nfs_vnops.c revision 1.100.4.1
1 /* $NetBSD: nfs_vnops.c,v 1.100.4.1 1999/06/07 04:25:32 chs Exp $ */ 2 3 /* 4 * Copyright (c) 1989, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * This code is derived from software contributed to Berkeley by 8 * Rick Macklem at The University of Guelph. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the University of 21 * California, Berkeley and its contributors. 22 * 4. Neither the name of the University nor the names of its contributors 23 * may be used to endorse or promote products derived from this software 24 * without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 27 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 28 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 29 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 30 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 31 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 32 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 33 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 34 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 35 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 36 * SUCH DAMAGE. 37 * 38 * @(#)nfs_vnops.c 8.19 (Berkeley) 7/31/95 39 */ 40 41 /* 42 * vnode op calls for Sun NFS version 2 and 3 43 */ 44 45 #include <sys/param.h> 46 #include <sys/proc.h> 47 #include <sys/kernel.h> 48 #include <sys/systm.h> 49 #include <sys/resourcevar.h> 50 #include <sys/proc.h> 51 #include <sys/mount.h> 52 #include <sys/buf.h> 53 #include <sys/malloc.h> 54 #include <sys/mbuf.h> 55 #include <sys/conf.h> 56 #include <sys/namei.h> 57 #include <sys/vnode.h> 58 #include <sys/dirent.h> 59 #include <sys/fcntl.h> 60 #include <sys/lockf.h> 61 #include <sys/stat.h> 62 #include <sys/unistd.h> 63 64 #include <vm/vm.h> 65 66 #include <uvm/uvm_extern.h> 67 68 #include <miscfs/fifofs/fifo.h> 69 #include <miscfs/genfs/genfs.h> 70 #include <miscfs/specfs/specdev.h> 71 72 #include <nfs/rpcv2.h> 73 #include <nfs/nfsproto.h> 74 #include <nfs/nfs.h> 75 #include <nfs/nfsnode.h> 76 #include <nfs/nfsmount.h> 77 #include <nfs/xdr_subs.h> 78 #include <nfs/nfsm_subs.h> 79 #include <nfs/nqnfs.h> 80 #include <nfs/nfs_var.h> 81 82 #include <net/if.h> 83 #include <netinet/in.h> 84 #include <netinet/in_var.h> 85 86 /* Defs */ 87 #define TRUE 1 88 #define FALSE 0 89 90 /* 91 * Global vfs data structures for nfs 92 */ 93 int (**nfsv2_vnodeop_p) __P((void *)); 94 struct vnodeopv_entry_desc nfsv2_vnodeop_entries[] = { 95 { &vop_default_desc, vn_default_error }, 96 { &vop_lookup_desc, nfs_lookup }, /* lookup */ 97 { &vop_create_desc, nfs_create }, /* create */ 98 { &vop_mknod_desc, nfs_mknod }, /* mknod */ 99 { &vop_open_desc, nfs_open }, /* open */ 100 { &vop_close_desc, nfs_close }, /* close */ 101 { &vop_access_desc, nfs_access }, /* access */ 102 { &vop_getattr_desc, nfs_getattr }, /* getattr */ 103 { &vop_setattr_desc, nfs_setattr }, /* setattr */ 104 { &vop_read_desc, nfs_read }, /* read */ 105 { &vop_write_desc, nfs_write }, /* write */ 106 { &vop_lease_desc, nfs_lease_check }, /* lease */ 107 { &vop_ioctl_desc, nfs_ioctl }, /* ioctl */ 108 { &vop_poll_desc, nfs_poll }, /* poll */ 109 { &vop_revoke_desc, nfs_revoke }, /* revoke */ 110 { &vop_mmap_desc, nfs_mmap }, /* mmap */ 111 { &vop_fsync_desc, nfs_fsync }, /* fsync */ 112 { &vop_seek_desc, nfs_seek }, /* seek */ 113 { &vop_remove_desc, nfs_remove }, /* remove */ 114 { &vop_link_desc, nfs_link }, /* link */ 115 { &vop_rename_desc, nfs_rename }, /* rename */ 116 { &vop_mkdir_desc, nfs_mkdir }, /* mkdir */ 117 { &vop_rmdir_desc, nfs_rmdir }, /* rmdir */ 118 { &vop_symlink_desc, nfs_symlink }, /* symlink */ 119 { &vop_readdir_desc, nfs_readdir }, /* readdir */ 120 { &vop_readlink_desc, nfs_readlink }, /* readlink */ 121 { &vop_abortop_desc, nfs_abortop }, /* abortop */ 122 { &vop_inactive_desc, nfs_inactive }, /* inactive */ 123 { &vop_reclaim_desc, nfs_reclaim }, /* reclaim */ 124 { &vop_lock_desc, nfs_lock }, /* lock */ 125 { &vop_unlock_desc, nfs_unlock }, /* unlock */ 126 { &vop_bmap_desc, nfs_bmap }, /* bmap */ 127 { &vop_strategy_desc, nfs_strategy }, /* strategy */ 128 { &vop_print_desc, nfs_print }, /* print */ 129 { &vop_islocked_desc, nfs_islocked }, /* islocked */ 130 { &vop_pathconf_desc, nfs_pathconf }, /* pathconf */ 131 { &vop_advlock_desc, nfs_advlock }, /* advlock */ 132 { &vop_blkatoff_desc, nfs_blkatoff }, /* blkatoff */ 133 { &vop_valloc_desc, nfs_valloc }, /* valloc */ 134 { &vop_reallocblks_desc, nfs_reallocblks }, /* reallocblks */ 135 { &vop_vfree_desc, nfs_vfree }, /* vfree */ 136 { &vop_truncate_desc, nfs_truncate }, /* truncate */ 137 { &vop_update_desc, nfs_update }, /* update */ 138 { &vop_bwrite_desc, nfs_bwrite }, /* bwrite */ 139 { &vop_getpages_desc, nfs_getpages }, /* getpages */ 140 { &vop_putpages_desc, nfs_putpages }, /* putpages */ 141 { NULL, NULL } 142 }; 143 struct vnodeopv_desc nfsv2_vnodeop_opv_desc = 144 { &nfsv2_vnodeop_p, nfsv2_vnodeop_entries }; 145 146 /* 147 * Special device vnode ops 148 */ 149 int (**spec_nfsv2nodeop_p) __P((void *)); 150 struct vnodeopv_entry_desc spec_nfsv2nodeop_entries[] = { 151 { &vop_default_desc, vn_default_error }, 152 { &vop_lookup_desc, spec_lookup }, /* lookup */ 153 { &vop_create_desc, spec_create }, /* create */ 154 { &vop_mknod_desc, spec_mknod }, /* mknod */ 155 { &vop_open_desc, spec_open }, /* open */ 156 { &vop_close_desc, nfsspec_close }, /* close */ 157 { &vop_access_desc, nfsspec_access }, /* access */ 158 { &vop_getattr_desc, nfs_getattr }, /* getattr */ 159 { &vop_setattr_desc, nfs_setattr }, /* setattr */ 160 { &vop_read_desc, nfsspec_read }, /* read */ 161 { &vop_write_desc, nfsspec_write }, /* write */ 162 { &vop_lease_desc, spec_lease_check }, /* lease */ 163 { &vop_ioctl_desc, spec_ioctl }, /* ioctl */ 164 { &vop_poll_desc, spec_poll }, /* poll */ 165 { &vop_revoke_desc, spec_revoke }, /* revoke */ 166 { &vop_mmap_desc, spec_mmap }, /* mmap */ 167 { &vop_fsync_desc, nfs_fsync }, /* fsync */ 168 { &vop_seek_desc, spec_seek }, /* seek */ 169 { &vop_remove_desc, spec_remove }, /* remove */ 170 { &vop_link_desc, spec_link }, /* link */ 171 { &vop_rename_desc, spec_rename }, /* rename */ 172 { &vop_mkdir_desc, spec_mkdir }, /* mkdir */ 173 { &vop_rmdir_desc, spec_rmdir }, /* rmdir */ 174 { &vop_symlink_desc, spec_symlink }, /* symlink */ 175 { &vop_readdir_desc, spec_readdir }, /* readdir */ 176 { &vop_readlink_desc, spec_readlink }, /* readlink */ 177 { &vop_abortop_desc, spec_abortop }, /* abortop */ 178 { &vop_inactive_desc, nfs_inactive }, /* inactive */ 179 { &vop_reclaim_desc, nfs_reclaim }, /* reclaim */ 180 { &vop_lock_desc, nfs_lock }, /* lock */ 181 { &vop_unlock_desc, nfs_unlock }, /* unlock */ 182 { &vop_bmap_desc, spec_bmap }, /* bmap */ 183 { &vop_strategy_desc, spec_strategy }, /* strategy */ 184 { &vop_print_desc, nfs_print }, /* print */ 185 { &vop_islocked_desc, nfs_islocked }, /* islocked */ 186 { &vop_pathconf_desc, spec_pathconf }, /* pathconf */ 187 { &vop_advlock_desc, spec_advlock }, /* advlock */ 188 { &vop_blkatoff_desc, spec_blkatoff }, /* blkatoff */ 189 { &vop_valloc_desc, spec_valloc }, /* valloc */ 190 { &vop_reallocblks_desc, spec_reallocblks }, /* reallocblks */ 191 { &vop_vfree_desc, spec_vfree }, /* vfree */ 192 { &vop_truncate_desc, spec_truncate }, /* truncate */ 193 { &vop_update_desc, nfs_update }, /* update */ 194 { &vop_bwrite_desc, vn_bwrite }, /* bwrite */ 195 { (struct vnodeop_desc*)NULL, (int(*) __P((void *)))NULL } 196 }; 197 struct vnodeopv_desc spec_nfsv2nodeop_opv_desc = 198 { &spec_nfsv2nodeop_p, spec_nfsv2nodeop_entries }; 199 200 int (**fifo_nfsv2nodeop_p) __P((void *)); 201 struct vnodeopv_entry_desc fifo_nfsv2nodeop_entries[] = { 202 { &vop_default_desc, vn_default_error }, 203 { &vop_lookup_desc, fifo_lookup }, /* lookup */ 204 { &vop_create_desc, fifo_create }, /* create */ 205 { &vop_mknod_desc, fifo_mknod }, /* mknod */ 206 { &vop_open_desc, fifo_open }, /* open */ 207 { &vop_close_desc, nfsfifo_close }, /* close */ 208 { &vop_access_desc, nfsspec_access }, /* access */ 209 { &vop_getattr_desc, nfs_getattr }, /* getattr */ 210 { &vop_setattr_desc, nfs_setattr }, /* setattr */ 211 { &vop_read_desc, nfsfifo_read }, /* read */ 212 { &vop_write_desc, nfsfifo_write }, /* write */ 213 { &vop_lease_desc, fifo_lease_check }, /* lease */ 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 register struct vnode *vp = ap->a_vp; 299 register u_int32_t *tl; 300 register caddr_t cp; 301 register int32_t t1, t2; 302 caddr_t bpos, dpos, cp2; 303 int error = 0, attrflag; 304 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 305 u_int32_t mode, rmode; 306 int v3 = NFS_ISV3(vp); 307 308 /* 309 * For nfs v3, do an access rpc, otherwise you are stuck emulating 310 * ufs_access() locally using the vattr. This may not be correct, 311 * since the server may apply other access criteria such as 312 * client uid-->server uid mapping that we do not know about, but 313 * this is better than just returning anything that is lying about 314 * in the cache. 315 */ 316 if (v3) { 317 nfsstats.rpccnt[NFSPROC_ACCESS]++; 318 nfsm_reqhead(vp, NFSPROC_ACCESS, NFSX_FH(v3) + NFSX_UNSIGNED); 319 nfsm_fhtom(vp, v3); 320 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); 321 if (ap->a_mode & VREAD) 322 mode = NFSV3ACCESS_READ; 323 else 324 mode = 0; 325 if (vp->v_type != VDIR) { 326 if (ap->a_mode & VWRITE) 327 mode |= (NFSV3ACCESS_MODIFY | NFSV3ACCESS_EXTEND); 328 if (ap->a_mode & VEXEC) 329 mode |= NFSV3ACCESS_EXECUTE; 330 } else { 331 if (ap->a_mode & VWRITE) 332 mode |= (NFSV3ACCESS_MODIFY | NFSV3ACCESS_EXTEND | 333 NFSV3ACCESS_DELETE); 334 if (ap->a_mode & VEXEC) 335 mode |= NFSV3ACCESS_LOOKUP; 336 } 337 *tl = txdr_unsigned(mode); 338 nfsm_request(vp, NFSPROC_ACCESS, ap->a_p, ap->a_cred); 339 nfsm_postop_attr(vp, attrflag); 340 if (!error) { 341 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 342 rmode = fxdr_unsigned(u_int32_t, *tl); 343 /* 344 * The NFS V3 spec does not clarify whether or not 345 * the returned access bits can be a superset of 346 * the ones requested, so... 347 */ 348 if ((rmode & mode) != mode) 349 error = EACCES; 350 } 351 nfsm_reqdone; 352 if (error) 353 return (error); 354 } else 355 return (nfsspec_access(ap)); 356 /* 357 * Disallow write attempts on filesystems mounted read-only; 358 * unless the file is a socket, fifo, or a block or character 359 * device resident on the filesystem. 360 */ 361 if ((ap->a_mode & VWRITE) && (vp->v_mount->mnt_flag & MNT_RDONLY)) { 362 switch (vp->v_type) { 363 case VREG: 364 case VDIR: 365 case VLNK: 366 return (EROFS); 367 default: 368 break; 369 } 370 } 371 return (0); 372 } 373 374 /* 375 * nfs open vnode op 376 * Check to see if the type is ok 377 * and that deletion is not in progress. 378 * For paged in text files, you will need to flush the page cache 379 * if consistency is lost. 380 */ 381 /* ARGSUSED */ 382 int 383 nfs_open(v) 384 void *v; 385 { 386 struct vop_open_args /* { 387 struct vnode *a_vp; 388 int a_mode; 389 struct ucred *a_cred; 390 struct proc *a_p; 391 } */ *ap = v; 392 register struct vnode *vp = ap->a_vp; 393 struct nfsnode *np = VTONFS(vp); 394 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 395 struct vattr vattr; 396 int error; 397 398 if (vp->v_type != VREG && vp->v_type != VDIR && vp->v_type != VLNK) { 399 #ifdef DIAGNOSTIC 400 printf("open eacces vtyp=%d\n",vp->v_type); 401 #endif 402 return (EACCES); 403 } 404 /* 405 * Get a valid lease. If cached data is stale, flush it. 406 */ 407 if (nmp->nm_flag & NFSMNT_NQNFS) { 408 if (NQNFS_CKINVALID(vp, np, ND_READ)) { 409 do { 410 error = nqnfs_getlease(vp, ND_READ, ap->a_cred, 411 ap->a_p); 412 } while (error == NQNFS_EXPIRED); 413 if (error) 414 return (error); 415 if (np->n_lrev != np->n_brev || 416 (np->n_flag & NQNFSNONCACHE)) { 417 if ((error = nfs_vinvalbuf(vp, V_SAVE, ap->a_cred, 418 ap->a_p, 1)) == EINTR) 419 return (error); 420 (void) uvm_vnp_uncache(vp); 421 np->n_brev = np->n_lrev; 422 } 423 } 424 } else { 425 if (np->n_flag & NMODIFIED) { 426 if ((error = nfs_vinvalbuf(vp, V_SAVE, ap->a_cred, 427 ap->a_p, 1)) == EINTR) 428 return (error); 429 (void) uvm_vnp_uncache(vp); 430 np->n_attrstamp = 0; 431 if (vp->v_type == VDIR) { 432 nfs_invaldircache(vp, 0); 433 np->n_direofoffset = 0; 434 } 435 error = VOP_GETATTR(vp, &vattr, ap->a_cred, ap->a_p); 436 if (error) 437 return (error); 438 np->n_mtime = vattr.va_mtime.tv_sec; 439 } else { 440 error = VOP_GETATTR(vp, &vattr, ap->a_cred, ap->a_p); 441 if (error) 442 return (error); 443 if (np->n_mtime != vattr.va_mtime.tv_sec) { 444 if (vp->v_type == VDIR) { 445 nfs_invaldircache(vp, 0); 446 np->n_direofoffset = 0; 447 } 448 if ((error = nfs_vinvalbuf(vp, V_SAVE, 449 ap->a_cred, ap->a_p, 1)) == EINTR) 450 return (error); 451 (void) uvm_vnp_uncache(vp); 452 np->n_mtime = vattr.va_mtime.tv_sec; 453 } 454 } 455 } 456 if ((nmp->nm_flag & NFSMNT_NQNFS) == 0) 457 np->n_attrstamp = 0; /* For Open/Close consistency */ 458 return (0); 459 } 460 461 /* 462 * nfs close vnode op 463 * What an NFS client should do upon close after writing is a debatable issue. 464 * Most NFS clients push delayed writes to the server upon close, basically for 465 * two reasons: 466 * 1 - So that any write errors may be reported back to the client process 467 * doing the close system call. By far the two most likely errors are 468 * NFSERR_NOSPC and NFSERR_DQUOT to indicate space allocation failure. 469 * 2 - To put a worst case upper bound on cache inconsistency between 470 * multiple clients for the file. 471 * There is also a consistency problem for Version 2 of the protocol w.r.t. 472 * not being able to tell if other clients are writing a file concurrently, 473 * since there is no way of knowing if the changed modify time in the reply 474 * is only due to the write for this client. 475 * (NFS Version 3 provides weak cache consistency data in the reply that 476 * should be sufficient to detect and handle this case.) 477 * 478 * The current code does the following: 479 * for NFS Version 2 - play it safe and flush/invalidate all dirty buffers 480 * for NFS Version 3 - flush dirty buffers to the server but don't invalidate 481 * or commit them (this satisfies 1 and 2 except for the 482 * case where the server crashes after this close but 483 * before the commit RPC, which is felt to be "good 484 * enough". Changing the last argument to nfs_flush() to 485 * a 1 would force a commit operation, if it is felt a 486 * commit is necessary now. 487 * for NQNFS - do nothing now, since 2 is dealt with via leases and 488 * 1 should be dealt with via an fsync() system call for 489 * cases where write errors are important. 490 */ 491 /* ARGSUSED */ 492 int 493 nfs_close(v) 494 void *v; 495 { 496 struct vop_close_args /* { 497 struct vnodeop_desc *a_desc; 498 struct vnode *a_vp; 499 int a_fflag; 500 struct ucred *a_cred; 501 struct proc *a_p; 502 } */ *ap = v; 503 register struct vnode *vp = ap->a_vp; 504 register struct nfsnode *np = VTONFS(vp); 505 int error = 0; 506 507 if (vp->v_type == VREG) { 508 if ((VFSTONFS(vp->v_mount)->nm_flag & NFSMNT_NQNFS) == 0 && 509 (np->n_flag & NMODIFIED)) { 510 if (NFS_ISV3(vp)) { 511 error = nfs_flush(vp, ap->a_cred, MNT_WAIT, ap->a_p, 0); 512 np->n_flag &= ~NMODIFIED; 513 } else 514 error = nfs_vinvalbuf(vp, V_SAVE, ap->a_cred, ap->a_p, 1); 515 np->n_attrstamp = 0; 516 } 517 if (np->n_flag & NWRITEERR) { 518 np->n_flag &= ~NWRITEERR; 519 error = np->n_error; 520 } 521 } 522 return (error); 523 } 524 525 /* 526 * nfs getattr call from vfs. 527 */ 528 int 529 nfs_getattr(v) 530 void *v; 531 { 532 struct vop_getattr_args /* { 533 struct vnode *a_vp; 534 struct vattr *a_vap; 535 struct ucred *a_cred; 536 struct proc *a_p; 537 } */ *ap = v; 538 register struct vnode *vp = ap->a_vp; 539 register struct nfsnode *np = VTONFS(vp); 540 register caddr_t cp; 541 register u_int32_t *tl; 542 register int32_t t1, t2; 543 caddr_t bpos, dpos; 544 int error = 0; 545 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 546 int v3 = NFS_ISV3(vp); 547 548 /* 549 * Update local times for special files. 550 */ 551 if (np->n_flag & (NACC | NUPD)) 552 np->n_flag |= NCHG; 553 /* 554 * First look in the cache. 555 */ 556 if (nfs_getattrcache(vp, ap->a_vap) == 0) 557 return (0); 558 nfsstats.rpccnt[NFSPROC_GETATTR]++; 559 nfsm_reqhead(vp, NFSPROC_GETATTR, NFSX_FH(v3)); 560 nfsm_fhtom(vp, v3); 561 nfsm_request(vp, NFSPROC_GETATTR, ap->a_p, ap->a_cred); 562 if (!error) { 563 nfsm_loadattr(vp, ap->a_vap); 564 if (vp->v_type == VDIR && 565 ap->a_vap->va_blocksize < NFS_DIRFRAGSIZ) 566 ap->a_vap->va_blocksize = NFS_DIRFRAGSIZ; 567 } 568 nfsm_reqdone; 569 return (error); 570 } 571 572 /* 573 * nfs setattr call. 574 */ 575 int 576 nfs_setattr(v) 577 void *v; 578 { 579 struct vop_setattr_args /* { 580 struct vnodeop_desc *a_desc; 581 struct vnode *a_vp; 582 struct vattr *a_vap; 583 struct ucred *a_cred; 584 struct proc *a_p; 585 } */ *ap = v; 586 register struct vnode *vp = ap->a_vp; 587 register struct nfsnode *np = VTONFS(vp); 588 register struct vattr *vap = ap->a_vap; 589 int error = 0; 590 u_quad_t tsize = 0; 591 592 /* 593 * Setting of flags is not supported. 594 */ 595 if (vap->va_flags != VNOVAL) 596 return (EOPNOTSUPP); 597 598 /* 599 * Disallow write attempts if the filesystem is mounted read-only. 600 */ 601 if ((vap->va_uid != (uid_t)VNOVAL || 602 vap->va_gid != (gid_t)VNOVAL || vap->va_atime.tv_sec != VNOVAL || 603 vap->va_mtime.tv_sec != VNOVAL || vap->va_mode != (mode_t)VNOVAL) && 604 (vp->v_mount->mnt_flag & MNT_RDONLY)) 605 return (EROFS); 606 if (vap->va_size != VNOVAL) { 607 switch (vp->v_type) { 608 case VDIR: 609 return (EISDIR); 610 case VCHR: 611 case VBLK: 612 case VSOCK: 613 case VFIFO: 614 if (vap->va_mtime.tv_sec == VNOVAL && 615 vap->va_atime.tv_sec == VNOVAL && 616 vap->va_mode == (mode_t)VNOVAL && 617 vap->va_uid == (uid_t)VNOVAL && 618 vap->va_gid == (gid_t)VNOVAL) 619 return (0); 620 vap->va_size = VNOVAL; 621 break; 622 default: 623 /* 624 * Disallow write attempts if the filesystem is 625 * mounted read-only. 626 */ 627 if (vp->v_mount->mnt_flag & MNT_RDONLY) 628 return (EROFS); 629 uvm_vnp_setsize(vp, vap->va_size); 630 if (vap->va_size == 0) 631 error = nfs_vinvalbuf(vp, 0, 632 ap->a_cred, ap->a_p, 1); 633 else 634 error = nfs_vinvalbuf(vp, V_SAVE, 635 ap->a_cred, ap->a_p, 1); 636 if (error) { 637 uvm_vnp_setsize(vp, np->n_size); 638 return (error); 639 } 640 tsize = np->n_size; 641 np->n_size = np->n_vattr->va_size = vap->va_size; 642 } 643 } else if ((vap->va_mtime.tv_sec != VNOVAL || 644 vap->va_atime.tv_sec != VNOVAL) && 645 vp->v_type == VREG && 646 (error = nfs_vinvalbuf(vp, V_SAVE, ap->a_cred, 647 ap->a_p, 1)) == EINTR) 648 return (error); 649 error = nfs_setattrrpc(vp, vap, ap->a_cred, ap->a_p); 650 if (error && vap->va_size != VNOVAL) { 651 np->n_size = np->n_vattr->va_size = tsize; 652 uvm_vnp_setsize(vp, np->n_size); 653 } 654 return (error); 655 } 656 657 /* 658 * Do an nfs setattr rpc. 659 */ 660 int 661 nfs_setattrrpc(vp, vap, cred, procp) 662 register struct vnode *vp; 663 register struct vattr *vap; 664 struct ucred *cred; 665 struct proc *procp; 666 { 667 register struct nfsv2_sattr *sp; 668 register caddr_t cp; 669 register int32_t t1, t2; 670 caddr_t bpos, dpos, cp2; 671 u_int32_t *tl; 672 int error = 0, wccflag = NFSV3_WCCRATTR; 673 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 674 int v3 = NFS_ISV3(vp); 675 676 nfsstats.rpccnt[NFSPROC_SETATTR]++; 677 nfsm_reqhead(vp, NFSPROC_SETATTR, NFSX_FH(v3) + NFSX_SATTR(v3)); 678 nfsm_fhtom(vp, v3); 679 if (v3) { 680 if (vap->va_mode != (mode_t)VNOVAL) { 681 nfsm_build(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 682 *tl++ = nfs_true; 683 *tl = txdr_unsigned(vap->va_mode); 684 } else { 685 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); 686 *tl = nfs_false; 687 } 688 if (vap->va_uid != (uid_t)VNOVAL) { 689 nfsm_build(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 690 *tl++ = nfs_true; 691 *tl = txdr_unsigned(vap->va_uid); 692 } else { 693 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); 694 *tl = nfs_false; 695 } 696 if (vap->va_gid != (gid_t)VNOVAL) { 697 nfsm_build(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 698 *tl++ = nfs_true; 699 *tl = txdr_unsigned(vap->va_gid); 700 } else { 701 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); 702 *tl = nfs_false; 703 } 704 if (vap->va_size != VNOVAL) { 705 nfsm_build(tl, u_int32_t *, 3 * NFSX_UNSIGNED); 706 *tl++ = nfs_true; 707 txdr_hyper(vap->va_size, tl); 708 } else { 709 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); 710 *tl = nfs_false; 711 } 712 if (vap->va_atime.tv_sec != VNOVAL) { 713 if (vap->va_atime.tv_sec != time.tv_sec) { 714 nfsm_build(tl, u_int32_t *, 3 * NFSX_UNSIGNED); 715 *tl++ = txdr_unsigned(NFSV3SATTRTIME_TOCLIENT); 716 txdr_nfsv3time(&vap->va_atime, tl); 717 } else { 718 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); 719 *tl = txdr_unsigned(NFSV3SATTRTIME_TOSERVER); 720 } 721 } else { 722 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); 723 *tl = txdr_unsigned(NFSV3SATTRTIME_DONTCHANGE); 724 } 725 if (vap->va_mtime.tv_sec != VNOVAL) { 726 if (vap->va_mtime.tv_sec != time.tv_sec) { 727 nfsm_build(tl, u_int32_t *, 3 * NFSX_UNSIGNED); 728 *tl++ = txdr_unsigned(NFSV3SATTRTIME_TOCLIENT); 729 txdr_nfsv3time(&vap->va_mtime, tl); 730 } else { 731 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); 732 *tl = txdr_unsigned(NFSV3SATTRTIME_TOSERVER); 733 } 734 } else { 735 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); 736 *tl = txdr_unsigned(NFSV3SATTRTIME_DONTCHANGE); 737 } 738 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); 739 *tl = nfs_false; 740 } else { 741 nfsm_build(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 742 if (vap->va_mode == (mode_t)VNOVAL) 743 sp->sa_mode = nfs_xdrneg1; 744 else 745 sp->sa_mode = vtonfsv2_mode(vp->v_type, vap->va_mode); 746 if (vap->va_uid == (uid_t)VNOVAL) 747 sp->sa_uid = nfs_xdrneg1; 748 else 749 sp->sa_uid = txdr_unsigned(vap->va_uid); 750 if (vap->va_gid == (gid_t)VNOVAL) 751 sp->sa_gid = nfs_xdrneg1; 752 else 753 sp->sa_gid = txdr_unsigned(vap->va_gid); 754 sp->sa_size = txdr_unsigned(vap->va_size); 755 txdr_nfsv2time(&vap->va_atime, &sp->sa_atime); 756 txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime); 757 } 758 nfsm_request(vp, NFSPROC_SETATTR, procp, cred); 759 if (v3) { 760 nfsm_wcc_data(vp, wccflag); 761 } else 762 nfsm_loadattr(vp, (struct vattr *)0); 763 nfsm_reqdone; 764 return (error); 765 } 766 767 /* 768 * nfs lookup call, one step at a time... 769 * First look in cache 770 * If not found, unlock the directory nfsnode and do the rpc 771 */ 772 int 773 nfs_lookup(v) 774 void *v; 775 { 776 struct vop_lookup_args /* { 777 struct vnodeop_desc *a_desc; 778 struct vnode *a_dvp; 779 struct vnode **a_vpp; 780 struct componentname *a_cnp; 781 } */ *ap = v; 782 struct componentname *cnp = ap->a_cnp; 783 struct vnode *dvp = ap->a_dvp; 784 struct vnode **vpp = ap->a_vpp; 785 int flags = cnp->cn_flags; 786 struct vnode *newvp; 787 u_int32_t *tl; 788 caddr_t cp; 789 int32_t t1, t2; 790 struct nfsmount *nmp; 791 caddr_t bpos, dpos, cp2; 792 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 793 long len; 794 nfsfh_t *fhp; 795 struct nfsnode *np; 796 int lockparent, wantparent, error = 0, attrflag, fhsize; 797 int v3 = NFS_ISV3(dvp); 798 799 *vpp = NULLVP; 800 if ((flags & ISLASTCN) && (dvp->v_mount->mnt_flag & MNT_RDONLY) && 801 (cnp->cn_nameiop == DELETE || cnp->cn_nameiop == RENAME)) 802 return (EROFS); 803 if (dvp->v_type != VDIR) 804 return (ENOTDIR); 805 lockparent = flags & LOCKPARENT; 806 wantparent = flags & (LOCKPARENT|WANTPARENT); 807 nmp = VFSTONFS(dvp->v_mount); 808 np = VTONFS(dvp); 809 if ((error = cache_lookup(dvp, vpp, cnp)) != 0) { 810 struct vattr vattr; 811 int vpid; 812 813 if (error == ENOENT) { 814 if (!VOP_GETATTR(dvp, &vattr, cnp->cn_cred, 815 cnp->cn_proc) && vattr.va_mtime.tv_sec == 816 VTONFS(dvp)->n_nctime) 817 return (ENOENT); 818 cache_purge(dvp); 819 np->n_nctime = 0; 820 goto dorpc; 821 } 822 823 newvp = *vpp; 824 vpid = newvp->v_id; 825 /* 826 * See the comment starting `Step through' in ufs/ufs_lookup.c 827 * for an explanation of the locking protocol 828 */ 829 if (dvp == newvp) { 830 VREF(newvp); 831 error = 0; 832 } else 833 error = vget(newvp, LK_EXCLUSIVE); 834 if (!error) { 835 if (vpid == newvp->v_id) { 836 if (!VOP_GETATTR(newvp, &vattr, cnp->cn_cred, cnp->cn_proc) 837 && vattr.va_ctime.tv_sec == VTONFS(newvp)->n_ctime) { 838 nfsstats.lookupcache_hits++; 839 if (cnp->cn_nameiop != LOOKUP && 840 (flags & ISLASTCN)) 841 cnp->cn_flags |= SAVENAME; 842 return (0); 843 } 844 cache_purge(newvp); 845 } 846 vrele(newvp); 847 } 848 *vpp = NULLVP; 849 } 850 dorpc: 851 error = 0; 852 newvp = NULLVP; 853 nfsstats.lookupcache_misses++; 854 nfsstats.rpccnt[NFSPROC_LOOKUP]++; 855 len = cnp->cn_namelen; 856 nfsm_reqhead(dvp, NFSPROC_LOOKUP, 857 NFSX_FH(v3) + NFSX_UNSIGNED + nfsm_rndup(len)); 858 nfsm_fhtom(dvp, v3); 859 nfsm_strtom(cnp->cn_nameptr, len, NFS_MAXNAMLEN); 860 nfsm_request(dvp, NFSPROC_LOOKUP, cnp->cn_proc, cnp->cn_cred); 861 if (error) { 862 nfsm_postop_attr(dvp, attrflag); 863 m_freem(mrep); 864 goto nfsmout; 865 } 866 nfsm_getfh(fhp, fhsize, v3); 867 868 /* 869 * Handle RENAME case... 870 */ 871 if (cnp->cn_nameiop == RENAME && wantparent && (flags & ISLASTCN)) { 872 if (NFS_CMPFH(np, fhp, fhsize)) { 873 m_freem(mrep); 874 return (EISDIR); 875 } 876 error = nfs_nget(dvp->v_mount, fhp, fhsize, &np); 877 if (error) { 878 m_freem(mrep); 879 return (error); 880 } 881 newvp = NFSTOV(np); 882 if (v3) { 883 nfsm_postop_attr(newvp, attrflag); 884 nfsm_postop_attr(dvp, attrflag); 885 } else 886 nfsm_loadattr(newvp, (struct vattr *)0); 887 *vpp = newvp; 888 m_freem(mrep); 889 cnp->cn_flags |= SAVENAME; 890 return (0); 891 } 892 893 if (NFS_CMPFH(np, fhp, fhsize)) { 894 VREF(dvp); 895 newvp = dvp; 896 } else { 897 error = nfs_nget(dvp->v_mount, fhp, fhsize, &np); 898 if (error) { 899 m_freem(mrep); 900 return (error); 901 } 902 newvp = NFSTOV(np); 903 } 904 if (v3) { 905 nfsm_postop_attr(newvp, attrflag); 906 nfsm_postop_attr(dvp, attrflag); 907 } else 908 nfsm_loadattr(newvp, (struct vattr *)0); 909 if (cnp->cn_nameiop != LOOKUP && (flags & ISLASTCN)) 910 cnp->cn_flags |= SAVENAME; 911 if ((cnp->cn_flags & MAKEENTRY) && 912 (cnp->cn_nameiop != DELETE || !(flags & ISLASTCN))) { 913 np->n_ctime = np->n_vattr->va_ctime.tv_sec; 914 cache_enter(dvp, newvp, cnp); 915 } 916 *vpp = newvp; 917 nfsm_reqdone; 918 if (error) { 919 if (error == ENOENT && (cnp->cn_flags & MAKEENTRY) && 920 cnp->cn_nameiop != CREATE) { 921 if (VTONFS(dvp)->n_nctime == 0) 922 VTONFS(dvp)->n_nctime = 923 VTONFS(dvp)->n_vattr->va_mtime.tv_sec; 924 cache_enter(dvp, NULL, cnp); 925 } 926 if (newvp != NULLVP) 927 vrele(newvp); 928 if ((cnp->cn_nameiop == CREATE || cnp->cn_nameiop == RENAME) && 929 (flags & ISLASTCN) && error == ENOENT) { 930 if (dvp->v_mount->mnt_flag & MNT_RDONLY) 931 error = EROFS; 932 else 933 error = EJUSTRETURN; 934 } 935 if (cnp->cn_nameiop != LOOKUP && (flags & ISLASTCN)) 936 cnp->cn_flags |= SAVENAME; 937 } 938 return (error); 939 } 940 941 /* 942 * nfs read call. 943 * Just call nfs_bioread() to do the work. 944 */ 945 int 946 nfs_read(v) 947 void *v; 948 { 949 struct vop_read_args /* { 950 struct vnode *a_vp; 951 struct uio *a_uio; 952 int a_ioflag; 953 struct ucred *a_cred; 954 } */ *ap = v; 955 register struct vnode *vp = ap->a_vp; 956 957 if (vp->v_type != VREG) 958 return (EPERM); 959 return (nfs_bioread(vp, ap->a_uio, ap->a_ioflag, ap->a_cred, 0)); 960 } 961 962 /* 963 * nfs readlink call 964 */ 965 int 966 nfs_readlink(v) 967 void *v; 968 { 969 struct vop_readlink_args /* { 970 struct vnode *a_vp; 971 struct uio *a_uio; 972 struct ucred *a_cred; 973 } */ *ap = v; 974 register struct vnode *vp = ap->a_vp; 975 976 if (vp->v_type != VLNK) 977 return (EPERM); 978 return (nfs_bioread(vp, ap->a_uio, 0, ap->a_cred, 0)); 979 } 980 981 /* 982 * Do a readlink rpc. 983 * Called by nfs_doio() from below the buffer cache. 984 */ 985 int 986 nfs_readlinkrpc(vp, uiop, cred) 987 register struct vnode *vp; 988 struct uio *uiop; 989 struct ucred *cred; 990 { 991 register u_int32_t *tl; 992 register caddr_t cp; 993 register int32_t t1, t2; 994 caddr_t bpos, dpos, cp2; 995 int error = 0, len, attrflag; 996 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 997 int v3 = NFS_ISV3(vp); 998 999 nfsstats.rpccnt[NFSPROC_READLINK]++; 1000 nfsm_reqhead(vp, NFSPROC_READLINK, NFSX_FH(v3)); 1001 nfsm_fhtom(vp, v3); 1002 nfsm_request(vp, NFSPROC_READLINK, uiop->uio_procp, cred); 1003 if (v3) 1004 nfsm_postop_attr(vp, attrflag); 1005 if (!error) { 1006 nfsm_strsiz(len, NFS_MAXPATHLEN); 1007 nfsm_mtouio(uiop, len); 1008 } 1009 nfsm_reqdone; 1010 return (error); 1011 } 1012 1013 /* 1014 * nfs read rpc call 1015 * Ditto above 1016 */ 1017 int 1018 nfs_readrpc(vp, uiop, cred) 1019 register struct vnode *vp; 1020 struct uio *uiop; 1021 struct ucred *cred; 1022 { 1023 register u_int32_t *tl; 1024 register caddr_t cp; 1025 register int32_t t1, t2; 1026 caddr_t bpos, dpos, cp2; 1027 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 1028 struct nfsmount *nmp; 1029 int error = 0, len, retlen, tsiz, eof, attrflag; 1030 int v3 = NFS_ISV3(vp); 1031 1032 #ifndef nolint 1033 eof = 0; 1034 #endif 1035 nmp = VFSTONFS(vp->v_mount); 1036 tsiz = uiop->uio_resid; 1037 if (uiop->uio_offset + tsiz > nmp->nm_maxfilesize) 1038 return (EFBIG); 1039 while (tsiz > 0) { 1040 nfsstats.rpccnt[NFSPROC_READ]++; 1041 len = (tsiz > nmp->nm_rsize) ? nmp->nm_rsize : tsiz; 1042 nfsm_reqhead(vp, NFSPROC_READ, NFSX_FH(v3) + NFSX_UNSIGNED * 3); 1043 nfsm_fhtom(vp, v3); 1044 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED * 3); 1045 if (v3) { 1046 txdr_hyper(uiop->uio_offset, tl); 1047 *(tl + 2) = txdr_unsigned(len); 1048 } else { 1049 *tl++ = txdr_unsigned(uiop->uio_offset); 1050 *tl++ = txdr_unsigned(len); 1051 *tl = 0; 1052 } 1053 nfsm_request(vp, NFSPROC_READ, uiop->uio_procp, cred); 1054 if (v3) { 1055 nfsm_postop_attr(vp, attrflag); 1056 if (error) { 1057 m_freem(mrep); 1058 goto nfsmout; 1059 } 1060 nfsm_dissect(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 1061 eof = fxdr_unsigned(int, *(tl + 1)); 1062 } else 1063 nfsm_loadattr(vp, (struct vattr *)0); 1064 nfsm_strsiz(retlen, nmp->nm_rsize); 1065 nfsm_mtouio(uiop, retlen); 1066 m_freem(mrep); 1067 tsiz -= retlen; 1068 if (v3) { 1069 if (eof || retlen == 0) 1070 tsiz = 0; 1071 } else if (retlen < len) 1072 tsiz = 0; 1073 } 1074 nfsmout: 1075 return (error); 1076 } 1077 1078 /* 1079 * nfs write call 1080 */ 1081 int 1082 nfs_writerpc(vp, uiop, cred, iomode, must_commit) 1083 register struct vnode *vp; 1084 register struct uio *uiop; 1085 struct ucred *cred; 1086 int *iomode, *must_commit; 1087 { 1088 register u_int32_t *tl; 1089 register caddr_t cp; 1090 register int32_t t1, t2, backup; 1091 caddr_t bpos, dpos, cp2; 1092 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 1093 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 1094 int error = 0, len, tsiz, wccflag = NFSV3_WCCRATTR, rlen, commit; 1095 int v3 = NFS_ISV3(vp), committed = NFSV3WRITE_FILESYNC; 1096 1097 #ifndef DIAGNOSTIC 1098 if (uiop->uio_iovcnt != 1) 1099 panic("nfs: writerpc iovcnt > 1"); 1100 #endif 1101 *must_commit = 0; 1102 tsiz = uiop->uio_resid; 1103 if (uiop->uio_offset + tsiz > nmp->nm_maxfilesize) 1104 return (EFBIG); 1105 while (tsiz > 0) { 1106 nfsstats.rpccnt[NFSPROC_WRITE]++; 1107 len = (tsiz > nmp->nm_wsize) ? nmp->nm_wsize : tsiz; 1108 nfsm_reqhead(vp, NFSPROC_WRITE, 1109 NFSX_FH(v3) + 5 * NFSX_UNSIGNED + nfsm_rndup(len)); 1110 nfsm_fhtom(vp, v3); 1111 if (v3) { 1112 nfsm_build(tl, u_int32_t *, 5 * NFSX_UNSIGNED); 1113 txdr_hyper(uiop->uio_offset, tl); 1114 tl += 2; 1115 *tl++ = txdr_unsigned(len); 1116 *tl++ = txdr_unsigned(*iomode); 1117 *tl = txdr_unsigned(len); 1118 } else { 1119 register u_int32_t x; 1120 1121 nfsm_build(tl, u_int32_t *, 4 * NFSX_UNSIGNED); 1122 /* Set both "begin" and "current" to non-garbage. */ 1123 x = txdr_unsigned((u_int32_t)uiop->uio_offset); 1124 *tl++ = x; /* "begin offset" */ 1125 *tl++ = x; /* "current offset" */ 1126 x = txdr_unsigned(len); 1127 *tl++ = x; /* total to this offset */ 1128 *tl = x; /* size of this write */ 1129 1130 } 1131 nfsm_uiotom(uiop, len); 1132 nfsm_request(vp, NFSPROC_WRITE, uiop->uio_procp, cred); 1133 if (v3) { 1134 wccflag = NFSV3_WCCCHK; 1135 nfsm_wcc_data(vp, wccflag); 1136 if (!error) { 1137 nfsm_dissect(tl, u_int32_t *, 2 * NFSX_UNSIGNED 1138 + NFSX_V3WRITEVERF); 1139 rlen = fxdr_unsigned(int, *tl++); 1140 if (rlen == 0) { 1141 error = NFSERR_IO; 1142 m_freem(mrep); 1143 break; 1144 } else if (rlen < len) { 1145 backup = len - rlen; 1146 (caddr_t)uiop->uio_iov->iov_base -= 1147 backup; 1148 uiop->uio_iov->iov_len += backup; 1149 uiop->uio_offset -= backup; 1150 uiop->uio_resid += backup; 1151 len = rlen; 1152 } 1153 commit = fxdr_unsigned(int, *tl++); 1154 1155 /* 1156 * Return the lowest committment level 1157 * obtained by any of the RPCs. 1158 */ 1159 if (committed == NFSV3WRITE_FILESYNC) 1160 committed = commit; 1161 else if (committed == NFSV3WRITE_DATASYNC && 1162 commit == NFSV3WRITE_UNSTABLE) 1163 committed = commit; 1164 if ((nmp->nm_iflag & NFSMNT_HASWRITEVERF) == 0){ 1165 memcpy((caddr_t)nmp->nm_verf, (caddr_t)tl, 1166 NFSX_V3WRITEVERF); 1167 nmp->nm_iflag |= NFSMNT_HASWRITEVERF; 1168 } else if (memcmp((caddr_t)tl, 1169 (caddr_t)nmp->nm_verf, NFSX_V3WRITEVERF)) { 1170 *must_commit = 1; 1171 memcpy((caddr_t)nmp->nm_verf, (caddr_t)tl, 1172 NFSX_V3WRITEVERF); 1173 } 1174 } 1175 } else 1176 nfsm_loadattr(vp, (struct vattr *)0); 1177 if (wccflag) 1178 VTONFS(vp)->n_mtime = VTONFS(vp)->n_vattr->va_mtime.tv_sec; 1179 m_freem(mrep); 1180 if (error) 1181 break; 1182 tsiz -= len; 1183 } 1184 nfsmout: 1185 *iomode = committed; 1186 if (error) 1187 uiop->uio_resid = tsiz; 1188 return (error); 1189 } 1190 1191 /* 1192 * nfs mknod rpc 1193 * For NFS v2 this is a kludge. Use a create rpc but with the IFMT bits of the 1194 * mode set to specify the file type and the size field for rdev. 1195 */ 1196 int 1197 nfs_mknodrpc(dvp, vpp, cnp, vap) 1198 register struct vnode *dvp; 1199 register struct vnode **vpp; 1200 register struct componentname *cnp; 1201 register struct vattr *vap; 1202 { 1203 register struct nfsv2_sattr *sp; 1204 register struct nfsv3_sattr *sp3; 1205 register u_int32_t *tl; 1206 register caddr_t cp; 1207 register int32_t t1, t2; 1208 struct vnode *newvp = (struct vnode *)0; 1209 struct nfsnode *np; 1210 char *cp2; 1211 caddr_t bpos, dpos; 1212 int error = 0, wccflag = NFSV3_WCCRATTR, gotvp = 0; 1213 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 1214 u_int32_t rdev; 1215 int v3 = NFS_ISV3(dvp); 1216 1217 if (vap->va_type == VCHR || vap->va_type == VBLK) 1218 rdev = txdr_unsigned(vap->va_rdev); 1219 else if (vap->va_type == VFIFO || vap->va_type == VSOCK) 1220 rdev = nfs_xdrneg1; 1221 else { 1222 VOP_ABORTOP(dvp, cnp); 1223 vput(dvp); 1224 return (EOPNOTSUPP); 1225 } 1226 nfsstats.rpccnt[NFSPROC_MKNOD]++; 1227 nfsm_reqhead(dvp, NFSPROC_MKNOD, NFSX_FH(v3) + 4 * NFSX_UNSIGNED + 1228 + nfsm_rndup(cnp->cn_namelen) + NFSX_SATTR(v3)); 1229 nfsm_fhtom(dvp, v3); 1230 nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN); 1231 if (v3) { 1232 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED + NFSX_V3SRVSATTR); 1233 *tl++ = vtonfsv3_type(vap->va_type); 1234 sp3 = (struct nfsv3_sattr *)tl; 1235 nfsm_v3sattr(sp3, vap); 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 register struct vnode *dvp = ap->a_dvp; 1322 register struct vattr *vap = ap->a_vap; 1323 register struct componentname *cnp = ap->a_cnp; 1324 register struct nfsv2_sattr *sp; 1325 register struct nfsv3_sattr *sp3; 1326 register u_int32_t *tl; 1327 register caddr_t cp; 1328 register int32_t t1, t2; 1329 struct nfsnode *np = (struct nfsnode *)0; 1330 struct vnode *newvp = (struct vnode *)0; 1331 caddr_t bpos, dpos, cp2; 1332 int error = 0, wccflag = NFSV3_WCCRATTR, gotvp = 0, fmode = 0; 1333 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 1334 int v3 = NFS_ISV3(dvp); 1335 1336 /* 1337 * Oops, not for me.. 1338 */ 1339 if (vap->va_type == VSOCK) 1340 return (nfs_mknodrpc(dvp, ap->a_vpp, cnp, vap)); 1341 1342 #ifdef VA_EXCLUSIVE 1343 if (vap->va_vaflags & VA_EXCLUSIVE) 1344 fmode |= O_EXCL; 1345 #endif 1346 again: 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_build(tl, u_int32_t *, NFSX_V3SRVSATTR); 1365 sp3 = (struct nfsv3_sattr *)tl; 1366 nfsm_v3sattr(sp3, vap); 1367 } 1368 } else { 1369 nfsm_build(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 1370 sp->sa_mode = vtonfsv2_mode(vap->va_type, vap->va_mode); 1371 sp->sa_uid = nfs_xdrneg1; 1372 sp->sa_gid = nfs_xdrneg1; 1373 sp->sa_size = 0; 1374 txdr_nfsv2time(&vap->va_atime, &sp->sa_atime); 1375 txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime); 1376 } 1377 nfsm_request(dvp, NFSPROC_CREATE, cnp->cn_proc, cnp->cn_cred); 1378 if (!error) { 1379 nfsm_mtofh(dvp, newvp, v3, gotvp); 1380 if (!gotvp) { 1381 if (newvp) { 1382 vrele(newvp); 1383 newvp = (struct vnode *)0; 1384 } 1385 error = nfs_lookitup(dvp, cnp->cn_nameptr, 1386 cnp->cn_namelen, cnp->cn_cred, cnp->cn_proc, &np); 1387 if (!error) 1388 newvp = NFSTOV(np); 1389 } 1390 } 1391 if (v3) 1392 nfsm_wcc_data(dvp, wccflag); 1393 nfsm_reqdone; 1394 if (error) { 1395 if (v3 && (fmode & O_EXCL) && error == NFSERR_NOTSUPP) { 1396 fmode &= ~O_EXCL; 1397 goto again; 1398 } 1399 if (newvp) 1400 vrele(newvp); 1401 } else if (v3 && (fmode & O_EXCL)) 1402 error = nfs_setattrrpc(newvp, vap, cnp->cn_cred, cnp->cn_proc); 1403 if (!error) { 1404 if (cnp->cn_flags & MAKEENTRY) 1405 cache_enter(dvp, newvp, cnp); 1406 *ap->a_vpp = newvp; 1407 } 1408 FREE(cnp->cn_pnbuf, M_NAMEI); 1409 VTONFS(dvp)->n_flag |= NMODIFIED; 1410 if (!wccflag) 1411 VTONFS(dvp)->n_attrstamp = 0; 1412 vrele(dvp); 1413 return (error); 1414 } 1415 1416 /* 1417 * nfs file remove call 1418 * To try and make nfs semantics closer to ufs semantics, a file that has 1419 * other processes using the vnode is renamed instead of removed and then 1420 * removed later on the last close. 1421 * - If v_usecount > 1 1422 * If a rename is not already in the works 1423 * call nfs_sillyrename() to set it up 1424 * else 1425 * do the remove rpc 1426 */ 1427 int 1428 nfs_remove(v) 1429 void *v; 1430 { 1431 struct vop_remove_args /* { 1432 struct vnodeop_desc *a_desc; 1433 struct vnode * a_dvp; 1434 struct vnode * a_vp; 1435 struct componentname * a_cnp; 1436 } */ *ap = v; 1437 register struct vnode *vp = ap->a_vp; 1438 register struct vnode *dvp = ap->a_dvp; 1439 register struct componentname *cnp = ap->a_cnp; 1440 register struct nfsnode *np = VTONFS(vp); 1441 int error = 0; 1442 struct vattr vattr; 1443 1444 #ifndef DIAGNOSTIC 1445 if ((cnp->cn_flags & HASBUF) == 0) 1446 panic("nfs_remove: no name"); 1447 if (vp->v_usecount < 1) 1448 panic("nfs_remove: bad v_usecount"); 1449 #endif 1450 if (vp->v_type == VDIR) 1451 error = EPERM; 1452 else if (vp->v_usecount == 1 || (np->n_sillyrename && 1453 VOP_GETATTR(vp, &vattr, cnp->cn_cred, cnp->cn_proc) == 0 && 1454 vattr.va_nlink > 1)) { 1455 /* 1456 * Purge the name cache so that the chance of a lookup for 1457 * the name succeeding while the remove is in progress is 1458 * minimized. Without node locking it can still happen, such 1459 * that an I/O op returns ESTALE, but since you get this if 1460 * another host removes the file.. 1461 */ 1462 cache_purge(vp); 1463 /* 1464 * throw away biocache buffers, mainly to avoid 1465 * unnecessary delayed writes later. 1466 */ 1467 error = nfs_vinvalbuf(vp, 0, cnp->cn_cred, cnp->cn_proc, 1); 1468 /* Do the rpc */ 1469 if (error != EINTR) 1470 error = nfs_removerpc(dvp, cnp->cn_nameptr, 1471 cnp->cn_namelen, cnp->cn_cred, cnp->cn_proc); 1472 /* 1473 * Kludge City: If the first reply to the remove rpc is lost.. 1474 * the reply to the retransmitted request will be ENOENT 1475 * since the file was in fact removed 1476 * Therefore, we cheat and return success. 1477 */ 1478 if (error == ENOENT) 1479 error = 0; 1480 } else if (!np->n_sillyrename) 1481 error = nfs_sillyrename(dvp, vp, cnp); 1482 FREE(cnp->cn_pnbuf, M_NAMEI); 1483 np->n_attrstamp = 0; 1484 vrele(dvp); 1485 vrele(vp); 1486 return (error); 1487 } 1488 1489 /* 1490 * nfs file remove rpc called from nfs_inactive 1491 */ 1492 int 1493 nfs_removeit(sp) 1494 register struct sillyrename *sp; 1495 { 1496 1497 return (nfs_removerpc(sp->s_dvp, sp->s_name, sp->s_namlen, sp->s_cred, 1498 (struct proc *)0)); 1499 } 1500 1501 /* 1502 * Nfs remove rpc, called from nfs_remove() and nfs_removeit(). 1503 */ 1504 int 1505 nfs_removerpc(dvp, name, namelen, cred, proc) 1506 register struct vnode *dvp; 1507 const char *name; 1508 int namelen; 1509 struct ucred *cred; 1510 struct proc *proc; 1511 { 1512 register u_int32_t *tl; 1513 register caddr_t cp; 1514 register int32_t t1, t2; 1515 caddr_t bpos, dpos, cp2; 1516 int error = 0, wccflag = NFSV3_WCCRATTR; 1517 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 1518 int v3 = NFS_ISV3(dvp); 1519 1520 nfsstats.rpccnt[NFSPROC_REMOVE]++; 1521 nfsm_reqhead(dvp, NFSPROC_REMOVE, 1522 NFSX_FH(v3) + NFSX_UNSIGNED + nfsm_rndup(namelen)); 1523 nfsm_fhtom(dvp, v3); 1524 nfsm_strtom(name, namelen, NFS_MAXNAMLEN); 1525 nfsm_request(dvp, NFSPROC_REMOVE, proc, cred); 1526 if (v3) 1527 nfsm_wcc_data(dvp, wccflag); 1528 nfsm_reqdone; 1529 VTONFS(dvp)->n_flag |= NMODIFIED; 1530 if (!wccflag) 1531 VTONFS(dvp)->n_attrstamp = 0; 1532 return (error); 1533 } 1534 1535 /* 1536 * nfs file rename call 1537 */ 1538 int 1539 nfs_rename(v) 1540 void *v; 1541 { 1542 struct vop_rename_args /* { 1543 struct vnode *a_fdvp; 1544 struct vnode *a_fvp; 1545 struct componentname *a_fcnp; 1546 struct vnode *a_tdvp; 1547 struct vnode *a_tvp; 1548 struct componentname *a_tcnp; 1549 } */ *ap = v; 1550 register struct vnode *fvp = ap->a_fvp; 1551 register struct vnode *tvp = ap->a_tvp; 1552 register struct vnode *fdvp = ap->a_fdvp; 1553 register struct vnode *tdvp = ap->a_tdvp; 1554 register struct componentname *tcnp = ap->a_tcnp; 1555 register struct componentname *fcnp = ap->a_fcnp; 1556 int error; 1557 1558 #ifndef DIAGNOSTIC 1559 if ((tcnp->cn_flags & HASBUF) == 0 || 1560 (fcnp->cn_flags & HASBUF) == 0) 1561 panic("nfs_rename: no name"); 1562 #endif 1563 /* Check for cross-device rename */ 1564 if ((fvp->v_mount != tdvp->v_mount) || 1565 (tvp && (fvp->v_mount != tvp->v_mount))) { 1566 error = EXDEV; 1567 goto out; 1568 } 1569 1570 /* 1571 * If the tvp exists and is in use, sillyrename it before doing the 1572 * rename of the new file over it. 1573 */ 1574 if (tvp && tvp->v_usecount > 1 && !VTONFS(tvp)->n_sillyrename && 1575 tvp->v_type != VDIR && !nfs_sillyrename(tdvp, tvp, tcnp)) { 1576 vrele(tvp); 1577 tvp = NULL; 1578 } 1579 1580 error = nfs_renamerpc(fdvp, fcnp->cn_nameptr, fcnp->cn_namelen, 1581 tdvp, tcnp->cn_nameptr, tcnp->cn_namelen, tcnp->cn_cred, 1582 tcnp->cn_proc); 1583 1584 if (fvp->v_type == VDIR) { 1585 if (tvp != NULL && tvp->v_type == VDIR) 1586 cache_purge(tdvp); 1587 cache_purge(fdvp); 1588 } 1589 out: 1590 if (tdvp == tvp) 1591 vrele(tdvp); 1592 else 1593 vput(tdvp); 1594 if (tvp) 1595 vput(tvp); 1596 vrele(fdvp); 1597 vrele(fvp); 1598 /* 1599 * Kludge: Map ENOENT => 0 assuming that it is a reply to a retry. 1600 */ 1601 if (error == ENOENT) 1602 error = 0; 1603 return (error); 1604 } 1605 1606 /* 1607 * nfs file rename rpc called from nfs_remove() above 1608 */ 1609 int 1610 nfs_renameit(sdvp, scnp, sp) 1611 struct vnode *sdvp; 1612 struct componentname *scnp; 1613 register struct sillyrename *sp; 1614 { 1615 return (nfs_renamerpc(sdvp, scnp->cn_nameptr, scnp->cn_namelen, 1616 sdvp, sp->s_name, sp->s_namlen, scnp->cn_cred, scnp->cn_proc)); 1617 } 1618 1619 /* 1620 * Do an nfs rename rpc. Called from nfs_rename() and nfs_renameit(). 1621 */ 1622 int 1623 nfs_renamerpc(fdvp, fnameptr, fnamelen, tdvp, tnameptr, tnamelen, cred, proc) 1624 register struct vnode *fdvp; 1625 const char *fnameptr; 1626 int fnamelen; 1627 register struct vnode *tdvp; 1628 const char *tnameptr; 1629 int tnamelen; 1630 struct ucred *cred; 1631 struct proc *proc; 1632 { 1633 register u_int32_t *tl; 1634 register caddr_t cp; 1635 register int32_t t1, t2; 1636 caddr_t bpos, dpos, cp2; 1637 int error = 0, fwccflag = NFSV3_WCCRATTR, twccflag = NFSV3_WCCRATTR; 1638 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 1639 int v3 = NFS_ISV3(fdvp); 1640 1641 nfsstats.rpccnt[NFSPROC_RENAME]++; 1642 nfsm_reqhead(fdvp, NFSPROC_RENAME, 1643 (NFSX_FH(v3) + NFSX_UNSIGNED)*2 + nfsm_rndup(fnamelen) + 1644 nfsm_rndup(tnamelen)); 1645 nfsm_fhtom(fdvp, v3); 1646 nfsm_strtom(fnameptr, fnamelen, NFS_MAXNAMLEN); 1647 nfsm_fhtom(tdvp, v3); 1648 nfsm_strtom(tnameptr, tnamelen, NFS_MAXNAMLEN); 1649 nfsm_request(fdvp, NFSPROC_RENAME, proc, cred); 1650 if (v3) { 1651 nfsm_wcc_data(fdvp, fwccflag); 1652 nfsm_wcc_data(tdvp, twccflag); 1653 } 1654 nfsm_reqdone; 1655 VTONFS(fdvp)->n_flag |= NMODIFIED; 1656 VTONFS(tdvp)->n_flag |= NMODIFIED; 1657 if (!fwccflag) 1658 VTONFS(fdvp)->n_attrstamp = 0; 1659 if (!twccflag) 1660 VTONFS(tdvp)->n_attrstamp = 0; 1661 return (error); 1662 } 1663 1664 /* 1665 * nfs hard link create call 1666 */ 1667 int 1668 nfs_link(v) 1669 void *v; 1670 { 1671 struct vop_link_args /* { 1672 struct vnode *a_dvp; 1673 struct vnode *a_vp; 1674 struct componentname *a_cnp; 1675 } */ *ap = v; 1676 register struct vnode *vp = ap->a_vp; 1677 register struct vnode *dvp = ap->a_dvp; 1678 register struct componentname *cnp = ap->a_cnp; 1679 register u_int32_t *tl; 1680 register caddr_t cp; 1681 register int32_t t1, t2; 1682 caddr_t bpos, dpos, cp2; 1683 int error = 0, wccflag = NFSV3_WCCRATTR, attrflag = 0; 1684 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 1685 int v3; 1686 1687 if (dvp->v_mount != vp->v_mount) { 1688 VOP_ABORTOP(vp, cnp); 1689 vput(dvp); 1690 return (EXDEV); 1691 } 1692 1693 /* 1694 * Push all writes to the server, so that the attribute cache 1695 * doesn't get "out of sync" with the server. 1696 * XXX There should be a better way! 1697 */ 1698 VOP_FSYNC(vp, cnp->cn_cred, FSYNC_WAIT, cnp->cn_proc); 1699 1700 v3 = NFS_ISV3(vp); 1701 nfsstats.rpccnt[NFSPROC_LINK]++; 1702 nfsm_reqhead(vp, NFSPROC_LINK, 1703 NFSX_FH(v3)*2 + NFSX_UNSIGNED + nfsm_rndup(cnp->cn_namelen)); 1704 nfsm_fhtom(vp, v3); 1705 nfsm_fhtom(dvp, v3); 1706 nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN); 1707 nfsm_request(vp, NFSPROC_LINK, cnp->cn_proc, cnp->cn_cred); 1708 if (v3) { 1709 nfsm_postop_attr(vp, attrflag); 1710 nfsm_wcc_data(dvp, wccflag); 1711 } 1712 nfsm_reqdone; 1713 FREE(cnp->cn_pnbuf, M_NAMEI); 1714 VTONFS(dvp)->n_flag |= NMODIFIED; 1715 if (!attrflag) 1716 VTONFS(vp)->n_attrstamp = 0; 1717 if (!wccflag) 1718 VTONFS(dvp)->n_attrstamp = 0; 1719 vput(dvp); 1720 /* 1721 * Kludge: Map EEXIST => 0 assuming that it is a reply to a retry. 1722 */ 1723 if (error == EEXIST) 1724 error = 0; 1725 return (error); 1726 } 1727 1728 /* 1729 * nfs symbolic link create call 1730 */ 1731 int 1732 nfs_symlink(v) 1733 void *v; 1734 { 1735 struct vop_symlink_args /* { 1736 struct vnode *a_dvp; 1737 struct vnode **a_vpp; 1738 struct componentname *a_cnp; 1739 struct vattr *a_vap; 1740 char *a_target; 1741 } */ *ap = v; 1742 register struct vnode *dvp = ap->a_dvp; 1743 register struct vattr *vap = ap->a_vap; 1744 register struct componentname *cnp = ap->a_cnp; 1745 register struct nfsv2_sattr *sp; 1746 register struct nfsv3_sattr *sp3; 1747 register u_int32_t *tl; 1748 register caddr_t cp; 1749 register int32_t t1, t2; 1750 caddr_t bpos, dpos, cp2; 1751 int slen, error = 0, wccflag = NFSV3_WCCRATTR, gotvp; 1752 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 1753 struct vnode *newvp = (struct vnode *)0; 1754 int v3 = NFS_ISV3(dvp); 1755 1756 nfsstats.rpccnt[NFSPROC_SYMLINK]++; 1757 slen = strlen(ap->a_target); 1758 nfsm_reqhead(dvp, NFSPROC_SYMLINK, NFSX_FH(v3) + 2*NFSX_UNSIGNED + 1759 nfsm_rndup(cnp->cn_namelen) + nfsm_rndup(slen) + NFSX_SATTR(v3)); 1760 nfsm_fhtom(dvp, v3); 1761 nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN); 1762 if (v3) { 1763 nfsm_build(sp3, struct nfsv3_sattr *, NFSX_V3SRVSATTR); 1764 nfsm_v3sattr(sp3, vap); 1765 } 1766 nfsm_strtom(ap->a_target, slen, NFS_MAXPATHLEN); 1767 if (!v3) { 1768 nfsm_build(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 1769 sp->sa_mode = vtonfsv2_mode(VLNK, vap->va_mode); 1770 sp->sa_uid = nfs_xdrneg1; 1771 sp->sa_gid = nfs_xdrneg1; 1772 sp->sa_size = nfs_xdrneg1; 1773 txdr_nfsv2time(&vap->va_atime, &sp->sa_atime); 1774 txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime); 1775 } 1776 nfsm_request(dvp, NFSPROC_SYMLINK, cnp->cn_proc, cnp->cn_cred); 1777 if (v3) { 1778 if (!error) 1779 nfsm_mtofh(dvp, newvp, v3, gotvp); 1780 nfsm_wcc_data(dvp, wccflag); 1781 } 1782 nfsm_reqdone; 1783 if (newvp) 1784 vrele(newvp); 1785 FREE(cnp->cn_pnbuf, M_NAMEI); 1786 VTONFS(dvp)->n_flag |= NMODIFIED; 1787 if (!wccflag) 1788 VTONFS(dvp)->n_attrstamp = 0; 1789 vrele(dvp); 1790 /* 1791 * Kludge: Map EEXIST => 0 assuming that it is a reply to a retry. 1792 */ 1793 if (error == EEXIST) 1794 error = 0; 1795 return (error); 1796 } 1797 1798 /* 1799 * nfs make dir call 1800 */ 1801 int 1802 nfs_mkdir(v) 1803 void *v; 1804 { 1805 struct vop_mkdir_args /* { 1806 struct vnode *a_dvp; 1807 struct vnode **a_vpp; 1808 struct componentname *a_cnp; 1809 struct vattr *a_vap; 1810 } */ *ap = v; 1811 register struct vnode *dvp = ap->a_dvp; 1812 register struct vattr *vap = ap->a_vap; 1813 register struct componentname *cnp = ap->a_cnp; 1814 register struct nfsv2_sattr *sp; 1815 register struct nfsv3_sattr *sp3; 1816 register u_int32_t *tl; 1817 register caddr_t cp; 1818 register int32_t t1, t2; 1819 register int len; 1820 struct nfsnode *np = (struct nfsnode *)0; 1821 struct vnode *newvp = (struct vnode *)0; 1822 caddr_t bpos, dpos, cp2; 1823 int error = 0, wccflag = NFSV3_WCCRATTR; 1824 int gotvp = 0; 1825 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 1826 int v3 = NFS_ISV3(dvp); 1827 1828 len = cnp->cn_namelen; 1829 nfsstats.rpccnt[NFSPROC_MKDIR]++; 1830 nfsm_reqhead(dvp, NFSPROC_MKDIR, 1831 NFSX_FH(v3) + NFSX_UNSIGNED + nfsm_rndup(len) + NFSX_SATTR(v3)); 1832 nfsm_fhtom(dvp, v3); 1833 nfsm_strtom(cnp->cn_nameptr, len, NFS_MAXNAMLEN); 1834 if (v3) { 1835 nfsm_build(sp3, struct nfsv3_sattr *, NFSX_V3SRVSATTR); 1836 nfsm_v3sattr(sp3, vap); 1837 } else { 1838 nfsm_build(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 1839 sp->sa_mode = vtonfsv2_mode(VDIR, vap->va_mode); 1840 sp->sa_uid = nfs_xdrneg1; 1841 sp->sa_gid = nfs_xdrneg1; 1842 sp->sa_size = nfs_xdrneg1; 1843 txdr_nfsv2time(&vap->va_atime, &sp->sa_atime); 1844 txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime); 1845 } 1846 nfsm_request(dvp, NFSPROC_MKDIR, cnp->cn_proc, cnp->cn_cred); 1847 if (!error) 1848 nfsm_mtofh(dvp, newvp, v3, gotvp); 1849 if (v3) 1850 nfsm_wcc_data(dvp, wccflag); 1851 nfsm_reqdone; 1852 VTONFS(dvp)->n_flag |= NMODIFIED; 1853 if (!wccflag) 1854 VTONFS(dvp)->n_attrstamp = 0; 1855 /* 1856 * Kludge: Map EEXIST => 0 assuming that you have a reply to a retry 1857 * if we can succeed in looking up the directory. 1858 */ 1859 if (error == EEXIST || (!error && !gotvp)) { 1860 if (newvp) { 1861 vrele(newvp); 1862 newvp = (struct vnode *)0; 1863 } 1864 error = nfs_lookitup(dvp, cnp->cn_nameptr, len, cnp->cn_cred, 1865 cnp->cn_proc, &np); 1866 if (!error) { 1867 newvp = NFSTOV(np); 1868 if (newvp->v_type != VDIR) 1869 error = EEXIST; 1870 } 1871 } 1872 if (error) { 1873 if (newvp) 1874 vrele(newvp); 1875 } else { 1876 if (cnp->cn_flags & MAKEENTRY) 1877 cache_enter(dvp, newvp, cnp); 1878 *ap->a_vpp = newvp; 1879 } 1880 FREE(cnp->cn_pnbuf, M_NAMEI); 1881 vrele(dvp); 1882 return (error); 1883 } 1884 1885 /* 1886 * nfs remove directory call 1887 */ 1888 int 1889 nfs_rmdir(v) 1890 void *v; 1891 { 1892 struct vop_rmdir_args /* { 1893 struct vnode *a_dvp; 1894 struct vnode *a_vp; 1895 struct componentname *a_cnp; 1896 } */ *ap = v; 1897 register struct vnode *vp = ap->a_vp; 1898 register struct vnode *dvp = ap->a_dvp; 1899 register struct componentname *cnp = ap->a_cnp; 1900 register u_int32_t *tl; 1901 register caddr_t cp; 1902 register int32_t t1, t2; 1903 caddr_t bpos, dpos, cp2; 1904 int error = 0, wccflag = NFSV3_WCCRATTR; 1905 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 1906 int v3 = NFS_ISV3(dvp); 1907 1908 if (dvp == vp) { 1909 vrele(dvp); 1910 vrele(dvp); 1911 FREE(cnp->cn_pnbuf, M_NAMEI); 1912 return (EINVAL); 1913 } 1914 nfsstats.rpccnt[NFSPROC_RMDIR]++; 1915 nfsm_reqhead(dvp, NFSPROC_RMDIR, 1916 NFSX_FH(v3) + NFSX_UNSIGNED + nfsm_rndup(cnp->cn_namelen)); 1917 nfsm_fhtom(dvp, v3); 1918 nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN); 1919 nfsm_request(dvp, NFSPROC_RMDIR, cnp->cn_proc, cnp->cn_cred); 1920 if (v3) 1921 nfsm_wcc_data(dvp, wccflag); 1922 nfsm_reqdone; 1923 FREE(cnp->cn_pnbuf, M_NAMEI); 1924 VTONFS(dvp)->n_flag |= NMODIFIED; 1925 if (!wccflag) 1926 VTONFS(dvp)->n_attrstamp = 0; 1927 cache_purge(dvp); 1928 cache_purge(vp); 1929 vrele(vp); 1930 vrele(dvp); 1931 /* 1932 * Kludge: Map ENOENT => 0 assuming that you have a reply to a retry. 1933 */ 1934 if (error == ENOENT) 1935 error = 0; 1936 return (error); 1937 } 1938 1939 /* 1940 * nfs readdir call 1941 */ 1942 int 1943 nfs_readdir(v) 1944 void *v; 1945 { 1946 struct vop_readdir_args /* { 1947 struct vnode *a_vp; 1948 struct uio *a_uio; 1949 struct ucred *a_cred; 1950 int *a_eofflag; 1951 off_t **a_cookies; 1952 int *a_ncookies; 1953 } */ *ap = v; 1954 register struct vnode *vp = ap->a_vp; 1955 register struct uio *uio = ap->a_uio; 1956 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 1957 char *base = uio->uio_iov->iov_base; 1958 int tresid, error; 1959 size_t count, lost; 1960 struct dirent *dp; 1961 off_t *cookies = NULL; 1962 int ncookies = 0, nc; 1963 1964 if (vp->v_type != VDIR) 1965 return (EPERM); 1966 1967 lost = uio->uio_resid & (NFS_DIRFRAGSIZ - 1); 1968 count = uio->uio_resid - lost; 1969 if (count <= 0) 1970 return (EINVAL); 1971 1972 /* 1973 * Call nfs_bioread() to do the real work. 1974 */ 1975 tresid = uio->uio_resid = count; 1976 error = nfs_bioread(vp, uio, 0, ap->a_cred, 1977 ap->a_cookies ? NFSBIO_CACHECOOKIES : 0); 1978 1979 if (!error && ap->a_cookies) { 1980 ncookies = count / 16; 1981 MALLOC(cookies, off_t *, sizeof (off_t) * ncookies, M_TEMP, 1982 M_WAITOK); 1983 *ap->a_cookies = cookies; 1984 } 1985 1986 if (!error && uio->uio_resid == tresid) { 1987 uio->uio_resid += lost; 1988 nfsstats.direofcache_misses++; 1989 if (ap->a_cookies) 1990 *ap->a_ncookies = 0; 1991 *ap->a_eofflag = 1; 1992 return (0); 1993 } 1994 1995 if (!error && ap->a_cookies) { 1996 /* 1997 * Only the NFS server and emulations use cookies, and they 1998 * load the directory block into system space, so we can 1999 * just look at it directly. 2000 */ 2001 if (uio->uio_segflg != UIO_SYSSPACE || uio->uio_iovcnt != 1) 2002 panic("nfs_readdir: lost in space"); 2003 for (nc = 0; ncookies-- && 2004 base < (char *)uio->uio_iov->iov_base; nc++){ 2005 dp = (struct dirent *) base; 2006 if (dp->d_reclen == 0) 2007 break; 2008 if (nmp->nm_flag & NFSMNT_XLATECOOKIE) 2009 *(cookies++) = (off_t)NFS_GETCOOKIE32(dp); 2010 else 2011 *(cookies++) = NFS_GETCOOKIE(dp); 2012 base += dp->d_reclen; 2013 } 2014 uio->uio_resid += 2015 ((caddr_t)uio->uio_iov->iov_base - base); 2016 uio->uio_iov->iov_len += 2017 ((caddr_t)uio->uio_iov->iov_base - base); 2018 uio->uio_iov->iov_base = base; 2019 *ap->a_ncookies = nc; 2020 } 2021 2022 uio->uio_resid += lost; 2023 *ap->a_eofflag = 0; 2024 return (error); 2025 } 2026 2027 /* 2028 * Readdir rpc call. 2029 * Called from below the buffer cache by nfs_doio(). 2030 */ 2031 int 2032 nfs_readdirrpc(vp, uiop, cred) 2033 struct vnode *vp; 2034 register struct uio *uiop; 2035 struct ucred *cred; 2036 { 2037 register int len, left; 2038 register struct dirent *dp = NULL; 2039 register u_int32_t *tl; 2040 register caddr_t cp; 2041 register int32_t t1, t2; 2042 caddr_t bpos, dpos, cp2; 2043 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 2044 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 2045 struct nfsnode *dnp = VTONFS(vp); 2046 u_quad_t fileno; 2047 int error = 0, tlen, more_dirs = 1, blksiz = 0, bigenough = 1; 2048 int attrflag, nrpcs = 0, reclen; 2049 int v3 = NFS_ISV3(vp); 2050 nfsquad_t cookie; 2051 2052 #ifdef DIAGNOSTIC 2053 /* 2054 * Should be called from buffer cache, so only amount of 2055 * NFS_DIRBLKSIZ will be requested. 2056 */ 2057 if (uiop->uio_iovcnt != 1 || (uiop->uio_resid & (NFS_DIRBLKSIZ - 1))) 2058 panic("nfs readdirrpc bad uio"); 2059 #endif 2060 2061 /* 2062 * Loop around doing readdir rpc's of size nm_readdirsize 2063 * truncated to a multiple of NFS_DIRFRAGSIZ. 2064 * The stopping criteria is EOF or buffer full. 2065 */ 2066 while (more_dirs && bigenough) { 2067 /* 2068 * Heuristic: don't bother to do another RPC to further 2069 * fill up this block if there is not much room left. (< 50% 2070 * of the readdir RPC size). This wastes some buffer space 2071 * but can save up to 50% in RPC calls. 2072 */ 2073 if (nrpcs > 0 && uiop->uio_resid < (nmp->nm_readdirsize / 2)) { 2074 bigenough = 0; 2075 break; 2076 } 2077 nfsstats.rpccnt[NFSPROC_READDIR]++; 2078 nfsm_reqhead(vp, NFSPROC_READDIR, NFSX_FH(v3) + 2079 NFSX_READDIR(v3)); 2080 nfsm_fhtom(vp, v3); 2081 if (v3) { 2082 nfsm_build(tl, u_int32_t *, 5 * NFSX_UNSIGNED); 2083 cookie.qval = uiop->uio_offset; 2084 if (nmp->nm_iflag & NFSMNT_SWAPCOOKIE) { 2085 txdr_swapcookie3(uiop->uio_offset, tl); 2086 } else { 2087 txdr_cookie3(uiop->uio_offset, tl); 2088 } 2089 tl += 2; 2090 *tl++ = dnp->n_cookieverf.nfsuquad[0]; 2091 *tl++ = dnp->n_cookieverf.nfsuquad[1]; 2092 } else { 2093 nfsm_build(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 2094 *tl++ = txdr_unsigned(uiop->uio_offset); 2095 } 2096 *tl = txdr_unsigned(nmp->nm_readdirsize); 2097 nfsm_request(vp, NFSPROC_READDIR, uiop->uio_procp, cred); 2098 nrpcs++; 2099 if (v3) { 2100 nfsm_postop_attr(vp, attrflag); 2101 if (!error) { 2102 nfsm_dissect(tl, u_int32_t *, 2103 2 * NFSX_UNSIGNED); 2104 dnp->n_cookieverf.nfsuquad[0] = *tl++; 2105 dnp->n_cookieverf.nfsuquad[1] = *tl; 2106 } else { 2107 m_freem(mrep); 2108 goto nfsmout; 2109 } 2110 } 2111 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 2112 more_dirs = fxdr_unsigned(int, *tl); 2113 2114 /* loop thru the dir entries, doctoring them to 4bsd form */ 2115 while (more_dirs && bigenough) { 2116 if (v3) { 2117 nfsm_dissect(tl, u_int32_t *, 2118 3 * NFSX_UNSIGNED); 2119 fileno = fxdr_hyper(tl); 2120 len = fxdr_unsigned(int, *(tl + 2)); 2121 } else { 2122 nfsm_dissect(tl, u_int32_t *, 2123 2 * NFSX_UNSIGNED); 2124 fileno = fxdr_unsigned(u_quad_t, *tl++); 2125 len = fxdr_unsigned(int, *tl); 2126 } 2127 if (len <= 0 || len > NFS_MAXNAMLEN) { 2128 error = EBADRPC; 2129 m_freem(mrep); 2130 goto nfsmout; 2131 } 2132 tlen = nfsm_rndup(len); 2133 if (tlen == len) 2134 tlen += 4; /* To ensure null termination */ 2135 tlen += sizeof (off_t) + sizeof (int); 2136 reclen = ALIGN(tlen + DIRHDSIZ); 2137 tlen = reclen - DIRHDSIZ; 2138 left = NFS_DIRFRAGSIZ - blksiz; 2139 if (reclen > left) { 2140 dp->d_reclen += left; 2141 (caddr_t)uiop->uio_iov->iov_base += left; 2142 uiop->uio_iov->iov_len -= left; 2143 uiop->uio_resid -= left; 2144 blksiz = 0; 2145 NFS_STASHCOOKIE(dp, uiop->uio_offset); 2146 } 2147 if (reclen > uiop->uio_resid) 2148 bigenough = 0; 2149 if (bigenough) { 2150 dp = (struct dirent *)uiop->uio_iov->iov_base; 2151 dp->d_fileno = (int)fileno; 2152 dp->d_namlen = len; 2153 dp->d_reclen = reclen; 2154 dp->d_type = DT_UNKNOWN; 2155 blksiz += dp->d_reclen; 2156 if (blksiz == NFS_DIRFRAGSIZ) 2157 blksiz = 0; 2158 uiop->uio_resid -= DIRHDSIZ; 2159 (caddr_t)uiop->uio_iov->iov_base += DIRHDSIZ; 2160 uiop->uio_iov->iov_len -= DIRHDSIZ; 2161 nfsm_mtouio(uiop, len); 2162 cp = uiop->uio_iov->iov_base; 2163 tlen -= len; 2164 *cp = '\0'; /* null terminate */ 2165 (caddr_t)uiop->uio_iov->iov_base += tlen; 2166 uiop->uio_iov->iov_len -= tlen; 2167 uiop->uio_resid -= tlen; 2168 } else 2169 nfsm_adv(nfsm_rndup(len)); 2170 if (v3) { 2171 nfsm_dissect(tl, u_int32_t *, 2172 3 * NFSX_UNSIGNED); 2173 } else { 2174 nfsm_dissect(tl, u_int32_t *, 2175 2 * NFSX_UNSIGNED); 2176 } 2177 if (bigenough) { 2178 if (v3) { 2179 if (nmp->nm_iflag & NFSMNT_SWAPCOOKIE) 2180 uiop->uio_offset = 2181 fxdr_swapcookie3(tl); 2182 else 2183 uiop->uio_offset = 2184 fxdr_cookie3(tl); 2185 } 2186 else { 2187 uiop->uio_offset = 2188 fxdr_unsigned(off_t, *tl); 2189 } 2190 NFS_STASHCOOKIE(dp, uiop->uio_offset); 2191 } 2192 if (v3) 2193 tl += 2; 2194 else 2195 tl++; 2196 more_dirs = fxdr_unsigned(int, *tl); 2197 } 2198 /* 2199 * If at end of rpc data, get the eof boolean 2200 */ 2201 if (!more_dirs) { 2202 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 2203 more_dirs = (fxdr_unsigned(int, *tl) == 0); 2204 } 2205 m_freem(mrep); 2206 } 2207 /* 2208 * Fill last record, iff any, out to a multiple of NFS_DIRFRAGSIZ 2209 * by increasing d_reclen for the last record. 2210 */ 2211 if (blksiz > 0) { 2212 left = NFS_DIRFRAGSIZ - blksiz; 2213 dp->d_reclen += left; 2214 NFS_STASHCOOKIE(dp, uiop->uio_offset); 2215 (caddr_t)uiop->uio_iov->iov_base += left; 2216 uiop->uio_iov->iov_len -= left; 2217 uiop->uio_resid -= left; 2218 } 2219 2220 /* 2221 * We are now either at the end of the directory or have filled the 2222 * block. 2223 */ 2224 if (bigenough) 2225 dnp->n_direofoffset = uiop->uio_offset; 2226 nfsmout: 2227 return (error); 2228 } 2229 2230 /* 2231 * NFS V3 readdir plus RPC. Used in place of nfs_readdirrpc(). 2232 */ 2233 int 2234 nfs_readdirplusrpc(vp, uiop, cred) 2235 struct vnode *vp; 2236 register struct uio *uiop; 2237 struct ucred *cred; 2238 { 2239 register int len, left; 2240 register struct dirent *dp = NULL; 2241 register u_int32_t *tl; 2242 register caddr_t cp; 2243 register int32_t t1, t2; 2244 struct vnode *newvp; 2245 caddr_t bpos, dpos, cp2; 2246 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 2247 struct nameidata nami, *ndp = &nami; 2248 struct componentname *cnp = &ndp->ni_cnd; 2249 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 2250 struct nfsnode *dnp = VTONFS(vp), *np; 2251 const unsigned char *hcp; 2252 nfsfh_t *fhp; 2253 u_quad_t fileno; 2254 int error = 0, tlen, more_dirs = 1, blksiz = 0, doit, bigenough = 1, i; 2255 int attrflag, fhsize, nrpcs = 0, reclen; 2256 struct nfs_fattr fattr, *fp; 2257 2258 #ifdef DIAGNOSTIC 2259 if (uiop->uio_iovcnt != 1 || (uiop->uio_resid & (NFS_DIRBLKSIZ - 1))) 2260 panic("nfs readdirplusrpc bad uio"); 2261 #endif 2262 ndp->ni_dvp = vp; 2263 newvp = NULLVP; 2264 2265 /* 2266 * Loop around doing readdir rpc's of size nm_readdirsize 2267 * truncated to a multiple of NFS_DIRFRAGSIZ. 2268 * The stopping criteria is EOF or buffer full. 2269 */ 2270 while (more_dirs && bigenough) { 2271 if (nrpcs > 0 && uiop->uio_resid < (nmp->nm_readdirsize / 2)) { 2272 bigenough = 0; 2273 break; 2274 } 2275 nfsstats.rpccnt[NFSPROC_READDIRPLUS]++; 2276 nfsm_reqhead(vp, NFSPROC_READDIRPLUS, 2277 NFSX_FH(1) + 6 * NFSX_UNSIGNED); 2278 nfsm_fhtom(vp, 1); 2279 nfsm_build(tl, u_int32_t *, 6 * NFSX_UNSIGNED); 2280 if (nmp->nm_iflag & NFSMNT_SWAPCOOKIE) { 2281 txdr_swapcookie3(uiop->uio_offset, tl); 2282 } else { 2283 txdr_cookie3(uiop->uio_offset, tl); 2284 } 2285 tl += 2; 2286 *tl++ = dnp->n_cookieverf.nfsuquad[0]; 2287 *tl++ = dnp->n_cookieverf.nfsuquad[1]; 2288 *tl++ = txdr_unsigned(nmp->nm_readdirsize); 2289 *tl = txdr_unsigned(nmp->nm_rsize); 2290 nfsm_request(vp, NFSPROC_READDIRPLUS, uiop->uio_procp, cred); 2291 nfsm_postop_attr(vp, attrflag); 2292 if (error) { 2293 m_freem(mrep); 2294 goto nfsmout; 2295 } 2296 nrpcs++; 2297 nfsm_dissect(tl, u_int32_t *, 3 * NFSX_UNSIGNED); 2298 dnp->n_cookieverf.nfsuquad[0] = *tl++; 2299 dnp->n_cookieverf.nfsuquad[1] = *tl++; 2300 more_dirs = fxdr_unsigned(int, *tl); 2301 2302 /* loop thru the dir entries, doctoring them to 4bsd form */ 2303 while (more_dirs && bigenough) { 2304 nfsm_dissect(tl, u_int32_t *, 3 * NFSX_UNSIGNED); 2305 fileno = fxdr_hyper(tl); 2306 len = fxdr_unsigned(int, *(tl + 2)); 2307 if (len <= 0 || len > NFS_MAXNAMLEN) { 2308 error = EBADRPC; 2309 m_freem(mrep); 2310 goto nfsmout; 2311 } 2312 tlen = nfsm_rndup(len); 2313 if (tlen == len) 2314 tlen += 4; /* To ensure null termination*/ 2315 tlen += sizeof (off_t) + sizeof (int); 2316 reclen = ALIGN(tlen + DIRHDSIZ); 2317 tlen = reclen - DIRHDSIZ; 2318 left = NFS_DIRFRAGSIZ - blksiz; 2319 if (reclen > left) { 2320 /* 2321 * DIRFRAGSIZ is aligned, no need to align 2322 * again here. 2323 */ 2324 dp->d_reclen += left; 2325 (caddr_t)uiop->uio_iov->iov_base += left; 2326 uiop->uio_iov->iov_len -= left; 2327 uiop->uio_resid -= left; 2328 NFS_STASHCOOKIE(dp, uiop->uio_offset); 2329 blksiz = 0; 2330 } 2331 if (reclen > uiop->uio_resid) 2332 bigenough = 0; 2333 if (bigenough) { 2334 dp = (struct dirent *)uiop->uio_iov->iov_base; 2335 dp->d_fileno = (int)fileno; 2336 dp->d_namlen = len; 2337 dp->d_reclen = reclen; 2338 dp->d_type = DT_UNKNOWN; 2339 blksiz += dp->d_reclen; 2340 if (blksiz == NFS_DIRFRAGSIZ) 2341 blksiz = 0; 2342 uiop->uio_resid -= DIRHDSIZ; 2343 (caddr_t)uiop->uio_iov->iov_base += DIRHDSIZ; 2344 uiop->uio_iov->iov_len -= DIRHDSIZ; 2345 cnp->cn_nameptr = uiop->uio_iov->iov_base; 2346 cnp->cn_namelen = len; 2347 nfsm_mtouio(uiop, len); 2348 cp = uiop->uio_iov->iov_base; 2349 tlen -= len; 2350 *cp = '\0'; 2351 (caddr_t)uiop->uio_iov->iov_base += tlen; 2352 uiop->uio_iov->iov_len -= tlen; 2353 uiop->uio_resid -= tlen; 2354 } else 2355 nfsm_adv(nfsm_rndup(len)); 2356 nfsm_dissect(tl, u_int32_t *, 3 * NFSX_UNSIGNED); 2357 if (bigenough) { 2358 if (nmp->nm_iflag & NFSMNT_SWAPCOOKIE) 2359 uiop->uio_offset = 2360 fxdr_swapcookie3(tl); 2361 else 2362 uiop->uio_offset = 2363 fxdr_cookie3(tl); 2364 NFS_STASHCOOKIE(dp, uiop->uio_offset); 2365 } 2366 tl += 2; 2367 2368 /* 2369 * Since the attributes are before the file handle 2370 * (sigh), we must skip over the attributes and then 2371 * come back and get them. 2372 */ 2373 attrflag = fxdr_unsigned(int, *tl); 2374 if (attrflag) { 2375 nfsm_dissect(fp, struct nfs_fattr *, NFSX_V3FATTR); 2376 memcpy(&fattr, fp, NFSX_V3FATTR); 2377 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 2378 doit = fxdr_unsigned(int, *tl); 2379 if (doit) { 2380 nfsm_getfh(fhp, fhsize, 1); 2381 if (NFS_CMPFH(dnp, fhp, fhsize)) { 2382 VREF(vp); 2383 newvp = vp; 2384 np = dnp; 2385 } else { 2386 error = nfs_nget(vp->v_mount, fhp, 2387 fhsize, &np); 2388 if (!error) 2389 newvp = NFSTOV(np); 2390 } 2391 if (!error) { 2392 nfs_loadattrcache(&newvp, &fattr, 0); 2393 dp->d_type = 2394 IFTODT(VTTOIF(np->n_vattr->va_type)); 2395 ndp->ni_vp = newvp; 2396 cnp->cn_hash = 0; 2397 for (hcp = cnp->cn_nameptr, i = 1; i <= len; 2398 i++, hcp++) 2399 cnp->cn_hash += *hcp * i; 2400 if (cnp->cn_namelen <= NCHNAMLEN) 2401 cache_enter(ndp->ni_dvp, ndp->ni_vp, 2402 cnp); 2403 } 2404 } 2405 } else { 2406 /* Just skip over the file handle */ 2407 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 2408 i = fxdr_unsigned(int, *tl); 2409 nfsm_adv(nfsm_rndup(i)); 2410 } 2411 if (newvp != NULLVP) { 2412 vrele(newvp); 2413 newvp = NULLVP; 2414 } 2415 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 2416 more_dirs = fxdr_unsigned(int, *tl); 2417 } 2418 /* 2419 * If at end of rpc data, get the eof boolean 2420 */ 2421 if (!more_dirs) { 2422 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 2423 more_dirs = (fxdr_unsigned(int, *tl) == 0); 2424 } 2425 m_freem(mrep); 2426 } 2427 /* 2428 * Fill last record, iff any, out to a multiple of NFS_DIRFRAGSIZ 2429 * by increasing d_reclen for the last record. 2430 */ 2431 if (blksiz > 0) { 2432 left = NFS_DIRFRAGSIZ - blksiz; 2433 dp->d_reclen += left; 2434 NFS_STASHCOOKIE(dp, uiop->uio_offset); 2435 (caddr_t)uiop->uio_iov->iov_base += left; 2436 uiop->uio_iov->iov_len -= left; 2437 uiop->uio_resid -= left; 2438 } 2439 2440 /* 2441 * We are now either at the end of the directory or have filled the 2442 * block. 2443 */ 2444 if (bigenough) 2445 dnp->n_direofoffset = uiop->uio_offset; 2446 nfsmout: 2447 if (newvp != NULLVP) 2448 vrele(newvp); 2449 return (error); 2450 } 2451 static char hextoasc[] = "0123456789abcdef"; 2452 2453 /* 2454 * Silly rename. To make the NFS filesystem that is stateless look a little 2455 * more like the "ufs" a remove of an active vnode is translated to a rename 2456 * to a funny looking filename that is removed by nfs_inactive on the 2457 * nfsnode. There is the potential for another process on a different client 2458 * to create the same funny name between the nfs_lookitup() fails and the 2459 * nfs_rename() completes, but... 2460 */ 2461 int 2462 nfs_sillyrename(dvp, vp, cnp) 2463 struct vnode *dvp, *vp; 2464 struct componentname *cnp; 2465 { 2466 register struct sillyrename *sp; 2467 struct nfsnode *np; 2468 int error; 2469 short pid; 2470 2471 cache_purge(dvp); 2472 np = VTONFS(vp); 2473 #ifndef DIAGNOSTIC 2474 if (vp->v_type == VDIR) 2475 panic("nfs: sillyrename dir"); 2476 #endif 2477 MALLOC(sp, struct sillyrename *, sizeof (struct sillyrename), 2478 M_NFSREQ, M_WAITOK); 2479 sp->s_cred = crdup(cnp->cn_cred); 2480 sp->s_dvp = dvp; 2481 VREF(dvp); 2482 2483 /* Fudge together a funny name */ 2484 pid = cnp->cn_proc->p_pid; 2485 memcpy(sp->s_name, ".nfsAxxxx4.4", 13); 2486 sp->s_namlen = 12; 2487 sp->s_name[8] = hextoasc[pid & 0xf]; 2488 sp->s_name[7] = hextoasc[(pid >> 4) & 0xf]; 2489 sp->s_name[6] = hextoasc[(pid >> 8) & 0xf]; 2490 sp->s_name[5] = hextoasc[(pid >> 12) & 0xf]; 2491 2492 /* Try lookitups until we get one that isn't there */ 2493 while (nfs_lookitup(dvp, sp->s_name, sp->s_namlen, sp->s_cred, 2494 cnp->cn_proc, (struct nfsnode **)0) == 0) { 2495 sp->s_name[4]++; 2496 if (sp->s_name[4] > 'z') { 2497 error = EINVAL; 2498 goto bad; 2499 } 2500 } 2501 error = nfs_renameit(dvp, cnp, sp); 2502 if (error) 2503 goto bad; 2504 error = nfs_lookitup(dvp, sp->s_name, sp->s_namlen, sp->s_cred, 2505 cnp->cn_proc, &np); 2506 np->n_sillyrename = sp; 2507 return (0); 2508 bad: 2509 vrele(sp->s_dvp); 2510 crfree(sp->s_cred); 2511 free((caddr_t)sp, M_NFSREQ); 2512 return (error); 2513 } 2514 2515 /* 2516 * Look up a file name and optionally either update the file handle or 2517 * allocate an nfsnode, depending on the value of npp. 2518 * npp == NULL --> just do the lookup 2519 * *npp == NULL --> allocate a new nfsnode and make sure attributes are 2520 * handled too 2521 * *npp != NULL --> update the file handle in the vnode 2522 */ 2523 int 2524 nfs_lookitup(dvp, name, len, cred, procp, npp) 2525 register struct vnode *dvp; 2526 const char *name; 2527 int len; 2528 struct ucred *cred; 2529 struct proc *procp; 2530 struct nfsnode **npp; 2531 { 2532 register u_int32_t *tl; 2533 register caddr_t cp; 2534 register int32_t t1, t2; 2535 struct vnode *newvp = (struct vnode *)0; 2536 struct nfsnode *np, *dnp = VTONFS(dvp); 2537 caddr_t bpos, dpos, cp2; 2538 int error = 0, fhlen, attrflag; 2539 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 2540 nfsfh_t *nfhp; 2541 int v3 = NFS_ISV3(dvp); 2542 2543 nfsstats.rpccnt[NFSPROC_LOOKUP]++; 2544 nfsm_reqhead(dvp, NFSPROC_LOOKUP, 2545 NFSX_FH(v3) + NFSX_UNSIGNED + nfsm_rndup(len)); 2546 nfsm_fhtom(dvp, v3); 2547 nfsm_strtom(name, len, NFS_MAXNAMLEN); 2548 nfsm_request(dvp, NFSPROC_LOOKUP, procp, cred); 2549 if (npp && !error) { 2550 nfsm_getfh(nfhp, fhlen, v3); 2551 if (*npp) { 2552 np = *npp; 2553 if (np->n_fhsize > NFS_SMALLFH && fhlen <= NFS_SMALLFH) { 2554 free((caddr_t)np->n_fhp, M_NFSBIGFH); 2555 np->n_fhp = &np->n_fh; 2556 } else if (np->n_fhsize <= NFS_SMALLFH && fhlen>NFS_SMALLFH) 2557 np->n_fhp =(nfsfh_t *)malloc(fhlen,M_NFSBIGFH,M_WAITOK); 2558 memcpy((caddr_t)np->n_fhp, (caddr_t)nfhp, fhlen); 2559 np->n_fhsize = fhlen; 2560 newvp = NFSTOV(np); 2561 } else if (NFS_CMPFH(dnp, nfhp, fhlen)) { 2562 VREF(dvp); 2563 newvp = dvp; 2564 } else { 2565 error = nfs_nget(dvp->v_mount, nfhp, fhlen, &np); 2566 if (error) { 2567 m_freem(mrep); 2568 return (error); 2569 } 2570 newvp = NFSTOV(np); 2571 } 2572 if (v3) { 2573 nfsm_postop_attr(newvp, attrflag); 2574 if (!attrflag && *npp == NULL) { 2575 m_freem(mrep); 2576 vrele(newvp); 2577 return (ENOENT); 2578 } 2579 } else 2580 nfsm_loadattr(newvp, (struct vattr *)0); 2581 } 2582 nfsm_reqdone; 2583 if (npp && *npp == NULL) { 2584 if (error) { 2585 if (newvp) 2586 vrele(newvp); 2587 } else 2588 *npp = np; 2589 } 2590 return (error); 2591 } 2592 2593 /* 2594 * Nfs Version 3 commit rpc 2595 */ 2596 int 2597 nfs_commit(vp, offset, cnt, cred, procp) 2598 register struct vnode *vp; 2599 u_quad_t offset; 2600 int cnt; 2601 struct ucred *cred; 2602 struct proc *procp; 2603 { 2604 register caddr_t cp; 2605 register u_int32_t *tl; 2606 register int32_t t1, t2; 2607 register struct nfsmount *nmp = VFSTONFS(vp->v_mount); 2608 caddr_t bpos, dpos, cp2; 2609 int error = 0, wccflag = NFSV3_WCCRATTR; 2610 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 2611 2612 if ((nmp->nm_iflag & NFSMNT_HASWRITEVERF) == 0) 2613 return (0); 2614 nfsstats.rpccnt[NFSPROC_COMMIT]++; 2615 nfsm_reqhead(vp, NFSPROC_COMMIT, NFSX_FH(1)); 2616 nfsm_fhtom(vp, 1); 2617 nfsm_build(tl, u_int32_t *, 3 * NFSX_UNSIGNED); 2618 txdr_hyper(offset, tl); 2619 tl += 2; 2620 *tl = txdr_unsigned(cnt); 2621 nfsm_request(vp, NFSPROC_COMMIT, procp, cred); 2622 nfsm_wcc_data(vp, wccflag); 2623 if (!error) { 2624 nfsm_dissect(tl, u_int32_t *, NFSX_V3WRITEVERF); 2625 if (memcmp((caddr_t)nmp->nm_verf, (caddr_t)tl, 2626 NFSX_V3WRITEVERF)) { 2627 memcpy((caddr_t)nmp->nm_verf, (caddr_t)tl, 2628 NFSX_V3WRITEVERF); 2629 error = NFSERR_STALEWRITEVERF; 2630 } 2631 } 2632 nfsm_reqdone; 2633 return (error); 2634 } 2635 2636 /* 2637 * Kludge City.. 2638 * - make nfs_bmap() essentially a no-op that does no translation 2639 * - do nfs_strategy() by doing I/O with nfs_readrpc/nfs_writerpc 2640 * (Maybe I could use the process's page mapping, but I was concerned that 2641 * Kernel Write might not be enabled and also figured copyout() would do 2642 * a lot more work than memcpy() and also it currently happens in the 2643 * context of the swapper process (2). 2644 */ 2645 int 2646 nfs_bmap(v) 2647 void *v; 2648 { 2649 struct vop_bmap_args /* { 2650 struct vnode *a_vp; 2651 daddr_t a_bn; 2652 struct vnode **a_vpp; 2653 daddr_t *a_bnp; 2654 int *a_runp; 2655 } */ *ap = v; 2656 register struct vnode *vp = ap->a_vp; 2657 2658 if (ap->a_vpp != NULL) 2659 *ap->a_vpp = vp; 2660 if (ap->a_bnp != NULL) 2661 *ap->a_bnp = ap->a_bn * btodb(vp->v_mount->mnt_stat.f_iosize); 2662 return (0); 2663 } 2664 2665 /* 2666 * Strategy routine. 2667 * For async requests when nfsiod(s) are running, queue the request by 2668 * calling nfs_asyncio(), otherwise just all nfs_doio() to do the 2669 * request. 2670 */ 2671 int 2672 nfs_strategy(v) 2673 void *v; 2674 { 2675 struct vop_strategy_args *ap = v; 2676 register struct buf *bp = ap->a_bp; 2677 struct ucred *cr; 2678 struct proc *p; 2679 int error = 0; 2680 2681 if ((bp->b_flags & (B_PHYS|B_ASYNC)) == (B_PHYS|B_ASYNC)) 2682 panic("nfs physio/async"); 2683 if (bp->b_flags & B_ASYNC) 2684 p = (struct proc *)0; 2685 else 2686 p = curproc; /* XXX */ 2687 if (bp->b_flags & B_READ) 2688 cr = bp->b_rcred; 2689 else 2690 cr = bp->b_wcred; 2691 /* 2692 * If the op is asynchronous and an i/o daemon is waiting 2693 * queue the request, wake it up and wait for completion 2694 * otherwise just do it ourselves. 2695 */ 2696 if ((bp->b_flags & B_ASYNC) == 0 || 2697 nfs_asyncio(bp, NOCRED)) 2698 error = nfs_doio(bp, cr, p); 2699 return (error); 2700 } 2701 2702 /* 2703 * Mmap a file 2704 * 2705 * NB Currently unsupported. 2706 */ 2707 /* ARGSUSED */ 2708 int 2709 nfs_mmap(v) 2710 void *v; 2711 { 2712 #if 0 2713 struct vop_mmap_args /* { 2714 struct vnode *a_vp; 2715 int a_fflags; 2716 struct ucred *a_cred; 2717 struct proc *a_p; 2718 } */ *ap = v; 2719 #endif 2720 2721 return (EINVAL); 2722 } 2723 2724 /* 2725 * fsync vnode op. Just call nfs_flush() with commit == 1. 2726 */ 2727 /* ARGSUSED */ 2728 int 2729 nfs_fsync(v) 2730 void *v; 2731 { 2732 struct vop_fsync_args /* { 2733 struct vnodeop_desc *a_desc; 2734 struct vnode * a_vp; 2735 struct ucred * a_cred; 2736 int a_flags; 2737 struct proc * a_p; 2738 } */ *ap = v; 2739 2740 return (nfs_flush(ap->a_vp, ap->a_cred, 2741 (ap->a_flags & FSYNC_WAIT) != 0 ? MNT_WAIT : 0, ap->a_p, 1)); 2742 } 2743 2744 /* 2745 * Flush all the blocks associated with a vnode. 2746 * Walk through the buffer pool and push any dirty pages 2747 * associated with the vnode. 2748 */ 2749 int 2750 nfs_flush(vp, cred, waitfor, p, commit) 2751 register struct vnode *vp; 2752 struct ucred *cred; 2753 int waitfor; 2754 struct proc *p; 2755 int commit; 2756 { 2757 register struct nfsnode *np = VTONFS(vp); 2758 register struct buf *bp; 2759 register int i; 2760 struct buf *nbp; 2761 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 2762 int s, error = 0, slptimeo = 0, slpflag = 0, retv, bvecpos; 2763 int passone = 1; 2764 u_quad_t off = (u_quad_t)-1, endoff = 0, toff; 2765 struct ucred* wcred = NULL; 2766 #ifndef NFS_COMMITBVECSIZ 2767 #define NFS_COMMITBVECSIZ 20 2768 #endif 2769 struct buf *bvec[NFS_COMMITBVECSIZ]; 2770 2771 if (nmp->nm_flag & NFSMNT_INT) 2772 slpflag = PCATCH; 2773 if (!commit) 2774 passone = 0; 2775 /* 2776 * A b_flags == (B_DELWRI | B_NEEDCOMMIT) block has been written to the 2777 * server, but nas not been committed to stable storage on the server 2778 * yet. On the first pass, the byte range is worked out and the commit 2779 * rpc is done. On the second pass, nfs_writebp() is called to do the 2780 * job. 2781 */ 2782 again: 2783 bvecpos = 0; 2784 if (NFS_ISV3(vp) && commit) { 2785 s = splbio(); 2786 for (bp = vp->v_dirtyblkhd.lh_first; bp; bp = nbp) { 2787 nbp = bp->b_vnbufs.le_next; 2788 if (bvecpos >= NFS_COMMITBVECSIZ) 2789 break; 2790 if ((bp->b_flags & (B_BUSY | B_DELWRI | B_NEEDCOMMIT)) 2791 != (B_DELWRI | B_NEEDCOMMIT)) 2792 continue; 2793 bremfree(bp); 2794 /* 2795 * Work out if all buffers are using the same cred 2796 * so we can deal with them all with one commit. 2797 */ 2798 if (wcred == NULL) 2799 wcred = bp->b_wcred; 2800 else if (wcred != bp->b_wcred) 2801 wcred = NOCRED; 2802 bp->b_flags |= (B_BUSY | B_WRITEINPROG); 2803 /* 2804 * A list of these buffers is kept so that the 2805 * second loop knows which buffers have actually 2806 * been committed. This is necessary, since there 2807 * may be a race between the commit rpc and new 2808 * uncommitted writes on the file. 2809 */ 2810 bvec[bvecpos++] = bp; 2811 toff = ((u_quad_t)bp->b_blkno) * DEV_BSIZE + 2812 bp->b_dirtyoff; 2813 if (toff < off) 2814 off = toff; 2815 toff += (u_quad_t)(bp->b_dirtyend - bp->b_dirtyoff); 2816 if (toff > endoff) 2817 endoff = toff; 2818 } 2819 splx(s); 2820 } 2821 if (bvecpos > 0) { 2822 /* 2823 * Commit data on the server, as required. 2824 * If all bufs are using the same wcred, then use that with 2825 * one call for all of them, otherwise commit each one 2826 * separately. 2827 */ 2828 if (wcred != NOCRED) 2829 retv = nfs_commit(vp, off, (int)(endoff - off), 2830 wcred, p); 2831 else { 2832 retv = 0; 2833 for (i = 0; i < bvecpos; i++) { 2834 off_t off, size; 2835 bp = bvec[i]; 2836 off = ((u_quad_t)bp->b_blkno) * DEV_BSIZE + 2837 bp->b_dirtyoff; 2838 size = (u_quad_t)(bp->b_dirtyend 2839 - bp->b_dirtyoff); 2840 retv = nfs_commit(vp, off, (int)size, 2841 bp->b_wcred, p); 2842 if (retv) break; 2843 } 2844 } 2845 2846 if (retv == NFSERR_STALEWRITEVERF) 2847 nfs_clearcommit(vp->v_mount); 2848 /* 2849 * Now, either mark the blocks I/O done or mark the 2850 * blocks dirty, depending on whether the commit 2851 * succeeded. 2852 */ 2853 for (i = 0; i < bvecpos; i++) { 2854 bp = bvec[i]; 2855 bp->b_flags &= ~(B_NEEDCOMMIT | B_WRITEINPROG); 2856 if (retv) 2857 brelse(bp); 2858 else { 2859 vp->v_numoutput++; 2860 bp->b_flags |= B_ASYNC; 2861 bp->b_flags &= ~(B_READ|B_DONE|B_ERROR|B_DELWRI); 2862 bp->b_dirtyoff = bp->b_dirtyend = 0; 2863 reassignbuf(bp, vp); 2864 biodone(bp); 2865 } 2866 } 2867 } 2868 2869 /* 2870 * Start/do any write(s) that are required. 2871 */ 2872 loop: 2873 s = splbio(); 2874 for (bp = vp->v_dirtyblkhd.lh_first; bp; bp = nbp) { 2875 nbp = bp->b_vnbufs.le_next; 2876 if (bp->b_flags & B_BUSY) { 2877 if (waitfor != MNT_WAIT || passone) 2878 continue; 2879 bp->b_flags |= B_WANTED; 2880 error = tsleep((caddr_t)bp, slpflag | (PRIBIO + 1), 2881 "nfsfsync", slptimeo); 2882 splx(s); 2883 if (error) { 2884 if (nfs_sigintr(nmp, (struct nfsreq *)0, p)) 2885 return (EINTR); 2886 if (slpflag == PCATCH) { 2887 slpflag = 0; 2888 slptimeo = 2 * hz; 2889 } 2890 } 2891 goto loop; 2892 } 2893 if ((bp->b_flags & B_DELWRI) == 0) 2894 panic("nfs_fsync: not dirty"); 2895 if ((passone || !commit) && (bp->b_flags & B_NEEDCOMMIT)) 2896 continue; 2897 bremfree(bp); 2898 if (passone || !commit) 2899 bp->b_flags |= (B_BUSY|B_ASYNC); 2900 else 2901 bp->b_flags |= (B_BUSY|B_ASYNC|B_WRITEINPROG|B_NEEDCOMMIT); 2902 splx(s); 2903 VOP_BWRITE(bp); 2904 goto loop; 2905 } 2906 splx(s); 2907 if (passone) { 2908 passone = 0; 2909 goto again; 2910 } 2911 if (waitfor == MNT_WAIT) { 2912 while (vp->v_numoutput) { 2913 vp->v_flag |= VBWAIT; 2914 error = tsleep((caddr_t)&vp->v_numoutput, 2915 slpflag | (PRIBIO + 1), "nfsfsync", slptimeo); 2916 if (error) { 2917 if (nfs_sigintr(nmp, (struct nfsreq *)0, p)) 2918 return (EINTR); 2919 if (slpflag == PCATCH) { 2920 slpflag = 0; 2921 slptimeo = 2 * hz; 2922 } 2923 } 2924 } 2925 if (vp->v_dirtyblkhd.lh_first && commit) { 2926 #if 0 2927 vprint("nfs_fsync: dirty", vp); 2928 #endif 2929 goto loop; 2930 } 2931 } 2932 if (np->n_flag & NWRITEERR) { 2933 error = np->n_error; 2934 np->n_flag &= ~NWRITEERR; 2935 } 2936 return (error); 2937 } 2938 2939 /* 2940 * Return POSIX pathconf information applicable to nfs. 2941 * 2942 * N.B. The NFS V2 protocol doesn't support this RPC. 2943 */ 2944 /* ARGSUSED */ 2945 int 2946 nfs_pathconf(v) 2947 void *v; 2948 { 2949 struct vop_pathconf_args /* { 2950 struct vnode *a_vp; 2951 int a_name; 2952 register_t *a_retval; 2953 } */ *ap = v; 2954 struct nfsv3_pathconf *pcp; 2955 struct vnode *vp = ap->a_vp; 2956 struct nfsmount *nmp; 2957 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 2958 int32_t t1, t2; 2959 u_int32_t *tl; 2960 caddr_t bpos, dpos, cp, cp2; 2961 int error = 0, attrflag; 2962 unsigned int l; 2963 u_int64_t maxsize; 2964 int v3 = NFS_ISV3(vp); 2965 2966 switch (ap->a_name) { 2967 /* Names that can be resolved locally. */ 2968 case _PC_PIPE_BUF: 2969 *ap->a_retval = PIPE_BUF; 2970 break; 2971 case _PC_SYNC_IO: 2972 *ap->a_retval = 1; 2973 break; 2974 /* Names that cannot be resolved locally; do an RPC, if possible. */ 2975 case _PC_LINK_MAX: 2976 case _PC_NAME_MAX: 2977 case _PC_CHOWN_RESTRICTED: 2978 case _PC_NO_TRUNC: 2979 if (!v3) { 2980 error = EINVAL; 2981 break; 2982 } 2983 nfsstats.rpccnt[NFSPROC_PATHCONF]++; 2984 nfsm_reqhead(vp, NFSPROC_PATHCONF, NFSX_FH(1)); 2985 nfsm_fhtom(vp, 1); 2986 nfsm_request(vp, NFSPROC_PATHCONF, 2987 curproc, curproc->p_ucred); /* XXX */ 2988 nfsm_postop_attr(vp, attrflag); 2989 if (!error) { 2990 nfsm_dissect(pcp, struct nfsv3_pathconf *, 2991 NFSX_V3PATHCONF); 2992 switch (ap->a_name) { 2993 case _PC_LINK_MAX: 2994 *ap->a_retval = 2995 fxdr_unsigned(register_t, pcp->pc_linkmax); 2996 break; 2997 case _PC_NAME_MAX: 2998 *ap->a_retval = 2999 fxdr_unsigned(register_t, pcp->pc_namemax); 3000 break; 3001 case _PC_CHOWN_RESTRICTED: 3002 *ap->a_retval = 3003 (pcp->pc_chownrestricted == nfs_true); 3004 break; 3005 case _PC_NO_TRUNC: 3006 *ap->a_retval = 3007 (pcp->pc_notrunc == nfs_true); 3008 break; 3009 } 3010 } 3011 nfsm_reqdone; 3012 break; 3013 case _PC_FILESIZEBITS: 3014 if (v3) { 3015 nmp = VFSTONFS(vp->v_mount); 3016 if ((nmp->nm_iflag & NFSMNT_GOTFSINFO) == 0) 3017 if ((error = nfs_fsinfo(nmp, vp, 3018 curproc->p_ucred, curproc)) != 0) /* XXX */ 3019 break; 3020 for (l = 0, maxsize = nmp->nm_maxfilesize; 3021 (maxsize >> l) > 0; l++) 3022 ; 3023 *ap->a_retval = l + 1; 3024 } else { 3025 *ap->a_retval = 32; /* NFS V2 limitation */ 3026 } 3027 break; 3028 default: 3029 error = EINVAL; 3030 break; 3031 } 3032 3033 return (error); 3034 } 3035 3036 /* 3037 * NFS advisory byte-level locks. 3038 */ 3039 int 3040 nfs_advlock(v) 3041 void *v; 3042 { 3043 struct vop_advlock_args /* { 3044 struct vnode *a_vp; 3045 caddr_t a_id; 3046 int a_op; 3047 struct flock *a_fl; 3048 int a_flags; 3049 } */ *ap = v; 3050 register struct nfsnode *np = VTONFS(ap->a_vp); 3051 3052 return (lf_advlock(&np->n_lockf, np->n_size, ap->a_id, ap->a_op, 3053 ap->a_fl, ap->a_flags)); 3054 } 3055 3056 /* 3057 * Print out the contents of an nfsnode. 3058 */ 3059 int 3060 nfs_print(v) 3061 void *v; 3062 { 3063 struct vop_print_args /* { 3064 struct vnode *a_vp; 3065 } */ *ap = v; 3066 register struct vnode *vp = ap->a_vp; 3067 register struct nfsnode *np = VTONFS(vp); 3068 3069 printf("tag VT_NFS, fileid %ld fsid 0x%lx", 3070 np->n_vattr->va_fileid, np->n_vattr->va_fsid); 3071 if (vp->v_type == VFIFO) 3072 fifo_printinfo(vp); 3073 printf("\n"); 3074 return (0); 3075 } 3076 3077 /* 3078 * NFS file truncation. 3079 */ 3080 int 3081 nfs_truncate(v) 3082 void *v; 3083 { 3084 #if 0 3085 struct vop_truncate_args /* { 3086 struct vnode *a_vp; 3087 off_t a_length; 3088 int a_flags; 3089 struct ucred *a_cred; 3090 struct proc *a_p; 3091 } */ *ap = v; 3092 #endif 3093 3094 /* Use nfs_setattr */ 3095 return (EOPNOTSUPP); 3096 } 3097 3098 /* 3099 * NFS update. 3100 */ 3101 int 3102 nfs_update(v) 3103 void *v; 3104 #if 0 3105 struct vop_update_args /* { 3106 struct vnode *a_vp; 3107 struct timespec *a_ta; 3108 struct timespec *a_tm; 3109 int a_waitfor; 3110 } */ *ap = v; 3111 #endif 3112 { 3113 3114 /* Use nfs_setattr */ 3115 return (EOPNOTSUPP); 3116 } 3117 3118 /* 3119 * Just call nfs_writebp() with the force argument set to 1. 3120 */ 3121 int 3122 nfs_bwrite(v) 3123 void *v; 3124 { 3125 struct vop_bwrite_args /* { 3126 struct vnode *a_bp; 3127 } */ *ap = v; 3128 3129 return (nfs_writebp(ap->a_bp, 1)); 3130 } 3131 3132 /* 3133 * This is a clone of vn_bwrite(), except that B_WRITEINPROG isn't set unless 3134 * the force flag is one and it also handles the B_NEEDCOMMIT flag. 3135 */ 3136 int 3137 nfs_writebp(bp, force) 3138 register struct buf *bp; 3139 int force; 3140 { 3141 register int oldflags = bp->b_flags, retv = 1; 3142 register struct proc *p = curproc; /* XXX */ 3143 off_t off; 3144 3145 if(!(bp->b_flags & B_BUSY)) 3146 panic("bwrite: buffer is not busy???"); 3147 3148 #ifdef fvdl_debug 3149 printf("nfs_writebp(%x): vp %x voff %d vend %d doff %d dend %d\n", 3150 bp, bp->b_vp, bp->b_validoff, bp->b_validend, bp->b_dirtyoff, 3151 bp->b_dirtyend); 3152 #endif 3153 bp->b_flags &= ~(B_READ|B_DONE|B_ERROR|B_DELWRI|B_AGE); 3154 3155 if (oldflags & B_ASYNC) { 3156 if (oldflags & B_DELWRI) { 3157 reassignbuf(bp, bp->b_vp); 3158 } else if (p) { 3159 ++p->p_stats->p_ru.ru_oublock; 3160 } 3161 } 3162 bp->b_vp->v_numoutput++; 3163 3164 /* 3165 * If B_NEEDCOMMIT is set, a commit rpc may do the trick. If not 3166 * an actual write will have to be scheduled via. VOP_STRATEGY(). 3167 * If B_WRITEINPROG is already set, then push it with a write anyhow. 3168 */ 3169 if ((oldflags & (B_NEEDCOMMIT | B_WRITEINPROG)) == B_NEEDCOMMIT) { 3170 off = ((u_quad_t)bp->b_blkno) * DEV_BSIZE + bp->b_dirtyoff; 3171 bp->b_flags |= B_WRITEINPROG; 3172 retv = nfs_commit(bp->b_vp, off, bp->b_dirtyend-bp->b_dirtyoff, 3173 bp->b_wcred, bp->b_proc); 3174 bp->b_flags &= ~B_WRITEINPROG; 3175 if (!retv) { 3176 bp->b_dirtyoff = bp->b_dirtyend = 0; 3177 bp->b_flags &= ~B_NEEDCOMMIT; 3178 biodone(bp); 3179 } else if (retv == NFSERR_STALEWRITEVERF) 3180 nfs_clearcommit(bp->b_vp->v_mount); 3181 } 3182 if (retv) { 3183 if (force) 3184 bp->b_flags |= B_WRITEINPROG; 3185 VOP_STRATEGY(bp); 3186 } 3187 3188 if( (oldflags & B_ASYNC) == 0) { 3189 int rtval = biowait(bp); 3190 if (oldflags & B_DELWRI) { 3191 reassignbuf(bp, bp->b_vp); 3192 } else if (p) { 3193 ++p->p_stats->p_ru.ru_oublock; 3194 } 3195 brelse(bp); 3196 return (rtval); 3197 } 3198 3199 return (0); 3200 } 3201 3202 /* 3203 * nfs special file access vnode op. 3204 * Essentially just get vattr and then imitate iaccess() since the device is 3205 * local to the client. 3206 */ 3207 int 3208 nfsspec_access(v) 3209 void *v; 3210 { 3211 struct vop_access_args /* { 3212 struct vnode *a_vp; 3213 int a_mode; 3214 struct ucred *a_cred; 3215 struct proc *a_p; 3216 } */ *ap = v; 3217 struct vattr va; 3218 struct vnode *vp = ap->a_vp; 3219 int error; 3220 3221 error = VOP_GETATTR(vp, &va, ap->a_cred, ap->a_p); 3222 if (error) 3223 return (error); 3224 3225 /* 3226 * Disallow write attempts on filesystems mounted read-only; 3227 * unless the file is a socket, fifo, or a block or character 3228 * device resident on the filesystem. 3229 */ 3230 if ((ap->a_mode & VWRITE) && (vp->v_mount->mnt_flag & MNT_RDONLY)) { 3231 switch (vp->v_type) { 3232 case VREG: 3233 case VDIR: 3234 case VLNK: 3235 return (EROFS); 3236 default: 3237 break; 3238 } 3239 } 3240 3241 return (vaccess(va.va_type, va.va_mode, 3242 va.va_uid, va.va_gid, ap->a_mode, ap->a_cred)); 3243 } 3244 3245 /* 3246 * Read wrapper for special devices. 3247 */ 3248 int 3249 nfsspec_read(v) 3250 void *v; 3251 { 3252 struct vop_read_args /* { 3253 struct vnode *a_vp; 3254 struct uio *a_uio; 3255 int a_ioflag; 3256 struct ucred *a_cred; 3257 } */ *ap = v; 3258 register struct nfsnode *np = VTONFS(ap->a_vp); 3259 3260 /* 3261 * Set access flag. 3262 */ 3263 np->n_flag |= NACC; 3264 np->n_atim.tv_sec = time.tv_sec; 3265 np->n_atim.tv_nsec = time.tv_usec * 1000; 3266 return (VOCALL(spec_vnodeop_p, VOFFSET(vop_read), ap)); 3267 } 3268 3269 /* 3270 * Write wrapper for special devices. 3271 */ 3272 int 3273 nfsspec_write(v) 3274 void *v; 3275 { 3276 struct vop_write_args /* { 3277 struct vnode *a_vp; 3278 struct uio *a_uio; 3279 int a_ioflag; 3280 struct ucred *a_cred; 3281 } */ *ap = v; 3282 register struct nfsnode *np = VTONFS(ap->a_vp); 3283 3284 /* 3285 * Set update flag. 3286 */ 3287 np->n_flag |= NUPD; 3288 np->n_mtim.tv_sec = time.tv_sec; 3289 np->n_mtim.tv_nsec = time.tv_usec * 1000; 3290 return (VOCALL(spec_vnodeop_p, VOFFSET(vop_write), ap)); 3291 } 3292 3293 /* 3294 * Close wrapper for special devices. 3295 * 3296 * Update the times on the nfsnode then do device close. 3297 */ 3298 int 3299 nfsspec_close(v) 3300 void *v; 3301 { 3302 struct vop_close_args /* { 3303 struct vnode *a_vp; 3304 int a_fflag; 3305 struct ucred *a_cred; 3306 struct proc *a_p; 3307 } */ *ap = v; 3308 register struct vnode *vp = ap->a_vp; 3309 register struct nfsnode *np = VTONFS(vp); 3310 struct vattr vattr; 3311 3312 if (np->n_flag & (NACC | NUPD)) { 3313 np->n_flag |= NCHG; 3314 if (vp->v_usecount == 1 && 3315 (vp->v_mount->mnt_flag & MNT_RDONLY) == 0) { 3316 VATTR_NULL(&vattr); 3317 if (np->n_flag & NACC) 3318 vattr.va_atime = np->n_atim; 3319 if (np->n_flag & NUPD) 3320 vattr.va_mtime = np->n_mtim; 3321 (void)VOP_SETATTR(vp, &vattr, ap->a_cred, ap->a_p); 3322 } 3323 } 3324 return (VOCALL(spec_vnodeop_p, VOFFSET(vop_close), ap)); 3325 } 3326 3327 /* 3328 * Read wrapper for fifos. 3329 */ 3330 int 3331 nfsfifo_read(v) 3332 void *v; 3333 { 3334 struct vop_read_args /* { 3335 struct vnode *a_vp; 3336 struct uio *a_uio; 3337 int a_ioflag; 3338 struct ucred *a_cred; 3339 } */ *ap = v; 3340 extern int (**fifo_vnodeop_p) __P((void *)); 3341 register struct nfsnode *np = VTONFS(ap->a_vp); 3342 3343 /* 3344 * Set access flag. 3345 */ 3346 np->n_flag |= NACC; 3347 np->n_atim.tv_sec = time.tv_sec; 3348 np->n_atim.tv_nsec = time.tv_usec * 1000; 3349 return (VOCALL(fifo_vnodeop_p, VOFFSET(vop_read), ap)); 3350 } 3351 3352 /* 3353 * Write wrapper for fifos. 3354 */ 3355 int 3356 nfsfifo_write(v) 3357 void *v; 3358 { 3359 struct vop_write_args /* { 3360 struct vnode *a_vp; 3361 struct uio *a_uio; 3362 int a_ioflag; 3363 struct ucred *a_cred; 3364 } */ *ap = v; 3365 extern int (**fifo_vnodeop_p) __P((void *)); 3366 register struct nfsnode *np = VTONFS(ap->a_vp); 3367 3368 /* 3369 * Set update flag. 3370 */ 3371 np->n_flag |= NUPD; 3372 np->n_mtim.tv_sec = time.tv_sec; 3373 np->n_mtim.tv_nsec = time.tv_usec * 1000; 3374 return (VOCALL(fifo_vnodeop_p, VOFFSET(vop_write), ap)); 3375 } 3376 3377 /* 3378 * Close wrapper for fifos. 3379 * 3380 * Update the times on the nfsnode then do fifo close. 3381 */ 3382 int 3383 nfsfifo_close(v) 3384 void *v; 3385 { 3386 struct vop_close_args /* { 3387 struct vnode *a_vp; 3388 int a_fflag; 3389 struct ucred *a_cred; 3390 struct proc *a_p; 3391 } */ *ap = v; 3392 register struct vnode *vp = ap->a_vp; 3393 register struct nfsnode *np = VTONFS(vp); 3394 struct vattr vattr; 3395 extern int (**fifo_vnodeop_p) __P((void *)); 3396 3397 if (np->n_flag & (NACC | NUPD)) { 3398 if (np->n_flag & NACC) { 3399 np->n_atim.tv_sec = time.tv_sec; 3400 np->n_atim.tv_nsec = time.tv_usec * 1000; 3401 } 3402 if (np->n_flag & NUPD) { 3403 np->n_mtim.tv_sec = time.tv_sec; 3404 np->n_mtim.tv_nsec = time.tv_usec * 1000; 3405 } 3406 np->n_flag |= NCHG; 3407 if (vp->v_usecount == 1 && 3408 (vp->v_mount->mnt_flag & MNT_RDONLY) == 0) { 3409 VATTR_NULL(&vattr); 3410 if (np->n_flag & NACC) 3411 vattr.va_atime = np->n_atim; 3412 if (np->n_flag & NUPD) 3413 vattr.va_mtime = np->n_mtim; 3414 (void)VOP_SETATTR(vp, &vattr, ap->a_cred, ap->a_p); 3415 } 3416 } 3417 return (VOCALL(fifo_vnodeop_p, VOFFSET(vop_close), ap)); 3418 } 3419
Indexes created Thu Oct 16 14:10:15 GMT 2025