nfs_vnops.c revision 1.1.1.3
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 8.16 (Berkeley) 5/27/95 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 else 489 error = nfs_vinvalbuf(vp, V_SAVE, ap->a_cred, ap->a_p, 1); 490 np->n_attrstamp = 0; 491 } 492 if (np->n_flag & NWRITEERR) { 493 np->n_flag &= ~NWRITEERR; 494 error = np->n_error; 495 } 496 } 497 return (error); 498 } 499 500 /* 501 * nfs getattr call from vfs. 502 */ 503 int 504 nfs_getattr(ap) 505 struct vop_getattr_args /* { 506 struct vnode *a_vp; 507 struct vattr *a_vap; 508 struct ucred *a_cred; 509 struct proc *a_p; 510 } */ *ap; 511 { 512 register struct vnode *vp = ap->a_vp; 513 register struct nfsnode *np = VTONFS(vp); 514 register caddr_t cp; 515 register u_long *tl; 516 register int t1, t2; 517 caddr_t bpos, dpos; 518 int error = 0; 519 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 520 int v3 = NFS_ISV3(vp); 521 522 /* 523 * Update local times for special files. 524 */ 525 if (np->n_flag & (NACC | NUPD)) 526 np->n_flag |= NCHG; 527 /* 528 * First look in the cache. 529 */ 530 if (nfs_getattrcache(vp, ap->a_vap) == 0) 531 return (0); 532 nfsstats.rpccnt[NFSPROC_GETATTR]++; 533 nfsm_reqhead(vp, NFSPROC_GETATTR, NFSX_FH(v3)); 534 nfsm_fhtom(vp, v3); 535 nfsm_request(vp, NFSPROC_GETATTR, ap->a_p, ap->a_cred); 536 if (!error) 537 nfsm_loadattr(vp, ap->a_vap); 538 nfsm_reqdone; 539 return (error); 540 } 541 542 /* 543 * nfs setattr call. 544 */ 545 int 546 nfs_setattr(ap) 547 struct vop_setattr_args /* { 548 struct vnodeop_desc *a_desc; 549 struct vnode *a_vp; 550 struct vattr *a_vap; 551 struct ucred *a_cred; 552 struct proc *a_p; 553 } */ *ap; 554 { 555 register struct vnode *vp = ap->a_vp; 556 register struct nfsnode *np = VTONFS(vp); 557 register struct vattr *vap = ap->a_vap; 558 int error = 0; 559 u_quad_t tsize; 560 561 #ifndef nolint 562 tsize = (u_quad_t)0; 563 #endif 564 /* 565 * Disallow write attempts if the filesystem is mounted read-only. 566 */ 567 if ((vap->va_flags != VNOVAL || vap->va_uid != (uid_t)VNOVAL || 568 vap->va_gid != (gid_t)VNOVAL || vap->va_atime.ts_sec != VNOVAL || 569 vap->va_mtime.ts_sec != VNOVAL || vap->va_mode != (mode_t)VNOVAL) && 570 (vp->v_mount->mnt_flag & MNT_RDONLY)) 571 return (EROFS); 572 if (vap->va_size != VNOVAL) { 573 switch (vp->v_type) { 574 case VDIR: 575 return (EISDIR); 576 case VCHR: 577 case VBLK: 578 case VSOCK: 579 case VFIFO: 580 if (vap->va_mtime.ts_sec == VNOVAL && 581 vap->va_atime.ts_sec == VNOVAL && 582 vap->va_mode == (u_short)VNOVAL && 583 vap->va_uid == (uid_t)VNOVAL && 584 vap->va_gid == (gid_t)VNOVAL) 585 return (0); 586 vap->va_size = VNOVAL; 587 break; 588 default: 589 /* 590 * Disallow write attempts if the filesystem is 591 * mounted read-only. 592 */ 593 if (vp->v_mount->mnt_flag & MNT_RDONLY) 594 return (EROFS); 595 if (np->n_flag & NMODIFIED) { 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 } 605 tsize = np->n_size; 606 np->n_size = np->n_vattr.va_size = vap->va_size; 607 vnode_pager_setsize(vp, (u_long)np->n_size); 608 }; 609 } else if ((vap->va_mtime.ts_sec != VNOVAL || 610 vap->va_atime.ts_sec != VNOVAL) && (np->n_flag & NMODIFIED) && 611 vp->v_type == VREG && 612 (error = nfs_vinvalbuf(vp, V_SAVE, ap->a_cred, 613 ap->a_p, 1)) == EINTR) 614 return (error); 615 error = nfs_setattrrpc(vp, vap, ap->a_cred, ap->a_p); 616 if (error) { 617 np->n_size = np->n_vattr.va_size = tsize; 618 vnode_pager_setsize(vp, (u_long)np->n_size); 619 } 620 return (error); 621 } 622 623 /* 624 * Do an nfs setattr rpc. 625 */ 626 int 627 nfs_setattrrpc(vp, vap, cred, procp) 628 register struct vnode *vp; 629 register struct vattr *vap; 630 struct ucred *cred; 631 struct proc *procp; 632 { 633 register struct nfsv2_sattr *sp; 634 register caddr_t cp; 635 register long t1, t2; 636 caddr_t bpos, dpos, cp2; 637 u_long *tl; 638 int error = 0, wccflag = NFSV3_WCCRATTR; 639 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 640 u_quad_t frev; 641 int v3 = NFS_ISV3(vp); 642 643 nfsstats.rpccnt[NFSPROC_SETATTR]++; 644 nfsm_reqhead(vp, NFSPROC_SETATTR, NFSX_FH(v3) + NFSX_SATTR(v3)); 645 nfsm_fhtom(vp, v3); 646 if (v3) { 647 if (vap->va_mode != (u_short)VNOVAL) { 648 nfsm_build(tl, u_long *, 2 * NFSX_UNSIGNED); 649 *tl++ = nfs_true; 650 *tl = txdr_unsigned(vap->va_mode); 651 } else { 652 nfsm_build(tl, u_long *, NFSX_UNSIGNED); 653 *tl = nfs_false; 654 } 655 if (vap->va_uid != (uid_t)VNOVAL) { 656 nfsm_build(tl, u_long *, 2 * NFSX_UNSIGNED); 657 *tl++ = nfs_true; 658 *tl = txdr_unsigned(vap->va_uid); 659 } else { 660 nfsm_build(tl, u_long *, NFSX_UNSIGNED); 661 *tl = nfs_false; 662 } 663 if (vap->va_gid != (gid_t)VNOVAL) { 664 nfsm_build(tl, u_long *, 2 * NFSX_UNSIGNED); 665 *tl++ = nfs_true; 666 *tl = txdr_unsigned(vap->va_gid); 667 } else { 668 nfsm_build(tl, u_long *, NFSX_UNSIGNED); 669 *tl = nfs_false; 670 } 671 if (vap->va_size != VNOVAL) { 672 nfsm_build(tl, u_long *, 3 * NFSX_UNSIGNED); 673 *tl++ = nfs_true; 674 txdr_hyper(&vap->va_size, tl); 675 } else { 676 nfsm_build(tl, u_long *, NFSX_UNSIGNED); 677 *tl = nfs_false; 678 } 679 if (vap->va_atime.ts_sec != VNOVAL) { 680 if (vap->va_atime.ts_sec != time.tv_sec) { 681 nfsm_build(tl, u_long *, 3 * NFSX_UNSIGNED); 682 *tl++ = txdr_unsigned(NFSV3SATTRTIME_TOCLIENT); 683 txdr_nfsv3time(&vap->va_atime, tl); 684 } else { 685 nfsm_build(tl, u_long *, NFSX_UNSIGNED); 686 *tl = txdr_unsigned(NFSV3SATTRTIME_TOSERVER); 687 } 688 } else { 689 nfsm_build(tl, u_long *, NFSX_UNSIGNED); 690 *tl = txdr_unsigned(NFSV3SATTRTIME_DONTCHANGE); 691 } 692 if (vap->va_mtime.ts_sec != VNOVAL) { 693 if (vap->va_mtime.ts_sec != time.tv_sec) { 694 nfsm_build(tl, u_long *, 3 * NFSX_UNSIGNED); 695 *tl++ = txdr_unsigned(NFSV3SATTRTIME_TOCLIENT); 696 txdr_nfsv3time(&vap->va_atime, tl); 697 } else { 698 nfsm_build(tl, u_long *, NFSX_UNSIGNED); 699 *tl = txdr_unsigned(NFSV3SATTRTIME_TOSERVER); 700 } 701 } else { 702 nfsm_build(tl, u_long *, NFSX_UNSIGNED); 703 *tl = txdr_unsigned(NFSV3SATTRTIME_DONTCHANGE); 704 } 705 nfsm_build(tl, u_long *, NFSX_UNSIGNED); 706 *tl = nfs_false; 707 } else { 708 nfsm_build(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 709 if (vap->va_mode == (u_short)VNOVAL) 710 sp->sa_mode = VNOVAL; 711 else 712 sp->sa_mode = vtonfsv2_mode(vp->v_type, vap->va_mode); 713 if (vap->va_uid == (uid_t)VNOVAL) 714 sp->sa_uid = VNOVAL; 715 else 716 sp->sa_uid = txdr_unsigned(vap->va_uid); 717 if (vap->va_gid == (gid_t)VNOVAL) 718 sp->sa_gid = VNOVAL; 719 else 720 sp->sa_gid = txdr_unsigned(vap->va_gid); 721 sp->sa_size = txdr_unsigned(vap->va_size); 722 txdr_nfsv2time(&vap->va_atime, &sp->sa_atime); 723 txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime); 724 } 725 nfsm_request(vp, NFSPROC_SETATTR, procp, cred); 726 if (v3) { 727 nfsm_wcc_data(vp, wccflag); 728 } else 729 nfsm_loadattr(vp, (struct vattr *)0); 730 nfsm_reqdone; 731 return (error); 732 } 733 734 /* 735 * nfs lookup call, one step at a time... 736 * First look in cache 737 * If not found, unlock the directory nfsnode and do the rpc 738 */ 739 int 740 nfs_lookup(ap) 741 struct vop_lookup_args /* { 742 struct vnodeop_desc *a_desc; 743 struct vnode *a_dvp; 744 struct vnode **a_vpp; 745 struct componentname *a_cnp; 746 } */ *ap; 747 { 748 register struct componentname *cnp = ap->a_cnp; 749 register struct vnode *dvp = ap->a_dvp; 750 register struct vnode **vpp = ap->a_vpp; 751 register int flags = cnp->cn_flags; 752 register struct proc *p = cnp->cn_proc; 753 register struct vnode *newvp; 754 register u_long *tl; 755 register caddr_t cp; 756 register long t1, t2; 757 struct nfsmount *nmp; 758 caddr_t bpos, dpos, cp2; 759 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 760 long len; 761 nfsfh_t *fhp; 762 struct nfsnode *np; 763 int lockparent, wantparent, error = 0, attrflag, fhsize; 764 int v3 = NFS_ISV3(dvp); 765 766 if ((flags & ISLASTCN) && (dvp->v_mount->mnt_flag & MNT_RDONLY) && 767 (cnp->cn_nameiop == DELETE || cnp->cn_nameiop == RENAME)) 768 return (EROFS); 769 *vpp = NULLVP; 770 if (dvp->v_type != VDIR) 771 return (ENOTDIR); 772 lockparent = flags & LOCKPARENT; 773 wantparent = flags & (LOCKPARENT|WANTPARENT); 774 nmp = VFSTONFS(dvp->v_mount); 775 np = VTONFS(dvp); 776 if ((error = cache_lookup(dvp, vpp, cnp)) && error != ENOENT) { 777 struct vattr vattr; 778 int vpid; 779 780 newvp = *vpp; 781 vpid = newvp->v_id; 782 /* 783 * See the comment starting `Step through' in ufs/ufs_lookup.c 784 * for an explanation of the locking protocol 785 */ 786 if (dvp == newvp) { 787 VREF(newvp); 788 error = 0; 789 } else 790 error = vget(newvp, LK_EXCLUSIVE, p); 791 if (!error) { 792 if (vpid == newvp->v_id) { 793 if (!VOP_GETATTR(newvp, &vattr, cnp->cn_cred, cnp->cn_proc) 794 && vattr.va_ctime.ts_sec == VTONFS(newvp)->n_ctime) { 795 nfsstats.lookupcache_hits++; 796 if (cnp->cn_nameiop != LOOKUP && 797 (flags & ISLASTCN)) 798 cnp->cn_flags |= SAVENAME; 799 return (0); 800 } 801 cache_purge(newvp); 802 } 803 vrele(newvp); 804 } 805 *vpp = NULLVP; 806 } 807 error = 0; 808 newvp = NULLVP; 809 nfsstats.lookupcache_misses++; 810 nfsstats.rpccnt[NFSPROC_LOOKUP]++; 811 len = cnp->cn_namelen; 812 nfsm_reqhead(dvp, NFSPROC_LOOKUP, 813 NFSX_FH(v3) + NFSX_UNSIGNED + nfsm_rndup(len)); 814 nfsm_fhtom(dvp, v3); 815 nfsm_strtom(cnp->cn_nameptr, len, NFS_MAXNAMLEN); 816 nfsm_request(dvp, NFSPROC_LOOKUP, cnp->cn_proc, cnp->cn_cred); 817 if (error) { 818 nfsm_postop_attr(dvp, attrflag); 819 m_freem(mrep); 820 goto nfsmout; 821 } 822 nfsm_getfh(fhp, fhsize, v3); 823 824 /* 825 * Handle RENAME case... 826 */ 827 if (cnp->cn_nameiop == RENAME && wantparent && (flags & ISLASTCN)) { 828 if (NFS_CMPFH(np, fhp, fhsize)) { 829 m_freem(mrep); 830 return (EISDIR); 831 } 832 if (error = nfs_nget(dvp->v_mount, fhp, fhsize, &np)) { 833 m_freem(mrep); 834 return (error); 835 } 836 newvp = NFSTOV(np); 837 if (v3) { 838 nfsm_postop_attr(newvp, attrflag); 839 nfsm_postop_attr(dvp, attrflag); 840 } else 841 nfsm_loadattr(newvp, (struct vattr *)0); 842 *vpp = newvp; 843 m_freem(mrep); 844 cnp->cn_flags |= SAVENAME; 845 return (0); 846 } 847 848 if (NFS_CMPFH(np, fhp, fhsize)) { 849 VREF(dvp); 850 newvp = dvp; 851 } else { 852 if (error = nfs_nget(dvp->v_mount, fhp, fhsize, &np)) { 853 m_freem(mrep); 854 return (error); 855 } 856 newvp = NFSTOV(np); 857 } 858 if (v3) { 859 nfsm_postop_attr(newvp, attrflag); 860 nfsm_postop_attr(dvp, attrflag); 861 } else 862 nfsm_loadattr(newvp, (struct vattr *)0); 863 if (cnp->cn_nameiop != LOOKUP && (flags & ISLASTCN)) 864 cnp->cn_flags |= SAVENAME; 865 if ((cnp->cn_flags & MAKEENTRY) && 866 (cnp->cn_nameiop != DELETE || !(flags & ISLASTCN))) { 867 np->n_ctime = np->n_vattr.va_ctime.ts_sec; 868 cache_enter(dvp, newvp, cnp); 869 } 870 *vpp = newvp; 871 nfsm_reqdone; 872 if (error) { 873 if (newvp != NULLVP) 874 vrele(newvp); 875 if ((cnp->cn_nameiop == CREATE || cnp->cn_nameiop == RENAME) && 876 (flags & ISLASTCN) && error == ENOENT) { 877 if (dvp->v_mount->mnt_flag & MNT_RDONLY) 878 error = EROFS; 879 else 880 error = EJUSTRETURN; 881 } 882 if (cnp->cn_nameiop != LOOKUP && (flags & ISLASTCN)) 883 cnp->cn_flags |= SAVENAME; 884 } 885 return (error); 886 } 887 888 /* 889 * nfs read call. 890 * Just call nfs_bioread() to do the work. 891 */ 892 int 893 nfs_read(ap) 894 struct vop_read_args /* { 895 struct vnode *a_vp; 896 struct uio *a_uio; 897 int a_ioflag; 898 struct ucred *a_cred; 899 } */ *ap; 900 { 901 register struct vnode *vp = ap->a_vp; 902 903 if (vp->v_type != VREG) 904 return (EPERM); 905 return (nfs_bioread(vp, ap->a_uio, ap->a_ioflag, ap->a_cred)); 906 } 907 908 /* 909 * nfs readlink call 910 */ 911 int 912 nfs_readlink(ap) 913 struct vop_readlink_args /* { 914 struct vnode *a_vp; 915 struct uio *a_uio; 916 struct ucred *a_cred; 917 } */ *ap; 918 { 919 register struct vnode *vp = ap->a_vp; 920 921 if (vp->v_type != VLNK) 922 return (EPERM); 923 return (nfs_bioread(vp, ap->a_uio, 0, ap->a_cred)); 924 } 925 926 /* 927 * Do a readlink rpc. 928 * Called by nfs_doio() from below the buffer cache. 929 */ 930 int 931 nfs_readlinkrpc(vp, uiop, cred) 932 register struct vnode *vp; 933 struct uio *uiop; 934 struct ucred *cred; 935 { 936 register u_long *tl; 937 register caddr_t cp; 938 register long t1, t2; 939 caddr_t bpos, dpos, cp2; 940 int error = 0, len, attrflag; 941 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 942 int v3 = NFS_ISV3(vp); 943 944 nfsstats.rpccnt[NFSPROC_READLINK]++; 945 nfsm_reqhead(vp, NFSPROC_READLINK, NFSX_FH(v3)); 946 nfsm_fhtom(vp, v3); 947 nfsm_request(vp, NFSPROC_READLINK, uiop->uio_procp, cred); 948 if (v3) 949 nfsm_postop_attr(vp, attrflag); 950 if (!error) { 951 nfsm_strsiz(len, NFS_MAXPATHLEN); 952 nfsm_mtouio(uiop, len); 953 } 954 nfsm_reqdone; 955 return (error); 956 } 957 958 /* 959 * nfs read rpc call 960 * Ditto above 961 */ 962 int 963 nfs_readrpc(vp, uiop, cred) 964 register struct vnode *vp; 965 struct uio *uiop; 966 struct ucred *cred; 967 { 968 register u_long *tl; 969 register caddr_t cp; 970 register long t1, t2; 971 caddr_t bpos, dpos, cp2; 972 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 973 struct nfsmount *nmp; 974 int error = 0, len, retlen, tsiz, eof, attrflag; 975 int v3 = NFS_ISV3(vp); 976 977 #ifndef nolint 978 eof = 0; 979 #endif 980 nmp = VFSTONFS(vp->v_mount); 981 tsiz = uiop->uio_resid; 982 if (uiop->uio_offset + tsiz > 0xffffffff && !v3) 983 return (EFBIG); 984 while (tsiz > 0) { 985 nfsstats.rpccnt[NFSPROC_READ]++; 986 len = (tsiz > nmp->nm_rsize) ? nmp->nm_rsize : tsiz; 987 nfsm_reqhead(vp, NFSPROC_READ, NFSX_FH(v3) + NFSX_UNSIGNED * 3); 988 nfsm_fhtom(vp, v3); 989 nfsm_build(tl, u_long *, NFSX_UNSIGNED * 3); 990 if (v3) { 991 txdr_hyper(&uiop->uio_offset, tl); 992 *(tl + 2) = txdr_unsigned(len); 993 } else { 994 *tl++ = txdr_unsigned(uiop->uio_offset); 995 *tl++ = txdr_unsigned(len); 996 *tl = 0; 997 } 998 nfsm_request(vp, NFSPROC_READ, uiop->uio_procp, cred); 999 if (v3) { 1000 nfsm_postop_attr(vp, attrflag); 1001 if (error) { 1002 m_freem(mrep); 1003 goto nfsmout; 1004 } 1005 nfsm_dissect(tl, u_long *, 2 * NFSX_UNSIGNED); 1006 eof = fxdr_unsigned(int, *(tl + 1)); 1007 } else 1008 nfsm_loadattr(vp, (struct vattr *)0); 1009 nfsm_strsiz(retlen, nmp->nm_rsize); 1010 nfsm_mtouio(uiop, retlen); 1011 m_freem(mrep); 1012 tsiz -= retlen; 1013 if (v3) { 1014 if (eof || retlen == 0) 1015 tsiz = 0; 1016 } else if (retlen < len) 1017 tsiz = 0; 1018 } 1019 nfsmout: 1020 return (error); 1021 } 1022 1023 /* 1024 * nfs write call 1025 */ 1026 int 1027 nfs_writerpc(vp, uiop, cred, iomode, must_commit) 1028 register struct vnode *vp; 1029 register struct uio *uiop; 1030 struct ucred *cred; 1031 int *iomode, *must_commit; 1032 { 1033 register u_long *tl; 1034 register caddr_t cp; 1035 register int t1, t2, backup; 1036 caddr_t bpos, dpos, cp2; 1037 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 1038 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 1039 struct nfsnode *np = VTONFS(vp); 1040 u_quad_t frev; 1041 int error = 0, len, tsiz, wccflag = NFSV3_WCCRATTR, rlen, commit; 1042 int v3 = NFS_ISV3(vp), committed = NFSV3WRITE_FILESYNC; 1043 1044 #ifndef DIAGNOSTIC 1045 if (uiop->uio_iovcnt != 1) 1046 panic("nfs: writerpc iovcnt > 1"); 1047 #endif 1048 *must_commit = 0; 1049 tsiz = uiop->uio_resid; 1050 if (uiop->uio_offset + tsiz > 0xffffffff && !v3) 1051 return (EFBIG); 1052 while (tsiz > 0) { 1053 nfsstats.rpccnt[NFSPROC_WRITE]++; 1054 len = (tsiz > nmp->nm_wsize) ? nmp->nm_wsize : tsiz; 1055 nfsm_reqhead(vp, NFSPROC_WRITE, 1056 NFSX_FH(v3) + 5 * NFSX_UNSIGNED + nfsm_rndup(len)); 1057 nfsm_fhtom(vp, v3); 1058 if (v3) { 1059 nfsm_build(tl, u_long *, 5 * NFSX_UNSIGNED); 1060 txdr_hyper(&uiop->uio_offset, tl); 1061 tl += 2; 1062 *tl++ = txdr_unsigned(len); 1063 *tl++ = txdr_unsigned(*iomode); 1064 } else { 1065 nfsm_build(tl, u_long *, 4 * NFSX_UNSIGNED); 1066 *++tl = txdr_unsigned(uiop->uio_offset); 1067 tl += 2; 1068 } 1069 *tl = txdr_unsigned(len); 1070 nfsm_uiotom(uiop, len); 1071 nfsm_request(vp, NFSPROC_WRITE, uiop->uio_procp, cred); 1072 if (v3) { 1073 wccflag = NFSV3_WCCCHK; 1074 nfsm_wcc_data(vp, wccflag); 1075 if (!error) { 1076 nfsm_dissect(tl, u_long *, 2 * NFSX_UNSIGNED + 1077 NFSX_V3WRITEVERF); 1078 rlen = fxdr_unsigned(int, *tl++); 1079 if (rlen == 0) { 1080 error = NFSERR_IO; 1081 break; 1082 } else if (rlen < len) { 1083 backup = len - rlen; 1084 uiop->uio_iov->iov_base -= backup; 1085 uiop->uio_iov->iov_len += backup; 1086 uiop->uio_offset -= backup; 1087 uiop->uio_resid += backup; 1088 len = rlen; 1089 } 1090 commit = fxdr_unsigned(int, *tl++); 1091 1092 /* 1093 * Return the lowest committment level 1094 * obtained by any of the RPCs. 1095 */ 1096 if (committed == NFSV3WRITE_FILESYNC) 1097 committed = commit; 1098 else if (committed == NFSV3WRITE_DATASYNC && 1099 commit == NFSV3WRITE_UNSTABLE) 1100 committed = commit; 1101 if ((nmp->nm_flag & NFSMNT_HASWRITEVERF) == 0) { 1102 bcopy((caddr_t)tl, (caddr_t)nmp->nm_verf, 1103 NFSX_V3WRITEVERF); 1104 nmp->nm_flag |= NFSMNT_HASWRITEVERF; 1105 } else if (bcmp((caddr_t)tl, 1106 (caddr_t)nmp->nm_verf, NFSX_V3WRITEVERF)) { 1107 *must_commit = 1; 1108 bcopy((caddr_t)tl, (caddr_t)nmp->nm_verf, 1109 NFSX_V3WRITEVERF); 1110 } 1111 } 1112 } else 1113 nfsm_loadattr(vp, (struct vattr *)0); 1114 if (wccflag) 1115 VTONFS(vp)->n_mtime = VTONFS(vp)->n_vattr.va_mtime.ts_sec; 1116 m_freem(mrep); 1117 tsiz -= len; 1118 } 1119 nfsmout: 1120 *iomode = committed; 1121 if (error) 1122 uiop->uio_resid = tsiz; 1123 return (error); 1124 } 1125 1126 /* 1127 * nfs mknod rpc 1128 * For NFS v2 this is a kludge. Use a create rpc but with the IFMT bits of the 1129 * mode set to specify the file type and the size field for rdev. 1130 */ 1131 int 1132 nfs_mknodrpc(dvp, vpp, cnp, vap) 1133 register struct vnode *dvp; 1134 register struct vnode **vpp; 1135 register struct componentname *cnp; 1136 register struct vattr *vap; 1137 { 1138 register struct nfsv2_sattr *sp; 1139 register struct nfsv3_sattr *sp3; 1140 register u_long *tl; 1141 register caddr_t cp; 1142 register long t1, t2; 1143 struct vnode *newvp = (struct vnode *)0; 1144 struct nfsnode *np; 1145 struct vattr vattr; 1146 char *cp2; 1147 caddr_t bpos, dpos; 1148 int error = 0, wccflag = NFSV3_WCCRATTR, gotvp = 0; 1149 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 1150 u_long rdev; 1151 int v3 = NFS_ISV3(dvp); 1152 1153 if (vap->va_type == VCHR || vap->va_type == VBLK) 1154 rdev = txdr_unsigned(vap->va_rdev); 1155 else if (vap->va_type == VFIFO || vap->va_type == VSOCK) 1156 rdev = 0xffffffff; 1157 else { 1158 VOP_ABORTOP(dvp, cnp); 1159 vput(dvp); 1160 return (EOPNOTSUPP); 1161 } 1162 if (error = VOP_GETATTR(dvp, &vattr, cnp->cn_cred, cnp->cn_proc)) { 1163 VOP_ABORTOP(dvp, cnp); 1164 vput(dvp); 1165 return (error); 1166 } 1167 nfsstats.rpccnt[NFSPROC_MKNOD]++; 1168 nfsm_reqhead(dvp, NFSPROC_MKNOD, NFSX_FH(v3) + 4 * NFSX_UNSIGNED + 1169 + nfsm_rndup(cnp->cn_namelen) + NFSX_SATTR(v3)); 1170 nfsm_fhtom(dvp, v3); 1171 nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN); 1172 if (v3) { 1173 nfsm_build(tl, u_long *, NFSX_UNSIGNED + NFSX_V3SRVSATTR); 1174 *tl++ = vtonfsv3_type(vap->va_type); 1175 sp3 = (struct nfsv3_sattr *)tl; 1176 nfsm_v3sattr(sp3, vap, cnp->cn_cred->cr_uid, vattr.va_gid); 1177 if (vap->va_type == VCHR || vap->va_type == VBLK) { 1178 nfsm_build(tl, u_long *, 2 * NFSX_UNSIGNED); 1179 *tl++ = txdr_unsigned(major(vap->va_rdev)); 1180 *tl = txdr_unsigned(minor(vap->va_rdev)); 1181 } 1182 } else { 1183 nfsm_build(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 1184 sp->sa_mode = vtonfsv2_mode(vap->va_type, vap->va_mode); 1185 sp->sa_uid = txdr_unsigned(cnp->cn_cred->cr_uid); 1186 sp->sa_gid = txdr_unsigned(vattr.va_gid); 1187 sp->sa_size = rdev; 1188 txdr_nfsv2time(&vap->va_atime, &sp->sa_atime); 1189 txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime); 1190 } 1191 nfsm_request(dvp, NFSPROC_MKNOD, cnp->cn_proc, cnp->cn_cred); 1192 if (!error) { 1193 nfsm_mtofh(dvp, newvp, v3, gotvp); 1194 if (!gotvp) { 1195 if (newvp) { 1196 vrele(newvp); 1197 newvp = (struct vnode *)0; 1198 } 1199 error = nfs_lookitup(dvp, cnp->cn_nameptr, 1200 cnp->cn_namelen, cnp->cn_cred, cnp->cn_proc, &np); 1201 if (!error) 1202 newvp = NFSTOV(np); 1203 } 1204 } 1205 if (v3) 1206 nfsm_wcc_data(dvp, wccflag); 1207 nfsm_reqdone; 1208 if (error) { 1209 if (newvp) 1210 vrele(newvp); 1211 } else { 1212 if (cnp->cn_flags & MAKEENTRY) 1213 cache_enter(dvp, newvp, cnp); 1214 *vpp = newvp; 1215 } 1216 FREE(cnp->cn_pnbuf, M_NAMEI); 1217 VTONFS(dvp)->n_flag |= NMODIFIED; 1218 if (!wccflag) 1219 VTONFS(dvp)->n_attrstamp = 0; 1220 vrele(dvp); 1221 return (error); 1222 } 1223 1224 /* 1225 * nfs mknod vop 1226 * just call nfs_mknodrpc() to do the work. 1227 */ 1228 /* ARGSUSED */ 1229 int 1230 nfs_mknod(ap) 1231 struct vop_mknod_args /* { 1232 struct vnode *a_dvp; 1233 struct vnode **a_vpp; 1234 struct componentname *a_cnp; 1235 struct vattr *a_vap; 1236 } */ *ap; 1237 { 1238 struct vnode *newvp; 1239 int error; 1240 1241 error = nfs_mknodrpc(ap->a_dvp, &newvp, ap->a_cnp, ap->a_vap); 1242 if (!error) 1243 vrele(newvp); 1244 return (error); 1245 } 1246 1247 static u_long create_verf; 1248 /* 1249 * nfs file create call 1250 */ 1251 int 1252 nfs_create(ap) 1253 struct vop_create_args /* { 1254 struct vnode *a_dvp; 1255 struct vnode **a_vpp; 1256 struct componentname *a_cnp; 1257 struct vattr *a_vap; 1258 } */ *ap; 1259 { 1260 register struct vnode *dvp = ap->a_dvp; 1261 register struct vattr *vap = ap->a_vap; 1262 register struct componentname *cnp = ap->a_cnp; 1263 register struct nfsv2_sattr *sp; 1264 register struct nfsv3_sattr *sp3; 1265 register u_long *tl; 1266 register caddr_t cp; 1267 register long t1, t2; 1268 struct nfsnode *np = (struct nfsnode *)0; 1269 struct vnode *newvp = (struct vnode *)0; 1270 caddr_t bpos, dpos, cp2; 1271 int error = 0, wccflag = NFSV3_WCCRATTR, gotvp = 0, fmode = 0; 1272 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 1273 struct vattr vattr; 1274 int v3 = NFS_ISV3(dvp); 1275 1276 /* 1277 * Oops, not for me.. 1278 */ 1279 if (vap->va_type == VSOCK) 1280 return (nfs_mknodrpc(dvp, ap->a_vpp, cnp, vap)); 1281 1282 if (error = VOP_GETATTR(dvp, &vattr, cnp->cn_cred, cnp->cn_proc)) { 1283 VOP_ABORTOP(dvp, cnp); 1284 vput(dvp); 1285 return (error); 1286 } 1287 if (vap->va_vaflags & VA_EXCLUSIVE) 1288 fmode |= O_EXCL; 1289 again: 1290 nfsstats.rpccnt[NFSPROC_CREATE]++; 1291 nfsm_reqhead(dvp, NFSPROC_CREATE, NFSX_FH(v3) + 2 * NFSX_UNSIGNED + 1292 nfsm_rndup(cnp->cn_namelen) + NFSX_SATTR(v3)); 1293 nfsm_fhtom(dvp, v3); 1294 nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN); 1295 if (v3) { 1296 nfsm_build(tl, u_long *, NFSX_UNSIGNED); 1297 if (fmode & O_EXCL) { 1298 *tl = txdr_unsigned(NFSV3CREATE_EXCLUSIVE); 1299 nfsm_build(tl, u_long *, NFSX_V3CREATEVERF); 1300 if (in_ifaddr) 1301 *tl++ = IA_SIN(in_ifaddr)->sin_addr.s_addr; 1302 else 1303 *tl++ = create_verf; 1304 *tl = ++create_verf; 1305 } else { 1306 *tl = txdr_unsigned(NFSV3CREATE_UNCHECKED); 1307 nfsm_build(tl, u_long *, NFSX_V3SRVSATTR); 1308 sp3 = (struct nfsv3_sattr *)tl; 1309 nfsm_v3sattr(sp3, vap, cnp->cn_cred->cr_uid, vattr.va_gid); 1310 } 1311 } else { 1312 nfsm_build(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 1313 sp->sa_mode = vtonfsv2_mode(vap->va_type, vap->va_mode); 1314 sp->sa_uid = txdr_unsigned(cnp->cn_cred->cr_uid); 1315 sp->sa_gid = txdr_unsigned(vattr.va_gid); 1316 sp->sa_size = 0; 1317 txdr_nfsv2time(&vap->va_atime, &sp->sa_atime); 1318 txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime); 1319 } 1320 nfsm_request(dvp, NFSPROC_CREATE, cnp->cn_proc, cnp->cn_cred); 1321 if (!error) { 1322 nfsm_mtofh(dvp, newvp, v3, gotvp); 1323 if (!gotvp) { 1324 if (newvp) { 1325 vrele(newvp); 1326 newvp = (struct vnode *)0; 1327 } 1328 error = nfs_lookitup(dvp, cnp->cn_nameptr, 1329 cnp->cn_namelen, cnp->cn_cred, cnp->cn_proc, &np); 1330 if (!error) 1331 newvp = NFSTOV(np); 1332 } 1333 } 1334 if (v3) 1335 nfsm_wcc_data(dvp, wccflag); 1336 nfsm_reqdone; 1337 if (error) { 1338 if (v3 && (fmode & O_EXCL) && error == NFSERR_NOTSUPP) { 1339 fmode &= ~O_EXCL; 1340 goto again; 1341 } 1342 if (newvp) 1343 vrele(newvp); 1344 } else if (v3 && (fmode & O_EXCL)) 1345 error = nfs_setattrrpc(newvp, vap, cnp->cn_cred, cnp->cn_proc); 1346 if (!error) { 1347 if (cnp->cn_flags & MAKEENTRY) 1348 cache_enter(dvp, newvp, cnp); 1349 *ap->a_vpp = newvp; 1350 } 1351 FREE(cnp->cn_pnbuf, M_NAMEI); 1352 VTONFS(dvp)->n_flag |= NMODIFIED; 1353 if (!wccflag) 1354 VTONFS(dvp)->n_attrstamp = 0; 1355 vrele(dvp); 1356 return (error); 1357 } 1358 1359 /* 1360 * nfs file remove call 1361 * To try and make nfs semantics closer to ufs semantics, a file that has 1362 * other processes using the vnode is renamed instead of removed and then 1363 * removed later on the last close. 1364 * - If v_usecount > 1 1365 * If a rename is not already in the works 1366 * call nfs_sillyrename() to set it up 1367 * else 1368 * do the remove rpc 1369 */ 1370 int 1371 nfs_remove(ap) 1372 struct vop_remove_args /* { 1373 struct vnodeop_desc *a_desc; 1374 struct vnode * a_dvp; 1375 struct vnode * a_vp; 1376 struct componentname * a_cnp; 1377 } */ *ap; 1378 { 1379 register struct vnode *vp = ap->a_vp; 1380 register struct vnode *dvp = ap->a_dvp; 1381 register struct componentname *cnp = ap->a_cnp; 1382 register struct nfsnode *np = VTONFS(vp); 1383 register u_long *tl; 1384 register caddr_t cp; 1385 register long t2; 1386 caddr_t bpos, dpos; 1387 int error = 0; 1388 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 1389 struct vattr vattr; 1390 int v3 = NFS_ISV3(dvp); 1391 1392 #ifndef DIAGNOSTIC 1393 if ((cnp->cn_flags & HASBUF) == 0) 1394 panic("nfs_remove: no name"); 1395 if (vp->v_usecount < 1) 1396 panic("nfs_remove: bad v_usecount"); 1397 #endif 1398 if (vp->v_usecount == 1 || (np->n_sillyrename && 1399 VOP_GETATTR(vp, &vattr, cnp->cn_cred, cnp->cn_proc) == 0 && 1400 vattr.va_nlink > 1)) { 1401 /* 1402 * Purge the name cache so that the chance of a lookup for 1403 * the name succeeding while the remove is in progress is 1404 * minimized. Without node locking it can still happen, such 1405 * that an I/O op returns ESTALE, but since you get this if 1406 * another host removes the file.. 1407 */ 1408 cache_purge(vp); 1409 /* 1410 * throw away biocache buffers, mainly to avoid 1411 * unnecessary delayed writes later. 1412 */ 1413 error = nfs_vinvalbuf(vp, 0, cnp->cn_cred, cnp->cn_proc, 1); 1414 /* Do the rpc */ 1415 if (error != EINTR) 1416 error = nfs_removerpc(dvp, cnp->cn_nameptr, 1417 cnp->cn_namelen, cnp->cn_cred, cnp->cn_proc); 1418 /* 1419 * Kludge City: If the first reply to the remove rpc is lost.. 1420 * the reply to the retransmitted request will be ENOENT 1421 * since the file was in fact removed 1422 * Therefore, we cheat and return success. 1423 */ 1424 if (error == ENOENT) 1425 error = 0; 1426 } else if (!np->n_sillyrename) 1427 error = nfs_sillyrename(dvp, vp, cnp); 1428 FREE(cnp->cn_pnbuf, M_NAMEI); 1429 np->n_attrstamp = 0; 1430 vrele(dvp); 1431 vrele(vp); 1432 return (error); 1433 } 1434 1435 /* 1436 * nfs file remove rpc called from nfs_inactive 1437 */ 1438 int 1439 nfs_removeit(sp) 1440 register struct sillyrename *sp; 1441 { 1442 1443 return (nfs_removerpc(sp->s_dvp, sp->s_name, sp->s_namlen, sp->s_cred, 1444 (struct proc *)0)); 1445 } 1446 1447 /* 1448 * Nfs remove rpc, called from nfs_remove() and nfs_removeit(). 1449 */ 1450 int 1451 nfs_removerpc(dvp, name, namelen, cred, proc) 1452 register struct vnode *dvp; 1453 char *name; 1454 int namelen; 1455 struct ucred *cred; 1456 struct proc *proc; 1457 { 1458 register u_long *tl; 1459 register caddr_t cp; 1460 register long t1, t2; 1461 caddr_t bpos, dpos, cp2; 1462 int error = 0, wccflag = NFSV3_WCCRATTR; 1463 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 1464 int v3 = NFS_ISV3(dvp); 1465 1466 nfsstats.rpccnt[NFSPROC_REMOVE]++; 1467 nfsm_reqhead(dvp, NFSPROC_REMOVE, 1468 NFSX_FH(v3) + NFSX_UNSIGNED + nfsm_rndup(namelen)); 1469 nfsm_fhtom(dvp, v3); 1470 nfsm_strtom(name, namelen, NFS_MAXNAMLEN); 1471 nfsm_request(dvp, NFSPROC_REMOVE, proc, cred); 1472 if (v3) 1473 nfsm_wcc_data(dvp, wccflag); 1474 nfsm_reqdone; 1475 VTONFS(dvp)->n_flag |= NMODIFIED; 1476 if (!wccflag) 1477 VTONFS(dvp)->n_attrstamp = 0; 1478 return (error); 1479 } 1480 1481 /* 1482 * nfs file rename call 1483 */ 1484 int 1485 nfs_rename(ap) 1486 struct vop_rename_args /* { 1487 struct vnode *a_fdvp; 1488 struct vnode *a_fvp; 1489 struct componentname *a_fcnp; 1490 struct vnode *a_tdvp; 1491 struct vnode *a_tvp; 1492 struct componentname *a_tcnp; 1493 } */ *ap; 1494 { 1495 register struct vnode *fvp = ap->a_fvp; 1496 register struct vnode *tvp = ap->a_tvp; 1497 register struct vnode *fdvp = ap->a_fdvp; 1498 register struct vnode *tdvp = ap->a_tdvp; 1499 register struct componentname *tcnp = ap->a_tcnp; 1500 register struct componentname *fcnp = ap->a_fcnp; 1501 int error; 1502 1503 #ifndef DIAGNOSTIC 1504 if ((tcnp->cn_flags & HASBUF) == 0 || 1505 (fcnp->cn_flags & HASBUF) == 0) 1506 panic("nfs_rename: no name"); 1507 #endif 1508 /* Check for cross-device rename */ 1509 if ((fvp->v_mount != tdvp->v_mount) || 1510 (tvp && (fvp->v_mount != tvp->v_mount))) { 1511 error = EXDEV; 1512 goto out; 1513 } 1514 1515 /* 1516 * If the tvp exists and is in use, sillyrename it before doing the 1517 * rename of the new file over it. 1518 */ 1519 if (tvp && tvp->v_usecount > 1 && !VTONFS(tvp)->n_sillyrename && 1520 !nfs_sillyrename(tdvp, tvp, tcnp)) { 1521 vrele(tvp); 1522 tvp = NULL; 1523 } 1524 1525 error = nfs_renamerpc(fdvp, fcnp->cn_nameptr, fcnp->cn_namelen, 1526 tdvp, tcnp->cn_nameptr, tcnp->cn_namelen, tcnp->cn_cred, 1527 tcnp->cn_proc); 1528 1529 if (fvp->v_type == VDIR) { 1530 if (tvp != NULL && tvp->v_type == VDIR) 1531 cache_purge(tdvp); 1532 cache_purge(fdvp); 1533 } 1534 out: 1535 if (tdvp == tvp) 1536 vrele(tdvp); 1537 else 1538 vput(tdvp); 1539 if (tvp) 1540 vput(tvp); 1541 vrele(fdvp); 1542 vrele(fvp); 1543 /* 1544 * Kludge: Map ENOENT => 0 assuming that it is a reply to a retry. 1545 */ 1546 if (error == ENOENT) 1547 error = 0; 1548 return (error); 1549 } 1550 1551 /* 1552 * nfs file rename rpc called from nfs_remove() above 1553 */ 1554 int 1555 nfs_renameit(sdvp, scnp, sp) 1556 struct vnode *sdvp; 1557 struct componentname *scnp; 1558 register struct sillyrename *sp; 1559 { 1560 return (nfs_renamerpc(sdvp, scnp->cn_nameptr, scnp->cn_namelen, 1561 sdvp, sp->s_name, sp->s_namlen, scnp->cn_cred, scnp->cn_proc)); 1562 } 1563 1564 /* 1565 * Do an nfs rename rpc. Called from nfs_rename() and nfs_renameit(). 1566 */ 1567 int 1568 nfs_renamerpc(fdvp, fnameptr, fnamelen, tdvp, tnameptr, tnamelen, cred, proc) 1569 register struct vnode *fdvp; 1570 char *fnameptr; 1571 int fnamelen; 1572 register struct vnode *tdvp; 1573 char *tnameptr; 1574 int tnamelen; 1575 struct ucred *cred; 1576 struct proc *proc; 1577 { 1578 register u_long *tl; 1579 register caddr_t cp; 1580 register long t1, t2; 1581 caddr_t bpos, dpos, cp2; 1582 int error = 0, fwccflag = NFSV3_WCCRATTR, twccflag = NFSV3_WCCRATTR; 1583 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 1584 int v3 = NFS_ISV3(fdvp); 1585 1586 nfsstats.rpccnt[NFSPROC_RENAME]++; 1587 nfsm_reqhead(fdvp, NFSPROC_RENAME, 1588 (NFSX_FH(v3) + NFSX_UNSIGNED)*2 + nfsm_rndup(fnamelen) + 1589 nfsm_rndup(tnamelen)); 1590 nfsm_fhtom(fdvp, v3); 1591 nfsm_strtom(fnameptr, fnamelen, NFS_MAXNAMLEN); 1592 nfsm_fhtom(tdvp, v3); 1593 nfsm_strtom(tnameptr, tnamelen, NFS_MAXNAMLEN); 1594 nfsm_request(fdvp, NFSPROC_RENAME, proc, cred); 1595 if (v3) { 1596 nfsm_wcc_data(fdvp, fwccflag); 1597 nfsm_wcc_data(tdvp, twccflag); 1598 } 1599 nfsm_reqdone; 1600 VTONFS(fdvp)->n_flag |= NMODIFIED; 1601 VTONFS(tdvp)->n_flag |= NMODIFIED; 1602 if (!fwccflag) 1603 VTONFS(fdvp)->n_attrstamp = 0; 1604 if (!twccflag) 1605 VTONFS(tdvp)->n_attrstamp = 0; 1606 return (error); 1607 } 1608 1609 /* 1610 * nfs hard link create call 1611 */ 1612 int 1613 nfs_link(ap) 1614 struct vop_link_args /* { 1615 struct vnode *a_vp; 1616 struct vnode *a_tdvp; 1617 struct componentname *a_cnp; 1618 } */ *ap; 1619 { 1620 register struct vnode *vp = ap->a_vp; 1621 register struct vnode *tdvp = ap->a_tdvp; 1622 register struct componentname *cnp = ap->a_cnp; 1623 register u_long *tl; 1624 register caddr_t cp; 1625 register long t1, t2; 1626 caddr_t bpos, dpos, cp2; 1627 int error = 0, wccflag = NFSV3_WCCRATTR, attrflag = 0; 1628 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 1629 int v3 = NFS_ISV3(vp); 1630 1631 if (vp->v_mount != tdvp->v_mount) { 1632 /*VOP_ABORTOP(vp, cnp);*/ 1633 if (tdvp == vp) 1634 vrele(tdvp); 1635 else 1636 vput(tdvp); 1637 return (EXDEV); 1638 } 1639 1640 /* 1641 * Push all writes to the server, so that the attribute cache 1642 * doesn't get "out of sync" with the server. 1643 * XXX There should be a better way! 1644 */ 1645 VOP_FSYNC(vp, cnp->cn_cred, MNT_WAIT, cnp->cn_proc); 1646 1647 nfsstats.rpccnt[NFSPROC_LINK]++; 1648 nfsm_reqhead(vp, NFSPROC_LINK, 1649 NFSX_FH(v3)*2 + NFSX_UNSIGNED + nfsm_rndup(cnp->cn_namelen)); 1650 nfsm_fhtom(vp, v3); 1651 nfsm_fhtom(tdvp, v3); 1652 nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN); 1653 nfsm_request(vp, NFSPROC_LINK, cnp->cn_proc, cnp->cn_cred); 1654 if (v3) { 1655 nfsm_postop_attr(vp, attrflag); 1656 nfsm_wcc_data(tdvp, wccflag); 1657 } 1658 nfsm_reqdone; 1659 FREE(cnp->cn_pnbuf, M_NAMEI); 1660 VTONFS(tdvp)->n_flag |= NMODIFIED; 1661 if (!attrflag) 1662 VTONFS(vp)->n_attrstamp = 0; 1663 if (!wccflag) 1664 VTONFS(tdvp)->n_attrstamp = 0; 1665 vrele(tdvp); 1666 /* 1667 * Kludge: Map EEXIST => 0 assuming that it is a reply to a retry. 1668 */ 1669 if (error == EEXIST) 1670 error = 0; 1671 return (error); 1672 } 1673 1674 /* 1675 * nfs symbolic link create call 1676 */ 1677 int 1678 nfs_symlink(ap) 1679 struct vop_symlink_args /* { 1680 struct vnode *a_dvp; 1681 struct vnode **a_vpp; 1682 struct componentname *a_cnp; 1683 struct vattr *a_vap; 1684 char *a_target; 1685 } */ *ap; 1686 { 1687 register struct vnode *dvp = ap->a_dvp; 1688 register struct vattr *vap = ap->a_vap; 1689 register struct componentname *cnp = ap->a_cnp; 1690 register struct nfsv2_sattr *sp; 1691 register struct nfsv3_sattr *sp3; 1692 register u_long *tl; 1693 register caddr_t cp; 1694 register long t1, t2; 1695 caddr_t bpos, dpos, cp2; 1696 int slen, error = 0, wccflag = NFSV3_WCCRATTR, gotvp; 1697 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 1698 struct vnode *newvp = (struct vnode *)0; 1699 int v3 = NFS_ISV3(dvp); 1700 1701 nfsstats.rpccnt[NFSPROC_SYMLINK]++; 1702 slen = strlen(ap->a_target); 1703 nfsm_reqhead(dvp, NFSPROC_SYMLINK, NFSX_FH(v3) + 2*NFSX_UNSIGNED + 1704 nfsm_rndup(cnp->cn_namelen) + nfsm_rndup(slen) + NFSX_SATTR(v3)); 1705 nfsm_fhtom(dvp, v3); 1706 nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN); 1707 if (v3) { 1708 nfsm_build(sp3, struct nfsv3_sattr *, NFSX_V3SRVSATTR); 1709 nfsm_v3sattr(sp3, vap, cnp->cn_cred->cr_uid, 1710 cnp->cn_cred->cr_gid); 1711 } 1712 nfsm_strtom(ap->a_target, slen, NFS_MAXPATHLEN); 1713 if (!v3) { 1714 nfsm_build(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 1715 sp->sa_mode = vtonfsv2_mode(VLNK, vap->va_mode); 1716 sp->sa_uid = txdr_unsigned(cnp->cn_cred->cr_uid); 1717 sp->sa_gid = txdr_unsigned(cnp->cn_cred->cr_gid); 1718 sp->sa_size = -1; 1719 txdr_nfsv2time(&vap->va_atime, &sp->sa_atime); 1720 txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime); 1721 } 1722 nfsm_request(dvp, NFSPROC_SYMLINK, cnp->cn_proc, cnp->cn_cred); 1723 if (v3) { 1724 if (!error) 1725 nfsm_mtofh(dvp, newvp, v3, gotvp); 1726 nfsm_wcc_data(dvp, wccflag); 1727 } 1728 nfsm_reqdone; 1729 if (newvp) 1730 vrele(newvp); 1731 FREE(cnp->cn_pnbuf, M_NAMEI); 1732 VTONFS(dvp)->n_flag |= NMODIFIED; 1733 if (!wccflag) 1734 VTONFS(dvp)->n_attrstamp = 0; 1735 vrele(dvp); 1736 /* 1737 * Kludge: Map EEXIST => 0 assuming that it is a reply to a retry. 1738 */ 1739 if (error == EEXIST) 1740 error = 0; 1741 return (error); 1742 } 1743 1744 /* 1745 * nfs make dir call 1746 */ 1747 int 1748 nfs_mkdir(ap) 1749 struct vop_mkdir_args /* { 1750 struct vnode *a_dvp; 1751 struct vnode **a_vpp; 1752 struct componentname *a_cnp; 1753 struct vattr *a_vap; 1754 } */ *ap; 1755 { 1756 register struct vnode *dvp = ap->a_dvp; 1757 register struct vattr *vap = ap->a_vap; 1758 register struct componentname *cnp = ap->a_cnp; 1759 register struct nfsv2_sattr *sp; 1760 register struct nfsv3_sattr *sp3; 1761 register u_long *tl; 1762 register caddr_t cp; 1763 register long t1, t2; 1764 register int len; 1765 struct nfsnode *np = (struct nfsnode *)0; 1766 struct vnode *newvp = (struct vnode *)0; 1767 caddr_t bpos, dpos, cp2; 1768 nfsfh_t *fhp; 1769 int error = 0, wccflag = NFSV3_WCCRATTR, attrflag; 1770 int fhsize, gotvp = 0; 1771 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 1772 struct vattr vattr; 1773 int v3 = NFS_ISV3(dvp); 1774 1775 if (error = VOP_GETATTR(dvp, &vattr, cnp->cn_cred, cnp->cn_proc)) { 1776 VOP_ABORTOP(dvp, cnp); 1777 vput(dvp); 1778 return (error); 1779 } 1780 len = cnp->cn_namelen; 1781 nfsstats.rpccnt[NFSPROC_MKDIR]++; 1782 nfsm_reqhead(dvp, NFSPROC_MKDIR, 1783 NFSX_FH(v3) + NFSX_UNSIGNED + nfsm_rndup(len) + NFSX_SATTR(v3)); 1784 nfsm_fhtom(dvp, v3); 1785 nfsm_strtom(cnp->cn_nameptr, len, NFS_MAXNAMLEN); 1786 if (v3) { 1787 nfsm_build(sp3, struct nfsv3_sattr *, NFSX_V3SRVSATTR); 1788 nfsm_v3sattr(sp3, vap, cnp->cn_cred->cr_uid, vattr.va_gid); 1789 } else { 1790 nfsm_build(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 1791 sp->sa_mode = vtonfsv2_mode(VDIR, vap->va_mode); 1792 sp->sa_uid = txdr_unsigned(cnp->cn_cred->cr_uid); 1793 sp->sa_gid = txdr_unsigned(vattr.va_gid); 1794 sp->sa_size = -1; 1795 txdr_nfsv2time(&vap->va_atime, &sp->sa_atime); 1796 txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime); 1797 } 1798 nfsm_request(dvp, NFSPROC_MKDIR, cnp->cn_proc, cnp->cn_cred); 1799 if (!error) 1800 nfsm_mtofh(dvp, newvp, v3, gotvp); 1801 if (v3) 1802 nfsm_wcc_data(dvp, wccflag); 1803 nfsm_reqdone; 1804 VTONFS(dvp)->n_flag |= NMODIFIED; 1805 if (!wccflag) 1806 VTONFS(dvp)->n_attrstamp = 0; 1807 /* 1808 * Kludge: Map EEXIST => 0 assuming that you have a reply to a retry 1809 * if we can succeed in looking up the directory. 1810 */ 1811 if (error == EEXIST || (!error && !gotvp)) { 1812 if (newvp) { 1813 vrele(newvp); 1814 newvp = (struct vnode *)0; 1815 } 1816 error = nfs_lookitup(dvp, cnp->cn_nameptr, len, cnp->cn_cred, 1817 cnp->cn_proc, &np); 1818 if (!error) { 1819 newvp = NFSTOV(np); 1820 if (newvp->v_type != VDIR) 1821 error = EEXIST; 1822 } 1823 } 1824 if (error) { 1825 if (newvp) 1826 vrele(newvp); 1827 } else 1828 *ap->a_vpp = newvp; 1829 FREE(cnp->cn_pnbuf, M_NAMEI); 1830 vrele(dvp); 1831 return (error); 1832 } 1833 1834 /* 1835 * nfs remove directory call 1836 */ 1837 int 1838 nfs_rmdir(ap) 1839 struct vop_rmdir_args /* { 1840 struct vnode *a_dvp; 1841 struct vnode *a_vp; 1842 struct componentname *a_cnp; 1843 } */ *ap; 1844 { 1845 register struct vnode *vp = ap->a_vp; 1846 register struct vnode *dvp = ap->a_dvp; 1847 register struct componentname *cnp = ap->a_cnp; 1848 register u_long *tl; 1849 register caddr_t cp; 1850 register long t1, t2; 1851 caddr_t bpos, dpos, cp2; 1852 int error = 0, wccflag = NFSV3_WCCRATTR; 1853 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 1854 int v3 = NFS_ISV3(dvp); 1855 1856 if (dvp == vp) { 1857 vrele(dvp); 1858 vrele(dvp); 1859 FREE(cnp->cn_pnbuf, M_NAMEI); 1860 return (EINVAL); 1861 } 1862 nfsstats.rpccnt[NFSPROC_RMDIR]++; 1863 nfsm_reqhead(dvp, NFSPROC_RMDIR, 1864 NFSX_FH(v3) + NFSX_UNSIGNED + nfsm_rndup(cnp->cn_namelen)); 1865 nfsm_fhtom(dvp, v3); 1866 nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN); 1867 nfsm_request(dvp, NFSPROC_RMDIR, cnp->cn_proc, cnp->cn_cred); 1868 if (v3) 1869 nfsm_wcc_data(dvp, wccflag); 1870 nfsm_reqdone; 1871 FREE(cnp->cn_pnbuf, M_NAMEI); 1872 VTONFS(dvp)->n_flag |= NMODIFIED; 1873 if (!wccflag) 1874 VTONFS(dvp)->n_attrstamp = 0; 1875 cache_purge(dvp); 1876 cache_purge(vp); 1877 vrele(vp); 1878 vrele(dvp); 1879 /* 1880 * Kludge: Map ENOENT => 0 assuming that you have a reply to a retry. 1881 */ 1882 if (error == ENOENT) 1883 error = 0; 1884 return (error); 1885 } 1886 1887 /* 1888 * nfs readdir call 1889 */ 1890 int 1891 nfs_readdir(ap) 1892 struct vop_readdir_args /* { 1893 struct vnode *a_vp; 1894 struct uio *a_uio; 1895 struct ucred *a_cred; 1896 } */ *ap; 1897 { 1898 register struct vnode *vp = ap->a_vp; 1899 register struct nfsnode *np = VTONFS(vp); 1900 register struct uio *uio = ap->a_uio; 1901 int tresid, error; 1902 struct vattr vattr; 1903 1904 if (vp->v_type != VDIR) 1905 return (EPERM); 1906 /* 1907 * First, check for hit on the EOF offset cache 1908 */ 1909 if (np->n_direofoffset > 0 && uio->uio_offset >= np->n_direofoffset && 1910 (np->n_flag & NMODIFIED) == 0) { 1911 if (VFSTONFS(vp->v_mount)->nm_flag & NFSMNT_NQNFS) { 1912 if (NQNFS_CKCACHABLE(vp, ND_READ)) { 1913 nfsstats.direofcache_hits++; 1914 return (0); 1915 } 1916 } else if (VOP_GETATTR(vp, &vattr, ap->a_cred, uio->uio_procp) == 0 && 1917 np->n_mtime == vattr.va_mtime.ts_sec) { 1918 nfsstats.direofcache_hits++; 1919 return (0); 1920 } 1921 } 1922 1923 /* 1924 * Call nfs_bioread() to do the real work. 1925 */ 1926 tresid = uio->uio_resid; 1927 error = nfs_bioread(vp, uio, 0, ap->a_cred); 1928 1929 if (!error && uio->uio_resid == tresid) 1930 nfsstats.direofcache_misses++; 1931 return (error); 1932 } 1933 1934 /* 1935 * Readdir rpc call. 1936 * Called from below the buffer cache by nfs_doio(). 1937 */ 1938 int 1939 nfs_readdirrpc(vp, uiop, cred) 1940 struct vnode *vp; 1941 register struct uio *uiop; 1942 struct ucred *cred; 1943 { 1944 register int len, left; 1945 register struct dirent *dp; 1946 register u_long *tl; 1947 register caddr_t cp; 1948 register long t1, t2; 1949 register nfsuint64 *cookiep; 1950 caddr_t bpos, dpos, cp2; 1951 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 1952 nfsuint64 cookie; 1953 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 1954 struct nfsnode *dnp = VTONFS(vp); 1955 nfsfh_t *fhp; 1956 u_quad_t frev, fileno; 1957 int error = 0, tlen, more_dirs = 1, blksiz = 0, bigenough = 1, i; 1958 int cachable, attrflag, fhsize; 1959 int v3 = NFS_ISV3(vp); 1960 1961 #ifndef nolint 1962 dp = (struct dirent *)0; 1963 #endif 1964 #ifndef DIAGNOSTIC 1965 if (uiop->uio_iovcnt != 1 || (uiop->uio_offset & (NFS_DIRBLKSIZ - 1)) || 1966 (uiop->uio_resid & (NFS_DIRBLKSIZ - 1))) 1967 panic("nfs readdirrpc bad uio"); 1968 #endif 1969 1970 /* 1971 * If there is no cookie, assume end of directory. 1972 */ 1973 cookiep = nfs_getcookie(dnp, uiop->uio_offset, 0); 1974 if (cookiep) 1975 cookie = *cookiep; 1976 else 1977 return (0); 1978 /* 1979 * Loop around doing readdir rpc's of size nm_readdirsize 1980 * truncated to a multiple of DIRBLKSIZ. 1981 * The stopping criteria is EOF or buffer full. 1982 */ 1983 while (more_dirs && bigenough) { 1984 nfsstats.rpccnt[NFSPROC_READDIR]++; 1985 nfsm_reqhead(vp, NFSPROC_READDIR, NFSX_FH(v3) + 1986 NFSX_READDIR(v3)); 1987 nfsm_fhtom(vp, v3); 1988 if (v3) { 1989 nfsm_build(tl, u_long *, 5 * NFSX_UNSIGNED); 1990 *tl++ = cookie.nfsuquad[0]; 1991 *tl++ = cookie.nfsuquad[1]; 1992 *tl++ = dnp->n_cookieverf.nfsuquad[0]; 1993 *tl++ = dnp->n_cookieverf.nfsuquad[1]; 1994 } else { 1995 nfsm_build(tl, u_long *, 2 * NFSX_UNSIGNED); 1996 *tl++ = cookie.nfsuquad[0]; 1997 } 1998 *tl = txdr_unsigned(nmp->nm_readdirsize); 1999 nfsm_request(vp, NFSPROC_READDIR, uiop->uio_procp, cred); 2000 if (v3) { 2001 nfsm_postop_attr(vp, attrflag); 2002 if (!error) { 2003 nfsm_dissect(tl, u_long *, 2 * NFSX_UNSIGNED); 2004 dnp->n_cookieverf.nfsuquad[0] = *tl++; 2005 dnp->n_cookieverf.nfsuquad[1] = *tl; 2006 } else { 2007 m_freem(mrep); 2008 goto nfsmout; 2009 } 2010 } 2011 nfsm_dissect(tl, u_long *, NFSX_UNSIGNED); 2012 more_dirs = fxdr_unsigned(int, *tl); 2013 2014 /* loop thru the dir entries, doctoring them to 4bsd form */ 2015 while (more_dirs && bigenough) { 2016 if (v3) { 2017 nfsm_dissect(tl, u_long *, 3 * NFSX_UNSIGNED); 2018 fxdr_hyper(tl, &fileno); 2019 len = fxdr_unsigned(int, *(tl + 2)); 2020 } else { 2021 nfsm_dissect(tl, u_long *, 2 * NFSX_UNSIGNED); 2022 fileno = fxdr_unsigned(u_quad_t, *tl++); 2023 len = fxdr_unsigned(int, *tl); 2024 } 2025 if (len <= 0 || len > NFS_MAXNAMLEN) { 2026 error = EBADRPC; 2027 m_freem(mrep); 2028 goto nfsmout; 2029 } 2030 tlen = nfsm_rndup(len); 2031 if (tlen == len) 2032 tlen += 4; /* To ensure null termination */ 2033 left = DIRBLKSIZ - blksiz; 2034 if ((tlen + DIRHDSIZ) > left) { 2035 dp->d_reclen += left; 2036 uiop->uio_iov->iov_base += left; 2037 uiop->uio_iov->iov_len -= left; 2038 uiop->uio_offset += left; 2039 uiop->uio_resid -= left; 2040 blksiz = 0; 2041 } 2042 if ((tlen + DIRHDSIZ) > uiop->uio_resid) 2043 bigenough = 0; 2044 if (bigenough) { 2045 dp = (struct dirent *)uiop->uio_iov->iov_base; 2046 dp->d_fileno = (int)fileno; 2047 dp->d_namlen = len; 2048 dp->d_reclen = tlen + DIRHDSIZ; 2049 dp->d_type = DT_UNKNOWN; 2050 blksiz += dp->d_reclen; 2051 if (blksiz == DIRBLKSIZ) 2052 blksiz = 0; 2053 uiop->uio_offset += DIRHDSIZ; 2054 uiop->uio_resid -= DIRHDSIZ; 2055 uiop->uio_iov->iov_base += DIRHDSIZ; 2056 uiop->uio_iov->iov_len -= DIRHDSIZ; 2057 nfsm_mtouio(uiop, len); 2058 cp = uiop->uio_iov->iov_base; 2059 tlen -= len; 2060 *cp = '\0'; /* null terminate */ 2061 uiop->uio_iov->iov_base += tlen; 2062 uiop->uio_iov->iov_len -= tlen; 2063 uiop->uio_offset += tlen; 2064 uiop->uio_resid -= tlen; 2065 } else 2066 nfsm_adv(nfsm_rndup(len)); 2067 if (v3) { 2068 nfsm_dissect(tl, u_long *, 3 * NFSX_UNSIGNED); 2069 } else { 2070 nfsm_dissect(tl, u_long *, 2 * NFSX_UNSIGNED); 2071 } 2072 if (bigenough) { 2073 cookie.nfsuquad[0] = *tl++; 2074 if (v3) 2075 cookie.nfsuquad[1] = *tl++; 2076 } else if (v3) 2077 tl += 2; 2078 else 2079 tl++; 2080 more_dirs = fxdr_unsigned(int, *tl); 2081 } 2082 /* 2083 * If at end of rpc data, get the eof boolean 2084 */ 2085 if (!more_dirs) { 2086 nfsm_dissect(tl, u_long *, NFSX_UNSIGNED); 2087 more_dirs = (fxdr_unsigned(int, *tl) == 0); 2088 } 2089 m_freem(mrep); 2090 } 2091 /* 2092 * Fill last record, iff any, out to a multiple of DIRBLKSIZ 2093 * by increasing d_reclen for the last record. 2094 */ 2095 if (blksiz > 0) { 2096 left = DIRBLKSIZ - blksiz; 2097 dp->d_reclen += left; 2098 uiop->uio_iov->iov_base += left; 2099 uiop->uio_iov->iov_len -= left; 2100 uiop->uio_offset += left; 2101 uiop->uio_resid -= left; 2102 } 2103 2104 /* 2105 * We are now either at the end of the directory or have filled the 2106 * block. 2107 */ 2108 if (bigenough) 2109 dnp->n_direofoffset = uiop->uio_offset; 2110 else { 2111 if (uiop->uio_resid > 0) 2112 printf("EEK! readdirrpc resid > 0\n"); 2113 cookiep = nfs_getcookie(dnp, uiop->uio_offset, 1); 2114 *cookiep = cookie; 2115 } 2116 nfsmout: 2117 return (error); 2118 } 2119 2120 /* 2121 * NFS V3 readdir plus RPC. Used in place of nfs_readdirrpc(). 2122 */ 2123 int 2124 nfs_readdirplusrpc(vp, uiop, cred) 2125 struct vnode *vp; 2126 register struct uio *uiop; 2127 struct ucred *cred; 2128 { 2129 register int len, left; 2130 register struct dirent *dp; 2131 register u_long *tl; 2132 register caddr_t cp; 2133 register long t1, t2; 2134 register struct vnode *newvp; 2135 register nfsuint64 *cookiep; 2136 caddr_t bpos, dpos, cp2, dpossav1, dpossav2; 2137 struct mbuf *mreq, *mrep, *md, *mb, *mb2, *mdsav1, *mdsav2; 2138 struct nameidata nami, *ndp = &nami; 2139 struct componentname *cnp = &ndp->ni_cnd; 2140 nfsuint64 cookie; 2141 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 2142 struct nfsnode *dnp = VTONFS(vp), *np; 2143 nfsfh_t *fhp; 2144 u_quad_t frev, fileno; 2145 int error = 0, tlen, more_dirs = 1, blksiz = 0, doit, bigenough = 1, i; 2146 int cachable, attrflag, fhsize; 2147 2148 #ifndef nolint 2149 dp = (struct dirent *)0; 2150 #endif 2151 #ifndef DIAGNOSTIC 2152 if (uiop->uio_iovcnt != 1 || (uiop->uio_offset & (DIRBLKSIZ - 1)) || 2153 (uiop->uio_resid & (DIRBLKSIZ - 1))) 2154 panic("nfs readdirplusrpc bad uio"); 2155 #endif 2156 ndp->ni_dvp = vp; 2157 newvp = NULLVP; 2158 2159 /* 2160 * If there is no cookie, assume end of directory. 2161 */ 2162 cookiep = nfs_getcookie(dnp, uiop->uio_offset, 0); 2163 if (cookiep) 2164 cookie = *cookiep; 2165 else 2166 return (0); 2167 /* 2168 * Loop around doing readdir rpc's of size nm_readdirsize 2169 * truncated to a multiple of DIRBLKSIZ. 2170 * The stopping criteria is EOF or buffer full. 2171 */ 2172 while (more_dirs && bigenough) { 2173 nfsstats.rpccnt[NFSPROC_READDIRPLUS]++; 2174 nfsm_reqhead(vp, NFSPROC_READDIRPLUS, 2175 NFSX_FH(1) + 6 * NFSX_UNSIGNED); 2176 nfsm_fhtom(vp, 1); 2177 nfsm_build(tl, u_long *, 6 * NFSX_UNSIGNED); 2178 *tl++ = cookie.nfsuquad[0]; 2179 *tl++ = cookie.nfsuquad[1]; 2180 *tl++ = dnp->n_cookieverf.nfsuquad[0]; 2181 *tl++ = dnp->n_cookieverf.nfsuquad[1]; 2182 *tl++ = txdr_unsigned(nmp->nm_readdirsize); 2183 *tl = txdr_unsigned(nmp->nm_rsize); 2184 nfsm_request(vp, NFSPROC_READDIRPLUS, uiop->uio_procp, cred); 2185 nfsm_postop_attr(vp, attrflag); 2186 if (error) { 2187 m_freem(mrep); 2188 goto nfsmout; 2189 } 2190 nfsm_dissect(tl, u_long *, 3 * NFSX_UNSIGNED); 2191 dnp->n_cookieverf.nfsuquad[0] = *tl++; 2192 dnp->n_cookieverf.nfsuquad[1] = *tl++; 2193 more_dirs = fxdr_unsigned(int, *tl); 2194 2195 /* loop thru the dir entries, doctoring them to 4bsd form */ 2196 while (more_dirs && bigenough) { 2197 nfsm_dissect(tl, u_long *, 3 * NFSX_UNSIGNED); 2198 fxdr_hyper(tl, &fileno); 2199 len = fxdr_unsigned(int, *(tl + 2)); 2200 if (len <= 0 || len > NFS_MAXNAMLEN) { 2201 error = EBADRPC; 2202 m_freem(mrep); 2203 goto nfsmout; 2204 } 2205 tlen = nfsm_rndup(len); 2206 if (tlen == len) 2207 tlen += 4; /* To ensure null termination*/ 2208 left = DIRBLKSIZ - blksiz; 2209 if ((tlen + DIRHDSIZ) > left) { 2210 dp->d_reclen += left; 2211 uiop->uio_iov->iov_base += left; 2212 uiop->uio_iov->iov_len -= left; 2213 uiop->uio_offset += left; 2214 uiop->uio_resid -= left; 2215 blksiz = 0; 2216 } 2217 if ((tlen + DIRHDSIZ) > uiop->uio_resid) 2218 bigenough = 0; 2219 if (bigenough) { 2220 dp = (struct dirent *)uiop->uio_iov->iov_base; 2221 dp->d_fileno = (int)fileno; 2222 dp->d_namlen = len; 2223 dp->d_reclen = tlen + DIRHDSIZ; 2224 dp->d_type = DT_UNKNOWN; 2225 blksiz += dp->d_reclen; 2226 if (blksiz == DIRBLKSIZ) 2227 blksiz = 0; 2228 uiop->uio_offset += DIRHDSIZ; 2229 uiop->uio_resid -= DIRHDSIZ; 2230 uiop->uio_iov->iov_base += DIRHDSIZ; 2231 uiop->uio_iov->iov_len -= DIRHDSIZ; 2232 cnp->cn_nameptr = uiop->uio_iov->iov_base; 2233 cnp->cn_namelen = len; 2234 nfsm_mtouio(uiop, len); 2235 cp = uiop->uio_iov->iov_base; 2236 tlen -= len; 2237 *cp = '\0'; 2238 uiop->uio_iov->iov_base += tlen; 2239 uiop->uio_iov->iov_len -= tlen; 2240 uiop->uio_offset += tlen; 2241 uiop->uio_resid -= tlen; 2242 } else 2243 nfsm_adv(nfsm_rndup(len)); 2244 nfsm_dissect(tl, u_long *, 3 * NFSX_UNSIGNED); 2245 if (bigenough) { 2246 cookie.nfsuquad[0] = *tl++; 2247 cookie.nfsuquad[1] = *tl++; 2248 } else 2249 tl += 2; 2250 2251 /* 2252 * Since the attributes are before the file handle 2253 * (sigh), we must skip over the attributes and then 2254 * come back and get them. 2255 */ 2256 attrflag = fxdr_unsigned(int, *tl); 2257 if (attrflag) { 2258 dpossav1 = dpos; 2259 mdsav1 = md; 2260 nfsm_adv(NFSX_V3FATTR); 2261 nfsm_dissect(tl, u_long *, NFSX_UNSIGNED); 2262 doit = fxdr_unsigned(int, *tl); 2263 if (doit) { 2264 nfsm_getfh(fhp, fhsize, 1); 2265 if (NFS_CMPFH(dnp, fhp, fhsize)) { 2266 VREF(vp); 2267 newvp = vp; 2268 np = dnp; 2269 } else { 2270 if (error = nfs_nget(vp->v_mount, fhp, 2271 fhsize, &np)) 2272 doit = 0; 2273 else 2274 newvp = NFSTOV(np); 2275 } 2276 } 2277 if (doit) { 2278 dpossav2 = dpos; 2279 dpos = dpossav1; 2280 mdsav2 = md; 2281 md = mdsav1; 2282 nfsm_loadattr(newvp, (struct vattr *)0); 2283 dpos = dpossav2; 2284 md = mdsav2; 2285 dp->d_type = 2286 IFTODT(VTTOIF(np->n_vattr.va_type)); 2287 ndp->ni_vp = newvp; 2288 cnp->cn_hash = 0; 2289 for (cp = cnp->cn_nameptr, i = 1; i <= len; 2290 i++, cp++) 2291 cnp->cn_hash += (unsigned char)*cp * i; 2292 if (cnp->cn_namelen <= NCHNAMLEN) 2293 cache_enter(ndp->ni_dvp, ndp->ni_vp, cnp); 2294 } 2295 } else { 2296 /* Just skip over the file handle */ 2297 nfsm_dissect(tl, u_long *, NFSX_UNSIGNED); 2298 i = fxdr_unsigned(int, *tl); 2299 nfsm_adv(nfsm_rndup(i)); 2300 } 2301 if (newvp != NULLVP) { 2302 vrele(newvp); 2303 newvp = NULLVP; 2304 } 2305 nfsm_dissect(tl, u_long *, NFSX_UNSIGNED); 2306 more_dirs = fxdr_unsigned(int, *tl); 2307 } 2308 /* 2309 * If at end of rpc data, get the eof boolean 2310 */ 2311 if (!more_dirs) { 2312 nfsm_dissect(tl, u_long *, NFSX_UNSIGNED); 2313 more_dirs = (fxdr_unsigned(int, *tl) == 0); 2314 } 2315 m_freem(mrep); 2316 } 2317 /* 2318 * Fill last record, iff any, out to a multiple of NFS_DIRBLKSIZ 2319 * by increasing d_reclen for the last record. 2320 */ 2321 if (blksiz > 0) { 2322 left = DIRBLKSIZ - blksiz; 2323 dp->d_reclen += left; 2324 uiop->uio_iov->iov_base += left; 2325 uiop->uio_iov->iov_len -= left; 2326 uiop->uio_offset += left; 2327 uiop->uio_resid -= left; 2328 } 2329 2330 /* 2331 * We are now either at the end of the directory or have filled the 2332 * block. 2333 */ 2334 if (bigenough) 2335 dnp->n_direofoffset = uiop->uio_offset; 2336 else { 2337 if (uiop->uio_resid > 0) 2338 printf("EEK! readdirplusrpc resid > 0\n"); 2339 cookiep = nfs_getcookie(dnp, uiop->uio_offset, 1); 2340 *cookiep = cookie; 2341 } 2342 nfsmout: 2343 if (newvp != NULLVP) 2344 vrele(newvp); 2345 return (error); 2346 } 2347 static char hextoasc[] = "0123456789abcdef"; 2348 2349 /* 2350 * Silly rename. To make the NFS filesystem that is stateless look a little 2351 * more like the "ufs" a remove of an active vnode is translated to a rename 2352 * to a funny looking filename that is removed by nfs_inactive on the 2353 * nfsnode. There is the potential for another process on a different client 2354 * to create the same funny name between the nfs_lookitup() fails and the 2355 * nfs_rename() completes, but... 2356 */ 2357 int 2358 nfs_sillyrename(dvp, vp, cnp) 2359 struct vnode *dvp, *vp; 2360 struct componentname *cnp; 2361 { 2362 register struct sillyrename *sp; 2363 struct nfsnode *np; 2364 int error; 2365 short pid; 2366 2367 cache_purge(dvp); 2368 np = VTONFS(vp); 2369 #ifndef DIAGNOSTIC 2370 if (vp->v_type == VDIR) 2371 panic("nfs: sillyrename dir"); 2372 #endif 2373 MALLOC(sp, struct sillyrename *, sizeof (struct sillyrename), 2374 M_NFSREQ, M_WAITOK); 2375 sp->s_cred = crdup(cnp->cn_cred); 2376 sp->s_dvp = dvp; 2377 VREF(dvp); 2378 2379 /* Fudge together a funny name */ 2380 pid = cnp->cn_proc->p_pid; 2381 bcopy(".nfsAxxxx4.4", sp->s_name, 13); 2382 sp->s_namlen = 12; 2383 sp->s_name[8] = hextoasc[pid & 0xf]; 2384 sp->s_name[7] = hextoasc[(pid >> 4) & 0xf]; 2385 sp->s_name[6] = hextoasc[(pid >> 8) & 0xf]; 2386 sp->s_name[5] = hextoasc[(pid >> 12) & 0xf]; 2387 2388 /* Try lookitups until we get one that isn't there */ 2389 while (nfs_lookitup(dvp, sp->s_name, sp->s_namlen, sp->s_cred, 2390 cnp->cn_proc, (struct nfsnode **)0) == 0) { 2391 sp->s_name[4]++; 2392 if (sp->s_name[4] > 'z') { 2393 error = EINVAL; 2394 goto bad; 2395 } 2396 } 2397 if (error = nfs_renameit(dvp, cnp, sp)) 2398 goto bad; 2399 error = nfs_lookitup(dvp, sp->s_name, sp->s_namlen, sp->s_cred, 2400 cnp->cn_proc, &np); 2401 np->n_sillyrename = sp; 2402 return (0); 2403 bad: 2404 vrele(sp->s_dvp); 2405 crfree(sp->s_cred); 2406 free((caddr_t)sp, M_NFSREQ); 2407 return (error); 2408 } 2409 2410 /* 2411 * Look up a file name and optionally either update the file handle or 2412 * allocate an nfsnode, depending on the value of npp. 2413 * npp == NULL --> just do the lookup 2414 * *npp == NULL --> allocate a new nfsnode and make sure attributes are 2415 * handled too 2416 * *npp != NULL --> update the file handle in the vnode 2417 */ 2418 int 2419 nfs_lookitup(dvp, name, len, cred, procp, npp) 2420 register struct vnode *dvp; 2421 char *name; 2422 int len; 2423 struct ucred *cred; 2424 struct proc *procp; 2425 struct nfsnode **npp; 2426 { 2427 register u_long *tl; 2428 register caddr_t cp; 2429 register long t1, t2; 2430 struct vnode *newvp = (struct vnode *)0; 2431 struct nfsnode *np, *dnp = VTONFS(dvp); 2432 caddr_t bpos, dpos, cp2; 2433 int error = 0, fhlen, attrflag; 2434 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 2435 nfsfh_t *nfhp; 2436 int v3 = NFS_ISV3(dvp); 2437 2438 nfsstats.rpccnt[NFSPROC_LOOKUP]++; 2439 nfsm_reqhead(dvp, NFSPROC_LOOKUP, 2440 NFSX_FH(v3) + NFSX_UNSIGNED + nfsm_rndup(len)); 2441 nfsm_fhtom(dvp, v3); 2442 nfsm_strtom(name, len, NFS_MAXNAMLEN); 2443 nfsm_request(dvp, NFSPROC_LOOKUP, procp, cred); 2444 if (npp && !error) { 2445 nfsm_getfh(nfhp, fhlen, v3); 2446 if (*npp) { 2447 np = *npp; 2448 if (np->n_fhsize > NFS_SMALLFH && fhlen <= NFS_SMALLFH) { 2449 free((caddr_t)np->n_fhp, M_NFSBIGFH); 2450 np->n_fhp = &np->n_fh; 2451 } else if (np->n_fhsize <= NFS_SMALLFH && fhlen>NFS_SMALLFH) 2452 np->n_fhp =(nfsfh_t *)malloc(fhlen,M_NFSBIGFH,M_WAITOK); 2453 bcopy((caddr_t)nfhp, (caddr_t)np->n_fhp, fhlen); 2454 np->n_fhsize = fhlen; 2455 newvp = NFSTOV(np); 2456 } else if (NFS_CMPFH(dnp, nfhp, fhlen)) { 2457 VREF(dvp); 2458 newvp = dvp; 2459 } else { 2460 error = nfs_nget(dvp->v_mount, nfhp, fhlen, &np); 2461 if (error) { 2462 m_freem(mrep); 2463 return (error); 2464 } 2465 newvp = NFSTOV(np); 2466 } 2467 if (v3) { 2468 nfsm_postop_attr(newvp, attrflag); 2469 if (!attrflag && *npp == NULL) { 2470 m_freem(mrep); 2471 vrele(newvp); 2472 return (ENOENT); 2473 } 2474 } else 2475 nfsm_loadattr(newvp, (struct vattr *)0); 2476 } 2477 nfsm_reqdone; 2478 if (npp && *npp == NULL) { 2479 if (error) { 2480 if (newvp) 2481 vrele(newvp); 2482 } else 2483 *npp = np; 2484 } 2485 return (error); 2486 } 2487 2488 /* 2489 * Nfs Version 3 commit rpc 2490 */ 2491 int 2492 nfs_commit(vp, offset, cnt, cred, procp) 2493 register struct vnode *vp; 2494 u_quad_t offset; 2495 int cnt; 2496 struct ucred *cred; 2497 struct proc *procp; 2498 { 2499 register caddr_t cp; 2500 register u_long *tl; 2501 register int t1, t2; 2502 register struct nfsmount *nmp = VFSTONFS(vp->v_mount); 2503 caddr_t bpos, dpos, cp2; 2504 int error = 0, wccflag = NFSV3_WCCRATTR; 2505 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 2506 2507 if ((nmp->nm_flag & NFSMNT_HASWRITEVERF) == 0) 2508 return (0); 2509 nfsstats.rpccnt[NFSPROC_COMMIT]++; 2510 nfsm_reqhead(vp, NFSPROC_COMMIT, NFSX_FH(1)); 2511 nfsm_fhtom(vp, 1); 2512 nfsm_build(tl, u_long *, 3 * NFSX_UNSIGNED); 2513 txdr_hyper(&offset, tl); 2514 tl += 2; 2515 *tl = txdr_unsigned(cnt); 2516 nfsm_request(vp, NFSPROC_COMMIT, procp, cred); 2517 nfsm_wcc_data(vp, wccflag); 2518 if (!error) { 2519 nfsm_dissect(tl, u_long *, NFSX_V3WRITEVERF); 2520 if (bcmp((caddr_t)nmp->nm_verf, (caddr_t)tl, 2521 NFSX_V3WRITEVERF)) { 2522 bcopy((caddr_t)tl, (caddr_t)nmp->nm_verf, 2523 NFSX_V3WRITEVERF); 2524 error = NFSERR_STALEWRITEVERF; 2525 } 2526 } 2527 nfsm_reqdone; 2528 return (error); 2529 } 2530 2531 /* 2532 * Kludge City.. 2533 * - make nfs_bmap() essentially a no-op that does no translation 2534 * - do nfs_strategy() by doing I/O with nfs_readrpc/nfs_writerpc 2535 * (Maybe I could use the process's page mapping, but I was concerned that 2536 * Kernel Write might not be enabled and also figured copyout() would do 2537 * a lot more work than bcopy() and also it currently happens in the 2538 * context of the swapper process (2). 2539 */ 2540 int 2541 nfs_bmap(ap) 2542 struct vop_bmap_args /* { 2543 struct vnode *a_vp; 2544 daddr_t a_bn; 2545 struct vnode **a_vpp; 2546 daddr_t *a_bnp; 2547 int *a_runp; 2548 } */ *ap; 2549 { 2550 register struct vnode *vp = ap->a_vp; 2551 2552 if (ap->a_vpp != NULL) 2553 *ap->a_vpp = vp; 2554 if (ap->a_bnp != NULL) 2555 *ap->a_bnp = ap->a_bn * btodb(vp->v_mount->mnt_stat.f_iosize); 2556 return (0); 2557 } 2558 2559 /* 2560 * Strategy routine. 2561 * For async requests when nfsiod(s) are running, queue the request by 2562 * calling nfs_asyncio(), otherwise just all nfs_doio() to do the 2563 * request. 2564 */ 2565 int 2566 nfs_strategy(ap) 2567 struct vop_strategy_args *ap; 2568 { 2569 register struct buf *bp = ap->a_bp; 2570 struct ucred *cr; 2571 struct proc *p; 2572 int error = 0; 2573 2574 if (bp->b_flags & B_PHYS) 2575 panic("nfs physio"); 2576 if (bp->b_flags & B_ASYNC) 2577 p = (struct proc *)0; 2578 else 2579 p = curproc; /* XXX */ 2580 if (bp->b_flags & B_READ) 2581 cr = bp->b_rcred; 2582 else 2583 cr = bp->b_wcred; 2584 /* 2585 * If the op is asynchronous and an i/o daemon is waiting 2586 * queue the request, wake it up and wait for completion 2587 * otherwise just do it ourselves. 2588 */ 2589 if ((bp->b_flags & B_ASYNC) == 0 || 2590 nfs_asyncio(bp, NOCRED)) 2591 error = nfs_doio(bp, cr, p); 2592 return (error); 2593 } 2594 2595 /* 2596 * Mmap a file 2597 * 2598 * NB Currently unsupported. 2599 */ 2600 /* ARGSUSED */ 2601 int 2602 nfs_mmap(ap) 2603 struct vop_mmap_args /* { 2604 struct vnode *a_vp; 2605 int a_fflags; 2606 struct ucred *a_cred; 2607 struct proc *a_p; 2608 } */ *ap; 2609 { 2610 2611 return (EINVAL); 2612 } 2613 2614 /* 2615 * fsync vnode op. Just call nfs_flush() with commit == 1. 2616 */ 2617 /* ARGSUSED */ 2618 int 2619 nfs_fsync(ap) 2620 struct vop_fsync_args /* { 2621 struct vnodeop_desc *a_desc; 2622 struct vnode * a_vp; 2623 struct ucred * a_cred; 2624 int a_waitfor; 2625 struct proc * a_p; 2626 } */ *ap; 2627 { 2628 2629 return (nfs_flush(ap->a_vp, ap->a_cred, ap->a_waitfor, ap->a_p, 1)); 2630 } 2631 2632 /* 2633 * Flush all the blocks associated with a vnode. 2634 * Walk through the buffer pool and push any dirty pages 2635 * associated with the vnode. 2636 */ 2637 int 2638 nfs_flush(vp, cred, waitfor, p, commit) 2639 register struct vnode *vp; 2640 struct ucred *cred; 2641 int waitfor; 2642 struct proc *p; 2643 int commit; 2644 { 2645 register struct nfsnode *np = VTONFS(vp); 2646 register struct buf *bp; 2647 register int i; 2648 struct buf *nbp; 2649 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 2650 int s, error = 0, slptimeo = 0, slpflag = 0, retv, bvecpos; 2651 int passone = 1; 2652 u_quad_t off = (u_quad_t)-1, endoff = 0, toff; 2653 #ifndef NFS_COMMITBVECSIZ 2654 #define NFS_COMMITBVECSIZ 20 2655 #endif 2656 struct buf *bvec[NFS_COMMITBVECSIZ]; 2657 2658 if (nmp->nm_flag & NFSMNT_INT) 2659 slpflag = PCATCH; 2660 if (!commit) 2661 passone = 0; 2662 /* 2663 * A b_flags == (B_DELWRI | B_NEEDCOMMIT) block has been written to the 2664 * server, but nas not been committed to stable storage on the server 2665 * yet. On the first pass, the byte range is worked out and the commit 2666 * rpc is done. On the second pass, nfs_writebp() is called to do the 2667 * job. 2668 */ 2669 again: 2670 bvecpos = 0; 2671 if (NFS_ISV3(vp) && commit) { 2672 s = splbio(); 2673 for (bp = vp->v_dirtyblkhd.lh_first; bp; bp = nbp) { 2674 nbp = bp->b_vnbufs.le_next; 2675 if (bvecpos >= NFS_COMMITBVECSIZ) 2676 break; 2677 if ((bp->b_flags & (B_BUSY | B_DELWRI | B_NEEDCOMMIT)) 2678 != (B_DELWRI | B_NEEDCOMMIT)) 2679 continue; 2680 bremfree(bp); 2681 bp->b_flags |= (B_BUSY | B_WRITEINPROG); 2682 /* 2683 * A list of these buffers is kept so that the 2684 * second loop knows which buffers have actually 2685 * been committed. This is necessary, since there 2686 * may be a race between the commit rpc and new 2687 * uncommitted writes on the file. 2688 */ 2689 bvec[bvecpos++] = bp; 2690 toff = ((u_quad_t)bp->b_blkno) * DEV_BSIZE + 2691 bp->b_dirtyoff; 2692 if (toff < off) 2693 off = toff; 2694 toff += (u_quad_t)(bp->b_dirtyend - bp->b_dirtyoff); 2695 if (toff > endoff) 2696 endoff = toff; 2697 } 2698 splx(s); 2699 } 2700 if (bvecpos > 0) { 2701 /* 2702 * Commit data on the server, as required. 2703 */ 2704 retv = nfs_commit(vp, off, (int)(endoff - off), cred, p); 2705 if (retv == NFSERR_STALEWRITEVERF) 2706 nfs_clearcommit(vp->v_mount); 2707 /* 2708 * Now, either mark the blocks I/O done or mark the 2709 * blocks dirty, depending on whether the commit 2710 * succeeded. 2711 */ 2712 for (i = 0; i < bvecpos; i++) { 2713 bp = bvec[i]; 2714 bp->b_flags &= ~(B_NEEDCOMMIT | B_WRITEINPROG); 2715 if (retv) { 2716 brelse(bp); 2717 } else { 2718 vp->v_numoutput++; 2719 bp->b_flags |= B_ASYNC; 2720 bp->b_flags &= ~(B_READ|B_DONE|B_ERROR|B_DELWRI); 2721 bp->b_dirtyoff = bp->b_dirtyend = 0; 2722 reassignbuf(bp, vp); 2723 biodone(bp); 2724 } 2725 } 2726 } 2727 2728 /* 2729 * Start/do any write(s) that are required. 2730 */ 2731 loop: 2732 s = splbio(); 2733 for (bp = vp->v_dirtyblkhd.lh_first; bp; bp = nbp) { 2734 nbp = bp->b_vnbufs.le_next; 2735 if (bp->b_flags & B_BUSY) { 2736 if (waitfor != MNT_WAIT || passone) 2737 continue; 2738 bp->b_flags |= B_WANTED; 2739 error = tsleep((caddr_t)bp, slpflag | (PRIBIO + 1), 2740 "nfsfsync", slptimeo); 2741 splx(s); 2742 if (error) { 2743 if (nfs_sigintr(nmp, (struct nfsreq *)0, p)) 2744 return (EINTR); 2745 if (slpflag == PCATCH) { 2746 slpflag = 0; 2747 slptimeo = 2 * hz; 2748 } 2749 } 2750 goto loop; 2751 } 2752 if ((bp->b_flags & B_DELWRI) == 0) 2753 panic("nfs_fsync: not dirty"); 2754 if ((passone || !commit) && (bp->b_flags & B_NEEDCOMMIT)) 2755 continue; 2756 bremfree(bp); 2757 if (passone || !commit) 2758 bp->b_flags |= (B_BUSY|B_ASYNC); 2759 else 2760 bp->b_flags |= (B_BUSY|B_ASYNC|B_WRITEINPROG|B_NEEDCOMMIT); 2761 splx(s); 2762 VOP_BWRITE(bp); 2763 goto loop; 2764 } 2765 splx(s); 2766 if (passone) { 2767 passone = 0; 2768 goto again; 2769 } 2770 if (waitfor == MNT_WAIT) { 2771 while (vp->v_numoutput) { 2772 vp->v_flag |= VBWAIT; 2773 error = tsleep((caddr_t)&vp->v_numoutput, 2774 slpflag | (PRIBIO + 1), "nfsfsync", slptimeo); 2775 if (error) { 2776 if (nfs_sigintr(nmp, (struct nfsreq *)0, p)) 2777 return (EINTR); 2778 if (slpflag == PCATCH) { 2779 slpflag = 0; 2780 slptimeo = 2 * hz; 2781 } 2782 } 2783 } 2784 if (vp->v_dirtyblkhd.lh_first && commit) { 2785 #ifndef DIAGNOSTIC 2786 vprint("nfs_fsync: dirty", vp); 2787 #endif 2788 goto loop; 2789 } 2790 } 2791 if (np->n_flag & NWRITEERR) { 2792 error = np->n_error; 2793 np->n_flag &= ~NWRITEERR; 2794 } 2795 return (error); 2796 } 2797 2798 /* 2799 * Return POSIX pathconf information applicable to nfs. 2800 * 2801 * The NFS V2 protocol doesn't support this, so just return EINVAL 2802 * for V2. 2803 */ 2804 /* ARGSUSED */ 2805 int 2806 nfs_pathconf(ap) 2807 struct vop_pathconf_args /* { 2808 struct vnode *a_vp; 2809 int a_name; 2810 int *a_retval; 2811 } */ *ap; 2812 { 2813 2814 return (EINVAL); 2815 } 2816 2817 /* 2818 * NFS advisory byte-level locks. 2819 * Currently unsupported. 2820 */ 2821 int 2822 nfs_advlock(ap) 2823 struct vop_advlock_args /* { 2824 struct vnode *a_vp; 2825 caddr_t a_id; 2826 int a_op; 2827 struct flock *a_fl; 2828 int a_flags; 2829 } */ *ap; 2830 { 2831 2832 return (EOPNOTSUPP); 2833 } 2834 2835 /* 2836 * Print out the contents of an nfsnode. 2837 */ 2838 int 2839 nfs_print(ap) 2840 struct vop_print_args /* { 2841 struct vnode *a_vp; 2842 } */ *ap; 2843 { 2844 register struct vnode *vp = ap->a_vp; 2845 register struct nfsnode *np = VTONFS(vp); 2846 2847 printf("tag VT_NFS, fileid %ld fsid 0x%lx", 2848 np->n_vattr.va_fileid, np->n_vattr.va_fsid); 2849 if (vp->v_type == VFIFO) 2850 fifo_printinfo(vp); 2851 printf("\n"); 2852 return (0); 2853 } 2854 2855 /* 2856 * NFS directory offset lookup. 2857 * Currently unsupported. 2858 */ 2859 int 2860 nfs_blkatoff(ap) 2861 struct vop_blkatoff_args /* { 2862 struct vnode *a_vp; 2863 off_t a_offset; 2864 char **a_res; 2865 struct buf **a_bpp; 2866 } */ *ap; 2867 { 2868 2869 return (EOPNOTSUPP); 2870 } 2871 2872 /* 2873 * NFS flat namespace allocation. 2874 * Currently unsupported. 2875 */ 2876 int 2877 nfs_valloc(ap) 2878 struct vop_valloc_args /* { 2879 struct vnode *a_pvp; 2880 int a_mode; 2881 struct ucred *a_cred; 2882 struct vnode **a_vpp; 2883 } */ *ap; 2884 { 2885 2886 return (EOPNOTSUPP); 2887 } 2888 2889 /* 2890 * NFS flat namespace free. 2891 * Currently unsupported. 2892 */ 2893 int 2894 nfs_vfree(ap) 2895 struct vop_vfree_args /* { 2896 struct vnode *a_pvp; 2897 ino_t a_ino; 2898 int a_mode; 2899 } */ *ap; 2900 { 2901 2902 return (EOPNOTSUPP); 2903 } 2904 2905 /* 2906 * NFS file truncation. 2907 */ 2908 int 2909 nfs_truncate(ap) 2910 struct vop_truncate_args /* { 2911 struct vnode *a_vp; 2912 off_t a_length; 2913 int a_flags; 2914 struct ucred *a_cred; 2915 struct proc *a_p; 2916 } */ *ap; 2917 { 2918 2919 /* Use nfs_setattr */ 2920 printf("nfs_truncate: need to implement!!"); 2921 return (EOPNOTSUPP); 2922 } 2923 2924 /* 2925 * NFS update. 2926 */ 2927 int 2928 nfs_update(ap) 2929 struct vop_update_args /* { 2930 struct vnode *a_vp; 2931 struct timeval *a_ta; 2932 struct timeval *a_tm; 2933 int a_waitfor; 2934 } */ *ap; 2935 { 2936 2937 /* Use nfs_setattr */ 2938 printf("nfs_update: need to implement!!"); 2939 return (EOPNOTSUPP); 2940 } 2941 2942 /* 2943 * Just call nfs_writebp() with the force argument set to 1. 2944 */ 2945 int 2946 nfs_bwrite(ap) 2947 struct vop_bwrite_args /* { 2948 struct vnode *a_bp; 2949 } */ *ap; 2950 { 2951 2952 return (nfs_writebp(ap->a_bp, 1)); 2953 } 2954 2955 /* 2956 * This is a clone of vn_bwrite(), except that B_WRITEINPROG isn't set unless 2957 * the force flag is one and it also handles the B_NEEDCOMMIT flag. 2958 */ 2959 int 2960 nfs_writebp(bp, force) 2961 register struct buf *bp; 2962 int force; 2963 { 2964 register int oldflags = bp->b_flags, retv = 1; 2965 register struct proc *p = curproc; /* XXX */ 2966 off_t off; 2967 2968 if(!(bp->b_flags & B_BUSY)) 2969 panic("bwrite: buffer is not busy???"); 2970 2971 bp->b_flags &= ~(B_READ|B_DONE|B_ERROR|B_DELWRI); 2972 2973 if (oldflags & B_ASYNC) { 2974 if (oldflags & B_DELWRI) { 2975 reassignbuf(bp, bp->b_vp); 2976 } else if (p) { 2977 ++p->p_stats->p_ru.ru_oublock; 2978 } 2979 } 2980 bp->b_vp->v_numoutput++; 2981 2982 /* 2983 * If B_NEEDCOMMIT is set, a commit rpc may do the trick. If not 2984 * an actual write will have to be scheduled via. VOP_STRATEGY(). 2985 * If B_WRITEINPROG is already set, then push it with a write anyhow. 2986 */ 2987 if (oldflags & (B_NEEDCOMMIT | B_WRITEINPROG) == B_NEEDCOMMIT) { 2988 off = ((u_quad_t)bp->b_blkno) * DEV_BSIZE + bp->b_dirtyoff; 2989 bp->b_flags |= B_WRITEINPROG; 2990 retv = nfs_commit(bp->b_vp, off, bp->b_dirtyend-bp->b_dirtyoff, 2991 bp->b_wcred, bp->b_proc); 2992 bp->b_flags &= ~B_WRITEINPROG; 2993 if (!retv) { 2994 bp->b_dirtyoff = bp->b_dirtyend = 0; 2995 bp->b_flags &= ~B_NEEDCOMMIT; 2996 biodone(bp); 2997 } else if (retv == NFSERR_STALEWRITEVERF) 2998 nfs_clearcommit(bp->b_vp->v_mount); 2999 } 3000 if (retv) { 3001 if (force) 3002 bp->b_flags |= B_WRITEINPROG; 3003 VOP_STRATEGY(bp); 3004 } 3005 3006 if( (oldflags & B_ASYNC) == 0) { 3007 int rtval = biowait(bp); 3008 if (oldflags & B_DELWRI) { 3009 reassignbuf(bp, bp->b_vp); 3010 } else if (p) { 3011 ++p->p_stats->p_ru.ru_oublock; 3012 } 3013 brelse(bp); 3014 return (rtval); 3015 } 3016 3017 return (0); 3018 } 3019 3020 /* 3021 * nfs special file access vnode op. 3022 * Essentially just get vattr and then imitate iaccess() since the device is 3023 * local to the client. 3024 */ 3025 int 3026 nfsspec_access(ap) 3027 struct vop_access_args /* { 3028 struct vnode *a_vp; 3029 int a_mode; 3030 struct ucred *a_cred; 3031 struct proc *a_p; 3032 } */ *ap; 3033 { 3034 register struct vattr *vap; 3035 register gid_t *gp; 3036 register struct ucred *cred = ap->a_cred; 3037 struct vnode *vp = ap->a_vp; 3038 mode_t mode = ap->a_mode; 3039 struct vattr vattr; 3040 register int i; 3041 int error; 3042 3043 /* 3044 * Disallow write attempts on filesystems mounted read-only; 3045 * unless the file is a socket, fifo, or a block or character 3046 * device resident on the filesystem. 3047 */ 3048 if ((mode & VWRITE) && (vp->v_mount->mnt_flag & MNT_RDONLY)) { 3049 switch (vp->v_type) { 3050 case VREG: case VDIR: case VLNK: 3051 return (EROFS); 3052 } 3053 } 3054 /* 3055 * If you're the super-user, 3056 * you always get access. 3057 */ 3058 if (cred->cr_uid == 0) 3059 return (0); 3060 vap = &vattr; 3061 error = VOP_GETATTR(vp, vap, cred, ap->a_p); 3062 if (error) 3063 return (error); 3064 /* 3065 * Access check is based on only one of owner, group, public. 3066 * If not owner, then check group. If not a member of the 3067 * group, then check public access. 3068 */ 3069 if (cred->cr_uid != vap->va_uid) { 3070 mode >>= 3; 3071 gp = cred->cr_groups; 3072 for (i = 0; i < cred->cr_ngroups; i++, gp++) 3073 if (vap->va_gid == *gp) 3074 goto found; 3075 mode >>= 3; 3076 found: 3077 ; 3078 } 3079 error = (vap->va_mode & mode) == mode ? 0 : EACCES; 3080 return (error); 3081 } 3082 3083 /* 3084 * Read wrapper for special devices. 3085 */ 3086 int 3087 nfsspec_read(ap) 3088 struct vop_read_args /* { 3089 struct vnode *a_vp; 3090 struct uio *a_uio; 3091 int a_ioflag; 3092 struct ucred *a_cred; 3093 } */ *ap; 3094 { 3095 register struct nfsnode *np = VTONFS(ap->a_vp); 3096 3097 /* 3098 * Set access flag. 3099 */ 3100 np->n_flag |= NACC; 3101 np->n_atim.ts_sec = time.tv_sec; 3102 np->n_atim.ts_nsec = time.tv_usec * 1000; 3103 return (VOCALL(spec_vnodeop_p, VOFFSET(vop_read), ap)); 3104 } 3105 3106 /* 3107 * Write wrapper for special devices. 3108 */ 3109 int 3110 nfsspec_write(ap) 3111 struct vop_write_args /* { 3112 struct vnode *a_vp; 3113 struct uio *a_uio; 3114 int a_ioflag; 3115 struct ucred *a_cred; 3116 } */ *ap; 3117 { 3118 register struct nfsnode *np = VTONFS(ap->a_vp); 3119 3120 /* 3121 * Set update flag. 3122 */ 3123 np->n_flag |= NUPD; 3124 np->n_mtim.ts_sec = time.tv_sec; 3125 np->n_mtim.ts_nsec = time.tv_usec * 1000; 3126 return (VOCALL(spec_vnodeop_p, VOFFSET(vop_write), ap)); 3127 } 3128 3129 /* 3130 * Close wrapper for special devices. 3131 * 3132 * Update the times on the nfsnode then do device close. 3133 */ 3134 int 3135 nfsspec_close(ap) 3136 struct vop_close_args /* { 3137 struct vnode *a_vp; 3138 int a_fflag; 3139 struct ucred *a_cred; 3140 struct proc *a_p; 3141 } */ *ap; 3142 { 3143 register struct vnode *vp = ap->a_vp; 3144 register struct nfsnode *np = VTONFS(vp); 3145 struct vattr vattr; 3146 3147 if (np->n_flag & (NACC | NUPD)) { 3148 np->n_flag |= NCHG; 3149 if (vp->v_usecount == 1 && 3150 (vp->v_mount->mnt_flag & MNT_RDONLY) == 0) { 3151 VATTR_NULL(&vattr); 3152 if (np->n_flag & NACC) 3153 vattr.va_atime = np->n_atim; 3154 if (np->n_flag & NUPD) 3155 vattr.va_mtime = np->n_mtim; 3156 (void)VOP_SETATTR(vp, &vattr, ap->a_cred, ap->a_p); 3157 } 3158 } 3159 return (VOCALL(spec_vnodeop_p, VOFFSET(vop_close), ap)); 3160 } 3161 3162 /* 3163 * Read wrapper for fifos. 3164 */ 3165 int 3166 nfsfifo_read(ap) 3167 struct vop_read_args /* { 3168 struct vnode *a_vp; 3169 struct uio *a_uio; 3170 int a_ioflag; 3171 struct ucred *a_cred; 3172 } */ *ap; 3173 { 3174 extern int (**fifo_vnodeop_p)(); 3175 register struct nfsnode *np = VTONFS(ap->a_vp); 3176 3177 /* 3178 * Set access flag. 3179 */ 3180 np->n_flag |= NACC; 3181 np->n_atim.ts_sec = time.tv_sec; 3182 np->n_atim.ts_nsec = time.tv_usec * 1000; 3183 return (VOCALL(fifo_vnodeop_p, VOFFSET(vop_read), ap)); 3184 } 3185 3186 /* 3187 * Write wrapper for fifos. 3188 */ 3189 int 3190 nfsfifo_write(ap) 3191 struct vop_write_args /* { 3192 struct vnode *a_vp; 3193 struct uio *a_uio; 3194 int a_ioflag; 3195 struct ucred *a_cred; 3196 } */ *ap; 3197 { 3198 extern int (**fifo_vnodeop_p)(); 3199 register struct nfsnode *np = VTONFS(ap->a_vp); 3200 3201 /* 3202 * Set update flag. 3203 */ 3204 np->n_flag |= NUPD; 3205 np->n_mtim.ts_sec = time.tv_sec; 3206 np->n_mtim.ts_nsec = time.tv_usec * 1000; 3207 return (VOCALL(fifo_vnodeop_p, VOFFSET(vop_write), ap)); 3208 } 3209 3210 /* 3211 * Close wrapper for fifos. 3212 * 3213 * Update the times on the nfsnode then do fifo close. 3214 */ 3215 int 3216 nfsfifo_close(ap) 3217 struct vop_close_args /* { 3218 struct vnode *a_vp; 3219 int a_fflag; 3220 struct ucred *a_cred; 3221 struct proc *a_p; 3222 } */ *ap; 3223 { 3224 register struct vnode *vp = ap->a_vp; 3225 register struct nfsnode *np = VTONFS(vp); 3226 struct vattr vattr; 3227 extern int (**fifo_vnodeop_p)(); 3228 3229 if (np->n_flag & (NACC | NUPD)) { 3230 if (np->n_flag & NACC) { 3231 np->n_atim.ts_sec = time.tv_sec; 3232 np->n_atim.ts_nsec = time.tv_usec * 1000; 3233 } 3234 if (np->n_flag & NUPD) { 3235 np->n_mtim.ts_sec = time.tv_sec; 3236 np->n_mtim.ts_nsec = time.tv_usec * 1000; 3237 } 3238 np->n_flag |= NCHG; 3239 if (vp->v_usecount == 1 && 3240 (vp->v_mount->mnt_flag & MNT_RDONLY) == 0) { 3241 VATTR_NULL(&vattr); 3242 if (np->n_flag & NACC) 3243 vattr.va_atime = np->n_atim; 3244 if (np->n_flag & NUPD) 3245 vattr.va_mtime = np->n_mtim; 3246 (void)VOP_SETATTR(vp, &vattr, ap->a_cred, ap->a_p); 3247 } 3248 } 3249 return (VOCALL(fifo_vnodeop_p, VOFFSET(vop_close), ap)); 3250 } 3251
Indexes created Thu Oct 23 22:10:10 GMT 2025