nfs_vnops.c revision 1.113.4.2
1 /* $NetBSD: nfs_vnops.c,v 1.113.4.2 2000/09/19 18:43:15 fvdl 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/namei.h> 56 #include <sys/vnode.h> 57 #include <sys/dirent.h> 58 #include <sys/fcntl.h> 59 #include <sys/lockf.h> 60 #include <sys/stat.h> 61 #include <sys/unistd.h> 62 63 #include <vm/vm.h> 64 65 #include <uvm/uvm_extern.h> 66 67 #include <miscfs/fifofs/fifo.h> 68 #include <miscfs/genfs/genfs.h> 69 #include <miscfs/specfs/specdev.h> 70 71 #include <nfs/rpcv2.h> 72 #include <nfs/nfsproto.h> 73 #include <nfs/nfs.h> 74 #include <nfs/nfsnode.h> 75 #include <nfs/nfsmount.h> 76 #include <nfs/xdr_subs.h> 77 #include <nfs/nfsm_subs.h> 78 #include <nfs/nqnfs.h> 79 #include <nfs/nfs_var.h> 80 81 #include <net/if.h> 82 #include <netinet/in.h> 83 #include <netinet/in_var.h> 84 85 /* Defs */ 86 #define TRUE 1 87 #define FALSE 0 88 89 /* 90 * Global vfs data structures for nfs 91 */ 92 int (**nfsv2_vnodeop_p) __P((void *)); 93 struct vnodeopv_entry_desc nfsv2_vnodeop_entries[] = { 94 { &vop_default_desc, vn_default_error }, 95 { &vop_lookup_desc, nfs_lookup }, /* lookup */ 96 { &vop_create_desc, nfs_create }, /* create */ 97 { &vop_mknod_desc, nfs_mknod }, /* mknod */ 98 { &vop_open_desc, nfs_open }, /* open */ 99 { &vop_close_desc, nfs_close }, /* close */ 100 { &vop_access_desc, nfs_access }, /* access */ 101 { &vop_getattr_desc, nfs_getattr }, /* getattr */ 102 { &vop_setattr_desc, nfs_setattr }, /* setattr */ 103 { &vop_read_desc, nfs_read }, /* read */ 104 { &vop_write_desc, nfs_write }, /* write */ 105 { &vop_lease_desc, nfs_lease_check }, /* lease */ 106 { &vop_fcntl_desc, genfs_fcntl }, /* fcntl */ 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_fcntl_desc, genfs_fcntl }, /* fcntl */ 162 { &vop_ioctl_desc, spec_ioctl }, /* ioctl */ 163 { &vop_poll_desc, spec_poll }, /* poll */ 164 { &vop_revoke_desc, spec_revoke }, /* revoke */ 165 { &vop_mmap_desc, spec_mmap }, /* mmap */ 166 { &vop_fsync_desc, nfs_fsync }, /* fsync */ 167 { &vop_seek_desc, spec_seek }, /* seek */ 168 { &vop_remove_desc, spec_remove }, /* remove */ 169 { &vop_link_desc, spec_link }, /* link */ 170 { &vop_rename_desc, spec_rename }, /* rename */ 171 { &vop_mkdir_desc, spec_mkdir }, /* mkdir */ 172 { &vop_rmdir_desc, spec_rmdir }, /* rmdir */ 173 { &vop_symlink_desc, spec_symlink }, /* symlink */ 174 { &vop_readdir_desc, spec_readdir }, /* readdir */ 175 { &vop_readlink_desc, spec_readlink }, /* readlink */ 176 { &vop_abortop_desc, spec_abortop }, /* abortop */ 177 { &vop_inactive_desc, nfs_inactive }, /* inactive */ 178 { &vop_reclaim_desc, nfs_reclaim }, /* reclaim */ 179 { &vop_lock_desc, nfs_lock }, /* lock */ 180 { &vop_unlock_desc, nfs_unlock }, /* unlock */ 181 { &vop_bmap_desc, spec_bmap }, /* bmap */ 182 { &vop_strategy_desc, spec_strategy }, /* strategy */ 183 { &vop_print_desc, nfs_print }, /* print */ 184 { &vop_islocked_desc, nfs_islocked }, /* islocked */ 185 { &vop_pathconf_desc, spec_pathconf }, /* pathconf */ 186 { &vop_advlock_desc, spec_advlock }, /* advlock */ 187 { &vop_blkatoff_desc, spec_blkatoff }, /* blkatoff */ 188 { &vop_valloc_desc, spec_valloc }, /* valloc */ 189 { &vop_reallocblks_desc, spec_reallocblks }, /* reallocblks */ 190 { &vop_vfree_desc, spec_vfree }, /* vfree */ 191 { &vop_truncate_desc, spec_truncate }, /* truncate */ 192 { &vop_update_desc, nfs_update }, /* update */ 193 { &vop_bwrite_desc, vn_bwrite }, /* bwrite */ 194 { (struct vnodeop_desc*)NULL, (int(*) __P((void *)))NULL } 195 }; 196 struct vnodeopv_desc spec_nfsv2nodeop_opv_desc = 197 { &spec_nfsv2nodeop_p, spec_nfsv2nodeop_entries }; 198 199 int (**fifo_nfsv2nodeop_p) __P((void *)); 200 struct vnodeopv_entry_desc fifo_nfsv2nodeop_entries[] = { 201 { &vop_default_desc, vn_default_error }, 202 { &vop_lookup_desc, fifo_lookup }, /* lookup */ 203 { &vop_create_desc, fifo_create }, /* create */ 204 { &vop_mknod_desc, fifo_mknod }, /* mknod */ 205 { &vop_open_desc, fifo_open }, /* open */ 206 { &vop_close_desc, nfsfifo_close }, /* close */ 207 { &vop_access_desc, nfsspec_access }, /* access */ 208 { &vop_getattr_desc, nfs_getattr }, /* getattr */ 209 { &vop_setattr_desc, nfs_setattr }, /* setattr */ 210 { &vop_read_desc, nfsfifo_read }, /* read */ 211 { &vop_write_desc, nfsfifo_write }, /* write */ 212 { &vop_lease_desc, fifo_lease_check }, /* lease */ 213 { &vop_fcntl_desc, genfs_fcntl }, /* fcntl */ 214 { &vop_ioctl_desc, fifo_ioctl }, /* ioctl */ 215 { &vop_poll_desc, fifo_poll }, /* poll */ 216 { &vop_revoke_desc, fifo_revoke }, /* revoke */ 217 { &vop_mmap_desc, fifo_mmap }, /* mmap */ 218 { &vop_fsync_desc, nfs_fsync }, /* fsync */ 219 { &vop_seek_desc, fifo_seek }, /* seek */ 220 { &vop_remove_desc, fifo_remove }, /* remove */ 221 { &vop_link_desc, fifo_link }, /* link */ 222 { &vop_rename_desc, fifo_rename }, /* rename */ 223 { &vop_mkdir_desc, fifo_mkdir }, /* mkdir */ 224 { &vop_rmdir_desc, fifo_rmdir }, /* rmdir */ 225 { &vop_symlink_desc, fifo_symlink }, /* symlink */ 226 { &vop_readdir_desc, fifo_readdir }, /* readdir */ 227 { &vop_readlink_desc, fifo_readlink }, /* readlink */ 228 { &vop_abortop_desc, fifo_abortop }, /* abortop */ 229 { &vop_inactive_desc, nfs_inactive }, /* inactive */ 230 { &vop_reclaim_desc, nfs_reclaim }, /* reclaim */ 231 { &vop_lock_desc, nfs_lock }, /* lock */ 232 { &vop_unlock_desc, nfs_unlock }, /* unlock */ 233 { &vop_bmap_desc, fifo_bmap }, /* bmap */ 234 { &vop_strategy_desc, genfs_badop }, /* strategy */ 235 { &vop_print_desc, nfs_print }, /* print */ 236 { &vop_islocked_desc, nfs_islocked }, /* islocked */ 237 { &vop_pathconf_desc, fifo_pathconf }, /* pathconf */ 238 { &vop_advlock_desc, fifo_advlock }, /* advlock */ 239 { &vop_blkatoff_desc, fifo_blkatoff }, /* blkatoff */ 240 { &vop_valloc_desc, fifo_valloc }, /* valloc */ 241 { &vop_reallocblks_desc, fifo_reallocblks }, /* reallocblks */ 242 { &vop_vfree_desc, fifo_vfree }, /* vfree */ 243 { &vop_truncate_desc, fifo_truncate }, /* truncate */ 244 { &vop_update_desc, nfs_update }, /* update */ 245 { &vop_bwrite_desc, vn_bwrite }, /* bwrite */ 246 { (struct vnodeop_desc*)NULL, (int(*) __P((void *)))NULL } 247 }; 248 struct vnodeopv_desc fifo_nfsv2nodeop_opv_desc = 249 { &fifo_nfsv2nodeop_p, fifo_nfsv2nodeop_entries }; 250 251 /* 252 * Global variables 253 */ 254 extern u_int32_t nfs_true, nfs_false; 255 extern u_int32_t nfs_xdrneg1; 256 extern struct nfsstats nfsstats; 257 extern nfstype nfsv3_type[9]; 258 struct proc *nfs_iodwant[NFS_MAXASYNCDAEMON]; 259 struct nfsmount *nfs_iodmount[NFS_MAXASYNCDAEMON]; 260 int nfs_numasync = 0; 261 #define DIRHDSIZ (sizeof (struct dirent) - (MAXNAMLEN + 1)) 262 263 /* 264 * nfs null call from vfs. 265 */ 266 int 267 nfs_null(vp, cred, procp) 268 struct vnode *vp; 269 struct ucred *cred; 270 struct proc *procp; 271 { 272 caddr_t bpos, dpos; 273 int error = 0; 274 struct mbuf *mreq, *mrep, *md, *mb; 275 276 nfsm_reqhead(vp, NFSPROC_NULL, 0); 277 nfsm_request(vp, NFSPROC_NULL, procp, cred); 278 nfsm_reqdone; 279 return (error); 280 } 281 282 /* 283 * nfs access vnode op. 284 * For nfs version 2, just return ok. File accesses may fail later. 285 * For nfs version 3, use the access rpc to check accessibility. If file modes 286 * are changed on the server, accesses might still fail later. 287 */ 288 int 289 nfs_access(v) 290 void *v; 291 { 292 struct vop_access_args /* { 293 struct vnode *a_vp; 294 int a_mode; 295 struct ucred *a_cred; 296 struct proc *a_p; 297 } */ *ap = v; 298 struct vnode *vp = ap->a_vp; 299 u_int32_t *tl; 300 caddr_t cp; 301 int32_t t1, t2; 302 caddr_t bpos, dpos, cp2; 303 int error = 0, attrflag, cachevalid; 304 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 305 u_int32_t mode, rmode; 306 int v3 = NFS_ISV3(vp); 307 struct nfsnode *np = VTONFS(vp); 308 309 cachevalid = (np->n_accstamp != -1 && 310 (time.tv_sec - np->n_accstamp) < NFS_ATTRTIMEO(np) && 311 np->n_accuid == ap->a_cred->cr_uid); 312 313 /* 314 * Check access cache first. If this request has been made for this 315 * uid shortly before, use the cached result. 316 */ 317 if (cachevalid) { 318 if (!np->n_accerror) { 319 if ((np->n_accmode & ap->a_mode) == ap->a_mode) 320 return np->n_accerror; 321 } else if ((np->n_accmode & ap->a_mode) == np->n_accmode) 322 return np->n_accerror; 323 } 324 325 /* 326 * For nfs v3, do an access rpc, otherwise you are stuck emulating 327 * ufs_access() locally using the vattr. This may not be correct, 328 * since the server may apply other access criteria such as 329 * client uid-->server uid mapping that we do not know about, but 330 * this is better than just returning anything that is lying about 331 * in the cache. 332 */ 333 if (v3) { 334 nfsstats.rpccnt[NFSPROC_ACCESS]++; 335 nfsm_reqhead(vp, NFSPROC_ACCESS, NFSX_FH(v3) + NFSX_UNSIGNED); 336 nfsm_fhtom(vp, v3); 337 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); 338 if (ap->a_mode & VREAD) 339 mode = NFSV3ACCESS_READ; 340 else 341 mode = 0; 342 if (vp->v_type != VDIR) { 343 if (ap->a_mode & VWRITE) 344 mode |= (NFSV3ACCESS_MODIFY | NFSV3ACCESS_EXTEND); 345 if (ap->a_mode & VEXEC) 346 mode |= NFSV3ACCESS_EXECUTE; 347 } else { 348 if (ap->a_mode & VWRITE) 349 mode |= (NFSV3ACCESS_MODIFY | NFSV3ACCESS_EXTEND | 350 NFSV3ACCESS_DELETE); 351 if (ap->a_mode & VEXEC) 352 mode |= NFSV3ACCESS_LOOKUP; 353 } 354 *tl = txdr_unsigned(mode); 355 nfsm_request(vp, NFSPROC_ACCESS, ap->a_p, ap->a_cred); 356 nfsm_postop_attr(vp, attrflag); 357 if (!error) { 358 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 359 rmode = fxdr_unsigned(u_int32_t, *tl); 360 /* 361 * The NFS V3 spec does not clarify whether or not 362 * the returned access bits can be a superset of 363 * the ones requested, so... 364 */ 365 if ((rmode & mode) != mode) 366 error = EACCES; 367 } 368 nfsm_reqdone; 369 } else 370 return (nfsspec_access(ap)); 371 /* 372 * Disallow write attempts on filesystems mounted read-only; 373 * unless the file is a socket, fifo, or a block or character 374 * device resident on the filesystem. 375 */ 376 if (!error && (ap->a_mode & VWRITE) && 377 (vp->v_mount->mnt_flag & MNT_RDONLY)) { 378 switch (vp->v_type) { 379 case VREG: 380 case VDIR: 381 case VLNK: 382 error = EROFS; 383 default: 384 break; 385 } 386 } 387 388 if (!error || error == EACCES) { 389 /* 390 * If we got the same result as for a previous, 391 * different request, OR it in. Don't update 392 * the timestamp in that case. 393 */ 394 if (cachevalid && error == np->n_accerror) { 395 if (!error) 396 np->n_accmode |= ap->a_mode; 397 else if ((np->n_accmode & ap->a_mode) == ap->a_mode) 398 np->n_accmode = ap->a_mode; 399 } else { 400 np->n_accstamp = time.tv_sec; 401 np->n_accuid = ap->a_cred->cr_uid; 402 np->n_accmode = ap->a_mode; 403 np->n_accerror = error; 404 } 405 } 406 407 return (error); 408 } 409 410 /* 411 * nfs open vnode op 412 * Check to see if the type is ok 413 * and that deletion is not in progress. 414 * For paged in text files, you will need to flush the page cache 415 * if consistency is lost. 416 */ 417 /* ARGSUSED */ 418 int 419 nfs_open(v) 420 void *v; 421 { 422 struct vop_open_args /* { 423 struct vnode *a_vp; 424 int a_mode; 425 struct ucred *a_cred; 426 struct proc *a_p; 427 } */ *ap = v; 428 struct vnode *vp = ap->a_vp; 429 struct nfsnode *np = VTONFS(vp); 430 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 431 struct vattr vattr; 432 int error; 433 434 if (vp->v_type != VREG && vp->v_type != VDIR && vp->v_type != VLNK) { 435 #ifdef DIAGNOSTIC 436 printf("open eacces vtyp=%d\n",vp->v_type); 437 #endif 438 return (EACCES); 439 } 440 /* 441 * Get a valid lease. If cached data is stale, flush it. 442 */ 443 if (nmp->nm_flag & NFSMNT_NQNFS) { 444 if (NQNFS_CKINVALID(vp, np, ND_READ)) { 445 do { 446 error = nqnfs_getlease(vp, ND_READ, ap->a_cred, 447 ap->a_p); 448 } while (error == NQNFS_EXPIRED); 449 if (error) 450 return (error); 451 if (np->n_lrev != np->n_brev || 452 (np->n_flag & NQNFSNONCACHE)) { 453 if ((error = nfs_vinvalbuf(vp, V_SAVE, ap->a_cred, 454 ap->a_p, 1)) == EINTR) 455 return (error); 456 (void) uvm_vnp_uncache(vp); 457 np->n_brev = np->n_lrev; 458 } 459 } 460 } else { 461 if (np->n_flag & NMODIFIED) { 462 if ((error = nfs_vinvalbuf(vp, V_SAVE, ap->a_cred, 463 ap->a_p, 1)) == EINTR) 464 return (error); 465 (void) uvm_vnp_uncache(vp); 466 np->n_attrstamp = 0; 467 if (vp->v_type == VDIR) { 468 nfs_invaldircache(vp, 0); 469 np->n_direofoffset = 0; 470 } 471 error = VOP_GETATTR(vp, &vattr, ap->a_cred, ap->a_p); 472 if (error) 473 return (error); 474 np->n_mtime = vattr.va_mtime.tv_sec; 475 } else { 476 error = VOP_GETATTR(vp, &vattr, ap->a_cred, ap->a_p); 477 if (error) 478 return (error); 479 if (np->n_mtime != vattr.va_mtime.tv_sec) { 480 if (vp->v_type == VDIR) { 481 nfs_invaldircache(vp, 0); 482 np->n_direofoffset = 0; 483 } 484 if ((error = nfs_vinvalbuf(vp, V_SAVE, 485 ap->a_cred, ap->a_p, 1)) == EINTR) 486 return (error); 487 (void) uvm_vnp_uncache(vp); 488 np->n_mtime = vattr.va_mtime.tv_sec; 489 } 490 } 491 } 492 if ((nmp->nm_flag & NFSMNT_NQNFS) == 0) 493 np->n_attrstamp = 0; /* For Open/Close consistency */ 494 return (0); 495 } 496 497 /* 498 * nfs close vnode op 499 * What an NFS client should do upon close after writing is a debatable issue. 500 * Most NFS clients push delayed writes to the server upon close, basically for 501 * two reasons: 502 * 1 - So that any write errors may be reported back to the client process 503 * doing the close system call. By far the two most likely errors are 504 * NFSERR_NOSPC and NFSERR_DQUOT to indicate space allocation failure. 505 * 2 - To put a worst case upper bound on cache inconsistency between 506 * multiple clients for the file. 507 * There is also a consistency problem for Version 2 of the protocol w.r.t. 508 * not being able to tell if other clients are writing a file concurrently, 509 * since there is no way of knowing if the changed modify time in the reply 510 * is only due to the write for this client. 511 * (NFS Version 3 provides weak cache consistency data in the reply that 512 * should be sufficient to detect and handle this case.) 513 * 514 * The current code does the following: 515 * for NFS Version 2 - play it safe and flush/invalidate all dirty buffers 516 * for NFS Version 3 - flush dirty buffers to the server but don't invalidate 517 * or commit them (this satisfies 1 and 2 except for the 518 * case where the server crashes after this close but 519 * before the commit RPC, which is felt to be "good 520 * enough". Changing the last argument to nfs_flush() to 521 * a 1 would force a commit operation, if it is felt a 522 * commit is necessary now. 523 * for NQNFS - do nothing now, since 2 is dealt with via leases and 524 * 1 should be dealt with via an fsync() system call for 525 * cases where write errors are important. 526 */ 527 /* ARGSUSED */ 528 int 529 nfs_close(v) 530 void *v; 531 { 532 struct vop_close_args /* { 533 struct vnodeop_desc *a_desc; 534 struct vnode *a_vp; 535 int a_fflag; 536 struct ucred *a_cred; 537 struct proc *a_p; 538 } */ *ap = v; 539 struct vnode *vp = ap->a_vp; 540 struct nfsnode *np = VTONFS(vp); 541 int error = 0; 542 543 if (vp->v_type == VREG) { 544 if ((VFSTONFS(vp->v_mount)->nm_flag & NFSMNT_NQNFS) == 0 && 545 (np->n_flag & NMODIFIED)) { 546 if (NFS_ISV3(vp)) { 547 error = nfs_flush(vp, ap->a_cred, MNT_WAIT, ap->a_p, 0); 548 np->n_flag &= ~NMODIFIED; 549 } else 550 error = nfs_vinvalbuf(vp, V_SAVE, ap->a_cred, ap->a_p, 1); 551 np->n_attrstamp = 0; 552 } 553 if (np->n_flag & NWRITEERR) { 554 np->n_flag &= ~NWRITEERR; 555 error = np->n_error; 556 } 557 } 558 return (error); 559 } 560 561 /* 562 * nfs getattr call from vfs. 563 */ 564 int 565 nfs_getattr(v) 566 void *v; 567 { 568 struct vop_getattr_args /* { 569 struct vnode *a_vp; 570 struct vattr *a_vap; 571 struct ucred *a_cred; 572 struct proc *a_p; 573 } */ *ap = v; 574 struct vnode *vp = ap->a_vp; 575 struct nfsnode *np = VTONFS(vp); 576 caddr_t cp; 577 u_int32_t *tl; 578 int32_t t1, t2; 579 caddr_t bpos, dpos; 580 int error = 0; 581 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 582 int v3 = NFS_ISV3(vp); 583 584 /* 585 * Update local times for special files. 586 */ 587 if (np->n_flag & (NACC | NUPD)) 588 np->n_flag |= NCHG; 589 /* 590 * First look in the cache. 591 */ 592 if (nfs_getattrcache(vp, ap->a_vap) == 0) 593 return (0); 594 nfsstats.rpccnt[NFSPROC_GETATTR]++; 595 nfsm_reqhead(vp, NFSPROC_GETATTR, NFSX_FH(v3)); 596 nfsm_fhtom(vp, v3); 597 nfsm_request(vp, NFSPROC_GETATTR, ap->a_p, ap->a_cred); 598 if (!error) { 599 nfsm_loadattr(vp, ap->a_vap); 600 if (vp->v_type == VDIR && 601 ap->a_vap->va_blocksize < NFS_DIRFRAGSIZ) 602 ap->a_vap->va_blocksize = NFS_DIRFRAGSIZ; 603 } 604 nfsm_reqdone; 605 return (error); 606 } 607 608 /* 609 * nfs setattr call. 610 */ 611 int 612 nfs_setattr(v) 613 void *v; 614 { 615 struct vop_setattr_args /* { 616 struct vnodeop_desc *a_desc; 617 struct vnode *a_vp; 618 struct vattr *a_vap; 619 struct ucred *a_cred; 620 struct proc *a_p; 621 } */ *ap = v; 622 struct vnode *vp = ap->a_vp; 623 struct nfsnode *np = VTONFS(vp); 624 struct vattr *vap = ap->a_vap; 625 int error = 0; 626 u_quad_t tsize = 0; 627 628 /* 629 * Setting of flags is not supported. 630 */ 631 if (vap->va_flags != VNOVAL) 632 return (EOPNOTSUPP); 633 634 /* 635 * Disallow write attempts if the filesystem is mounted read-only. 636 */ 637 if ((vap->va_uid != (uid_t)VNOVAL || 638 vap->va_gid != (gid_t)VNOVAL || vap->va_atime.tv_sec != VNOVAL || 639 vap->va_mtime.tv_sec != VNOVAL || vap->va_mode != (mode_t)VNOVAL) && 640 (vp->v_mount->mnt_flag & MNT_RDONLY)) 641 return (EROFS); 642 if (vap->va_size != VNOVAL) { 643 switch (vp->v_type) { 644 case VDIR: 645 return (EISDIR); 646 case VCHR: 647 case VBLK: 648 case VSOCK: 649 case VFIFO: 650 if (vap->va_mtime.tv_sec == VNOVAL && 651 vap->va_atime.tv_sec == VNOVAL && 652 vap->va_mode == (mode_t)VNOVAL && 653 vap->va_uid == (uid_t)VNOVAL && 654 vap->va_gid == (gid_t)VNOVAL) 655 return (0); 656 vap->va_size = VNOVAL; 657 break; 658 default: 659 /* 660 * Disallow write attempts if the filesystem is 661 * mounted read-only. 662 */ 663 if (vp->v_mount->mnt_flag & MNT_RDONLY) 664 return (EROFS); 665 uvm_vnp_setsize(vp, vap->va_size); 666 if (vap->va_size == 0) 667 error = nfs_vinvalbuf(vp, 0, 668 ap->a_cred, ap->a_p, 1); 669 else 670 error = nfs_vinvalbuf(vp, V_SAVE, 671 ap->a_cred, ap->a_p, 1); 672 if (error) { 673 uvm_vnp_setsize(vp, np->n_size); 674 return (error); 675 } 676 tsize = np->n_size; 677 np->n_size = np->n_vattr->va_size = vap->va_size; 678 } 679 } else if ((vap->va_mtime.tv_sec != VNOVAL || 680 vap->va_atime.tv_sec != VNOVAL) && 681 vp->v_type == VREG && 682 (error = nfs_vinvalbuf(vp, V_SAVE, ap->a_cred, 683 ap->a_p, 1)) == EINTR) 684 return (error); 685 error = nfs_setattrrpc(vp, vap, ap->a_cred, ap->a_p); 686 if (error && vap->va_size != VNOVAL) { 687 np->n_size = np->n_vattr->va_size = tsize; 688 uvm_vnp_setsize(vp, np->n_size); 689 } 690 return (error); 691 } 692 693 /* 694 * Do an nfs setattr rpc. 695 */ 696 int 697 nfs_setattrrpc(vp, vap, cred, procp) 698 struct vnode *vp; 699 struct vattr *vap; 700 struct ucred *cred; 701 struct proc *procp; 702 { 703 struct nfsv2_sattr *sp; 704 caddr_t cp; 705 int32_t t1, t2; 706 caddr_t bpos, dpos, cp2; 707 u_int32_t *tl; 708 int error = 0, wccflag = NFSV3_WCCRATTR; 709 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 710 int v3 = NFS_ISV3(vp); 711 712 nfsstats.rpccnt[NFSPROC_SETATTR]++; 713 nfsm_reqhead(vp, NFSPROC_SETATTR, NFSX_FH(v3) + NFSX_SATTR(v3)); 714 nfsm_fhtom(vp, v3); 715 if (v3) { 716 nfsm_v3attrbuild(vap, TRUE); 717 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); 718 *tl = nfs_false; 719 } else { 720 nfsm_build(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 721 if (vap->va_mode == (mode_t)VNOVAL) 722 sp->sa_mode = nfs_xdrneg1; 723 else 724 sp->sa_mode = vtonfsv2_mode(vp->v_type, vap->va_mode); 725 if (vap->va_uid == (uid_t)VNOVAL) 726 sp->sa_uid = nfs_xdrneg1; 727 else 728 sp->sa_uid = txdr_unsigned(vap->va_uid); 729 if (vap->va_gid == (gid_t)VNOVAL) 730 sp->sa_gid = nfs_xdrneg1; 731 else 732 sp->sa_gid = txdr_unsigned(vap->va_gid); 733 sp->sa_size = txdr_unsigned(vap->va_size); 734 txdr_nfsv2time(&vap->va_atime, &sp->sa_atime); 735 txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime); 736 } 737 nfsm_request(vp, NFSPROC_SETATTR, procp, cred); 738 if (v3) { 739 nfsm_wcc_data(vp, wccflag); 740 } else 741 nfsm_loadattr(vp, (struct vattr *)0); 742 nfsm_reqdone; 743 return (error); 744 } 745 746 /* 747 * nfs lookup call, one step at a time... 748 * First look in cache 749 * If not found, unlock the directory nfsnode and do the rpc 750 */ 751 int 752 nfs_lookup(v) 753 void *v; 754 { 755 struct vop_lookup_args /* { 756 struct vnodeop_desc *a_desc; 757 struct vnode *a_dvp; 758 struct vnode **a_vpp; 759 struct componentname *a_cnp; 760 } */ *ap = v; 761 struct componentname *cnp = ap->a_cnp; 762 struct vnode *dvp = ap->a_dvp; 763 struct vnode **vpp = ap->a_vpp; 764 int flags; 765 struct vnode *newvp; 766 u_int32_t *tl; 767 caddr_t cp; 768 int32_t t1, t2; 769 struct nfsmount *nmp; 770 caddr_t bpos, dpos, cp2; 771 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 772 long len; 773 nfsfh_t *fhp; 774 struct nfsnode *np; 775 int lockparent, wantparent, error = 0, attrflag, fhsize; 776 int v3 = NFS_ISV3(dvp); 777 cnp->cn_flags &= ~PDIRUNLOCK; 778 flags = cnp->cn_flags; 779 780 *vpp = NULLVP; 781 if ((flags & ISLASTCN) && (dvp->v_mount->mnt_flag & MNT_RDONLY) && 782 (cnp->cn_nameiop == DELETE || cnp->cn_nameiop == RENAME)) 783 return (EROFS); 784 if (dvp->v_type != VDIR) 785 return (ENOTDIR); 786 787 lockparent = flags & LOCKPARENT; 788 wantparent = flags & (LOCKPARENT|WANTPARENT); 789 nmp = VFSTONFS(dvp->v_mount); 790 np = VTONFS(dvp); 791 792 /* 793 * Before tediously performing a linear scan of the directory, 794 * check the name cache to see if the directory/name pair 795 * we are looking for is known already. 796 * If the directory/name pair is found in the name cache, 797 * we have to ensure the directory has not changed from 798 * the time the cache entry has been created. If it has, 799 * the cache entry has to be ignored 800 */ 801 if ((error = cache_lookup(dvp, vpp, cnp)) >= 0) { 802 struct vattr vattr; 803 int err2; 804 805 if (error && error != ENOENT) { 806 *vpp = NULLVP; 807 return (error); 808 } 809 810 err2 = VOP_ACCESS(dvp, VEXEC, cnp->cn_cred, cnp->cn_proc); 811 if (err2) { 812 *vpp = NULLVP; 813 return (err2); 814 } 815 816 if (error == ENOENT) { 817 if (!VOP_GETATTR(dvp, &vattr, cnp->cn_cred, 818 cnp->cn_proc) && vattr.va_mtime.tv_sec == 819 VTONFS(dvp)->n_nctime) 820 return (ENOENT); 821 cache_purge(dvp); 822 np->n_nctime = 0; 823 goto dorpc; 824 } else if (error > 0) { 825 *vpp = NULLVP; 826 return error; 827 } 828 829 newvp = *vpp; 830 if (!VOP_GETATTR(newvp, &vattr, cnp->cn_cred, cnp->cn_proc) 831 && vattr.va_ctime.tv_sec == VTONFS(newvp)->n_ctime) 832 { 833 nfsstats.lookupcache_hits++; 834 if (cnp->cn_nameiop != LOOKUP && (flags & ISLASTCN)) 835 cnp->cn_flags |= SAVENAME; 836 return (0); 837 } 838 /* XXX cache_lookup() returns the vnode locked; if nfs 839 * would have real vnode locking, we should call VOP_UNLOCK() 840 * here; as it has no real locking, don't bother to do 841 * anything */ 842 /* VOP_UNLOCK(newvp, 0); */ 843 cache_purge(newvp); 844 vrele(newvp); 845 *vpp = NULLVP; 846 } 847 dorpc: 848 error = 0; 849 newvp = NULLVP; 850 nfsstats.lookupcache_misses++; 851 nfsstats.rpccnt[NFSPROC_LOOKUP]++; 852 len = cnp->cn_namelen; 853 nfsm_reqhead(dvp, NFSPROC_LOOKUP, 854 NFSX_FH(v3) + NFSX_UNSIGNED + nfsm_rndup(len)); 855 nfsm_fhtom(dvp, v3); 856 nfsm_strtom(cnp->cn_nameptr, len, NFS_MAXNAMLEN); 857 nfsm_request(dvp, NFSPROC_LOOKUP, cnp->cn_proc, cnp->cn_cred); 858 if (error) { 859 nfsm_postop_attr(dvp, attrflag); 860 m_freem(mrep); 861 goto nfsmout; 862 } 863 nfsm_getfh(fhp, fhsize, v3); 864 865 /* 866 * Handle RENAME case... 867 */ 868 if (cnp->cn_nameiop == RENAME && wantparent && (flags & ISLASTCN)) { 869 if (NFS_CMPFH(np, fhp, fhsize)) { 870 m_freem(mrep); 871 return (EISDIR); 872 } 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 if (v3) { 880 nfsm_postop_attr(newvp, attrflag); 881 nfsm_postop_attr(dvp, attrflag); 882 } else 883 nfsm_loadattr(newvp, (struct vattr *)0); 884 *vpp = newvp; 885 m_freem(mrep); 886 cnp->cn_flags |= SAVENAME; 887 if (!lockparent || !(flags & ISLASTCN)) 888 cnp->cn_flags |= PDIRUNLOCK; 889 return (0); 890 } 891 892 if (NFS_CMPFH(np, fhp, fhsize)) { 893 VREF(dvp); 894 newvp = dvp; 895 } else { 896 error = nfs_nget(dvp->v_mount, fhp, fhsize, &np); 897 if (error) { 898 m_freem(mrep); 899 return (error); 900 } 901 newvp = NFSTOV(np); 902 } 903 if (v3) { 904 nfsm_postop_attr(newvp, attrflag); 905 nfsm_postop_attr(dvp, attrflag); 906 } else 907 nfsm_loadattr(newvp, (struct vattr *)0); 908 if (cnp->cn_nameiop != LOOKUP && (flags & ISLASTCN)) 909 cnp->cn_flags |= SAVENAME; 910 if ((cnp->cn_flags & MAKEENTRY) && 911 (cnp->cn_nameiop != DELETE || !(flags & ISLASTCN))) { 912 np->n_ctime = np->n_vattr->va_ctime.tv_sec; 913 cache_enter(dvp, newvp, cnp); 914 } 915 *vpp = newvp; 916 nfsm_reqdone; 917 if (error) { 918 if (error == ENOENT && (cnp->cn_flags & MAKEENTRY) && 919 cnp->cn_nameiop != CREATE) { 920 if (VTONFS(dvp)->n_nctime == 0) 921 VTONFS(dvp)->n_nctime = 922 VTONFS(dvp)->n_vattr->va_mtime.tv_sec; 923 cache_enter(dvp, NULL, cnp); 924 } 925 if (newvp != NULLVP) 926 vrele(newvp); 927 if ((cnp->cn_nameiop == CREATE || cnp->cn_nameiop == RENAME) && 928 (flags & ISLASTCN) && error == ENOENT) { 929 if (dvp->v_mount->mnt_flag & MNT_RDONLY) 930 error = EROFS; 931 else 932 error = EJUSTRETURN; 933 } 934 if (cnp->cn_nameiop != LOOKUP && (flags & ISLASTCN)) 935 cnp->cn_flags |= SAVENAME; 936 } else { 937 if (!lockparent || !(flags & ISLASTCN)) 938 cnp->cn_flags |= PDIRUNLOCK; 939 } 940 return (error); 941 } 942 943 /* 944 * nfs read call. 945 * Just call nfs_bioread() to do the work. 946 */ 947 int 948 nfs_read(v) 949 void *v; 950 { 951 struct vop_read_args /* { 952 struct vnode *a_vp; 953 struct uio *a_uio; 954 int a_ioflag; 955 struct ucred *a_cred; 956 } */ *ap = v; 957 struct vnode *vp = ap->a_vp; 958 959 if (vp->v_type != VREG) 960 return (EPERM); 961 return (nfs_bioread(vp, ap->a_uio, ap->a_ioflag, ap->a_cred, 0)); 962 } 963 964 /* 965 * nfs readlink call 966 */ 967 int 968 nfs_readlink(v) 969 void *v; 970 { 971 struct vop_readlink_args /* { 972 struct vnode *a_vp; 973 struct uio *a_uio; 974 struct ucred *a_cred; 975 } */ *ap = v; 976 struct vnode *vp = ap->a_vp; 977 978 if (vp->v_type != VLNK) 979 return (EPERM); 980 return (nfs_bioread(vp, ap->a_uio, 0, ap->a_cred, 0)); 981 } 982 983 /* 984 * Do a readlink rpc. 985 * Called by nfs_doio() from below the buffer cache. 986 */ 987 int 988 nfs_readlinkrpc(vp, uiop, cred) 989 struct vnode *vp; 990 struct uio *uiop; 991 struct ucred *cred; 992 { 993 u_int32_t *tl; 994 caddr_t cp; 995 int32_t t1, t2; 996 caddr_t bpos, dpos, cp2; 997 int error = 0, len, attrflag; 998 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 999 int v3 = NFS_ISV3(vp); 1000 1001 nfsstats.rpccnt[NFSPROC_READLINK]++; 1002 nfsm_reqhead(vp, NFSPROC_READLINK, NFSX_FH(v3)); 1003 nfsm_fhtom(vp, v3); 1004 nfsm_request(vp, NFSPROC_READLINK, uiop->uio_procp, cred); 1005 if (v3) 1006 nfsm_postop_attr(vp, attrflag); 1007 if (!error) { 1008 nfsm_strsiz(len, NFS_MAXPATHLEN); 1009 nfsm_mtouio(uiop, len); 1010 } 1011 nfsm_reqdone; 1012 return (error); 1013 } 1014 1015 /* 1016 * nfs read rpc call 1017 * Ditto above 1018 */ 1019 int 1020 nfs_readrpc(vp, uiop, cred) 1021 struct vnode *vp; 1022 struct uio *uiop; 1023 struct ucred *cred; 1024 { 1025 u_int32_t *tl; 1026 caddr_t cp; 1027 int32_t t1, t2; 1028 caddr_t bpos, dpos, cp2; 1029 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 1030 struct nfsmount *nmp; 1031 int error = 0, len, retlen, tsiz, eof, attrflag; 1032 int v3 = NFS_ISV3(vp); 1033 1034 #ifndef nolint 1035 eof = 0; 1036 #endif 1037 nmp = VFSTONFS(vp->v_mount); 1038 tsiz = uiop->uio_resid; 1039 if (uiop->uio_offset + tsiz > nmp->nm_maxfilesize) 1040 return (EFBIG); 1041 while (tsiz > 0) { 1042 nfsstats.rpccnt[NFSPROC_READ]++; 1043 len = (tsiz > nmp->nm_rsize) ? nmp->nm_rsize : tsiz; 1044 nfsm_reqhead(vp, NFSPROC_READ, NFSX_FH(v3) + NFSX_UNSIGNED * 3); 1045 nfsm_fhtom(vp, v3); 1046 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED * 3); 1047 if (v3) { 1048 txdr_hyper(uiop->uio_offset, tl); 1049 *(tl + 2) = txdr_unsigned(len); 1050 } else { 1051 *tl++ = txdr_unsigned(uiop->uio_offset); 1052 *tl++ = txdr_unsigned(len); 1053 *tl = 0; 1054 } 1055 nfsm_request(vp, NFSPROC_READ, uiop->uio_procp, cred); 1056 if (v3) { 1057 nfsm_postop_attr(vp, attrflag); 1058 if (error) { 1059 m_freem(mrep); 1060 goto nfsmout; 1061 } 1062 nfsm_dissect(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 1063 eof = fxdr_unsigned(int, *(tl + 1)); 1064 } else 1065 nfsm_loadattr(vp, (struct vattr *)0); 1066 nfsm_strsiz(retlen, nmp->nm_rsize); 1067 nfsm_mtouio(uiop, retlen); 1068 m_freem(mrep); 1069 tsiz -= retlen; 1070 if (v3) { 1071 if (eof || retlen == 0) 1072 tsiz = 0; 1073 } else if (retlen < len) 1074 tsiz = 0; 1075 } 1076 nfsmout: 1077 return (error); 1078 } 1079 1080 /* 1081 * nfs write call 1082 */ 1083 int 1084 nfs_writerpc(vp, uiop, cred, iomode, must_commit) 1085 struct vnode *vp; 1086 struct uio *uiop; 1087 struct ucred *cred; 1088 int *iomode, *must_commit; 1089 { 1090 u_int32_t *tl; 1091 caddr_t cp; 1092 int32_t t1, t2, backup; 1093 caddr_t bpos, dpos, cp2; 1094 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 1095 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 1096 int error = 0, len, tsiz, wccflag = NFSV3_WCCRATTR, rlen, commit; 1097 int v3 = NFS_ISV3(vp), committed = NFSV3WRITE_FILESYNC; 1098 1099 #ifndef DIAGNOSTIC 1100 if (uiop->uio_iovcnt != 1) 1101 panic("nfs: writerpc iovcnt > 1"); 1102 #endif 1103 *must_commit = 0; 1104 tsiz = uiop->uio_resid; 1105 if (uiop->uio_offset + tsiz > nmp->nm_maxfilesize) 1106 return (EFBIG); 1107 while (tsiz > 0) { 1108 nfsstats.rpccnt[NFSPROC_WRITE]++; 1109 len = (tsiz > nmp->nm_wsize) ? nmp->nm_wsize : tsiz; 1110 nfsm_reqhead(vp, NFSPROC_WRITE, 1111 NFSX_FH(v3) + 5 * NFSX_UNSIGNED + nfsm_rndup(len)); 1112 nfsm_fhtom(vp, v3); 1113 if (v3) { 1114 nfsm_build(tl, u_int32_t *, 5 * NFSX_UNSIGNED); 1115 txdr_hyper(uiop->uio_offset, tl); 1116 tl += 2; 1117 *tl++ = txdr_unsigned(len); 1118 *tl++ = txdr_unsigned(*iomode); 1119 *tl = txdr_unsigned(len); 1120 } else { 1121 u_int32_t x; 1122 1123 nfsm_build(tl, u_int32_t *, 4 * NFSX_UNSIGNED); 1124 /* Set both "begin" and "current" to non-garbage. */ 1125 x = txdr_unsigned((u_int32_t)uiop->uio_offset); 1126 *tl++ = x; /* "begin offset" */ 1127 *tl++ = x; /* "current offset" */ 1128 x = txdr_unsigned(len); 1129 *tl++ = x; /* total to this offset */ 1130 *tl = x; /* size of this write */ 1131 1132 } 1133 nfsm_uiotom(uiop, len); 1134 nfsm_request(vp, NFSPROC_WRITE, uiop->uio_procp, cred); 1135 if (v3) { 1136 wccflag = NFSV3_WCCCHK; 1137 nfsm_wcc_data(vp, wccflag); 1138 if (!error) { 1139 nfsm_dissect(tl, u_int32_t *, 2 * NFSX_UNSIGNED 1140 + NFSX_V3WRITEVERF); 1141 rlen = fxdr_unsigned(int, *tl++); 1142 if (rlen == 0) { 1143 error = NFSERR_IO; 1144 m_freem(mrep); 1145 break; 1146 } else if (rlen < len) { 1147 backup = len - rlen; 1148 (caddr_t)uiop->uio_iov->iov_base -= 1149 backup; 1150 uiop->uio_iov->iov_len += backup; 1151 uiop->uio_offset -= backup; 1152 uiop->uio_resid += backup; 1153 len = rlen; 1154 } 1155 commit = fxdr_unsigned(int, *tl++); 1156 1157 /* 1158 * Return the lowest committment level 1159 * obtained by any of the RPCs. 1160 */ 1161 if (committed == NFSV3WRITE_FILESYNC) 1162 committed = commit; 1163 else if (committed == NFSV3WRITE_DATASYNC && 1164 commit == NFSV3WRITE_UNSTABLE) 1165 committed = commit; 1166 if ((nmp->nm_iflag & NFSMNT_HASWRITEVERF) == 0){ 1167 memcpy((caddr_t)nmp->nm_verf, (caddr_t)tl, 1168 NFSX_V3WRITEVERF); 1169 nmp->nm_iflag |= NFSMNT_HASWRITEVERF; 1170 } else if (memcmp((caddr_t)tl, 1171 (caddr_t)nmp->nm_verf, NFSX_V3WRITEVERF)) { 1172 *must_commit = 1; 1173 memcpy((caddr_t)nmp->nm_verf, (caddr_t)tl, 1174 NFSX_V3WRITEVERF); 1175 } 1176 } 1177 } else 1178 nfsm_loadattr(vp, (struct vattr *)0); 1179 if (wccflag) 1180 VTONFS(vp)->n_mtime = VTONFS(vp)->n_vattr->va_mtime.tv_sec; 1181 m_freem(mrep); 1182 if (error) 1183 break; 1184 tsiz -= len; 1185 } 1186 nfsmout: 1187 *iomode = committed; 1188 if (error) 1189 uiop->uio_resid = tsiz; 1190 return (error); 1191 } 1192 1193 /* 1194 * nfs mknod rpc 1195 * For NFS v2 this is a kludge. Use a create rpc but with the IFMT bits of the 1196 * mode set to specify the file type and the size field for rdev. 1197 */ 1198 int 1199 nfs_mknodrpc(dvp, vpp, cnp, vap) 1200 struct vnode *dvp; 1201 struct vnode **vpp; 1202 struct componentname *cnp; 1203 struct vattr *vap; 1204 { 1205 struct nfsv2_sattr *sp; 1206 u_int32_t *tl; 1207 caddr_t cp; 1208 int32_t t1, t2; 1209 struct vnode *newvp = (struct vnode *)0; 1210 struct nfsnode *np; 1211 char *cp2; 1212 caddr_t bpos, dpos; 1213 int error = 0, wccflag = NFSV3_WCCRATTR, gotvp = 0; 1214 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 1215 u_int32_t rdev; 1216 int v3 = NFS_ISV3(dvp); 1217 1218 if (vap->va_type == VCHR || vap->va_type == VBLK) 1219 rdev = txdr_unsigned(vap->va_rdev); 1220 else if (vap->va_type == VFIFO || vap->va_type == VSOCK) 1221 rdev = nfs_xdrneg1; 1222 else { 1223 VOP_ABORTOP(dvp, cnp); 1224 vput(dvp); 1225 return (EOPNOTSUPP); 1226 } 1227 nfsstats.rpccnt[NFSPROC_MKNOD]++; 1228 nfsm_reqhead(dvp, NFSPROC_MKNOD, NFSX_FH(v3) + 4 * NFSX_UNSIGNED + 1229 + nfsm_rndup(cnp->cn_namelen) + NFSX_SATTR(v3)); 1230 nfsm_fhtom(dvp, v3); 1231 nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN); 1232 if (v3) { 1233 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); 1234 *tl++ = vtonfsv3_type(vap->va_type); 1235 nfsm_v3attrbuild(vap, FALSE); 1236 if (vap->va_type == VCHR || vap->va_type == VBLK) { 1237 nfsm_build(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 1238 *tl++ = txdr_unsigned(major(vap->va_rdev)); 1239 *tl = txdr_unsigned(minor(vap->va_rdev)); 1240 } 1241 } else { 1242 nfsm_build(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 1243 sp->sa_mode = vtonfsv2_mode(vap->va_type, vap->va_mode); 1244 sp->sa_uid = nfs_xdrneg1; 1245 sp->sa_gid = nfs_xdrneg1; 1246 sp->sa_size = rdev; 1247 txdr_nfsv2time(&vap->va_atime, &sp->sa_atime); 1248 txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime); 1249 } 1250 nfsm_request(dvp, NFSPROC_MKNOD, cnp->cn_proc, cnp->cn_cred); 1251 if (!error) { 1252 nfsm_mtofh(dvp, newvp, v3, gotvp); 1253 if (!gotvp) { 1254 if (newvp) { 1255 vrele(newvp); 1256 newvp = (struct vnode *)0; 1257 } 1258 error = nfs_lookitup(dvp, cnp->cn_nameptr, 1259 cnp->cn_namelen, cnp->cn_cred, cnp->cn_proc, &np); 1260 if (!error) 1261 newvp = NFSTOV(np); 1262 } 1263 } 1264 if (v3) 1265 nfsm_wcc_data(dvp, wccflag); 1266 nfsm_reqdone; 1267 if (error) { 1268 if (newvp) 1269 vrele(newvp); 1270 } else { 1271 if (cnp->cn_flags & MAKEENTRY) 1272 cache_enter(dvp, newvp, cnp); 1273 *vpp = newvp; 1274 } 1275 FREE(cnp->cn_pnbuf, M_NAMEI); 1276 VTONFS(dvp)->n_flag |= NMODIFIED; 1277 if (!wccflag) 1278 VTONFS(dvp)->n_attrstamp = 0; 1279 vrele(dvp); 1280 return (error); 1281 } 1282 1283 /* 1284 * nfs mknod vop 1285 * just call nfs_mknodrpc() to do the work. 1286 */ 1287 /* ARGSUSED */ 1288 int 1289 nfs_mknod(v) 1290 void *v; 1291 { 1292 struct vop_mknod_args /* { 1293 struct vnode *a_dvp; 1294 struct vnode **a_vpp; 1295 struct componentname *a_cnp; 1296 struct vattr *a_vap; 1297 } */ *ap = v; 1298 struct vnode *newvp; 1299 int error; 1300 1301 error = nfs_mknodrpc(ap->a_dvp, &newvp, ap->a_cnp, ap->a_vap); 1302 if (!error) 1303 vrele(newvp); 1304 return (error); 1305 } 1306 1307 static u_long create_verf; 1308 /* 1309 * nfs file create call 1310 */ 1311 int 1312 nfs_create(v) 1313 void *v; 1314 { 1315 struct vop_create_args /* { 1316 struct vnode *a_dvp; 1317 struct vnode **a_vpp; 1318 struct componentname *a_cnp; 1319 struct vattr *a_vap; 1320 } */ *ap = v; 1321 struct vnode *dvp = ap->a_dvp; 1322 struct vattr *vap = ap->a_vap; 1323 struct componentname *cnp = ap->a_cnp; 1324 struct nfsv2_sattr *sp; 1325 u_int32_t *tl; 1326 caddr_t cp; 1327 int32_t t1, t2; 1328 struct nfsnode *np = (struct nfsnode *)0; 1329 struct vnode *newvp = (struct vnode *)0; 1330 caddr_t bpos, dpos, cp2; 1331 int error, wccflag = NFSV3_WCCRATTR, gotvp = 0, fmode = 0; 1332 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 1333 int v3 = NFS_ISV3(dvp); 1334 1335 /* 1336 * Oops, not for me.. 1337 */ 1338 if (vap->va_type == VSOCK) 1339 return (nfs_mknodrpc(dvp, ap->a_vpp, cnp, vap)); 1340 1341 #ifdef VA_EXCLUSIVE 1342 if (vap->va_vaflags & VA_EXCLUSIVE) 1343 fmode |= O_EXCL; 1344 #endif 1345 again: 1346 error = 0; 1347 nfsstats.rpccnt[NFSPROC_CREATE]++; 1348 nfsm_reqhead(dvp, NFSPROC_CREATE, NFSX_FH(v3) + 2 * NFSX_UNSIGNED + 1349 nfsm_rndup(cnp->cn_namelen) + NFSX_SATTR(v3)); 1350 nfsm_fhtom(dvp, v3); 1351 nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN); 1352 if (v3) { 1353 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); 1354 if (fmode & O_EXCL) { 1355 *tl = txdr_unsigned(NFSV3CREATE_EXCLUSIVE); 1356 nfsm_build(tl, u_int32_t *, NFSX_V3CREATEVERF); 1357 if (in_ifaddr.tqh_first) 1358 *tl++ = in_ifaddr.tqh_first->ia_addr.sin_addr.s_addr; 1359 else 1360 *tl++ = create_verf; 1361 *tl = ++create_verf; 1362 } else { 1363 *tl = txdr_unsigned(NFSV3CREATE_UNCHECKED); 1364 nfsm_v3attrbuild(vap, FALSE); 1365 } 1366 } else { 1367 nfsm_build(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 1368 sp->sa_mode = vtonfsv2_mode(vap->va_type, vap->va_mode); 1369 sp->sa_uid = nfs_xdrneg1; 1370 sp->sa_gid = nfs_xdrneg1; 1371 sp->sa_size = 0; 1372 txdr_nfsv2time(&vap->va_atime, &sp->sa_atime); 1373 txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime); 1374 } 1375 nfsm_request(dvp, NFSPROC_CREATE, cnp->cn_proc, cnp->cn_cred); 1376 if (!error) { 1377 nfsm_mtofh(dvp, newvp, v3, gotvp); 1378 if (!gotvp) { 1379 if (newvp) { 1380 vrele(newvp); 1381 newvp = (struct vnode *)0; 1382 } 1383 error = nfs_lookitup(dvp, cnp->cn_nameptr, 1384 cnp->cn_namelen, cnp->cn_cred, cnp->cn_proc, &np); 1385 if (!error) 1386 newvp = NFSTOV(np); 1387 } 1388 } 1389 if (v3) 1390 nfsm_wcc_data(dvp, wccflag); 1391 nfsm_reqdone; 1392 if (error) { 1393 if (v3 && (fmode & O_EXCL) && error == NFSERR_NOTSUPP) { 1394 fmode &= ~O_EXCL; 1395 goto again; 1396 } 1397 if (newvp) 1398 vrele(newvp); 1399 } else if (v3 && (fmode & O_EXCL)) 1400 error = nfs_setattrrpc(newvp, vap, cnp->cn_cred, cnp->cn_proc); 1401 if (!error) { 1402 if (cnp->cn_flags & MAKEENTRY) 1403 cache_enter(dvp, newvp, cnp); 1404 *ap->a_vpp = newvp; 1405 } 1406 FREE(cnp->cn_pnbuf, M_NAMEI); 1407 VTONFS(dvp)->n_flag |= NMODIFIED; 1408 if (!wccflag) 1409 VTONFS(dvp)->n_attrstamp = 0; 1410 vrele(dvp); 1411 return (error); 1412 } 1413 1414 /* 1415 * nfs file remove call 1416 * To try and make nfs semantics closer to ufs semantics, a file that has 1417 * other processes using the vnode is renamed instead of removed and then 1418 * removed later on the last close. 1419 * - If v_usecount > 1 1420 * If a rename is not already in the works 1421 * call nfs_sillyrename() to set it up 1422 * else 1423 * do the remove rpc 1424 */ 1425 int 1426 nfs_remove(v) 1427 void *v; 1428 { 1429 struct vop_remove_args /* { 1430 struct vnodeop_desc *a_desc; 1431 struct vnode * a_dvp; 1432 struct vnode * a_vp; 1433 struct componentname * a_cnp; 1434 } */ *ap = v; 1435 struct vnode *vp = ap->a_vp; 1436 struct vnode *dvp = ap->a_dvp; 1437 struct componentname *cnp = ap->a_cnp; 1438 struct nfsnode *np = VTONFS(vp); 1439 int error = 0; 1440 struct vattr vattr; 1441 1442 #ifndef DIAGNOSTIC 1443 if ((cnp->cn_flags & HASBUF) == 0) 1444 panic("nfs_remove: no name"); 1445 if (vp->v_usecount < 1) 1446 panic("nfs_remove: bad v_usecount"); 1447 #endif 1448 if (vp->v_type == VDIR) 1449 error = EPERM; 1450 else if (vp->v_usecount == 1 || (np->n_sillyrename && 1451 VOP_GETATTR(vp, &vattr, cnp->cn_cred, cnp->cn_proc) == 0 && 1452 vattr.va_nlink > 1)) { 1453 /* 1454 * Purge the name cache so that the chance of a lookup for 1455 * the name succeeding while the remove is in progress is 1456 * minimized. Without node locking it can still happen, such 1457 * that an I/O op returns ESTALE, but since you get this if 1458 * another host removes the file.. 1459 */ 1460 cache_purge(vp); 1461 /* 1462 * throw away biocache buffers, mainly to avoid 1463 * unnecessary delayed writes later. 1464 */ 1465 error = nfs_vinvalbuf(vp, 0, cnp->cn_cred, cnp->cn_proc, 1); 1466 /* Do the rpc */ 1467 if (error != EINTR) 1468 error = nfs_removerpc(dvp, cnp->cn_nameptr, 1469 cnp->cn_namelen, cnp->cn_cred, cnp->cn_proc); 1470 /* 1471 * Kludge City: If the first reply to the remove rpc is lost.. 1472 * the reply to the retransmitted request will be ENOENT 1473 * since the file was in fact removed 1474 * Therefore, we cheat and return success. 1475 */ 1476 if (error == ENOENT) 1477 error = 0; 1478 } else if (!np->n_sillyrename) 1479 error = nfs_sillyrename(dvp, vp, cnp); 1480 FREE(cnp->cn_pnbuf, M_NAMEI); 1481 np->n_attrstamp = 0; 1482 vrele(dvp); 1483 vrele(vp); 1484 return (error); 1485 } 1486 1487 /* 1488 * nfs file remove rpc called from nfs_inactive 1489 */ 1490 int 1491 nfs_removeit(sp) 1492 struct sillyrename *sp; 1493 { 1494 1495 return (nfs_removerpc(sp->s_dvp, sp->s_name, sp->s_namlen, sp->s_cred, 1496 (struct proc *)0)); 1497 } 1498 1499 /* 1500 * Nfs remove rpc, called from nfs_remove() and nfs_removeit(). 1501 */ 1502 int 1503 nfs_removerpc(dvp, name, namelen, cred, proc) 1504 struct vnode *dvp; 1505 const char *name; 1506 int namelen; 1507 struct ucred *cred; 1508 struct proc *proc; 1509 { 1510 u_int32_t *tl; 1511 caddr_t cp; 1512 int32_t t1, t2; 1513 caddr_t bpos, dpos, cp2; 1514 int error = 0, wccflag = NFSV3_WCCRATTR; 1515 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 1516 int v3 = NFS_ISV3(dvp); 1517 1518 nfsstats.rpccnt[NFSPROC_REMOVE]++; 1519 nfsm_reqhead(dvp, NFSPROC_REMOVE, 1520 NFSX_FH(v3) + NFSX_UNSIGNED + nfsm_rndup(namelen)); 1521 nfsm_fhtom(dvp, v3); 1522 nfsm_strtom(name, namelen, NFS_MAXNAMLEN); 1523 nfsm_request(dvp, NFSPROC_REMOVE, proc, cred); 1524 if (v3) 1525 nfsm_wcc_data(dvp, wccflag); 1526 nfsm_reqdone; 1527 VTONFS(dvp)->n_flag |= NMODIFIED; 1528 if (!wccflag) 1529 VTONFS(dvp)->n_attrstamp = 0; 1530 return (error); 1531 } 1532 1533 /* 1534 * nfs file rename call 1535 */ 1536 int 1537 nfs_rename(v) 1538 void *v; 1539 { 1540 struct vop_rename_args /* { 1541 struct vnode *a_fdvp; 1542 struct vnode *a_fvp; 1543 struct componentname *a_fcnp; 1544 struct vnode *a_tdvp; 1545 struct vnode *a_tvp; 1546 struct componentname *a_tcnp; 1547 } */ *ap = v; 1548 struct vnode *fvp = ap->a_fvp; 1549 struct vnode *tvp = ap->a_tvp; 1550 struct vnode *fdvp = ap->a_fdvp; 1551 struct vnode *tdvp = ap->a_tdvp; 1552 struct componentname *tcnp = ap->a_tcnp; 1553 struct componentname *fcnp = ap->a_fcnp; 1554 int error; 1555 1556 #ifndef DIAGNOSTIC 1557 if ((tcnp->cn_flags & HASBUF) == 0 || 1558 (fcnp->cn_flags & HASBUF) == 0) 1559 panic("nfs_rename: no name"); 1560 #endif 1561 /* Check for cross-device rename */ 1562 if ((fvp->v_mount != tdvp->v_mount) || 1563 (tvp && (fvp->v_mount != tvp->v_mount))) { 1564 error = EXDEV; 1565 goto out; 1566 } 1567 1568 /* 1569 * If the tvp exists and is in use, sillyrename it before doing the 1570 * rename of the new file over it. 1571 */ 1572 if (tvp && tvp->v_usecount > 1 && !VTONFS(tvp)->n_sillyrename && 1573 tvp->v_type != VDIR && !nfs_sillyrename(tdvp, tvp, tcnp)) { 1574 vrele(tvp); 1575 tvp = NULL; 1576 } 1577 1578 error = nfs_renamerpc(fdvp, fcnp->cn_nameptr, fcnp->cn_namelen, 1579 tdvp, tcnp->cn_nameptr, tcnp->cn_namelen, tcnp->cn_cred, 1580 tcnp->cn_proc); 1581 1582 if (fvp->v_type == VDIR) { 1583 if (tvp != NULL && tvp->v_type == VDIR) 1584 cache_purge(tdvp); 1585 cache_purge(fdvp); 1586 } 1587 out: 1588 if (tdvp == tvp) 1589 vrele(tdvp); 1590 else 1591 vput(tdvp); 1592 if (tvp) 1593 vput(tvp); 1594 vrele(fdvp); 1595 vrele(fvp); 1596 /* 1597 * Kludge: Map ENOENT => 0 assuming that it is a reply to a retry. 1598 */ 1599 if (error == ENOENT) 1600 error = 0; 1601 return (error); 1602 } 1603 1604 /* 1605 * nfs file rename rpc called from nfs_remove() above 1606 */ 1607 int 1608 nfs_renameit(sdvp, scnp, sp) 1609 struct vnode *sdvp; 1610 struct componentname *scnp; 1611 struct sillyrename *sp; 1612 { 1613 return (nfs_renamerpc(sdvp, scnp->cn_nameptr, scnp->cn_namelen, 1614 sdvp, sp->s_name, sp->s_namlen, scnp->cn_cred, scnp->cn_proc)); 1615 } 1616 1617 /* 1618 * Do an nfs rename rpc. Called from nfs_rename() and nfs_renameit(). 1619 */ 1620 int 1621 nfs_renamerpc(fdvp, fnameptr, fnamelen, tdvp, tnameptr, tnamelen, cred, proc) 1622 struct vnode *fdvp; 1623 const char *fnameptr; 1624 int fnamelen; 1625 struct vnode *tdvp; 1626 const char *tnameptr; 1627 int tnamelen; 1628 struct ucred *cred; 1629 struct proc *proc; 1630 { 1631 u_int32_t *tl; 1632 caddr_t cp; 1633 int32_t t1, t2; 1634 caddr_t bpos, dpos, cp2; 1635 int error = 0, fwccflag = NFSV3_WCCRATTR, twccflag = NFSV3_WCCRATTR; 1636 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 1637 int v3 = NFS_ISV3(fdvp); 1638 1639 nfsstats.rpccnt[NFSPROC_RENAME]++; 1640 nfsm_reqhead(fdvp, NFSPROC_RENAME, 1641 (NFSX_FH(v3) + NFSX_UNSIGNED)*2 + nfsm_rndup(fnamelen) + 1642 nfsm_rndup(tnamelen)); 1643 nfsm_fhtom(fdvp, v3); 1644 nfsm_strtom(fnameptr, fnamelen, NFS_MAXNAMLEN); 1645 nfsm_fhtom(tdvp, v3); 1646 nfsm_strtom(tnameptr, tnamelen, NFS_MAXNAMLEN); 1647 nfsm_request(fdvp, NFSPROC_RENAME, proc, cred); 1648 if (v3) { 1649 nfsm_wcc_data(fdvp, fwccflag); 1650 nfsm_wcc_data(tdvp, twccflag); 1651 } 1652 nfsm_reqdone; 1653 VTONFS(fdvp)->n_flag |= NMODIFIED; 1654 VTONFS(tdvp)->n_flag |= NMODIFIED; 1655 if (!fwccflag) 1656 VTONFS(fdvp)->n_attrstamp = 0; 1657 if (!twccflag) 1658 VTONFS(tdvp)->n_attrstamp = 0; 1659 return (error); 1660 } 1661 1662 /* 1663 * nfs hard link create call 1664 */ 1665 int 1666 nfs_link(v) 1667 void *v; 1668 { 1669 struct vop_link_args /* { 1670 struct vnode *a_dvp; 1671 struct vnode *a_vp; 1672 struct componentname *a_cnp; 1673 } */ *ap = v; 1674 struct vnode *vp = ap->a_vp; 1675 struct vnode *dvp = ap->a_dvp; 1676 struct componentname *cnp = ap->a_cnp; 1677 u_int32_t *tl; 1678 caddr_t cp; 1679 int32_t t1, t2; 1680 caddr_t bpos, dpos, cp2; 1681 int error = 0, wccflag = NFSV3_WCCRATTR, attrflag = 0; 1682 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 1683 int v3; 1684 1685 if (dvp->v_mount != vp->v_mount) { 1686 VOP_ABORTOP(vp, cnp); 1687 vput(dvp); 1688 return (EXDEV); 1689 } 1690 1691 /* 1692 * Push all writes to the server, so that the attribute cache 1693 * doesn't get "out of sync" with the server. 1694 * XXX There should be a better way! 1695 */ 1696 VOP_FSYNC(vp, cnp->cn_cred, FSYNC_WAIT, cnp->cn_proc); 1697 1698 v3 = NFS_ISV3(vp); 1699 nfsstats.rpccnt[NFSPROC_LINK]++; 1700 nfsm_reqhead(vp, NFSPROC_LINK, 1701 NFSX_FH(v3)*2 + NFSX_UNSIGNED + nfsm_rndup(cnp->cn_namelen)); 1702 nfsm_fhtom(vp, v3); 1703 nfsm_fhtom(dvp, v3); 1704 nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN); 1705 nfsm_request(vp, NFSPROC_LINK, cnp->cn_proc, cnp->cn_cred); 1706 if (v3) { 1707 nfsm_postop_attr(vp, attrflag); 1708 nfsm_wcc_data(dvp, wccflag); 1709 } 1710 nfsm_reqdone; 1711 FREE(cnp->cn_pnbuf, M_NAMEI); 1712 VTONFS(dvp)->n_flag |= NMODIFIED; 1713 if (!attrflag) 1714 VTONFS(vp)->n_attrstamp = 0; 1715 if (!wccflag) 1716 VTONFS(dvp)->n_attrstamp = 0; 1717 vput(dvp); 1718 /* 1719 * Kludge: Map EEXIST => 0 assuming that it is a reply to a retry. 1720 */ 1721 if (error == EEXIST) 1722 error = 0; 1723 return (error); 1724 } 1725 1726 /* 1727 * nfs symbolic link create call 1728 */ 1729 int 1730 nfs_symlink(v) 1731 void *v; 1732 { 1733 struct vop_symlink_args /* { 1734 struct vnode *a_dvp; 1735 struct vnode **a_vpp; 1736 struct componentname *a_cnp; 1737 struct vattr *a_vap; 1738 char *a_target; 1739 } */ *ap = v; 1740 struct vnode *dvp = ap->a_dvp; 1741 struct vattr *vap = ap->a_vap; 1742 struct componentname *cnp = ap->a_cnp; 1743 struct nfsv2_sattr *sp; 1744 u_int32_t *tl; 1745 caddr_t cp; 1746 int32_t t1, t2; 1747 caddr_t bpos, dpos, cp2; 1748 int slen, error = 0, wccflag = NFSV3_WCCRATTR, gotvp; 1749 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 1750 struct vnode *newvp = (struct vnode *)0; 1751 int v3 = NFS_ISV3(dvp); 1752 1753 nfsstats.rpccnt[NFSPROC_SYMLINK]++; 1754 slen = strlen(ap->a_target); 1755 nfsm_reqhead(dvp, NFSPROC_SYMLINK, NFSX_FH(v3) + 2*NFSX_UNSIGNED + 1756 nfsm_rndup(cnp->cn_namelen) + nfsm_rndup(slen) + NFSX_SATTR(v3)); 1757 nfsm_fhtom(dvp, v3); 1758 nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN); 1759 if (v3) 1760 nfsm_v3attrbuild(vap, FALSE); 1761 nfsm_strtom(ap->a_target, slen, NFS_MAXPATHLEN); 1762 if (!v3) { 1763 nfsm_build(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 1764 sp->sa_mode = vtonfsv2_mode(VLNK, vap->va_mode); 1765 sp->sa_uid = nfs_xdrneg1; 1766 sp->sa_gid = nfs_xdrneg1; 1767 sp->sa_size = nfs_xdrneg1; 1768 txdr_nfsv2time(&vap->va_atime, &sp->sa_atime); 1769 txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime); 1770 } 1771 nfsm_request(dvp, NFSPROC_SYMLINK, cnp->cn_proc, cnp->cn_cred); 1772 if (v3) { 1773 if (!error) 1774 nfsm_mtofh(dvp, newvp, v3, gotvp); 1775 nfsm_wcc_data(dvp, wccflag); 1776 } 1777 nfsm_reqdone; 1778 if (newvp) 1779 vrele(newvp); 1780 FREE(cnp->cn_pnbuf, M_NAMEI); 1781 VTONFS(dvp)->n_flag |= NMODIFIED; 1782 if (!wccflag) 1783 VTONFS(dvp)->n_attrstamp = 0; 1784 vrele(dvp); 1785 /* 1786 * Kludge: Map EEXIST => 0 assuming that it is a reply to a retry. 1787 */ 1788 if (error == EEXIST) 1789 error = 0; 1790 return (error); 1791 } 1792 1793 /* 1794 * nfs make dir call 1795 */ 1796 int 1797 nfs_mkdir(v) 1798 void *v; 1799 { 1800 struct vop_mkdir_args /* { 1801 struct vnode *a_dvp; 1802 struct vnode **a_vpp; 1803 struct componentname *a_cnp; 1804 struct vattr *a_vap; 1805 } */ *ap = v; 1806 struct vnode *dvp = ap->a_dvp; 1807 struct vattr *vap = ap->a_vap; 1808 struct componentname *cnp = ap->a_cnp; 1809 struct nfsv2_sattr *sp; 1810 u_int32_t *tl; 1811 caddr_t cp; 1812 int32_t t1, t2; 1813 int len; 1814 struct nfsnode *np = (struct nfsnode *)0; 1815 struct vnode *newvp = (struct vnode *)0; 1816 caddr_t bpos, dpos, cp2; 1817 int error = 0, wccflag = NFSV3_WCCRATTR; 1818 int gotvp = 0; 1819 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 1820 int v3 = NFS_ISV3(dvp); 1821 1822 len = cnp->cn_namelen; 1823 nfsstats.rpccnt[NFSPROC_MKDIR]++; 1824 nfsm_reqhead(dvp, NFSPROC_MKDIR, 1825 NFSX_FH(v3) + NFSX_UNSIGNED + nfsm_rndup(len) + NFSX_SATTR(v3)); 1826 nfsm_fhtom(dvp, v3); 1827 nfsm_strtom(cnp->cn_nameptr, len, NFS_MAXNAMLEN); 1828 if (v3) { 1829 nfsm_v3attrbuild(vap, FALSE); 1830 } else { 1831 nfsm_build(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 1832 sp->sa_mode = vtonfsv2_mode(VDIR, vap->va_mode); 1833 sp->sa_uid = nfs_xdrneg1; 1834 sp->sa_gid = nfs_xdrneg1; 1835 sp->sa_size = nfs_xdrneg1; 1836 txdr_nfsv2time(&vap->va_atime, &sp->sa_atime); 1837 txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime); 1838 } 1839 nfsm_request(dvp, NFSPROC_MKDIR, cnp->cn_proc, cnp->cn_cred); 1840 if (!error) 1841 nfsm_mtofh(dvp, newvp, v3, gotvp); 1842 if (v3) 1843 nfsm_wcc_data(dvp, wccflag); 1844 nfsm_reqdone; 1845 VTONFS(dvp)->n_flag |= NMODIFIED; 1846 if (!wccflag) 1847 VTONFS(dvp)->n_attrstamp = 0; 1848 /* 1849 * Kludge: Map EEXIST => 0 assuming that you have a reply to a retry 1850 * if we can succeed in looking up the directory. 1851 */ 1852 if (error == EEXIST || (!error && !gotvp)) { 1853 if (newvp) { 1854 vrele(newvp); 1855 newvp = (struct vnode *)0; 1856 } 1857 error = nfs_lookitup(dvp, cnp->cn_nameptr, len, cnp->cn_cred, 1858 cnp->cn_proc, &np); 1859 if (!error) { 1860 newvp = NFSTOV(np); 1861 if (newvp->v_type != VDIR) 1862 error = EEXIST; 1863 } 1864 } 1865 if (error) { 1866 if (newvp) 1867 vrele(newvp); 1868 } else { 1869 if (cnp->cn_flags & MAKEENTRY) 1870 cache_enter(dvp, newvp, cnp); 1871 *ap->a_vpp = newvp; 1872 } 1873 FREE(cnp->cn_pnbuf, M_NAMEI); 1874 vrele(dvp); 1875 return (error); 1876 } 1877 1878 /* 1879 * nfs remove directory call 1880 */ 1881 int 1882 nfs_rmdir(v) 1883 void *v; 1884 { 1885 struct vop_rmdir_args /* { 1886 struct vnode *a_dvp; 1887 struct vnode *a_vp; 1888 struct componentname *a_cnp; 1889 } */ *ap = v; 1890 struct vnode *vp = ap->a_vp; 1891 struct vnode *dvp = ap->a_dvp; 1892 struct componentname *cnp = ap->a_cnp; 1893 u_int32_t *tl; 1894 caddr_t cp; 1895 int32_t t1, t2; 1896 caddr_t bpos, dpos, cp2; 1897 int error = 0, wccflag = NFSV3_WCCRATTR; 1898 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 1899 int v3 = NFS_ISV3(dvp); 1900 1901 if (dvp == vp) { 1902 vrele(dvp); 1903 vrele(dvp); 1904 FREE(cnp->cn_pnbuf, M_NAMEI); 1905 return (EINVAL); 1906 } 1907 nfsstats.rpccnt[NFSPROC_RMDIR]++; 1908 nfsm_reqhead(dvp, NFSPROC_RMDIR, 1909 NFSX_FH(v3) + NFSX_UNSIGNED + nfsm_rndup(cnp->cn_namelen)); 1910 nfsm_fhtom(dvp, v3); 1911 nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN); 1912 nfsm_request(dvp, NFSPROC_RMDIR, cnp->cn_proc, cnp->cn_cred); 1913 if (v3) 1914 nfsm_wcc_data(dvp, wccflag); 1915 nfsm_reqdone; 1916 FREE(cnp->cn_pnbuf, M_NAMEI); 1917 VTONFS(dvp)->n_flag |= NMODIFIED; 1918 if (!wccflag) 1919 VTONFS(dvp)->n_attrstamp = 0; 1920 cache_purge(dvp); 1921 cache_purge(vp); 1922 vrele(vp); 1923 vrele(dvp); 1924 /* 1925 * Kludge: Map ENOENT => 0 assuming that you have a reply to a retry. 1926 */ 1927 if (error == ENOENT) 1928 error = 0; 1929 return (error); 1930 } 1931 1932 /* 1933 * nfs readdir call 1934 */ 1935 int 1936 nfs_readdir(v) 1937 void *v; 1938 { 1939 struct vop_readdir_args /* { 1940 struct vnode *a_vp; 1941 struct uio *a_uio; 1942 struct ucred *a_cred; 1943 int *a_eofflag; 1944 off_t **a_cookies; 1945 int *a_ncookies; 1946 } */ *ap = v; 1947 struct vnode *vp = ap->a_vp; 1948 struct uio *uio = ap->a_uio; 1949 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 1950 char *base = uio->uio_iov->iov_base; 1951 int tresid, error; 1952 size_t count, lost; 1953 struct dirent *dp; 1954 off_t *cookies = NULL; 1955 int ncookies = 0, nc; 1956 1957 if (vp->v_type != VDIR) 1958 return (EPERM); 1959 1960 lost = uio->uio_resid & (NFS_DIRFRAGSIZ - 1); 1961 count = uio->uio_resid - lost; 1962 if (count <= 0) 1963 return (EINVAL); 1964 1965 /* 1966 * Call nfs_bioread() to do the real work. 1967 */ 1968 tresid = uio->uio_resid = count; 1969 error = nfs_bioread(vp, uio, 0, ap->a_cred, 1970 ap->a_cookies ? NFSBIO_CACHECOOKIES : 0); 1971 1972 if (!error && ap->a_cookies) { 1973 ncookies = count / 16; 1974 MALLOC(cookies, off_t *, sizeof (off_t) * ncookies, M_TEMP, 1975 M_WAITOK); 1976 *ap->a_cookies = cookies; 1977 } 1978 1979 if (!error && uio->uio_resid == tresid) { 1980 uio->uio_resid += lost; 1981 nfsstats.direofcache_misses++; 1982 if (ap->a_cookies) 1983 *ap->a_ncookies = 0; 1984 *ap->a_eofflag = 1; 1985 return (0); 1986 } 1987 1988 if (!error && ap->a_cookies) { 1989 /* 1990 * Only the NFS server and emulations use cookies, and they 1991 * load the directory block into system space, so we can 1992 * just look at it directly. 1993 */ 1994 if (uio->uio_segflg != UIO_SYSSPACE || uio->uio_iovcnt != 1) 1995 panic("nfs_readdir: lost in space"); 1996 for (nc = 0; ncookies-- && 1997 base < (char *)uio->uio_iov->iov_base; nc++){ 1998 dp = (struct dirent *) base; 1999 if (dp->d_reclen == 0) 2000 break; 2001 if (nmp->nm_flag & NFSMNT_XLATECOOKIE) 2002 *(cookies++) = (off_t)NFS_GETCOOKIE32(dp); 2003 else 2004 *(cookies++) = NFS_GETCOOKIE(dp); 2005 base += dp->d_reclen; 2006 } 2007 uio->uio_resid += 2008 ((caddr_t)uio->uio_iov->iov_base - base); 2009 uio->uio_iov->iov_len += 2010 ((caddr_t)uio->uio_iov->iov_base - base); 2011 uio->uio_iov->iov_base = base; 2012 *ap->a_ncookies = nc; 2013 } 2014 2015 uio->uio_resid += lost; 2016 *ap->a_eofflag = 0; 2017 return (error); 2018 } 2019 2020 /* 2021 * Readdir rpc call. 2022 * Called from below the buffer cache by nfs_doio(). 2023 */ 2024 int 2025 nfs_readdirrpc(vp, uiop, cred) 2026 struct vnode *vp; 2027 struct uio *uiop; 2028 struct ucred *cred; 2029 { 2030 int len, left; 2031 struct dirent *dp = NULL; 2032 u_int32_t *tl; 2033 caddr_t cp; 2034 int32_t t1, t2; 2035 caddr_t bpos, dpos, cp2; 2036 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 2037 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 2038 struct nfsnode *dnp = VTONFS(vp); 2039 u_quad_t fileno; 2040 int error = 0, tlen, more_dirs = 1, blksiz = 0, bigenough = 1; 2041 int attrflag, nrpcs = 0, reclen; 2042 int v3 = NFS_ISV3(vp); 2043 nfsquad_t cookie; 2044 2045 #ifdef DIAGNOSTIC 2046 /* 2047 * Should be called from buffer cache, so only amount of 2048 * NFS_DIRBLKSIZ will be requested. 2049 */ 2050 if (uiop->uio_iovcnt != 1 || (uiop->uio_resid & (NFS_DIRBLKSIZ - 1))) 2051 panic("nfs readdirrpc bad uio"); 2052 #endif 2053 2054 /* 2055 * Loop around doing readdir rpc's of size nm_readdirsize 2056 * truncated to a multiple of NFS_DIRFRAGSIZ. 2057 * The stopping criteria is EOF or buffer full. 2058 */ 2059 while (more_dirs && bigenough) { 2060 /* 2061 * Heuristic: don't bother to do another RPC to further 2062 * fill up this block if there is not much room left. (< 50% 2063 * of the readdir RPC size). This wastes some buffer space 2064 * but can save up to 50% in RPC calls. 2065 */ 2066 if (nrpcs > 0 && uiop->uio_resid < (nmp->nm_readdirsize / 2)) { 2067 bigenough = 0; 2068 break; 2069 } 2070 nfsstats.rpccnt[NFSPROC_READDIR]++; 2071 nfsm_reqhead(vp, NFSPROC_READDIR, NFSX_FH(v3) + 2072 NFSX_READDIR(v3)); 2073 nfsm_fhtom(vp, v3); 2074 if (v3) { 2075 nfsm_build(tl, u_int32_t *, 5 * NFSX_UNSIGNED); 2076 cookie.qval = uiop->uio_offset; 2077 if (nmp->nm_iflag & NFSMNT_SWAPCOOKIE) { 2078 txdr_swapcookie3(uiop->uio_offset, tl); 2079 } else { 2080 txdr_cookie3(uiop->uio_offset, tl); 2081 } 2082 tl += 2; 2083 *tl++ = dnp->n_cookieverf.nfsuquad[0]; 2084 *tl++ = dnp->n_cookieverf.nfsuquad[1]; 2085 } else { 2086 nfsm_build(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 2087 *tl++ = txdr_unsigned(uiop->uio_offset); 2088 } 2089 *tl = txdr_unsigned(nmp->nm_readdirsize); 2090 nfsm_request(vp, NFSPROC_READDIR, uiop->uio_procp, cred); 2091 nrpcs++; 2092 if (v3) { 2093 nfsm_postop_attr(vp, attrflag); 2094 if (!error) { 2095 nfsm_dissect(tl, u_int32_t *, 2096 2 * NFSX_UNSIGNED); 2097 dnp->n_cookieverf.nfsuquad[0] = *tl++; 2098 dnp->n_cookieverf.nfsuquad[1] = *tl; 2099 } else { 2100 m_freem(mrep); 2101 goto nfsmout; 2102 } 2103 } 2104 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 2105 more_dirs = fxdr_unsigned(int, *tl); 2106 2107 /* loop thru the dir entries, doctoring them to 4bsd form */ 2108 while (more_dirs && bigenough) { 2109 if (v3) { 2110 nfsm_dissect(tl, u_int32_t *, 2111 3 * NFSX_UNSIGNED); 2112 fileno = fxdr_hyper(tl); 2113 len = fxdr_unsigned(int, *(tl + 2)); 2114 } else { 2115 nfsm_dissect(tl, u_int32_t *, 2116 2 * NFSX_UNSIGNED); 2117 fileno = fxdr_unsigned(u_quad_t, *tl++); 2118 len = fxdr_unsigned(int, *tl); 2119 } 2120 if (len <= 0 || len > NFS_MAXNAMLEN) { 2121 error = EBADRPC; 2122 m_freem(mrep); 2123 goto nfsmout; 2124 } 2125 tlen = nfsm_rndup(len); 2126 if (tlen == len) 2127 tlen += 4; /* To ensure null termination */ 2128 tlen += sizeof (off_t) + sizeof (int); 2129 reclen = ALIGN(tlen + DIRHDSIZ); 2130 tlen = reclen - DIRHDSIZ; 2131 left = NFS_DIRFRAGSIZ - blksiz; 2132 if (reclen > left) { 2133 dp->d_reclen += left; 2134 (caddr_t)uiop->uio_iov->iov_base += left; 2135 uiop->uio_iov->iov_len -= left; 2136 uiop->uio_resid -= left; 2137 blksiz = 0; 2138 NFS_STASHCOOKIE(dp, uiop->uio_offset); 2139 } 2140 if (reclen > uiop->uio_resid) 2141 bigenough = 0; 2142 if (bigenough) { 2143 dp = (struct dirent *)uiop->uio_iov->iov_base; 2144 dp->d_fileno = (int)fileno; 2145 dp->d_namlen = len; 2146 dp->d_reclen = reclen; 2147 dp->d_type = DT_UNKNOWN; 2148 blksiz += dp->d_reclen; 2149 if (blksiz == NFS_DIRFRAGSIZ) 2150 blksiz = 0; 2151 uiop->uio_resid -= DIRHDSIZ; 2152 (caddr_t)uiop->uio_iov->iov_base += DIRHDSIZ; 2153 uiop->uio_iov->iov_len -= DIRHDSIZ; 2154 nfsm_mtouio(uiop, len); 2155 cp = uiop->uio_iov->iov_base; 2156 tlen -= len; 2157 *cp = '\0'; /* null terminate */ 2158 (caddr_t)uiop->uio_iov->iov_base += tlen; 2159 uiop->uio_iov->iov_len -= tlen; 2160 uiop->uio_resid -= tlen; 2161 } else 2162 nfsm_adv(nfsm_rndup(len)); 2163 if (v3) { 2164 nfsm_dissect(tl, u_int32_t *, 2165 3 * NFSX_UNSIGNED); 2166 } else { 2167 nfsm_dissect(tl, u_int32_t *, 2168 2 * NFSX_UNSIGNED); 2169 } 2170 if (bigenough) { 2171 if (v3) { 2172 if (nmp->nm_iflag & NFSMNT_SWAPCOOKIE) 2173 uiop->uio_offset = 2174 fxdr_swapcookie3(tl); 2175 else 2176 uiop->uio_offset = 2177 fxdr_cookie3(tl); 2178 } 2179 else { 2180 uiop->uio_offset = 2181 fxdr_unsigned(off_t, *tl); 2182 } 2183 NFS_STASHCOOKIE(dp, uiop->uio_offset); 2184 } 2185 if (v3) 2186 tl += 2; 2187 else 2188 tl++; 2189 more_dirs = fxdr_unsigned(int, *tl); 2190 } 2191 /* 2192 * If at end of rpc data, get the eof boolean 2193 */ 2194 if (!more_dirs) { 2195 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 2196 more_dirs = (fxdr_unsigned(int, *tl) == 0); 2197 } 2198 m_freem(mrep); 2199 } 2200 /* 2201 * Fill last record, iff any, out to a multiple of NFS_DIRFRAGSIZ 2202 * by increasing d_reclen for the last record. 2203 */ 2204 if (blksiz > 0) { 2205 left = NFS_DIRFRAGSIZ - blksiz; 2206 dp->d_reclen += left; 2207 NFS_STASHCOOKIE(dp, uiop->uio_offset); 2208 (caddr_t)uiop->uio_iov->iov_base += left; 2209 uiop->uio_iov->iov_len -= left; 2210 uiop->uio_resid -= left; 2211 } 2212 2213 /* 2214 * We are now either at the end of the directory or have filled the 2215 * block. 2216 */ 2217 if (bigenough) 2218 dnp->n_direofoffset = uiop->uio_offset; 2219 nfsmout: 2220 return (error); 2221 } 2222 2223 /* 2224 * NFS V3 readdir plus RPC. Used in place of nfs_readdirrpc(). 2225 */ 2226 int 2227 nfs_readdirplusrpc(vp, uiop, cred) 2228 struct vnode *vp; 2229 struct uio *uiop; 2230 struct ucred *cred; 2231 { 2232 int len, left; 2233 struct dirent *dp = NULL; 2234 u_int32_t *tl; 2235 caddr_t cp; 2236 int32_t t1, t2; 2237 struct vnode *newvp; 2238 caddr_t bpos, dpos, cp2; 2239 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 2240 struct nameidata nami, *ndp = &nami; 2241 struct componentname *cnp = &ndp->ni_cnd; 2242 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 2243 struct nfsnode *dnp = VTONFS(vp), *np; 2244 const unsigned char *hcp; 2245 nfsfh_t *fhp; 2246 u_quad_t fileno; 2247 int error = 0, tlen, more_dirs = 1, blksiz = 0, doit, bigenough = 1, i; 2248 int attrflag, fhsize, nrpcs = 0, reclen; 2249 struct nfs_fattr fattr, *fp; 2250 2251 #ifdef DIAGNOSTIC 2252 if (uiop->uio_iovcnt != 1 || (uiop->uio_resid & (NFS_DIRBLKSIZ - 1))) 2253 panic("nfs readdirplusrpc bad uio"); 2254 #endif 2255 ndp->ni_dvp = vp; 2256 newvp = NULLVP; 2257 2258 /* 2259 * Loop around doing readdir rpc's of size nm_readdirsize 2260 * truncated to a multiple of NFS_DIRFRAGSIZ. 2261 * The stopping criteria is EOF or buffer full. 2262 */ 2263 while (more_dirs && bigenough) { 2264 if (nrpcs > 0 && uiop->uio_resid < (nmp->nm_readdirsize / 2)) { 2265 bigenough = 0; 2266 break; 2267 } 2268 nfsstats.rpccnt[NFSPROC_READDIRPLUS]++; 2269 nfsm_reqhead(vp, NFSPROC_READDIRPLUS, 2270 NFSX_FH(1) + 6 * NFSX_UNSIGNED); 2271 nfsm_fhtom(vp, 1); 2272 nfsm_build(tl, u_int32_t *, 6 * NFSX_UNSIGNED); 2273 if (nmp->nm_iflag & NFSMNT_SWAPCOOKIE) { 2274 txdr_swapcookie3(uiop->uio_offset, tl); 2275 } else { 2276 txdr_cookie3(uiop->uio_offset, tl); 2277 } 2278 tl += 2; 2279 *tl++ = dnp->n_cookieverf.nfsuquad[0]; 2280 *tl++ = dnp->n_cookieverf.nfsuquad[1]; 2281 *tl++ = txdr_unsigned(nmp->nm_readdirsize); 2282 *tl = txdr_unsigned(nmp->nm_rsize); 2283 nfsm_request(vp, NFSPROC_READDIRPLUS, uiop->uio_procp, cred); 2284 nfsm_postop_attr(vp, attrflag); 2285 if (error) { 2286 m_freem(mrep); 2287 goto nfsmout; 2288 } 2289 nrpcs++; 2290 nfsm_dissect(tl, u_int32_t *, 3 * NFSX_UNSIGNED); 2291 dnp->n_cookieverf.nfsuquad[0] = *tl++; 2292 dnp->n_cookieverf.nfsuquad[1] = *tl++; 2293 more_dirs = fxdr_unsigned(int, *tl); 2294 2295 /* loop thru the dir entries, doctoring them to 4bsd form */ 2296 while (more_dirs && bigenough) { 2297 nfsm_dissect(tl, u_int32_t *, 3 * NFSX_UNSIGNED); 2298 fileno = fxdr_hyper(tl); 2299 len = fxdr_unsigned(int, *(tl + 2)); 2300 if (len <= 0 || len > NFS_MAXNAMLEN) { 2301 error = EBADRPC; 2302 m_freem(mrep); 2303 goto nfsmout; 2304 } 2305 tlen = nfsm_rndup(len); 2306 if (tlen == len) 2307 tlen += 4; /* To ensure null termination*/ 2308 tlen += sizeof (off_t) + sizeof (int); 2309 reclen = ALIGN(tlen + DIRHDSIZ); 2310 tlen = reclen - DIRHDSIZ; 2311 left = NFS_DIRFRAGSIZ - blksiz; 2312 if (reclen > left) { 2313 /* 2314 * DIRFRAGSIZ is aligned, no need to align 2315 * again here. 2316 */ 2317 dp->d_reclen += left; 2318 (caddr_t)uiop->uio_iov->iov_base += left; 2319 uiop->uio_iov->iov_len -= left; 2320 uiop->uio_resid -= left; 2321 NFS_STASHCOOKIE(dp, uiop->uio_offset); 2322 blksiz = 0; 2323 } 2324 if (reclen > uiop->uio_resid) 2325 bigenough = 0; 2326 if (bigenough) { 2327 dp = (struct dirent *)uiop->uio_iov->iov_base; 2328 dp->d_fileno = (int)fileno; 2329 dp->d_namlen = len; 2330 dp->d_reclen = reclen; 2331 dp->d_type = DT_UNKNOWN; 2332 blksiz += dp->d_reclen; 2333 if (blksiz == NFS_DIRFRAGSIZ) 2334 blksiz = 0; 2335 uiop->uio_resid -= DIRHDSIZ; 2336 (caddr_t)uiop->uio_iov->iov_base += DIRHDSIZ; 2337 uiop->uio_iov->iov_len -= DIRHDSIZ; 2338 cnp->cn_nameptr = uiop->uio_iov->iov_base; 2339 cnp->cn_namelen = len; 2340 nfsm_mtouio(uiop, len); 2341 cp = uiop->uio_iov->iov_base; 2342 tlen -= len; 2343 *cp = '\0'; 2344 (caddr_t)uiop->uio_iov->iov_base += tlen; 2345 uiop->uio_iov->iov_len -= tlen; 2346 uiop->uio_resid -= tlen; 2347 } else 2348 nfsm_adv(nfsm_rndup(len)); 2349 nfsm_dissect(tl, u_int32_t *, 3 * NFSX_UNSIGNED); 2350 if (bigenough) { 2351 if (nmp->nm_iflag & NFSMNT_SWAPCOOKIE) 2352 uiop->uio_offset = 2353 fxdr_swapcookie3(tl); 2354 else 2355 uiop->uio_offset = 2356 fxdr_cookie3(tl); 2357 NFS_STASHCOOKIE(dp, uiop->uio_offset); 2358 } 2359 tl += 2; 2360 2361 /* 2362 * Since the attributes are before the file handle 2363 * (sigh), we must skip over the attributes and then 2364 * come back and get them. 2365 */ 2366 attrflag = fxdr_unsigned(int, *tl); 2367 if (attrflag) { 2368 nfsm_dissect(fp, struct nfs_fattr *, NFSX_V3FATTR); 2369 memcpy(&fattr, fp, NFSX_V3FATTR); 2370 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 2371 doit = fxdr_unsigned(int, *tl); 2372 if (doit) { 2373 nfsm_getfh(fhp, fhsize, 1); 2374 if (NFS_CMPFH(dnp, fhp, fhsize)) { 2375 VREF(vp); 2376 newvp = vp; 2377 np = dnp; 2378 } else { 2379 error = nfs_nget(vp->v_mount, fhp, 2380 fhsize, &np); 2381 if (!error) 2382 newvp = NFSTOV(np); 2383 } 2384 if (!error) { 2385 nfs_loadattrcache(&newvp, &fattr, 0); 2386 dp->d_type = 2387 IFTODT(VTTOIF(np->n_vattr->va_type)); 2388 ndp->ni_vp = newvp; 2389 cnp->cn_hash = 0; 2390 for (hcp = cnp->cn_nameptr, i = 1; i <= len; 2391 i++, hcp++) 2392 cnp->cn_hash += *hcp * i; 2393 if (cnp->cn_namelen <= NCHNAMLEN) 2394 cache_enter(ndp->ni_dvp, ndp->ni_vp, 2395 cnp); 2396 } 2397 } 2398 } else { 2399 /* Just skip over the file handle */ 2400 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 2401 i = fxdr_unsigned(int, *tl); 2402 nfsm_adv(nfsm_rndup(i)); 2403 } 2404 if (newvp != NULLVP) { 2405 vrele(newvp); 2406 newvp = NULLVP; 2407 } 2408 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 2409 more_dirs = fxdr_unsigned(int, *tl); 2410 } 2411 /* 2412 * If at end of rpc data, get the eof boolean 2413 */ 2414 if (!more_dirs) { 2415 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 2416 more_dirs = (fxdr_unsigned(int, *tl) == 0); 2417 } 2418 m_freem(mrep); 2419 } 2420 /* 2421 * Fill last record, iff any, out to a multiple of NFS_DIRFRAGSIZ 2422 * by increasing d_reclen for the last record. 2423 */ 2424 if (blksiz > 0) { 2425 left = NFS_DIRFRAGSIZ - blksiz; 2426 dp->d_reclen += left; 2427 NFS_STASHCOOKIE(dp, uiop->uio_offset); 2428 (caddr_t)uiop->uio_iov->iov_base += left; 2429 uiop->uio_iov->iov_len -= left; 2430 uiop->uio_resid -= left; 2431 } 2432 2433 /* 2434 * We are now either at the end of the directory or have filled the 2435 * block. 2436 */ 2437 if (bigenough) 2438 dnp->n_direofoffset = uiop->uio_offset; 2439 nfsmout: 2440 if (newvp != NULLVP) 2441 vrele(newvp); 2442 return (error); 2443 } 2444 static char hextoasc[] = "0123456789abcdef"; 2445 2446 /* 2447 * Silly rename. To make the NFS filesystem that is stateless look a little 2448 * more like the "ufs" a remove of an active vnode is translated to a rename 2449 * to a funny looking filename that is removed by nfs_inactive on the 2450 * nfsnode. There is the potential for another process on a different client 2451 * to create the same funny name between the nfs_lookitup() fails and the 2452 * nfs_rename() completes, but... 2453 */ 2454 int 2455 nfs_sillyrename(dvp, vp, cnp) 2456 struct vnode *dvp, *vp; 2457 struct componentname *cnp; 2458 { 2459 struct sillyrename *sp; 2460 struct nfsnode *np; 2461 int error; 2462 short pid; 2463 2464 cache_purge(dvp); 2465 np = VTONFS(vp); 2466 #ifndef DIAGNOSTIC 2467 if (vp->v_type == VDIR) 2468 panic("nfs: sillyrename dir"); 2469 #endif 2470 MALLOC(sp, struct sillyrename *, sizeof (struct sillyrename), 2471 M_NFSREQ, M_WAITOK); 2472 sp->s_cred = crdup(cnp->cn_cred); 2473 sp->s_dvp = dvp; 2474 VREF(dvp); 2475 2476 /* Fudge together a funny name */ 2477 pid = cnp->cn_proc->p_pid; 2478 memcpy(sp->s_name, ".nfsAxxxx4.4", 13); 2479 sp->s_namlen = 12; 2480 sp->s_name[8] = hextoasc[pid & 0xf]; 2481 sp->s_name[7] = hextoasc[(pid >> 4) & 0xf]; 2482 sp->s_name[6] = hextoasc[(pid >> 8) & 0xf]; 2483 sp->s_name[5] = hextoasc[(pid >> 12) & 0xf]; 2484 2485 /* Try lookitups until we get one that isn't there */ 2486 while (nfs_lookitup(dvp, sp->s_name, sp->s_namlen, sp->s_cred, 2487 cnp->cn_proc, (struct nfsnode **)0) == 0) { 2488 sp->s_name[4]++; 2489 if (sp->s_name[4] > 'z') { 2490 error = EINVAL; 2491 goto bad; 2492 } 2493 } 2494 error = nfs_renameit(dvp, cnp, sp); 2495 if (error) 2496 goto bad; 2497 error = nfs_lookitup(dvp, sp->s_name, sp->s_namlen, sp->s_cred, 2498 cnp->cn_proc, &np); 2499 np->n_sillyrename = sp; 2500 return (0); 2501 bad: 2502 vrele(sp->s_dvp); 2503 crfree(sp->s_cred); 2504 free((caddr_t)sp, M_NFSREQ); 2505 return (error); 2506 } 2507 2508 /* 2509 * Look up a file name and optionally either update the file handle or 2510 * allocate an nfsnode, depending on the value of npp. 2511 * npp == NULL --> just do the lookup 2512 * *npp == NULL --> allocate a new nfsnode and make sure attributes are 2513 * handled too 2514 * *npp != NULL --> update the file handle in the vnode 2515 */ 2516 int 2517 nfs_lookitup(dvp, name, len, cred, procp, npp) 2518 struct vnode *dvp; 2519 const char *name; 2520 int len; 2521 struct ucred *cred; 2522 struct proc *procp; 2523 struct nfsnode **npp; 2524 { 2525 u_int32_t *tl; 2526 caddr_t cp; 2527 int32_t t1, t2; 2528 struct vnode *newvp = (struct vnode *)0; 2529 struct nfsnode *np, *dnp = VTONFS(dvp); 2530 caddr_t bpos, dpos, cp2; 2531 int error = 0, fhlen, attrflag; 2532 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 2533 nfsfh_t *nfhp; 2534 int v3 = NFS_ISV3(dvp); 2535 2536 nfsstats.rpccnt[NFSPROC_LOOKUP]++; 2537 nfsm_reqhead(dvp, NFSPROC_LOOKUP, 2538 NFSX_FH(v3) + NFSX_UNSIGNED + nfsm_rndup(len)); 2539 nfsm_fhtom(dvp, v3); 2540 nfsm_strtom(name, len, NFS_MAXNAMLEN); 2541 nfsm_request(dvp, NFSPROC_LOOKUP, procp, cred); 2542 if (npp && !error) { 2543 nfsm_getfh(nfhp, fhlen, v3); 2544 if (*npp) { 2545 np = *npp; 2546 if (np->n_fhsize > NFS_SMALLFH && fhlen <= NFS_SMALLFH) { 2547 free((caddr_t)np->n_fhp, M_NFSBIGFH); 2548 np->n_fhp = &np->n_fh; 2549 } else if (np->n_fhsize <= NFS_SMALLFH && fhlen>NFS_SMALLFH) 2550 np->n_fhp =(nfsfh_t *)malloc(fhlen,M_NFSBIGFH,M_WAITOK); 2551 memcpy((caddr_t)np->n_fhp, (caddr_t)nfhp, fhlen); 2552 np->n_fhsize = fhlen; 2553 newvp = NFSTOV(np); 2554 } else if (NFS_CMPFH(dnp, nfhp, fhlen)) { 2555 VREF(dvp); 2556 newvp = dvp; 2557 } else { 2558 error = nfs_nget(dvp->v_mount, nfhp, fhlen, &np); 2559 if (error) { 2560 m_freem(mrep); 2561 return (error); 2562 } 2563 newvp = NFSTOV(np); 2564 } 2565 if (v3) { 2566 nfsm_postop_attr(newvp, attrflag); 2567 if (!attrflag && *npp == NULL) { 2568 m_freem(mrep); 2569 vrele(newvp); 2570 return (ENOENT); 2571 } 2572 } else 2573 nfsm_loadattr(newvp, (struct vattr *)0); 2574 } 2575 nfsm_reqdone; 2576 if (npp && *npp == NULL) { 2577 if (error) { 2578 if (newvp) 2579 vrele(newvp); 2580 } else 2581 *npp = np; 2582 } 2583 return (error); 2584 } 2585 2586 /* 2587 * Nfs Version 3 commit rpc 2588 */ 2589 int 2590 nfs_commit(vp, offset, cnt, cred, procp) 2591 struct vnode *vp; 2592 u_quad_t offset; 2593 int cnt; 2594 struct ucred *cred; 2595 struct proc *procp; 2596 { 2597 caddr_t cp; 2598 u_int32_t *tl; 2599 int32_t t1, t2; 2600 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 2601 caddr_t bpos, dpos, cp2; 2602 int error = 0, wccflag = NFSV3_WCCRATTR; 2603 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 2604 2605 if ((nmp->nm_iflag & NFSMNT_HASWRITEVERF) == 0) 2606 return (0); 2607 nfsstats.rpccnt[NFSPROC_COMMIT]++; 2608 nfsm_reqhead(vp, NFSPROC_COMMIT, NFSX_FH(1)); 2609 nfsm_fhtom(vp, 1); 2610 nfsm_build(tl, u_int32_t *, 3 * NFSX_UNSIGNED); 2611 txdr_hyper(offset, tl); 2612 tl += 2; 2613 *tl = txdr_unsigned(cnt); 2614 nfsm_request(vp, NFSPROC_COMMIT, procp, cred); 2615 nfsm_wcc_data(vp, wccflag); 2616 if (!error) { 2617 nfsm_dissect(tl, u_int32_t *, NFSX_V3WRITEVERF); 2618 if (memcmp((caddr_t)nmp->nm_verf, (caddr_t)tl, 2619 NFSX_V3WRITEVERF)) { 2620 memcpy((caddr_t)nmp->nm_verf, (caddr_t)tl, 2621 NFSX_V3WRITEVERF); 2622 error = NFSERR_STALEWRITEVERF; 2623 } 2624 } 2625 nfsm_reqdone; 2626 return (error); 2627 } 2628 2629 /* 2630 * Kludge City.. 2631 * - make nfs_bmap() essentially a no-op that does no translation 2632 * - do nfs_strategy() by doing I/O with nfs_readrpc/nfs_writerpc 2633 * (Maybe I could use the process's page mapping, but I was concerned that 2634 * Kernel Write might not be enabled and also figured copyout() would do 2635 * a lot more work than memcpy() and also it currently happens in the 2636 * context of the swapper process (2). 2637 */ 2638 int 2639 nfs_bmap(v) 2640 void *v; 2641 { 2642 struct vop_bmap_args /* { 2643 struct vnode *a_vp; 2644 daddr_t a_bn; 2645 struct vnode **a_vpp; 2646 daddr_t *a_bnp; 2647 int *a_runp; 2648 } */ *ap = v; 2649 struct vnode *vp = ap->a_vp; 2650 2651 if (ap->a_vpp != NULL) 2652 *ap->a_vpp = vp; 2653 if (ap->a_bnp != NULL) 2654 *ap->a_bnp = ap->a_bn * btodb(vp->v_mount->mnt_stat.f_iosize); 2655 return (0); 2656 } 2657 2658 /* 2659 * Strategy routine. 2660 * For async requests when nfsiod(s) are running, queue the request by 2661 * calling nfs_asyncio(), otherwise just all nfs_doio() to do the 2662 * request. 2663 */ 2664 int 2665 nfs_strategy(v) 2666 void *v; 2667 { 2668 struct vop_strategy_args *ap = v; 2669 struct buf *bp = ap->a_bp; 2670 struct ucred *cr; 2671 struct proc *p; 2672 int error = 0; 2673 2674 if ((bp->b_flags & (B_PHYS|B_ASYNC)) == (B_PHYS|B_ASYNC)) 2675 panic("nfs physio/async"); 2676 if (bp->b_flags & B_ASYNC) 2677 p = (struct proc *)0; 2678 else 2679 p = curproc; /* XXX */ 2680 if (bp->b_flags & B_READ) 2681 cr = bp->b_rcred; 2682 else 2683 cr = bp->b_wcred; 2684 /* 2685 * If the op is asynchronous and an i/o daemon is waiting 2686 * queue the request, wake it up and wait for completion 2687 * otherwise just do it ourselves. 2688 */ 2689 if ((bp->b_flags & B_ASYNC) == 0 || 2690 nfs_asyncio(bp, NOCRED)) 2691 error = nfs_doio(bp, cr, p); 2692 return (error); 2693 } 2694 2695 /* 2696 * Mmap a file 2697 * 2698 * NB Currently unsupported. 2699 */ 2700 /* ARGSUSED */ 2701 int 2702 nfs_mmap(v) 2703 void *v; 2704 { 2705 #if 0 2706 struct vop_mmap_args /* { 2707 struct vnode *a_vp; 2708 int a_fflags; 2709 struct ucred *a_cred; 2710 struct proc *a_p; 2711 } */ *ap = v; 2712 #endif 2713 2714 return (EINVAL); 2715 } 2716 2717 /* 2718 * fsync vnode op. Just call nfs_flush() with commit == 1. 2719 */ 2720 /* ARGSUSED */ 2721 int 2722 nfs_fsync(v) 2723 void *v; 2724 { 2725 struct vop_fsync_args /* { 2726 struct vnodeop_desc *a_desc; 2727 struct vnode * a_vp; 2728 struct ucred * a_cred; 2729 int a_flags; 2730 struct proc * a_p; 2731 } */ *ap = v; 2732 2733 return (nfs_flush(ap->a_vp, ap->a_cred, 2734 (ap->a_flags & FSYNC_WAIT) != 0 ? MNT_WAIT : 0, ap->a_p, 1)); 2735 } 2736 2737 /* 2738 * Flush all the blocks associated with a vnode. 2739 * Walk through the buffer pool and push any dirty pages 2740 * associated with the vnode. 2741 */ 2742 int 2743 nfs_flush(vp, cred, waitfor, p, commit) 2744 struct vnode *vp; 2745 struct ucred *cred; 2746 int waitfor; 2747 struct proc *p; 2748 int commit; 2749 { 2750 struct nfsnode *np = VTONFS(vp); 2751 struct buf *bp; 2752 int i; 2753 struct buf *nbp; 2754 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 2755 int s, error = 0, slptimeo = 0, slpflag = 0, retv, bvecpos; 2756 int passone = 1; 2757 u_quad_t off, endoff, toff; 2758 struct ucred* wcred; 2759 #ifndef NFS_COMMITBVECSIZ 2760 #define NFS_COMMITBVECSIZ 20 2761 #endif 2762 struct buf *bvec[NFS_COMMITBVECSIZ]; 2763 2764 if (nmp->nm_flag & NFSMNT_INT) 2765 slpflag = PCATCH; 2766 if (!commit) 2767 passone = 0; 2768 /* 2769 * A b_flags == (B_DELWRI | B_NEEDCOMMIT) block has been written to the 2770 * server, but nas not been committed to stable storage on the server 2771 * yet. On the first pass, the byte range is worked out and the commit 2772 * rpc is done. On the second pass, nfs_writebp() is called to do the 2773 * job. 2774 */ 2775 again: 2776 bvecpos = 0; 2777 off = (u_quad_t)-1; 2778 endoff = 0; 2779 wcred = NULL; 2780 if (NFS_ISV3(vp) && commit) { 2781 s = splbio(); 2782 for (bp = vp->v_dirtyblkhd.lh_first; bp; bp = nbp) { 2783 nbp = bp->b_vnbufs.le_next; 2784 if (bvecpos >= NFS_COMMITBVECSIZ) 2785 break; 2786 if ((bp->b_flags & (B_BUSY | B_DELWRI | B_NEEDCOMMIT)) 2787 != (B_DELWRI | B_NEEDCOMMIT)) 2788 continue; 2789 bremfree(bp); 2790 /* 2791 * Work out if all buffers are using the same cred 2792 * so we can deal with them all with one commit. 2793 */ 2794 if (wcred == NULL) 2795 wcred = bp->b_wcred; 2796 else if (wcred != bp->b_wcred) 2797 wcred = NOCRED; 2798 bp->b_flags |= (B_BUSY | B_WRITEINPROG); 2799 /* 2800 * A list of these buffers is kept so that the 2801 * second loop knows which buffers have actually 2802 * been committed. This is necessary, since there 2803 * may be a race between the commit rpc and new 2804 * uncommitted writes on the file. 2805 */ 2806 bvec[bvecpos++] = bp; 2807 toff = ((u_quad_t)bp->b_blkno) * DEV_BSIZE + 2808 bp->b_dirtyoff; 2809 if (toff < off) 2810 off = toff; 2811 toff += (u_quad_t)(bp->b_dirtyend - bp->b_dirtyoff); 2812 if (toff > endoff) 2813 endoff = toff; 2814 } 2815 splx(s); 2816 } 2817 if (bvecpos > 0) { 2818 /* 2819 * Commit data on the server, as required. 2820 * If all bufs are using the same wcred, then use that with 2821 * one call for all of them, otherwise commit each one 2822 * separately. 2823 */ 2824 if (wcred != NOCRED) 2825 retv = nfs_commit(vp, off, (int)(endoff - off), 2826 wcred, p); 2827 else { 2828 retv = 0; 2829 for (i = 0; i < bvecpos; i++) { 2830 off_t off, size; 2831 bp = bvec[i]; 2832 off = ((u_quad_t)bp->b_blkno) * DEV_BSIZE + 2833 bp->b_dirtyoff; 2834 size = (u_quad_t)(bp->b_dirtyend 2835 - bp->b_dirtyoff); 2836 retv = nfs_commit(vp, off, (int)size, 2837 bp->b_wcred, p); 2838 if (retv) break; 2839 } 2840 } 2841 2842 if (retv == NFSERR_STALEWRITEVERF) 2843 nfs_clearcommit(vp->v_mount); 2844 /* 2845 * Now, either mark the blocks I/O done or mark the 2846 * blocks dirty, depending on whether the commit 2847 * succeeded. 2848 */ 2849 for (i = 0; i < bvecpos; i++) { 2850 bp = bvec[i]; 2851 bp->b_flags &= ~(B_NEEDCOMMIT | B_WRITEINPROG); 2852 if (retv) 2853 brelse(bp); 2854 else { 2855 s = splbio(); 2856 vp->v_numoutput++; 2857 bp->b_flags |= B_ASYNC; 2858 bp->b_flags &= ~(B_READ|B_DONE|B_ERROR|B_DELWRI); 2859 bp->b_dirtyoff = bp->b_dirtyend = 0; 2860 reassignbuf(bp, vp); 2861 splx(s); 2862 biodone(bp); 2863 } 2864 } 2865 2866 /* 2867 * If there may be more uncommitted buffer, try to 2868 * commit them unless write verf isn't changed. 2869 */ 2870 if (retv != NFSERR_STALEWRITEVERF && 2871 bvecpos == NFS_COMMITBVECSIZ) 2872 goto again; 2873 } 2874 2875 /* 2876 * Start/do any write(s) that are required. 2877 */ 2878 loop: 2879 s = splbio(); 2880 for (bp = vp->v_dirtyblkhd.lh_first; bp; bp = nbp) { 2881 nbp = bp->b_vnbufs.le_next; 2882 if (bp->b_flags & B_BUSY) { 2883 if (waitfor != MNT_WAIT || passone) 2884 continue; 2885 bp->b_flags |= B_WANTED; 2886 error = tsleep((caddr_t)bp, slpflag | (PRIBIO + 1), 2887 "nfsfsync", slptimeo); 2888 splx(s); 2889 if (error) { 2890 if (nfs_sigintr(nmp, (struct nfsreq *)0, p)) 2891 return (EINTR); 2892 if (slpflag == PCATCH) { 2893 slpflag = 0; 2894 slptimeo = 2 * hz; 2895 } 2896 } 2897 goto loop; 2898 } 2899 if ((bp->b_flags & B_DELWRI) == 0) 2900 panic("nfs_fsync: not dirty"); 2901 if ((passone || !commit) && (bp->b_flags & B_NEEDCOMMIT)) 2902 continue; 2903 bremfree(bp); 2904 if (passone || !commit) 2905 bp->b_flags |= (B_BUSY|B_ASYNC); 2906 else 2907 bp->b_flags |= (B_BUSY|B_ASYNC|B_WRITEINPROG|B_NEEDCOMMIT); 2908 splx(s); 2909 VOP_BWRITE(bp); 2910 goto loop; 2911 } 2912 splx(s); 2913 if (passone) { 2914 passone = 0; 2915 goto again; 2916 } 2917 if (waitfor == MNT_WAIT) { 2918 s = splbio(); 2919 while (vp->v_numoutput) { 2920 vp->v_flag |= VBWAIT; 2921 error = tsleep((caddr_t)&vp->v_numoutput, 2922 slpflag | (PRIBIO + 1), "nfsfsync", slptimeo); 2923 if (error) { 2924 splx(s); 2925 if (nfs_sigintr(nmp, (struct nfsreq *)0, p)) 2926 return (EINTR); 2927 if (slpflag == PCATCH) { 2928 slpflag = 0; 2929 slptimeo = 2 * hz; 2930 } 2931 s = splbio(); 2932 } 2933 } 2934 splx(s); 2935 if (vp->v_dirtyblkhd.lh_first && commit) { 2936 #if 0 2937 vprint("nfs_fsync: dirty", vp); 2938 #endif 2939 goto loop; 2940 } 2941 } 2942 if (np->n_flag & NWRITEERR) { 2943 error = np->n_error; 2944 np->n_flag &= ~NWRITEERR; 2945 } 2946 return (error); 2947 } 2948 2949 /* 2950 * Return POSIX pathconf information applicable to nfs. 2951 * 2952 * N.B. The NFS V2 protocol doesn't support this RPC. 2953 */ 2954 /* ARGSUSED */ 2955 int 2956 nfs_pathconf(v) 2957 void *v; 2958 { 2959 struct vop_pathconf_args /* { 2960 struct vnode *a_vp; 2961 int a_name; 2962 register_t *a_retval; 2963 } */ *ap = v; 2964 struct nfsv3_pathconf *pcp; 2965 struct vnode *vp = ap->a_vp; 2966 struct nfsmount *nmp; 2967 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 2968 int32_t t1, t2; 2969 u_int32_t *tl; 2970 caddr_t bpos, dpos, cp, cp2; 2971 int error = 0, attrflag; 2972 unsigned int l; 2973 u_int64_t maxsize; 2974 int v3 = NFS_ISV3(vp); 2975 2976 switch (ap->a_name) { 2977 /* Names that can be resolved locally. */ 2978 case _PC_PIPE_BUF: 2979 *ap->a_retval = PIPE_BUF; 2980 break; 2981 case _PC_SYNC_IO: 2982 *ap->a_retval = 1; 2983 break; 2984 /* Names that cannot be resolved locally; do an RPC, if possible. */ 2985 case _PC_LINK_MAX: 2986 case _PC_NAME_MAX: 2987 case _PC_CHOWN_RESTRICTED: 2988 case _PC_NO_TRUNC: 2989 if (!v3) { 2990 error = EINVAL; 2991 break; 2992 } 2993 nfsstats.rpccnt[NFSPROC_PATHCONF]++; 2994 nfsm_reqhead(vp, NFSPROC_PATHCONF, NFSX_FH(1)); 2995 nfsm_fhtom(vp, 1); 2996 nfsm_request(vp, NFSPROC_PATHCONF, 2997 curproc, curproc->p_ucred); /* XXX */ 2998 nfsm_postop_attr(vp, attrflag); 2999 if (!error) { 3000 nfsm_dissect(pcp, struct nfsv3_pathconf *, 3001 NFSX_V3PATHCONF); 3002 switch (ap->a_name) { 3003 case _PC_LINK_MAX: 3004 *ap->a_retval = 3005 fxdr_unsigned(register_t, pcp->pc_linkmax); 3006 break; 3007 case _PC_NAME_MAX: 3008 *ap->a_retval = 3009 fxdr_unsigned(register_t, pcp->pc_namemax); 3010 break; 3011 case _PC_CHOWN_RESTRICTED: 3012 *ap->a_retval = 3013 (pcp->pc_chownrestricted == nfs_true); 3014 break; 3015 case _PC_NO_TRUNC: 3016 *ap->a_retval = 3017 (pcp->pc_notrunc == nfs_true); 3018 break; 3019 } 3020 } 3021 nfsm_reqdone; 3022 break; 3023 case _PC_FILESIZEBITS: 3024 if (v3) { 3025 nmp = VFSTONFS(vp->v_mount); 3026 if ((nmp->nm_iflag & NFSMNT_GOTFSINFO) == 0) 3027 if ((error = nfs_fsinfo(nmp, vp, 3028 curproc->p_ucred, curproc)) != 0) /* XXX */ 3029 break; 3030 for (l = 0, maxsize = nmp->nm_maxfilesize; 3031 (maxsize >> l) > 0; l++) 3032 ; 3033 *ap->a_retval = l + 1; 3034 } else { 3035 *ap->a_retval = 32; /* NFS V2 limitation */ 3036 } 3037 break; 3038 default: 3039 error = EINVAL; 3040 break; 3041 } 3042 3043 return (error); 3044 } 3045 3046 /* 3047 * NFS advisory byte-level locks. 3048 */ 3049 int 3050 nfs_advlock(v) 3051 void *v; 3052 { 3053 struct vop_advlock_args /* { 3054 struct vnode *a_vp; 3055 caddr_t a_id; 3056 int a_op; 3057 struct flock *a_fl; 3058 int a_flags; 3059 } */ *ap = v; 3060 struct nfsnode *np = VTONFS(ap->a_vp); 3061 3062 return lf_advlock(ap, &np->n_lockf, np->n_size); 3063 } 3064 3065 /* 3066 * Print out the contents of an nfsnode. 3067 */ 3068 int 3069 nfs_print(v) 3070 void *v; 3071 { 3072 struct vop_print_args /* { 3073 struct vnode *a_vp; 3074 } */ *ap = v; 3075 struct vnode *vp = ap->a_vp; 3076 struct nfsnode *np = VTONFS(vp); 3077 3078 printf("tag VT_NFS, fileid %ld fsid 0x%lx", 3079 np->n_vattr->va_fileid, np->n_vattr->va_fsid); 3080 if (vp->v_type == VFIFO) 3081 fifo_printinfo(vp); 3082 printf("\n"); 3083 return (0); 3084 } 3085 3086 /* 3087 * NFS file truncation. 3088 */ 3089 int 3090 nfs_truncate(v) 3091 void *v; 3092 { 3093 #if 0 3094 struct vop_truncate_args /* { 3095 struct vnode *a_vp; 3096 off_t a_length; 3097 int a_flags; 3098 struct ucred *a_cred; 3099 struct proc *a_p; 3100 } */ *ap = v; 3101 #endif 3102 3103 /* Use nfs_setattr */ 3104 return (EOPNOTSUPP); 3105 } 3106 3107 /* 3108 * NFS update. 3109 */ 3110 int 3111 nfs_update(v) 3112 void *v; 3113 #if 0 3114 struct vop_update_args /* { 3115 struct vnode *a_vp; 3116 struct timespec *a_ta; 3117 struct timespec *a_tm; 3118 int a_waitfor; 3119 } */ *ap = v; 3120 #endif 3121 { 3122 3123 /* Use nfs_setattr */ 3124 return (EOPNOTSUPP); 3125 } 3126 3127 /* 3128 * Just call nfs_writebp() with the force argument set to 1. 3129 */ 3130 int 3131 nfs_bwrite(v) 3132 void *v; 3133 { 3134 struct vop_bwrite_args /* { 3135 struct vnode *a_bp; 3136 } */ *ap = v; 3137 3138 return (nfs_writebp(ap->a_bp, 1)); 3139 } 3140 3141 /* 3142 * This is a clone of vn_bwrite(), except that B_WRITEINPROG isn't set unless 3143 * the force flag is one and it also handles the B_NEEDCOMMIT flag. 3144 */ 3145 int 3146 nfs_writebp(bp, force) 3147 struct buf *bp; 3148 int force; 3149 { 3150 int oldflags = bp->b_flags, retv = 1, s; 3151 struct proc *p = curproc; /* XXX */ 3152 off_t off; 3153 3154 if(!(bp->b_flags & B_BUSY)) 3155 panic("bwrite: buffer is not busy???"); 3156 3157 #ifdef fvdl_debug 3158 printf("nfs_writebp(%x): vp %x voff %d vend %d doff %d dend %d\n", 3159 bp, bp->b_vp, bp->b_validoff, bp->b_validend, bp->b_dirtyoff, 3160 bp->b_dirtyend); 3161 #endif 3162 bp->b_flags &= ~(B_READ|B_DONE|B_ERROR|B_DELWRI|B_AGE); 3163 3164 s = splbio(); 3165 if (oldflags & B_ASYNC) { 3166 if (oldflags & B_DELWRI) { 3167 reassignbuf(bp, bp->b_vp); 3168 } else if (p) { 3169 ++p->p_stats->p_ru.ru_oublock; 3170 } 3171 } 3172 bp->b_vp->v_numoutput++; 3173 splx(s); 3174 3175 /* 3176 * If B_NEEDCOMMIT is set, a commit rpc may do the trick. If not 3177 * an actual write will have to be scheduled via. VOP_STRATEGY(). 3178 * If B_WRITEINPROG is already set, then push it with a write anyhow. 3179 */ 3180 if ((oldflags & (B_NEEDCOMMIT | B_WRITEINPROG)) == B_NEEDCOMMIT) { 3181 off = ((u_quad_t)bp->b_blkno) * DEV_BSIZE + bp->b_dirtyoff; 3182 bp->b_flags |= B_WRITEINPROG; 3183 retv = nfs_commit(bp->b_vp, off, bp->b_dirtyend-bp->b_dirtyoff, 3184 bp->b_wcred, bp->b_proc); 3185 bp->b_flags &= ~B_WRITEINPROG; 3186 if (!retv) { 3187 bp->b_dirtyoff = bp->b_dirtyend = 0; 3188 bp->b_flags &= ~B_NEEDCOMMIT; 3189 biodone(bp); 3190 } else if (retv == NFSERR_STALEWRITEVERF) 3191 nfs_clearcommit(bp->b_vp->v_mount); 3192 } 3193 if (retv) { 3194 if (force) 3195 bp->b_flags |= B_WRITEINPROG; 3196 VOP_STRATEGY(bp); 3197 } 3198 3199 if( (oldflags & B_ASYNC) == 0) { 3200 int rtval = biowait(bp); 3201 if (oldflags & B_DELWRI) { 3202 s = splbio(); 3203 reassignbuf(bp, bp->b_vp); 3204 splx(s); 3205 } else if (p) { 3206 ++p->p_stats->p_ru.ru_oublock; 3207 } 3208 brelse(bp); 3209 return (rtval); 3210 } 3211 3212 return (0); 3213 } 3214 3215 /* 3216 * nfs special file access vnode op. 3217 * Essentially just get vattr and then imitate iaccess() since the device is 3218 * local to the client. 3219 */ 3220 int 3221 nfsspec_access(v) 3222 void *v; 3223 { 3224 struct vop_access_args /* { 3225 struct vnode *a_vp; 3226 int a_mode; 3227 struct ucred *a_cred; 3228 struct proc *a_p; 3229 } */ *ap = v; 3230 struct vattr va; 3231 struct vnode *vp = ap->a_vp; 3232 int error; 3233 3234 error = VOP_GETATTR(vp, &va, ap->a_cred, ap->a_p); 3235 if (error) 3236 return (error); 3237 3238 /* 3239 * Disallow write attempts on filesystems mounted read-only; 3240 * unless the file is a socket, fifo, or a block or character 3241 * device resident on the filesystem. 3242 */ 3243 if ((ap->a_mode & VWRITE) && (vp->v_mount->mnt_flag & MNT_RDONLY)) { 3244 switch (vp->v_type) { 3245 case VREG: 3246 case VDIR: 3247 case VLNK: 3248 return (EROFS); 3249 default: 3250 break; 3251 } 3252 } 3253 3254 return (vaccess(va.va_type, va.va_mode, 3255 va.va_uid, va.va_gid, ap->a_mode, ap->a_cred)); 3256 } 3257 3258 /* 3259 * Read wrapper for special devices. 3260 */ 3261 int 3262 nfsspec_read(v) 3263 void *v; 3264 { 3265 struct vop_read_args /* { 3266 struct vnode *a_vp; 3267 struct uio *a_uio; 3268 int a_ioflag; 3269 struct ucred *a_cred; 3270 } */ *ap = v; 3271 struct nfsnode *np = VTONFS(ap->a_vp); 3272 3273 /* 3274 * Set access flag. 3275 */ 3276 np->n_flag |= NACC; 3277 np->n_atim.tv_sec = time.tv_sec; 3278 np->n_atim.tv_nsec = time.tv_usec * 1000; 3279 return (VOCALL(spec_vnodeop_p, VOFFSET(vop_read), ap)); 3280 } 3281 3282 /* 3283 * Write wrapper for special devices. 3284 */ 3285 int 3286 nfsspec_write(v) 3287 void *v; 3288 { 3289 struct vop_write_args /* { 3290 struct vnode *a_vp; 3291 struct uio *a_uio; 3292 int a_ioflag; 3293 struct ucred *a_cred; 3294 } */ *ap = v; 3295 struct nfsnode *np = VTONFS(ap->a_vp); 3296 3297 /* 3298 * Set update flag. 3299 */ 3300 np->n_flag |= NUPD; 3301 np->n_mtim.tv_sec = time.tv_sec; 3302 np->n_mtim.tv_nsec = time.tv_usec * 1000; 3303 return (VOCALL(spec_vnodeop_p, VOFFSET(vop_write), ap)); 3304 } 3305 3306 /* 3307 * Close wrapper for special devices. 3308 * 3309 * Update the times on the nfsnode then do device close. 3310 */ 3311 int 3312 nfsspec_close(v) 3313 void *v; 3314 { 3315 struct vop_close_args /* { 3316 struct vnode *a_vp; 3317 int a_fflag; 3318 struct ucred *a_cred; 3319 struct proc *a_p; 3320 } */ *ap = v; 3321 struct vnode *vp = ap->a_vp; 3322 struct nfsnode *np = VTONFS(vp); 3323 struct vattr vattr; 3324 3325 if (np->n_flag & (NACC | NUPD)) { 3326 np->n_flag |= NCHG; 3327 if (vp->v_usecount == 1 && 3328 (vp->v_mount->mnt_flag & MNT_RDONLY) == 0) { 3329 VATTR_NULL(&vattr); 3330 if (np->n_flag & NACC) 3331 vattr.va_atime = np->n_atim; 3332 if (np->n_flag & NUPD) 3333 vattr.va_mtime = np->n_mtim; 3334 (void)VOP_SETATTR(vp, &vattr, ap->a_cred, ap->a_p); 3335 } 3336 } 3337 return (VOCALL(spec_vnodeop_p, VOFFSET(vop_close), ap)); 3338 } 3339 3340 /* 3341 * Read wrapper for fifos. 3342 */ 3343 int 3344 nfsfifo_read(v) 3345 void *v; 3346 { 3347 struct vop_read_args /* { 3348 struct vnode *a_vp; 3349 struct uio *a_uio; 3350 int a_ioflag; 3351 struct ucred *a_cred; 3352 } */ *ap = v; 3353 struct nfsnode *np = VTONFS(ap->a_vp); 3354 3355 /* 3356 * Set access flag. 3357 */ 3358 np->n_flag |= NACC; 3359 np->n_atim.tv_sec = time.tv_sec; 3360 np->n_atim.tv_nsec = time.tv_usec * 1000; 3361 return (VOCALL(fifo_vnodeop_p, VOFFSET(vop_read), ap)); 3362 } 3363 3364 /* 3365 * Write wrapper for fifos. 3366 */ 3367 int 3368 nfsfifo_write(v) 3369 void *v; 3370 { 3371 struct vop_write_args /* { 3372 struct vnode *a_vp; 3373 struct uio *a_uio; 3374 int a_ioflag; 3375 struct ucred *a_cred; 3376 } */ *ap = v; 3377 struct nfsnode *np = VTONFS(ap->a_vp); 3378 3379 /* 3380 * Set update flag. 3381 */ 3382 np->n_flag |= NUPD; 3383 np->n_mtim.tv_sec = time.tv_sec; 3384 np->n_mtim.tv_nsec = time.tv_usec * 1000; 3385 return (VOCALL(fifo_vnodeop_p, VOFFSET(vop_write), ap)); 3386 } 3387 3388 /* 3389 * Close wrapper for fifos. 3390 * 3391 * Update the times on the nfsnode then do fifo close. 3392 */ 3393 int 3394 nfsfifo_close(v) 3395 void *v; 3396 { 3397 struct vop_close_args /* { 3398 struct vnode *a_vp; 3399 int a_fflag; 3400 struct ucred *a_cred; 3401 struct proc *a_p; 3402 } */ *ap = v; 3403 struct vnode *vp = ap->a_vp; 3404 struct nfsnode *np = VTONFS(vp); 3405 struct vattr vattr; 3406 3407 if (np->n_flag & (NACC | NUPD)) { 3408 if (np->n_flag & NACC) { 3409 np->n_atim.tv_sec = time.tv_sec; 3410 np->n_atim.tv_nsec = time.tv_usec * 1000; 3411 } 3412 if (np->n_flag & NUPD) { 3413 np->n_mtim.tv_sec = time.tv_sec; 3414 np->n_mtim.tv_nsec = time.tv_usec * 1000; 3415 } 3416 np->n_flag |= NCHG; 3417 if (vp->v_usecount == 1 && 3418 (vp->v_mount->mnt_flag & MNT_RDONLY) == 0) { 3419 VATTR_NULL(&vattr); 3420 if (np->n_flag & NACC) 3421 vattr.va_atime = np->n_atim; 3422 if (np->n_flag & NUPD) 3423 vattr.va_mtime = np->n_mtim; 3424 (void)VOP_SETATTR(vp, &vattr, ap->a_cred, ap->a_p); 3425 } 3426 } 3427 return (VOCALL(fifo_vnodeop_p, VOFFSET(vop_close), ap)); 3428 } 3429
Indexes created Fri Oct 17 23:09:53 GMT 2025