nfs_vnops.c revision 47028
1/* 2 * Copyright (c) 1989, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * This code is derived from software contributed to Berkeley by 6 * Rick Macklem at The University of Guelph. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. All advertising materials mentioning features or use of this software 17 * must display the following acknowledgement: 18 * This product includes software developed by the University of 19 * California, Berkeley and its contributors. 20 * 4. Neither the name of the University nor the names of its contributors 21 * may be used to endorse or promote products derived from this software 22 * without specific prior written permission. 23 * 24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 34 * SUCH DAMAGE. 35 * 36 * @(#)nfs_vnops.c 8.16 (Berkeley) 5/27/95 37 * $Id: nfs_vnops.c,v 1.128 1999/05/06 20:00:30 phk Exp $ 38 */ 39 40 41/* 42 * vnode op calls for Sun NFS version 2 and 3 43 */ 44 45#include "opt_inet.h" 46 47#include <sys/param.h> 48#include <sys/kernel.h> 49#include <sys/systm.h> 50#include <sys/resourcevar.h> 51#include <sys/proc.h> 52#include <sys/mount.h> 53#include <sys/buf.h> 54#include <sys/malloc.h> 55#include <sys/mbuf.h> 56#include <sys/namei.h> 57#include <sys/socket.h> 58#include <sys/vnode.h> 59#include <sys/dirent.h> 60#include <sys/fcntl.h> 61#include <sys/lockf.h> 62#include <sys/stat.h> 63#include <sys/sysctl.h> 64 65#include <vm/vm.h> 66#include <vm/vm_extern.h> 67#include <vm/vm_zone.h> 68 69#include <miscfs/fifofs/fifo.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 81#include <net/if.h> 82#include <netinet/in.h> 83#include <netinet/in_var.h> 84 85/* Defs */ 86#define TRUE 1 87#define FALSE 0 88 89/* 90 * Ifdef for FreeBSD-current merged buffer cache. It is unfortunate that these 91 * calls are not in getblk() and brelse() so that they would not be necessary 92 * here. 93 */ 94#ifndef B_VMIO 95#define vfs_busy_pages(bp, f) 96#endif 97 98static int nfsspec_read __P((struct vop_read_args *)); 99static int nfsspec_write __P((struct vop_write_args *)); 100static int nfsfifo_read __P((struct vop_read_args *)); 101static int nfsfifo_write __P((struct vop_write_args *)); 102static int nfsspec_close __P((struct vop_close_args *)); 103static int nfsfifo_close __P((struct vop_close_args *)); 104#define nfs_poll vop_nopoll 105static int nfs_flush __P((struct vnode *,struct ucred *,int,struct proc *,int)); 106static int nfs_setattrrpc __P((struct vnode *,struct vattr *,struct ucred *,struct proc *)); 107static int nfs_lookup __P((struct vop_lookup_args *)); 108static int nfs_create __P((struct vop_create_args *)); 109static int nfs_mknod __P((struct vop_mknod_args *)); 110static int nfs_open __P((struct vop_open_args *)); 111static int nfs_close __P((struct vop_close_args *)); 112static int nfs_access __P((struct vop_access_args *)); 113static int nfs_getattr __P((struct vop_getattr_args *)); 114static int nfs_setattr __P((struct vop_setattr_args *)); 115static int nfs_read __P((struct vop_read_args *)); 116static int nfs_mmap __P((struct vop_mmap_args *)); 117static int nfs_fsync __P((struct vop_fsync_args *)); 118static int nfs_remove __P((struct vop_remove_args *)); 119static int nfs_link __P((struct vop_link_args *)); 120static int nfs_rename __P((struct vop_rename_args *)); 121static int nfs_mkdir __P((struct vop_mkdir_args *)); 122static int nfs_rmdir __P((struct vop_rmdir_args *)); 123static int nfs_symlink __P((struct vop_symlink_args *)); 124static int nfs_readdir __P((struct vop_readdir_args *)); 125static int nfs_bmap __P((struct vop_bmap_args *)); 126static int nfs_strategy __P((struct vop_strategy_args *)); 127static int nfs_lookitup __P((struct vnode *, const char *, int, 128 struct ucred *, struct proc *, struct nfsnode **)); 129static int nfs_sillyrename __P((struct vnode *,struct vnode *,struct componentname *)); 130static int nfsspec_access __P((struct vop_access_args *)); 131static int nfs_readlink __P((struct vop_readlink_args *)); 132static int nfs_print __P((struct vop_print_args *)); 133static int nfs_advlock __P((struct vop_advlock_args *)); 134static int nfs_bwrite __P((struct vop_bwrite_args *)); 135/* 136 * Global vfs data structures for nfs 137 */ 138vop_t **nfsv2_vnodeop_p; 139static struct vnodeopv_entry_desc nfsv2_vnodeop_entries[] = { 140 { &vop_default_desc, (vop_t *) vop_defaultop }, 141 { &vop_abortop_desc, (vop_t *) nfs_abortop }, 142 { &vop_access_desc, (vop_t *) nfs_access }, 143 { &vop_advlock_desc, (vop_t *) nfs_advlock }, 144 { &vop_bmap_desc, (vop_t *) nfs_bmap }, 145 { &vop_bwrite_desc, (vop_t *) nfs_bwrite }, 146 { &vop_close_desc, (vop_t *) nfs_close }, 147 { &vop_create_desc, (vop_t *) nfs_create }, 148 { &vop_fsync_desc, (vop_t *) nfs_fsync }, 149 { &vop_getattr_desc, (vop_t *) nfs_getattr }, 150 { &vop_getpages_desc, (vop_t *) nfs_getpages }, 151 { &vop_putpages_desc, (vop_t *) nfs_putpages }, 152 { &vop_inactive_desc, (vop_t *) nfs_inactive }, 153 { &vop_lease_desc, (vop_t *) vop_null }, 154 { &vop_link_desc, (vop_t *) nfs_link }, 155 { &vop_lock_desc, (vop_t *) vop_sharedlock }, 156 { &vop_lookup_desc, (vop_t *) nfs_lookup }, 157 { &vop_mkdir_desc, (vop_t *) nfs_mkdir }, 158 { &vop_mknod_desc, (vop_t *) nfs_mknod }, 159 { &vop_mmap_desc, (vop_t *) nfs_mmap }, 160 { &vop_open_desc, (vop_t *) nfs_open }, 161 { &vop_poll_desc, (vop_t *) nfs_poll }, 162 { &vop_print_desc, (vop_t *) nfs_print }, 163 { &vop_read_desc, (vop_t *) nfs_read }, 164 { &vop_readdir_desc, (vop_t *) nfs_readdir }, 165 { &vop_readlink_desc, (vop_t *) nfs_readlink }, 166 { &vop_reclaim_desc, (vop_t *) nfs_reclaim }, 167 { &vop_remove_desc, (vop_t *) nfs_remove }, 168 { &vop_rename_desc, (vop_t *) nfs_rename }, 169 { &vop_rmdir_desc, (vop_t *) nfs_rmdir }, 170 { &vop_setattr_desc, (vop_t *) nfs_setattr }, 171 { &vop_strategy_desc, (vop_t *) nfs_strategy }, 172 { &vop_symlink_desc, (vop_t *) nfs_symlink }, 173 { &vop_write_desc, (vop_t *) nfs_write }, 174 { NULL, NULL } 175}; 176static struct vnodeopv_desc nfsv2_vnodeop_opv_desc = 177 { &nfsv2_vnodeop_p, nfsv2_vnodeop_entries }; 178VNODEOP_SET(nfsv2_vnodeop_opv_desc); 179 180/* 181 * Special device vnode ops 182 */ 183vop_t **spec_nfsv2nodeop_p; 184static struct vnodeopv_entry_desc nfsv2_specop_entries[] = { 185 { &vop_default_desc, (vop_t *) spec_vnoperate }, 186 { &vop_access_desc, (vop_t *) nfsspec_access }, 187 { &vop_close_desc, (vop_t *) nfsspec_close }, 188 { &vop_fsync_desc, (vop_t *) nfs_fsync }, 189 { &vop_getattr_desc, (vop_t *) nfs_getattr }, 190 { &vop_inactive_desc, (vop_t *) nfs_inactive }, 191 { &vop_lock_desc, (vop_t *) vop_sharedlock }, 192 { &vop_print_desc, (vop_t *) nfs_print }, 193 { &vop_read_desc, (vop_t *) nfsspec_read }, 194 { &vop_reclaim_desc, (vop_t *) nfs_reclaim }, 195 { &vop_setattr_desc, (vop_t *) nfs_setattr }, 196 { &vop_write_desc, (vop_t *) nfsspec_write }, 197 { NULL, NULL } 198}; 199static struct vnodeopv_desc spec_nfsv2nodeop_opv_desc = 200 { &spec_nfsv2nodeop_p, nfsv2_specop_entries }; 201VNODEOP_SET(spec_nfsv2nodeop_opv_desc); 202 203vop_t **fifo_nfsv2nodeop_p; 204static struct vnodeopv_entry_desc nfsv2_fifoop_entries[] = { 205 { &vop_default_desc, (vop_t *) fifo_vnoperate }, 206 { &vop_access_desc, (vop_t *) nfsspec_access }, 207 { &vop_close_desc, (vop_t *) nfsfifo_close }, 208 { &vop_fsync_desc, (vop_t *) nfs_fsync }, 209 { &vop_getattr_desc, (vop_t *) nfs_getattr }, 210 { &vop_inactive_desc, (vop_t *) nfs_inactive }, 211 { &vop_lock_desc, (vop_t *) vop_sharedlock }, 212 { &vop_print_desc, (vop_t *) nfs_print }, 213 { &vop_read_desc, (vop_t *) nfsfifo_read }, 214 { &vop_reclaim_desc, (vop_t *) nfs_reclaim }, 215 { &vop_setattr_desc, (vop_t *) nfs_setattr }, 216 { &vop_write_desc, (vop_t *) nfsfifo_write }, 217 { NULL, NULL } 218}; 219static struct vnodeopv_desc fifo_nfsv2nodeop_opv_desc = 220 { &fifo_nfsv2nodeop_p, nfsv2_fifoop_entries }; 221VNODEOP_SET(fifo_nfsv2nodeop_opv_desc); 222 223static int nfs_commit __P((struct vnode *vp, u_quad_t offset, int cnt, 224 struct ucred *cred, struct proc *procp)); 225static int nfs_mknodrpc __P((struct vnode *dvp, struct vnode **vpp, 226 struct componentname *cnp, 227 struct vattr *vap)); 228static int nfs_removerpc __P((struct vnode *dvp, const char *name, 229 int namelen, 230 struct ucred *cred, struct proc *proc)); 231static int nfs_renamerpc __P((struct vnode *fdvp, const char *fnameptr, 232 int fnamelen, struct vnode *tdvp, 233 const char *tnameptr, int tnamelen, 234 struct ucred *cred, struct proc *proc)); 235static int nfs_renameit __P((struct vnode *sdvp, 236 struct componentname *scnp, 237 struct sillyrename *sp)); 238 239/* 240 * Global variables 241 */ 242extern u_int32_t nfs_true, nfs_false; 243extern u_int32_t nfs_xdrneg1; 244extern struct nfsstats nfsstats; 245extern nfstype nfsv3_type[9]; 246struct proc *nfs_iodwant[NFS_MAXASYNCDAEMON]; 247struct nfsmount *nfs_iodmount[NFS_MAXASYNCDAEMON]; 248int nfs_numasync = 0; 249#define DIRHDSIZ (sizeof (struct dirent) - (MAXNAMLEN + 1)) 250 251SYSCTL_DECL(_vfs_nfs); 252 253static int nfsaccess_cache_timeout = 2; 254SYSCTL_INT(_vfs_nfs, OID_AUTO, access_cache_timeout, CTLFLAG_RW, 255 &nfsaccess_cache_timeout, 0, "NFS ACCESS cache timeout"); 256 257static int nfsaccess_cache_hits; 258SYSCTL_INT(_vfs_nfs, OID_AUTO, access_cache_hits, CTLFLAG_RD, 259 &nfsaccess_cache_hits, 0, "NFS ACCESS cache hit count"); 260 261static int nfsaccess_cache_fills; 262SYSCTL_INT(_vfs_nfs, OID_AUTO, access_cache_fills, CTLFLAG_RD, 263 &nfsaccess_cache_fills, 0, "NFS ACCESS cache fill count"); 264 265/* 266 * nfs access vnode op. 267 * For nfs version 2, just return ok. File accesses may fail later. 268 * For nfs version 3, use the access rpc to check accessibility. If file modes 269 * are changed on the server, accesses might still fail later. 270 */ 271static int 272nfs_access(ap) 273 struct vop_access_args /* { 274 struct vnode *a_vp; 275 int a_mode; 276 struct ucred *a_cred; 277 struct proc *a_p; 278 } */ *ap; 279{ 280 register struct vnode *vp = ap->a_vp; 281 register u_int32_t *tl; 282 register caddr_t cp; 283 register int32_t t1, t2; 284 caddr_t bpos, dpos, cp2; 285 int error = 0, attrflag; 286 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 287 u_int32_t mode, rmode, wmode; 288 int v3 = NFS_ISV3(vp); 289 struct nfsnode *np = VTONFS(vp); 290 291 /* 292 * Disallow write attempts on filesystems mounted read-only; 293 * unless the file is a socket, fifo, or a block or character 294 * device resident on the filesystem. 295 */ 296 if ((ap->a_mode & VWRITE) && (vp->v_mount->mnt_flag & MNT_RDONLY)) { 297 switch (vp->v_type) { 298 case VREG: 299 case VDIR: 300 case VLNK: 301 return (EROFS); 302 default: 303 break; 304 } 305 } 306 /* 307 * For nfs v3, check to see if we have done this recently, and if 308 * so return our cached result instead of making an ACCESS call. 309 * If not, 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. 313 */ 314 if (v3) { 315 if (ap->a_mode & VREAD) 316 mode = NFSV3ACCESS_READ; 317 else 318 mode = 0; 319 if (vp->v_type != VDIR) { 320 if (ap->a_mode & VWRITE) 321 mode |= (NFSV3ACCESS_MODIFY | NFSV3ACCESS_EXTEND); 322 if (ap->a_mode & VEXEC) 323 mode |= NFSV3ACCESS_EXECUTE; 324 } else { 325 if (ap->a_mode & VWRITE) 326 mode |= (NFSV3ACCESS_MODIFY | NFSV3ACCESS_EXTEND | 327 NFSV3ACCESS_DELETE); 328 if (ap->a_mode & VEXEC) 329 mode |= NFSV3ACCESS_LOOKUP; 330 } 331 /* XXX safety belt, only make blanket request if caching */ 332 if (nfsaccess_cache_timeout > 0) { 333 wmode = NFSV3ACCESS_READ | NFSV3ACCESS_MODIFY | 334 NFSV3ACCESS_EXTEND | NFSV3ACCESS_EXECUTE | 335 NFSV3ACCESS_DELETE | NFSV3ACCESS_LOOKUP; 336 } else { 337 wmode = mode; 338 } 339 340 /* 341 * Does our cached result allow us to give a definite yes to 342 * this request? 343 */ 344 if ((time_second < (np->n_modestamp + nfsaccess_cache_timeout)) && 345 (ap->a_cred->cr_uid == np->n_modeuid) && 346 ((np->n_mode & mode) == mode)) { 347 nfsaccess_cache_hits++; 348 } else { 349 /* 350 * Either a no, or a don't know. Go to the wire. 351 */ 352 nfsstats.rpccnt[NFSPROC_ACCESS]++; 353 nfsm_reqhead(vp, NFSPROC_ACCESS, NFSX_FH(v3) + NFSX_UNSIGNED); 354 nfsm_fhtom(vp, v3); 355 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); 356 *tl = txdr_unsigned(wmode); 357 nfsm_request(vp, NFSPROC_ACCESS, ap->a_p, ap->a_cred); 358 nfsm_postop_attr(vp, attrflag); 359 if (!error) { 360 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 361 rmode = fxdr_unsigned(u_int32_t, *tl); 362 /* 363 * The NFS V3 spec does not clarify whether or not 364 * the returned access bits can be a superset of 365 * the ones requested, so... 366 */ 367 if ((rmode & mode) != mode) { 368 error = EACCES; 369 } else if (nfsaccess_cache_timeout > 0) { 370 /* cache the result */ 371 nfsaccess_cache_fills++; 372 np->n_mode = rmode; 373 np->n_modeuid = ap->a_cred->cr_uid; 374 np->n_modestamp = time_second; 375 } 376 } 377 nfsm_reqdone; 378 } 379 return (error); 380 } else { 381 if ((error = nfsspec_access(ap)) != 0) 382 return (error); 383 384 /* 385 * Attempt to prevent a mapped root from accessing a file 386 * which it shouldn't. We try to read a byte from the file 387 * if the user is root and the file is not zero length. 388 * After calling nfsspec_access, we should have the correct 389 * file size cached. 390 */ 391 if (ap->a_cred->cr_uid == 0 && (ap->a_mode & VREAD) 392 && VTONFS(vp)->n_size > 0) { 393 struct iovec aiov; 394 struct uio auio; 395 char buf[1]; 396 397 aiov.iov_base = buf; 398 aiov.iov_len = 1; 399 auio.uio_iov = &aiov; 400 auio.uio_iovcnt = 1; 401 auio.uio_offset = 0; 402 auio.uio_resid = 1; 403 auio.uio_segflg = UIO_SYSSPACE; 404 auio.uio_rw = UIO_READ; 405 auio.uio_procp = ap->a_p; 406 407 if (vp->v_type == VREG) 408 error = nfs_readrpc(vp, &auio, ap->a_cred); 409 else if (vp->v_type == VDIR) { 410 char* bp; 411 bp = malloc(NFS_DIRBLKSIZ, M_TEMP, M_WAITOK); 412 aiov.iov_base = bp; 413 aiov.iov_len = auio.uio_resid = NFS_DIRBLKSIZ; 414 error = nfs_readdirrpc(vp, &auio, ap->a_cred); 415 free(bp, M_TEMP); 416 } else if (vp->v_type == VLNK) 417 error = nfs_readlinkrpc(vp, &auio, ap->a_cred); 418 else 419 error = EACCES; 420 } 421 return (error); 422 } 423} 424 425/* 426 * nfs open vnode op 427 * Check to see if the type is ok 428 * and that deletion is not in progress. 429 * For paged in text files, you will need to flush the page cache 430 * if consistency is lost. 431 */ 432/* ARGSUSED */ 433static int 434nfs_open(ap) 435 struct vop_open_args /* { 436 struct vnode *a_vp; 437 int a_mode; 438 struct ucred *a_cred; 439 struct proc *a_p; 440 } */ *ap; 441{ 442 register struct vnode *vp = ap->a_vp; 443 struct nfsnode *np = VTONFS(vp); 444 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 445 struct vattr vattr; 446 int error; 447 448 if (vp->v_type != VREG && vp->v_type != VDIR && vp->v_type != VLNK) { 449#ifdef DIAGNOSTIC 450 printf("open eacces vtyp=%d\n",vp->v_type); 451#endif 452 return (EACCES); 453 } 454 /* 455 * Get a valid lease. If cached data is stale, flush it. 456 */ 457 if (nmp->nm_flag & NFSMNT_NQNFS) { 458 if (NQNFS_CKINVALID(vp, np, ND_READ)) { 459 do { 460 error = nqnfs_getlease(vp, ND_READ, ap->a_cred, 461 ap->a_p); 462 } while (error == NQNFS_EXPIRED); 463 if (error) 464 return (error); 465 if (np->n_lrev != np->n_brev || 466 (np->n_flag & NQNFSNONCACHE)) { 467 if ((error = nfs_vinvalbuf(vp, V_SAVE, ap->a_cred, 468 ap->a_p, 1)) == EINTR) 469 return (error); 470 np->n_brev = np->n_lrev; 471 } 472 } 473 } else { 474 if (np->n_flag & NMODIFIED) { 475 if ((error = nfs_vinvalbuf(vp, V_SAVE, ap->a_cred, 476 ap->a_p, 1)) == EINTR) 477 return (error); 478 np->n_attrstamp = 0; 479 if (vp->v_type == VDIR) 480 np->n_direofoffset = 0; 481 error = VOP_GETATTR(vp, &vattr, ap->a_cred, ap->a_p); 482 if (error) 483 return (error); 484 np->n_mtime = vattr.va_mtime.tv_sec; 485 } else { 486 error = VOP_GETATTR(vp, &vattr, ap->a_cred, ap->a_p); 487 if (error) 488 return (error); 489 if (np->n_mtime != vattr.va_mtime.tv_sec) { 490 if (vp->v_type == VDIR) 491 np->n_direofoffset = 0; 492 if ((error = nfs_vinvalbuf(vp, V_SAVE, 493 ap->a_cred, ap->a_p, 1)) == EINTR) 494 return (error); 495 np->n_mtime = vattr.va_mtime.tv_sec; 496 } 497 } 498 } 499 if ((nmp->nm_flag & NFSMNT_NQNFS) == 0) 500 np->n_attrstamp = 0; /* For Open/Close consistency */ 501 return (0); 502} 503 504/* 505 * nfs close vnode op 506 * What an NFS client should do upon close after writing is a debatable issue. 507 * Most NFS clients push delayed writes to the server upon close, basically for 508 * two reasons: 509 * 1 - So that any write errors may be reported back to the client process 510 * doing the close system call. By far the two most likely errors are 511 * NFSERR_NOSPC and NFSERR_DQUOT to indicate space allocation failure. 512 * 2 - To put a worst case upper bound on cache inconsistency between 513 * multiple clients for the file. 514 * There is also a consistency problem for Version 2 of the protocol w.r.t. 515 * not being able to tell if other clients are writing a file concurrently, 516 * since there is no way of knowing if the changed modify time in the reply 517 * is only due to the write for this client. 518 * (NFS Version 3 provides weak cache consistency data in the reply that 519 * should be sufficient to detect and handle this case.) 520 * 521 * The current code does the following: 522 * for NFS Version 2 - play it safe and flush/invalidate all dirty buffers 523 * for NFS Version 3 - flush dirty buffers to the server but don't invalidate 524 * or commit them (this satisfies 1 and 2 except for the 525 * case where the server crashes after this close but 526 * before the commit RPC, which is felt to be "good 527 * enough". Changing the last argument to nfs_flush() to 528 * a 1 would force a commit operation, if it is felt a 529 * commit is necessary now. 530 * for NQNFS - do nothing now, since 2 is dealt with via leases and 531 * 1 should be dealt with via an fsync() system call for 532 * cases where write errors are important. 533 */ 534/* ARGSUSED */ 535static int 536nfs_close(ap) 537 struct vop_close_args /* { 538 struct vnodeop_desc *a_desc; 539 struct vnode *a_vp; 540 int a_fflag; 541 struct ucred *a_cred; 542 struct proc *a_p; 543 } */ *ap; 544{ 545 register struct vnode *vp = ap->a_vp; 546 register struct nfsnode *np = VTONFS(vp); 547 int error = 0; 548 549 if (vp->v_type == VREG) { 550 if ((VFSTONFS(vp->v_mount)->nm_flag & NFSMNT_NQNFS) == 0 && 551 (np->n_flag & NMODIFIED)) { 552 if (NFS_ISV3(vp)) { 553 error = nfs_flush(vp, ap->a_cred, MNT_WAIT, ap->a_p, 0); 554 np->n_flag &= ~NMODIFIED; 555 } else 556 error = nfs_vinvalbuf(vp, V_SAVE, ap->a_cred, ap->a_p, 1); 557 np->n_attrstamp = 0; 558 } 559 if (np->n_flag & NWRITEERR) { 560 np->n_flag &= ~NWRITEERR; 561 error = np->n_error; 562 } 563 } 564 return (error); 565} 566 567/* 568 * nfs getattr call from vfs. 569 */ 570static int 571nfs_getattr(ap) 572 struct vop_getattr_args /* { 573 struct vnode *a_vp; 574 struct vattr *a_vap; 575 struct ucred *a_cred; 576 struct proc *a_p; 577 } */ *ap; 578{ 579 register struct vnode *vp = ap->a_vp; 580 register struct nfsnode *np = VTONFS(vp); 581 register caddr_t cp; 582 register u_int32_t *tl; 583 register int32_t t1, t2; 584 caddr_t bpos, dpos; 585 int error = 0; 586 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 587 int v3 = NFS_ISV3(vp); 588 589 /* 590 * Update local times for special files. 591 */ 592 if (np->n_flag & (NACC | NUPD)) 593 np->n_flag |= NCHG; 594 /* 595 * First look in the cache. 596 */ 597 if (nfs_getattrcache(vp, ap->a_vap) == 0) 598 return (0); 599 nfsstats.rpccnt[NFSPROC_GETATTR]++; 600 nfsm_reqhead(vp, NFSPROC_GETATTR, NFSX_FH(v3)); 601 nfsm_fhtom(vp, v3); 602 nfsm_request(vp, NFSPROC_GETATTR, ap->a_p, ap->a_cred); 603 if (!error) { 604 nfsm_loadattr(vp, ap->a_vap); 605 } 606 nfsm_reqdone; 607 return (error); 608} 609 610/* 611 * nfs setattr call. 612 */ 613static int 614nfs_setattr(ap) 615 struct vop_setattr_args /* { 616 struct vnodeop_desc *a_desc; 617 struct vnode *a_vp; 618 struct vattr *a_vap; 619 struct ucred *a_cred; 620 struct proc *a_p; 621 } */ *ap; 622{ 623 register struct vnode *vp = ap->a_vp; 624 register struct nfsnode *np = VTONFS(vp); 625 register struct vattr *vap = ap->a_vap; 626 int error = 0; 627 u_quad_t tsize; 628 629#ifndef nolint 630 tsize = (u_quad_t)0; 631#endif 632 633 /* 634 * Setting of flags is not supported. 635 */ 636 if (vap->va_flags != VNOVAL) 637 return (EOPNOTSUPP); 638 639 /* 640 * Disallow write attempts if the filesystem is mounted read-only. 641 */ 642 if ((vap->va_flags != VNOVAL || vap->va_uid != (uid_t)VNOVAL || 643 vap->va_gid != (gid_t)VNOVAL || vap->va_atime.tv_sec != VNOVAL || 644 vap->va_mtime.tv_sec != VNOVAL || vap->va_mode != (mode_t)VNOVAL) && 645 (vp->v_mount->mnt_flag & MNT_RDONLY)) 646 return (EROFS); 647 if (vap->va_size != VNOVAL) { 648 switch (vp->v_type) { 649 case VDIR: 650 return (EISDIR); 651 case VCHR: 652 case VBLK: 653 case VSOCK: 654 case VFIFO: 655 if (vap->va_mtime.tv_sec == VNOVAL && 656 vap->va_atime.tv_sec == VNOVAL && 657 vap->va_mode == (mode_t)VNOVAL && 658 vap->va_uid == (uid_t)VNOVAL && 659 vap->va_gid == (gid_t)VNOVAL) 660 return (0); 661 vap->va_size = VNOVAL; 662 break; 663 default: 664 /* 665 * Disallow write attempts if the filesystem is 666 * mounted read-only. 667 */ 668 if (vp->v_mount->mnt_flag & MNT_RDONLY) 669 return (EROFS); 670 vnode_pager_setsize(vp, vap->va_size); 671 if (np->n_flag & NMODIFIED) { 672 if (vap->va_size == 0) 673 error = nfs_vinvalbuf(vp, 0, 674 ap->a_cred, ap->a_p, 1); 675 else 676 error = nfs_vinvalbuf(vp, V_SAVE, 677 ap->a_cred, ap->a_p, 1); 678 if (error) { 679 vnode_pager_setsize(vp, np->n_size); 680 return (error); 681 } 682 } 683 tsize = np->n_size; 684 np->n_size = np->n_vattr.va_size = vap->va_size; 685 }; 686 } else if ((vap->va_mtime.tv_sec != VNOVAL || 687 vap->va_atime.tv_sec != VNOVAL) && (np->n_flag & NMODIFIED) && 688 vp->v_type == VREG && 689 (error = nfs_vinvalbuf(vp, V_SAVE, ap->a_cred, 690 ap->a_p, 1)) == EINTR) 691 return (error); 692 error = nfs_setattrrpc(vp, vap, ap->a_cred, ap->a_p); 693 if (error && vap->va_size != VNOVAL) { 694 np->n_size = np->n_vattr.va_size = tsize; 695 vnode_pager_setsize(vp, np->n_size); 696 } 697 return (error); 698} 699 700/* 701 * Do an nfs setattr rpc. 702 */ 703static int 704nfs_setattrrpc(vp, vap, cred, procp) 705 register struct vnode *vp; 706 register struct vattr *vap; 707 struct ucred *cred; 708 struct proc *procp; 709{ 710 register struct nfsv2_sattr *sp; 711 register caddr_t cp; 712 register int32_t t1, t2; 713 caddr_t bpos, dpos, cp2; 714 u_int32_t *tl; 715 int error = 0, wccflag = NFSV3_WCCRATTR; 716 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 717 int v3 = NFS_ISV3(vp); 718 719 nfsstats.rpccnt[NFSPROC_SETATTR]++; 720 nfsm_reqhead(vp, NFSPROC_SETATTR, NFSX_FH(v3) + NFSX_SATTR(v3)); 721 nfsm_fhtom(vp, v3); 722 if (v3) { 723 nfsm_v3attrbuild(vap, TRUE); 724 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); 725 *tl = nfs_false; 726 } else { 727 nfsm_build(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 728 if (vap->va_mode == (mode_t)VNOVAL) 729 sp->sa_mode = nfs_xdrneg1; 730 else 731 sp->sa_mode = vtonfsv2_mode(vp->v_type, vap->va_mode); 732 if (vap->va_uid == (uid_t)VNOVAL) 733 sp->sa_uid = nfs_xdrneg1; 734 else 735 sp->sa_uid = txdr_unsigned(vap->va_uid); 736 if (vap->va_gid == (gid_t)VNOVAL) 737 sp->sa_gid = nfs_xdrneg1; 738 else 739 sp->sa_gid = txdr_unsigned(vap->va_gid); 740 sp->sa_size = txdr_unsigned(vap->va_size); 741 txdr_nfsv2time(&vap->va_atime, &sp->sa_atime); 742 txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime); 743 } 744 nfsm_request(vp, NFSPROC_SETATTR, procp, cred); 745 if (v3) { 746 nfsm_wcc_data(vp, wccflag); 747 } else 748 nfsm_loadattr(vp, (struct vattr *)0); 749 nfsm_reqdone; 750 return (error); 751} 752 753/* 754 * nfs lookup call, one step at a time... 755 * First look in cache 756 * If not found, unlock the directory nfsnode and do the rpc 757 */ 758static int 759nfs_lookup(ap) 760 struct vop_lookup_args /* { 761 struct vnodeop_desc *a_desc; 762 struct vnode *a_dvp; 763 struct vnode **a_vpp; 764 struct componentname *a_cnp; 765 } */ *ap; 766{ 767 struct componentname *cnp = ap->a_cnp; 768 struct vnode *dvp = ap->a_dvp; 769 struct vnode **vpp = ap->a_vpp; 770 int flags = cnp->cn_flags; 771 struct vnode *newvp; 772 u_int32_t *tl; 773 caddr_t cp; 774 int32_t t1, t2; 775 struct nfsmount *nmp; 776 caddr_t bpos, dpos, cp2; 777 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 778 long len; 779 nfsfh_t *fhp; 780 struct nfsnode *np; 781 int lockparent, wantparent, error = 0, attrflag, fhsize; 782 int v3 = NFS_ISV3(dvp); 783 struct proc *p = cnp->cn_proc; 784 785 *vpp = NULLVP; 786 if ((flags & ISLASTCN) && (dvp->v_mount->mnt_flag & MNT_RDONLY) && 787 (cnp->cn_nameiop == DELETE || cnp->cn_nameiop == RENAME)) 788 return (EROFS); 789 if (dvp->v_type != VDIR) 790 return (ENOTDIR); 791 lockparent = flags & LOCKPARENT; 792 wantparent = flags & (LOCKPARENT|WANTPARENT); 793 nmp = VFSTONFS(dvp->v_mount); 794 np = VTONFS(dvp); 795 if ((error = cache_lookup(dvp, vpp, cnp)) && error != ENOENT) { 796 struct vattr vattr; 797 int vpid; 798 799 if ((error = VOP_ACCESS(dvp, VEXEC, cnp->cn_cred, p)) != 0) { 800 *vpp = NULLVP; 801 return (error); 802 } 803 804 newvp = *vpp; 805 vpid = newvp->v_id; 806 /* 807 * See the comment starting `Step through' in ufs/ufs_lookup.c 808 * for an explanation of the locking protocol 809 */ 810 if (dvp == newvp) { 811 VREF(newvp); 812 error = 0; 813 } else if (flags & ISDOTDOT) { 814 VOP_UNLOCK(dvp, 0, p); 815 error = vget(newvp, LK_EXCLUSIVE, p); 816 if (!error && lockparent && (flags & ISLASTCN)) 817 error = vn_lock(dvp, LK_EXCLUSIVE, p); 818 } else { 819 error = vget(newvp, LK_EXCLUSIVE, p); 820 if (!lockparent || error || !(flags & ISLASTCN)) 821 VOP_UNLOCK(dvp, 0, p); 822 } 823 if (!error) { 824 if (vpid == newvp->v_id) { 825 if (!VOP_GETATTR(newvp, &vattr, cnp->cn_cred, p) 826 && vattr.va_ctime.tv_sec == VTONFS(newvp)->n_ctime) { 827 nfsstats.lookupcache_hits++; 828 if (cnp->cn_nameiop != LOOKUP && 829 (flags & ISLASTCN)) 830 cnp->cn_flags |= SAVENAME; 831 return (0); 832 } 833 cache_purge(newvp); 834 } 835 vput(newvp); 836 if (lockparent && dvp != newvp && (flags & ISLASTCN)) 837 VOP_UNLOCK(dvp, 0, p); 838 } 839 error = vn_lock(dvp, LK_EXCLUSIVE, p); 840 *vpp = NULLVP; 841 if (error) 842 return (error); 843 } 844 error = 0; 845 newvp = NULLVP; 846 nfsstats.lookupcache_misses++; 847 nfsstats.rpccnt[NFSPROC_LOOKUP]++; 848 len = cnp->cn_namelen; 849 nfsm_reqhead(dvp, NFSPROC_LOOKUP, 850 NFSX_FH(v3) + NFSX_UNSIGNED + nfsm_rndup(len)); 851 nfsm_fhtom(dvp, v3); 852 nfsm_strtom(cnp->cn_nameptr, len, NFS_MAXNAMLEN); 853 nfsm_request(dvp, NFSPROC_LOOKUP, cnp->cn_proc, cnp->cn_cred); 854 if (error) { 855 nfsm_postop_attr(dvp, attrflag); 856 m_freem(mrep); 857 goto nfsmout; 858 } 859 nfsm_getfh(fhp, fhsize, v3); 860 861 /* 862 * Handle RENAME case... 863 */ 864 if (cnp->cn_nameiop == RENAME && wantparent && (flags & ISLASTCN)) { 865 if (NFS_CMPFH(np, fhp, fhsize)) { 866 m_freem(mrep); 867 return (EISDIR); 868 } 869 error = nfs_nget(dvp->v_mount, fhp, fhsize, &np); 870 if (error) { 871 m_freem(mrep); 872 return (error); 873 } 874 newvp = NFSTOV(np); 875 if (v3) { 876 nfsm_postop_attr(newvp, attrflag); 877 nfsm_postop_attr(dvp, attrflag); 878 } else 879 nfsm_loadattr(newvp, (struct vattr *)0); 880 *vpp = newvp; 881 m_freem(mrep); 882 cnp->cn_flags |= SAVENAME; 883 if (!lockparent) 884 VOP_UNLOCK(dvp, 0, p); 885 return (0); 886 } 887 888 if (flags & ISDOTDOT) { 889 VOP_UNLOCK(dvp, 0, p); 890 error = nfs_nget(dvp->v_mount, fhp, fhsize, &np); 891 if (error) { 892 vn_lock(dvp, LK_EXCLUSIVE | LK_RETRY, p); 893 return (error); 894 } 895 newvp = NFSTOV(np); 896 if (lockparent && (flags & ISLASTCN) && 897 (error = vn_lock(dvp, LK_EXCLUSIVE, p))) { 898 vput(newvp); 899 return (error); 900 } 901 } else if (NFS_CMPFH(np, fhp, fhsize)) { 902 VREF(dvp); 903 newvp = dvp; 904 } else { 905 error = nfs_nget(dvp->v_mount, fhp, fhsize, &np); 906 if (error) { 907 m_freem(mrep); 908 return (error); 909 } 910 if (!lockparent || !(flags & ISLASTCN)) 911 VOP_UNLOCK(dvp, 0, p); 912 newvp = NFSTOV(np); 913 } 914 if (v3) { 915 nfsm_postop_attr(newvp, attrflag); 916 nfsm_postop_attr(dvp, attrflag); 917 } else 918 nfsm_loadattr(newvp, (struct vattr *)0); 919 if (cnp->cn_nameiop != LOOKUP && (flags & ISLASTCN)) 920 cnp->cn_flags |= SAVENAME; 921 if ((cnp->cn_flags & MAKEENTRY) && 922 (cnp->cn_nameiop != DELETE || !(flags & ISLASTCN))) { 923 np->n_ctime = np->n_vattr.va_ctime.tv_sec; 924 cache_enter(dvp, newvp, cnp); 925 } 926 *vpp = newvp; 927 nfsm_reqdone; 928 if (error) { 929 if (newvp != NULLVP) { 930 vrele(newvp); 931 *vpp = NULLVP; 932 } 933 if ((cnp->cn_nameiop == CREATE || cnp->cn_nameiop == RENAME) && 934 (flags & ISLASTCN) && error == ENOENT) { 935 if (!lockparent) 936 VOP_UNLOCK(dvp, 0, p); 937 if (dvp->v_mount->mnt_flag & MNT_RDONLY) 938 error = EROFS; 939 else 940 error = EJUSTRETURN; 941 } 942 if (cnp->cn_nameiop != LOOKUP && (flags & ISLASTCN)) 943 cnp->cn_flags |= SAVENAME; 944 } 945 return (error); 946} 947 948/* 949 * nfs read call. 950 * Just call nfs_bioread() to do the work. 951 */ 952static int 953nfs_read(ap) 954 struct vop_read_args /* { 955 struct vnode *a_vp; 956 struct uio *a_uio; 957 int a_ioflag; 958 struct ucred *a_cred; 959 } */ *ap; 960{ 961 register struct vnode *vp = ap->a_vp; 962 963 if (vp->v_type != VREG) 964 return (EPERM); 965 return (nfs_bioread(vp, ap->a_uio, ap->a_ioflag, ap->a_cred)); 966} 967 968/* 969 * nfs readlink call 970 */ 971static int 972nfs_readlink(ap) 973 struct vop_readlink_args /* { 974 struct vnode *a_vp; 975 struct uio *a_uio; 976 struct ucred *a_cred; 977 } */ *ap; 978{ 979 register struct vnode *vp = ap->a_vp; 980 981 if (vp->v_type != VLNK) 982 return (EINVAL); 983 return (nfs_bioread(vp, ap->a_uio, 0, ap->a_cred)); 984} 985 986/* 987 * Do a readlink rpc. 988 * Called by nfs_doio() from below the buffer cache. 989 */ 990int 991nfs_readlinkrpc(vp, uiop, cred) 992 register struct vnode *vp; 993 struct uio *uiop; 994 struct ucred *cred; 995{ 996 register u_int32_t *tl; 997 register caddr_t cp; 998 register int32_t t1, t2; 999 caddr_t bpos, dpos, cp2; 1000 int error = 0, len, attrflag; 1001 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 1002 int v3 = NFS_ISV3(vp); 1003 1004 nfsstats.rpccnt[NFSPROC_READLINK]++; 1005 nfsm_reqhead(vp, NFSPROC_READLINK, NFSX_FH(v3)); 1006 nfsm_fhtom(vp, v3); 1007 nfsm_request(vp, NFSPROC_READLINK, uiop->uio_procp, cred); 1008 if (v3) 1009 nfsm_postop_attr(vp, attrflag); 1010 if (!error) { 1011 nfsm_strsiz(len, NFS_MAXPATHLEN); 1012 nfsm_mtouio(uiop, len); 1013 } 1014 nfsm_reqdone; 1015 return (error); 1016} 1017 1018/* 1019 * nfs read rpc call 1020 * Ditto above 1021 */ 1022int 1023nfs_readrpc(vp, uiop, cred) 1024 register struct vnode *vp; 1025 struct uio *uiop; 1026 struct ucred *cred; 1027{ 1028 register u_int32_t *tl; 1029 register caddr_t cp; 1030 register int32_t t1, t2; 1031 caddr_t bpos, dpos, cp2; 1032 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 1033 struct nfsmount *nmp; 1034 int error = 0, len, retlen, tsiz, eof, attrflag; 1035 int v3 = NFS_ISV3(vp); 1036 1037#ifndef nolint 1038 eof = 0; 1039#endif 1040 nmp = VFSTONFS(vp->v_mount); 1041 tsiz = uiop->uio_resid; 1042 if (uiop->uio_offset + tsiz > nmp->nm_maxfilesize) 1043 return (EFBIG); 1044 while (tsiz > 0) { 1045 nfsstats.rpccnt[NFSPROC_READ]++; 1046 len = (tsiz > nmp->nm_rsize) ? nmp->nm_rsize : tsiz; 1047 nfsm_reqhead(vp, NFSPROC_READ, NFSX_FH(v3) + NFSX_UNSIGNED * 3); 1048 nfsm_fhtom(vp, v3); 1049 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED * 3); 1050 if (v3) { 1051 txdr_hyper(&uiop->uio_offset, tl); 1052 *(tl + 2) = txdr_unsigned(len); 1053 } else { 1054 *tl++ = txdr_unsigned(uiop->uio_offset); 1055 *tl++ = txdr_unsigned(len); 1056 *tl = 0; 1057 } 1058 nfsm_request(vp, NFSPROC_READ, uiop->uio_procp, cred); 1059 if (v3) { 1060 nfsm_postop_attr(vp, attrflag); 1061 if (error) { 1062 m_freem(mrep); 1063 goto nfsmout; 1064 } 1065 nfsm_dissect(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 1066 eof = fxdr_unsigned(int, *(tl + 1)); 1067 } else 1068 nfsm_loadattr(vp, (struct vattr *)0); 1069 nfsm_strsiz(retlen, nmp->nm_rsize); 1070 nfsm_mtouio(uiop, retlen); 1071 m_freem(mrep); 1072 tsiz -= retlen; 1073 if (v3) { 1074 if (eof || retlen == 0) 1075 tsiz = 0; 1076 } else if (retlen < len) 1077 tsiz = 0; 1078 } 1079nfsmout: 1080 return (error); 1081} 1082 1083/* 1084 * nfs write call 1085 */ 1086int 1087nfs_writerpc(vp, uiop, cred, iomode, must_commit) 1088 register struct vnode *vp; 1089 register struct uio *uiop; 1090 struct ucred *cred; 1091 int *iomode, *must_commit; 1092{ 1093 register u_int32_t *tl; 1094 register caddr_t cp; 1095 register int32_t t1, t2, backup; 1096 caddr_t bpos, dpos, cp2; 1097 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 1098 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 1099 int error = 0, len, tsiz, wccflag = NFSV3_WCCRATTR, rlen, commit; 1100 int v3 = NFS_ISV3(vp), committed = NFSV3WRITE_FILESYNC; 1101 1102#ifndef DIAGNOSTIC 1103 if (uiop->uio_iovcnt != 1) 1104 panic("nfs: writerpc iovcnt > 1"); 1105#endif 1106 *must_commit = 0; 1107 tsiz = uiop->uio_resid; 1108 if (uiop->uio_offset + tsiz > nmp->nm_maxfilesize) 1109 return (EFBIG); 1110 while (tsiz > 0) { 1111 nfsstats.rpccnt[NFSPROC_WRITE]++; 1112 len = (tsiz > nmp->nm_wsize) ? nmp->nm_wsize : tsiz; 1113 nfsm_reqhead(vp, NFSPROC_WRITE, 1114 NFSX_FH(v3) + 5 * NFSX_UNSIGNED + nfsm_rndup(len)); 1115 nfsm_fhtom(vp, v3); 1116 if (v3) { 1117 nfsm_build(tl, u_int32_t *, 5 * NFSX_UNSIGNED); 1118 txdr_hyper(&uiop->uio_offset, tl); 1119 tl += 2; 1120 *tl++ = txdr_unsigned(len); 1121 *tl++ = txdr_unsigned(*iomode); 1122 *tl = txdr_unsigned(len); 1123 } else { 1124 register u_int32_t x; 1125 1126 nfsm_build(tl, u_int32_t *, 4 * NFSX_UNSIGNED); 1127 /* Set both "begin" and "current" to non-garbage. */ 1128 x = txdr_unsigned((u_int32_t)uiop->uio_offset); 1129 *tl++ = x; /* "begin offset" */ 1130 *tl++ = x; /* "current offset" */ 1131 x = txdr_unsigned(len); 1132 *tl++ = x; /* total to this offset */ 1133 *tl = x; /* size of this write */ 1134 } 1135 nfsm_uiotom(uiop, len); 1136 nfsm_request(vp, NFSPROC_WRITE, uiop->uio_procp, cred); 1137 if (v3) { 1138 wccflag = NFSV3_WCCCHK; 1139 nfsm_wcc_data(vp, wccflag); 1140 if (!error) { 1141 nfsm_dissect(tl, u_int32_t *, 2 * NFSX_UNSIGNED 1142 + NFSX_V3WRITEVERF); 1143 rlen = fxdr_unsigned(int, *tl++); 1144 if (rlen == 0) { 1145 error = NFSERR_IO; 1146 m_freem(mrep); 1147 break; 1148 } else if (rlen < len) { 1149 backup = len - rlen; 1150 uiop->uio_iov->iov_base -= backup; 1151 uiop->uio_iov->iov_len += backup; 1152 uiop->uio_offset -= backup; 1153 uiop->uio_resid += backup; 1154 len = rlen; 1155 } 1156 commit = fxdr_unsigned(int, *tl++); 1157 1158 /* 1159 * Return the lowest committment level 1160 * obtained by any of the RPCs. 1161 */ 1162 if (committed == NFSV3WRITE_FILESYNC) 1163 committed = commit; 1164 else if (committed == NFSV3WRITE_DATASYNC && 1165 commit == NFSV3WRITE_UNSTABLE) 1166 committed = commit; 1167 if ((nmp->nm_state & NFSSTA_HASWRITEVERF) == 0){ 1168 bcopy((caddr_t)tl, (caddr_t)nmp->nm_verf, 1169 NFSX_V3WRITEVERF); 1170 nmp->nm_state |= NFSSTA_HASWRITEVERF; 1171 } else if (bcmp((caddr_t)tl, 1172 (caddr_t)nmp->nm_verf, NFSX_V3WRITEVERF)) { 1173 *must_commit = 1; 1174 bcopy((caddr_t)tl, (caddr_t)nmp->nm_verf, 1175 NFSX_V3WRITEVERF); 1176 } 1177 } 1178 } else 1179 nfsm_loadattr(vp, (struct vattr *)0); 1180 if (wccflag) 1181 VTONFS(vp)->n_mtime = VTONFS(vp)->n_vattr.va_mtime.tv_sec; 1182 m_freem(mrep); 1183 if (error) 1184 break; 1185 tsiz -= len; 1186 } 1187nfsmout: 1188 if (vp->v_mount->mnt_flag & MNT_ASYNC) 1189 committed = NFSV3WRITE_FILESYNC; 1190 *iomode = committed; 1191 if (error) 1192 uiop->uio_resid = tsiz; 1193 return (error); 1194} 1195 1196/* 1197 * nfs mknod rpc 1198 * For NFS v2 this is a kludge. Use a create rpc but with the IFMT bits of the 1199 * mode set to specify the file type and the size field for rdev. 1200 */ 1201static int 1202nfs_mknodrpc(dvp, vpp, cnp, vap) 1203 register struct vnode *dvp; 1204 register struct vnode **vpp; 1205 register struct componentname *cnp; 1206 register struct vattr *vap; 1207{ 1208 register struct nfsv2_sattr *sp; 1209 register u_int32_t *tl; 1210 register caddr_t cp; 1211 register int32_t t1, t2; 1212 struct vnode *newvp = (struct vnode *)0; 1213 struct nfsnode *np = (struct nfsnode *)0; 1214 struct vattr vattr; 1215 char *cp2; 1216 caddr_t bpos, dpos; 1217 int error = 0, wccflag = NFSV3_WCCRATTR, gotvp = 0; 1218 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 1219 u_int32_t rdev; 1220 int v3 = NFS_ISV3(dvp); 1221 1222 if (vap->va_type == VCHR || vap->va_type == VBLK) 1223 rdev = txdr_unsigned(vap->va_rdev); 1224 else if (vap->va_type == VFIFO || vap->va_type == VSOCK) 1225 rdev = nfs_xdrneg1; 1226 else { 1227 VOP_ABORTOP(dvp, cnp); 1228 return (EOPNOTSUPP); 1229 } 1230 if ((error = VOP_GETATTR(dvp, &vattr, cnp->cn_cred, cnp->cn_proc)) != 0) { 1231 VOP_ABORTOP(dvp, cnp); 1232 return (error); 1233 } 1234 nfsstats.rpccnt[NFSPROC_MKNOD]++; 1235 nfsm_reqhead(dvp, NFSPROC_MKNOD, NFSX_FH(v3) + 4 * NFSX_UNSIGNED + 1236 + nfsm_rndup(cnp->cn_namelen) + NFSX_SATTR(v3)); 1237 nfsm_fhtom(dvp, v3); 1238 nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN); 1239 if (v3) { 1240 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); 1241 *tl++ = vtonfsv3_type(vap->va_type); 1242 nfsm_v3attrbuild(vap, FALSE); 1243 if (vap->va_type == VCHR || vap->va_type == VBLK) { 1244 nfsm_build(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 1245 *tl++ = txdr_unsigned(umajor(vap->va_rdev)); 1246 *tl = txdr_unsigned(uminor(vap->va_rdev)); 1247 } 1248 } else { 1249 nfsm_build(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 1250 sp->sa_mode = vtonfsv2_mode(vap->va_type, vap->va_mode); 1251 sp->sa_uid = nfs_xdrneg1; 1252 sp->sa_gid = nfs_xdrneg1; 1253 sp->sa_size = rdev; 1254 txdr_nfsv2time(&vap->va_atime, &sp->sa_atime); 1255 txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime); 1256 } 1257 nfsm_request(dvp, NFSPROC_MKNOD, cnp->cn_proc, cnp->cn_cred); 1258 if (!error) { 1259 nfsm_mtofh(dvp, newvp, v3, gotvp); 1260 if (!gotvp) { 1261 if (newvp) { 1262 vput(newvp); 1263 newvp = (struct vnode *)0; 1264 } 1265 error = nfs_lookitup(dvp, cnp->cn_nameptr, 1266 cnp->cn_namelen, cnp->cn_cred, cnp->cn_proc, &np); 1267 if (!error) 1268 newvp = NFSTOV(np); 1269 } 1270 } 1271 if (v3) 1272 nfsm_wcc_data(dvp, wccflag); 1273 nfsm_reqdone; 1274 if (error) { 1275 if (newvp) 1276 vput(newvp); 1277 } else { 1278 if (cnp->cn_flags & MAKEENTRY) 1279 cache_enter(dvp, newvp, cnp); 1280 *vpp = newvp; 1281 } 1282 zfree(namei_zone, cnp->cn_pnbuf); 1283 VTONFS(dvp)->n_flag |= NMODIFIED; 1284 if (!wccflag) 1285 VTONFS(dvp)->n_attrstamp = 0; 1286 return (error); 1287} 1288 1289/* 1290 * nfs mknod vop 1291 * just call nfs_mknodrpc() to do the work. 1292 */ 1293/* ARGSUSED */ 1294static int 1295nfs_mknod(ap) 1296 struct vop_mknod_args /* { 1297 struct vnode *a_dvp; 1298 struct vnode **a_vpp; 1299 struct componentname *a_cnp; 1300 struct vattr *a_vap; 1301 } */ *ap; 1302{ 1303 struct vnode *newvp; 1304 int error; 1305 1306 error = nfs_mknodrpc(ap->a_dvp, &newvp, ap->a_cnp, ap->a_vap); 1307 if (!error) 1308 vput(newvp); 1309 return (error); 1310} 1311 1312static u_long create_verf; 1313/* 1314 * nfs file create call 1315 */ 1316static int 1317nfs_create(ap) 1318 struct vop_create_args /* { 1319 struct vnode *a_dvp; 1320 struct vnode **a_vpp; 1321 struct componentname *a_cnp; 1322 struct vattr *a_vap; 1323 } */ *ap; 1324{ 1325 register struct vnode *dvp = ap->a_dvp; 1326 register struct vattr *vap = ap->a_vap; 1327 register struct componentname *cnp = ap->a_cnp; 1328 register struct nfsv2_sattr *sp; 1329 register u_int32_t *tl; 1330 register caddr_t cp; 1331 register int32_t t1, t2; 1332 struct nfsnode *np = (struct nfsnode *)0; 1333 struct vnode *newvp = (struct vnode *)0; 1334 caddr_t bpos, dpos, cp2; 1335 int error = 0, wccflag = NFSV3_WCCRATTR, gotvp = 0, fmode = 0; 1336 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 1337 struct vattr vattr; 1338 int v3 = NFS_ISV3(dvp); 1339 1340 /* 1341 * Oops, not for me.. 1342 */ 1343 if (vap->va_type == VSOCK) 1344 return (nfs_mknodrpc(dvp, ap->a_vpp, cnp, vap)); 1345 1346 if ((error = VOP_GETATTR(dvp, &vattr, cnp->cn_cred, cnp->cn_proc)) != 0) { 1347 VOP_ABORTOP(dvp, cnp); 1348 return (error); 1349 } 1350 if (vap->va_vaflags & VA_EXCLUSIVE) 1351 fmode |= O_EXCL; 1352again: 1353 nfsstats.rpccnt[NFSPROC_CREATE]++; 1354 nfsm_reqhead(dvp, NFSPROC_CREATE, NFSX_FH(v3) + 2 * NFSX_UNSIGNED + 1355 nfsm_rndup(cnp->cn_namelen) + NFSX_SATTR(v3)); 1356 nfsm_fhtom(dvp, v3); 1357 nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN); 1358 if (v3) { 1359 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); 1360 if (fmode & O_EXCL) { 1361 *tl = txdr_unsigned(NFSV3CREATE_EXCLUSIVE); 1362 nfsm_build(tl, u_int32_t *, NFSX_V3CREATEVERF); 1363#ifdef INET 1364 if (!TAILQ_EMPTY(&in_ifaddrhead)) 1365 *tl++ = IA_SIN(in_ifaddrhead.tqh_first)->sin_addr.s_addr; 1366 else 1367#endif 1368 *tl++ = create_verf; 1369 *tl = ++create_verf; 1370 } else { 1371 *tl = txdr_unsigned(NFSV3CREATE_UNCHECKED); 1372 nfsm_v3attrbuild(vap, FALSE); 1373 } 1374 } else { 1375 nfsm_build(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 1376 sp->sa_mode = vtonfsv2_mode(vap->va_type, vap->va_mode); 1377 sp->sa_uid = nfs_xdrneg1; 1378 sp->sa_gid = nfs_xdrneg1; 1379 sp->sa_size = 0; 1380 txdr_nfsv2time(&vap->va_atime, &sp->sa_atime); 1381 txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime); 1382 } 1383 nfsm_request(dvp, NFSPROC_CREATE, cnp->cn_proc, cnp->cn_cred); 1384 if (!error) { 1385 nfsm_mtofh(dvp, newvp, v3, gotvp); 1386 if (!gotvp) { 1387 if (newvp) { 1388 vput(newvp); 1389 newvp = (struct vnode *)0; 1390 } 1391 error = nfs_lookitup(dvp, cnp->cn_nameptr, 1392 cnp->cn_namelen, cnp->cn_cred, cnp->cn_proc, &np); 1393 if (!error) 1394 newvp = NFSTOV(np); 1395 } 1396 } 1397 if (v3) 1398 nfsm_wcc_data(dvp, wccflag); 1399 nfsm_reqdone; 1400 if (error) { 1401 if (v3 && (fmode & O_EXCL) && error == NFSERR_NOTSUPP) { 1402 fmode &= ~O_EXCL; 1403 goto again; 1404 } 1405 if (newvp) 1406 vput(newvp); 1407 } else if (v3 && (fmode & O_EXCL)) 1408 error = nfs_setattrrpc(newvp, vap, cnp->cn_cred, cnp->cn_proc); 1409 if (!error) { 1410 if (cnp->cn_flags & MAKEENTRY) 1411 cache_enter(dvp, newvp, cnp); 1412 *ap->a_vpp = newvp; 1413 } 1414 if (error || (cnp->cn_flags & SAVESTART) == 0) 1415 zfree(namei_zone, cnp->cn_pnbuf); 1416 VTONFS(dvp)->n_flag |= NMODIFIED; 1417 if (!wccflag) 1418 VTONFS(dvp)->n_attrstamp = 0; 1419 return (error); 1420} 1421 1422/* 1423 * nfs file remove call 1424 * To try and make nfs semantics closer to ufs semantics, a file that has 1425 * other processes using the vnode is renamed instead of removed and then 1426 * removed later on the last close. 1427 * - If v_usecount > 1 1428 * If a rename is not already in the works 1429 * call nfs_sillyrename() to set it up 1430 * else 1431 * do the remove rpc 1432 */ 1433static int 1434nfs_remove(ap) 1435 struct vop_remove_args /* { 1436 struct vnodeop_desc *a_desc; 1437 struct vnode * a_dvp; 1438 struct vnode * a_vp; 1439 struct componentname * a_cnp; 1440 } */ *ap; 1441{ 1442 register struct vnode *vp = ap->a_vp; 1443 register struct vnode *dvp = ap->a_dvp; 1444 register struct componentname *cnp = ap->a_cnp; 1445 register struct nfsnode *np = VTONFS(vp); 1446 int error = 0; 1447 struct vattr vattr; 1448 1449#ifndef DIAGNOSTIC 1450 if ((cnp->cn_flags & HASBUF) == 0) 1451 panic("nfs_remove: no name"); 1452 if (vp->v_usecount < 1) 1453 panic("nfs_remove: bad v_usecount"); 1454#endif 1455 if (vp->v_type == VDIR) 1456 error = EPERM; 1457 else if (vp->v_usecount == 1 || (np->n_sillyrename && 1458 VOP_GETATTR(vp, &vattr, cnp->cn_cred, cnp->cn_proc) == 0 && 1459 vattr.va_nlink > 1)) { 1460 /* 1461 * Purge the name cache so that the chance of a lookup for 1462 * the name succeeding while the remove is in progress is 1463 * minimized. Without node locking it can still happen, such 1464 * that an I/O op returns ESTALE, but since you get this if 1465 * another host removes the file.. 1466 */ 1467 cache_purge(vp); 1468 /* 1469 * throw away biocache buffers, mainly to avoid 1470 * unnecessary delayed writes later. 1471 */ 1472 error = nfs_vinvalbuf(vp, 0, cnp->cn_cred, cnp->cn_proc, 1); 1473 /* Do the rpc */ 1474 if (error != EINTR) 1475 error = nfs_removerpc(dvp, cnp->cn_nameptr, 1476 cnp->cn_namelen, cnp->cn_cred, cnp->cn_proc); 1477 /* 1478 * Kludge City: If the first reply to the remove rpc is lost.. 1479 * the reply to the retransmitted request will be ENOENT 1480 * since the file was in fact removed 1481 * Therefore, we cheat and return success. 1482 */ 1483 if (error == ENOENT) 1484 error = 0; 1485 } else if (!np->n_sillyrename) 1486 error = nfs_sillyrename(dvp, vp, cnp); 1487 zfree(namei_zone, cnp->cn_pnbuf); 1488 np->n_attrstamp = 0; 1489 return (error); 1490} 1491 1492/* 1493 * nfs file remove rpc called from nfs_inactive 1494 */ 1495int 1496nfs_removeit(sp) 1497 register struct sillyrename *sp; 1498{ 1499 1500 return (nfs_removerpc(sp->s_dvp, sp->s_name, sp->s_namlen, sp->s_cred, 1501 (struct proc *)0)); 1502} 1503 1504/* 1505 * Nfs remove rpc, called from nfs_remove() and nfs_removeit(). 1506 */ 1507static int 1508nfs_removerpc(dvp, name, namelen, cred, proc) 1509 register struct vnode *dvp; 1510 const char *name; 1511 int namelen; 1512 struct ucred *cred; 1513 struct proc *proc; 1514{ 1515 register u_int32_t *tl; 1516 register caddr_t cp; 1517 register int32_t t1, t2; 1518 caddr_t bpos, dpos, cp2; 1519 int error = 0, wccflag = NFSV3_WCCRATTR; 1520 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 1521 int v3 = NFS_ISV3(dvp); 1522 1523 nfsstats.rpccnt[NFSPROC_REMOVE]++; 1524 nfsm_reqhead(dvp, NFSPROC_REMOVE, 1525 NFSX_FH(v3) + NFSX_UNSIGNED + nfsm_rndup(namelen)); 1526 nfsm_fhtom(dvp, v3); 1527 nfsm_strtom(name, namelen, NFS_MAXNAMLEN); 1528 nfsm_request(dvp, NFSPROC_REMOVE, proc, cred); 1529 if (v3) 1530 nfsm_wcc_data(dvp, wccflag); 1531 nfsm_reqdone; 1532 VTONFS(dvp)->n_flag |= NMODIFIED; 1533 if (!wccflag) 1534 VTONFS(dvp)->n_attrstamp = 0; 1535 return (error); 1536} 1537 1538/* 1539 * nfs file rename call 1540 */ 1541static int 1542nfs_rename(ap) 1543 struct vop_rename_args /* { 1544 struct vnode *a_fdvp; 1545 struct vnode *a_fvp; 1546 struct componentname *a_fcnp; 1547 struct vnode *a_tdvp; 1548 struct vnode *a_tvp; 1549 struct componentname *a_tcnp; 1550 } */ *ap; 1551{ 1552 register struct vnode *fvp = ap->a_fvp; 1553 register struct vnode *tvp = ap->a_tvp; 1554 register struct vnode *fdvp = ap->a_fdvp; 1555 register struct vnode *tdvp = ap->a_tdvp; 1556 register struct componentname *tcnp = ap->a_tcnp; 1557 register struct componentname *fcnp = ap->a_fcnp; 1558 int error; 1559 1560#ifndef DIAGNOSTIC 1561 if ((tcnp->cn_flags & HASBUF) == 0 || 1562 (fcnp->cn_flags & HASBUF) == 0) 1563 panic("nfs_rename: no name"); 1564#endif 1565 /* Check for cross-device rename */ 1566 if ((fvp->v_mount != tdvp->v_mount) || 1567 (tvp && (fvp->v_mount != tvp->v_mount))) { 1568 error = EXDEV; 1569 goto out; 1570 } 1571 1572 /* 1573 * We have to flush B_DELWRI data prior to renaming 1574 * the file. If we don't, the delayed-write buffers 1575 * can be flushed out later after the file has gone stale 1576 * under NFSV3. NFSV2 does not have this problem because 1577 * ( as far as I can tell ) it flushes dirty buffers more 1578 * often. 1579 */ 1580 1581 VOP_FSYNC(fvp, fcnp->cn_cred, MNT_WAIT, fcnp->cn_proc); 1582 if (tvp) 1583 VOP_FSYNC(tvp, tcnp->cn_cred, MNT_WAIT, tcnp->cn_proc); 1584 1585 /* 1586 * If the tvp exists and is in use, sillyrename it before doing the 1587 * rename of the new file over it. 1588 * XXX Can't sillyrename a directory. 1589 */ 1590 if (tvp && tvp->v_usecount > 1 && !VTONFS(tvp)->n_sillyrename && 1591 tvp->v_type != VDIR && !nfs_sillyrename(tdvp, tvp, tcnp)) { 1592 vput(tvp); 1593 tvp = NULL; 1594 } 1595 1596 error = nfs_renamerpc(fdvp, fcnp->cn_nameptr, fcnp->cn_namelen, 1597 tdvp, tcnp->cn_nameptr, tcnp->cn_namelen, tcnp->cn_cred, 1598 tcnp->cn_proc); 1599 1600 if (fvp->v_type == VDIR) { 1601 if (tvp != NULL && tvp->v_type == VDIR) 1602 cache_purge(tdvp); 1603 cache_purge(fdvp); 1604 } 1605 1606out: 1607 VOP_ABORTOP(tdvp, tcnp); 1608 if (tdvp == tvp) 1609 vrele(tdvp); 1610 else 1611 vput(tdvp); 1612 if (tvp) 1613 vput(tvp); 1614 VOP_ABORTOP(fdvp, fcnp); 1615 vrele(fdvp); 1616 vrele(fvp); 1617 /* 1618 * Kludge: Map ENOENT => 0 assuming that it is a reply to a retry. 1619 */ 1620 if (error == ENOENT) 1621 error = 0; 1622 return (error); 1623} 1624 1625/* 1626 * nfs file rename rpc called from nfs_remove() above 1627 */ 1628static int 1629nfs_renameit(sdvp, scnp, sp) 1630 struct vnode *sdvp; 1631 struct componentname *scnp; 1632 register struct sillyrename *sp; 1633{ 1634 return (nfs_renamerpc(sdvp, scnp->cn_nameptr, scnp->cn_namelen, 1635 sdvp, sp->s_name, sp->s_namlen, scnp->cn_cred, scnp->cn_proc)); 1636} 1637 1638/* 1639 * Do an nfs rename rpc. Called from nfs_rename() and nfs_renameit(). 1640 */ 1641static int 1642nfs_renamerpc(fdvp, fnameptr, fnamelen, tdvp, tnameptr, tnamelen, cred, proc) 1643 register struct vnode *fdvp; 1644 const char *fnameptr; 1645 int fnamelen; 1646 register struct vnode *tdvp; 1647 const char *tnameptr; 1648 int tnamelen; 1649 struct ucred *cred; 1650 struct proc *proc; 1651{ 1652 register u_int32_t *tl; 1653 register caddr_t cp; 1654 register int32_t t1, t2; 1655 caddr_t bpos, dpos, cp2; 1656 int error = 0, fwccflag = NFSV3_WCCRATTR, twccflag = NFSV3_WCCRATTR; 1657 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 1658 int v3 = NFS_ISV3(fdvp); 1659 1660 nfsstats.rpccnt[NFSPROC_RENAME]++; 1661 nfsm_reqhead(fdvp, NFSPROC_RENAME, 1662 (NFSX_FH(v3) + NFSX_UNSIGNED)*2 + nfsm_rndup(fnamelen) + 1663 nfsm_rndup(tnamelen)); 1664 nfsm_fhtom(fdvp, v3); 1665 nfsm_strtom(fnameptr, fnamelen, NFS_MAXNAMLEN); 1666 nfsm_fhtom(tdvp, v3); 1667 nfsm_strtom(tnameptr, tnamelen, NFS_MAXNAMLEN); 1668 nfsm_request(fdvp, NFSPROC_RENAME, proc, cred); 1669 if (v3) { 1670 nfsm_wcc_data(fdvp, fwccflag); 1671 nfsm_wcc_data(tdvp, twccflag); 1672 } 1673 nfsm_reqdone; 1674 VTONFS(fdvp)->n_flag |= NMODIFIED; 1675 VTONFS(tdvp)->n_flag |= NMODIFIED; 1676 if (!fwccflag) 1677 VTONFS(fdvp)->n_attrstamp = 0; 1678 if (!twccflag) 1679 VTONFS(tdvp)->n_attrstamp = 0; 1680 return (error); 1681} 1682 1683/* 1684 * nfs hard link create call 1685 */ 1686static int 1687nfs_link(ap) 1688 struct vop_link_args /* { 1689 struct vnode *a_tdvp; 1690 struct vnode *a_vp; 1691 struct componentname *a_cnp; 1692 } */ *ap; 1693{ 1694 register struct vnode *vp = ap->a_vp; 1695 register struct vnode *tdvp = ap->a_tdvp; 1696 register struct componentname *cnp = ap->a_cnp; 1697 register u_int32_t *tl; 1698 register caddr_t cp; 1699 register int32_t t1, t2; 1700 caddr_t bpos, dpos, cp2; 1701 int error = 0, wccflag = NFSV3_WCCRATTR, attrflag = 0; 1702 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 1703 int v3; 1704 1705 if (vp->v_mount != tdvp->v_mount) { 1706 VOP_ABORTOP(tdvp, cnp); 1707 return (EXDEV); 1708 } 1709 1710 /* 1711 * Push all writes to the server, so that the attribute cache 1712 * doesn't get "out of sync" with the server. 1713 * XXX There should be a better way! 1714 */ 1715 VOP_FSYNC(vp, cnp->cn_cred, MNT_WAIT, cnp->cn_proc); 1716 1717 v3 = NFS_ISV3(vp); 1718 nfsstats.rpccnt[NFSPROC_LINK]++; 1719 nfsm_reqhead(vp, NFSPROC_LINK, 1720 NFSX_FH(v3)*2 + NFSX_UNSIGNED + nfsm_rndup(cnp->cn_namelen)); 1721 nfsm_fhtom(vp, v3); 1722 nfsm_fhtom(tdvp, v3); 1723 nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN); 1724 nfsm_request(vp, NFSPROC_LINK, cnp->cn_proc, cnp->cn_cred); 1725 if (v3) { 1726 nfsm_postop_attr(vp, attrflag); 1727 nfsm_wcc_data(tdvp, wccflag); 1728 } 1729 nfsm_reqdone; 1730 zfree(namei_zone, cnp->cn_pnbuf); 1731 VTONFS(tdvp)->n_flag |= NMODIFIED; 1732 if (!attrflag) 1733 VTONFS(vp)->n_attrstamp = 0; 1734 if (!wccflag) 1735 VTONFS(tdvp)->n_attrstamp = 0; 1736 /* 1737 * Kludge: Map EEXIST => 0 assuming that it is a reply to a retry. 1738 */ 1739 if (error == EEXIST) 1740 error = 0; 1741 return (error); 1742} 1743 1744/* 1745 * nfs symbolic link create call 1746 */ 1747static int 1748nfs_symlink(ap) 1749 struct vop_symlink_args /* { 1750 struct vnode *a_dvp; 1751 struct vnode **a_vpp; 1752 struct componentname *a_cnp; 1753 struct vattr *a_vap; 1754 char *a_target; 1755 } */ *ap; 1756{ 1757 register struct vnode *dvp = ap->a_dvp; 1758 register struct vattr *vap = ap->a_vap; 1759 register struct componentname *cnp = ap->a_cnp; 1760 register struct nfsv2_sattr *sp; 1761 register u_int32_t *tl; 1762 register caddr_t cp; 1763 register int32_t t1, t2; 1764 caddr_t bpos, dpos, cp2; 1765 int slen, error = 0, wccflag = NFSV3_WCCRATTR, gotvp; 1766 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 1767 struct vnode *newvp = (struct vnode *)0; 1768 int v3 = NFS_ISV3(dvp); 1769 1770 nfsstats.rpccnt[NFSPROC_SYMLINK]++; 1771 slen = strlen(ap->a_target); 1772 nfsm_reqhead(dvp, NFSPROC_SYMLINK, NFSX_FH(v3) + 2*NFSX_UNSIGNED + 1773 nfsm_rndup(cnp->cn_namelen) + nfsm_rndup(slen) + NFSX_SATTR(v3)); 1774 nfsm_fhtom(dvp, v3); 1775 nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN); 1776 if (v3) { 1777 nfsm_v3attrbuild(vap, FALSE); 1778 } 1779 nfsm_strtom(ap->a_target, slen, NFS_MAXPATHLEN); 1780 if (!v3) { 1781 nfsm_build(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 1782 sp->sa_mode = vtonfsv2_mode(VLNK, vap->va_mode); 1783 sp->sa_uid = nfs_xdrneg1; 1784 sp->sa_gid = nfs_xdrneg1; 1785 sp->sa_size = nfs_xdrneg1; 1786 txdr_nfsv2time(&vap->va_atime, &sp->sa_atime); 1787 txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime); 1788 } 1789 nfsm_request(dvp, NFSPROC_SYMLINK, cnp->cn_proc, cnp->cn_cred); 1790 if (v3) { 1791 if (!error) 1792 nfsm_mtofh(dvp, newvp, v3, gotvp); 1793 nfsm_wcc_data(dvp, wccflag); 1794 } 1795 nfsm_reqdone; 1796 if (newvp) 1797 vput(newvp); 1798 VTONFS(dvp)->n_flag |= NMODIFIED; 1799 if (!wccflag) 1800 VTONFS(dvp)->n_attrstamp = 0; 1801 /* 1802 * Kludge: Map EEXIST => 0 assuming that it is a reply to a retry. 1803 */ 1804 if (error == EEXIST) 1805 error = 0; 1806 /* 1807 * cnp's buffer expected to be freed if SAVESTART not set or 1808 * if an error was returned. 1809 */ 1810 if (error || (cnp->cn_flags & SAVESTART) == 0) 1811 zfree(namei_zone, cnp->cn_pnbuf); 1812 return (error); 1813} 1814 1815/* 1816 * nfs make dir call 1817 */ 1818static int 1819nfs_mkdir(ap) 1820 struct vop_mkdir_args /* { 1821 struct vnode *a_dvp; 1822 struct vnode **a_vpp; 1823 struct componentname *a_cnp; 1824 struct vattr *a_vap; 1825 } */ *ap; 1826{ 1827 register struct vnode *dvp = ap->a_dvp; 1828 register struct vattr *vap = ap->a_vap; 1829 register struct componentname *cnp = ap->a_cnp; 1830 register struct nfsv2_sattr *sp; 1831 register u_int32_t *tl; 1832 register caddr_t cp; 1833 register int32_t t1, t2; 1834 register int len; 1835 struct nfsnode *np = (struct nfsnode *)0; 1836 struct vnode *newvp = (struct vnode *)0; 1837 caddr_t bpos, dpos, cp2; 1838 int error = 0, wccflag = NFSV3_WCCRATTR; 1839 int gotvp = 0; 1840 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 1841 struct vattr vattr; 1842 int v3 = NFS_ISV3(dvp); 1843 1844 if ((error = VOP_GETATTR(dvp, &vattr, cnp->cn_cred, cnp->cn_proc)) != 0) { 1845 VOP_ABORTOP(dvp, cnp); 1846 return (error); 1847 } 1848 len = cnp->cn_namelen; 1849 nfsstats.rpccnt[NFSPROC_MKDIR]++; 1850 nfsm_reqhead(dvp, NFSPROC_MKDIR, 1851 NFSX_FH(v3) + NFSX_UNSIGNED + nfsm_rndup(len) + NFSX_SATTR(v3)); 1852 nfsm_fhtom(dvp, v3); 1853 nfsm_strtom(cnp->cn_nameptr, len, NFS_MAXNAMLEN); 1854 if (v3) { 1855 nfsm_v3attrbuild(vap, FALSE); 1856 } else { 1857 nfsm_build(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 1858 sp->sa_mode = vtonfsv2_mode(VDIR, vap->va_mode); 1859 sp->sa_uid = nfs_xdrneg1; 1860 sp->sa_gid = nfs_xdrneg1; 1861 sp->sa_size = nfs_xdrneg1; 1862 txdr_nfsv2time(&vap->va_atime, &sp->sa_atime); 1863 txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime); 1864 } 1865 nfsm_request(dvp, NFSPROC_MKDIR, cnp->cn_proc, cnp->cn_cred); 1866 if (!error) 1867 nfsm_mtofh(dvp, newvp, v3, gotvp); 1868 if (v3) 1869 nfsm_wcc_data(dvp, wccflag); 1870 nfsm_reqdone; 1871 VTONFS(dvp)->n_flag |= NMODIFIED; 1872 if (!wccflag) 1873 VTONFS(dvp)->n_attrstamp = 0; 1874 /* 1875 * Kludge: Map EEXIST => 0 assuming that you have a reply to a retry 1876 * if we can succeed in looking up the directory. 1877 */ 1878 if (error == EEXIST || (!error && !gotvp)) { 1879 if (newvp) { 1880 vrele(newvp); 1881 newvp = (struct vnode *)0; 1882 } 1883 error = nfs_lookitup(dvp, cnp->cn_nameptr, len, cnp->cn_cred, 1884 cnp->cn_proc, &np); 1885 if (!error) { 1886 newvp = NFSTOV(np); 1887 if (newvp->v_type != VDIR) 1888 error = EEXIST; 1889 } 1890 } 1891 if (error) { 1892 if (newvp) 1893 vrele(newvp); 1894 } else 1895 *ap->a_vpp = newvp; 1896 if (error || (cnp->cn_flags & SAVESTART) == 0) 1897 zfree(namei_zone, cnp->cn_pnbuf); 1898 return (error); 1899} 1900 1901/* 1902 * nfs remove directory call 1903 */ 1904static int 1905nfs_rmdir(ap) 1906 struct vop_rmdir_args /* { 1907 struct vnode *a_dvp; 1908 struct vnode *a_vp; 1909 struct componentname *a_cnp; 1910 } */ *ap; 1911{ 1912 register struct vnode *vp = ap->a_vp; 1913 register struct vnode *dvp = ap->a_dvp; 1914 register struct componentname *cnp = ap->a_cnp; 1915 register u_int32_t *tl; 1916 register caddr_t cp; 1917 register int32_t t1, t2; 1918 caddr_t bpos, dpos, cp2; 1919 int error = 0, wccflag = NFSV3_WCCRATTR; 1920 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 1921 int v3 = NFS_ISV3(dvp); 1922 1923 if (dvp == vp) 1924 return (EINVAL); 1925 nfsstats.rpccnt[NFSPROC_RMDIR]++; 1926 nfsm_reqhead(dvp, NFSPROC_RMDIR, 1927 NFSX_FH(v3) + NFSX_UNSIGNED + nfsm_rndup(cnp->cn_namelen)); 1928 nfsm_fhtom(dvp, v3); 1929 nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN); 1930 nfsm_request(dvp, NFSPROC_RMDIR, cnp->cn_proc, cnp->cn_cred); 1931 if (v3) 1932 nfsm_wcc_data(dvp, wccflag); 1933 nfsm_reqdone; 1934 zfree(namei_zone, cnp->cn_pnbuf); 1935 VTONFS(dvp)->n_flag |= NMODIFIED; 1936 if (!wccflag) 1937 VTONFS(dvp)->n_attrstamp = 0; 1938 cache_purge(dvp); 1939 cache_purge(vp); 1940 /* 1941 * Kludge: Map ENOENT => 0 assuming that you have a reply to a retry. 1942 */ 1943 if (error == ENOENT) 1944 error = 0; 1945 return (error); 1946} 1947 1948/* 1949 * nfs readdir call 1950 */ 1951static int 1952nfs_readdir(ap) 1953 struct vop_readdir_args /* { 1954 struct vnode *a_vp; 1955 struct uio *a_uio; 1956 struct ucred *a_cred; 1957 } */ *ap; 1958{ 1959 register struct vnode *vp = ap->a_vp; 1960 register struct nfsnode *np = VTONFS(vp); 1961 register struct uio *uio = ap->a_uio; 1962 int tresid, error; 1963 struct vattr vattr; 1964 1965 if (vp->v_type != VDIR) 1966 return (EPERM); 1967 /* 1968 * First, check for hit on the EOF offset cache 1969 */ 1970 if (np->n_direofoffset > 0 && uio->uio_offset >= np->n_direofoffset && 1971 (np->n_flag & NMODIFIED) == 0) { 1972 if (VFSTONFS(vp->v_mount)->nm_flag & NFSMNT_NQNFS) { 1973 if (NQNFS_CKCACHABLE(vp, ND_READ)) { 1974 nfsstats.direofcache_hits++; 1975 return (0); 1976 } 1977 } else if (VOP_GETATTR(vp, &vattr, ap->a_cred, uio->uio_procp) == 0 && 1978 np->n_mtime == vattr.va_mtime.tv_sec) { 1979 nfsstats.direofcache_hits++; 1980 return (0); 1981 } 1982 } 1983 1984 /* 1985 * Call nfs_bioread() to do the real work. 1986 */ 1987 tresid = uio->uio_resid; 1988 error = nfs_bioread(vp, uio, 0, ap->a_cred); 1989 1990 if (!error && uio->uio_resid == tresid) 1991 nfsstats.direofcache_misses++; 1992 return (error); 1993} 1994 1995/* 1996 * Readdir rpc call. 1997 * Called from below the buffer cache by nfs_doio(). 1998 */ 1999int 2000nfs_readdirrpc(vp, uiop, cred) 2001 struct vnode *vp; 2002 register struct uio *uiop; 2003 struct ucred *cred; 2004 2005{ 2006 register int len, left; 2007 register struct dirent *dp = NULL; 2008 register u_int32_t *tl; 2009 register caddr_t cp; 2010 register int32_t t1, t2; 2011 register nfsuint64 *cookiep; 2012 caddr_t bpos, dpos, cp2; 2013 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 2014 nfsuint64 cookie; 2015 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 2016 struct nfsnode *dnp = VTONFS(vp); 2017 u_quad_t fileno; 2018 int error = 0, tlen, more_dirs = 1, blksiz = 0, bigenough = 1; 2019 int attrflag; 2020 int v3 = NFS_ISV3(vp); 2021 2022#ifndef DIAGNOSTIC 2023 if (uiop->uio_iovcnt != 1 || (uiop->uio_offset & (DIRBLKSIZ - 1)) || 2024 (uiop->uio_resid & (DIRBLKSIZ - 1))) 2025 panic("nfs readdirrpc bad uio"); 2026#endif 2027 2028 /* 2029 * If there is no cookie, assume directory was stale. 2030 */ 2031 cookiep = nfs_getcookie(dnp, uiop->uio_offset, 0); 2032 if (cookiep) 2033 cookie = *cookiep; 2034 else 2035 return (NFSERR_BAD_COOKIE); 2036 /* 2037 * Loop around doing readdir rpc's of size nm_readdirsize 2038 * truncated to a multiple of DIRBLKSIZ. 2039 * The stopping criteria is EOF or buffer full. 2040 */ 2041 while (more_dirs && bigenough) { 2042 nfsstats.rpccnt[NFSPROC_READDIR]++; 2043 nfsm_reqhead(vp, NFSPROC_READDIR, NFSX_FH(v3) + 2044 NFSX_READDIR(v3)); 2045 nfsm_fhtom(vp, v3); 2046 if (v3) { 2047 nfsm_build(tl, u_int32_t *, 5 * NFSX_UNSIGNED); 2048 *tl++ = cookie.nfsuquad[0]; 2049 *tl++ = cookie.nfsuquad[1]; 2050 *tl++ = dnp->n_cookieverf.nfsuquad[0]; 2051 *tl++ = dnp->n_cookieverf.nfsuquad[1]; 2052 } else { 2053 nfsm_build(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 2054 *tl++ = cookie.nfsuquad[0]; 2055 } 2056 *tl = txdr_unsigned(nmp->nm_readdirsize); 2057 nfsm_request(vp, NFSPROC_READDIR, uiop->uio_procp, cred); 2058 if (v3) { 2059 nfsm_postop_attr(vp, attrflag); 2060 if (!error) { 2061 nfsm_dissect(tl, u_int32_t *, 2062 2 * NFSX_UNSIGNED); 2063 dnp->n_cookieverf.nfsuquad[0] = *tl++; 2064 dnp->n_cookieverf.nfsuquad[1] = *tl; 2065 } else { 2066 m_freem(mrep); 2067 goto nfsmout; 2068 } 2069 } 2070 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 2071 more_dirs = fxdr_unsigned(int, *tl); 2072 2073 /* loop thru the dir entries, doctoring them to 4bsd form */ 2074 while (more_dirs && bigenough) { 2075 if (v3) { 2076 nfsm_dissect(tl, u_int32_t *, 2077 3 * NFSX_UNSIGNED); 2078 fxdr_hyper(tl, &fileno); 2079 len = fxdr_unsigned(int, *(tl + 2)); 2080 } else { 2081 nfsm_dissect(tl, u_int32_t *, 2082 2 * NFSX_UNSIGNED); 2083 fileno = fxdr_unsigned(u_quad_t, *tl++); 2084 len = fxdr_unsigned(int, *tl); 2085 } 2086 if (len <= 0 || len > NFS_MAXNAMLEN) { 2087 error = EBADRPC; 2088 m_freem(mrep); 2089 goto nfsmout; 2090 } 2091 tlen = nfsm_rndup(len); 2092 if (tlen == len) 2093 tlen += 4; /* To ensure null termination */ 2094 left = DIRBLKSIZ - blksiz; 2095 if ((tlen + DIRHDSIZ) > left) { 2096 dp->d_reclen += left; 2097 uiop->uio_iov->iov_base += left; 2098 uiop->uio_iov->iov_len -= left; 2099 uiop->uio_offset += left; 2100 uiop->uio_resid -= left; 2101 blksiz = 0; 2102 } 2103 if ((tlen + DIRHDSIZ) > uiop->uio_resid) 2104 bigenough = 0; 2105 if (bigenough) { 2106 dp = (struct dirent *)uiop->uio_iov->iov_base; 2107 dp->d_fileno = (int)fileno; 2108 dp->d_namlen = len; 2109 dp->d_reclen = tlen + DIRHDSIZ; 2110 dp->d_type = DT_UNKNOWN; 2111 blksiz += dp->d_reclen; 2112 if (blksiz == DIRBLKSIZ) 2113 blksiz = 0; 2114 uiop->uio_offset += DIRHDSIZ; 2115 uiop->uio_resid -= DIRHDSIZ; 2116 uiop->uio_iov->iov_base += DIRHDSIZ; 2117 uiop->uio_iov->iov_len -= DIRHDSIZ; 2118 nfsm_mtouio(uiop, len); 2119 cp = uiop->uio_iov->iov_base; 2120 tlen -= len; 2121 *cp = '\0'; /* null terminate */ 2122 uiop->uio_iov->iov_base += tlen; 2123 uiop->uio_iov->iov_len -= tlen; 2124 uiop->uio_offset += tlen; 2125 uiop->uio_resid -= tlen; 2126 } else 2127 nfsm_adv(nfsm_rndup(len)); 2128 if (v3) { 2129 nfsm_dissect(tl, u_int32_t *, 2130 3 * NFSX_UNSIGNED); 2131 } else { 2132 nfsm_dissect(tl, u_int32_t *, 2133 2 * NFSX_UNSIGNED); 2134 } 2135 if (bigenough) { 2136 cookie.nfsuquad[0] = *tl++; 2137 if (v3) 2138 cookie.nfsuquad[1] = *tl++; 2139 } else if (v3) 2140 tl += 2; 2141 else 2142 tl++; 2143 more_dirs = fxdr_unsigned(int, *tl); 2144 } 2145 /* 2146 * If at end of rpc data, get the eof boolean 2147 */ 2148 if (!more_dirs) { 2149 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 2150 more_dirs = (fxdr_unsigned(int, *tl) == 0); 2151 } 2152 m_freem(mrep); 2153 } 2154 /* 2155 * Fill last record, iff any, out to a multiple of DIRBLKSIZ 2156 * by increasing d_reclen for the last record. 2157 */ 2158 if (blksiz > 0) { 2159 left = DIRBLKSIZ - blksiz; 2160 dp->d_reclen += left; 2161 uiop->uio_iov->iov_base += left; 2162 uiop->uio_iov->iov_len -= left; 2163 uiop->uio_offset += left; 2164 uiop->uio_resid -= left; 2165 } 2166 2167 /* 2168 * We are now either at the end of the directory or have filled the 2169 * block. 2170 */ 2171 if (bigenough) 2172 dnp->n_direofoffset = uiop->uio_offset; 2173 else { 2174 if (uiop->uio_resid > 0) 2175 printf("EEK! readdirrpc resid > 0\n"); 2176 cookiep = nfs_getcookie(dnp, uiop->uio_offset, 1); 2177 *cookiep = cookie; 2178 } 2179nfsmout: 2180 return (error); 2181} 2182 2183/* 2184 * NFS V3 readdir plus RPC. Used in place of nfs_readdirrpc(). 2185 */ 2186int 2187nfs_readdirplusrpc(vp, uiop, cred) 2188 struct vnode *vp; 2189 register struct uio *uiop; 2190 struct ucred *cred; 2191{ 2192 register int len, left; 2193 register struct dirent *dp; 2194 register u_int32_t *tl; 2195 register caddr_t cp; 2196 register int32_t t1, t2; 2197 register struct vnode *newvp; 2198 register nfsuint64 *cookiep; 2199 caddr_t bpos, dpos, cp2, dpossav1, dpossav2; 2200 struct mbuf *mreq, *mrep, *md, *mb, *mb2, *mdsav1, *mdsav2; 2201 struct nameidata nami, *ndp = &nami; 2202 struct componentname *cnp = &ndp->ni_cnd; 2203 nfsuint64 cookie; 2204 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 2205 struct nfsnode *dnp = VTONFS(vp), *np; 2206 nfsfh_t *fhp; 2207 u_quad_t fileno; 2208 int error = 0, tlen, more_dirs = 1, blksiz = 0, doit, bigenough = 1, i; 2209 int attrflag, fhsize; 2210 2211#ifndef nolint 2212 dp = (struct dirent *)0; 2213#endif 2214#ifndef DIAGNOSTIC 2215 if (uiop->uio_iovcnt != 1 || (uiop->uio_offset & (DIRBLKSIZ - 1)) || 2216 (uiop->uio_resid & (DIRBLKSIZ - 1))) 2217 panic("nfs readdirplusrpc bad uio"); 2218#endif 2219 ndp->ni_dvp = vp; 2220 newvp = NULLVP; 2221 2222 /* 2223 * If there is no cookie, assume directory was stale. 2224 */ 2225 cookiep = nfs_getcookie(dnp, uiop->uio_offset, 0); 2226 if (cookiep) 2227 cookie = *cookiep; 2228 else 2229 return (NFSERR_BAD_COOKIE); 2230 /* 2231 * Loop around doing readdir rpc's of size nm_readdirsize 2232 * truncated to a multiple of DIRBLKSIZ. 2233 * The stopping criteria is EOF or buffer full. 2234 */ 2235 while (more_dirs && bigenough) { 2236 nfsstats.rpccnt[NFSPROC_READDIRPLUS]++; 2237 nfsm_reqhead(vp, NFSPROC_READDIRPLUS, 2238 NFSX_FH(1) + 6 * NFSX_UNSIGNED); 2239 nfsm_fhtom(vp, 1); 2240 nfsm_build(tl, u_int32_t *, 6 * NFSX_UNSIGNED); 2241 *tl++ = cookie.nfsuquad[0]; 2242 *tl++ = cookie.nfsuquad[1]; 2243 *tl++ = dnp->n_cookieverf.nfsuquad[0]; 2244 *tl++ = dnp->n_cookieverf.nfsuquad[1]; 2245 *tl++ = txdr_unsigned(nmp->nm_readdirsize); 2246 *tl = txdr_unsigned(nmp->nm_rsize); 2247 nfsm_request(vp, NFSPROC_READDIRPLUS, uiop->uio_procp, cred); 2248 nfsm_postop_attr(vp, attrflag); 2249 if (error) { 2250 m_freem(mrep); 2251 goto nfsmout; 2252 } 2253 nfsm_dissect(tl, u_int32_t *, 3 * NFSX_UNSIGNED); 2254 dnp->n_cookieverf.nfsuquad[0] = *tl++; 2255 dnp->n_cookieverf.nfsuquad[1] = *tl++; 2256 more_dirs = fxdr_unsigned(int, *tl); 2257 2258 /* loop thru the dir entries, doctoring them to 4bsd form */ 2259 while (more_dirs && bigenough) { 2260 nfsm_dissect(tl, u_int32_t *, 3 * NFSX_UNSIGNED); 2261 fxdr_hyper(tl, &fileno); 2262 len = fxdr_unsigned(int, *(tl + 2)); 2263 if (len <= 0 || len > NFS_MAXNAMLEN) { 2264 error = EBADRPC; 2265 m_freem(mrep); 2266 goto nfsmout; 2267 } 2268 tlen = nfsm_rndup(len); 2269 if (tlen == len) 2270 tlen += 4; /* To ensure null termination*/ 2271 left = DIRBLKSIZ - blksiz; 2272 if ((tlen + DIRHDSIZ) > left) { 2273 dp->d_reclen += left; 2274 uiop->uio_iov->iov_base += left; 2275 uiop->uio_iov->iov_len -= left; 2276 uiop->uio_offset += left; 2277 uiop->uio_resid -= left; 2278 blksiz = 0; 2279 } 2280 if ((tlen + DIRHDSIZ) > uiop->uio_resid) 2281 bigenough = 0; 2282 if (bigenough) { 2283 dp = (struct dirent *)uiop->uio_iov->iov_base; 2284 dp->d_fileno = (int)fileno; 2285 dp->d_namlen = len; 2286 dp->d_reclen = tlen + DIRHDSIZ; 2287 dp->d_type = DT_UNKNOWN; 2288 blksiz += dp->d_reclen; 2289 if (blksiz == DIRBLKSIZ) 2290 blksiz = 0; 2291 uiop->uio_offset += DIRHDSIZ; 2292 uiop->uio_resid -= DIRHDSIZ; 2293 uiop->uio_iov->iov_base += DIRHDSIZ; 2294 uiop->uio_iov->iov_len -= DIRHDSIZ; 2295 cnp->cn_nameptr = uiop->uio_iov->iov_base; 2296 cnp->cn_namelen = len; 2297 nfsm_mtouio(uiop, len); 2298 cp = uiop->uio_iov->iov_base; 2299 tlen -= len; 2300 *cp = '\0'; 2301 uiop->uio_iov->iov_base += tlen; 2302 uiop->uio_iov->iov_len -= tlen; 2303 uiop->uio_offset += tlen; 2304 uiop->uio_resid -= tlen; 2305 } else 2306 nfsm_adv(nfsm_rndup(len)); 2307 nfsm_dissect(tl, u_int32_t *, 3 * NFSX_UNSIGNED); 2308 if (bigenough) { 2309 cookie.nfsuquad[0] = *tl++; 2310 cookie.nfsuquad[1] = *tl++; 2311 } else 2312 tl += 2; 2313 2314 /* 2315 * Since the attributes are before the file handle 2316 * (sigh), we must skip over the attributes and then 2317 * come back and get them. 2318 */ 2319 attrflag = fxdr_unsigned(int, *tl); 2320 if (attrflag) { 2321 dpossav1 = dpos; 2322 mdsav1 = md; 2323 nfsm_adv(NFSX_V3FATTR); 2324 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 2325 doit = fxdr_unsigned(int, *tl); 2326 if (doit) { 2327 nfsm_getfh(fhp, fhsize, 1); 2328 if (NFS_CMPFH(dnp, fhp, fhsize)) { 2329 VREF(vp); 2330 newvp = vp; 2331 np = dnp; 2332 } else { 2333 error = nfs_nget(vp->v_mount, fhp, 2334 fhsize, &np); 2335 if (error) 2336 doit = 0; 2337 else 2338 newvp = NFSTOV(np); 2339 } 2340 } 2341 if (doit) { 2342 dpossav2 = dpos; 2343 dpos = dpossav1; 2344 mdsav2 = md; 2345 md = mdsav1; 2346 nfsm_loadattr(newvp, (struct vattr *)0); 2347 dpos = dpossav2; 2348 md = mdsav2; 2349 dp->d_type = 2350 IFTODT(VTTOIF(np->n_vattr.va_type)); 2351 ndp->ni_vp = newvp; 2352 cnp->cn_hash = 0; 2353 for (cp = cnp->cn_nameptr, i = 1; i <= len; 2354 i++, cp++) 2355 cnp->cn_hash += (unsigned char)*cp * i; 2356 cache_enter(ndp->ni_dvp, ndp->ni_vp, cnp); 2357 } 2358 } else { 2359 /* Just skip over the file handle */ 2360 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 2361 i = fxdr_unsigned(int, *tl); 2362 nfsm_adv(nfsm_rndup(i)); 2363 } 2364 if (newvp != NULLVP) { 2365 vrele(newvp); 2366 newvp = NULLVP; 2367 } 2368 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 2369 more_dirs = fxdr_unsigned(int, *tl); 2370 } 2371 /* 2372 * If at end of rpc data, get the eof boolean 2373 */ 2374 if (!more_dirs) { 2375 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 2376 more_dirs = (fxdr_unsigned(int, *tl) == 0); 2377 } 2378 m_freem(mrep); 2379 } 2380 /* 2381 * Fill last record, iff any, out to a multiple of DIRBLKSIZ 2382 * by increasing d_reclen for the last record. 2383 */ 2384 if (blksiz > 0) { 2385 left = DIRBLKSIZ - blksiz; 2386 dp->d_reclen += left; 2387 uiop->uio_iov->iov_base += left; 2388 uiop->uio_iov->iov_len -= left; 2389 uiop->uio_offset += left; 2390 uiop->uio_resid -= left; 2391 } 2392 2393 /* 2394 * We are now either at the end of the directory or have filled the 2395 * block. 2396 */ 2397 if (bigenough) 2398 dnp->n_direofoffset = uiop->uio_offset; 2399 else { 2400 if (uiop->uio_resid > 0) 2401 printf("EEK! readdirplusrpc resid > 0\n"); 2402 cookiep = nfs_getcookie(dnp, uiop->uio_offset, 1); 2403 *cookiep = cookie; 2404 } 2405nfsmout: 2406 if (newvp != NULLVP) { 2407 if (newvp == vp) 2408 vrele(newvp); 2409 else 2410 vput(newvp); 2411 newvp = NULLVP; 2412 } 2413 return (error); 2414} 2415 2416/* 2417 * Silly rename. To make the NFS filesystem that is stateless look a little 2418 * more like the "ufs" a remove of an active vnode is translated to a rename 2419 * to a funny looking filename that is removed by nfs_inactive on the 2420 * nfsnode. There is the potential for another process on a different client 2421 * to create the same funny name between the nfs_lookitup() fails and the 2422 * nfs_rename() completes, but... 2423 */ 2424static int 2425nfs_sillyrename(dvp, vp, cnp) 2426 struct vnode *dvp, *vp; 2427 struct componentname *cnp; 2428{ 2429 register struct sillyrename *sp; 2430 struct nfsnode *np; 2431 int error; 2432 short pid; 2433 2434 cache_purge(dvp); 2435 np = VTONFS(vp); 2436#ifndef DIAGNOSTIC 2437 if (vp->v_type == VDIR) 2438 panic("nfs: sillyrename dir"); 2439#endif 2440 MALLOC(sp, struct sillyrename *, sizeof (struct sillyrename), 2441 M_NFSREQ, M_WAITOK); 2442 sp->s_cred = crdup(cnp->cn_cred); 2443 sp->s_dvp = dvp; 2444 VREF(dvp); 2445 2446 /* Fudge together a funny name */ 2447 pid = cnp->cn_proc->p_pid; 2448 sp->s_namlen = sprintf(sp->s_name, ".nfsA%04x4.4", pid); 2449 2450 /* Try lookitups until we get one that isn't there */ 2451 while (nfs_lookitup(dvp, sp->s_name, sp->s_namlen, sp->s_cred, 2452 cnp->cn_proc, (struct nfsnode **)0) == 0) { 2453 sp->s_name[4]++; 2454 if (sp->s_name[4] > 'z') { 2455 error = EINVAL; 2456 goto bad; 2457 } 2458 } 2459 error = nfs_renameit(dvp, cnp, sp); 2460 if (error) 2461 goto bad; 2462 error = nfs_lookitup(dvp, sp->s_name, sp->s_namlen, sp->s_cred, 2463 cnp->cn_proc, &np); 2464 np->n_sillyrename = sp; 2465 return (0); 2466bad: 2467 vrele(sp->s_dvp); 2468 crfree(sp->s_cred); 2469 free((caddr_t)sp, M_NFSREQ); 2470 return (error); 2471} 2472 2473/* 2474 * Look up a file name and optionally either update the file handle or 2475 * allocate an nfsnode, depending on the value of npp. 2476 * npp == NULL --> just do the lookup 2477 * *npp == NULL --> allocate a new nfsnode and make sure attributes are 2478 * handled too 2479 * *npp != NULL --> update the file handle in the vnode 2480 */ 2481static int 2482nfs_lookitup(dvp, name, len, cred, procp, npp) 2483 register struct vnode *dvp; 2484 const char *name; 2485 int len; 2486 struct ucred *cred; 2487 struct proc *procp; 2488 struct nfsnode **npp; 2489{ 2490 register u_int32_t *tl; 2491 register caddr_t cp; 2492 register int32_t t1, t2; 2493 struct vnode *newvp = (struct vnode *)0; 2494 struct nfsnode *np, *dnp = VTONFS(dvp); 2495 caddr_t bpos, dpos, cp2; 2496 int error = 0, fhlen, attrflag; 2497 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 2498 nfsfh_t *nfhp; 2499 int v3 = NFS_ISV3(dvp); 2500 2501 nfsstats.rpccnt[NFSPROC_LOOKUP]++; 2502 nfsm_reqhead(dvp, NFSPROC_LOOKUP, 2503 NFSX_FH(v3) + NFSX_UNSIGNED + nfsm_rndup(len)); 2504 nfsm_fhtom(dvp, v3); 2505 nfsm_strtom(name, len, NFS_MAXNAMLEN); 2506 nfsm_request(dvp, NFSPROC_LOOKUP, procp, cred); 2507 if (npp && !error) { 2508 nfsm_getfh(nfhp, fhlen, v3); 2509 if (*npp) { 2510 np = *npp; 2511 if (np->n_fhsize > NFS_SMALLFH && fhlen <= NFS_SMALLFH) { 2512 free((caddr_t)np->n_fhp, M_NFSBIGFH); 2513 np->n_fhp = &np->n_fh; 2514 } else if (np->n_fhsize <= NFS_SMALLFH && fhlen>NFS_SMALLFH) 2515 np->n_fhp =(nfsfh_t *)malloc(fhlen,M_NFSBIGFH,M_WAITOK); 2516 bcopy((caddr_t)nfhp, (caddr_t)np->n_fhp, fhlen); 2517 np->n_fhsize = fhlen; 2518 newvp = NFSTOV(np); 2519 } else if (NFS_CMPFH(dnp, nfhp, fhlen)) { 2520 VREF(dvp); 2521 newvp = dvp; 2522 } else { 2523 error = nfs_nget(dvp->v_mount, nfhp, fhlen, &np); 2524 if (error) { 2525 m_freem(mrep); 2526 return (error); 2527 } 2528 newvp = NFSTOV(np); 2529 } 2530 if (v3) { 2531 nfsm_postop_attr(newvp, attrflag); 2532 if (!attrflag && *npp == NULL) { 2533 m_freem(mrep); 2534 if (newvp == dvp) 2535 vrele(newvp); 2536 else 2537 vput(newvp); 2538 return (ENOENT); 2539 } 2540 } else 2541 nfsm_loadattr(newvp, (struct vattr *)0); 2542 } 2543 nfsm_reqdone; 2544 if (npp && *npp == NULL) { 2545 if (error) { 2546 if (newvp) { 2547 if (newvp == dvp) 2548 vrele(newvp); 2549 else 2550 vput(newvp); 2551 } 2552 } else 2553 *npp = np; 2554 } 2555 return (error); 2556} 2557 2558/* 2559 * Nfs Version 3 commit rpc 2560 */ 2561static int 2562nfs_commit(vp, offset, cnt, cred, procp) 2563 register struct vnode *vp; 2564 u_quad_t offset; 2565 int cnt; 2566 struct ucred *cred; 2567 struct proc *procp; 2568{ 2569 register caddr_t cp; 2570 register u_int32_t *tl; 2571 register int32_t t1, t2; 2572 register struct nfsmount *nmp = VFSTONFS(vp->v_mount); 2573 caddr_t bpos, dpos, cp2; 2574 int error = 0, wccflag = NFSV3_WCCRATTR; 2575 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 2576 2577 if ((nmp->nm_state & NFSSTA_HASWRITEVERF) == 0) 2578 return (0); 2579 nfsstats.rpccnt[NFSPROC_COMMIT]++; 2580 nfsm_reqhead(vp, NFSPROC_COMMIT, NFSX_FH(1)); 2581 nfsm_fhtom(vp, 1); 2582 nfsm_build(tl, u_int32_t *, 3 * NFSX_UNSIGNED); 2583 txdr_hyper(&offset, tl); 2584 tl += 2; 2585 *tl = txdr_unsigned(cnt); 2586 nfsm_request(vp, NFSPROC_COMMIT, procp, cred); 2587 nfsm_wcc_data(vp, wccflag); 2588 if (!error) { 2589 nfsm_dissect(tl, u_int32_t *, NFSX_V3WRITEVERF); 2590 if (bcmp((caddr_t)nmp->nm_verf, (caddr_t)tl, 2591 NFSX_V3WRITEVERF)) { 2592 bcopy((caddr_t)tl, (caddr_t)nmp->nm_verf, 2593 NFSX_V3WRITEVERF); 2594 error = NFSERR_STALEWRITEVERF; 2595 } 2596 } 2597 nfsm_reqdone; 2598 return (error); 2599} 2600 2601/* 2602 * Kludge City.. 2603 * - make nfs_bmap() essentially a no-op that does no translation 2604 * - do nfs_strategy() by doing I/O with nfs_readrpc/nfs_writerpc 2605 * (Maybe I could use the process's page mapping, but I was concerned that 2606 * Kernel Write might not be enabled and also figured copyout() would do 2607 * a lot more work than bcopy() and also it currently happens in the 2608 * context of the swapper process (2). 2609 */ 2610static int 2611nfs_bmap(ap) 2612 struct vop_bmap_args /* { 2613 struct vnode *a_vp; 2614 daddr_t a_bn; 2615 struct vnode **a_vpp; 2616 daddr_t *a_bnp; 2617 int *a_runp; 2618 int *a_runb; 2619 } */ *ap; 2620{ 2621 register struct vnode *vp = ap->a_vp; 2622 2623 if (ap->a_vpp != NULL) 2624 *ap->a_vpp = vp; 2625 if (ap->a_bnp != NULL) 2626 *ap->a_bnp = ap->a_bn * btodb(vp->v_mount->mnt_stat.f_iosize); 2627 if (ap->a_runp != NULL) 2628 *ap->a_runp = 0; 2629 if (ap->a_runb != NULL) 2630 *ap->a_runb = 0; 2631 return (0); 2632} 2633 2634/* 2635 * Strategy routine. 2636 * For async requests when nfsiod(s) are running, queue the request by 2637 * calling nfs_asyncio(), otherwise just all nfs_doio() to do the 2638 * request. 2639 */ 2640static int 2641nfs_strategy(ap) 2642 struct vop_strategy_args *ap; 2643{ 2644 register struct buf *bp = ap->a_bp; 2645 struct ucred *cr; 2646 struct proc *p; 2647 int error = 0; 2648 2649 KASSERT(!(bp->b_flags & B_DONE), ("nfs_strategy: buffer %p unexpectedly marked B_DONE", bp)); 2650 KASSERT((bp->b_flags & B_BUSY), ("nfs_strategy: buffer %p not B_BUSY", bp)); 2651 2652 if (bp->b_flags & B_PHYS) 2653 panic("nfs physio"); 2654 2655 if (bp->b_flags & B_ASYNC) 2656 p = (struct proc *)0; 2657 else 2658 p = curproc; /* XXX */ 2659 2660 if (bp->b_flags & B_READ) 2661 cr = bp->b_rcred; 2662 else 2663 cr = bp->b_wcred; 2664 2665 /* 2666 * If the op is asynchronous and an i/o daemon is waiting 2667 * queue the request, wake it up and wait for completion 2668 * otherwise just do it ourselves. 2669 */ 2670 if ((bp->b_flags & B_ASYNC) == 0 || 2671 nfs_asyncio(bp, NOCRED, p)) 2672 error = nfs_doio(bp, cr, p); 2673 return (error); 2674} 2675 2676/* 2677 * Mmap a file 2678 * 2679 * NB Currently unsupported. 2680 */ 2681/* ARGSUSED */ 2682static int 2683nfs_mmap(ap) 2684 struct vop_mmap_args /* { 2685 struct vnode *a_vp; 2686 int a_fflags; 2687 struct ucred *a_cred; 2688 struct proc *a_p; 2689 } */ *ap; 2690{ 2691 2692 return (EINVAL); 2693} 2694 2695/* 2696 * fsync vnode op. Just call nfs_flush() with commit == 1. 2697 */ 2698/* ARGSUSED */ 2699static int 2700nfs_fsync(ap) 2701 struct vop_fsync_args /* { 2702 struct vnodeop_desc *a_desc; 2703 struct vnode * a_vp; 2704 struct ucred * a_cred; 2705 int a_waitfor; 2706 struct proc * a_p; 2707 } */ *ap; 2708{ 2709 2710 return (nfs_flush(ap->a_vp, ap->a_cred, ap->a_waitfor, ap->a_p, 1)); 2711} 2712 2713/* 2714 * Flush all the blocks associated with a vnode. 2715 * Walk through the buffer pool and push any dirty pages 2716 * associated with the vnode. 2717 */ 2718static int 2719nfs_flush(vp, cred, waitfor, p, commit) 2720 register struct vnode *vp; 2721 struct ucred *cred; 2722 int waitfor; 2723 struct proc *p; 2724 int commit; 2725{ 2726 register struct nfsnode *np = VTONFS(vp); 2727 register struct buf *bp; 2728 register int i; 2729 struct buf *nbp; 2730 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 2731 int s, error = 0, slptimeo = 0, slpflag = 0, retv, bvecpos; 2732 int passone = 1; 2733 u_quad_t off, endoff, toff; 2734 struct ucred* wcred = NULL; 2735 struct buf **bvec = NULL; 2736#ifndef NFS_COMMITBVECSIZ 2737#define NFS_COMMITBVECSIZ 20 2738#endif 2739 struct buf *bvec_on_stack[NFS_COMMITBVECSIZ]; 2740 int bvecsize = 0, bveccount; 2741 2742 if (nmp->nm_flag & NFSMNT_INT) 2743 slpflag = PCATCH; 2744 if (!commit) 2745 passone = 0; 2746 /* 2747 * A b_flags == (B_DELWRI | B_NEEDCOMMIT) block has been written to the 2748 * server, but nas not been committed to stable storage on the server 2749 * yet. On the first pass, the byte range is worked out and the commit 2750 * rpc is done. On the second pass, nfs_writebp() is called to do the 2751 * job. 2752 */ 2753again: 2754 off = (u_quad_t)-1; 2755 endoff = 0; 2756 bvecpos = 0; 2757 if (NFS_ISV3(vp) && commit) { 2758 s = splbio(); 2759 /* 2760 * Count up how many buffers waiting for a commit. 2761 */ 2762 bveccount = 0; 2763 for (bp = TAILQ_FIRST(&vp->v_dirtyblkhd); bp; bp = nbp) { 2764 nbp = TAILQ_NEXT(bp, b_vnbufs); 2765 if ((bp->b_flags & (B_BUSY | B_DELWRI | B_NEEDCOMMIT)) 2766 == (B_DELWRI | B_NEEDCOMMIT)) 2767 bveccount++; 2768 } 2769 /* 2770 * Allocate space to remember the list of bufs to commit. It is 2771 * important to use M_NOWAIT here to avoid a race with nfs_write. 2772 * If we can't get memory (for whatever reason), we will end up 2773 * committing the buffers one-by-one in the loop below. 2774 */ 2775 if (bveccount > NFS_COMMITBVECSIZ) { 2776 if (bvec != NULL && bvec != bvec_on_stack) 2777 free(bvec, M_TEMP); 2778 bvec = (struct buf **) 2779 malloc(bveccount * sizeof(struct buf *), 2780 M_TEMP, M_NOWAIT); 2781 if (bvec == NULL) { 2782 bvec = bvec_on_stack; 2783 bvecsize = NFS_COMMITBVECSIZ; 2784 } else 2785 bvecsize = bveccount; 2786 } else { 2787 bvec = bvec_on_stack; 2788 bvecsize = NFS_COMMITBVECSIZ; 2789 } 2790 for (bp = TAILQ_FIRST(&vp->v_dirtyblkhd); bp; bp = nbp) { 2791 nbp = TAILQ_NEXT(bp, b_vnbufs); 2792 if (bvecpos >= bvecsize) 2793 break; 2794 if ((bp->b_flags & (B_BUSY | B_DELWRI | B_NEEDCOMMIT)) 2795 != (B_DELWRI | B_NEEDCOMMIT)) 2796 continue; 2797 bremfree(bp); 2798 /* 2799 * Work out if all buffers are using the same cred 2800 * so we can deal with them all with one commit. 2801 * 2802 * NOTE: we are not clearing B_DONE here, so we have 2803 * to do it later on in this routine if we intend to 2804 * initiate I/O on the bp. 2805 */ 2806 if (wcred == NULL) 2807 wcred = bp->b_wcred; 2808 else if (wcred != bp->b_wcred) 2809 wcred = NOCRED; 2810 bp->b_flags |= (B_BUSY | B_WRITEINPROG); 2811 vfs_busy_pages(bp, 1); 2812 2813 /* 2814 * bp is protected by being B_BUSY, but nbp is not 2815 * and vfs_busy_pages() may sleep. We have to 2816 * recalculate nbp. 2817 */ 2818 nbp = TAILQ_NEXT(bp, b_vnbufs); 2819 2820 /* 2821 * A list of these buffers is kept so that the 2822 * second loop knows which buffers have actually 2823 * been committed. This is necessary, since there 2824 * may be a race between the commit rpc and new 2825 * uncommitted writes on the file. 2826 */ 2827 bvec[bvecpos++] = bp; 2828 toff = ((u_quad_t)bp->b_blkno) * DEV_BSIZE + 2829 bp->b_dirtyoff; 2830 if (toff < off) 2831 off = toff; 2832 toff += (u_quad_t)(bp->b_dirtyend - bp->b_dirtyoff); 2833 if (toff > endoff) 2834 endoff = toff; 2835 } 2836 splx(s); 2837 } 2838 if (bvecpos > 0) { 2839 /* 2840 * Commit data on the server, as required. 2841 * If all bufs are using the same wcred, then use that with 2842 * one call for all of them, otherwise commit each one 2843 * separately. 2844 */ 2845 if (wcred != NOCRED) 2846 retv = nfs_commit(vp, off, (int)(endoff - off), 2847 wcred, p); 2848 else { 2849 retv = 0; 2850 for (i = 0; i < bvecpos; i++) { 2851 off_t off, size; 2852 bp = bvec[i]; 2853 off = ((u_quad_t)bp->b_blkno) * DEV_BSIZE + 2854 bp->b_dirtyoff; 2855 size = (u_quad_t)(bp->b_dirtyend 2856 - bp->b_dirtyoff); 2857 retv = nfs_commit(vp, off, (int)size, 2858 bp->b_wcred, p); 2859 if (retv) break; 2860 } 2861 } 2862 2863 if (retv == NFSERR_STALEWRITEVERF) 2864 nfs_clearcommit(vp->v_mount); 2865 2866 /* 2867 * Now, either mark the blocks I/O done or mark the 2868 * blocks dirty, depending on whether the commit 2869 * succeeded. 2870 */ 2871 for (i = 0; i < bvecpos; i++) { 2872 bp = bvec[i]; 2873 bp->b_flags &= ~(B_NEEDCOMMIT | B_WRITEINPROG); 2874 if (retv) { 2875 /* 2876 * Error, leave B_DELWRI intact 2877 */ 2878 vfs_unbusy_pages(bp); 2879 brelse(bp); 2880 } else { 2881 /* 2882 * Success, remove B_DELWRI ( bundirty() ). 2883 * 2884 * b_dirtyoff/b_dirtyend seem to be NFS 2885 * specific. We should probably move that 2886 * into bundirty(). XXX 2887 */ 2888 s = splbio(); 2889 vp->v_numoutput++; 2890 bp->b_flags |= B_ASYNC; 2891 bundirty(bp); 2892 bp->b_flags &= ~(B_READ|B_DONE|B_ERROR); 2893 bp->b_dirtyoff = bp->b_dirtyend = 0; 2894 splx(s); 2895 biodone(bp); 2896 } 2897 } 2898 } 2899 2900 /* 2901 * Start/do any write(s) that are required. 2902 */ 2903loop: 2904 s = splbio(); 2905 for (bp = TAILQ_FIRST(&vp->v_dirtyblkhd); bp; bp = nbp) { 2906 nbp = TAILQ_NEXT(bp, b_vnbufs); 2907 if (bp->b_flags & B_BUSY) { 2908 if (waitfor != MNT_WAIT || passone) 2909 continue; 2910 bp->b_flags |= B_WANTED; 2911 error = tsleep((caddr_t)bp, slpflag | (PRIBIO + 1), 2912 "nfsfsync", slptimeo); 2913 splx(s); 2914 if (error) { 2915 if (nfs_sigintr(nmp, (struct nfsreq *)0, p)) { 2916 error = EINTR; 2917 goto done; 2918 } 2919 if (slpflag == PCATCH) { 2920 slpflag = 0; 2921 slptimeo = 2 * hz; 2922 } 2923 } 2924 goto loop; 2925 } 2926 if ((bp->b_flags & B_DELWRI) == 0) 2927 panic("nfs_fsync: not dirty"); 2928 if ((passone || !commit) && (bp->b_flags & B_NEEDCOMMIT)) 2929 continue; 2930 bremfree(bp); 2931 if (passone || !commit) 2932 bp->b_flags |= (B_BUSY|B_ASYNC); 2933 else 2934 bp->b_flags |= (B_BUSY|B_ASYNC|B_WRITEINPROG|B_NEEDCOMMIT); 2935 splx(s); 2936 VOP_BWRITE(bp); 2937 goto loop; 2938 } 2939 splx(s); 2940 if (passone) { 2941 passone = 0; 2942 goto again; 2943 } 2944 if (waitfor == MNT_WAIT) { 2945 while (vp->v_numoutput) { 2946 vp->v_flag |= VBWAIT; 2947 error = tsleep((caddr_t)&vp->v_numoutput, 2948 slpflag | (PRIBIO + 1), "nfsfsync", slptimeo); 2949 if (error) { 2950 if (nfs_sigintr(nmp, (struct nfsreq *)0, p)) { 2951 error = EINTR; 2952 goto done; 2953 } 2954 if (slpflag == PCATCH) { 2955 slpflag = 0; 2956 slptimeo = 2 * hz; 2957 } 2958 } 2959 } 2960 if (!TAILQ_EMPTY(&vp->v_dirtyblkhd) && commit) { 2961 goto loop; 2962 } 2963 } 2964 if (np->n_flag & NWRITEERR) { 2965 error = np->n_error; 2966 np->n_flag &= ~NWRITEERR; 2967 } 2968done: 2969 if (bvec != NULL && bvec != bvec_on_stack) 2970 free(bvec, M_TEMP); 2971 return (error); 2972} 2973 2974/* 2975 * NFS advisory byte-level locks. 2976 * Currently unsupported. 2977 */ 2978static int 2979nfs_advlock(ap) 2980 struct vop_advlock_args /* { 2981 struct vnode *a_vp; 2982 caddr_t a_id; 2983 int a_op; 2984 struct flock *a_fl; 2985 int a_flags; 2986 } */ *ap; 2987{ 2988 register struct nfsnode *np = VTONFS(ap->a_vp); 2989 2990 /* 2991 * The following kludge is to allow diskless support to work 2992 * until a real NFS lockd is implemented. Basically, just pretend 2993 * that this is a local lock. 2994 */ 2995 return (lf_advlock(ap, &(np->n_lockf), np->n_size)); 2996} 2997 2998/* 2999 * Print out the contents of an nfsnode. 3000 */ 3001static int 3002nfs_print(ap) 3003 struct vop_print_args /* { 3004 struct vnode *a_vp; 3005 } */ *ap; 3006{ 3007 register struct vnode *vp = ap->a_vp; 3008 register struct nfsnode *np = VTONFS(vp); 3009 3010 printf("tag VT_NFS, fileid %ld fsid 0x%lx", 3011 np->n_vattr.va_fileid, np->n_vattr.va_fsid); 3012 if (vp->v_type == VFIFO) 3013 fifo_printinfo(vp); 3014 printf("\n"); 3015 return (0); 3016} 3017 3018/* 3019 * Just call nfs_writebp() with the force argument set to 1. 3020 * 3021 * NOTE: B_DONE may or may not be set in a_bp on call. 3022 */ 3023static int 3024nfs_bwrite(ap) 3025 struct vop_bwrite_args /* { 3026 struct vnode *a_bp; 3027 } */ *ap; 3028{ 3029 return (nfs_writebp(ap->a_bp, 1, curproc)); 3030} 3031 3032/* 3033 * This is a clone of vn_bwrite(), except that B_WRITEINPROG isn't set unless 3034 * the force flag is one and it also handles the B_NEEDCOMMIT flag. We set 3035 * B_CACHE if this is a VMIO buffer. 3036 */ 3037int 3038nfs_writebp(bp, force, procp) 3039 register struct buf *bp; 3040 int force; 3041 struct proc *procp; 3042{ 3043 int s; 3044 int oldflags = bp->b_flags; 3045 int retv = 1; 3046 off_t off; 3047 3048 if(!(bp->b_flags & B_BUSY)) 3049 panic("bwrite: buffer is not busy???"); 3050 3051 if (bp->b_flags & B_INVAL) { 3052 brelse(bp); 3053 return(0); 3054 } 3055 3056 bp->b_flags |= B_CACHE; 3057 3058 /* 3059 * Undirty the bp. We will redirty it later if the I/O fails. 3060 */ 3061 3062 s = splbio(); 3063 bundirty(bp); 3064 bp->b_flags &= ~(B_READ|B_DONE|B_ERROR); 3065 3066 bp->b_vp->v_numoutput++; 3067 curproc->p_stats->p_ru.ru_oublock++; 3068 splx(s); 3069 3070 /* 3071 * If B_NEEDCOMMIT is set, a commit rpc may do the trick. If not 3072 * an actual write will have to be scheduled via. VOP_STRATEGY(). 3073 * If B_WRITEINPROG is already set, then push it with a write anyhow. 3074 */ 3075 vfs_busy_pages(bp, 1); 3076 if ((oldflags & (B_NEEDCOMMIT | B_WRITEINPROG)) == B_NEEDCOMMIT) { 3077 off = ((u_quad_t)bp->b_blkno) * DEV_BSIZE + bp->b_dirtyoff; 3078 bp->b_flags |= B_WRITEINPROG; 3079 retv = nfs_commit(bp->b_vp, off, bp->b_dirtyend-bp->b_dirtyoff, 3080 bp->b_wcred, procp); 3081 bp->b_flags &= ~B_WRITEINPROG; 3082 if (!retv) { 3083 bp->b_dirtyoff = bp->b_dirtyend = 0; 3084 bp->b_flags &= ~B_NEEDCOMMIT; 3085 biodone(bp); 3086 } else if (retv == NFSERR_STALEWRITEVERF) { 3087 nfs_clearcommit(bp->b_vp->v_mount); 3088 } 3089 } 3090 if (retv) { 3091 if (force) 3092 bp->b_flags |= B_WRITEINPROG; 3093 VOP_STRATEGY(bp->b_vp, bp); 3094 } 3095 3096 if( (oldflags & B_ASYNC) == 0) { 3097 int rtval = biowait(bp); 3098 3099 if (oldflags & B_DELWRI) { 3100 s = splbio(); 3101 reassignbuf(bp, bp->b_vp); 3102 splx(s); 3103 } 3104 3105 brelse(bp); 3106 return (rtval); 3107 } 3108 3109 return (0); 3110} 3111 3112/* 3113 * nfs special file access vnode op. 3114 * Essentially just get vattr and then imitate iaccess() since the device is 3115 * local to the client. 3116 */ 3117static int 3118nfsspec_access(ap) 3119 struct vop_access_args /* { 3120 struct vnode *a_vp; 3121 int a_mode; 3122 struct ucred *a_cred; 3123 struct proc *a_p; 3124 } */ *ap; 3125{ 3126 register struct vattr *vap; 3127 register gid_t *gp; 3128 register struct ucred *cred = ap->a_cred; 3129 struct vnode *vp = ap->a_vp; 3130 mode_t mode = ap->a_mode; 3131 struct vattr vattr; 3132 register int i; 3133 int error; 3134 3135 /* 3136 * Disallow write attempts on filesystems mounted read-only; 3137 * unless the file is a socket, fifo, or a block or character 3138 * device resident on the filesystem. 3139 */ 3140 if ((mode & VWRITE) && (vp->v_mount->mnt_flag & MNT_RDONLY)) { 3141 switch (vp->v_type) { 3142 case VREG: 3143 case VDIR: 3144 case VLNK: 3145 return (EROFS); 3146 default: 3147 break; 3148 } 3149 } 3150 /* 3151 * If you're the super-user, 3152 * you always get access. 3153 */ 3154 if (cred->cr_uid == 0) 3155 return (0); 3156 vap = &vattr; 3157 error = VOP_GETATTR(vp, vap, cred, ap->a_p); 3158 if (error) 3159 return (error); 3160 /* 3161 * Access check is based on only one of owner, group, public. 3162 * If not owner, then check group. If not a member of the 3163 * group, then check public access. 3164 */ 3165 if (cred->cr_uid != vap->va_uid) { 3166 mode >>= 3; 3167 gp = cred->cr_groups; 3168 for (i = 0; i < cred->cr_ngroups; i++, gp++) 3169 if (vap->va_gid == *gp) 3170 goto found; 3171 mode >>= 3; 3172found: 3173 ; 3174 } 3175 error = (vap->va_mode & mode) == mode ? 0 : EACCES; 3176 return (error); 3177} 3178 3179/* 3180 * Read wrapper for special devices. 3181 */ 3182static int 3183nfsspec_read(ap) 3184 struct vop_read_args /* { 3185 struct vnode *a_vp; 3186 struct uio *a_uio; 3187 int a_ioflag; 3188 struct ucred *a_cred; 3189 } */ *ap; 3190{ 3191 register struct nfsnode *np = VTONFS(ap->a_vp); 3192 3193 /* 3194 * Set access flag. 3195 */ 3196 np->n_flag |= NACC; 3197 getnanotime(&np->n_atim); 3198 return (VOCALL(spec_vnodeop_p, VOFFSET(vop_read), ap)); 3199} 3200 3201/* 3202 * Write wrapper for special devices. 3203 */ 3204static int 3205nfsspec_write(ap) 3206 struct vop_write_args /* { 3207 struct vnode *a_vp; 3208 struct uio *a_uio; 3209 int a_ioflag; 3210 struct ucred *a_cred; 3211 } */ *ap; 3212{ 3213 register struct nfsnode *np = VTONFS(ap->a_vp); 3214 3215 /* 3216 * Set update flag. 3217 */ 3218 np->n_flag |= NUPD; 3219 getnanotime(&np->n_mtim); 3220 return (VOCALL(spec_vnodeop_p, VOFFSET(vop_write), ap)); 3221} 3222 3223/* 3224 * Close wrapper for special devices. 3225 * 3226 * Update the times on the nfsnode then do device close. 3227 */ 3228static int 3229nfsspec_close(ap) 3230 struct vop_close_args /* { 3231 struct vnode *a_vp; 3232 int a_fflag; 3233 struct ucred *a_cred; 3234 struct proc *a_p; 3235 } */ *ap; 3236{ 3237 register struct vnode *vp = ap->a_vp; 3238 register struct nfsnode *np = VTONFS(vp); 3239 struct vattr vattr; 3240 3241 if (np->n_flag & (NACC | NUPD)) { 3242 np->n_flag |= NCHG; 3243 if (vp->v_usecount == 1 && 3244 (vp->v_mount->mnt_flag & MNT_RDONLY) == 0) { 3245 VATTR_NULL(&vattr); 3246 if (np->n_flag & NACC) 3247 vattr.va_atime = np->n_atim; 3248 if (np->n_flag & NUPD) 3249 vattr.va_mtime = np->n_mtim; 3250 (void)VOP_SETATTR(vp, &vattr, ap->a_cred, ap->a_p); 3251 } 3252 } 3253 return (VOCALL(spec_vnodeop_p, VOFFSET(vop_close), ap)); 3254} 3255 3256/* 3257 * Read wrapper for fifos. 3258 */ 3259static int 3260nfsfifo_read(ap) 3261 struct vop_read_args /* { 3262 struct vnode *a_vp; 3263 struct uio *a_uio; 3264 int a_ioflag; 3265 struct ucred *a_cred; 3266 } */ *ap; 3267{ 3268 register struct nfsnode *np = VTONFS(ap->a_vp); 3269 3270 /* 3271 * Set access flag. 3272 */ 3273 np->n_flag |= NACC; 3274 getnanotime(&np->n_atim); 3275 return (VOCALL(fifo_vnodeop_p, VOFFSET(vop_read), ap)); 3276} 3277 3278/* 3279 * Write wrapper for fifos. 3280 */ 3281static int 3282nfsfifo_write(ap) 3283 struct vop_write_args /* { 3284 struct vnode *a_vp; 3285 struct uio *a_uio; 3286 int a_ioflag; 3287 struct ucred *a_cred; 3288 } */ *ap; 3289{ 3290 register struct nfsnode *np = VTONFS(ap->a_vp); 3291 3292 /* 3293 * Set update flag. 3294 */ 3295 np->n_flag |= NUPD; 3296 getnanotime(&np->n_mtim); 3297 return (VOCALL(fifo_vnodeop_p, VOFFSET(vop_write), ap)); 3298} 3299 3300/* 3301 * Close wrapper for fifos. 3302 * 3303 * Update the times on the nfsnode then do fifo close. 3304 */ 3305static int 3306nfsfifo_close(ap) 3307 struct vop_close_args /* { 3308 struct vnode *a_vp; 3309 int a_fflag; 3310 struct ucred *a_cred; 3311 struct proc *a_p; 3312 } */ *ap; 3313{ 3314 register struct vnode *vp = ap->a_vp; 3315 register struct nfsnode *np = VTONFS(vp); 3316 struct vattr vattr; 3317 struct timespec ts; 3318 3319 if (np->n_flag & (NACC | NUPD)) { 3320 getnanotime(&ts); 3321 if (np->n_flag & NACC) 3322 np->n_atim = ts; 3323 if (np->n_flag & NUPD) 3324 np->n_mtim = ts; 3325 np->n_flag |= NCHG; 3326 if (vp->v_usecount == 1 && 3327 (vp->v_mount->mnt_flag & MNT_RDONLY) == 0) { 3328 VATTR_NULL(&vattr); 3329 if (np->n_flag & NACC) 3330 vattr.va_atime = np->n_atim; 3331 if (np->n_flag & NUPD) 3332 vattr.va_mtime = np->n_mtim; 3333 (void)VOP_SETATTR(vp, &vattr, ap->a_cred, ap->a_p); 3334 } 3335 } 3336 return (VOCALL(fifo_vnodeop_p, VOFFSET(vop_close), ap)); 3337} 3338