1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD 3 * 4 * Copyright (c) 2000-2001 Boris Popov 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 * SUCH DAMAGE. 27 * 28 * $FreeBSD$ 29 * 30 */ 31 #include <sys/param.h> 32 #include <sys/systm.h> 33 #include <sys/kernel.h> 34 #include <sys/fcntl.h> 35 #include <sys/bio.h> 36 #include <sys/buf.h> 37 #include <sys/mount.h> 38 #include <sys/namei.h> 39 #include <sys/vnode.h> 40 #include <sys/dirent.h> 41 #include <sys/rwlock.h> 42 #include <sys/signalvar.h> 43 #include <sys/sysctl.h> 44 #include <sys/vmmeter.h> 45 46 #include <vm/vm.h> 47 #include <vm/vm_param.h> 48 #include <vm/vm_page.h> 49 #include <vm/vm_extern.h> 50 #include <vm/vm_object.h> 51 #include <vm/vm_pager.h> 52 #include <vm/vnode_pager.h> 53 /* 54 #include <sys/ioccom.h> 55 */ 56 #include <netsmb/smb.h> 57 #include <netsmb/smb_conn.h> 58 #include <netsmb/smb_subr.h> 59 60 #include <fs/smbfs/smbfs.h> 61 #include <fs/smbfs/smbfs_node.h> 62 #include <fs/smbfs/smbfs_subr.h> 63 64 /*#define SMBFS_RWGENERIC*/ 65 66 extern uma_zone_t smbfs_pbuf_zone; 67 68 static int smbfs_fastlookup = 1; 69 70 SYSCTL_DECL(_vfs_smbfs); 71 SYSCTL_INT(_vfs_smbfs, OID_AUTO, fastlookup, CTLFLAG_RW, &smbfs_fastlookup, 0, ""); 72 73 #define DE_SIZE (sizeof(struct dirent)) 74 75 static int 76 smbfs_readvdir(struct vnode *vp, struct uio *uio, struct ucred *cred) 77 { 78 struct dirent de; 79 struct componentname cn; 80 struct smb_cred *scred; 81 struct smbfs_fctx *ctx; 82 struct vnode *newvp; 83 struct smbnode *np = VTOSMB(vp); 84 int error/*, *eofflag = ap->a_eofflag*/; 85 long offset, limit; 86 87 np = VTOSMB(vp); 88 SMBVDEBUG("dirname='%s'\n", np->n_name); 89 scred = smbfs_malloc_scred(); 90 smb_makescred(scred, uio->uio_td, cred); 91 offset = uio->uio_offset / DE_SIZE; /* offset in the directory */ 92 limit = uio->uio_resid / DE_SIZE; 93 if (uio->uio_resid < DE_SIZE || uio->uio_offset < 0) { 94 error = EINVAL; 95 goto out; 96 } 97 while (limit && offset < 2) { 98 limit--; 99 bzero((caddr_t)&de, DE_SIZE); 100 de.d_reclen = DE_SIZE; 101 de.d_fileno = (offset == 0) ? np->n_ino : 102 (np->n_parent ? np->n_parentino : 2); 103 if (de.d_fileno == 0) 104 de.d_fileno = 0x7ffffffd + offset; 105 de.d_namlen = offset + 1; 106 de.d_name[0] = '.'; 107 de.d_name[1] = '.'; 108 de.d_type = DT_DIR; 109 dirent_terminate(&de); 110 error = uiomove(&de, DE_SIZE, uio); 111 if (error) 112 goto out; 113 offset++; 114 uio->uio_offset += DE_SIZE; 115 } 116 if (limit == 0) { 117 error = 0; 118 goto out; 119 } 120 if (offset != np->n_dirofs || np->n_dirseq == NULL) { 121 SMBVDEBUG("Reopening search %ld:%ld\n", offset, np->n_dirofs); 122 if (np->n_dirseq) { 123 smbfs_findclose(np->n_dirseq, scred); 124 np->n_dirseq = NULL; 125 } 126 np->n_dirofs = 2; 127 error = smbfs_findopen(np, "*", 1, 128 SMB_FA_SYSTEM | SMB_FA_HIDDEN | SMB_FA_DIR, 129 scred, &ctx); 130 if (error) { 131 SMBVDEBUG("can not open search, error = %d", error); 132 goto out; 133 } 134 np->n_dirseq = ctx; 135 } else 136 ctx = np->n_dirseq; 137 while (np->n_dirofs < offset) { 138 error = smbfs_findnext(ctx, offset - np->n_dirofs++, scred); 139 if (error) { 140 smbfs_findclose(np->n_dirseq, scred); 141 np->n_dirseq = NULL; 142 error = ENOENT ? 0 : error; 143 goto out; 144 } 145 } 146 error = 0; 147 for (; limit; limit--, offset++) { 148 error = smbfs_findnext(ctx, limit, scred); 149 if (error) 150 break; 151 np->n_dirofs++; 152 bzero((caddr_t)&de, DE_SIZE); 153 de.d_reclen = DE_SIZE; 154 de.d_fileno = ctx->f_attr.fa_ino; 155 de.d_type = (ctx->f_attr.fa_attr & SMB_FA_DIR) ? DT_DIR : DT_REG; 156 de.d_namlen = ctx->f_nmlen; 157 bcopy(ctx->f_name, de.d_name, de.d_namlen); 158 dirent_terminate(&de); 159 if (smbfs_fastlookup) { 160 error = smbfs_nget(vp->v_mount, vp, ctx->f_name, 161 ctx->f_nmlen, &ctx->f_attr, &newvp); 162 if (!error) { 163 cn.cn_nameptr = de.d_name; 164 cn.cn_namelen = de.d_namlen; 165 cache_enter(vp, newvp, &cn); 166 vput(newvp); 167 } 168 } 169 error = uiomove(&de, DE_SIZE, uio); 170 if (error) 171 break; 172 } 173 if (error == ENOENT) 174 error = 0; 175 uio->uio_offset = offset * DE_SIZE; 176 out: 177 smbfs_free_scred(scred); 178 return error; 179 } 180 181 int 182 smbfs_readvnode(struct vnode *vp, struct uio *uiop, struct ucred *cred) 183 { 184 struct smbmount *smp = VFSTOSMBFS(vp->v_mount); 185 struct smbnode *np = VTOSMB(vp); 186 struct thread *td; 187 struct vattr vattr; 188 struct smb_cred *scred; 189 int error, lks; 190 191 /* 192 * Protect against method which is not supported for now 193 */ 194 if (uiop->uio_segflg == UIO_NOCOPY) 195 return EOPNOTSUPP; 196 197 if (vp->v_type != VREG && vp->v_type != VDIR) { 198 SMBFSERR("vn types other than VREG or VDIR are unsupported !\n"); 199 return EIO; 200 } 201 if (uiop->uio_resid == 0) 202 return 0; 203 if (uiop->uio_offset < 0) 204 return EINVAL; 205 /* if (uiop->uio_offset + uiop->uio_resid > smp->nm_maxfilesize) 206 return EFBIG;*/ 207 td = uiop->uio_td; 208 if (vp->v_type == VDIR) { 209 lks = LK_EXCLUSIVE; /* lockstatus(vp->v_vnlock); */ 210 if (lks == LK_SHARED) 211 vn_lock(vp, LK_UPGRADE | LK_RETRY); 212 error = smbfs_readvdir(vp, uiop, cred); 213 if (lks == LK_SHARED) 214 vn_lock(vp, LK_DOWNGRADE | LK_RETRY); 215 return error; 216 } 217 218 /* biosize = SSTOCN(smp->sm_share)->sc_txmax;*/ 219 if (np->n_flag & NMODIFIED) { 220 smbfs_attr_cacheremove(vp); 221 error = VOP_GETATTR(vp, &vattr, cred); 222 if (error) 223 return error; 224 np->n_mtime.tv_sec = vattr.va_mtime.tv_sec; 225 } else { 226 error = VOP_GETATTR(vp, &vattr, cred); 227 if (error) 228 return error; 229 if (np->n_mtime.tv_sec != vattr.va_mtime.tv_sec) { 230 error = smbfs_vinvalbuf(vp, td); 231 if (error) 232 return error; 233 np->n_mtime.tv_sec = vattr.va_mtime.tv_sec; 234 } 235 } 236 scred = smbfs_malloc_scred(); 237 smb_makescred(scred, td, cred); 238 error = smb_read(smp->sm_share, np->n_fid, uiop, scred); 239 smbfs_free_scred(scred); 240 return (error); 241 } 242 243 int 244 smbfs_writevnode(struct vnode *vp, struct uio *uiop, 245 struct ucred *cred, int ioflag) 246 { 247 struct smbmount *smp = VTOSMBFS(vp); 248 struct smbnode *np = VTOSMB(vp); 249 struct smb_cred *scred; 250 struct thread *td; 251 int error = 0; 252 253 if (vp->v_type != VREG) { 254 SMBERROR("vn types other than VREG unsupported !\n"); 255 return EIO; 256 } 257 SMBVDEBUG("ofs=%jd,resid=%zd\n", (intmax_t)uiop->uio_offset, 258 uiop->uio_resid); 259 if (uiop->uio_offset < 0) 260 return EINVAL; 261 /* if (uiop->uio_offset + uiop->uio_resid > smp->nm_maxfilesize) 262 return (EFBIG);*/ 263 td = uiop->uio_td; 264 if (ioflag & (IO_APPEND | IO_SYNC)) { 265 if (np->n_flag & NMODIFIED) { 266 smbfs_attr_cacheremove(vp); 267 error = smbfs_vinvalbuf(vp, td); 268 if (error) 269 return error; 270 } 271 if (ioflag & IO_APPEND) { 272 #ifdef notyet 273 /* 274 * File size can be changed by another client 275 */ 276 smbfs_attr_cacheremove(vp); 277 error = VOP_GETATTR(vp, &vattr, cred); 278 if (error) return (error); 279 #endif 280 uiop->uio_offset = np->n_size; 281 } 282 } 283 if (uiop->uio_resid == 0) 284 return 0; 285 286 if (vn_rlimit_fsize(vp, uiop, td)) 287 return (EFBIG); 288 289 scred = smbfs_malloc_scred(); 290 smb_makescred(scred, td, cred); 291 error = smb_write(smp->sm_share, np->n_fid, uiop, scred); 292 smbfs_free_scred(scred); 293 SMBVDEBUG("after: ofs=%jd,resid=%zd\n", (intmax_t)uiop->uio_offset, 294 uiop->uio_resid); 295 if (!error) { 296 if (uiop->uio_offset > np->n_size) { 297 np->n_size = uiop->uio_offset; 298 vnode_pager_setsize(vp, np->n_size); 299 } 300 } 301 return error; 302 } 303 304 /* 305 * Do an I/O operation to/from a cache block. 306 */ 307 int 308 smbfs_doio(struct vnode *vp, struct buf *bp, struct ucred *cr, struct thread *td) 309 { 310 struct smbmount *smp = VFSTOSMBFS(vp->v_mount); 311 struct smbnode *np = VTOSMB(vp); 312 struct uio *uiop; 313 struct iovec io; 314 struct smb_cred *scred; 315 int error = 0; 316 317 uiop = malloc(sizeof(struct uio), M_SMBFSDATA, M_WAITOK); 318 uiop->uio_iov = &io; 319 uiop->uio_iovcnt = 1; 320 uiop->uio_segflg = UIO_SYSSPACE; 321 uiop->uio_td = td; 322 323 scred = smbfs_malloc_scred(); 324 smb_makescred(scred, td, cr); 325 326 if (bp->b_iocmd == BIO_READ) { 327 io.iov_len = uiop->uio_resid = bp->b_bcount; 328 io.iov_base = bp->b_data; 329 uiop->uio_rw = UIO_READ; 330 switch (vp->v_type) { 331 case VREG: 332 uiop->uio_offset = ((off_t)bp->b_blkno) * DEV_BSIZE; 333 error = smb_read(smp->sm_share, np->n_fid, uiop, scred); 334 if (error) 335 break; 336 if (uiop->uio_resid) { 337 int left = uiop->uio_resid; 338 int nread = bp->b_bcount - left; 339 if (left > 0) 340 bzero((char *)bp->b_data + nread, left); 341 } 342 break; 343 default: 344 printf("smbfs_doio: type %x unexpected\n",vp->v_type); 345 break; 346 } 347 if (error) { 348 bp->b_error = error; 349 bp->b_ioflags |= BIO_ERROR; 350 } 351 } else { /* write */ 352 if (((bp->b_blkno * DEV_BSIZE) + bp->b_dirtyend) > np->n_size) 353 bp->b_dirtyend = np->n_size - (bp->b_blkno * DEV_BSIZE); 354 355 if (bp->b_dirtyend > bp->b_dirtyoff) { 356 io.iov_len = uiop->uio_resid = bp->b_dirtyend - bp->b_dirtyoff; 357 uiop->uio_offset = ((off_t)bp->b_blkno) * DEV_BSIZE + bp->b_dirtyoff; 358 io.iov_base = (char *)bp->b_data + bp->b_dirtyoff; 359 uiop->uio_rw = UIO_WRITE; 360 error = smb_write(smp->sm_share, np->n_fid, uiop, scred); 361 362 /* 363 * For an interrupted write, the buffer is still valid 364 * and the write hasn't been pushed to the server yet, 365 * so we can't set BIO_ERROR and report the interruption 366 * by setting B_EINTR. For the B_ASYNC case, B_EINTR 367 * is not relevant, so the rpc attempt is essentially 368 * a noop. For the case of a V3 write rpc not being 369 * committed to stable storage, the block is still 370 * dirty and requires either a commit rpc or another 371 * write rpc with iomode == NFSV3WRITE_FILESYNC before 372 * the block is reused. This is indicated by setting 373 * the B_DELWRI and B_NEEDCOMMIT flags. 374 */ 375 if (error == EINTR 376 || (!error && (bp->b_flags & B_NEEDCOMMIT))) { 377 bp->b_flags &= ~(B_INVAL|B_NOCACHE); 378 if ((bp->b_flags & B_ASYNC) == 0) 379 bp->b_flags |= B_EINTR; 380 if ((bp->b_flags & B_PAGING) == 0) { 381 bdirty(bp); 382 bp->b_flags &= ~B_DONE; 383 } 384 if ((bp->b_flags & B_ASYNC) == 0) 385 bp->b_flags |= B_EINTR; 386 } else { 387 if (error) { 388 bp->b_ioflags |= BIO_ERROR; 389 bp->b_error = error; 390 } 391 bp->b_dirtyoff = bp->b_dirtyend = 0; 392 } 393 } else { 394 bp->b_resid = 0; 395 bufdone(bp); 396 free(uiop, M_SMBFSDATA); 397 smbfs_free_scred(scred); 398 return 0; 399 } 400 } 401 bp->b_resid = uiop->uio_resid; 402 bufdone(bp); 403 free(uiop, M_SMBFSDATA); 404 smbfs_free_scred(scred); 405 return error; 406 } 407 408 /* 409 * Vnode op for VM getpages. 410 * Wish wish .... get rid from multiple IO routines 411 */ 412 int 413 smbfs_getpages(ap) 414 struct vop_getpages_args /* { 415 struct vnode *a_vp; 416 vm_page_t *a_m; 417 int a_count; 418 int a_reqpage; 419 } */ *ap; 420 { 421 #ifdef SMBFS_RWGENERIC 422 return vop_stdgetpages(ap); 423 #else 424 int i, error, nextoff, size, toff, npages, count; 425 struct uio uio; 426 struct iovec iov; 427 vm_offset_t kva; 428 struct buf *bp; 429 struct vnode *vp; 430 struct thread *td; 431 struct ucred *cred; 432 struct smbmount *smp; 433 struct smbnode *np; 434 struct smb_cred *scred; 435 vm_object_t object; 436 vm_page_t *pages; 437 438 vp = ap->a_vp; 439 if ((object = vp->v_object) == NULL) { 440 printf("smbfs_getpages: called with non-merged cache vnode??\n"); 441 return VM_PAGER_ERROR; 442 } 443 444 td = curthread; /* XXX */ 445 cred = td->td_ucred; /* XXX */ 446 np = VTOSMB(vp); 447 smp = VFSTOSMBFS(vp->v_mount); 448 pages = ap->a_m; 449 npages = ap->a_count; 450 451 /* 452 * If the requested page is partially valid, just return it and 453 * allow the pager to zero-out the blanks. Partially valid pages 454 * can only occur at the file EOF. 455 * 456 * XXXGL: is that true for SMB filesystem? 457 */ 458 VM_OBJECT_WLOCK(object); 459 if (!vm_page_none_valid(pages[npages - 1]) && --npages == 0) 460 goto out; 461 VM_OBJECT_WUNLOCK(object); 462 463 scred = smbfs_malloc_scred(); 464 smb_makescred(scred, td, cred); 465 466 bp = uma_zalloc(smbfs_pbuf_zone, M_WAITOK); 467 468 kva = (vm_offset_t) bp->b_data; 469 pmap_qenter(kva, pages, npages); 470 VM_CNT_INC(v_vnodein); 471 VM_CNT_ADD(v_vnodepgsin, npages); 472 473 count = npages << PAGE_SHIFT; 474 iov.iov_base = (caddr_t) kva; 475 iov.iov_len = count; 476 uio.uio_iov = &iov; 477 uio.uio_iovcnt = 1; 478 uio.uio_offset = IDX_TO_OFF(pages[0]->pindex); 479 uio.uio_resid = count; 480 uio.uio_segflg = UIO_SYSSPACE; 481 uio.uio_rw = UIO_READ; 482 uio.uio_td = td; 483 484 error = smb_read(smp->sm_share, np->n_fid, &uio, scred); 485 smbfs_free_scred(scred); 486 pmap_qremove(kva, npages); 487 488 uma_zfree(smbfs_pbuf_zone, bp); 489 490 if (error && (uio.uio_resid == count)) { 491 printf("smbfs_getpages: error %d\n",error); 492 return VM_PAGER_ERROR; 493 } 494 495 size = count - uio.uio_resid; 496 497 VM_OBJECT_WLOCK(object); 498 for (i = 0, toff = 0; i < npages; i++, toff = nextoff) { 499 vm_page_t m; 500 nextoff = toff + PAGE_SIZE; 501 m = pages[i]; 502 503 if (nextoff <= size) { 504 /* 505 * Read operation filled an entire page 506 */ 507 vm_page_valid(m); 508 KASSERT(m->dirty == 0, 509 ("smbfs_getpages: page %p is dirty", m)); 510 } else if (size > toff) { 511 /* 512 * Read operation filled a partial page. 513 */ 514 vm_page_invalid(m); 515 vm_page_set_valid_range(m, 0, size - toff); 516 KASSERT(m->dirty == 0, 517 ("smbfs_getpages: page %p is dirty", m)); 518 } else { 519 /* 520 * Read operation was short. If no error occurred 521 * we may have hit a zero-fill section. We simply 522 * leave valid set to 0. 523 */ 524 ; 525 } 526 } 527 out: 528 VM_OBJECT_WUNLOCK(object); 529 if (ap->a_rbehind) 530 *ap->a_rbehind = 0; 531 if (ap->a_rahead) 532 *ap->a_rahead = 0; 533 return (VM_PAGER_OK); 534 #endif /* SMBFS_RWGENERIC */ 535 } 536 537 /* 538 * Vnode op for VM putpages. 539 * possible bug: all IO done in sync mode 540 * Note that vop_close always invalidate pages before close, so it's 541 * not necessary to open vnode. 542 */ 543 int 544 smbfs_putpages(ap) 545 struct vop_putpages_args /* { 546 struct vnode *a_vp; 547 vm_page_t *a_m; 548 int a_count; 549 int a_sync; 550 int *a_rtvals; 551 } */ *ap; 552 { 553 int error; 554 struct vnode *vp = ap->a_vp; 555 struct thread *td; 556 struct ucred *cred; 557 558 #ifdef SMBFS_RWGENERIC 559 td = curthread; /* XXX */ 560 cred = td->td_ucred; /* XXX */ 561 VOP_OPEN(vp, FWRITE, cred, td, NULL); 562 error = vop_stdputpages(ap); 563 VOP_CLOSE(vp, FWRITE, cred, td); 564 return error; 565 #else 566 struct uio uio; 567 struct iovec iov; 568 vm_offset_t kva; 569 struct buf *bp; 570 int i, npages, count; 571 int *rtvals; 572 struct smbmount *smp; 573 struct smbnode *np; 574 struct smb_cred *scred; 575 vm_page_t *pages; 576 577 td = curthread; /* XXX */ 578 cred = td->td_ucred; /* XXX */ 579 /* VOP_OPEN(vp, FWRITE, cred, td, NULL);*/ 580 np = VTOSMB(vp); 581 smp = VFSTOSMBFS(vp->v_mount); 582 pages = ap->a_m; 583 count = ap->a_count; 584 rtvals = ap->a_rtvals; 585 npages = btoc(count); 586 587 for (i = 0; i < npages; i++) { 588 rtvals[i] = VM_PAGER_ERROR; 589 } 590 591 bp = uma_zalloc(smbfs_pbuf_zone, M_WAITOK); 592 593 kva = (vm_offset_t) bp->b_data; 594 pmap_qenter(kva, pages, npages); 595 VM_CNT_INC(v_vnodeout); 596 VM_CNT_ADD(v_vnodepgsout, count); 597 598 iov.iov_base = (caddr_t) kva; 599 iov.iov_len = count; 600 uio.uio_iov = &iov; 601 uio.uio_iovcnt = 1; 602 uio.uio_offset = IDX_TO_OFF(pages[0]->pindex); 603 uio.uio_resid = count; 604 uio.uio_segflg = UIO_SYSSPACE; 605 uio.uio_rw = UIO_WRITE; 606 uio.uio_td = td; 607 SMBVDEBUG("ofs=%jd,resid=%zd\n", (intmax_t)uio.uio_offset, 608 uio.uio_resid); 609 610 scred = smbfs_malloc_scred(); 611 smb_makescred(scred, td, cred); 612 error = smb_write(smp->sm_share, np->n_fid, &uio, scred); 613 smbfs_free_scred(scred); 614 /* VOP_CLOSE(vp, FWRITE, cred, td);*/ 615 SMBVDEBUG("paged write done: %d\n", error); 616 617 pmap_qremove(kva, npages); 618 619 uma_zfree(smbfs_pbuf_zone, bp); 620 621 if (error == 0) { 622 vnode_pager_undirty_pages(pages, rtvals, count - uio.uio_resid, 623 npages * PAGE_SIZE, npages * PAGE_SIZE); 624 } 625 return (rtvals[0]); 626 #endif /* SMBFS_RWGENERIC */ 627 } 628 629 /* 630 * Flush and invalidate all dirty buffers. If another process is already 631 * doing the flush, just wait for completion. 632 */ 633 int 634 smbfs_vinvalbuf(struct vnode *vp, struct thread *td) 635 { 636 struct smbnode *np = VTOSMB(vp); 637 int error = 0; 638 639 if (VN_IS_DOOMED(vp)) 640 return 0; 641 642 while (np->n_flag & NFLUSHINPROG) { 643 np->n_flag |= NFLUSHWANT; 644 error = tsleep(&np->n_flag, PRIBIO + 2, "smfsvinv", 2 * hz); 645 error = smb_td_intr(td); 646 if (error == EINTR) 647 return EINTR; 648 } 649 np->n_flag |= NFLUSHINPROG; 650 651 if (vp->v_bufobj.bo_object != NULL) { 652 VM_OBJECT_WLOCK(vp->v_bufobj.bo_object); 653 vm_object_page_clean(vp->v_bufobj.bo_object, 0, 0, OBJPC_SYNC); 654 VM_OBJECT_WUNLOCK(vp->v_bufobj.bo_object); 655 } 656 657 error = vinvalbuf(vp, V_SAVE, PCATCH, 0); 658 while (error) { 659 if (error == ERESTART || error == EINTR) { 660 np->n_flag &= ~NFLUSHINPROG; 661 if (np->n_flag & NFLUSHWANT) { 662 np->n_flag &= ~NFLUSHWANT; 663 wakeup(&np->n_flag); 664 } 665 return EINTR; 666 } 667 error = vinvalbuf(vp, V_SAVE, PCATCH, 0); 668 } 669 np->n_flag &= ~(NMODIFIED | NFLUSHINPROG); 670 if (np->n_flag & NFLUSHWANT) { 671 np->n_flag &= ~NFLUSHWANT; 672 wakeup(&np->n_flag); 673 } 674 return (error); 675 } 676