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 74 #define DE_SIZE (sizeof(struct dirent)) 75 76 static int 77 smbfs_readvdir(struct vnode *vp, struct uio *uio, struct ucred *cred) 78 { 79 struct dirent de; 80 struct componentname cn; 81 struct smb_cred *scred; 82 struct smbfs_fctx *ctx; 83 struct vnode *newvp; 84 struct smbnode *np = VTOSMB(vp); 85 int error/*, *eofflag = ap->a_eofflag*/; 86 long offset, limit; 87 88 np = VTOSMB(vp); 89 SMBVDEBUG("dirname='%s'\n", np->n_name); 90 scred = smbfs_malloc_scred(); 91 smb_makescred(scred, uio->uio_td, cred); 92 offset = uio->uio_offset / DE_SIZE; /* offset in the directory */ 93 limit = uio->uio_resid / DE_SIZE; 94 if (uio->uio_resid < DE_SIZE || uio->uio_offset < 0) { 95 error = EINVAL; 96 goto out; 97 } 98 while (limit && offset < 2) { 99 limit--; 100 bzero((caddr_t)&de, DE_SIZE); 101 de.d_reclen = DE_SIZE; 102 de.d_fileno = (offset == 0) ? np->n_ino : 103 (np->n_parent ? np->n_parentino : 2); 104 if (de.d_fileno == 0) 105 de.d_fileno = 0x7ffffffd + offset; 106 de.d_namlen = offset + 1; 107 de.d_name[0] = '.'; 108 de.d_name[1] = '.'; 109 de.d_type = DT_DIR; 110 dirent_terminate(&de); 111 error = uiomove(&de, DE_SIZE, uio); 112 if (error) 113 goto out; 114 offset++; 115 uio->uio_offset += DE_SIZE; 116 } 117 if (limit == 0) { 118 error = 0; 119 goto out; 120 } 121 if (offset != np->n_dirofs || np->n_dirseq == NULL) { 122 SMBVDEBUG("Reopening search %ld:%ld\n", offset, np->n_dirofs); 123 if (np->n_dirseq) { 124 smbfs_findclose(np->n_dirseq, scred); 125 np->n_dirseq = NULL; 126 } 127 np->n_dirofs = 2; 128 error = smbfs_findopen(np, "*", 1, 129 SMB_FA_SYSTEM | SMB_FA_HIDDEN | SMB_FA_DIR, 130 scred, &ctx); 131 if (error) { 132 SMBVDEBUG("can not open search, error = %d", error); 133 goto out; 134 } 135 np->n_dirseq = ctx; 136 } else 137 ctx = np->n_dirseq; 138 while (np->n_dirofs < offset) { 139 error = smbfs_findnext(ctx, offset - np->n_dirofs++, scred); 140 if (error) { 141 smbfs_findclose(np->n_dirseq, scred); 142 np->n_dirseq = NULL; 143 error = ENOENT ? 0 : error; 144 goto out; 145 } 146 } 147 error = 0; 148 for (; limit; limit--, offset++) { 149 error = smbfs_findnext(ctx, limit, scred); 150 if (error) 151 break; 152 np->n_dirofs++; 153 bzero((caddr_t)&de, DE_SIZE); 154 de.d_reclen = DE_SIZE; 155 de.d_fileno = ctx->f_attr.fa_ino; 156 de.d_type = (ctx->f_attr.fa_attr & SMB_FA_DIR) ? DT_DIR : DT_REG; 157 de.d_namlen = ctx->f_nmlen; 158 bcopy(ctx->f_name, de.d_name, de.d_namlen); 159 dirent_terminate(&de); 160 if (smbfs_fastlookup) { 161 error = smbfs_nget(vp->v_mount, vp, ctx->f_name, 162 ctx->f_nmlen, &ctx->f_attr, &newvp); 163 if (!error) { 164 cn.cn_nameptr = de.d_name; 165 cn.cn_namelen = de.d_namlen; 166 cache_enter(vp, newvp, &cn); 167 vput(newvp); 168 } 169 } 170 error = uiomove(&de, DE_SIZE, uio); 171 if (error) 172 break; 173 } 174 if (error == ENOENT) 175 error = 0; 176 uio->uio_offset = offset * DE_SIZE; 177 out: 178 smbfs_free_scred(scred); 179 return error; 180 } 181 182 int 183 smbfs_readvnode(struct vnode *vp, struct uio *uiop, struct ucred *cred) 184 { 185 struct smbmount *smp = VFSTOSMBFS(vp->v_mount); 186 struct smbnode *np = VTOSMB(vp); 187 struct thread *td; 188 struct vattr vattr; 189 struct smb_cred *scred; 190 int error, lks; 191 192 /* 193 * Protect against method which is not supported for now 194 */ 195 if (uiop->uio_segflg == UIO_NOCOPY) 196 return EOPNOTSUPP; 197 198 if (vp->v_type != VREG && vp->v_type != VDIR) { 199 SMBFSERR("vn types other than VREG or VDIR are unsupported !\n"); 200 return EIO; 201 } 202 if (uiop->uio_resid == 0) 203 return 0; 204 if (uiop->uio_offset < 0) 205 return EINVAL; 206 /* if (uiop->uio_offset + uiop->uio_resid > smp->nm_maxfilesize) 207 return EFBIG;*/ 208 td = uiop->uio_td; 209 if (vp->v_type == VDIR) { 210 lks = LK_EXCLUSIVE; /* lockstatus(vp->v_vnlock); */ 211 if (lks == LK_SHARED) 212 vn_lock(vp, LK_UPGRADE | LK_RETRY); 213 error = smbfs_readvdir(vp, uiop, cred); 214 if (lks == LK_SHARED) 215 vn_lock(vp, LK_DOWNGRADE | LK_RETRY); 216 return error; 217 } 218 219 /* biosize = SSTOCN(smp->sm_share)->sc_txmax;*/ 220 if (np->n_flag & NMODIFIED) { 221 smbfs_attr_cacheremove(vp); 222 error = VOP_GETATTR(vp, &vattr, cred); 223 if (error) 224 return error; 225 np->n_mtime.tv_sec = vattr.va_mtime.tv_sec; 226 } else { 227 error = VOP_GETATTR(vp, &vattr, cred); 228 if (error) 229 return error; 230 if (np->n_mtime.tv_sec != vattr.va_mtime.tv_sec) { 231 error = smbfs_vinvalbuf(vp, td); 232 if (error) 233 return error; 234 np->n_mtime.tv_sec = vattr.va_mtime.tv_sec; 235 } 236 } 237 scred = smbfs_malloc_scred(); 238 smb_makescred(scred, td, cred); 239 error = smb_read(smp->sm_share, np->n_fid, uiop, scred); 240 smbfs_free_scred(scred); 241 return (error); 242 } 243 244 int 245 smbfs_writevnode(struct vnode *vp, struct uio *uiop, 246 struct ucred *cred, int ioflag) 247 { 248 struct smbmount *smp = VTOSMBFS(vp); 249 struct smbnode *np = VTOSMB(vp); 250 struct smb_cred *scred; 251 struct thread *td; 252 int error = 0; 253 254 if (vp->v_type != VREG) { 255 SMBERROR("vn types other than VREG unsupported !\n"); 256 return EIO; 257 } 258 SMBVDEBUG("ofs=%jd,resid=%zd\n", (intmax_t)uiop->uio_offset, 259 uiop->uio_resid); 260 if (uiop->uio_offset < 0) 261 return EINVAL; 262 /* if (uiop->uio_offset + uiop->uio_resid > smp->nm_maxfilesize) 263 return (EFBIG);*/ 264 td = uiop->uio_td; 265 if (ioflag & (IO_APPEND | IO_SYNC)) { 266 if (np->n_flag & NMODIFIED) { 267 smbfs_attr_cacheremove(vp); 268 error = smbfs_vinvalbuf(vp, td); 269 if (error) 270 return error; 271 } 272 if (ioflag & IO_APPEND) { 273 #ifdef notyet 274 /* 275 * File size can be changed by another client 276 */ 277 smbfs_attr_cacheremove(vp); 278 error = VOP_GETATTR(vp, &vattr, cred); 279 if (error) return (error); 280 #endif 281 uiop->uio_offset = np->n_size; 282 } 283 } 284 if (uiop->uio_resid == 0) 285 return 0; 286 287 if (vn_rlimit_fsize(vp, uiop, td)) 288 return (EFBIG); 289 290 scred = smbfs_malloc_scred(); 291 smb_makescred(scred, td, cred); 292 error = smb_write(smp->sm_share, np->n_fid, uiop, scred); 293 smbfs_free_scred(scred); 294 SMBVDEBUG("after: ofs=%jd,resid=%zd\n", (intmax_t)uiop->uio_offset, 295 uiop->uio_resid); 296 if (!error) { 297 if (uiop->uio_offset > np->n_size) { 298 np->n_size = uiop->uio_offset; 299 vnode_pager_setsize(vp, np->n_size); 300 } 301 } 302 return error; 303 } 304 305 /* 306 * Do an I/O operation to/from a cache block. 307 */ 308 int 309 smbfs_doio(struct vnode *vp, struct buf *bp, struct ucred *cr, struct thread *td) 310 { 311 struct smbmount *smp = VFSTOSMBFS(vp->v_mount); 312 struct smbnode *np = VTOSMB(vp); 313 struct uio *uiop; 314 struct iovec io; 315 struct smb_cred *scred; 316 int error = 0; 317 318 uiop = malloc(sizeof(struct uio), M_SMBFSDATA, M_WAITOK); 319 uiop->uio_iov = &io; 320 uiop->uio_iovcnt = 1; 321 uiop->uio_segflg = UIO_SYSSPACE; 322 uiop->uio_td = td; 323 324 scred = smbfs_malloc_scred(); 325 smb_makescred(scred, td, cr); 326 327 if (bp->b_iocmd == BIO_READ) { 328 io.iov_len = uiop->uio_resid = bp->b_bcount; 329 io.iov_base = bp->b_data; 330 uiop->uio_rw = UIO_READ; 331 switch (vp->v_type) { 332 case VREG: 333 uiop->uio_offset = ((off_t)bp->b_blkno) * DEV_BSIZE; 334 error = smb_read(smp->sm_share, np->n_fid, uiop, scred); 335 if (error) 336 break; 337 if (uiop->uio_resid) { 338 int left = uiop->uio_resid; 339 int nread = bp->b_bcount - left; 340 if (left > 0) 341 bzero((char *)bp->b_data + nread, left); 342 } 343 break; 344 default: 345 printf("smbfs_doio: type %x unexpected\n",vp->v_type); 346 break; 347 } 348 if (error) { 349 bp->b_error = error; 350 bp->b_ioflags |= BIO_ERROR; 351 } 352 } else { /* write */ 353 if (((bp->b_blkno * DEV_BSIZE) + bp->b_dirtyend) > np->n_size) 354 bp->b_dirtyend = np->n_size - (bp->b_blkno * DEV_BSIZE); 355 356 if (bp->b_dirtyend > bp->b_dirtyoff) { 357 io.iov_len = uiop->uio_resid = bp->b_dirtyend - bp->b_dirtyoff; 358 uiop->uio_offset = ((off_t)bp->b_blkno) * DEV_BSIZE + bp->b_dirtyoff; 359 io.iov_base = (char *)bp->b_data + bp->b_dirtyoff; 360 uiop->uio_rw = UIO_WRITE; 361 error = smb_write(smp->sm_share, np->n_fid, uiop, scred); 362 363 /* 364 * For an interrupted write, the buffer is still valid 365 * and the write hasn't been pushed to the server yet, 366 * so we can't set BIO_ERROR and report the interruption 367 * by setting B_EINTR. For the B_ASYNC case, B_EINTR 368 * is not relevant, so the rpc attempt is essentially 369 * a noop. For the case of a V3 write rpc not being 370 * committed to stable storage, the block is still 371 * dirty and requires either a commit rpc or another 372 * write rpc with iomode == NFSV3WRITE_FILESYNC before 373 * the block is reused. This is indicated by setting 374 * the B_DELWRI and B_NEEDCOMMIT flags. 375 */ 376 if (error == EINTR 377 || (!error && (bp->b_flags & B_NEEDCOMMIT))) { 378 bp->b_flags &= ~(B_INVAL|B_NOCACHE); 379 if ((bp->b_flags & B_ASYNC) == 0) 380 bp->b_flags |= B_EINTR; 381 if ((bp->b_flags & B_PAGING) == 0) { 382 bdirty(bp); 383 bp->b_flags &= ~B_DONE; 384 } 385 if ((bp->b_flags & B_ASYNC) == 0) 386 bp->b_flags |= B_EINTR; 387 } else { 388 if (error) { 389 bp->b_ioflags |= BIO_ERROR; 390 bp->b_error = error; 391 } 392 bp->b_dirtyoff = bp->b_dirtyend = 0; 393 } 394 } else { 395 bp->b_resid = 0; 396 bufdone(bp); 397 free(uiop, M_SMBFSDATA); 398 smbfs_free_scred(scred); 399 return 0; 400 } 401 } 402 bp->b_resid = uiop->uio_resid; 403 bufdone(bp); 404 free(uiop, M_SMBFSDATA); 405 smbfs_free_scred(scred); 406 return error; 407 } 408 409 /* 410 * Vnode op for VM getpages. 411 * Wish wish .... get rid from multiple IO routines 412 */ 413 int 414 smbfs_getpages(ap) 415 struct vop_getpages_args /* { 416 struct vnode *a_vp; 417 vm_page_t *a_m; 418 int a_count; 419 int a_reqpage; 420 } */ *ap; 421 { 422 #ifdef SMBFS_RWGENERIC 423 return vop_stdgetpages(ap); 424 #else 425 int i, error, nextoff, size, toff, npages, count; 426 struct uio uio; 427 struct iovec iov; 428 vm_offset_t kva; 429 struct buf *bp; 430 struct vnode *vp; 431 struct thread *td; 432 struct ucred *cred; 433 struct smbmount *smp; 434 struct smbnode *np; 435 struct smb_cred *scred; 436 vm_object_t object; 437 vm_page_t *pages; 438 439 vp = ap->a_vp; 440 if ((object = vp->v_object) == NULL) { 441 printf("smbfs_getpages: called with non-merged cache vnode??\n"); 442 return VM_PAGER_ERROR; 443 } 444 445 td = curthread; /* XXX */ 446 cred = td->td_ucred; /* XXX */ 447 np = VTOSMB(vp); 448 smp = VFSTOSMBFS(vp->v_mount); 449 pages = ap->a_m; 450 npages = ap->a_count; 451 452 /* 453 * If the requested page is partially valid, just return it and 454 * allow the pager to zero-out the blanks. Partially valid pages 455 * can only occur at the file EOF. 456 * 457 * XXXGL: is that true for SMB filesystem? 458 */ 459 VM_OBJECT_WLOCK(object); 460 if (!vm_page_none_valid(pages[npages - 1]) && --npages == 0) 461 goto out; 462 VM_OBJECT_WUNLOCK(object); 463 464 scred = smbfs_malloc_scred(); 465 smb_makescred(scred, td, cred); 466 467 bp = uma_zalloc(smbfs_pbuf_zone, M_WAITOK); 468 469 kva = (vm_offset_t) bp->b_data; 470 pmap_qenter(kva, pages, npages); 471 VM_CNT_INC(v_vnodein); 472 VM_CNT_ADD(v_vnodepgsin, npages); 473 474 count = npages << PAGE_SHIFT; 475 iov.iov_base = (caddr_t) kva; 476 iov.iov_len = count; 477 uio.uio_iov = &iov; 478 uio.uio_iovcnt = 1; 479 uio.uio_offset = IDX_TO_OFF(pages[0]->pindex); 480 uio.uio_resid = count; 481 uio.uio_segflg = UIO_SYSSPACE; 482 uio.uio_rw = UIO_READ; 483 uio.uio_td = td; 484 485 error = smb_read(smp->sm_share, np->n_fid, &uio, scred); 486 smbfs_free_scred(scred); 487 pmap_qremove(kva, npages); 488 489 uma_zfree(smbfs_pbuf_zone, bp); 490 491 if (error && (uio.uio_resid == count)) { 492 printf("smbfs_getpages: error %d\n",error); 493 return VM_PAGER_ERROR; 494 } 495 496 size = count - uio.uio_resid; 497 498 VM_OBJECT_WLOCK(object); 499 for (i = 0, toff = 0; i < npages; i++, toff = nextoff) { 500 vm_page_t m; 501 nextoff = toff + PAGE_SIZE; 502 m = pages[i]; 503 504 if (nextoff <= size) { 505 /* 506 * Read operation filled an entire page 507 */ 508 vm_page_valid(m); 509 KASSERT(m->dirty == 0, 510 ("smbfs_getpages: page %p is dirty", m)); 511 } else if (size > toff) { 512 /* 513 * Read operation filled a partial page. 514 */ 515 vm_page_invalid(m); 516 vm_page_set_valid_range(m, 0, size - toff); 517 KASSERT(m->dirty == 0, 518 ("smbfs_getpages: page %p is dirty", m)); 519 } else { 520 /* 521 * Read operation was short. If no error occurred 522 * we may have hit a zero-fill section. We simply 523 * leave valid set to 0. 524 */ 525 ; 526 } 527 } 528 out: 529 VM_OBJECT_WUNLOCK(object); 530 if (ap->a_rbehind) 531 *ap->a_rbehind = 0; 532 if (ap->a_rahead) 533 *ap->a_rahead = 0; 534 return (VM_PAGER_OK); 535 #endif /* SMBFS_RWGENERIC */ 536 } 537 538 /* 539 * Vnode op for VM putpages. 540 * possible bug: all IO done in sync mode 541 * Note that vop_close always invalidate pages before close, so it's 542 * not necessary to open vnode. 543 */ 544 int 545 smbfs_putpages(ap) 546 struct vop_putpages_args /* { 547 struct vnode *a_vp; 548 vm_page_t *a_m; 549 int a_count; 550 int a_sync; 551 int *a_rtvals; 552 } */ *ap; 553 { 554 int error; 555 struct vnode *vp = ap->a_vp; 556 struct thread *td; 557 struct ucred *cred; 558 559 #ifdef SMBFS_RWGENERIC 560 td = curthread; /* XXX */ 561 cred = td->td_ucred; /* XXX */ 562 VOP_OPEN(vp, FWRITE, cred, td, NULL); 563 error = vop_stdputpages(ap); 564 VOP_CLOSE(vp, FWRITE, cred, td); 565 return error; 566 #else 567 struct uio uio; 568 struct iovec iov; 569 vm_offset_t kva; 570 struct buf *bp; 571 int i, npages, count; 572 int *rtvals; 573 struct smbmount *smp; 574 struct smbnode *np; 575 struct smb_cred *scred; 576 vm_page_t *pages; 577 578 td = curthread; /* XXX */ 579 cred = td->td_ucred; /* XXX */ 580 /* VOP_OPEN(vp, FWRITE, cred, td, NULL);*/ 581 np = VTOSMB(vp); 582 smp = VFSTOSMBFS(vp->v_mount); 583 pages = ap->a_m; 584 count = ap->a_count; 585 rtvals = ap->a_rtvals; 586 npages = btoc(count); 587 588 for (i = 0; i < npages; i++) { 589 rtvals[i] = VM_PAGER_ERROR; 590 } 591 592 bp = uma_zalloc(smbfs_pbuf_zone, M_WAITOK); 593 594 kva = (vm_offset_t) bp->b_data; 595 pmap_qenter(kva, pages, npages); 596 VM_CNT_INC(v_vnodeout); 597 VM_CNT_ADD(v_vnodepgsout, count); 598 599 iov.iov_base = (caddr_t) kva; 600 iov.iov_len = count; 601 uio.uio_iov = &iov; 602 uio.uio_iovcnt = 1; 603 uio.uio_offset = IDX_TO_OFF(pages[0]->pindex); 604 uio.uio_resid = count; 605 uio.uio_segflg = UIO_SYSSPACE; 606 uio.uio_rw = UIO_WRITE; 607 uio.uio_td = td; 608 SMBVDEBUG("ofs=%jd,resid=%zd\n", (intmax_t)uio.uio_offset, 609 uio.uio_resid); 610 611 scred = smbfs_malloc_scred(); 612 smb_makescred(scred, td, cred); 613 error = smb_write(smp->sm_share, np->n_fid, &uio, scred); 614 smbfs_free_scred(scred); 615 /* VOP_CLOSE(vp, FWRITE, cred, td);*/ 616 SMBVDEBUG("paged write done: %d\n", error); 617 618 pmap_qremove(kva, npages); 619 620 uma_zfree(smbfs_pbuf_zone, bp); 621 622 if (error == 0) { 623 vnode_pager_undirty_pages(pages, rtvals, count - uio.uio_resid, 624 npages * PAGE_SIZE, npages * PAGE_SIZE); 625 } 626 return (rtvals[0]); 627 #endif /* SMBFS_RWGENERIC */ 628 } 629 630 /* 631 * Flush and invalidate all dirty buffers. If another process is already 632 * doing the flush, just wait for completion. 633 */ 634 int 635 smbfs_vinvalbuf(struct vnode *vp, struct thread *td) 636 { 637 struct smbnode *np = VTOSMB(vp); 638 int error = 0; 639 640 if (VN_IS_DOOMED(vp)) 641 return 0; 642 643 while (np->n_flag & NFLUSHINPROG) { 644 np->n_flag |= NFLUSHWANT; 645 error = tsleep(&np->n_flag, PRIBIO + 2, "smfsvinv", 2 * hz); 646 error = smb_td_intr(td); 647 if (error == EINTR) 648 return EINTR; 649 } 650 np->n_flag |= NFLUSHINPROG; 651 652 if (vp->v_bufobj.bo_object != NULL) { 653 VM_OBJECT_WLOCK(vp->v_bufobj.bo_object); 654 vm_object_page_clean(vp->v_bufobj.bo_object, 0, 0, OBJPC_SYNC); 655 VM_OBJECT_WUNLOCK(vp->v_bufobj.bo_object); 656 } 657 658 error = vinvalbuf(vp, V_SAVE, PCATCH, 0); 659 while (error) { 660 if (error == ERESTART || error == EINTR) { 661 np->n_flag &= ~NFLUSHINPROG; 662 if (np->n_flag & NFLUSHWANT) { 663 np->n_flag &= ~NFLUSHWANT; 664 wakeup(&np->n_flag); 665 } 666 return EINTR; 667 } 668 error = vinvalbuf(vp, V_SAVE, PCATCH, 0); 669 } 670 np->n_flag &= ~(NMODIFIED | NFLUSHINPROG); 671 if (np->n_flag & NFLUSHWANT) { 672 np->n_flag &= ~NFLUSHWANT; 673 wakeup(&np->n_flag); 674 } 675 return (error); 676 } 677