfs symbolic link create call 1675 */ 1676 int 1677 nfs_symlink(ap) 1678 struct vop_symlink_args /* { 1679 struct vnode *a_dvp; 1680 struct vnode **a_vpp; 1681 struct componentname *a_cnp; 1682 struct vattr *a_vap; 1683 char *a_target; 1684 } */ *ap; 1685 { 1686 register struct vnode *dvp = ap->a_dvp; 1687 register struct vattr *vap = ap->a_vap; 1688 register struct componentname *cnp = ap->a_cnp; 1689 register struct nfsv2_sattr *sp; 1690 register struct nfsv3_sattr *sp3; 1691 register u_long *tl; 1692 register caddr_t cp; 1693 register long t1, t2; 1694 caddr_t bpos, dpos, cp2; 1695 int slen, error = 0, wccflag = NFSV3_WCCRATTR, gotvp; 1696 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 1697 struct vnode *newvp = (struct vnode *)0; 1698 int v3 = NFS_ISV3(dvp); 1699 1700 nfsstats.rpccnt[NFSPROC_SYMLINK]++; 1701 slen = strlen(ap->a_target); 1702 nfsm_reqhead(dvp, NFSPROC_SYMLINK, NFSX_FH(v3) + 2*NFSX_UNSIGNED + 1703 nfsm_rndup(cnp->cn_namelen) + nfsm_rndup(slen) + NFSX_SATTR(v3)); 1704 nfsm_fhtom(dvp, v3); 1705 nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN); 1706 if (v3) { 1707 nfsm_build(sp3, struct nfsv3_sattr *, NFSX_V3SRVSATTR); 1708 nfsm_v3sattr(sp3, vap, cnp->cn_cred->cr_uid, 1709 cnp->cn_cred->cr_gid); 1710 } 1711 nfsm_strtom(ap->a_target, slen, NFS_MAXPATHLEN); 1712 if (!v3) { 1713 nfsm_build(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 1714 sp->sa_mode = vtonfsv2_mode(VLNK, vap->va_mode); 1715 sp->sa_uid = txdr_unsigned(cnp->cn_cred->cr_uid); 1716 sp->sa_gid = txdr_unsigned(cnp->cn_cred->cr_gid); 1717 sp->sa_size = -1; 1718 txdr_nfsv2time(&vap->va_atime, &sp->sa_atime); 1719 txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime); 1720 } 1721 nfsm_request(dvp, NFSPROC_SYMLINK, cnp->cn_proc, cnp->cn_cred); 1722 if (v3) { 1723 if (!error) 1724 nfsm_mtofh(dvp, newvp, v3, gotvp); 1725 nfsm_wcc_data(dvp, wccflag); 1726 } 1727 nfsm_reqdone; 1728 if (newvp) 1729 vrele(newvp); 1730 FREE(cnp->cn_pnbuf, M_NAMEI); 1731 VTONFS(dvp)->n_flag |= NMODIFIED; 1732 if (!wccflag) 1733 VTONFS(dvp)->n_attrstamp = 0; 1734 vrele(dvp); 1735 /* 1736 * Kludge: Map EEXIST => 0 assuming that it is a reply to a retry. 1737 */ 1738 if (error == EEXIST) 1739 error = 0; 1740 return (error); 1741 } 1742 1743 /* 1744 * nfs make dir call 1745 */ 1746 int 1747 nfs_mkdir(ap) 1748 struct vop_mkdir_args /* { 1749 struct vnode *a_dvp; 1750 struct vnode **a_vpp; 1751 struct componentname *a_cnp; 1752 struct vattr *a_vap; 1753 } */ *ap; 1754 { 1755 register struct vnode *dvp = ap->a_dvp; 1756 register struct vattr *vap = ap->a_vap; 1757 register struct componentname *cnp = ap->a_cnp; 1758 register struct nfsv2_sattr *sp; 1759 register struct nfsv3_sattr *sp3; 1760 register u_long *tl; 1761 register caddr_t cp; 1762 register long t1, t2; 1763 register int len; 1764 struct nfsnode *np = (struct nfsnode *)0; 1765 struct vnode *newvp = (struct vnode *)0; 1766 caddr_t bpos, dpos, cp2; 1767 nfsfh_t *fhp; 1768 int error = 0, wccflag = NFSV3_WCCRATTR, attrflag; 1769 int fhsize, gotvp = 0; 1770 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 1771 struct vattr vattr; 1772 int v3 = NFS_ISV3(dvp); 1773 1774 if (error = VOP_GETATTR(dvp, &vattr, cnp->cn_cred, cnp->cn_proc)) { 1775 VOP_ABORTOP(dvp, cnp); 1776 vput(dvp); 1777 return (error); 1778 } 1779 len = cnp->cn_namelen; 1780 nfsstats.rpccnt[NFSPROC_MKDIR]++; 1781 nfsm_reqhead(dvp, NFSPROC_MKDIR, 1782 NFSX_FH(v3) + NFSX_UNSIGNED + nfsm_rndup(len) + NFSX_SATTR(v3)); 1783 nfsm_fhtom(dvp, v3); 1784 nfsm_strtom(cnp->cn_nameptr, len, NFS_MAXNAMLEN); 1785 if (v3) { 1786 nfsm_build(sp3, struct nfsv3_sattr *, NFSX_V3SRVSATTR); 1787 nfsm_v3sattr(sp3, vap, cnp->cn_cred->cr_uid, vattr.va_gid); 1788 } else { 1789 nfsm_build(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 1790 sp->sa_mode = vtonfsv2_mode(VDIR, vap->va_mode); 1791 sp->sa_uid = txdr_unsigned(cnp->cn_cred->cr_uid); 1792 sp->sa_gid = txdr_unsigned(vattr.va_gid); 1793 sp->sa_size = -1; 1794 txdr_nfsv2time(&vap->va_atime, &sp->sa_atime); 1795 txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime); 1796 } 1797 nfsm_request(dvp, NFSPROC_MKDIR, cnp->cn_proc, cnp->cn_cred); 1798 if (!error) 1799 nfsm_mtofh(dvp, newvp, v3, gotvp); 1800 if (v3) 1801 nfsm_wcc_data(dvp, wccflag); 1802 nfsm_reqdone; 1803 VTONFS(dvp)->n_flag |= NMODIFIED; 1804 if (!wccflag) 1805 VTONFS(dvp)->n_attrstamp = 0; 1806 /* 1807 * Kludge: Map EEXIST => 0 assuming that you have a reply to a retry 1808 * if we can succeed in looking up the directory. 1809 */ 1810 if (error == EEXIST || (!error && !gotvp)) { 1811 if (newvp) { 1812 vrele(newvp); 1813 newvp = (struct vnode *)0; 1814 } 1815 error = nfs_lookitup(dvp, cnp->cn_nameptr, len, cnp->cn_cred, 1816 cnp->cn_proc, &np); 1817 if (!error) { 1818 newvp = NFSTOV(np); 1819 if (newvp->v_type != VDIR) 1820 error = EEXIST; 1821 } 1822 } 1823 if (error) { 1824 if (newvp) 1825 vrele(newvp); 1826 } else 1827 *ap->a_vpp = newvp; 1828 FREE(cnp->cn_pnbuf, M_NAMEI); 1829 vrele(dvp); 1830 return (error); 1831 } 1832 1833 /* 1834 * nfs remove directory call 1835 */ 1836 int 1837 nfs_rmdir(ap) 1838 struct vop_rmdir_args /* { 1839 struct vnode *a_dvp; 1840 struct vnode *a_vp; 1841 struct componentname *a_cnp; 1842 } */ *ap; 1843 { 1844 register struct vnode *vp = ap->a_vp; 1845 register struct vnode *dvp = ap->a_dvp; 1846 register struct componentname *cnp = ap->a_cnp; 1847 register u_long *tl; 1848 register caddr_t cp; 1849 register long t1, t2; 1850 caddr_t bpos, dpos, cp2; 1851 int error = 0, wccflag = NFSV3_WCCRATTR; 1852 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 1853 int v3 = NFS_ISV3(dvp); 1854 1855 if (dvp == vp) { 1856 vrele(dvp); 1857 vrele(dvp); 1858 FREE(cnp->cn_pnbuf, M_NAMEI); 1859 return (EINVAL); 1860 } 1861 nfsstats.rpccnt[NFSPROC_RMDIR]++; 1862 nfsm_reqhead(dvp, NFSPROC_RMDIR, 1863 NFSX_FH(v3) + NFSX_UNSIGNED + nfsm_rndup(cnp->cn_namelen)); 1864 nfsm_fhtom(dvp, v3); 1865 nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN); 1866 nfsm_request(dvp, NFSPROC_RMDIR, cnp->cn_proc, cnp->cn_cred); 1867 if (v3) 1868 nfsm_wcc_data(dvp, wccflag); 1869 nfsm_reqdone; 1870 FREE(cnp->cn_pnbuf, M_NAMEI); 1871 VTONFS(dvp)->n_flag |= NMODIFIED; 1872 if (!wccflag) 1873 VTONFS(dvp)->n_attrstamp = 0; 1874 cache_purge(dvp); 1875 cache_purge(vp); 1876 vrele(vp); 1877 vrele(dvp); 1878 /* 1879 * Kludge: Map ENOENT => 0 assuming that you have a reply to a retry. 1880 */ 1881 if (error == ENOENT) 1882 error = 0; 1883 return (error); 1884 } 1885 1886 /* 1887 * nfs readdir call 1888 */ 1889 int 1890 nfs_readdir(ap) 1891 struct vop_readdir_args /* { 1892 struct vnode *a_vp; 1893 struct uio *a_uio; 1894 struct ucred *a_cred; 1895 } */ *ap; 1896 { 1897 register struct vnode *vp = ap->a_vp; 1898 register struct nfsnode *np = VTONFS(vp); 1899 register struct uio *uio = ap->a_uio; 1900 int tresid, error; 1901 struct vattr vattr; 1902 1903 if (vp->v_type != VDIR) 1904 return (EPERM); 1905 /* 1906 * First, check for hit on the EOF offset cache 1907 */ 1908 if (np->n_direofoffset > 0 && uio->uio_offset >= np->n_direofoffset && 1909 (np->n_flag & NMODIFIED) == 0) { 1910 if (VFSTONFS(vp->v_mount)->nm_flag & NFSMNT_NQNFS) { 1911 if (NQNFS_CKCACHABLE(vp, ND_READ)) { 1912 nfsstats.direofcache_hits++; 1913 return (0); 1914 } 1915 } else if (VOP_GETATTR(vp, &vattr, ap->a_cred, uio->uio_procp) == 0 && 1916 np->n_mtime == vattr.va_mtime.ts_sec) { 1917 nfsstats.direofcache_hits++; 1918 return (0); 1919 } 1920 } 1921 1922 /* 1923 * Call nfs_bioread() to do the real work. 1924 */ 1925 tresid = uio->uio_resid; 1926 error = nfs_bioread(vp, uio, 0, ap->a_cred); 1927 1928 if (!error && uio->uio_resid == tresid) 1929 nfsstats.direofcache_misses++; 1930 return (error); 1931 } 1932 1933 /* 1934 * Readdir rpc call. 1935 * Called from below the buffer cache by nfs_doio(). 1936 */ 1937 int 1938 nfs_readdirrpc(vp, uiop, cred) 1939 struct vnode *vp; 1940 register struct uio *uiop; 1941 struct ucred *cred; 1942 { 1943 register int len, left; 1944 register struct dirent *dp; 1945 register u_long *tl; 1946 register caddr_t cp; 1947 register long t1, t2; 1948 register nfsuint64 *cookiep; 1949 caddr_t bpos, dpos, cp2; 1950 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 1951 nfsuint64 cookie; 1952 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 1953 struct nfsnode *dnp = VTONFS(vp); 1954 nfsfh_t *fhp; 1955 u_quad_t frev, fileno; 1956 int error = 0, tlen, more_dirs = 1, blksiz = 0, bigenough = 1, i; 1957 int cachable, attrflag, fhsize; 1958 int v3 = NFS_ISV3(vp); 1959 1960 #ifndef nolint 1961 dp = (struct dirent *)0; 1962 #endif 1963 #ifndef DIAGNOSTIC 1964 if (uiop->uio_iovcnt != 1 || (uiop->uio_offset & (NFS_DIRBLKSIZ - 1)) || 1965 (uiop->uio_resid & (NFS_DIRBLKSIZ - 1))) 1966 panic("nfs readdirrpc bad uio"); 1967 #endif 1968 1969 /* 1970 * If there is no cookie, assume end of directory. 1971 */ 1972 cookiep = nfs_getcookie(dnp, uiop->uio_offset, 0); 1973 if (cookiep) 1974 cookie = *cookiep; 1975 else 1976 return (0); 1977 /* 1978 * Loop around doing readdir rpc's of size nm_readdirsize 1979 * truncated to a multiple of DIRBLKSIZ. 1980 * The stopping criteria is EOF or buffer full. 1981 */ 1982 while (more_dirs && bigenough) { 1983 nfsstats.rpccnt[NFSPROC_READDIR]++; 1984 nfsm_reqhead(vp, NFSPROC_READDIR, NFSX_FH(v3) + 1985 NFSX_READDIR(v3)); 1986 nfsm_fhtom(vp, v3); 1987 if (v3) { 1988 nfsm_build(tl, u_long *, 5 * NFSX_UNSIGNED); 1989 *tl++ = cookie.nfsuquad[0]; 1990 *tl++ = cookie.nfsuquad[1]; 1991 *tl++ = dnp->n_cookieverf.nfsuquad[0]; 1992 *tl++ = dnp->n_cookieverf.nfsuquad[1]; 1993 } else { 1994 nfsm_build(tl, u_long *, 2 * NFSX_UNSIGNED); 1995 *tl++ = cookie.nfsuquad[0]; 1996 } 1997 *tl = txdr_unsigned(nmp->nm_readdirsize); 1998 nfsm_request(vp, NFSPROC_READDIR, uiop->uio_procp, cred); 1999 if (v3) { 2000 nfsm_postop_attr(vp, attrflag); 2001 if (!error) { 2002 nfsm_dissect(tl, u_long *, 2 * NFSX_UNSIGNED); 2003 dnp->n_cookieverf.nfsuquad[0] = *tl++; 2004 dnp->n_cookieverf.nfsuquad[1] = *tl; 2005 } else { 2006 m_freem(mrep); 2007 goto nfsmout; 2008 } 2009 } 2010 nfsm_dissect(tl, u_long *, NFSX_UNSIGNED); 2011 more_dirs = fxdr_unsigned(int, *tl); 2012 2013 /* loop thru the dir entries, doctoring them to 4bsd form */ 2014 while (more_dirs && bigenough) { 2015 if (v3) { 2016 nfsm_dissect(tl, u_long *, 3 * NFSX_UNSIGNED); 2017 fxdr_hyper(tl, &fileno); 2018 len = fxdr_unsigned(int, *(tl + 2)); 2019 } else { 2020 nfsm_dissect(tl, u_long *, 2 * NFSX_UNSIGNED); 2021 fileno = fxdr_unsigned(u_quad_t, *tl++); 2022 len = fxdr_unsigned(int, *tl); 2023 } 2024 if (len <= 0 || len > NFS_MAXNAMLEN) { 2025 error = EBADRPC; 2026 m_freem(mrep); 2027 goto nfsmout; 2028 } 2029 tlen = nfsm_rndup(len); 2030 if (tlen == len) 2031 tlen += 4; /* To ensure null termination */ 2032 left = DIRBLKSIZ - blksiz; 2033 if ((tlen + DIRHDSIZ) > left) { 2034 dp->d_reclen += left; 2035 uiop->uio_iov->iov_base += left; 2036 uiop->uio_iov->iov_len -= left; 2037 uiop->uio_offset += left; 2038 uiop->uio_resid -= left; 2039 blksiz = 0; 2040 } 2041 if ((tlen + DIRHDSIZ) > uiop->uio_resid) 2042 bigenough = 0; 2043 if (bigenough) { 2044 dp = (struct dirent *)uiop->uio_iov->iov_base; 2045 dp->d_fileno = (int)fileno; 2046 dp->d_namlen = len; 2047 dp->d_reclen = tlen + DIRHDSIZ; 2048 dp->d_type = DT_UNKNOWN; 2049 blksiz += dp->d_reclen; 2050 if (blksiz == DIRBLKSIZ) 2051 blksiz = 0; 2052 uiop->uio_offset += DIRHDSIZ; 2053 uiop->uio_resid -= DIRHDSIZ; 2054 uiop->uio_iov->iov_base += DIRHDSIZ; 2055 uiop->uio_iov->iov_len -= DIRHDSIZ; 2056 nfsm_mtouio(uiop, len); 2057 cp = uiop->uio_iov->iov_base; 2058 tlen -= len; 2059 *cp = '\0'; /* null terminate */ 2060 uiop->uio_iov->iov_base += tlen; 2061 uiop->uio_iov->iov_len -= tlen; 2062 uiop->uio_offset += tlen; 2063 uiop->uio_resid -= tlen; 2064 } else 2065 nfsm_adv(nfsm_rndup(len)); 2066 if (v3) { 2067 nfsm_dissect(tl, u_long *, 3 * NFSX_UNSIGNED); 2068 } else { 2069 nfsm_dissect(tl, u_long *, 2 * NFSX_UNSIGNED); 2070 } 2071 if (bigenough) { 2072 cookie.nfsuquad[0] = *tl++; 2073 if (v3) 2074 cookie.nfsuquad[1] = *tl++; 2075 } else if (v3) 2076 tl += 2; 2077 else 2078 tl++; 2079 more_dirs = fxdr_unsigned(int, *tl); 2080 } 2081 /* 2082 * If at end of rpc data, get the eof boolean 2083 */ 2084 if (!more_dirs) { 2085 nfsm_dissect(tl, u_long *, NFSX_UNSIGNED); 2086 more_dirs = (fxdr_unsigned(int, *tl) == 0); 2087 } 2088 m_freem(mrep); 2089 } 2090 /* 2091 * Fill last record, iff any, out to a multiple of DIRBLKSIZ 2092 * by increasing d_reclen for the last record. 2093 */ 2094 if (blksiz > 0) { 2095 left = DIRBLKSIZ - blksiz; 2096 dp->d_reclen += left; 2097 uiop->uio_iov->iov_base += left; 2098 uiop->uio_iov->iov_len -= left; 2099 uiop->uio_offset += left; 2100 uiop->uio_resid -= left; 2101 } 2102 2103 /* 2104 * We are now either at the end of the directory or have filled the 2105 * block. 2106 */ 2107 if (bigenough) 2108 dnp->n_direofoffset = uiop->uio_offset; 2109 else { 2110 if (uiop->uio_resid > 0) 2111 printf("EEK! readdirrpc resid > 0\n"); 2112 cookiep = nfs_getcookie(dnp, uiop->uio_offset, 1); 2113 *cookiep = cookie; 2114 } 2115 nfsmout: 2116 return (error); 2117 } 2118 2119 /* 2120 * NFS V3 readdir plus RPC. Used in place of nfs_readdirrpc(). 2121 */ 2122 int 2123 nfs_readdirplusrpc(vp, uiop, cred) 2124 struct vnode *vp; 2125 register struct uio *uiop; 2126 struct ucred *cred; 2127 { 2128 register int len, left; 2129 register struct dirent *dp; 2130 register u_long *tl; 2131 register caddr_t cp; 2132 register long t1, t2; 2133 register struct vnode *newvp; 2134 register nfsuint64 *cookiep; 2135 caddr_t bpos, dpos, cp2, dpossav1, dpossav2; 2136 struct mbuf *mreq, *mrep, *md, *mb, *mb2, *mdsav1, *mdsav2; 2137 struct nameidata nami, *ndp = &nami; 2138 struct componentname *cnp = &ndp->ni_cnd; 2139 nfsuint64 cookie; 2140 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 2141 struct nfsnode *dnp = VTONFS(vp), *np; 2142 nfsfh_t *fhp; 2143 u_quad_t frev, fileno; 2144 int error = 0, tlen, more_dirs = 1, blksiz = 0, doit, bigenough = 1, i; 2145 int cachable, attrflag, fhsize; 2146 2147 #ifndef nolint 2148 dp = (struct dirent *)0; 2149 #endif 2150 #ifndef DIAGNOSTIC 2151 if (uiop->uio_iovcnt != 1 || (uiop->uio_offset & (DIRBLKSIZ - 1)) || 2152 (uiop->uio_resid & (DIRBLKSIZ - 1))) 2153 panic("nfs readdirplusrpc bad uio"); 2154 #endif 2155 ndp->ni_dvp = vp; 2156 newvp = NULLVP; 2157 2158 /* 2159 * If there is no cookie, assume end of directory. 2160 */ 2161 cookiep = nfs_getcookie(dnp, uiop->uio_offset, 0); 2162 if (cookiep) 2163 cookie = *cookiep; 2164 else 2165 return (0); 2166 /* 2167 * Loop around doing readdir rpc's of size nm_readdirsize 2168 * truncated to a multiple of DIRBLKSIZ. 2169 * The stopping criteria is EOF or buffer full. 2170 */ 2171 while (more_dirs && bigenough) { 2172 nfsstats.rpccnt[NFSPROC_READDIRPLUS]++; 2173 nfsm_reqhead(vp, NFSPROC_READDIRPLUS, 2174 NFSX_FH(1) + 6 * NFSX_UNSIGNED); 2175 nfsm_fhtom(vp, 1); 2176 nfsm_build(tl, u_long *, 6 * NFSX_UNSIGNED); 2177 *tl++ = cookie.nfsuquad[0]; 2178 *tl++ = cookie.nfsuquad[1]; 2179 *tl++ = dnp->n_cookieverf.nfsuquad[0]; 2180 *tl++ = dnp->n_cookieverf.nfsuquad[1]; 2181 *tl++ = txdr_unsigned(nmp->nm_readdirsize); 2182 *tl = txdr_unsigned(nmp->nm_rsize); 2183 nfsm_request(vp, NFSPROC_READDIRPLUS, uiop->uio_procp, cred); 2184 nfsm_postop_attr(vp, attrflag); 2185 if (error) { 2186 m_freem(mrep); 2187 goto nfsmout; 2188 } 2189 nfsm_dissect(tl, u_long *, 3 * NFSX_UNSIGNED); 2190 dnp->n_cookieverf.nfsuquad[0] = *tl++; 2191 dnp->n_cookieverf.nfsuquad[1] = *tl++; 2192 more_dirs = fxdr_unsigned(int, *tl); 2193 2194 /* loop thru the dir entries, doctoring them to 4bsd form */ 2195 while (more_dirs && bigenough) { 2196 nfsm_dissect(tl, u_long *, 3 * NFSX_UNSIGNED); 2197 fxdr_hyper(tl, &fileno); 2198 len = fxdr_unsigned(int, *(tl + 2)); 2199 if (len <= 0 || len > NFS_MAXNAMLEN) { 2200 error = EBADRPC; 2201 m_freem(mrep); 2202 goto nfsmout; 2203 } 2204 tlen = nfsm_rndup(len); 2205 if (tlen == len) 2206 tlen += 4; /* To ensure null termination*/ 2207 left = DIRBLKSIZ - blksiz; 2208 if ((tlen + DIRHDSIZ) > left) { 2209 dp->d_reclen += left; 2210 uiop->uio_iov->iov_base += left; 2211 uiop->uio_iov->iov_len -= left; 2212 uiop->uio_offset += left; 2213 uiop->uio_resid -= left; 2214 blksiz = 0; 2215 } 2216 if ((tlen + DIRHDSIZ) > uiop->uio_resid) 2217 bigenough = 0; 2218 if (bigenough) { 2219 dp = (struct dirent *)uiop->uio_iov->iov_base; 2220 dp->d_fileno = (int)fileno; 2221 dp->d_namlen = len; 2222 dp->d_reclen = tlen + DIRHDSIZ; 2223 dp->d_type = DT_UNKNOWN; 2224 blksiz += dp->d_reclen; 2225 if (blksiz == DIRBLKSIZ) 2226 blksiz = 0; 2227 uiop->uio_offset += DIRHDSIZ; 2228 uiop->uio_resid -= DIRHDSIZ; 2229 uiop->uio_iov->iov_base += DIRHDSIZ; 2230 uiop->uio_iov->iov_len -= DIRHDSIZ; 2231 cnp->cn_nameptr = uiop->uio_iov->iov_base; 2232 cnp->cn_namelen = len; 2233 nfsm_mtouio(uiop, len); 2234 cp = uiop->uio_iov->iov_base; 2235 tlen -= len; 2236 *cp = '\0'; 2237 uiop->uio_iov->iov_base += tlen; 2238 uiop->uio_iov->iov_len -= tlen; 2239 uiop->uio_offset += tlen; 2240 uiop->uio_resid -= tlen; 2241 } else 2242 nfsm_adv(nfsm_rndup(len)); 2243 nfsm_dissect(tl, u_long *, 3 * NFSX_UNSIGNED); 2244 if (bigenough) { 2245 cookie.nfsuquad[0] = *tl++; 2246 cookie.nfsuquad[1] = *tl++; 2247 } else 2248 tl += 2; 2249 2250 /* 2251 * Since the attributes are before the file handle 2252 * (sigh), we must skip over the attributes and then 2253 * come back and get them. 2254 */ 2255 attrflag = fxdr_unsigned(int, *tl); 2256 if (attrflag) { 2257 dpossav1 = dpos; 2258 mdsav1 = md; 2259 nfsm_adv(NFSX_V3FATTR); 2260 nfsm_dissect(tl, u_long *, NFSX_UNSIGNED); 2261 doit = fxdr_unsigned(int, *tl); 2262 if (doit) { 2263 nfsm_getfh(fhp, fhsize, 1); 2264 if (NFS_CMPFH(dnp, fhp, fhsize)) { 2265 VREF(vp); 2266 newvp = vp; 2267 np = dnp; 2268 } else { 2269 if (error = nfs_nget(vp->v_mount, fhp, 2270 fhsize, &np)) 2271 doit = 0; 2272 else 2273 newvp = NFSTOV(np); 2274 } 2275 } 2276 if (doit) { 2277 dpossav2 = dpos; 2278 dpos = dpossav1; 2279 mdsav2 = md; 2280 md = mdsav1; 2281 nfsm_loadattr(newvp, (struct vattr *)0); 2282 dpos = dpossav2; 2283 md = mdsav2; 2284 dp->d_type = 2285 IFTODT(VTTOIF(np->n_vattr.va_type)); 2286 ndp->ni_vp = newvp; 2287 cnp->cn_hash = 0; 2288 for (cp = cnp->cn_nameptr, i = 1; i <= len; 2289 i++, cp++) 2290 cnp->cn_hash += (unsigned char)*cp * i; 2291 if (cnp->cn_namelen <= NCHNAMLEN) 2292 cache_enter(ndp->ni_dvp, ndp->ni_vp, cnp); 2293 } 2294 } else { 2295 /* Just skip over the file handle */ 2296 nfsm_dissect(tl, u_long *, NFSX_UNSIGNED); 2297 i = fxdr_unsigned(int, *tl); 2298 nfsm_adv(nfsm_rndup(i)); 2299 } 2300 if (newvp != NULLVP) { 2301 vrele(newvp); 2302 newvp = NULLVP; 2303 } 2304 nfsm_dissect(tl, u_long *, NFSX_UNSIGNED); 2305 more_dirs = fxdr_unsigned(int, *tl); 2306 } 2307 /* 2308 * If at end of rpc data, get the eof boolean 2309 */ 2310 if (!more_dirs) { 2311 nfsm_dissect(tl, u_long *, NFSX_UNSIGNED); 2312 more_dirs = (fxdr_unsigned(int, *tl) == 0); 2313 } 2314 m_freem(mrep); 2315 } 2316 /* 2317 * Fill last record, iff any, out to a multiple of NFS_DIRBLKSIZ 2318 * by increasing d_reclen for the last record. 2319 */ 2320 if (blksiz > 0) { 2321 left = DIRBLKSIZ - blksiz; 2322 dp->d_reclen += left; 2323 uiop->uio_iov->iov_base += left; 2324 uiop->uio_iov->iov_len -= left; 2325 uiop->uio_offset += left; 2326 uiop->uio_resid -= left; 2327 } 2328 2329 /* 2330 * We are now either at the end of the directory or have filled the 2331 * block. 2332 */ 2333 if (bigenough) 2334 dnp->n_direofoffset = uiop->uio_offset; 2335 else { 2336 if (uiop->uio_resid > 0) 2337 printf("EEK! readdirplusrpc resid > 0\n"); 2338 cookiep = nfs_getcookie(dnp, uiop->uio_offset, 1); 2339 *cookiep = cookie; 2340 } 2341 nfsmout: 2342 if (newvp != NULLVP) 2343 vrele(newvp); 2344 return (error); 2345 } 2346 static char hextoasc[] = "0123456789abcdef"; 2347 2348 /* 2349 * Silly rename. To make the NFS filesystem that is stateless look a little 2350 * more like the "ufs" a remove of an active vnode is translated to a rename 2351 * to a funny looking filename that is removed by nfs_inactive on the 2352 * nfsnode. There is the potential for another process on a different client 2353 * to create the same funny name between the nfs_lookitup() fails and the 2354 * nfs_rename() completes, but... 2355 */ 2356 int 2357 nfs_sillyrename(dvp, vp, cnp) 2358 struct vnode *dvp, *vp; 2359 struct componentname *cnp; 2360 { 2361 register struct sillyrename *sp; 2362 struct nfsnode *np; 2363 int error; 2364 short pid; 2365 2366 cache_purge(dvp); 2367 np = VTONFS(vp); 2368 #ifndef DIAGNOSTIC 2369 if (vp->v_type == VDIR) 2370 panic("nfs: sillyrename dir"); 2371 #endif 2372 MALLOC(sp, struct sillyrename *, sizeof (struct sillyrename), 2373 M_NFSREQ, M_WAITOK); 2374 sp->s_cred = crdup(cnp->cn_cred); 2375 sp->s_dvp = dvp; 2376 VREF(dvp); 2377 2378 /* Fudge together a funny name */ 2379 pid = cnp->cn_proc->p_pid; 2380 bcopy(".nfsAxxxx4.4", sp->s_name, 13); 2381 sp->s_namlen = 12; 2382 sp->s_name[8] = hextoasc[pid & 0xf]; 2383 sp->s_name[7] = hextoasc[(pid >> 4) & 0xf]; 2384 sp->s_name[6] = hextoasc[(pid >> 8) & 0xf]; 2385 sp->s_name[5] = hextoasc[(pid >> 12) & 0xf]; 2386 2387 /* Try lookitups until we get one that isn't there */ 2388 while (nfs_lookitup(dvp, sp->s_name, sp->s_namlen, sp->s_cred, 2389 cnp->cn_proc, (struct nfsnode **)0) == 0) { 2390 sp->s_name[4]++; 2391 if (sp->s_name[4] > 'z') { 2392 error = EINVAL; 2393 goto bad; 2394 } 2395 } 2396 if (error = nfs_renameit(dvp, cnp, sp)) 2397 goto bad; 2398 error = nfs_lookitup(dvp, sp->s_name, sp->s_namlen, sp->s_cred, 2399 cnp->cn_proc, &np); 2400 np->n_sillyrename = sp; 2401 return (0); 2402 bad: 2403 vrele(sp->s_dvp); 2404 crfree(sp->s_cred); 2405 free((caddr_t)sp, M_NFSREQ); 2406 return (error); 2407 } 2408 2409 /* 2410 * Look up a file name and optionally either update the file handle or 2411 * allocate an nfsnode, depending on the value of npp. 2412 * npp == NULL --> just do the lookup 2413 * *npp == NULL --> allocate a new nfsnode and make sure attributes are 2414 * handled too 2415 * *npp != NULL --> update the file handle in the vnode 2416 */ 2417 int 2418 nfs_lookitup(dvp, name, len, cred, procp, npp) 2419 register struct vnode *dvp; 2420 char *name; 2421 int len; 2422 struct ucred *cred; 2423 struct proc *procp; 2424 struct nfsnode **npp; 2425 { 2426 register u_long *tl; 2427 register caddr_t cp; 2428 register long t1, t2; 2429 struct vnode *newvp = (struct vnode *)0; 2430 struct nfsnode *np, *dnp = VTONFS(dvp); 2431 caddr_t bpos, dpos, cp2; 2432 int error = 0, fhlen, attrflag; 2433 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 2434 nfsfh_t *nfhp; 2435 int v3 = NFS_ISV3(dvp); 2436 2437 nfsstats.rpccnt[NFSPROC_LOOKUP]++; 2438 nfsm_reqhead(dvp, NFSPROC_LOOKUP, 2439 NFSX_FH(v3) + NFSX_UNSIGNED + nfsm_rndup(len)); 2440 nfsm_fhtom(dvp, v3); 2441 nfsm_strtom(name, len, NFS_MAXNAMLEN); 2442 nfsm_request(dvp, NFSPROC_LOOKUP, procp, cred); 2443 if (npp && !error) { 2444 nfsm_getfh(nfhp, fhlen, v3); 2445 if (*npp) { 2446 np = *npp; 2447 if (np->n_fhsize > NFS_SMALLFH && fhlen <= NFS_SMALLFH) { 2448 free((caddr_t)np->n_fhp, M_NFSBIGFH); 2449 np->n_fhp = &np->n_fh; 2450 } else if (np->n_fhsize <= NFS_SMALLFH && fhlen>NFS_SMALLFH) 2451 np->n_fhp =(nfsfh_t *)malloc(fhlen,M_NFSBIGFH,M_WAITOK); 2452 bcopy((caddr_t)nfhp, (caddr_t)np->n_fhp, fhlen); 2453 np->n_fhsize = fhlen; 2454 newvp = NFSTOV(np); 2455 } else if (NFS_CMPFH(dnp, nfhp, fhlen)) { 2456 VREF(dvp); 2457 newvp = dvp; 2458 } else { 2459 error = nfs_nget(dvp->v_mount, nfhp, fhlen, &np); 2460 if (error) { 2461 m_freem(mrep); 2462 return (error); 2463 } 2464 newvp = NFSTOV(np); 2465 } 2466 if (v3) { 2467 nfsm_postop_attr(newvp, attrflag); 2468 if (!attrflag && *npp == NULL) { 2469 m_freem(mrep); 2470 vrele(newvp); 2471 return (ENOENT); 2472 } 2473 } else 2474 nfsm_loadattr(newvp, (struct vattr *)0); 2475 } 2476 nfsm_reqdone; 2477 if (npp && *npp == NULL) { 2478 if (error) { 2479 if (newvp) 2480 vrele(newvp); 2481 } else 2482 *npp = np; 2483 } 2484 return (error); 2485 } 2486 2487 /* 2488 * Nfs Version 3 commit rpc 2489 */ 2490 int 2491 nfs_commit(vp, offset, cnt, cred, procp) 2492 register struct vnode *vp; 2493 u_quad_t offset; 2494 int cnt; 2495 struct ucred *cred; 2496 struct proc *procp; 2497 { 2498 register caddr_t cp; 2499 register u_long *tl; 2500 register int t1, t2; 2501 register struct nfsmount *nmp = VFSTONFS(vp->v_mount); 2502 caddr_t bpos, dpos, cp2; 2503 int error = 0, wccflag = NFSV3_WCCRATTR; 2504 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 2505 2506 if ((nmp->nm_flag & NFSMNT_HASWRITEVERF) == 0) 2507 return (0); 2508 nfsstats.rpccnt[NFSPROC_COMMIT]++; 2509 nfsm_reqhead(vp, NFSPROC_COMMIT, NFSX_FH(1)); 2510 nfsm_fhtom(vp, 1); 2511 nfsm_build(tl, u_long *, 3 * NFSX_UNSIGNED); 2512 txdr_hyper(&offset, tl); 2513 tl += 2; 2514 *tl = txdr_unsigned(cnt); 2515 nfsm_request(vp, NFSPROC_COMMIT, procp, cred); 2516 nfsm_wcc_data(vp, wccflag); 2517 if (!error) { 2518 nfsm_dissect(tl, u_long *, NFSX_V3WRITEVERF); 2519 if (bcmp((caddr_t)nmp->nm_verf, (caddr_t)tl, 2520 NFSX_V3WRITEVERF)) { 2521 bcopy((caddr_t)tl, (caddr_t)nmp->nm_verf, 2522 NFSX_V3WRITEVERF); 2523 error = NFSERR_STALEWRITEVERF; 2524 } 2525 } 2526 nfsm_reqdone; 2527 return (error); 2528 } 2529 2530 /* 2531 * Kludge City.. 2532 * - make nfs_bmap() essentially a no-op that does no translation 2533 * - do nfs_strategy() by doing I/O with nfs_readrpc/nfs_writerpc 2534 * (Maybe I could use the process's page mapping, but I was concerned that 2535 * Kernel Write might not be enabled and also figured copyout() would do 2536 * a lot more work than bcopy() and also it currently happens in the 2537 * context of the swapper process (2). 2538 */ 2539 int 2540 nfs_bmap(ap) 2541 struct vop_bmap_args /* { 2542 struct vnode *a_vp; 2543 daddr_t a_bn; 2544 struct vnode **a_vpp; 2545 daddr_t *a_bnp; 2546 int *a_runp; 2547 } */ *ap; 2548 { 2549 register struct vnode *vp = ap->a_vp; 2550 2551 if (ap->a_vpp != NULL) 2552 *ap->a_vpp = vp; 2553 if (ap->a_bnp != NULL) 2554 *ap->a_bnp = ap->a_bn * btodb(vp->v_mount->mnt_stat.f_iosize); 2555 return (0); 2556 } 2557 2558 /* 2559 * Strategy routine. 2560 * For async requests when nfsiod(s) are running, queue the request by 2561 * calling nfs_asyncio(), otherwise just all nfs_doio() to do the 2562 * request. 2563 */ 2564 int 2565 nfs_strategy(ap) 2566 struct vop_strategy_args *ap; 2567 { 2568 register struct buf *bp = ap->a_bp; 2569 struct ucred *cr; 2570 struct proc *p; 2571 int error = 0; 2572 2573 if (bp->b_flags & B_PHYS) 2574 panic("nfs physio"); 2575 if (bp->b_flags & B_ASYNC) 2576 p = (struct proc *)0; 2577 else 2578 p = curproc; /* XXX */ 2579 if (bp->b_flags & B_READ) 2580 cr = bp->b_rcred; 2581 else 2582 cr = bp->b_wcred; 2583 /* 2584 * If the op is asynchronous and an i/o daemon is waiting 2585 * queue the request, wake it up and wait for completion 2586 * otherwise just do it ourselves. 2587 */ 2588 if ((bp->b_flags & B_ASYNC) == 0 || 2589 nfs_asyncio(bp, NOCRED)) 2590 error = nfs_doio(bp, cr, p); 2591 return (error); 2592 } 2593 2594 /* 2595 * Mmap a file 2596 * 2597 * NB Currently unsupported. 2598 */ 2599 /* ARGSUSED */ 2600 int 2601 nfs_mmap(ap) 2602 struct vop_mmap_args /* { 2603 struct vnode *a_vp; 2604 int a_fflags; 2605 struct ucred *a_cred; 2606 struct proc *a_p; 2607 } */ *ap; 2608 { 2609 2610 return (EINVAL); 2611 } 2612 2613 /* 2614 * fsync vnode op. Just call nfs_flush() with commit == 1. 2615 */ 2616 /* ARGSUSED */ 2617 int 2618 nfs_fsync(ap) 2619 struct vop_fsync_args /* { 2620 struct vnodeop_desc *a_desc; 2621 struct vnode * a_vp; 2622 struct ucred * a_cred; 2623 int a_waitfor; 2624 struct proc * a_p; 2625 } */ *ap; 2626 { 2627 2628 return (nfs_flush(ap->a_vp, ap->a_cred, ap->a_waitfor, ap->a_p, 1)); 2629 } 2630 2631 /* 2632 * Flush all the blocks associated with a vnode. 2633 * Walk through the buffer pool and push any dirty pages 2634 * associated with the vnode. 2635 */ 2636 int 2637 nfs_flush(vp, cred, waitfor, p, commit) 2638 register struct vnode *vp; 2639 struct ucred *cred; 2640 int waitfor; 2641 struct proc *p; 2642 int commit; 2643 { 2644 register struct nfsnode *np = VTONFS(vp); 2645 register struct buf *bp; 2646 register int i; 2647 struct buf *nbp; 2648 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 2649 int s, error = 0, slptimeo = 0, slpflag = 0, retv, bvecpos; 2650 int passone = 1; 2651 u_quad_t off = (u_quad_t)-1, endoff = 0, toff; 2652 #ifndef NFS_COMMITBVECSIZ 2653 #define NFS_COMMITBVECSIZ 20 2654 #endif 2655 struct buf *bvec[NFS_COMMITBVECSIZ]; 2656 2657 if (nmp->nm_flag & NFSMNT_INT) 2658 slpflag = PCATCH; 2659 if (!commit) 2660 passone = 0; 2661 /* 2662 * A b_flags == (B_DELWRI | B_NEEDCOMMIT) block has been written to the 2663 * server, but nas not been committed to stable storage on the server 2664 * yet. On the first pass, the byte range is worked out and the commit 2665 * rpc is done. On the second pass, nfs_writebp() is called to do the 2666 * job. 2667 */ 2668 again: 2669 bvecpos = 0; 2670 if (NFS_ISV3(vp) && commit) { 2671 s = splbio(); 2672 for (bp = vp->v_dirtyblkhd.lh_first; bp; bp = nbp) { 2673 nbp = bp->b_vnbufs.le_next; 2674 if (bvecpos >= NFS_COMMITBVECSIZ) 2675 break; 2676 if ((bp->b_flags & (B_BUSY | B_DELWRI | B_NEEDCOMMIT)) 2677 != (B_DELWRI | B_NEEDCOMMIT)) 2678 continue; 2679 bremfree(bp); 2680 bp->b_flags |= (B_BUSY | B_WRITEINPROG); 2681 /* 2682 * A list of these buffers is kept so that the 2683 * second loop knows which buffers have actually 2684 * been committed. This is necessary, since there 2685 * may be a race between the commit rpc and new 2686 * uncommitted writes on the file. 2687 */ 2688 bvec[bvecpos++] = bp; 2689 toff = ((u_quad_t)bp->b_blkno) * DEV_BSIZE + 2690 bp->b_dirtyoff; 2691 if (toff < off) 2692 off = toff; 2693 toff += (u_quad_t)(bp->b_dirtyend - bp->b_dirtyoff); 2694 if (toff > endoff) 2695 endoff = toff; 2696 } 2697 splx(s); 2698 } 2699 if (bvecpos > 0) { 2700 /* 2701 * Commit data on the server, as required. 2702 */ 2703 retv = nfs_commit(vp, off, (int)(endoff - off), cred, p); 2704 if (retv == NFSERR_STALEWRITEVERF) 2705 nfs_clearcommit(vp->v_mount); 2706 /* 2707 * Now, either mark the blocks I/O done or mark the 2708 * blocks dirty, depending on whether the commit 2709 * succeeded. 2710 */ 2711 for (i = 0; i < bvecpos; i++) { 2712 bp = bvec[i]; 2713 bp->b_flags &= ~(B_NEEDCOMMIT | B_WRITEINPROG); 2714 if (retv) { 2715 brelse(bp); 2716 } else { 2717 vp->v_numoutput++; 2718 bp->b_flags |= B_ASYNC; 2719 bp->b_flags &= ~(B_READ|B_DONE|B_ERROR|B_DELWRI); 2720 bp->b_dirtyoff = bp->b_dirtyend = 0; 2721 reassignbuf(bp, vp); 2722 biodone(bp); 2723 } 2724 } 2725 } 2726 2727 /* 2728 * Start/do any write(s) that are required. 2729 */ 2730 loop: 2731 s = splbio(); 2732 for (bp = vp->v_dirtyblkhd.lh_first; bp; bp = nbp) { 2733 nbp = bp->b_vnbufs.le_next; 2734 if (bp->b_flags & B_BUSY) { 2735 if (waitfor != MNT_WAIT || passone) 2736 continue; 2737 bp->b_flags |= B_WANTED; 2738 error = tsleep((caddr_t)bp, slpflag | (PRIBIO + 1), 2739 "nfsfsync", slptimeo); 2740 splx(s); 2741 if (error) { 2742 if (nfs_sigintr(nmp, (struct nfsreq *)0, p)) 2743 return (EINTR); 2744 if (slpflag == PCATCH) { 2745 slpflag = 0; 2746 slptimeo = 2 * hz; 2747 } 2748 } 2749 goto loop; 2750 } 2751 if ((bp->b_flags & B_DELWRI) == 0) 2752 panic("nfs_fsync: not dirty"); 2753 if ((passone || !commit) && (bp->b_flags & B_NEEDCOMMIT)) 2754 continue; 2755 bremfree(bp); 2756 if (passone || !commit) 2757 bp->b_flags |= (B_BUSY|B_ASYNC); 2758 else 2759 bp->b_flags |= (B_BUSY|B_ASYNC|B_WRITEINPROG|B_NEEDCOMMIT); 2760 splx(s); 2761 VOP_BWRITE(bp); 2762 goto loop; 2763 } 2764 splx(s); 2765 if (passone) { 2766 passone = 0; 2767 goto again; 2768 } 2769 if (waitfor == MNT_WAIT) { 2770 while (vp->v_numoutput) { 2771 vp->v_flag |= VBWAIT; 2772 error = tsleep((caddr_t)&vp->v_numoutput, 2773 slpflag | (PRIBIO + 1), "nfsfsync", slptimeo); 2774 if (error) { 2775 if (nfs_sigintr(nmp, (struct nfsreq *)0, p)) 2776 return (EINTR); 2777 if (slpflag == PCATCH) { 2778 slpflag = 0; 2779 slptimeo = 2 * hz; 2780 } 2781 } 2782 } 2783 if (vp->v_dirtyblkhd.lh_first && commit) { 2784 #ifndef DIAGNOSTIC 2785 vprint("nfs_fsync: dirty", vp); 2786 #endif 2787 goto loop; 2788 } 2789 } 2790 if (np->n_flag & NWRITEERR) { 2791 error = np->n_error; 2792 np->n_flag &= ~NWRITEERR; 2793 } 2794 return (error); 2795 } 2796 2797 /* 2798 * Return POSIX pathconf information applicable to nfs. 2799 * 2800 * The NFS V2 protocol doesn't support this, so just return EINVAL 2801 * for V2. 2802 */ 2803 /* ARGSUSED */ 2804 int 2805 nfs_pathconf(ap) 2806 struct vop_pathconf_args /* { 2807 struct vnode *a_vp; 2808 int a_name; 2809 int *a_retval; 2810 } */ *ap; 2811 { 2812 2813 return (EINVAL); 2814 } 2815 2816 /* 2817 * NFS advisory byte-level locks. 2818 * Currently unsupported. 2819 */ 2820 int 2821 nfs_advlock(ap) 2822 struct vop_advlock_args /* { 2823 struct vnode *a_vp; 2824 caddr_t a_id; 2825 int a_op; 2826 struct flock *a_fl; 2827 int a_flags; 2828 } */ *ap; 2829 { 2830 2831 return (EOPNOTSUPP); 2832 } 2833 2834 /* 2835 * Print out the contents of an nfsnode. 2836 */ 2837 int 2838 nfs_print(ap) 2839 struct vop_print_args /* { 2840 struct vnode *a_vp; 2841 } */ *ap; 2842 { 2843 register struct vnode *vp = ap->a_vp; 2844 register struct nfsnode *np = VTONFS(vp); 2845 2846 printf("tag VT_NFS, fileid %ld fsid 0x%lx", 2847 np->n_vattr.va_fileid, np->n_vattr.va_fsid); 2848 if (vp->v_type == VFIFO) 2849 fifo_printinfo(vp); 2850 printf("\n"); 2851 return (0); 2852 } 2853 2854 /* 2855 * NFS directory offset lookup. 2856 * Currently unsupported. 2857 */ 2858 int 2859 nfs_blkatoff(ap) 2860 struct vop_blkatoff_args /* { 2861 struct vnode *a_vp; 2862 off_t a_offset; 2863 char **a_res; 2864 struct buf **a_bpp; 2865 } */ *ap; 2866 { 2867 2868 return (EOPNOTSUPP); 2869 } 2870 2871 /* 2872 * NFS flat namespace allocation. 2873 * Currently unsupported. 2874 */ 2875 int 2876 nfs_valloc(ap) 2877 struct vop_valloc_args /* { 2878 struct vnode *a_pvp; 2879 int a_mode; 2880 struct ucred *a_cred; 2881 struct vnode **a_vpp; 2882 } */ *ap; 2883 { 2884 2885 return (EOPNOTSUPP); 2886 } 2887 2888 /* 2889 * NFS flat namespace free. 2890 * Currently unsupported. 2891 */ 2892 int 2893 nfs_vfree(ap) 2894 struct vop_vfree_args /* { 2895 struct vnode *a_pvp; 2896 ino_t a_ino; 2897 int a_mode; 2898 } */ *ap; 2899 { 2900 2901 return (EOPNOTSUPP); 2902 } 2903 2904 /* 2905 * NFS file truncation. 2906 */ 2907 int 2908 nfs_truncate(ap) 2909 struct vop_truncate_args /* { 2910 struct vnode *a_vp; 2911 off_t a_length; 2912 int a_flags; 2913 struct ucred *a_cred; 2914 struct proc *a_p; 2915 } */ *ap; 2916 { 2917 2918 /* Use nfs_setattr */ 2919 printf("nfs_truncate: need to implement!!"); 2920 return (EOPNOTSUPP); 2921 } 2922 2923 /* 2924 * NFS update. 2925 */ 2926 int 2927 nfs_update(ap) 2928 struct vop_update_args /* { 2929 struct vnode *a_vp; 2930 struct timeval *a_ta; 2931 struct timeval *a_tm; 2932 int a_waitfor; 2933 } */ *ap; 2934 { 2935 2936 /* Use nfs_setattr */ 2937 printf("nfs_update: need to implement!!"); 2938 return (EOPNOTSUPP); 2939 } 2940 2941 /* 2942 * Just call nfs_writebp() with the force argument set to 1. 2943 */ 2944 int 2945 nfs_bwrite(ap) 2946 struct vop_bwrite_args /* { 2947 struct vnode *a_bp; 2948 } */ *ap; 2949 { 2950 2951 return (nfs_writebp(ap->a_bp, 1)); 2952 } 2953 2954 /* 2955 * This is a clone of vn_bwrite(), except that B_WRITEINPROG isn't set unless 2956 * the force flag is one and it also handles the B_NEEDCOMMIT flag. 2957 */ 2958 int 2959 nfs_writebp(bp, force) 2960 register struct buf *bp; 2961 int force; 2962 { 2963 register int oldflags = bp->b_flags, retv = 1; 2964 register struct proc *p = curproc; /* XXX */ 2965 off_t off; 2966 2967 if(!(bp->b_flags & B_BUSY)) 2968 panic("bwrite: buffer is not busy???"); 2969 2970 bp->b_flags &= ~(B_READ|B_DONE|B_ERROR|B_DELWRI); 2971 2972 if (oldflags & B_ASYNC) { 2973 if (oldflags & B_DELWRI) { 2974 reassignbuf(bp, bp->b_vp); 2975 } else if (p) { 2976 ++p->p_stats->p_ru.ru_oublock; 2977 } 2978 } 2979 bp->b_vp->v_numoutput++; 2980 2981 /* 2982 * If B_NEEDCOMMIT is set, a commit rpc may do the trick. If not 2983 * an actual write will have to be scheduled via. VOP_STRATEGY(). 2984 * If B_WRITEINPROG is already set, then push it with a write anyhow. 2985 */ 2986 if (oldflags & (B_NEEDCOMMIT | B_WRITEINPROG) == B_NEEDCOMMIT) { 2987 off = ((u_quad_t)bp->b_blkno) * DEV_BSIZE + bp->b_dirtyoff; 2988 bp->b_flags |= B_WRITEINPROG; 2989 retv = nfs_commit(bp->b_vp, off, bp->b_dirtyend-bp->b_dirtyoff, 2990 bp->b_wcred, bp->b_proc); 2991 bp->b_flags &= ~B_WRITEINPROG; 2992 if (!retv) { 2993 bp->b_dirtyoff = bp->b_dirtyend = 0; 2994 bp->b_flags &= ~B_NEEDCOMMIT; 2995 biodone(bp); 2996 } else if (retv == NFSERR_STALEWRITEVERF) 2997 nfs_clearcommit(bp->b_vp->v_mount); 2998 } 2999 if (retv) { 3000 if (force) 3001 bp->b_flags |= B_WRITEINPROG; 3002 VOP_STRATEGY(bp); 3003 } 3004 3005 if( (oldflags & B_ASYNC) == 0) { 3006 int rtval = biowait(bp); 3007 if (oldflags & B_DELWRI) { 3008 reassignbuf(bp, bp->b_vp); 3009 } else if (p) { 3010 ++p->p_stats->p_ru.ru_oublock; 3011 } 3012 brelse(bp); 3013 return (rtval); 3014 } 3015 3016 return (0); 3017 } 3018 3019 /* 3020 * nfs special file access vnode op. 3021 * Essentially just get vattr and then imitate iaccess() since the device is 3022 * local to the client. 3023 */ 3024 int 3025 nfsspec_access(ap) 3026 struct vop_access_args /* { 3027 struct vnode *a_vp; 3028 int a_mode; 3029 struct ucred *a_cred; 3030 struct proc *a_p; 3031 } */ *ap; 3032 { 3033 register struct vattr *vap; 3034 register gid_t *gp; 3035 register struct ucred *cred = ap->a_cred; 3036 struct vnode *vp = ap->a_vp; 3037 mode_t mode = ap->a_mode; 3038 struct vattr vattr; 3039 register int i; 3040 int error; 3041 3042 /* 3043 * Disallow write attempts on filesystems mounted read-only; 3044 * unless the file is a socket, fifo, or a block or character 3045 * device resident on the filesystem. 3046 */ 3047 if ((mode & VWRITE) && (vp->v_mount->mnt_flag & MNT_RDONLY)) { 3048 switch (vp->v_type) { 3049 case VREG: case VDIR: case VLNK: 3050 return (EROFS); 3051 } 3052 } 3053 /* 3054 * If you're the super-user, 3055 * you always get access. 3056 */ 3057 if (cred->cr_uid == 0) 3058 return (0); 3059 vap = &vattr; 3060 error = VOP_GETATTR(vp, vap, cred, ap->a_p); 3061 if (error) 3062 return (error); 3063 /* 3064 * Access check is based on only one of owner, group, public. 3065 * If not owner, then check group. If not a member of the 3066 * group, then check public access. 3067 */ 3068 if (cred->cr_uid != vap->va_uid) { 3069 mode >>= 3; 3070 gp = cred->cr_groups; 3071 for (i = 0; i < cred->cr_ngroups; i++, gp++) 3072 if (vap->va_gid == *gp) 3073 goto found; 3074 mode >>= 3; 3075 found: 3076 ; 3077 } 3078 error = (vap->va_mode & mode) == mode ? 0 : EACCES; 3079 return (error); 3080 } 3081 3082 /* 3083 * Read wrapper for special devices. 3084 */ 3085 int 3086 nfsspec_read(ap) 3087 struct vop_read_args /* { 3088 struct vnode *a_vp; 3089 struct uio *a_uio; 3090 int a_ioflag; 3091 struct ucred *a_cred; 3092 } */ *ap; 3093 { 3094 register struct nfsnode *np = VTONFS(ap->a_vp); 3095 3096 /* 3097 * Set access flag. 3098 */ 3099 np->n_flag |= NACC; 3100 np->n_atim.ts_sec = time.tv_sec; 3101 np->n_atim.ts_nsec = time.tv_usec * 1000; 3102 return (VOCALL(spec_vnodeop_p, VOFFSET(vop_read), ap)); 3103 } 3104 3105 /* 3106 * Write wrapper for special devices. 3107 */ 3108 int 3109 nfsspec_write(ap) 3110 struct vop_write_args /* { 3111 struct vnode *a_vp; 3112 struct uio *a_uio; 3113 int a_ioflag; 3114 struct ucred *a_cred; 3115 } */ *ap; 3116 { 3117 register struct nfsnode *np = VTONFS(ap->a_vp); 3118 3119 /* 3120 * Set update flag. 3121 */ 3122 np->n_flag |= NUPD; 3123 np->n_mtim.ts_sec = time.tv_sec; 3124 np->n_mtim.ts_nsec = time.tv_usec * 1000; 3125 return (VOCALL(spec_vnodeop_p, VOFFSET(vop_write), ap)); 3126 } 3127 3128 /* 3129 * Close wrapper for special devices. 3130 * 3131 * Update the times on the nfsnode then do device close. 3132 */ 3133 int 3134 nfsspec_close(ap) 3135 struct vop_close_args /* { 3136 struct vnode *a_vp; 3137 int a_fflag; 3138 struct ucred *a_cred; 3139 struct proc *a_p; 3140 } */ *ap; 3141 { 3142 register struct vnode *vp = ap->a_vp; 3143 register struct nfsnode *np = VTONFS(vp); 3144 struct vattr vattr; 3145 3146 if (np->n_flag & (NACC | NUPD)) { 3147 np->n_flag |= NCHG; 3148 if (vp->v_usecount == 1 && 3149 (vp->v_mount->mnt_flag & MNT_RDONLY) == 0) { 3150 VATTR_NULL(&vattr); 3151 if (np->n_flag & NACC) 3152 vattr.va_atime = np->n_atim; 3153 if (np->n_flag & NUPD) 3154 vattr.va_mtime = np->n_mtim; 3155 (void)VOP_SETATTR(vp, &vattr, ap->a_cred, ap->a_p); 3156 } 3157 } 3158 return (VOCALL(spec_vnodeop_p, VOFFSET(vop_close), ap)); 3159 } 3160 3161 /* 3162 * Read wrapper for fifos. 3163 */ 3164 int 3165 nfsfifo_read(ap) 3166 struct vop_read_args /* { 3167 struct vnode *a_vp; 3168 struct uio *a_uio; 3169 int a_ioflag; 3170 struct ucred *a_cred; 3171 } */ *ap; 3172 { 3173 extern int (**fifo_vnodeop_p)(); 3174 register struct nfsnode *np = VTONFS(ap->a_vp); 3175 3176 /* 3177 * Set access flag. 3178 */ 3179 np->n_flag |= NACC; 3180 np->n_atim.ts_sec = time.tv_sec; 3181 np->n_atim.ts_nsec = time.tv_usec * 1000; 3182 return (VOCALL(fifo_vnodeop_p, VOFFSET(vop_read), ap)); 3183 } 3184 3185 /* 3186 * Write wrapper for fifos. 3187 */ 3188 int 3189 nfsfifo_write(ap) 3190 struct vop_write_args /* { 3191 struct vnode *a_vp; 3192 struct uio *a_uio; 3193 int a_ioflag; 3194 struct ucred *a_cred; 3195 } */ *ap; 3196 { 3197 extern int (**fifo_vnodeop_p)(); 3198 register struct nfsnode *np = VTONFS(ap->a_vp); 3199 3200 /* 3201 * Set update flag. 3202 */ 3203 np->n_flag |= NUPD; 3204 np->n_mtim.ts_sec = time.tv_sec; 3205 np->n_mtim.ts_nsec = time.tv_usec * 1000; 3206 return (VOCALL(fifo_vnodeop_p, VOFFSET(vop_write), ap)); 3207 } 3208 3209 /* 3210 * Close wrapper for fifos. 3211 * 3212 * Update the times on the nfsnode then do fifo close. 3213 */ 3214 int 3215 nfsfifo_close(ap) 3216 struct vop_close_args /* { 3217 struct vnode *a_vp; 3218 int a_fflag; 3219 struct ucred *a_cred; 3220 struct proc *a_p; 3221 } */ *ap; 3222 { 3223 register struct vnode *vp = ap->a_vp; 3224 register struct nfsnode *np = VTONFS(vp); 3225 struct vattr vattr; 3226 extern int (**fifo_vnodeop_p)(); 3227 3228 if (np->n_flag & (NACC | NUPD)) { 3229 if (np->n_flag & NACC) { 3230 np->n_atim.ts_sec = time.tv_sec; 3231 np->n_atim.ts_nsec = time.tv_usec * 1000; 3232 } 3233 if (np->n_flag & NUPD) { 3234 np->n_mtim.ts_sec = time.tv_sec; 3235 np->n_mtim.ts_nsec = time.tv_usec * 1000; 3236 } 3237 np->n_flag |= NCHG; 3238 if (vp->v_usecount == 1 && 3239 (vp->v_mount->mnt_flag & MNT_RDONLY) == 0) { 3240 VATTR_NULL(&vattr); 3241 if (np->n_flag & NACC) 3242 vattr.va_atime = np->n_atim; 3243 if (np->n_flag & NUPD) 3244 vattr.va_mtime = np->n_mtim; 3245 (void)VOP_SETATTR(vp, &vattr, ap->a_cred, ap->a_p); 3246 } 3247 } 3248 return (VOCALL(fifo_vnodeop_p, VOFFSET(vop_close), ap)); 3249 } 3250
Indexes created Mon Oct 13 16:09:52 GMT 2025