nfs_vnops.c revision 1.100.2.2
1 /* $NetBSD: nfs_vnops.c,v 1.100.2.2 2000/01/05 23:39:50 he Exp $ */ 2 3 /* 4 * Copyright (c) 1989, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * This code is derived from software contributed to Berkeley by 8 * Rick Macklem at The University of Guelph. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the University of 21 * California, Berkeley and its contributors. 22 * 4. Neither the name of the University nor the names of its contributors 23 * may be used to endorse or promote products derived from this software 24 * without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 27 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 28 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 29 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 30 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 31 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 32 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 33 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 34 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 35 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 36 * SUCH DAMAGE. 37 * 38 * @(#)nfs_vnops.c 8.19 (Berkeley) 7/31/95 39 */ 40 41 /* 42 * vnode op calls for Sun NFS version 2 and 3 43 */ 44 45 #include <sys/param.h> 46 #include <sys/proc.h> 47 #include <sys/kernel.h> 48 #include <sys/systm.h> 49 #include <sys/resourcevar.h> 50 #include <sys/proc.h> 51 #include <sys/mount.h> 52 #include <sys/buf.h> 53 #include <sys/malloc.h> 54 #include <sys/mbuf.h> 55 #include <sys/conf.h> 56 #include <sys/namei.h> 57 #include <sys/vnode.h> 58 #include <sys/dirent.h> 59 #include <sys/fcntl.h> 60 #include <sys/lockf.h> 61 #include <sys/stat.h> 62 #include <sys/unistd.h> 63 64 #include <vm/vm.h> 65 66 #include <uvm/uvm_extern.h> 67 68 #include <miscfs/fifofs/fifo.h> 69 #include <miscfs/genfs/genfs.h> 70 #include <miscfs/specfs/specdev.h> 71 72 #include <nfs/rpcv2.h> 73 #include <nfs/nfsproto.h> 74 #include <nfs/nfs.h> 75 #include <nfs/nfsnode.h> 76 #include <nfs/nfsmount.h> 77 #include <nfs/xdr_subs.h> 78 #include <nfs/nfsm_subs.h> 79 #include <nfs/nqnfs.h> 80 #include <nfs/nfs_var.h> 81 82 #include <net/if.h> 83 #include <netinet/in.h> 84 #include <netinet/in_var.h> 85 86 /* Defs */ 87 #define TRUE 1 88 #define FALSE 0 89 90 /* 91 * Global vfs data structures for nfs 92 */ 93 int (**nfsv2_vnodeop_p) __P((void *)); 94 struct vnodeopv_entry_desc nfsv2_vnodeop_entries[] = { 95 { &vop_default_desc, vn_default_error }, 96 { &vop_lookup_desc, nfs_lookup }, /* lookup */ 97 { &vop_create_desc, nfs_create }, /* create */ 98 { &vop_mknod_desc, nfs_mknod }, /* mknod */ 99 { &vop_open_desc, nfs_open }, /* open */ 100 { &vop_close_desc, nfs_close }, /* close */ 101 { &vop_access_desc, nfs_access }, /* access */ 102 { &vop_getattr_desc, nfs_getattr }, /* getattr */ 103 { &vop_setattr_desc, nfs_setattr }, /* setattr */ 104 { &vop_read_desc, nfs_read }, /* read */ 105 { &vop_write_desc, nfs_write }, /* write */ 106 { &vop_lease_desc, nfs_lease_check }, /* lease */ 107 { &vop_ioctl_desc, nfs_ioctl }, /* ioctl */ 108 { &vop_poll_desc, nfs_poll }, /* poll */ 109 { &vop_revoke_desc, nfs_revoke }, /* revoke */ 110 { &vop_mmap_desc, nfs_mmap }, /* mmap */ 111 { &vop_fsync_desc, nfs_fsync }, /* fsync */ 112 { &vop_seek_desc, nfs_seek }, /* seek */ 113 { &vop_remove_desc, nfs_remove }, /* remove */ 114 { &vop_link_desc, nfs_link }, /* link */ 115 { &vop_rename_desc, nfs_rename }, /* rename */ 116 { &vop_mkdir_desc, nfs_mkdir }, /* mkdir */ 117 { &vop_rmdir_desc, nfs_rmdir }, /* rmdir */ 118 { &vop_symlink_desc, nfs_symlink }, /* symlink */ 119 { &vop_readdir_desc, nfs_readdir }, /* readdir */ 120 { &vop_readlink_desc, nfs_readlink }, /* readlink */ 121 { &vop_abortop_desc, nfs_abortop }, /* abortop */ 122 { &vop_inactive_desc, nfs_inactive }, /* inactive */ 123 { &vop_reclaim_desc, nfs_reclaim }, /* reclaim */ 124 { &vop_lock_desc, nfs_lock }, /* lock */ 125 { &vop_unlock_desc, nfs_unlock }, /* unlock */ 126 { &vop_bmap_desc, nfs_bmap }, /* bmap */ 127 { &vop_strategy_desc, nfs_strategy }, /* strategy */ 128 { &vop_print_desc, nfs_print }, /* print */ 129 { &vop_islocked_desc, nfs_islocked }, /* islocked */ 130 { &vop_pathconf_desc, nfs_pathconf }, /* pathconf */ 131 { &vop_advlock_desc, nfs_advlock }, /* advlock */ 132 { &vop_blkatoff_desc, nfs_blkatoff }, /* blkatoff */ 133 { &vop_valloc_desc, nfs_valloc }, /* valloc */ 134 { &vop_reallocblks_desc, nfs_reallocblks }, /* reallocblks */ 135 { &vop_vfree_desc, nfs_vfree }, /* vfree */ 136 { &vop_truncate_desc, nfs_truncate }, /* truncate */ 137 { &vop_update_desc, nfs_update }, /* update */ 138 { &vop_bwrite_desc, nfs_bwrite }, /* bwrite */ 139 { (struct vnodeop_desc*)NULL, (int(*) __P((void *)))NULL } 140 }; 141 struct vnodeopv_desc nfsv2_vnodeop_opv_desc = 142 { &nfsv2_vnodeop_p, nfsv2_vnodeop_entries }; 143 144 /* 145 * Special device vnode ops 146 */ 147 int (**spec_nfsv2nodeop_p) __P((void *)); 148 struct vnodeopv_entry_desc spec_nfsv2nodeop_entries[] = { 149 { &vop_default_desc, vn_default_error }, 150 { &vop_lookup_desc, spec_lookup }, /* lookup */ 151 { &vop_create_desc, spec_create }, /* create */ 152 { &vop_mknod_desc, spec_mknod }, /* mknod */ 153 { &vop_open_desc, spec_open }, /* open */ 154 { &vop_close_desc, nfsspec_close }, /* close */ 155 { &vop_access_desc, nfsspec_access }, /* access */ 156 { &vop_getattr_desc, nfs_getattr }, /* getattr */ 157 { &vop_setattr_desc, nfs_setattr }, /* setattr */ 158 { &vop_read_desc, nfsspec_read }, /* read */ 159 { &vop_write_desc, nfsspec_write }, /* write */ 160 { &vop_lease_desc, spec_lease_check }, /* lease */ 161 { &vop_ioctl_desc, spec_ioctl }, /* ioctl */ 162 { &vop_poll_desc, spec_poll }, /* poll */ 163 { &vop_revoke_desc, spec_revoke }, /* revoke */ 164 { &vop_mmap_desc, spec_mmap }, /* mmap */ 165 { &vop_fsync_desc, nfs_fsync }, /* fsync */ 166 { &vop_seek_desc, spec_seek }, /* seek */ 167 { &vop_remove_desc, spec_remove }, /* remove */ 168 { &vop_link_desc, spec_link }, /* link */ 169 { &vop_rename_desc, spec_rename }, /* rename */ 170 { &vop_mkdir_desc, spec_mkdir }, /* mkdir */ 171 { &vop_rmdir_desc, spec_rmdir }, /* rmdir */ 172 { &vop_symlink_desc, spec_symlink }, /* symlink */ 173 { &vop_readdir_desc, spec_readdir }, /* readdir */ 174 { &vop_readlink_desc, spec_readlink }, /* readlink */ 175 { &vop_abortop_desc, spec_abortop }, /* abortop */ 176 { &vop_inactive_desc, nfs_inactive }, /* inactive */ 177 { &vop_reclaim_desc, nfs_reclaim }, /* reclaim */ 178 { &vop_lock_desc, nfs_lock }, /* lock */ 179 { &vop_unlock_desc, nfs_unlock }, /* unlock */ 180 { &vop_bmap_desc, spec_bmap }, /* bmap */ 181 { &vop_strategy_desc, spec_strategy }, /* strategy */ 182 { &vop_print_desc, nfs_print }, /* print */ 183 { &vop_islocked_desc, nfs_islocked }, /* islocked */ 184 { &vop_pathconf_desc, spec_pathconf }, /* pathconf */ 185 { &vop_advlock_desc, spec_advlock }, /* advlock */ 186 { &vop_blkatoff_desc, spec_blkatoff }, /* blkatoff */ 187 { &vop_valloc_desc, spec_valloc }, /* valloc */ 188 { &vop_reallocblks_desc, spec_reallocblks }, /* reallocblks */ 189 { &vop_vfree_desc, spec_vfree }, /* vfree */ 190 { &vop_truncate_desc, spec_truncate }, /* truncate */ 191 { &vop_update_desc, nfs_update }, /* update */ 192 { &vop_bwrite_desc, vn_bwrite }, /* bwrite */ 193 { (struct vnodeop_desc*)NULL, (int(*) __P((void *)))NULL } 194 }; 195 struct vnodeopv_desc spec_nfsv2nodeop_opv_desc = 196 { &spec_nfsv2nodeop_p, spec_nfsv2nodeop_entries }; 197 198 int (**fifo_nfsv2nodeop_p) __P((void *)); 199 struct vnodeopv_entry_desc fifo_nfsv2nodeop_entries[] = { 200 { &vop_default_desc, vn_default_error }, 201 { &vop_lookup_desc, fifo_lookup }, /* lookup */ 202 { &vop_create_desc, fifo_create }, /* create */ 203 { &vop_mknod_desc, fifo_mknod }, /* mknod */ 204 { &vop_open_desc, fifo_open }, /* open */ 205 { &vop_close_desc, nfsfifo_close }, /* close */ 206 { &vop_access_desc, nfsspec_access }, /* access */ 207 { &vop_getattr_desc, nfs_getattr }, /* getattr */ 208 { &vop_setattr_desc, nfs_setattr }, /* setattr */ 209 { &vop_read_desc, nfsfifo_read }, /* read */ 210 { &vop_write_desc, nfsfifo_write }, /* write */ 211 { &vop_lease_desc, fifo_lease_check }, /* lease */ 212 { &vop_ioctl_desc, fifo_ioctl }, /* ioctl */ 213 { &vop_poll_desc, fifo_poll }, /* poll */ 214 { &vop_revoke_desc, fifo_revoke }, /* revoke */ 215 { &vop_mmap_desc, fifo_mmap }, /* mmap */ 216 { &vop_fsync_desc, nfs_fsync }, /* fsync */ 217 { &vop_seek_desc, fifo_seek }, /* seek */ 218 { &vop_remove_desc, fifo_remove }, /* remove */ 219 { &vop_link_desc, fifo_link }, /* link */ 220 { &vop_rename_desc, fifo_rename }, /* rename */ 221 { &vop_mkdir_desc, fifo_mkdir }, /* mkdir */ 222 { &vop_rmdir_desc, fifo_rmdir }, /* rmdir */ 223 { &vop_symlink_desc, fifo_symlink }, /* symlink */ 224 { &vop_readdir_desc, fifo_readdir }, /* readdir */ 225 { &vop_readlink_desc, fifo_readlink }, /* readlink */ 226 { &vop_abortop_desc, fifo_abortop }, /* abortop */ 227 { &vop_inactive_desc, nfs_inactive }, /* inactive */ 228 { &vop_reclaim_desc, nfs_reclaim }, /* reclaim */ 229 { &vop_lock_desc, nfs_lock }, /* lock */ 230 { &vop_unlock_desc, nfs_unlock }, /* unlock */ 231 { &vop_bmap_desc, fifo_bmap }, /* bmap */ 232 { &vop_strategy_desc, genfs_badop }, /* strategy */ 233 { &vop_print_desc, nfs_print }, /* print */ 234 { &vop_islocked_desc, nfs_islocked }, /* islocked */ 235 { &vop_pathconf_desc, fifo_pathconf }, /* pathconf */ 236 { &vop_advlock_desc, fifo_advlock }, /* advlock */ 237 { &vop_blkatoff_desc, fifo_blkatoff }, /* blkatoff */ 238 { &vop_valloc_desc, fifo_valloc }, /* valloc */ 239 { &vop_reallocblks_desc, fifo_reallocblks }, /* reallocblks */ 240 { &vop_vfree_desc, fifo_vfree }, /* vfree */ 241 { &vop_truncate_desc, fifo_truncate }, /* truncate */ 242 { &vop_update_desc, nfs_update }, /* update */ 243 { &vop_bwrite_desc, vn_bwrite }, /* bwrite */ 244 { (struct vnodeop_desc*)NULL, (int(*) __P((void *)))NULL } 245 }; 246 struct vnodeopv_desc fifo_nfsv2nodeop_opv_desc = 247 { &fifo_nfsv2nodeop_p, fifo_nfsv2nodeop_entries }; 248 249 /* 250 * Global variables 251 */ 252 extern u_int32_t nfs_true, nfs_false; 253 extern u_int32_t nfs_xdrneg1; 254 extern struct nfsstats nfsstats; 255 extern nfstype nfsv3_type[9]; 256 struct proc *nfs_iodwant[NFS_MAXASYNCDAEMON]; 257 struct nfsmount *nfs_iodmount[NFS_MAXASYNCDAEMON]; 258 int nfs_numasync = 0; 259 #define DIRHDSIZ (sizeof (struct dirent) - (MAXNAMLEN + 1)) 260 261 /* 262 * nfs null call from vfs. 263 */ 264 int 265 nfs_null(vp, cred, procp) 266 struct vnode *vp; 267 struct ucred *cred; 268 struct proc *procp; 269 { 270 caddr_t bpos, dpos; 271 int error = 0; 272 struct mbuf *mreq, *mrep, *md, *mb; 273 274 nfsm_reqhead(vp, NFSPROC_NULL, 0); 275 nfsm_request(vp, NFSPROC_NULL, procp, cred); 276 nfsm_reqdone; 277 return (error); 278 } 279 280 /* 281 * nfs access vnode op. 282 * For nfs version 2, just return ok. File accesses may fail later. 283 * For nfs version 3, use the access rpc to check accessibility. If file modes 284 * are changed on the server, accesses might still fail later. 285 */ 286 int 287 nfs_access(v) 288 void *v; 289 { 290 struct vop_access_args /* { 291 struct vnode *a_vp; 292 int a_mode; 293 struct ucred *a_cred; 294 struct proc *a_p; 295 } */ *ap = v; 296 register struct vnode *vp = ap->a_vp; 297 register u_int32_t *tl; 298 register caddr_t cp; 299 register int32_t t1, t2; 300 caddr_t bpos, dpos, cp2; 301 int error = 0, attrflag, cachevalid; 302 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 303 u_int32_t mode, rmode; 304 int v3 = NFS_ISV3(vp); 305 struct nfsnode *np = VTONFS(vp); 306 307 cachevalid = (np->n_accstamp != -1 && 308 (time.tv_sec - np->n_accstamp) < NFS_ATTRTIMEO(np) && 309 np->n_accuid == ap->a_cred->cr_uid); 310 311 /* 312 * Check access cache first. If this request has been made for this 313 * uid shortly before, use the cached result. 314 */ 315 if (cachevalid && ((np->n_accmode & ap->a_mode) == ap->a_mode)) 316 return np->n_accerror; 317 318 /* 319 * For nfs v3, do an access rpc, otherwise you are stuck emulating 320 * ufs_access() locally using the vattr. This may not be correct, 321 * since the server may apply other access criteria such as 322 * client uid-->server uid mapping that we do not know about, but 323 * this is better than just returning anything that is lying about 324 * in the cache. 325 */ 326 if (v3) { 327 nfsstats.rpccnt[NFSPROC_ACCESS]++; 328 nfsm_reqhead(vp, NFSPROC_ACCESS, NFSX_FH(v3) + NFSX_UNSIGNED); 329 nfsm_fhtom(vp, v3); 330 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); 331 if (ap->a_mode & VREAD) 332 mode = NFSV3ACCESS_READ; 333 else 334 mode = 0; 335 if (vp->v_type != VDIR) { 336 if (ap->a_mode & VWRITE) 337 mode |= (NFSV3ACCESS_MODIFY | NFSV3ACCESS_EXTEND); 338 if (ap->a_mode & VEXEC) 339 mode |= NFSV3ACCESS_EXECUTE; 340 } else { 341 if (ap->a_mode & VWRITE) 342 mode |= (NFSV3ACCESS_MODIFY | NFSV3ACCESS_EXTEND | 343 NFSV3ACCESS_DELETE); 344 if (ap->a_mode & VEXEC) 345 mode |= NFSV3ACCESS_LOOKUP; 346 } 347 *tl = txdr_unsigned(mode); 348 nfsm_request(vp, NFSPROC_ACCESS, ap->a_p, ap->a_cred); 349 nfsm_postop_attr(vp, attrflag); 350 if (!error) { 351 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 352 rmode = fxdr_unsigned(u_int32_t, *tl); 353 /* 354 * The NFS V3 spec does not clarify whether or not 355 * the returned access bits can be a superset of 356 * the ones requested, so... 357 */ 358 if ((rmode & mode) != mode) 359 error = EACCES; 360 } 361 nfsm_reqdone; 362 } else 363 return (nfsspec_access(ap)); 364 /* 365 * Disallow write attempts on filesystems mounted read-only; 366 * unless the file is a socket, fifo, or a block or character 367 * device resident on the filesystem. 368 */ 369 if (!error && (ap->a_mode & VWRITE) && 370 (vp->v_mount->mnt_flag & MNT_RDONLY)) { 371 switch (vp->v_type) { 372 case VREG: 373 case VDIR: 374 case VLNK: 375 error = EROFS; 376 default: 377 break; 378 } 379 } 380 381 if (!error || error == EACCES) { 382 /* 383 * If we got the same result as for a previous, 384 * different request, OR it in. Don't update 385 * the timestamp in that case. 386 */ 387 if (cachevalid && error == np->n_accerror) 388 np->n_accmode |= ap->a_mode; 389 else { 390 np->n_accstamp = time.tv_sec; 391 np->n_accuid = ap->a_cred->cr_uid; 392 np->n_accmode = ap->a_mode; 393 np->n_accerror = error; 394 } 395 } 396 397 return (error); 398 } 399 400 /* 401 * nfs open vnode op 402 * Check to see if the type is ok 403 * and that deletion is not in progress. 404 * For paged in text files, you will need to flush the page cache 405 * if consistency is lost. 406 */ 407 /* ARGSUSED */ 408 int 409 nfs_open(v) 410 void *v; 411 { 412 struct vop_open_args /* { 413 struct vnode *a_vp; 414 int a_mode; 415 struct ucred *a_cred; 416 struct proc *a_p; 417 } */ *ap = v; 418 register struct vnode *vp = ap->a_vp; 419 struct nfsnode *np = VTONFS(vp); 420 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 421 struct vattr vattr; 422 int error; 423 424 if (vp->v_type != VREG && vp->v_type != VDIR && vp->v_type != VLNK) { 425 #ifdef DIAGNOSTIC 426 printf("open eacces vtyp=%d\n",vp->v_type); 427 #endif 428 return (EACCES); 429 } 430 /* 431 * Get a valid lease. If cached data is stale, flush it. 432 */ 433 if (nmp->nm_flag & NFSMNT_NQNFS) { 434 if (NQNFS_CKINVALID(vp, np, ND_READ)) { 435 do { 436 error = nqnfs_getlease(vp, ND_READ, ap->a_cred, 437 ap->a_p); 438 } while (error == NQNFS_EXPIRED); 439 if (error) 440 return (error); 441 if (np->n_lrev != np->n_brev || 442 (np->n_flag & NQNFSNONCACHE)) { 443 if ((error = nfs_vinvalbuf(vp, V_SAVE, ap->a_cred, 444 ap->a_p, 1)) == EINTR) 445 return (error); 446 (void) uvm_vnp_uncache(vp); 447 np->n_brev = np->n_lrev; 448 } 449 } 450 } else { 451 if (np->n_flag & NMODIFIED) { 452 if ((error = nfs_vinvalbuf(vp, V_SAVE, ap->a_cred, 453 ap->a_p, 1)) == EINTR) 454 return (error); 455 (void) uvm_vnp_uncache(vp); 456 np->n_attrstamp = 0; 457 if (vp->v_type == VDIR) { 458 nfs_invaldircache(vp, 0); 459 np->n_direofoffset = 0; 460 } 461 error = VOP_GETATTR(vp, &vattr, ap->a_cred, ap->a_p); 462 if (error) 463 return (error); 464 np->n_mtime = vattr.va_mtime.tv_sec; 465 } else { 466 error = VOP_GETATTR(vp, &vattr, ap->a_cred, ap->a_p); 467 if (error) 468 return (error); 469 if (np->n_mtime != vattr.va_mtime.tv_sec) { 470 if (vp->v_type == VDIR) { 471 nfs_invaldircache(vp, 0); 472 np->n_direofoffset = 0; 473 } 474 if ((error = nfs_vinvalbuf(vp, V_SAVE, 475 ap->a_cred, ap->a_p, 1)) == EINTR) 476 return (error); 477 (void) uvm_vnp_uncache(vp); 478 np->n_mtime = vattr.va_mtime.tv_sec; 479 } 480 } 481 } 482 if ((nmp->nm_flag & NFSMNT_NQNFS) == 0) 483 np->n_attrstamp = 0; /* For Open/Close consistency */ 484 return (0); 485 } 486 487 /* 488 * nfs close vnode op 489 * What an NFS client should do upon close after writing is a debatable issue. 490 * Most NFS clients push delayed writes to the server upon close, basically for 491 * two reasons: 492 * 1 - So that any write errors may be reported back to the client process 493 * doing the close system call. By far the two most likely errors are 494 * NFSERR_NOSPC and NFSERR_DQUOT to indicate space allocation failure. 495 * 2 - To put a worst case upper bound on cache inconsistency between 496 * multiple clients for the file. 497 * There is also a consistency problem for Version 2 of the protocol w.r.t. 498 * not being able to tell if other clients are writing a file concurrently, 499 * since there is no way of knowing if the changed modify time in the reply 500 * is only due to the write for this client. 501 * (NFS Version 3 provides weak cache consistency data in the reply that 502 * should be sufficient to detect and handle this case.) 503 * 504 * The current code does the following: 505 * for NFS Version 2 - play it safe and flush/invalidate all dirty buffers 506 * for NFS Version 3 - flush dirty buffers to the server but don't invalidate 507 * or commit them (this satisfies 1 and 2 except for the 508 * case where the server crashes after this close but 509 * before the commit RPC, which is felt to be "good 510 * enough". Changing the last argument to nfs_flush() to 511 * a 1 would force a commit operation, if it is felt a 512 * commit is necessary now. 513 * for NQNFS - do nothing now, since 2 is dealt with via leases and 514 * 1 should be dealt with via an fsync() system call for 515 * cases where write errors are important. 516 */ 517 /* ARGSUSED */ 518 int 519 nfs_close(v) 520 void *v; 521 { 522 struct vop_close_args /* { 523 struct vnodeop_desc *a_desc; 524 struct vnode *a_vp; 525 int a_fflag; 526 struct ucred *a_cred; 527 struct proc *a_p; 528 } */ *ap = v; 529 register struct vnode *vp = ap->a_vp; 530 register struct nfsnode *np = VTONFS(vp); 531 int error = 0; 532 533 if (vp->v_type == VREG) { 534 if ((VFSTONFS(vp->v_mount)->nm_flag & NFSMNT_NQNFS) == 0 && 535 (np->n_flag & NMODIFIED)) { 536 if (NFS_ISV3(vp)) { 537 error = nfs_flush(vp, ap->a_cred, MNT_WAIT, ap->a_p, 0); 538 np->n_flag &= ~NMODIFIED; 539 } else 540 error = nfs_vinvalbuf(vp, V_SAVE, ap->a_cred, ap->a_p, 1); 541 np->n_attrstamp = 0; 542 } 543 if (np->n_flag & NWRITEERR) { 544 np->n_flag &= ~NWRITEERR; 545 error = np->n_error; 546 } 547 } 548 return (error); 549 } 550 551 /* 552 * nfs getattr call from vfs. 553 */ 554 int 555 nfs_getattr(v) 556 void *v; 557 { 558 struct vop_getattr_args /* { 559 struct vnode *a_vp; 560 struct vattr *a_vap; 561 struct ucred *a_cred; 562 struct proc *a_p; 563 } */ *ap = v; 564 register struct vnode *vp = ap->a_vp; 565 register struct nfsnode *np = VTONFS(vp); 566 register caddr_t cp; 567 register u_int32_t *tl; 568 register int32_t t1, t2; 569 caddr_t bpos, dpos; 570 int error = 0; 571 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 572 int v3 = NFS_ISV3(vp); 573 574 /* 575 * Update local times for special files. 576 */ 577 if (np->n_flag & (NACC | NUPD)) 578 np->n_flag |= NCHG; 579 /* 580 * First look in the cache. 581 */ 582 if (nfs_getattrcache(vp, ap->a_vap) == 0) 583 return (0); 584 nfsstats.rpccnt[NFSPROC_GETATTR]++; 585 nfsm_reqhead(vp, NFSPROC_GETATTR, NFSX_FH(v3)); 586 nfsm_fhtom(vp, v3); 587 nfsm_request(vp, NFSPROC_GETATTR, ap->a_p, ap->a_cred); 588 if (!error) { 589 nfsm_loadattr(vp, ap->a_vap); 590 if (vp->v_type == VDIR && 591 ap->a_vap->va_blocksize < NFS_DIRFRAGSIZ) 592 ap->a_vap->va_blocksize = NFS_DIRFRAGSIZ; 593 } 594 nfsm_reqdone; 595 return (error); 596 } 597 598 /* 599 * nfs setattr call. 600 */ 601 int 602 nfs_setattr(v) 603 void *v; 604 { 605 struct vop_setattr_args /* { 606 struct vnodeop_desc *a_desc; 607 struct vnode *a_vp; 608 struct vattr *a_vap; 609 struct ucred *a_cred; 610 struct proc *a_p; 611 } */ *ap = v; 612 register struct vnode *vp = ap->a_vp; 613 register struct nfsnode *np = VTONFS(vp); 614 register struct vattr *vap = ap->a_vap; 615 int error = 0; 616 u_quad_t tsize = 0; 617 618 /* 619 * Setting of flags is not supported. 620 */ 621 if (vap->va_flags != VNOVAL) 622 return (EOPNOTSUPP); 623 624 /* 625 * Disallow write attempts if the filesystem is mounted read-only. 626 */ 627 if ((vap->va_uid != (uid_t)VNOVAL || 628 vap->va_gid != (gid_t)VNOVAL || vap->va_atime.tv_sec != VNOVAL || 629 vap->va_mtime.tv_sec != VNOVAL || vap->va_mode != (mode_t)VNOVAL) && 630 (vp->v_mount->mnt_flag & MNT_RDONLY)) 631 return (EROFS); 632 if (vap->va_size != VNOVAL) { 633 switch (vp->v_type) { 634 case VDIR: 635 return (EISDIR); 636 case VCHR: 637 case VBLK: 638 case VSOCK: 639 case VFIFO: 640 if (vap->va_mtime.tv_sec == VNOVAL && 641 vap->va_atime.tv_sec == VNOVAL && 642 vap->va_mode == (mode_t)VNOVAL && 643 vap->va_uid == (uid_t)VNOVAL && 644 vap->va_gid == (gid_t)VNOVAL) 645 return (0); 646 vap->va_size = VNOVAL; 647 break; 648 default: 649 /* 650 * Disallow write attempts if the filesystem is 651 * mounted read-only. 652 */ 653 if (vp->v_mount->mnt_flag & MNT_RDONLY) 654 return (EROFS); 655 uvm_vnp_setsize(vp, vap->va_size); 656 if (vap->va_size == 0) 657 error = nfs_vinvalbuf(vp, 0, 658 ap->a_cred, ap->a_p, 1); 659 else 660 error = nfs_vinvalbuf(vp, V_SAVE, 661 ap->a_cred, ap->a_p, 1); 662 if (error) { 663 uvm_vnp_setsize(vp, np->n_size); 664 return (error); 665 } 666 tsize = np->n_size; 667 np->n_size = np->n_vattr->va_size = vap->va_size; 668 } 669 } else if ((vap->va_mtime.tv_sec != VNOVAL || 670 vap->va_atime.tv_sec != VNOVAL) && 671 vp->v_type == VREG && 672 (error = nfs_vinvalbuf(vp, V_SAVE, ap->a_cred, 673 ap->a_p, 1)) == EINTR) 674 return (error); 675 error = nfs_setattrrpc(vp, vap, ap->a_cred, ap->a_p); 676 if (error && vap->va_size != VNOVAL) { 677 np->n_size = np->n_vattr->va_size = tsize; 678 uvm_vnp_setsize(vp, np->n_size); 679 } 680 return (error); 681 } 682 683 /* 684 * Do an nfs setattr rpc. 685 */ 686 int 687 nfs_setattrrpc(vp, vap, cred, procp) 688 register struct vnode *vp; 689 register struct vattr *vap; 690 struct ucred *cred; 691 struct proc *procp; 692 { 693 register struct nfsv2_sattr *sp; 694 register caddr_t cp; 695 register int32_t t1, t2; 696 caddr_t bpos, dpos, cp2; 697 u_int32_t *tl; 698 int error = 0, wccflag = NFSV3_WCCRATTR; 699 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 700 int v3 = NFS_ISV3(vp); 701 702 nfsstats.rpccnt[NFSPROC_SETATTR]++; 703 nfsm_reqhead(vp, NFSPROC_SETATTR, NFSX_FH(v3) + NFSX_SATTR(v3)); 704 nfsm_fhtom(vp, v3); 705 if (v3) { 706 nfsm_v3attrbuild(vap, TRUE); 707 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); 708 *tl = nfs_false; 709 } else { 710 nfsm_build(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 711 if (vap->va_mode == (mode_t)VNOVAL) 712 sp->sa_mode = nfs_xdrneg1; 713 else 714 sp->sa_mode = vtonfsv2_mode(vp->v_type, vap->va_mode); 715 if (vap->va_uid == (uid_t)VNOVAL) 716 sp->sa_uid = nfs_xdrneg1; 717 else 718 sp->sa_uid = txdr_unsigned(vap->va_uid); 719 if (vap->va_gid == (gid_t)VNOVAL) 720 sp->sa_gid = nfs_xdrneg1; 721 else 722 sp->sa_gid = txdr_unsigned(vap->va_gid); 723 sp->sa_size = txdr_unsigned(vap->va_size); 724 txdr_nfsv2time(&vap->va_atime, &sp->sa_atime); 725 txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime); 726 } 727 nfsm_request(vp, NFSPROC_SETATTR, procp, cred); 728 if (v3) { 729 nfsm_wcc_data(vp, wccflag); 730 } else 731 nfsm_loadattr(vp, (struct vattr *)0); 732 nfsm_reqdone; 733 return (error); 734 } 735 736 /* 737 * nfs lookup call, one step at a time... 738 * First look in cache 739 * If not found, unlock the directory nfsnode and do the rpc 740 */ 741 int 742 nfs_lookup(v) 743 void *v; 744 { 745 struct vop_lookup_args /* { 746 struct vnodeop_desc *a_desc; 747 struct vnode *a_dvp; 748 struct vnode **a_vpp; 749 struct componentname *a_cnp; 750 } */ *ap = v; 751 struct componentname *cnp = ap->a_cnp; 752 struct vnode *dvp = ap->a_dvp; 753 struct vnode **vpp = ap->a_vpp; 754 int flags = cnp->cn_flags; 755 struct vnode *newvp; 756 u_int32_t *tl; 757 caddr_t cp; 758 int32_t t1, t2; 759 struct nfsmount *nmp; 760 caddr_t bpos, dpos, cp2; 761 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 762 long len; 763 nfsfh_t *fhp; 764 struct nfsnode *np; 765 int lockparent, wantparent, error = 0, attrflag, fhsize; 766 int v3 = NFS_ISV3(dvp); 767 768 *vpp = NULLVP; 769 if ((flags & ISLASTCN) && (dvp->v_mount->mnt_flag & MNT_RDONLY) && 770 (cnp->cn_nameiop == DELETE || cnp->cn_nameiop == RENAME)) 771 return (EROFS); 772 if (dvp->v_type != VDIR) 773 return (ENOTDIR); 774 775 lockparent = flags & LOCKPARENT; 776 wantparent = flags & (LOCKPARENT|WANTPARENT); 777 nmp = VFSTONFS(dvp->v_mount); 778 np = VTONFS(dvp); 779 if ((error = cache_lookup(dvp, vpp, cnp)) != 0) { 780 struct vattr vattr; 781 int vpid, err2; 782 783 err2 = VOP_ACCESS(dvp, VEXEC, cnp->cn_cred, cnp->cn_proc); 784 if (err2) { 785 *vpp = NULLVP; 786 return (err2); 787 } 788 789 if (error == ENOENT) { 790 if (!VOP_GETATTR(dvp, &vattr, cnp->cn_cred, 791 cnp->cn_proc) && vattr.va_mtime.tv_sec == 792 VTONFS(dvp)->n_nctime) 793 return (ENOENT); 794 cache_purge(dvp); 795 np->n_nctime = 0; 796 goto dorpc; 797 } 798 799 newvp = *vpp; 800 vpid = newvp->v_id; 801 /* 802 * See the comment starting `Step through' in ufs/ufs_lookup.c 803 * for an explanation of the locking protocol 804 */ 805 if (dvp == newvp) { 806 VREF(newvp); 807 error = 0; 808 } else 809 error = vget(newvp, LK_EXCLUSIVE); 810 if (!error) { 811 if (vpid == newvp->v_id) { 812 if (!VOP_GETATTR(newvp, &vattr, cnp->cn_cred, cnp->cn_proc) 813 && vattr.va_ctime.tv_sec == VTONFS(newvp)->n_ctime) { 814 nfsstats.lookupcache_hits++; 815 if (cnp->cn_nameiop != LOOKUP && 816 (flags & ISLASTCN)) 817 cnp->cn_flags |= SAVENAME; 818 return (0); 819 } 820 cache_purge(newvp); 821 } 822 vrele(newvp); 823 } 824 *vpp = NULLVP; 825 } 826 dorpc: 827 error = 0; 828 newvp = NULLVP; 829 nfsstats.lookupcache_misses++; 830 nfsstats.rpccnt[NFSPROC_LOOKUP]++; 831 len = cnp->cn_namelen; 832 nfsm_reqhead(dvp, NFSPROC_LOOKUP, 833 NFSX_FH(v3) + NFSX_UNSIGNED + nfsm_rndup(len)); 834 nfsm_fhtom(dvp, v3); 835 nfsm_strtom(cnp->cn_nameptr, len, NFS_MAXNAMLEN); 836 nfsm_request(dvp, NFSPROC_LOOKUP, cnp->cn_proc, cnp->cn_cred); 837 if (error) { 838 nfsm_postop_attr(dvp, attrflag); 839 m_freem(mrep); 840 goto nfsmout; 841 } 842 nfsm_getfh(fhp, fhsize, v3); 843 844 /* 845 * Handle RENAME case... 846 */ 847 if (cnp->cn_nameiop == RENAME && wantparent && (flags & ISLASTCN)) { 848 if (NFS_CMPFH(np, fhp, fhsize)) { 849 m_freem(mrep); 850 return (EISDIR); 851 } 852 error = nfs_nget(dvp->v_mount, fhp, fhsize, &np); 853 if (error) { 854 m_freem(mrep); 855 return (error); 856 } 857 newvp = NFSTOV(np); 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 *vpp = newvp; 864 m_freem(mrep); 865 cnp->cn_flags |= SAVENAME; 866 return (0); 867 } 868 869 if (NFS_CMPFH(np, fhp, fhsize)) { 870 VREF(dvp); 871 newvp = dvp; 872 } else { 873 error = nfs_nget(dvp->v_mount, fhp, fhsize, &np); 874 if (error) { 875 m_freem(mrep); 876 return (error); 877 } 878 newvp = NFSTOV(np); 879 } 880 if (v3) { 881 nfsm_postop_attr(newvp, attrflag); 882 nfsm_postop_attr(dvp, attrflag); 883 } else 884 nfsm_loadattr(newvp, (struct vattr *)0); 885 if (cnp->cn_nameiop != LOOKUP && (flags & ISLASTCN)) 886 cnp->cn_flags |= SAVENAME; 887 if ((cnp->cn_flags & MAKEENTRY) && 888 (cnp->cn_nameiop != DELETE || !(flags & ISLASTCN))) { 889 np->n_ctime = np->n_vattr->va_ctime.tv_sec; 890 cache_enter(dvp, newvp, cnp); 891 } 892 *vpp = newvp; 893 nfsm_reqdone; 894 if (error) { 895 if (error == ENOENT && (cnp->cn_flags & MAKEENTRY) && 896 cnp->cn_nameiop != CREATE) { 897 if (VTONFS(dvp)->n_nctime == 0) 898 VTONFS(dvp)->n_nctime = 899 VTONFS(dvp)->n_vattr->va_mtime.tv_sec; 900 cache_enter(dvp, NULL, cnp); 901 } 902 if (newvp != NULLVP) 903 vrele(newvp); 904 if ((cnp->cn_nameiop == CREATE || cnp->cn_nameiop == RENAME) && 905 (flags & ISLASTCN) && error == ENOENT) { 906 if (dvp->v_mount->mnt_flag & MNT_RDONLY) 907 error = EROFS; 908 else 909 error = EJUSTRETURN; 910 } 911 if (cnp->cn_nameiop != LOOKUP && (flags & ISLASTCN)) 912 cnp->cn_flags |= SAVENAME; 913 } 914 return (error); 915 } 916 917 /* 918 * nfs read call. 919 * Just call nfs_bioread() to do the work. 920 */ 921 int 922 nfs_read(v) 923 void *v; 924 { 925 struct vop_read_args /* { 926 struct vnode *a_vp; 927 struct uio *a_uio; 928 int a_ioflag; 929 struct ucred *a_cred; 930 } */ *ap = v; 931 register struct vnode *vp = ap->a_vp; 932 933 if (vp->v_type != VREG) 934 return (EPERM); 935 return (nfs_bioread(vp, ap->a_uio, ap->a_ioflag, ap->a_cred, 0)); 936 } 937 938 /* 939 * nfs readlink call 940 */ 941 int 942 nfs_readlink(v) 943 void *v; 944 { 945 struct vop_readlink_args /* { 946 struct vnode *a_vp; 947 struct uio *a_uio; 948 struct ucred *a_cred; 949 } */ *ap = v; 950 register struct vnode *vp = ap->a_vp; 951 952 if (vp->v_type != VLNK) 953 return (EPERM); 954 return (nfs_bioread(vp, ap->a_uio, 0, ap->a_cred, 0)); 955 } 956 957 /* 958 * Do a readlink rpc. 959 * Called by nfs_doio() from below the buffer cache. 960 */ 961 int 962 nfs_readlinkrpc(vp, uiop, cred) 963 register struct vnode *vp; 964 struct uio *uiop; 965 struct ucred *cred; 966 { 967 register u_int32_t *tl; 968 register caddr_t cp; 969 register int32_t t1, t2; 970 caddr_t bpos, dpos, cp2; 971 int error = 0, len, attrflag; 972 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 973 int v3 = NFS_ISV3(vp); 974 975 nfsstats.rpccnt[NFSPROC_READLINK]++; 976 nfsm_reqhead(vp, NFSPROC_READLINK, NFSX_FH(v3)); 977 nfsm_fhtom(vp, v3); 978 nfsm_request(vp, NFSPROC_READLINK, uiop->uio_procp, cred); 979 if (v3) 980 nfsm_postop_attr(vp, attrflag); 981 if (!error) { 982 nfsm_strsiz(len, NFS_MAXPATHLEN); 983 nfsm_mtouio(uiop, len); 984 } 985 nfsm_reqdone; 986 return (error); 987 } 988 989 /* 990 * nfs read rpc call 991 * Ditto above 992 */ 993 int 994 nfs_readrpc(vp, uiop, cred) 995 register struct vnode *vp; 996 struct uio *uiop; 997 struct ucred *cred; 998 { 999 register u_int32_t *tl; 1000 register caddr_t cp; 1001 register int32_t t1, t2; 1002 caddr_t bpos, dpos, cp2; 1003 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 1004 struct nfsmount *nmp; 1005 int error = 0, len, retlen, tsiz, eof, attrflag; 1006 int v3 = NFS_ISV3(vp); 1007 1008 #ifndef nolint 1009 eof = 0; 1010 #endif 1011 nmp = VFSTONFS(vp->v_mount); 1012 tsiz = uiop->uio_resid; 1013 if (uiop->uio_offset + tsiz > nmp->nm_maxfilesize) 1014 return (EFBIG); 1015 while (tsiz > 0) { 1016 nfsstats.rpccnt[NFSPROC_READ]++; 1017 len = (tsiz > nmp->nm_rsize) ? nmp->nm_rsize : tsiz; 1018 nfsm_reqhead(vp, NFSPROC_READ, NFSX_FH(v3) + NFSX_UNSIGNED * 3); 1019 nfsm_fhtom(vp, v3); 1020 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED * 3); 1021 if (v3) { 1022 txdr_hyper(uiop->uio_offset, tl); 1023 *(tl + 2) = txdr_unsigned(len); 1024 } else { 1025 *tl++ = txdr_unsigned(uiop->uio_offset); 1026 *tl++ = txdr_unsigned(len); 1027 *tl = 0; 1028 } 1029 nfsm_request(vp, NFSPROC_READ, uiop->uio_procp, cred); 1030 if (v3) { 1031 nfsm_postop_attr(vp, attrflag); 1032 if (error) { 1033 m_freem(mrep); 1034 goto nfsmout; 1035 } 1036 nfsm_dissect(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 1037 eof = fxdr_unsigned(int, *(tl + 1)); 1038 } else 1039 nfsm_loadattr(vp, (struct vattr *)0); 1040 nfsm_strsiz(retlen, nmp->nm_rsize); 1041 nfsm_mtouio(uiop, retlen); 1042 m_freem(mrep); 1043 tsiz -= retlen; 1044 if (v3) { 1045 if (eof || retlen == 0) 1046 tsiz = 0; 1047 } else if (retlen < len) 1048 tsiz = 0; 1049 } 1050 nfsmout: 1051 return (error); 1052 } 1053 1054 /* 1055 * nfs write call 1056 */ 1057 int 1058 nfs_writerpc(vp, uiop, cred, iomode, must_commit) 1059 register struct vnode *vp; 1060 register struct uio *uiop; 1061 struct ucred *cred; 1062 int *iomode, *must_commit; 1063 { 1064 register u_int32_t *tl; 1065 register caddr_t cp; 1066 register int32_t t1, t2, backup; 1067 caddr_t bpos, dpos, cp2; 1068 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 1069 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 1070 int error = 0, len, tsiz, wccflag = NFSV3_WCCRATTR, rlen, commit; 1071 int v3 = NFS_ISV3(vp), committed = NFSV3WRITE_FILESYNC; 1072 1073 #ifndef DIAGNOSTIC 1074 if (uiop->uio_iovcnt != 1) 1075 panic("nfs: writerpc iovcnt > 1"); 1076 #endif 1077 *must_commit = 0; 1078 tsiz = uiop->uio_resid; 1079 if (uiop->uio_offset + tsiz > nmp->nm_maxfilesize) 1080 return (EFBIG); 1081 while (tsiz > 0) { 1082 nfsstats.rpccnt[NFSPROC_WRITE]++; 1083 len = (tsiz > nmp->nm_wsize) ? nmp->nm_wsize : tsiz; 1084 nfsm_reqhead(vp, NFSPROC_WRITE, 1085 NFSX_FH(v3) + 5 * NFSX_UNSIGNED + nfsm_rndup(len)); 1086 nfsm_fhtom(vp, v3); 1087 if (v3) { 1088 nfsm_build(tl, u_int32_t *, 5 * NFSX_UNSIGNED); 1089 txdr_hyper(uiop->uio_offset, tl); 1090 tl += 2; 1091 *tl++ = txdr_unsigned(len); 1092 *tl++ = txdr_unsigned(*iomode); 1093 *tl = txdr_unsigned(len); 1094 } else { 1095 register u_int32_t x; 1096 1097 nfsm_build(tl, u_int32_t *, 4 * NFSX_UNSIGNED); 1098 /* Set both "begin" and "current" to non-garbage. */ 1099 x = txdr_unsigned((u_int32_t)uiop->uio_offset); 1100 *tl++ = x; /* "begin offset" */ 1101 *tl++ = x; /* "current offset" */ 1102 x = txdr_unsigned(len); 1103 *tl++ = x; /* total to this offset */ 1104 *tl = x; /* size of this write */ 1105 1106 } 1107 nfsm_uiotom(uiop, len); 1108 nfsm_request(vp, NFSPROC_WRITE, uiop->uio_procp, cred); 1109 if (v3) { 1110 wccflag = NFSV3_WCCCHK; 1111 nfsm_wcc_data(vp, wccflag); 1112 if (!error) { 1113 nfsm_dissect(tl, u_int32_t *, 2 * NFSX_UNSIGNED 1114 + NFSX_V3WRITEVERF); 1115 rlen = fxdr_unsigned(int, *tl++); 1116 if (rlen == 0) { 1117 error = NFSERR_IO; 1118 m_freem(mrep); 1119 break; 1120 } else if (rlen < len) { 1121 backup = len - rlen; 1122 (caddr_t)uiop->uio_iov->iov_base -= 1123 backup; 1124 uiop->uio_iov->iov_len += backup; 1125 uiop->uio_offset -= backup; 1126 uiop->uio_resid += backup; 1127 len = rlen; 1128 } 1129 commit = fxdr_unsigned(int, *tl++); 1130 1131 /* 1132 * Return the lowest committment level 1133 * obtained by any of the RPCs. 1134 */ 1135 if (committed == NFSV3WRITE_FILESYNC) 1136 committed = commit; 1137 else if (committed == NFSV3WRITE_DATASYNC && 1138 commit == NFSV3WRITE_UNSTABLE) 1139 committed = commit; 1140 if ((nmp->nm_iflag & NFSMNT_HASWRITEVERF) == 0){ 1141 memcpy((caddr_t)nmp->nm_verf, (caddr_t)tl, 1142 NFSX_V3WRITEVERF); 1143 nmp->nm_iflag |= NFSMNT_HASWRITEVERF; 1144 } else if (memcmp((caddr_t)tl, 1145 (caddr_t)nmp->nm_verf, NFSX_V3WRITEVERF)) { 1146 *must_commit = 1; 1147 memcpy((caddr_t)nmp->nm_verf, (caddr_t)tl, 1148 NFSX_V3WRITEVERF); 1149 } 1150 } 1151 } else 1152 nfsm_loadattr(vp, (struct vattr *)0); 1153 if (wccflag) 1154 VTONFS(vp)->n_mtime = VTONFS(vp)->n_vattr->va_mtime.tv_sec; 1155 m_freem(mrep); 1156 if (error) 1157 break; 1158 tsiz -= len; 1159 } 1160 nfsmout: 1161 *iomode = committed; 1162 if (error) 1163 uiop->uio_resid = tsiz; 1164 return (error); 1165 } 1166 1167 /* 1168 * nfs mknod rpc 1169 * For NFS v2 this is a kludge. Use a create rpc but with the IFMT bits of the 1170 * mode set to specify the file type and the size field for rdev. 1171 */ 1172 int 1173 nfs_mknodrpc(dvp, vpp, cnp, vap) 1174 register struct vnode *dvp; 1175 register struct vnode **vpp; 1176 register struct componentname *cnp; 1177 register struct vattr *vap; 1178 { 1179 register struct nfsv2_sattr *sp; 1180 register u_int32_t *tl; 1181 register caddr_t cp; 1182 register int32_t t1, t2; 1183 struct vnode *newvp = (struct vnode *)0; 1184 struct nfsnode *np; 1185 char *cp2; 1186 caddr_t bpos, dpos; 1187 int error = 0, wccflag = NFSV3_WCCRATTR, gotvp = 0; 1188 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 1189 u_int32_t rdev; 1190 int v3 = NFS_ISV3(dvp); 1191 1192 if (vap->va_type == VCHR || vap->va_type == VBLK) 1193 rdev = txdr_unsigned(vap->va_rdev); 1194 else if (vap->va_type == VFIFO || vap->va_type == VSOCK) 1195 rdev = nfs_xdrneg1; 1196 else { 1197 VOP_ABORTOP(dvp, cnp); 1198 vput(dvp); 1199 return (EOPNOTSUPP); 1200 } 1201 nfsstats.rpccnt[NFSPROC_MKNOD]++; 1202 nfsm_reqhead(dvp, NFSPROC_MKNOD, NFSX_FH(v3) + 4 * NFSX_UNSIGNED + 1203 + nfsm_rndup(cnp->cn_namelen) + NFSX_SATTR(v3)); 1204 nfsm_fhtom(dvp, v3); 1205 nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN); 1206 if (v3) { 1207 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); 1208 *tl++ = vtonfsv3_type(vap->va_type); 1209 nfsm_v3attrbuild(vap, FALSE); 1210 if (vap->va_type == VCHR || vap->va_type == VBLK) { 1211 nfsm_build(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 1212 *tl++ = txdr_unsigned(major(vap->va_rdev)); 1213 *tl = txdr_unsigned(minor(vap->va_rdev)); 1214 } 1215 } else { 1216 nfsm_build(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 1217 sp->sa_mode = vtonfsv2_mode(vap->va_type, vap->va_mode); 1218 sp->sa_uid = nfs_xdrneg1; 1219 sp->sa_gid = nfs_xdrneg1; 1220 sp->sa_size = rdev; 1221 txdr_nfsv2time(&vap->va_atime, &sp->sa_atime); 1222 txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime); 1223 } 1224 nfsm_request(dvp, NFSPROC_MKNOD, cnp->cn_proc, cnp->cn_cred); 1225 if (!error) { 1226 nfsm_mtofh(dvp, newvp, v3, gotvp); 1227 if (!gotvp) { 1228 if (newvp) { 1229 vrele(newvp); 1230 newvp = (struct vnode *)0; 1231 } 1232 error = nfs_lookitup(dvp, cnp->cn_nameptr, 1233 cnp->cn_namelen, cnp->cn_cred, cnp->cn_proc, &np); 1234 if (!error) 1235 newvp = NFSTOV(np); 1236 } 1237 } 1238 if (v3) 1239 nfsm_wcc_data(dvp, wccflag); 1240 nfsm_reqdone; 1241 if (error) { 1242 if (newvp) 1243 vrele(newvp); 1244 } else { 1245 if (cnp->cn_flags & MAKEENTRY) 1246 cache_enter(dvp, newvp, cnp); 1247 *vpp = newvp; 1248 } 1249 FREE(cnp->cn_pnbuf, M_NAMEI); 1250 VTONFS(dvp)->n_flag |= NMODIFIED; 1251 if (!wccflag) 1252 VTONFS(dvp)->n_attrstamp = 0; 1253 vrele(dvp); 1254 return (error); 1255 } 1256 1257 /* 1258 * nfs mknod vop 1259 * just call nfs_mknodrpc() to do the work. 1260 */ 1261 /* ARGSUSED */ 1262 int 1263 nfs_mknod(v) 1264 void *v; 1265 { 1266 struct vop_mknod_args /* { 1267 struct vnode *a_dvp; 1268 struct vnode **a_vpp; 1269 struct componentname *a_cnp; 1270 struct vattr *a_vap; 1271 } */ *ap = v; 1272 struct vnode *newvp; 1273 int error; 1274 1275 error = nfs_mknodrpc(ap->a_dvp, &newvp, ap->a_cnp, ap->a_vap); 1276 if (!error) 1277 vrele(newvp); 1278 return (error); 1279 } 1280 1281 static u_long create_verf; 1282 /* 1283 * nfs file create call 1284 */ 1285 int 1286 nfs_create(v) 1287 void *v; 1288 { 1289 struct vop_create_args /* { 1290 struct vnode *a_dvp; 1291 struct vnode **a_vpp; 1292 struct componentname *a_cnp; 1293 struct vattr *a_vap; 1294 } */ *ap = v; 1295 register struct vnode *dvp = ap->a_dvp; 1296 register struct vattr *vap = ap->a_vap; 1297 register struct componentname *cnp = ap->a_cnp; 1298 register struct nfsv2_sattr *sp; 1299 register u_int32_t *tl; 1300 register caddr_t cp; 1301 register int32_t t1, t2; 1302 struct nfsnode *np = (struct nfsnode *)0; 1303 struct vnode *newvp = (struct vnode *)0; 1304 caddr_t bpos, dpos, cp2; 1305 int error = 0, wccflag = NFSV3_WCCRATTR, gotvp = 0, fmode = 0; 1306 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 1307 int v3 = NFS_ISV3(dvp); 1308 1309 /* 1310 * Oops, not for me.. 1311 */ 1312 if (vap->va_type == VSOCK) 1313 return (nfs_mknodrpc(dvp, ap->a_vpp, cnp, vap)); 1314 1315 #ifdef VA_EXCLUSIVE 1316 if (vap->va_vaflags & VA_EXCLUSIVE) 1317 fmode |= O_EXCL; 1318 #endif 1319 again: 1320 nfsstats.rpccnt[NFSPROC_CREATE]++; 1321 nfsm_reqhead(dvp, NFSPROC_CREATE, NFSX_FH(v3) + 2 * NFSX_UNSIGNED + 1322 nfsm_rndup(cnp->cn_namelen) + NFSX_SATTR(v3)); 1323 nfsm_fhtom(dvp, v3); 1324 nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN); 1325 if (v3) { 1326 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); 1327 if (fmode & O_EXCL) { 1328 *tl = txdr_unsigned(NFSV3CREATE_EXCLUSIVE); 1329 nfsm_build(tl, u_int32_t *, NFSX_V3CREATEVERF); 1330 if (in_ifaddr.tqh_first) 1331 *tl++ = in_ifaddr.tqh_first->ia_addr.sin_addr.s_addr; 1332 else 1333 *tl++ = create_verf; 1334 *tl = ++create_verf; 1335 } else { 1336 *tl = txdr_unsigned(NFSV3CREATE_UNCHECKED); 1337 nfsm_v3attrbuild(vap, FALSE); 1338 } 1339 } else { 1340 nfsm_build(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 1341 sp->sa_mode = vtonfsv2_mode(vap->va_type, vap->va_mode); 1342 sp->sa_uid = nfs_xdrneg1; 1343 sp->sa_gid = nfs_xdrneg1; 1344 sp->sa_size = 0; 1345 txdr_nfsv2time(&vap->va_atime, &sp->sa_atime); 1346 txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime); 1347 } 1348 nfsm_request(dvp, NFSPROC_CREATE, cnp->cn_proc, cnp->cn_cred); 1349 if (!error) { 1350 nfsm_mtofh(dvp, newvp, v3, gotvp); 1351 if (!gotvp) { 1352 if (newvp) { 1353 vrele(newvp); 1354 newvp = (struct vnode *)0; 1355 } 1356 error = nfs_lookitup(dvp, cnp->cn_nameptr, 1357 cnp->cn_namelen, cnp->cn_cred, cnp->cn_proc, &np); 1358 if (!error) 1359 newvp = NFSTOV(np); 1360 } 1361 } 1362 if (v3) 1363 nfsm_wcc_data(dvp, wccflag); 1364 nfsm_reqdone; 1365 if (error) { 1366 if (v3 && (fmode & O_EXCL) && error == NFSERR_NOTSUPP) { 1367 fmode &= ~O_EXCL; 1368 goto again; 1369 } 1370 if (newvp) 1371 vrele(newvp); 1372 } else if (v3 && (fmode & O_EXCL)) 1373 error = nfs_setattrrpc(newvp, vap, cnp->cn_cred, cnp->cn_proc); 1374 if (!error) { 1375 if (cnp->cn_flags & MAKEENTRY) 1376 cache_enter(dvp, newvp, cnp); 1377 *ap->a_vpp = newvp; 1378 } 1379 FREE(cnp->cn_pnbuf, M_NAMEI); 1380 VTONFS(dvp)->n_flag |= NMODIFIED; 1381 if (!wccflag) 1382 VTONFS(dvp)->n_attrstamp = 0; 1383 vrele(dvp); 1384 return (error); 1385 } 1386 1387 /* 1388 * nfs file remove call 1389 * To try and make nfs semantics closer to ufs semantics, a file that has 1390 * other processes using the vnode is renamed instead of removed and then 1391 * removed later on the last close. 1392 * - If v_usecount > 1 1393 * If a rename is not already in the works 1394 * call nfs_sillyrename() to set it up 1395 * else 1396 * do the remove rpc 1397 */ 1398 int 1399 nfs_remove(v) 1400 void *v; 1401 { 1402 struct vop_remove_args /* { 1403 struct vnodeop_desc *a_desc; 1404 struct vnode * a_dvp; 1405 struct vnode * a_vp; 1406 struct componentname * a_cnp; 1407 } */ *ap = v; 1408 register struct vnode *vp = ap->a_vp; 1409 register struct vnode *dvp = ap->a_dvp; 1410 register struct componentname *cnp = ap->a_cnp; 1411 register struct nfsnode *np = VTONFS(vp); 1412 int error = 0; 1413 struct vattr vattr; 1414 1415 #ifndef DIAGNOSTIC 1416 if ((cnp->cn_flags & HASBUF) == 0) 1417 panic("nfs_remove: no name"); 1418 if (vp->v_usecount < 1) 1419 panic("nfs_remove: bad v_usecount"); 1420 #endif 1421 if (vp->v_type == VDIR) 1422 error = EPERM; 1423 else if (vp->v_usecount == 1 || (np->n_sillyrename && 1424 VOP_GETATTR(vp, &vattr, cnp->cn_cred, cnp->cn_proc) == 0 && 1425 vattr.va_nlink > 1)) { 1426 /* 1427 * Purge the name cache so that the chance of a lookup for 1428 * the name succeeding while the remove is in progress is 1429 * minimized. Without node locking it can still happen, such 1430 * that an I/O op returns ESTALE, but since you get this if 1431 * another host removes the file.. 1432 */ 1433 cache_purge(vp); 1434 /* 1435 * throw away biocache buffers, mainly to avoid 1436 * unnecessary delayed writes later. 1437 */ 1438 error = nfs_vinvalbuf(vp, 0, cnp->cn_cred, cnp->cn_proc, 1); 1439 /* Do the rpc */ 1440 if (error != EINTR) 1441 error = nfs_removerpc(dvp, cnp->cn_nameptr, 1442 cnp->cn_namelen, cnp->cn_cred, cnp->cn_proc); 1443 /* 1444 * Kludge City: If the first reply to the remove rpc is lost.. 1445 * the reply to the retransmitted request will be ENOENT 1446 * since the file was in fact removed 1447 * Therefore, we cheat and return success. 1448 */ 1449 if (error == ENOENT) 1450 error = 0; 1451 } else if (!np->n_sillyrename) 1452 error = nfs_sillyrename(dvp, vp, cnp); 1453 FREE(cnp->cn_pnbuf, M_NAMEI); 1454 np->n_attrstamp = 0; 1455 vrele(dvp); 1456 vrele(vp); 1457 return (error); 1458 } 1459 1460 /* 1461 * nfs file remove rpc called from nfs_inactive 1462 */ 1463 int 1464 nfs_removeit(sp) 1465 register struct sillyrename *sp; 1466 { 1467 1468 return (nfs_removerpc(sp->s_dvp, sp->s_name, sp->s_namlen, sp->s_cred, 1469 (struct proc *)0)); 1470 } 1471 1472 /* 1473 * Nfs remove rpc, called from nfs_remove() and nfs_removeit(). 1474 */ 1475 int 1476 nfs_removerpc(dvp, name, namelen, cred, proc) 1477 register struct vnode *dvp; 1478 const char *name; 1479 int namelen; 1480 struct ucred *cred; 1481 struct proc *proc; 1482 { 1483 register u_int32_t *tl; 1484 register caddr_t cp; 1485 register int32_t t1, t2; 1486 caddr_t bpos, dpos, cp2; 1487 int error = 0, wccflag = NFSV3_WCCRATTR; 1488 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 1489 int v3 = NFS_ISV3(dvp); 1490 1491 nfsstats.rpccnt[NFSPROC_REMOVE]++; 1492 nfsm_reqhead(dvp, NFSPROC_REMOVE, 1493 NFSX_FH(v3) + NFSX_UNSIGNED + nfsm_rndup(namelen)); 1494 nfsm_fhtom(dvp, v3); 1495 nfsm_strtom(name, namelen, NFS_MAXNAMLEN); 1496 nfsm_request(dvp, NFSPROC_REMOVE, proc, cred); 1497 if (v3) 1498 nfsm_wcc_data(dvp, wccflag); 1499 nfsm_reqdone; 1500 VTONFS(dvp)->n_flag |= NMODIFIED; 1501 if (!wccflag) 1502 VTONFS(dvp)->n_attrstamp = 0; 1503 return (error); 1504 } 1505 1506 /* 1507 * nfs file rename call 1508 */ 1509 int 1510 nfs_rename(v) 1511 void *v; 1512 { 1513 struct vop_rename_args /* { 1514 struct vnode *a_fdvp; 1515 struct vnode *a_fvp; 1516 struct componentname *a_fcnp; 1517 struct vnode *a_tdvp; 1518 struct vnode *a_tvp; 1519 struct componentname *a_tcnp; 1520 } */ *ap = v; 1521 register struct vnode *fvp = ap->a_fvp; 1522 register struct vnode *tvp = ap->a_tvp; 1523 register struct vnode *fdvp = ap->a_fdvp; 1524 register struct vnode *tdvp = ap->a_tdvp; 1525 register struct componentname *tcnp = ap->a_tcnp; 1526 register struct componentname *fcnp = ap->a_fcnp; 1527 int error; 1528 1529 #ifndef DIAGNOSTIC 1530 if ((tcnp->cn_flags & HASBUF) == 0 || 1531 (fcnp->cn_flags & HASBUF) == 0) 1532 panic("nfs_rename: no name"); 1533 #endif 1534 /* Check for cross-device rename */ 1535 if ((fvp->v_mount != tdvp->v_mount) || 1536 (tvp && (fvp->v_mount != tvp->v_mount))) { 1537 error = EXDEV; 1538 goto out; 1539 } 1540 1541 /* 1542 * If the tvp exists and is in use, sillyrename it before doing the 1543 * rename of the new file over it. 1544 */ 1545 if (tvp && tvp->v_usecount > 1 && !VTONFS(tvp)->n_sillyrename && 1546 tvp->v_type != VDIR && !nfs_sillyrename(tdvp, tvp, tcnp)) { 1547 vrele(tvp); 1548 tvp = NULL; 1549 } 1550 1551 error = nfs_renamerpc(fdvp, fcnp->cn_nameptr, fcnp->cn_namelen, 1552 tdvp, tcnp->cn_nameptr, tcnp->cn_namelen, tcnp->cn_cred, 1553 tcnp->cn_proc); 1554 1555 if (fvp->v_type == VDIR) { 1556 if (tvp != NULL && tvp->v_type == VDIR) 1557 cache_purge(tdvp); 1558 cache_purge(fdvp); 1559 } 1560 out: 1561 if (tdvp == tvp) 1562 vrele(tdvp); 1563 else 1564 vput(tdvp); 1565 if (tvp) 1566 vput(tvp); 1567 vrele(fdvp); 1568 vrele(fvp); 1569 /* 1570 * Kludge: Map ENOENT => 0 assuming that it is a reply to a retry. 1571 */ 1572 if (error == ENOENT) 1573 error = 0; 1574 return (error); 1575 } 1576 1577 /* 1578 * nfs file rename rpc called from nfs_remove() above 1579 */ 1580 int 1581 nfs_renameit(sdvp, scnp, sp) 1582 struct vnode *sdvp; 1583 struct componentname *scnp; 1584 register struct sillyrename *sp; 1585 { 1586 return (nfs_renamerpc(sdvp, scnp->cn_nameptr, scnp->cn_namelen, 1587 sdvp, sp->s_name, sp->s_namlen, scnp->cn_cred, scnp->cn_proc)); 1588 } 1589 1590 /* 1591 * Do an nfs rename rpc. Called from nfs_rename() and nfs_renameit(). 1592 */ 1593 int 1594 nfs_renamerpc(fdvp, fnameptr, fnamelen, tdvp, tnameptr, tnamelen, cred, proc) 1595 register struct vnode *fdvp; 1596 const char *fnameptr; 1597 int fnamelen; 1598 register struct vnode *tdvp; 1599 const char *tnameptr; 1600 int tnamelen; 1601 struct ucred *cred; 1602 struct proc *proc; 1603 { 1604 register u_int32_t *tl; 1605 register caddr_t cp; 1606 register int32_t t1, t2; 1607 caddr_t bpos, dpos, cp2; 1608 int error = 0, fwccflag = NFSV3_WCCRATTR, twccflag = NFSV3_WCCRATTR; 1609 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 1610 int v3 = NFS_ISV3(fdvp); 1611 1612 nfsstats.rpccnt[NFSPROC_RENAME]++; 1613 nfsm_reqhead(fdvp, NFSPROC_RENAME, 1614 (NFSX_FH(v3) + NFSX_UNSIGNED)*2 + nfsm_rndup(fnamelen) + 1615 nfsm_rndup(tnamelen)); 1616 nfsm_fhtom(fdvp, v3); 1617 nfsm_strtom(fnameptr, fnamelen, NFS_MAXNAMLEN); 1618 nfsm_fhtom(tdvp, v3); 1619 nfsm_strtom(tnameptr, tnamelen, NFS_MAXNAMLEN); 1620 nfsm_request(fdvp, NFSPROC_RENAME, proc, cred); 1621 if (v3) { 1622 nfsm_wcc_data(fdvp, fwccflag); 1623 nfsm_wcc_data(tdvp, twccflag); 1624 } 1625 nfsm_reqdone; 1626 VTONFS(fdvp)->n_flag |= NMODIFIED; 1627 VTONFS(tdvp)->n_flag |= NMODIFIED; 1628 if (!fwccflag) 1629 VTONFS(fdvp)->n_attrstamp = 0; 1630 if (!twccflag) 1631 VTONFS(tdvp)->n_attrstamp = 0; 1632 return (error); 1633 } 1634 1635 /* 1636 * nfs hard link create call 1637 */ 1638 int 1639 nfs_link(v) 1640 void *v; 1641 { 1642 struct vop_link_args /* { 1643 struct vnode *a_dvp; 1644 struct vnode *a_vp; 1645 struct componentname *a_cnp; 1646 } */ *ap = v; 1647 register struct vnode *vp = ap->a_vp; 1648 register struct vnode *dvp = ap->a_dvp; 1649 register struct componentname *cnp = ap->a_cnp; 1650 register u_int32_t *tl; 1651 register caddr_t cp; 1652 register int32_t t1, t2; 1653 caddr_t bpos, dpos, cp2; 1654 int error = 0, wccflag = NFSV3_WCCRATTR, attrflag = 0; 1655 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 1656 int v3; 1657 1658 if (dvp->v_mount != vp->v_mount) { 1659 VOP_ABORTOP(vp, cnp); 1660 vput(dvp); 1661 return (EXDEV); 1662 } 1663 1664 /* 1665 * Push all writes to the server, so that the attribute cache 1666 * doesn't get "out of sync" with the server. 1667 * XXX There should be a better way! 1668 */ 1669 VOP_FSYNC(vp, cnp->cn_cred, FSYNC_WAIT, cnp->cn_proc); 1670 1671 v3 = NFS_ISV3(vp); 1672 nfsstats.rpccnt[NFSPROC_LINK]++; 1673 nfsm_reqhead(vp, NFSPROC_LINK, 1674 NFSX_FH(v3)*2 + NFSX_UNSIGNED + nfsm_rndup(cnp->cn_namelen)); 1675 nfsm_fhtom(vp, v3); 1676 nfsm_fhtom(dvp, v3); 1677 nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN); 1678 nfsm_request(vp, NFSPROC_LINK, cnp->cn_proc, cnp->cn_cred); 1679 if (v3) { 1680 nfsm_postop_attr(vp, attrflag); 1681 nfsm_wcc_data(dvp, wccflag); 1682 } 1683 nfsm_reqdone; 1684 FREE(cnp->cn_pnbuf, M_NAMEI); 1685 VTONFS(dvp)->n_flag |= NMODIFIED; 1686 if (!attrflag) 1687 VTONFS(vp)->n_attrstamp = 0; 1688 if (!wccflag) 1689 VTONFS(dvp)->n_attrstamp = 0; 1690 vput(dvp); 1691 /* 1692 * Kludge: Map EEXIST => 0 assuming that it is a reply to a retry. 1693 */ 1694 if (error == EEXIST) 1695 error = 0; 1696 return (error); 1697 } 1698 1699 /* 1700 * nfs symbolic link create call 1701 */ 1702 int 1703 nfs_symlink(v) 1704 void *v; 1705 { 1706 struct vop_symlink_args /* { 1707 struct vnode *a_dvp; 1708 struct vnode **a_vpp; 1709 struct componentname *a_cnp; 1710 struct vattr *a_vap; 1711 char *a_target; 1712 } */ *ap = v; 1713 register struct vnode *dvp = ap->a_dvp; 1714 register struct vattr *vap = ap->a_vap; 1715 register struct componentname *cnp = ap->a_cnp; 1716 register struct nfsv2_sattr *sp; 1717 register u_int32_t *tl; 1718 register caddr_t cp; 1719 register int32_t t1, t2; 1720 caddr_t bpos, dpos, cp2; 1721 int slen, error = 0, wccflag = NFSV3_WCCRATTR, gotvp; 1722 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 1723 struct vnode *newvp = (struct vnode *)0; 1724 int v3 = NFS_ISV3(dvp); 1725 1726 nfsstats.rpccnt[NFSPROC_SYMLINK]++; 1727 slen = strlen(ap->a_target); 1728 nfsm_reqhead(dvp, NFSPROC_SYMLINK, NFSX_FH(v3) + 2*NFSX_UNSIGNED + 1729 nfsm_rndup(cnp->cn_namelen) + nfsm_rndup(slen) + NFSX_SATTR(v3)); 1730 nfsm_fhtom(dvp, v3); 1731 nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN); 1732 if (v3) 1733 nfsm_v3attrbuild(vap, FALSE); 1734 nfsm_strtom(ap->a_target, slen, NFS_MAXPATHLEN); 1735 if (!v3) { 1736 nfsm_build(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 1737 sp->sa_mode = vtonfsv2_mode(VLNK, vap->va_mode); 1738 sp->sa_uid = nfs_xdrneg1; 1739 sp->sa_gid = nfs_xdrneg1; 1740 sp->sa_size = nfs_xdrneg1; 1741 txdr_nfsv2time(&vap->va_atime, &sp->sa_atime); 1742 txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime); 1743 } 1744 nfsm_request(dvp, NFSPROC_SYMLINK, cnp->cn_proc, cnp->cn_cred); 1745 if (v3) { 1746 if (!error) 1747 nfsm_mtofh(dvp, newvp, v3, gotvp); 1748 nfsm_wcc_data(dvp, wccflag); 1749 } 1750 nfsm_reqdone; 1751 if (newvp) 1752 vrele(newvp); 1753 FREE(cnp->cn_pnbuf, M_NAMEI); 1754 VTONFS(dvp)->n_flag |= NMODIFIED; 1755 if (!wccflag) 1756 VTONFS(dvp)->n_attrstamp = 0; 1757 vrele(dvp); 1758 /* 1759 * Kludge: Map EEXIST => 0 assuming that it is a reply to a retry. 1760 */ 1761 if (error == EEXIST) 1762 error = 0; 1763 return (error); 1764 } 1765 1766 /* 1767 * nfs make dir call 1768 */ 1769 int 1770 nfs_mkdir(v) 1771 void *v; 1772 { 1773 struct vop_mkdir_args /* { 1774 struct vnode *a_dvp; 1775 struct vnode **a_vpp; 1776 struct componentname *a_cnp; 1777 struct vattr *a_vap; 1778 } */ *ap = v; 1779 register struct vnode *dvp = ap->a_dvp; 1780 register struct vattr *vap = ap->a_vap; 1781 register struct componentname *cnp = ap->a_cnp; 1782 register struct nfsv2_sattr *sp; 1783 register u_int32_t *tl; 1784 register caddr_t cp; 1785 register int32_t t1, t2; 1786 register int len; 1787 struct nfsnode *np = (struct nfsnode *)0; 1788 struct vnode *newvp = (struct vnode *)0; 1789 caddr_t bpos, dpos, cp2; 1790 int error = 0, wccflag = NFSV3_WCCRATTR; 1791 int gotvp = 0; 1792 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 1793 int v3 = NFS_ISV3(dvp); 1794 1795 len = cnp->cn_namelen; 1796 nfsstats.rpccnt[NFSPROC_MKDIR]++; 1797 nfsm_reqhead(dvp, NFSPROC_MKDIR, 1798 NFSX_FH(v3) + NFSX_UNSIGNED + nfsm_rndup(len) + NFSX_SATTR(v3)); 1799 nfsm_fhtom(dvp, v3); 1800 nfsm_strtom(cnp->cn_nameptr, len, NFS_MAXNAMLEN); 1801 if (v3) { 1802 nfsm_v3attrbuild(vap, FALSE); 1803 } else { 1804 nfsm_build(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 1805 sp->sa_mode = vtonfsv2_mode(VDIR, vap->va_mode); 1806 sp->sa_uid = nfs_xdrneg1; 1807 sp->sa_gid = nfs_xdrneg1; 1808 sp->sa_size = nfs_xdrneg1; 1809 txdr_nfsv2time(&vap->va_atime, &sp->sa_atime); 1810 txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime); 1811 } 1812 nfsm_request(dvp, NFSPROC_MKDIR, cnp->cn_proc, cnp->cn_cred); 1813 if (!error) 1814 nfsm_mtofh(dvp, newvp, v3, gotvp); 1815 if (v3) 1816 nfsm_wcc_data(dvp, wccflag); 1817 nfsm_reqdone; 1818 VTONFS(dvp)->n_flag |= NMODIFIED; 1819 if (!wccflag) 1820 VTONFS(dvp)->n_attrstamp = 0; 1821 /* 1822 * Kludge: Map EEXIST => 0 assuming that you have a reply to a retry 1823 * if we can succeed in looking up the directory. 1824 */ 1825 if (error == EEXIST || (!error && !gotvp)) { 1826 if (newvp) { 1827 vrele(newvp); 1828 newvp = (struct vnode *)0; 1829 } 1830 error = nfs_lookitup(dvp, cnp->cn_nameptr, len, cnp->cn_cred, 1831 cnp->cn_proc, &np); 1832 if (!error) { 1833 newvp = NFSTOV(np); 1834 if (newvp->v_type != VDIR) 1835 error = EEXIST; 1836 } 1837 } 1838 if (error) { 1839 if (newvp) 1840 vrele(newvp); 1841 } else { 1842 if (cnp->cn_flags & MAKEENTRY) 1843 cache_enter(dvp, newvp, cnp); 1844 *ap->a_vpp = newvp; 1845 } 1846 FREE(cnp->cn_pnbuf, M_NAMEI); 1847 vrele(dvp); 1848 return (error); 1849 } 1850 1851 /* 1852 * nfs remove directory call 1853 */ 1854 int 1855 nfs_rmdir(v) 1856 void *v; 1857 { 1858 struct vop_rmdir_args /* { 1859 struct vnode *a_dvp; 1860 struct vnode *a_vp; 1861 struct componentname *a_cnp; 1862 } */ *ap = v; 1863 register struct vnode *vp = ap->a_vp; 1864 register struct vnode *dvp = ap->a_dvp; 1865 register struct componentname *cnp = ap->a_cnp; 1866 register u_int32_t *tl; 1867 register caddr_t cp; 1868 register int32_t t1, t2; 1869 caddr_t bpos, dpos, cp2; 1870 int error = 0, wccflag = NFSV3_WCCRATTR; 1871 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 1872 int v3 = NFS_ISV3(dvp); 1873 1874 if (dvp == vp) { 1875 vrele(dvp); 1876 vrele(dvp); 1877 FREE(cnp->cn_pnbuf, M_NAMEI); 1878 return (EINVAL); 1879 } 1880 nfsstats.rpccnt[NFSPROC_RMDIR]++; 1881 nfsm_reqhead(dvp, NFSPROC_RMDIR, 1882 NFSX_FH(v3) + NFSX_UNSIGNED + nfsm_rndup(cnp->cn_namelen)); 1883 nfsm_fhtom(dvp, v3); 1884 nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN); 1885 nfsm_request(dvp, NFSPROC_RMDIR, cnp->cn_proc, cnp->cn_cred); 1886 if (v3) 1887 nfsm_wcc_data(dvp, wccflag); 1888 nfsm_reqdone; 1889 FREE(cnp->cn_pnbuf, M_NAMEI); 1890 VTONFS(dvp)->n_flag |= NMODIFIED; 1891 if (!wccflag) 1892 VTONFS(dvp)->n_attrstamp = 0; 1893 cache_purge(dvp); 1894 cache_purge(vp); 1895 vrele(vp); 1896 vrele(dvp); 1897 /* 1898 * Kludge: Map ENOENT => 0 assuming that you have a reply to a retry. 1899 */ 1900 if (error == ENOENT) 1901 error = 0; 1902 return (error); 1903 } 1904 1905 /* 1906 * nfs readdir call 1907 */ 1908 int 1909 nfs_readdir(v) 1910 void *v; 1911 { 1912 struct vop_readdir_args /* { 1913 struct vnode *a_vp; 1914 struct uio *a_uio; 1915 struct ucred *a_cred; 1916 int *a_eofflag; 1917 off_t **a_cookies; 1918 int *a_ncookies; 1919 } */ *ap = v; 1920 register struct vnode *vp = ap->a_vp; 1921 register struct uio *uio = ap->a_uio; 1922 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 1923 char *base = uio->uio_iov->iov_base; 1924 int tresid, error; 1925 size_t count, lost; 1926 struct dirent *dp; 1927 off_t *cookies = NULL; 1928 int ncookies = 0, nc; 1929 1930 if (vp->v_type != VDIR) 1931 return (EPERM); 1932 1933 lost = uio->uio_resid & (NFS_DIRFRAGSIZ - 1); 1934 count = uio->uio_resid - lost; 1935 if (count <= 0) 1936 return (EINVAL); 1937 1938 /* 1939 * Call nfs_bioread() to do the real work. 1940 */ 1941 tresid = uio->uio_resid = count; 1942 error = nfs_bioread(vp, uio, 0, ap->a_cred, 1943 ap->a_cookies ? NFSBIO_CACHECOOKIES : 0); 1944 1945 if (!error && ap->a_cookies) { 1946 ncookies = count / 16; 1947 MALLOC(cookies, off_t *, sizeof (off_t) * ncookies, M_TEMP, 1948 M_WAITOK); 1949 *ap->a_cookies = cookies; 1950 } 1951 1952 if (!error && uio->uio_resid == tresid) { 1953 uio->uio_resid += lost; 1954 nfsstats.direofcache_misses++; 1955 if (ap->a_cookies) 1956 *ap->a_ncookies = 0; 1957 *ap->a_eofflag = 1; 1958 return (0); 1959 } 1960 1961 if (!error && ap->a_cookies) { 1962 /* 1963 * Only the NFS server and emulations use cookies, and they 1964 * load the directory block into system space, so we can 1965 * just look at it directly. 1966 */ 1967 if (uio->uio_segflg != UIO_SYSSPACE || uio->uio_iovcnt != 1) 1968 panic("nfs_readdir: lost in space"); 1969 for (nc = 0; ncookies-- && 1970 base < (char *)uio->uio_iov->iov_base; nc++){ 1971 dp = (struct dirent *) base; 1972 if (dp->d_reclen == 0) 1973 break; 1974 if (nmp->nm_flag & NFSMNT_XLATECOOKIE) 1975 *(cookies++) = (off_t)NFS_GETCOOKIE32(dp); 1976 else 1977 *(cookies++) = NFS_GETCOOKIE(dp); 1978 base += dp->d_reclen; 1979 } 1980 uio->uio_resid += 1981 ((caddr_t)uio->uio_iov->iov_base - base); 1982 uio->uio_iov->iov_len += 1983 ((caddr_t)uio->uio_iov->iov_base - base); 1984 uio->uio_iov->iov_base = base; 1985 *ap->a_ncookies = nc; 1986 } 1987 1988 uio->uio_resid += lost; 1989 *ap->a_eofflag = 0; 1990 return (error); 1991 } 1992 1993 /* 1994 * Readdir rpc call. 1995 * Called from below the buffer cache by nfs_doio(). 1996 */ 1997 int 1998 nfs_readdirrpc(vp, uiop, cred) 1999 struct vnode *vp; 2000 register struct uio *uiop; 2001 struct ucred *cred; 2002 { 2003 register int len, left; 2004 register struct dirent *dp = NULL; 2005 register u_int32_t *tl; 2006 register caddr_t cp; 2007 register int32_t t1, t2; 2008 caddr_t bpos, dpos, cp2; 2009 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 2010 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 2011 struct nfsnode *dnp = VTONFS(vp); 2012 u_quad_t fileno; 2013 int error = 0, tlen, more_dirs = 1, blksiz = 0, bigenough = 1; 2014 int attrflag, nrpcs = 0, reclen; 2015 int v3 = NFS_ISV3(vp); 2016 nfsquad_t cookie; 2017 2018 #ifdef DIAGNOSTIC 2019 /* 2020 * Should be called from buffer cache, so only amount of 2021 * NFS_DIRBLKSIZ will be requested. 2022 */ 2023 if (uiop->uio_iovcnt != 1 || (uiop->uio_resid & (NFS_DIRBLKSIZ - 1))) 2024 panic("nfs readdirrpc bad uio"); 2025 #endif 2026 2027 /* 2028 * Loop around doing readdir rpc's of size nm_readdirsize 2029 * truncated to a multiple of NFS_DIRFRAGSIZ. 2030 * The stopping criteria is EOF or buffer full. 2031 */ 2032 while (more_dirs && bigenough) { 2033 /* 2034 * Heuristic: don't bother to do another RPC to further 2035 * fill up this block if there is not much room left. (< 50% 2036 * of the readdir RPC size). This wastes some buffer space 2037 * but can save up to 50% in RPC calls. 2038 */ 2039 if (nrpcs > 0 && uiop->uio_resid < (nmp->nm_readdirsize / 2)) { 2040 bigenough = 0; 2041 break; 2042 } 2043 nfsstats.rpccnt[NFSPROC_READDIR]++; 2044 nfsm_reqhead(vp, NFSPROC_READDIR, NFSX_FH(v3) + 2045 NFSX_READDIR(v3)); 2046 nfsm_fhtom(vp, v3); 2047 if (v3) { 2048 nfsm_build(tl, u_int32_t *, 5 * NFSX_UNSIGNED); 2049 cookie.qval = uiop->uio_offset; 2050 if (nmp->nm_iflag & NFSMNT_SWAPCOOKIE) { 2051 txdr_swapcookie3(uiop->uio_offset, tl); 2052 } else { 2053 txdr_cookie3(uiop->uio_offset, tl); 2054 } 2055 tl += 2; 2056 *tl++ = dnp->n_cookieverf.nfsuquad[0]; 2057 *tl++ = dnp->n_cookieverf.nfsuquad[1]; 2058 } else { 2059 nfsm_build(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 2060 *tl++ = txdr_unsigned(uiop->uio_offset); 2061 } 2062 *tl = txdr_unsigned(nmp->nm_readdirsize); 2063 nfsm_request(vp, NFSPROC_READDIR, uiop->uio_procp, cred); 2064 nrpcs++; 2065 if (v3) { 2066 nfsm_postop_attr(vp, attrflag); 2067 if (!error) { 2068 nfsm_dissect(tl, u_int32_t *, 2069 2 * NFSX_UNSIGNED); 2070 dnp->n_cookieverf.nfsuquad[0] = *tl++; 2071 dnp->n_cookieverf.nfsuquad[1] = *tl; 2072 } else { 2073 m_freem(mrep); 2074 goto nfsmout; 2075 } 2076 } 2077 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 2078 more_dirs = fxdr_unsigned(int, *tl); 2079 2080 /* loop thru the dir entries, doctoring them to 4bsd form */ 2081 while (more_dirs && bigenough) { 2082 if (v3) { 2083 nfsm_dissect(tl, u_int32_t *, 2084 3 * NFSX_UNSIGNED); 2085 fileno = fxdr_hyper(tl); 2086 len = fxdr_unsigned(int, *(tl + 2)); 2087 } else { 2088 nfsm_dissect(tl, u_int32_t *, 2089 2 * NFSX_UNSIGNED); 2090 fileno = fxdr_unsigned(u_quad_t, *tl++); 2091 len = fxdr_unsigned(int, *tl); 2092 } 2093 if (len <= 0 || len > NFS_MAXNAMLEN) { 2094 error = EBADRPC; 2095 m_freem(mrep); 2096 goto nfsmout; 2097 } 2098 tlen = nfsm_rndup(len); 2099 if (tlen == len) 2100 tlen += 4; /* To ensure null termination */ 2101 tlen += sizeof (off_t) + sizeof (int); 2102 reclen = ALIGN(tlen + DIRHDSIZ); 2103 tlen = reclen - DIRHDSIZ; 2104 left = NFS_DIRFRAGSIZ - blksiz; 2105 if (reclen > left) { 2106 dp->d_reclen += left; 2107 (caddr_t)uiop->uio_iov->iov_base += left; 2108 uiop->uio_iov->iov_len -= left; 2109 uiop->uio_resid -= left; 2110 blksiz = 0; 2111 NFS_STASHCOOKIE(dp, uiop->uio_offset); 2112 } 2113 if (reclen > uiop->uio_resid) 2114 bigenough = 0; 2115 if (bigenough) { 2116 dp = (struct dirent *)uiop->uio_iov->iov_base; 2117 dp->d_fileno = (int)fileno; 2118 dp->d_namlen = len; 2119 dp->d_reclen = reclen; 2120 dp->d_type = DT_UNKNOWN; 2121 blksiz += dp->d_reclen; 2122 if (blksiz == NFS_DIRFRAGSIZ) 2123 blksiz = 0; 2124 uiop->uio_resid -= DIRHDSIZ; 2125 (caddr_t)uiop->uio_iov->iov_base += DIRHDSIZ; 2126 uiop->uio_iov->iov_len -= DIRHDSIZ; 2127 nfsm_mtouio(uiop, len); 2128 cp = uiop->uio_iov->iov_base; 2129 tlen -= len; 2130 *cp = '\0'; /* null terminate */ 2131 (caddr_t)uiop->uio_iov->iov_base += tlen; 2132 uiop->uio_iov->iov_len -= tlen; 2133 uiop->uio_resid -= tlen; 2134 } else 2135 nfsm_adv(nfsm_rndup(len)); 2136 if (v3) { 2137 nfsm_dissect(tl, u_int32_t *, 2138 3 * NFSX_UNSIGNED); 2139 } else { 2140 nfsm_dissect(tl, u_int32_t *, 2141 2 * NFSX_UNSIGNED); 2142 } 2143 if (bigenough) { 2144 if (v3) { 2145 if (nmp->nm_iflag & NFSMNT_SWAPCOOKIE) 2146 uiop->uio_offset = 2147 fxdr_swapcookie3(tl); 2148 else 2149 uiop->uio_offset = 2150 fxdr_cookie3(tl); 2151 } 2152 else { 2153 uiop->uio_offset = 2154 fxdr_unsigned(off_t, *tl); 2155 } 2156 NFS_STASHCOOKIE(dp, uiop->uio_offset); 2157 } 2158 if (v3) 2159 tl += 2; 2160 else 2161 tl++; 2162 more_dirs = fxdr_unsigned(int, *tl); 2163 } 2164 /* 2165 * If at end of rpc data, get the eof boolean 2166 */ 2167 if (!more_dirs) { 2168 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 2169 more_dirs = (fxdr_unsigned(int, *tl) == 0); 2170 } 2171 m_freem(mrep); 2172 } 2173 /* 2174 * Fill last record, iff any, out to a multiple of NFS_DIRFRAGSIZ 2175 * by increasing d_reclen for the last record. 2176 */ 2177 if (blksiz > 0) { 2178 left = NFS_DIRFRAGSIZ - blksiz; 2179 dp->d_reclen += left; 2180 NFS_STASHCOOKIE(dp, uiop->uio_offset); 2181 (caddr_t)uiop->uio_iov->iov_base += left; 2182 uiop->uio_iov->iov_len -= left; 2183 uiop->uio_resid -= left; 2184 } 2185 2186 /* 2187 * We are now either at the end of the directory or have filled the 2188 * block. 2189 */ 2190 if (bigenough) 2191 dnp->n_direofoffset = uiop->uio_offset; 2192 nfsmout: 2193 return (error); 2194 } 2195 2196 /* 2197 * NFS V3 readdir plus RPC. Used in place of nfs_readdirrpc(). 2198 */ 2199 int 2200 nfs_readdirplusrpc(vp, uiop, cred) 2201 struct vnode *vp; 2202 register struct uio *uiop; 2203 struct ucred *cred; 2204 { 2205 register int len, left; 2206 register struct dirent *dp = NULL; 2207 register u_int32_t *tl; 2208 register caddr_t cp; 2209 register int32_t t1, t2; 2210 struct vnode *newvp; 2211 caddr_t bpos, dpos, cp2; 2212 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 2213 struct nameidata nami, *ndp = &nami; 2214 struct componentname *cnp = &ndp->ni_cnd; 2215 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 2216 struct nfsnode *dnp = VTONFS(vp), *np; 2217 const unsigned char *hcp; 2218 nfsfh_t *fhp; 2219 u_quad_t fileno; 2220 int error = 0, tlen, more_dirs = 1, blksiz = 0, doit, bigenough = 1, i; 2221 int attrflag, fhsize, nrpcs = 0, reclen; 2222 struct nfs_fattr fattr, *fp; 2223 2224 #ifdef DIAGNOSTIC 2225 if (uiop->uio_iovcnt != 1 || (uiop->uio_resid & (NFS_DIRBLKSIZ - 1))) 2226 panic("nfs readdirplusrpc bad uio"); 2227 #endif 2228 ndp->ni_dvp = vp; 2229 newvp = NULLVP; 2230 2231 /* 2232 * Loop around doing readdir rpc's of size nm_readdirsize 2233 * truncated to a multiple of NFS_DIRFRAGSIZ. 2234 * The stopping criteria is EOF or buffer full. 2235 */ 2236 while (more_dirs && bigenough) { 2237 if (nrpcs > 0 && uiop->uio_resid < (nmp->nm_readdirsize / 2)) { 2238 bigenough = 0; 2239 break; 2240 } 2241 nfsstats.rpccnt[NFSPROC_READDIRPLUS]++; 2242 nfsm_reqhead(vp, NFSPROC_READDIRPLUS, 2243 NFSX_FH(1) + 6 * NFSX_UNSIGNED); 2244 nfsm_fhtom(vp, 1); 2245 nfsm_build(tl, u_int32_t *, 6 * NFSX_UNSIGNED); 2246 if (nmp->nm_iflag & NFSMNT_SWAPCOOKIE) { 2247 txdr_swapcookie3(uiop->uio_offset, tl); 2248 } else { 2249 txdr_cookie3(uiop->uio_offset, tl); 2250 } 2251 tl += 2; 2252 *tl++ = dnp->n_cookieverf.nfsuquad[0]; 2253 *tl++ = dnp->n_cookieverf.nfsuquad[1]; 2254 *tl++ = txdr_unsigned(nmp->nm_readdirsize); 2255 *tl = txdr_unsigned(nmp->nm_rsize); 2256 nfsm_request(vp, NFSPROC_READDIRPLUS, uiop->uio_procp, cred); 2257 nfsm_postop_attr(vp, attrflag); 2258 if (error) { 2259 m_freem(mrep); 2260 goto nfsmout; 2261 } 2262 nrpcs++; 2263 nfsm_dissect(tl, u_int32_t *, 3 * NFSX_UNSIGNED); 2264 dnp->n_cookieverf.nfsuquad[0] = *tl++; 2265 dnp->n_cookieverf.nfsuquad[1] = *tl++; 2266 more_dirs = fxdr_unsigned(int, *tl); 2267 2268 /* loop thru the dir entries, doctoring them to 4bsd form */ 2269 while (more_dirs && bigenough) { 2270 nfsm_dissect(tl, u_int32_t *, 3 * NFSX_UNSIGNED); 2271 fileno = fxdr_hyper(tl); 2272 len = fxdr_unsigned(int, *(tl + 2)); 2273 if (len <= 0 || len > NFS_MAXNAMLEN) { 2274 error = EBADRPC; 2275 m_freem(mrep); 2276 goto nfsmout; 2277 } 2278 tlen = nfsm_rndup(len); 2279 if (tlen == len) 2280 tlen += 4; /* To ensure null termination*/ 2281 tlen += sizeof (off_t) + sizeof (int); 2282 reclen = ALIGN(tlen + DIRHDSIZ); 2283 tlen = reclen - DIRHDSIZ; 2284 left = NFS_DIRFRAGSIZ - blksiz; 2285 if (reclen > left) { 2286 /* 2287 * DIRFRAGSIZ is aligned, no need to align 2288 * again here. 2289 */ 2290 dp->d_reclen += left; 2291 (caddr_t)uiop->uio_iov->iov_base += left; 2292 uiop->uio_iov->iov_len -= left; 2293 uiop->uio_resid -= left; 2294 NFS_STASHCOOKIE(dp, uiop->uio_offset); 2295 blksiz = 0; 2296 } 2297 if (reclen > uiop->uio_resid) 2298 bigenough = 0; 2299 if (bigenough) { 2300 dp = (struct dirent *)uiop->uio_iov->iov_base; 2301 dp->d_fileno = (int)fileno; 2302 dp->d_namlen = len; 2303 dp->d_reclen = reclen; 2304 dp->d_type = DT_UNKNOWN; 2305 blksiz += dp->d_reclen; 2306 if (blksiz == NFS_DIRFRAGSIZ) 2307 blksiz = 0; 2308 uiop->uio_resid -= DIRHDSIZ; 2309 (caddr_t)uiop->uio_iov->iov_base += DIRHDSIZ; 2310 uiop->uio_iov->iov_len -= DIRHDSIZ; 2311 cnp->cn_nameptr = uiop->uio_iov->iov_base; 2312 cnp->cn_namelen = len; 2313 nfsm_mtouio(uiop, len); 2314 cp = uiop->uio_iov->iov_base; 2315 tlen -= len; 2316 *cp = '\0'; 2317 (caddr_t)uiop->uio_iov->iov_base += tlen; 2318 uiop->uio_iov->iov_len -= tlen; 2319 uiop->uio_resid -= tlen; 2320 } else 2321 nfsm_adv(nfsm_rndup(len)); 2322 nfsm_dissect(tl, u_int32_t *, 3 * NFSX_UNSIGNED); 2323 if (bigenough) { 2324 if (nmp->nm_iflag & NFSMNT_SWAPCOOKIE) 2325 uiop->uio_offset = 2326 fxdr_swapcookie3(tl); 2327 else 2328 uiop->uio_offset = 2329 fxdr_cookie3(tl); 2330 NFS_STASHCOOKIE(dp, uiop->uio_offset); 2331 } 2332 tl += 2; 2333 2334 /* 2335 * Since the attributes are before the file handle 2336 * (sigh), we must skip over the attributes and then 2337 * come back and get them. 2338 */ 2339 attrflag = fxdr_unsigned(int, *tl); 2340 if (attrflag) { 2341 nfsm_dissect(fp, struct nfs_fattr *, NFSX_V3FATTR); 2342 memcpy(&fattr, fp, NFSX_V3FATTR); 2343 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 2344 doit = fxdr_unsigned(int, *tl); 2345 if (doit) { 2346 nfsm_getfh(fhp, fhsize, 1); 2347 if (NFS_CMPFH(dnp, fhp, fhsize)) { 2348 VREF(vp); 2349 newvp = vp; 2350 np = dnp; 2351 } else { 2352 error = nfs_nget(vp->v_mount, fhp, 2353 fhsize, &np); 2354 if (!error) 2355 newvp = NFSTOV(np); 2356 } 2357 if (!error) { 2358 nfs_loadattrcache(&newvp, &fattr, 0); 2359 dp->d_type = 2360 IFTODT(VTTOIF(np->n_vattr->va_type)); 2361 ndp->ni_vp = newvp; 2362 cnp->cn_hash = 0; 2363 for (hcp = cnp->cn_nameptr, i = 1; i <= len; 2364 i++, hcp++) 2365 cnp->cn_hash += *hcp * i; 2366 if (cnp->cn_namelen <= NCHNAMLEN) 2367 cache_enter(ndp->ni_dvp, ndp->ni_vp, 2368 cnp); 2369 } 2370 } 2371 } else { 2372 /* Just skip over the file handle */ 2373 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 2374 i = fxdr_unsigned(int, *tl); 2375 nfsm_adv(nfsm_rndup(i)); 2376 } 2377 if (newvp != NULLVP) { 2378 vrele(newvp); 2379 newvp = NULLVP; 2380 } 2381 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 2382 more_dirs = fxdr_unsigned(int, *tl); 2383 } 2384 /* 2385 * If at end of rpc data, get the eof boolean 2386 */ 2387 if (!more_dirs) { 2388 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 2389 more_dirs = (fxdr_unsigned(int, *tl) == 0); 2390 } 2391 m_freem(mrep); 2392 } 2393 /* 2394 * Fill last record, iff any, out to a multiple of NFS_DIRFRAGSIZ 2395 * by increasing d_reclen for the last record. 2396 */ 2397 if (blksiz > 0) { 2398 left = NFS_DIRFRAGSIZ - blksiz; 2399 dp->d_reclen += left; 2400 NFS_STASHCOOKIE(dp, uiop->uio_offset); 2401 (caddr_t)uiop->uio_iov->iov_base += left; 2402 uiop->uio_iov->iov_len -= left; 2403 uiop->uio_resid -= left; 2404 } 2405 2406 /* 2407 * We are now either at the end of the directory or have filled the 2408 * block. 2409 */ 2410 if (bigenough) 2411 dnp->n_direofoffset = uiop->uio_offset; 2412 nfsmout: 2413 if (newvp != NULLVP) 2414 vrele(newvp); 2415 return (error); 2416 } 2417 static char hextoasc[] = "0123456789abcdef"; 2418 2419 /* 2420 * Silly rename. To make the NFS filesystem that is stateless look a little 2421 * more like the "ufs" a remove of an active vnode is translated to a rename 2422 * to a funny looking filename that is removed by nfs_inactive on the 2423 * nfsnode. There is the potential for another process on a different client 2424 * to create the same funny name between the nfs_lookitup() fails and the 2425 * nfs_rename() completes, but... 2426 */ 2427 int 2428 nfs_sillyrename(dvp, vp, cnp) 2429 struct vnode *dvp, *vp; 2430 struct componentname *cnp; 2431 { 2432 register struct sillyrename *sp; 2433 struct nfsnode *np; 2434 int error; 2435 short pid; 2436 2437 cache_purge(dvp); 2438 np = VTONFS(vp); 2439 #ifndef DIAGNOSTIC 2440 if (vp->v_type == VDIR) 2441 panic("nfs: sillyrename dir"); 2442 #endif 2443 MALLOC(sp, struct sillyrename *, sizeof (struct sillyrename), 2444 M_NFSREQ, M_WAITOK); 2445 sp->s_cred = crdup(cnp->cn_cred); 2446 sp->s_dvp = dvp; 2447 VREF(dvp); 2448 2449 /* Fudge together a funny name */ 2450 pid = cnp->cn_proc->p_pid; 2451 memcpy(sp->s_name, ".nfsAxxxx4.4", 13); 2452 sp->s_namlen = 12; 2453 sp->s_name[8] = hextoasc[pid & 0xf]; 2454 sp->s_name[7] = hextoasc[(pid >> 4) & 0xf]; 2455 sp->s_name[6] = hextoasc[(pid >> 8) & 0xf]; 2456 sp->s_name[5] = hextoasc[(pid >> 12) & 0xf]; 2457 2458 /* Try lookitups until we get one that isn't there */ 2459 while (nfs_lookitup(dvp, sp->s_name, sp->s_namlen, sp->s_cred, 2460 cnp->cn_proc, (struct nfsnode **)0) == 0) { 2461 sp->s_name[4]++; 2462 if (sp->s_name[4] > 'z') { 2463 error = EINVAL; 2464 goto bad; 2465 } 2466 } 2467 error = nfs_renameit(dvp, cnp, sp); 2468 if (error) 2469 goto bad; 2470 error = nfs_lookitup(dvp, sp->s_name, sp->s_namlen, sp->s_cred, 2471 cnp->cn_proc, &np); 2472 np->n_sillyrename = sp; 2473 return (0); 2474 bad: 2475 vrele(sp->s_dvp); 2476 crfree(sp->s_cred); 2477 free((caddr_t)sp, M_NFSREQ); 2478 return (error); 2479 } 2480 2481 /* 2482 * Look up a file name and optionally either update the file handle or 2483 * allocate an nfsnode, depending on the value of npp. 2484 * npp == NULL --> just do the lookup 2485 * *npp == NULL --> allocate a new nfsnode and make sure attributes are 2486 * handled too 2487 * *npp != NULL --> update the file handle in the vnode 2488 */ 2489 int 2490 nfs_lookitup(dvp, name, len, cred, procp, npp) 2491 register struct vnode *dvp; 2492 const char *name; 2493 int len; 2494 struct ucred *cred; 2495 struct proc *procp; 2496 struct nfsnode **npp; 2497 { 2498 register u_int32_t *tl; 2499 register caddr_t cp; 2500 register int32_t t1, t2; 2501 struct vnode *newvp = (struct vnode *)0; 2502 struct nfsnode *np, *dnp = VTONFS(dvp); 2503 caddr_t bpos, dpos, cp2; 2504 int error = 0, fhlen, attrflag; 2505 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 2506 nfsfh_t *nfhp; 2507 int v3 = NFS_ISV3(dvp); 2508 2509 nfsstats.rpccnt[NFSPROC_LOOKUP]++; 2510 nfsm_reqhead(dvp, NFSPROC_LOOKUP, 2511 NFSX_FH(v3) + NFSX_UNSIGNED + nfsm_rndup(len)); 2512 nfsm_fhtom(dvp, v3); 2513 nfsm_strtom(name, len, NFS_MAXNAMLEN); 2514 nfsm_request(dvp, NFSPROC_LOOKUP, procp, cred); 2515 if (npp && !error) { 2516 nfsm_getfh(nfhp, fhlen, v3); 2517 if (*npp) { 2518 np = *npp; 2519 if (np->n_fhsize > NFS_SMALLFH && fhlen <= NFS_SMALLFH) { 2520 free((caddr_t)np->n_fhp, M_NFSBIGFH); 2521 np->n_fhp = &np->n_fh; 2522 } else if (np->n_fhsize <= NFS_SMALLFH && fhlen>NFS_SMALLFH) 2523 np->n_fhp =(nfsfh_t *)malloc(fhlen,M_NFSBIGFH,M_WAITOK); 2524 memcpy((caddr_t)np->n_fhp, (caddr_t)nfhp, fhlen); 2525 np->n_fhsize = fhlen; 2526 newvp = NFSTOV(np); 2527 } else if (NFS_CMPFH(dnp, nfhp, fhlen)) { 2528 VREF(dvp); 2529 newvp = dvp; 2530 } else { 2531 error = nfs_nget(dvp->v_mount, nfhp, fhlen, &np); 2532 if (error) { 2533 m_freem(mrep); 2534 return (error); 2535 } 2536 newvp = NFSTOV(np); 2537 } 2538 if (v3) { 2539 nfsm_postop_attr(newvp, attrflag); 2540 if (!attrflag && *npp == NULL) { 2541 m_freem(mrep); 2542 vrele(newvp); 2543 return (ENOENT); 2544 } 2545 } else 2546 nfsm_loadattr(newvp, (struct vattr *)0); 2547 } 2548 nfsm_reqdone; 2549 if (npp && *npp == NULL) { 2550 if (error) { 2551 if (newvp) 2552 vrele(newvp); 2553 } else 2554 *npp = np; 2555 } 2556 return (error); 2557 } 2558 2559 /* 2560 * Nfs Version 3 commit rpc 2561 */ 2562 int 2563 nfs_commit(vp, offset, cnt, cred, procp) 2564 register struct vnode *vp; 2565 u_quad_t offset; 2566 int cnt; 2567 struct ucred *cred; 2568 struct proc *procp; 2569 { 2570 register caddr_t cp; 2571 register u_int32_t *tl; 2572 register int32_t t1, t2; 2573 register struct nfsmount *nmp = VFSTONFS(vp->v_mount); 2574 caddr_t bpos, dpos, cp2; 2575 int error = 0, wccflag = NFSV3_WCCRATTR; 2576 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 2577 2578 if ((nmp->nm_iflag & NFSMNT_HASWRITEVERF) == 0) 2579 return (0); 2580 nfsstats.rpccnt[NFSPROC_COMMIT]++; 2581 nfsm_reqhead(vp, NFSPROC_COMMIT, NFSX_FH(1)); 2582 nfsm_fhtom(vp, 1); 2583 nfsm_build(tl, u_int32_t *, 3 * NFSX_UNSIGNED); 2584 txdr_hyper(offset, tl); 2585 tl += 2; 2586 *tl = txdr_unsigned(cnt); 2587 nfsm_request(vp, NFSPROC_COMMIT, procp, cred); 2588 nfsm_wcc_data(vp, wccflag); 2589 if (!error) { 2590 nfsm_dissect(tl, u_int32_t *, NFSX_V3WRITEVERF); 2591 if (memcmp((caddr_t)nmp->nm_verf, (caddr_t)tl, 2592 NFSX_V3WRITEVERF)) { 2593 memcpy((caddr_t)nmp->nm_verf, (caddr_t)tl, 2594 NFSX_V3WRITEVERF); 2595 error = NFSERR_STALEWRITEVERF; 2596 } 2597 } 2598 nfsm_reqdone; 2599 return (error); 2600 } 2601 2602 /* 2603 * Kludge City.. 2604 * - make nfs_bmap() essentially a no-op that does no translation 2605 * - do nfs_strategy() by doing I/O with nfs_readrpc/nfs_writerpc 2606 * (Maybe I could use the process's page mapping, but I was concerned that 2607 * Kernel Write might not be enabled and also figured copyout() would do 2608 * a lot more work than memcpy() and also it currently happens in the 2609 * context of the swapper process (2). 2610 */ 2611 int 2612 nfs_bmap(v) 2613 void *v; 2614 { 2615 struct vop_bmap_args /* { 2616 struct vnode *a_vp; 2617 daddr_t a_bn; 2618 struct vnode **a_vpp; 2619 daddr_t *a_bnp; 2620 int *a_runp; 2621 } */ *ap = v; 2622 register struct vnode *vp = ap->a_vp; 2623 2624 if (ap->a_vpp != NULL) 2625 *ap->a_vpp = vp; 2626 if (ap->a_bnp != NULL) 2627 *ap->a_bnp = ap->a_bn * btodb(vp->v_mount->mnt_stat.f_iosize); 2628 return (0); 2629 } 2630 2631 /* 2632 * Strategy routine. 2633 * For async requests when nfsiod(s) are running, queue the request by 2634 * calling nfs_asyncio(), otherwise just all nfs_doio() to do the 2635 * request. 2636 */ 2637 int 2638 nfs_strategy(v) 2639 void *v; 2640 { 2641 struct vop_strategy_args *ap = v; 2642 register struct buf *bp = ap->a_bp; 2643 struct ucred *cr; 2644 struct proc *p; 2645 int error = 0; 2646 2647 if ((bp->b_flags & (B_PHYS|B_ASYNC)) == (B_PHYS|B_ASYNC)) 2648 panic("nfs physio/async"); 2649 if (bp->b_flags & B_ASYNC) 2650 p = (struct proc *)0; 2651 else 2652 p = curproc; /* XXX */ 2653 if (bp->b_flags & B_READ) 2654 cr = bp->b_rcred; 2655 else 2656 cr = bp->b_wcred; 2657 /* 2658 * If the op is asynchronous and an i/o daemon is waiting 2659 * queue the request, wake it up and wait for completion 2660 * otherwise just do it ourselves. 2661 */ 2662 if ((bp->b_flags & B_ASYNC) == 0 || 2663 nfs_asyncio(bp, NOCRED)) 2664 error = nfs_doio(bp, cr, p); 2665 return (error); 2666 } 2667 2668 /* 2669 * Mmap a file 2670 * 2671 * NB Currently unsupported. 2672 */ 2673 /* ARGSUSED */ 2674 int 2675 nfs_mmap(v) 2676 void *v; 2677 { 2678 #if 0 2679 struct vop_mmap_args /* { 2680 struct vnode *a_vp; 2681 int a_fflags; 2682 struct ucred *a_cred; 2683 struct proc *a_p; 2684 } */ *ap = v; 2685 #endif 2686 2687 return (EINVAL); 2688 } 2689 2690 /* 2691 * fsync vnode op. Just call nfs_flush() with commit == 1. 2692 */ 2693 /* ARGSUSED */ 2694 int 2695 nfs_fsync(v) 2696 void *v; 2697 { 2698 struct vop_fsync_args /* { 2699 struct vnodeop_desc *a_desc; 2700 struct vnode * a_vp; 2701 struct ucred * a_cred; 2702 int a_flags; 2703 struct proc * a_p; 2704 } */ *ap = v; 2705 2706 return (nfs_flush(ap->a_vp, ap->a_cred, 2707 (ap->a_flags & FSYNC_WAIT) != 0 ? MNT_WAIT : 0, ap->a_p, 1)); 2708 } 2709 2710 /* 2711 * Flush all the blocks associated with a vnode. 2712 * Walk through the buffer pool and push any dirty pages 2713 * associated with the vnode. 2714 */ 2715 int 2716 nfs_flush(vp, cred, waitfor, p, commit) 2717 register struct vnode *vp; 2718 struct ucred *cred; 2719 int waitfor; 2720 struct proc *p; 2721 int commit; 2722 { 2723 register struct nfsnode *np = VTONFS(vp); 2724 register struct buf *bp; 2725 register int i; 2726 struct buf *nbp; 2727 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 2728 int s, error = 0, slptimeo = 0, slpflag = 0, retv, bvecpos; 2729 int passone = 1; 2730 u_quad_t off = (u_quad_t)-1, endoff = 0, toff; 2731 struct ucred* wcred = NULL; 2732 #ifndef NFS_COMMITBVECSIZ 2733 #define NFS_COMMITBVECSIZ 20 2734 #endif 2735 struct buf *bvec[NFS_COMMITBVECSIZ]; 2736 2737 if (nmp->nm_flag & NFSMNT_INT) 2738 slpflag = PCATCH; 2739 if (!commit) 2740 passone = 0; 2741 /* 2742 * A b_flags == (B_DELWRI | B_NEEDCOMMIT) block has been written to the 2743 * server, but nas not been committed to stable storage on the server 2744 * yet. On the first pass, the byte range is worked out and the commit 2745 * rpc is done. On the second pass, nfs_writebp() is called to do the 2746 * job. 2747 */ 2748 again: 2749 bvecpos = 0; 2750 if (NFS_ISV3(vp) && commit) { 2751 s = splbio(); 2752 for (bp = vp->v_dirtyblkhd.lh_first; bp; bp = nbp) { 2753 nbp = bp->b_vnbufs.le_next; 2754 if (bvecpos >= NFS_COMMITBVECSIZ) 2755 break; 2756 if ((bp->b_flags & (B_BUSY | B_DELWRI | B_NEEDCOMMIT)) 2757 != (B_DELWRI | B_NEEDCOMMIT)) 2758 continue; 2759 bremfree(bp); 2760 /* 2761 * Work out if all buffers are using the same cred 2762 * so we can deal with them all with one commit. 2763 */ 2764 if (wcred == NULL) 2765 wcred = bp->b_wcred; 2766 else if (wcred != bp->b_wcred) 2767 wcred = NOCRED; 2768 bp->b_flags |= (B_BUSY | B_WRITEINPROG); 2769 /* 2770 * A list of these buffers is kept so that the 2771 * second loop knows which buffers have actually 2772 * been committed. This is necessary, since there 2773 * may be a race between the commit rpc and new 2774 * uncommitted writes on the file. 2775 */ 2776 bvec[bvecpos++] = bp; 2777 toff = ((u_quad_t)bp->b_blkno) * DEV_BSIZE + 2778 bp->b_dirtyoff; 2779 if (toff < off) 2780 off = toff; 2781 toff += (u_quad_t)(bp->b_dirtyend - bp->b_dirtyoff); 2782 if (toff > endoff) 2783 endoff = toff; 2784 } 2785 splx(s); 2786 } 2787 if (bvecpos > 0) { 2788 /* 2789 * Commit data on the server, as required. 2790 * If all bufs are using the same wcred, then use that with 2791 * one call for all of them, otherwise commit each one 2792 * separately. 2793 */ 2794 if (wcred != NOCRED) 2795 retv = nfs_commit(vp, off, (int)(endoff - off), 2796 wcred, p); 2797 else { 2798 retv = 0; 2799 for (i = 0; i < bvecpos; i++) { 2800 off_t off, size; 2801 bp = bvec[i]; 2802 off = ((u_quad_t)bp->b_blkno) * DEV_BSIZE + 2803 bp->b_dirtyoff; 2804 size = (u_quad_t)(bp->b_dirtyend 2805 - bp->b_dirtyoff); 2806 retv = nfs_commit(vp, off, (int)size, 2807 bp->b_wcred, p); 2808 if (retv) break; 2809 } 2810 } 2811 2812 if (retv == NFSERR_STALEWRITEVERF) 2813 nfs_clearcommit(vp->v_mount); 2814 /* 2815 * Now, either mark the blocks I/O done or mark the 2816 * blocks dirty, depending on whether the commit 2817 * succeeded. 2818 */ 2819 for (i = 0; i < bvecpos; i++) { 2820 bp = bvec[i]; 2821 bp->b_flags &= ~(B_NEEDCOMMIT | B_WRITEINPROG); 2822 if (retv) 2823 brelse(bp); 2824 else { 2825 vp->v_numoutput++; 2826 bp->b_flags |= B_ASYNC; 2827 bp->b_flags &= ~(B_READ|B_DONE|B_ERROR|B_DELWRI); 2828 bp->b_dirtyoff = bp->b_dirtyend = 0; 2829 reassignbuf(bp, vp); 2830 biodone(bp); 2831 } 2832 } 2833 } 2834 2835 /* 2836 * Start/do any write(s) that are required. 2837 */ 2838 loop: 2839 s = splbio(); 2840 for (bp = vp->v_dirtyblkhd.lh_first; bp; bp = nbp) { 2841 nbp = bp->b_vnbufs.le_next; 2842 if (bp->b_flags & B_BUSY) { 2843 if (waitfor != MNT_WAIT || passone) 2844 continue; 2845 bp->b_flags |= B_WANTED; 2846 error = tsleep((caddr_t)bp, slpflag | (PRIBIO + 1), 2847 "nfsfsync", slptimeo); 2848 splx(s); 2849 if (error) { 2850 if (nfs_sigintr(nmp, (struct nfsreq *)0, p)) 2851 return (EINTR); 2852 if (slpflag == PCATCH) { 2853 slpflag = 0; 2854 slptimeo = 2 * hz; 2855 } 2856 } 2857 goto loop; 2858 } 2859 if ((bp->b_flags & B_DELWRI) == 0) 2860 panic("nfs_fsync: not dirty"); 2861 if ((passone || !commit) && (bp->b_flags & B_NEEDCOMMIT)) 2862 continue; 2863 bremfree(bp); 2864 if (passone || !commit) 2865 bp->b_flags |= (B_BUSY|B_ASYNC); 2866 else 2867 bp->b_flags |= (B_BUSY|B_ASYNC|B_WRITEINPROG|B_NEEDCOMMIT); 2868 splx(s); 2869 VOP_BWRITE(bp); 2870 goto loop; 2871 } 2872 splx(s); 2873 if (passone) { 2874 passone = 0; 2875 goto again; 2876 } 2877 if (waitfor == MNT_WAIT) { 2878 while (vp->v_numoutput) { 2879 vp->v_flag |= VBWAIT; 2880 error = tsleep((caddr_t)&vp->v_numoutput, 2881 slpflag | (PRIBIO + 1), "nfsfsync", slptimeo); 2882 if (error) { 2883 if (nfs_sigintr(nmp, (struct nfsreq *)0, p)) 2884 return (EINTR); 2885 if (slpflag == PCATCH) { 2886 slpflag = 0; 2887 slptimeo = 2 * hz; 2888 } 2889 } 2890 } 2891 if (vp->v_dirtyblkhd.lh_first && commit) { 2892 #if 0 2893 vprint("nfs_fsync: dirty", vp); 2894 #endif 2895 goto loop; 2896 } 2897 } 2898 if (np->n_flag & NWRITEERR) { 2899 error = np->n_error; 2900 np->n_flag &= ~NWRITEERR; 2901 } 2902 return (error); 2903 } 2904 2905 /* 2906 * Return POSIX pathconf information applicable to nfs. 2907 * 2908 * N.B. The NFS V2 protocol doesn't support this RPC. 2909 */ 2910 /* ARGSUSED */ 2911 int 2912 nfs_pathconf(v) 2913 void *v; 2914 { 2915 struct vop_pathconf_args /* { 2916 struct vnode *a_vp; 2917 int a_name; 2918 register_t *a_retval; 2919 } */ *ap = v; 2920 struct nfsv3_pathconf *pcp; 2921 struct vnode *vp = ap->a_vp; 2922 struct nfsmount *nmp; 2923 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 2924 int32_t t1, t2; 2925 u_int32_t *tl; 2926 caddr_t bpos, dpos, cp, cp2; 2927 int error = 0, attrflag; 2928 unsigned int l; 2929 u_int64_t maxsize; 2930 int v3 = NFS_ISV3(vp); 2931 2932 switch (ap->a_name) { 2933 /* Names that can be resolved locally. */ 2934 case _PC_PIPE_BUF: 2935 *ap->a_retval = PIPE_BUF; 2936 break; 2937 case _PC_SYNC_IO: 2938 *ap->a_retval = 1; 2939 break; 2940 /* Names that cannot be resolved locally; do an RPC, if possible. */ 2941 case _PC_LINK_MAX: 2942 case _PC_NAME_MAX: 2943 case _PC_CHOWN_RESTRICTED: 2944 case _PC_NO_TRUNC: 2945 if (!v3) { 2946 error = EINVAL; 2947 break; 2948 } 2949 nfsstats.rpccnt[NFSPROC_PATHCONF]++; 2950 nfsm_reqhead(vp, NFSPROC_PATHCONF, NFSX_FH(1)); 2951 nfsm_fhtom(vp, 1); 2952 nfsm_request(vp, NFSPROC_PATHCONF, 2953 curproc, curproc->p_ucred); /* XXX */ 2954 nfsm_postop_attr(vp, attrflag); 2955 if (!error) { 2956 nfsm_dissect(pcp, struct nfsv3_pathconf *, 2957 NFSX_V3PATHCONF); 2958 switch (ap->a_name) { 2959 case _PC_LINK_MAX: 2960 *ap->a_retval = 2961 fxdr_unsigned(register_t, pcp->pc_linkmax); 2962 break; 2963 case _PC_NAME_MAX: 2964 *ap->a_retval = 2965 fxdr_unsigned(register_t, pcp->pc_namemax); 2966 break; 2967 case _PC_CHOWN_RESTRICTED: 2968 *ap->a_retval = 2969 (pcp->pc_chownrestricted == nfs_true); 2970 break; 2971 case _PC_NO_TRUNC: 2972 *ap->a_retval = 2973 (pcp->pc_notrunc == nfs_true); 2974 break; 2975 } 2976 } 2977 nfsm_reqdone; 2978 break; 2979 case _PC_FILESIZEBITS: 2980 if (v3) { 2981 nmp = VFSTONFS(vp->v_mount); 2982 if ((nmp->nm_iflag & NFSMNT_GOTFSINFO) == 0) 2983 if ((error = nfs_fsinfo(nmp, vp, 2984 curproc->p_ucred, curproc)) != 0) /* XXX */ 2985 break; 2986 for (l = 0, maxsize = nmp->nm_maxfilesize; 2987 (maxsize >> l) > 0; l++) 2988 ; 2989 *ap->a_retval = l + 1; 2990 } else { 2991 *ap->a_retval = 32; /* NFS V2 limitation */ 2992 } 2993 break; 2994 default: 2995 error = EINVAL; 2996 break; 2997 } 2998 2999 return (error); 3000 } 3001 3002 /* 3003 * NFS advisory byte-level locks. 3004 */ 3005 int 3006 nfs_advlock(v) 3007 void *v; 3008 { 3009 struct vop_advlock_args /* { 3010 struct vnode *a_vp; 3011 caddr_t a_id; 3012 int a_op; 3013 struct flock *a_fl; 3014 int a_flags; 3015 } */ *ap = v; 3016 register struct nfsnode *np = VTONFS(ap->a_vp); 3017 3018 return (lf_advlock(&np->n_lockf, np->n_size, ap->a_id, ap->a_op, 3019 ap->a_fl, ap->a_flags)); 3020 } 3021 3022 /* 3023 * Print out the contents of an nfsnode. 3024 */ 3025 int 3026 nfs_print(v) 3027 void *v; 3028 { 3029 struct vop_print_args /* { 3030 struct vnode *a_vp; 3031 } */ *ap = v; 3032 register struct vnode *vp = ap->a_vp; 3033 register struct nfsnode *np = VTONFS(vp); 3034 3035 printf("tag VT_NFS, fileid %ld fsid 0x%lx", 3036 np->n_vattr->va_fileid, np->n_vattr->va_fsid); 3037 if (vp->v_type == VFIFO) 3038 fifo_printinfo(vp); 3039 printf("\n"); 3040 return (0); 3041 } 3042 3043 /* 3044 * NFS file truncation. 3045 */ 3046 int 3047 nfs_truncate(v) 3048 void *v; 3049 { 3050 #if 0 3051 struct vop_truncate_args /* { 3052 struct vnode *a_vp; 3053 off_t a_length; 3054 int a_flags; 3055 struct ucred *a_cred; 3056 struct proc *a_p; 3057 } */ *ap = v; 3058 #endif 3059 3060 /* Use nfs_setattr */ 3061 return (EOPNOTSUPP); 3062 } 3063 3064 /* 3065 * NFS update. 3066 */ 3067 int 3068 nfs_update(v) 3069 void *v; 3070 #if 0 3071 struct vop_update_args /* { 3072 struct vnode *a_vp; 3073 struct timespec *a_ta; 3074 struct timespec *a_tm; 3075 int a_waitfor; 3076 } */ *ap = v; 3077 #endif 3078 { 3079 3080 /* Use nfs_setattr */ 3081 return (EOPNOTSUPP); 3082 } 3083 3084 /* 3085 * Just call nfs_writebp() with the force argument set to 1. 3086 */ 3087 int 3088 nfs_bwrite(v) 3089 void *v; 3090 { 3091 struct vop_bwrite_args /* { 3092 struct vnode *a_bp; 3093 } */ *ap = v; 3094 3095 return (nfs_writebp(ap->a_bp, 1)); 3096 } 3097 3098 /* 3099 * This is a clone of vn_bwrite(), except that B_WRITEINPROG isn't set unless 3100 * the force flag is one and it also handles the B_NEEDCOMMIT flag. 3101 */ 3102 int 3103 nfs_writebp(bp, force) 3104 register struct buf *bp; 3105 int force; 3106 { 3107 register int oldflags = bp->b_flags, retv = 1; 3108 register struct proc *p = curproc; /* XXX */ 3109 off_t off; 3110 3111 if(!(bp->b_flags & B_BUSY)) 3112 panic("bwrite: buffer is not busy???"); 3113 3114 #ifdef fvdl_debug 3115 printf("nfs_writebp(%x): vp %x voff %d vend %d doff %d dend %d\n", 3116 bp, bp->b_vp, bp->b_validoff, bp->b_validend, bp->b_dirtyoff, 3117 bp->b_dirtyend); 3118 #endif 3119 bp->b_flags &= ~(B_READ|B_DONE|B_ERROR|B_DELWRI|B_AGE); 3120 3121 if (oldflags & B_ASYNC) { 3122 if (oldflags & B_DELWRI) { 3123 reassignbuf(bp, bp->b_vp); 3124 } else if (p) { 3125 ++p->p_stats->p_ru.ru_oublock; 3126 } 3127 } 3128 bp->b_vp->v_numoutput++; 3129 3130 /* 3131 * If B_NEEDCOMMIT is set, a commit rpc may do the trick. If not 3132 * an actual write will have to be scheduled via. VOP_STRATEGY(). 3133 * If B_WRITEINPROG is already set, then push it with a write anyhow. 3134 */ 3135 if ((oldflags & (B_NEEDCOMMIT | B_WRITEINPROG)) == B_NEEDCOMMIT) { 3136 off = ((u_quad_t)bp->b_blkno) * DEV_BSIZE + bp->b_dirtyoff; 3137 bp->b_flags |= B_WRITEINPROG; 3138 retv = nfs_commit(bp->b_vp, off, bp->b_dirtyend-bp->b_dirtyoff, 3139 bp->b_wcred, bp->b_proc); 3140 bp->b_flags &= ~B_WRITEINPROG; 3141 if (!retv) { 3142 bp->b_dirtyoff = bp->b_dirtyend = 0; 3143 bp->b_flags &= ~B_NEEDCOMMIT; 3144 biodone(bp); 3145 } else if (retv == NFSERR_STALEWRITEVERF) 3146 nfs_clearcommit(bp->b_vp->v_mount); 3147 } 3148 if (retv) { 3149 if (force) 3150 bp->b_flags |= B_WRITEINPROG; 3151 VOP_STRATEGY(bp); 3152 } 3153 3154 if( (oldflags & B_ASYNC) == 0) { 3155 int rtval = biowait(bp); 3156 if (oldflags & B_DELWRI) { 3157 reassignbuf(bp, bp->b_vp); 3158 } else if (p) { 3159 ++p->p_stats->p_ru.ru_oublock; 3160 } 3161 brelse(bp); 3162 return (rtval); 3163 } 3164 3165 return (0); 3166 } 3167 3168 /* 3169 * nfs special file access vnode op. 3170 * Essentially just get vattr and then imitate iaccess() since the device is 3171 * local to the client. 3172 */ 3173 int 3174 nfsspec_access(v) 3175 void *v; 3176 { 3177 struct vop_access_args /* { 3178 struct vnode *a_vp; 3179 int a_mode; 3180 struct ucred *a_cred; 3181 struct proc *a_p; 3182 } */ *ap = v; 3183 struct vattr va; 3184 struct vnode *vp = ap->a_vp; 3185 int error; 3186 3187 error = VOP_GETATTR(vp, &va, ap->a_cred, ap->a_p); 3188 if (error) 3189 return (error); 3190 3191 /* 3192 * Disallow write attempts on filesystems mounted read-only; 3193 * unless the file is a socket, fifo, or a block or character 3194 * device resident on the filesystem. 3195 */ 3196 if ((ap->a_mode & VWRITE) && (vp->v_mount->mnt_flag & MNT_RDONLY)) { 3197 switch (vp->v_type) { 3198 case VREG: 3199 case VDIR: 3200 case VLNK: 3201 return (EROFS); 3202 default: 3203 break; 3204 } 3205 } 3206 3207 return (vaccess(va.va_type, va.va_mode, 3208 va.va_uid, va.va_gid, ap->a_mode, ap->a_cred)); 3209 } 3210 3211 /* 3212 * Read wrapper for special devices. 3213 */ 3214 int 3215 nfsspec_read(v) 3216 void *v; 3217 { 3218 struct vop_read_args /* { 3219 struct vnode *a_vp; 3220 struct uio *a_uio; 3221 int a_ioflag; 3222 struct ucred *a_cred; 3223 } */ *ap = v; 3224 register struct nfsnode *np = VTONFS(ap->a_vp); 3225 3226 /* 3227 * Set access flag. 3228 */ 3229 np->n_flag |= NACC; 3230 np->n_atim.tv_sec = time.tv_sec; 3231 np->n_atim.tv_nsec = time.tv_usec * 1000; 3232 return (VOCALL(spec_vnodeop_p, VOFFSET(vop_read), ap)); 3233 } 3234 3235 /* 3236 * Write wrapper for special devices. 3237 */ 3238 int 3239 nfsspec_write(v) 3240 void *v; 3241 { 3242 struct vop_write_args /* { 3243 struct vnode *a_vp; 3244 struct uio *a_uio; 3245 int a_ioflag; 3246 struct ucred *a_cred; 3247 } */ *ap = v; 3248 register struct nfsnode *np = VTONFS(ap->a_vp); 3249 3250 /* 3251 * Set update flag. 3252 */ 3253 np->n_flag |= NUPD; 3254 np->n_mtim.tv_sec = time.tv_sec; 3255 np->n_mtim.tv_nsec = time.tv_usec * 1000; 3256 return (VOCALL(spec_vnodeop_p, VOFFSET(vop_write), ap)); 3257 } 3258 3259 /* 3260 * Close wrapper for special devices. 3261 * 3262 * Update the times on the nfsnode then do device close. 3263 */ 3264 int 3265 nfsspec_close(v) 3266 void *v; 3267 { 3268 struct vop_close_args /* { 3269 struct vnode *a_vp; 3270 int a_fflag; 3271 struct ucred *a_cred; 3272 struct proc *a_p; 3273 } */ *ap = v; 3274 register struct vnode *vp = ap->a_vp; 3275 register struct nfsnode *np = VTONFS(vp); 3276 struct vattr vattr; 3277 3278 if (np->n_flag & (NACC | NUPD)) { 3279 np->n_flag |= NCHG; 3280 if (vp->v_usecount == 1 && 3281 (vp->v_mount->mnt_flag & MNT_RDONLY) == 0) { 3282 VATTR_NULL(&vattr); 3283 if (np->n_flag & NACC) 3284 vattr.va_atime = np->n_atim; 3285 if (np->n_flag & NUPD) 3286 vattr.va_mtime = np->n_mtim; 3287 (void)VOP_SETATTR(vp, &vattr, ap->a_cred, ap->a_p); 3288 } 3289 } 3290 return (VOCALL(spec_vnodeop_p, VOFFSET(vop_close), ap)); 3291 } 3292 3293 /* 3294 * Read wrapper for fifos. 3295 */ 3296 int 3297 nfsfifo_read(v) 3298 void *v; 3299 { 3300 struct vop_read_args /* { 3301 struct vnode *a_vp; 3302 struct uio *a_uio; 3303 int a_ioflag; 3304 struct ucred *a_cred; 3305 } */ *ap = v; 3306 extern int (**fifo_vnodeop_p) __P((void *)); 3307 register struct nfsnode *np = VTONFS(ap->a_vp); 3308 3309 /* 3310 * Set access flag. 3311 */ 3312 np->n_flag |= NACC; 3313 np->n_atim.tv_sec = time.tv_sec; 3314 np->n_atim.tv_nsec = time.tv_usec * 1000; 3315 return (VOCALL(fifo_vnodeop_p, VOFFSET(vop_read), ap)); 3316 } 3317 3318 /* 3319 * Write wrapper for fifos. 3320 */ 3321 int 3322 nfsfifo_write(v) 3323 void *v; 3324 { 3325 struct vop_write_args /* { 3326 struct vnode *a_vp; 3327 struct uio *a_uio; 3328 int a_ioflag; 3329 struct ucred *a_cred; 3330 } */ *ap = v; 3331 extern int (**fifo_vnodeop_p) __P((void *)); 3332 register struct nfsnode *np = VTONFS(ap->a_vp); 3333 3334 /* 3335 * Set update flag. 3336 */ 3337 np->n_flag |= NUPD; 3338 np->n_mtim.tv_sec = time.tv_sec; 3339 np->n_mtim.tv_nsec = time.tv_usec * 1000; 3340 return (VOCALL(fifo_vnodeop_p, VOFFSET(vop_write), ap)); 3341 } 3342 3343 /* 3344 * Close wrapper for fifos. 3345 * 3346 * Update the times on the nfsnode then do fifo close. 3347 */ 3348 int 3349 nfsfifo_close(v) 3350 void *v; 3351 { 3352 struct vop_close_args /* { 3353 struct vnode *a_vp; 3354 int a_fflag; 3355 struct ucred *a_cred; 3356 struct proc *a_p; 3357 } */ *ap = v; 3358 register struct vnode *vp = ap->a_vp; 3359 register struct nfsnode *np = VTONFS(vp); 3360 struct vattr vattr; 3361 extern int (**fifo_vnodeop_p) __P((void *)); 3362 3363 if (np->n_flag & (NACC | NUPD)) { 3364 if (np->n_flag & NACC) { 3365 np->n_atim.tv_sec = time.tv_sec; 3366 np->n_atim.tv_nsec = time.tv_usec * 1000; 3367 } 3368 if (np->n_flag & NUPD) { 3369 np->n_mtim.tv_sec = time.tv_sec; 3370 np->n_mtim.tv_nsec = time.tv_usec * 1000; 3371 } 3372 np->n_flag |= NCHG; 3373 if (vp->v_usecount == 1 && 3374 (vp->v_mount->mnt_flag & MNT_RDONLY) == 0) { 3375 VATTR_NULL(&vattr); 3376 if (np->n_flag & NACC) 3377 vattr.va_atime = np->n_atim; 3378 if (np->n_flag & NUPD) 3379 vattr.va_mtime = np->n_mtim; 3380 (void)VOP_SETATTR(vp, &vattr, ap->a_cred, ap->a_p); 3381 } 3382 } 3383 return (VOCALL(fifo_vnodeop_p, VOFFSET(vop_close), ap)); 3384 } 3385
Indexes created Tue Oct 14 15:09:51 GMT 2025