1/*- 2 * Copyright (c) 2000-2001 Boris Popov 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 * 26 * $FreeBSD: stable/11/sys/fs/smbfs/smbfs_io.c 341074 2018-11-27 16:51:18Z markj $ 27 * 28 */ 29#include <sys/param.h> 30#include <sys/systm.h> 31#include <sys/kernel.h> 32#include <sys/fcntl.h> 33#include <sys/bio.h> 34#include <sys/buf.h> 35#include <sys/mount.h> 36#include <sys/namei.h> 37#include <sys/vnode.h> 38#include <sys/dirent.h> 39#include <sys/rwlock.h> 40#include <sys/signalvar.h> 41#include <sys/sysctl.h> 42#include <sys/vmmeter.h> 43 44#include <vm/vm.h> 45#include <vm/vm_param.h> 46#include <vm/vm_page.h> 47#include <vm/vm_extern.h> 48#include <vm/vm_object.h> 49#include <vm/vm_pager.h> 50#include <vm/vnode_pager.h> 51/* 52#include <sys/ioccom.h> 53*/ 54#include <netsmb/smb.h> 55#include <netsmb/smb_conn.h> 56#include <netsmb/smb_subr.h> 57 58#include <fs/smbfs/smbfs.h> 59#include <fs/smbfs/smbfs_node.h> 60#include <fs/smbfs/smbfs_subr.h> 61 62/*#define SMBFS_RWGENERIC*/ 63 64extern int smbfs_pbuf_freecnt; 65 66static int smbfs_fastlookup = 1; 67 68SYSCTL_DECL(_vfs_smbfs); 69SYSCTL_INT(_vfs_smbfs, OID_AUTO, fastlookup, CTLFLAG_RW, &smbfs_fastlookup, 0, ""); 70 71 72#define DE_SIZE (sizeof(struct dirent)) 73 74static int 75smbfs_readvdir(struct vnode *vp, struct uio *uio, struct ucred *cred) 76{ 77 struct dirent de; 78 struct componentname cn; 79 struct smb_cred *scred; 80 struct smbfs_fctx *ctx; 81 struct vnode *newvp; 82 struct smbnode *np = VTOSMB(vp); 83 int error/*, *eofflag = ap->a_eofflag*/; 84 long offset, limit; 85 86 np = VTOSMB(vp); 87 SMBVDEBUG("dirname='%s'\n", np->n_name); 88 scred = smbfs_malloc_scred(); 89 smb_makescred(scred, uio->uio_td, cred); 90 offset = uio->uio_offset / DE_SIZE; /* offset in the directory */ 91 limit = uio->uio_resid / DE_SIZE; 92 if (uio->uio_resid < DE_SIZE || uio->uio_offset < 0) { 93 error = EINVAL; 94 goto out; 95 } 96 while (limit && offset < 2) { 97 limit--; 98 bzero((caddr_t)&de, DE_SIZE); 99 de.d_reclen = DE_SIZE; 100 de.d_fileno = (offset == 0) ? np->n_ino : 101 (np->n_parent ? np->n_parentino : 2); 102 if (de.d_fileno == 0) 103 de.d_fileno = 0x7ffffffd + offset; 104 de.d_namlen = offset + 1; 105 de.d_name[0] = '.'; 106 de.d_name[1] = '.'; 107 de.d_type = DT_DIR; 108 dirent_terminate(&de); 109 error = uiomove(&de, DE_SIZE, uio); 110 if (error) 111 goto out; 112 offset++; 113 uio->uio_offset += DE_SIZE; 114 } 115 if (limit == 0) { 116 error = 0; 117 goto out; 118 } 119 if (offset != np->n_dirofs || np->n_dirseq == NULL) { 120 SMBVDEBUG("Reopening search %ld:%ld\n", offset, np->n_dirofs); 121 if (np->n_dirseq) { 122 smbfs_findclose(np->n_dirseq, scred); 123 np->n_dirseq = NULL; 124 } 125 np->n_dirofs = 2; 126 error = smbfs_findopen(np, "*", 1, 127 SMB_FA_SYSTEM | SMB_FA_HIDDEN | SMB_FA_DIR, 128 scred, &ctx); 129 if (error) { 130 SMBVDEBUG("can not open search, error = %d", error); 131 goto out; 132 } 133 np->n_dirseq = ctx; 134 } else 135 ctx = np->n_dirseq; 136 while (np->n_dirofs < offset) { 137 error = smbfs_findnext(ctx, offset - np->n_dirofs++, scred); 138 if (error) { 139 smbfs_findclose(np->n_dirseq, scred); 140 np->n_dirseq = NULL; 141 error = ENOENT ? 0 : error; 142 goto out; 143 } 144 } 145 error = 0; 146 for (; limit; limit--, offset++) { 147 error = smbfs_findnext(ctx, limit, scred); 148 if (error) 149 break; 150 np->n_dirofs++; 151 bzero((caddr_t)&de, DE_SIZE); 152 de.d_reclen = DE_SIZE; 153 de.d_fileno = ctx->f_attr.fa_ino; 154 de.d_type = (ctx->f_attr.fa_attr & SMB_FA_DIR) ? DT_DIR : DT_REG; 155 de.d_namlen = ctx->f_nmlen; 156 bcopy(ctx->f_name, de.d_name, de.d_namlen); 157 dirent_terminate(&de); 158 if (smbfs_fastlookup) { 159 error = smbfs_nget(vp->v_mount, vp, ctx->f_name, 160 ctx->f_nmlen, &ctx->f_attr, &newvp); 161 if (!error) { 162 cn.cn_nameptr = de.d_name; 163 cn.cn_namelen = de.d_namlen; 164 cache_enter(vp, newvp, &cn); 165 vput(newvp); 166 } 167 } 168 error = uiomove(&de, DE_SIZE, uio); 169 if (error) 170 break; 171 } 172 if (error == ENOENT) 173 error = 0; 174 uio->uio_offset = offset * DE_SIZE; 175out: 176 smbfs_free_scred(scred); 177 return error; 178} 179 180int 181smbfs_readvnode(struct vnode *vp, struct uio *uiop, struct ucred *cred) 182{ 183 struct smbmount *smp = VFSTOSMBFS(vp->v_mount); 184 struct smbnode *np = VTOSMB(vp); 185 struct thread *td; 186 struct vattr vattr; 187 struct smb_cred *scred; 188 int error, lks; 189 190 /* 191 * Protect against method which is not supported for now 192 */ 193 if (uiop->uio_segflg == UIO_NOCOPY) 194 return EOPNOTSUPP; 195 196 if (vp->v_type != VREG && vp->v_type != VDIR) { 197 SMBFSERR("vn types other than VREG or VDIR are unsupported !\n"); 198 return EIO; 199 } 200 if (uiop->uio_resid == 0) 201 return 0; 202 if (uiop->uio_offset < 0) 203 return EINVAL; 204/* if (uiop->uio_offset + uiop->uio_resid > smp->nm_maxfilesize) 205 return EFBIG;*/ 206 td = uiop->uio_td; 207 if (vp->v_type == VDIR) { 208 lks = LK_EXCLUSIVE; /* lockstatus(vp->v_vnlock); */ 209 if (lks == LK_SHARED) 210 vn_lock(vp, LK_UPGRADE | LK_RETRY); 211 error = smbfs_readvdir(vp, uiop, cred); 212 if (lks == LK_SHARED) 213 vn_lock(vp, LK_DOWNGRADE | LK_RETRY); 214 return error; 215 } 216 217/* biosize = SSTOCN(smp->sm_share)->sc_txmax;*/ 218 if (np->n_flag & NMODIFIED) { 219 smbfs_attr_cacheremove(vp); 220 error = VOP_GETATTR(vp, &vattr, cred); 221 if (error) 222 return error; 223 np->n_mtime.tv_sec = vattr.va_mtime.tv_sec; 224 } else { 225 error = VOP_GETATTR(vp, &vattr, cred); 226 if (error) 227 return error; 228 if (np->n_mtime.tv_sec != vattr.va_mtime.tv_sec) { 229 error = smbfs_vinvalbuf(vp, td); 230 if (error) 231 return error; 232 np->n_mtime.tv_sec = vattr.va_mtime.tv_sec; 233 } 234 } 235 scred = smbfs_malloc_scred(); 236 smb_makescred(scred, td, cred); 237 error = smb_read(smp->sm_share, np->n_fid, uiop, scred); 238 smbfs_free_scred(scred); 239 return (error); 240} 241 242int 243smbfs_writevnode(struct vnode *vp, struct uio *uiop, 244 struct ucred *cred, int ioflag) 245{ 246 struct smbmount *smp = VTOSMBFS(vp); 247 struct smbnode *np = VTOSMB(vp); 248 struct smb_cred *scred; 249 struct thread *td; 250 int error = 0; 251 252 if (vp->v_type != VREG) { 253 SMBERROR("vn types other than VREG unsupported !\n"); 254 return EIO; 255 } 256 SMBVDEBUG("ofs=%jd,resid=%zd\n", (intmax_t)uiop->uio_offset, 257 uiop->uio_resid); 258 if (uiop->uio_offset < 0) 259 return EINVAL; 260/* if (uiop->uio_offset + uiop->uio_resid > smp->nm_maxfilesize) 261 return (EFBIG);*/ 262 td = uiop->uio_td; 263 if (ioflag & (IO_APPEND | IO_SYNC)) { 264 if (np->n_flag & NMODIFIED) { 265 smbfs_attr_cacheremove(vp); 266 error = smbfs_vinvalbuf(vp, td); 267 if (error) 268 return error; 269 } 270 if (ioflag & IO_APPEND) { 271#ifdef notyet 272 /* 273 * File size can be changed by another client 274 */ 275 smbfs_attr_cacheremove(vp); 276 error = VOP_GETATTR(vp, &vattr, cred); 277 if (error) return (error); 278#endif 279 uiop->uio_offset = np->n_size; 280 } 281 } 282 if (uiop->uio_resid == 0) 283 return 0; 284 285 if (vn_rlimit_fsize(vp, uiop, td)) 286 return (EFBIG); 287 288 scred = smbfs_malloc_scred(); 289 smb_makescred(scred, td, cred); 290 error = smb_write(smp->sm_share, np->n_fid, uiop, scred); 291 smbfs_free_scred(scred); 292 SMBVDEBUG("after: ofs=%jd,resid=%zd\n", (intmax_t)uiop->uio_offset, 293 uiop->uio_resid); 294 if (!error) { 295 if (uiop->uio_offset > np->n_size) { 296 np->n_size = uiop->uio_offset; 297 vnode_pager_setsize(vp, np->n_size); 298 } 299 } 300 return error; 301} 302 303/* 304 * Do an I/O operation to/from a cache block. 305 */ 306int 307smbfs_doio(struct vnode *vp, struct buf *bp, struct ucred *cr, struct thread *td) 308{ 309 struct smbmount *smp = VFSTOSMBFS(vp->v_mount); 310 struct smbnode *np = VTOSMB(vp); 311 struct uio *uiop; 312 struct iovec io; 313 struct smb_cred *scred; 314 int error = 0; 315 316 uiop = malloc(sizeof(struct uio), M_SMBFSDATA, M_WAITOK); 317 uiop->uio_iov = &io; 318 uiop->uio_iovcnt = 1; 319 uiop->uio_segflg = UIO_SYSSPACE; 320 uiop->uio_td = td; 321 322 scred = smbfs_malloc_scred(); 323 smb_makescred(scred, td, cr); 324 325 if (bp->b_iocmd == BIO_READ) { 326 io.iov_len = uiop->uio_resid = bp->b_bcount; 327 io.iov_base = bp->b_data; 328 uiop->uio_rw = UIO_READ; 329 switch (vp->v_type) { 330 case VREG: 331 uiop->uio_offset = ((off_t)bp->b_blkno) * DEV_BSIZE; 332 error = smb_read(smp->sm_share, np->n_fid, uiop, scred); 333 if (error) 334 break; 335 if (uiop->uio_resid) { 336 int left = uiop->uio_resid; 337 int nread = bp->b_bcount - left; 338 if (left > 0) 339 bzero((char *)bp->b_data + nread, left); 340 } 341 break; 342 default: 343 printf("smbfs_doio: type %x unexpected\n",vp->v_type); 344 break; 345 } 346 if (error) { 347 bp->b_error = error; 348 bp->b_ioflags |= BIO_ERROR; 349 } 350 } else { /* write */ 351 if (((bp->b_blkno * DEV_BSIZE) + bp->b_dirtyend) > np->n_size) 352 bp->b_dirtyend = np->n_size - (bp->b_blkno * DEV_BSIZE); 353 354 if (bp->b_dirtyend > bp->b_dirtyoff) { 355 io.iov_len = uiop->uio_resid = bp->b_dirtyend - bp->b_dirtyoff; 356 uiop->uio_offset = ((off_t)bp->b_blkno) * DEV_BSIZE + bp->b_dirtyoff; 357 io.iov_base = (char *)bp->b_data + bp->b_dirtyoff; 358 uiop->uio_rw = UIO_WRITE; 359 error = smb_write(smp->sm_share, np->n_fid, uiop, scred); 360 361 /* 362 * For an interrupted write, the buffer is still valid 363 * and the write hasn't been pushed to the server yet, 364 * so we can't set BIO_ERROR and report the interruption 365 * by setting B_EINTR. For the B_ASYNC case, B_EINTR 366 * is not relevant, so the rpc attempt is essentially 367 * a noop. For the case of a V3 write rpc not being 368 * committed to stable storage, the block is still 369 * dirty and requires either a commit rpc or another 370 * write rpc with iomode == NFSV3WRITE_FILESYNC before 371 * the block is reused. This is indicated by setting 372 * the B_DELWRI and B_NEEDCOMMIT flags. 373 */ 374 if (error == EINTR 375 || (!error && (bp->b_flags & B_NEEDCOMMIT))) { 376 int s; 377 378 s = splbio(); 379 bp->b_flags &= ~(B_INVAL|B_NOCACHE); 380 if ((bp->b_flags & B_ASYNC) == 0) 381 bp->b_flags |= B_EINTR; 382 if ((bp->b_flags & B_PAGING) == 0) { 383 bdirty(bp); 384 bp->b_flags &= ~B_DONE; 385 } 386 if ((bp->b_flags & B_ASYNC) == 0) 387 bp->b_flags |= B_EINTR; 388 splx(s); 389 } else { 390 if (error) { 391 bp->b_ioflags |= BIO_ERROR; 392 bp->b_error = error; 393 } 394 bp->b_dirtyoff = bp->b_dirtyend = 0; 395 } 396 } else { 397 bp->b_resid = 0; 398 bufdone(bp); 399 free(uiop, M_SMBFSDATA); 400 smbfs_free_scred(scred); 401 return 0; 402 } 403 } 404 bp->b_resid = uiop->uio_resid; 405 bufdone(bp); 406 free(uiop, M_SMBFSDATA); 407 smbfs_free_scred(scred); 408 return error; 409} 410 411/* 412 * Vnode op for VM getpages. 413 * Wish wish .... get rid from multiple IO routines 414 */ 415int 416smbfs_getpages(ap) 417 struct vop_getpages_args /* { 418 struct vnode *a_vp; 419 vm_page_t *a_m; 420 int a_count; 421 int a_reqpage; 422 } */ *ap; 423{ 424#ifdef SMBFS_RWGENERIC 425 return vop_stdgetpages(ap); 426#else 427 int i, error, nextoff, size, toff, npages, count; 428 struct uio uio; 429 struct iovec iov; 430 vm_offset_t kva; 431 struct buf *bp; 432 struct vnode *vp; 433 struct thread *td; 434 struct ucred *cred; 435 struct smbmount *smp; 436 struct smbnode *np; 437 struct smb_cred *scred; 438 vm_object_t object; 439 vm_page_t *pages; 440 441 vp = ap->a_vp; 442 if ((object = vp->v_object) == NULL) { 443 printf("smbfs_getpages: called with non-merged cache vnode??\n"); 444 return VM_PAGER_ERROR; 445 } 446 447 td = curthread; /* XXX */ 448 cred = td->td_ucred; /* XXX */ 449 np = VTOSMB(vp); 450 smp = VFSTOSMBFS(vp->v_mount); 451 pages = ap->a_m; 452 npages = ap->a_count; 453 454 /* 455 * If the requested page is partially valid, just return it and 456 * allow the pager to zero-out the blanks. Partially valid pages 457 * can only occur at the file EOF. 458 * 459 * XXXGL: is that true for SMB filesystem? 460 */ 461 VM_OBJECT_WLOCK(object); 462 if (pages[npages - 1]->valid != 0 && --npages == 0) 463 goto out; 464 VM_OBJECT_WUNLOCK(object); 465 466 scred = smbfs_malloc_scred(); 467 smb_makescred(scred, td, cred); 468 469 bp = getpbuf(&smbfs_pbuf_freecnt); 470 471 kva = (vm_offset_t) bp->b_data; 472 pmap_qenter(kva, pages, npages); 473 PCPU_INC(cnt.v_vnodein); 474 PCPU_ADD(cnt.v_vnodepgsin, npages); 475 476 count = npages << PAGE_SHIFT; 477 iov.iov_base = (caddr_t) kva; 478 iov.iov_len = count; 479 uio.uio_iov = &iov; 480 uio.uio_iovcnt = 1; 481 uio.uio_offset = IDX_TO_OFF(pages[0]->pindex); 482 uio.uio_resid = count; 483 uio.uio_segflg = UIO_SYSSPACE; 484 uio.uio_rw = UIO_READ; 485 uio.uio_td = td; 486 487 error = smb_read(smp->sm_share, np->n_fid, &uio, scred); 488 smbfs_free_scred(scred); 489 pmap_qremove(kva, npages); 490 491 relpbuf(bp, &smbfs_pbuf_freecnt); 492 493 if (error && (uio.uio_resid == count)) { 494 printf("smbfs_getpages: error %d\n",error); 495 return VM_PAGER_ERROR; 496 } 497 498 size = count - uio.uio_resid; 499 500 VM_OBJECT_WLOCK(object); 501 for (i = 0, toff = 0; i < npages; i++, toff = nextoff) { 502 vm_page_t m; 503 nextoff = toff + PAGE_SIZE; 504 m = pages[i]; 505 506 if (nextoff <= size) { 507 /* 508 * Read operation filled an entire page 509 */ 510 m->valid = VM_PAGE_BITS_ALL; 511 KASSERT(m->dirty == 0, 512 ("smbfs_getpages: page %p is dirty", m)); 513 } else if (size > toff) { 514 /* 515 * Read operation filled a partial page. 516 */ 517 m->valid = 0; 518 vm_page_set_valid_range(m, 0, size - toff); 519 KASSERT(m->dirty == 0, 520 ("smbfs_getpages: page %p is dirty", m)); 521 } else { 522 /* 523 * Read operation was short. If no error occurred 524 * we may have hit a zero-fill section. We simply 525 * leave valid set to 0. 526 */ 527 ; 528 } 529 } 530out: 531 VM_OBJECT_WUNLOCK(object); 532 if (ap->a_rbehind) 533 *ap->a_rbehind = 0; 534 if (ap->a_rahead) 535 *ap->a_rahead = 0; 536 return (VM_PAGER_OK); 537#endif /* SMBFS_RWGENERIC */ 538} 539 540/* 541 * Vnode op for VM putpages. 542 * possible bug: all IO done in sync mode 543 * Note that vop_close always invalidate pages before close, so it's 544 * not necessary to open vnode. 545 */ 546int 547smbfs_putpages(ap) 548 struct vop_putpages_args /* { 549 struct vnode *a_vp; 550 vm_page_t *a_m; 551 int a_count; 552 int a_sync; 553 int *a_rtvals; 554 } */ *ap; 555{ 556 int error; 557 struct vnode *vp = ap->a_vp; 558 struct thread *td; 559 struct ucred *cred; 560 561#ifdef SMBFS_RWGENERIC 562 td = curthread; /* XXX */ 563 cred = td->td_ucred; /* XXX */ 564 VOP_OPEN(vp, FWRITE, cred, td, NULL); 565 error = vop_stdputpages(ap); 566 VOP_CLOSE(vp, FWRITE, cred, td); 567 return error; 568#else 569 struct uio uio; 570 struct iovec iov; 571 vm_offset_t kva; 572 struct buf *bp; 573 int i, npages, count; 574 int *rtvals; 575 struct smbmount *smp; 576 struct smbnode *np; 577 struct smb_cred *scred; 578 vm_page_t *pages; 579 580 td = curthread; /* XXX */ 581 cred = td->td_ucred; /* XXX */ 582/* VOP_OPEN(vp, FWRITE, cred, td, NULL);*/ 583 np = VTOSMB(vp); 584 smp = VFSTOSMBFS(vp->v_mount); 585 pages = ap->a_m; 586 count = ap->a_count; 587 rtvals = ap->a_rtvals; 588 npages = btoc(count); 589 590 for (i = 0; i < npages; i++) { 591 rtvals[i] = VM_PAGER_ERROR; 592 } 593 594 bp = getpbuf(&smbfs_pbuf_freecnt); 595 596 kva = (vm_offset_t) bp->b_data; 597 pmap_qenter(kva, pages, npages); 598 PCPU_INC(cnt.v_vnodeout); 599 PCPU_ADD(cnt.v_vnodepgsout, count); 600 601 iov.iov_base = (caddr_t) kva; 602 iov.iov_len = count; 603 uio.uio_iov = &iov; 604 uio.uio_iovcnt = 1; 605 uio.uio_offset = IDX_TO_OFF(pages[0]->pindex); 606 uio.uio_resid = count; 607 uio.uio_segflg = UIO_SYSSPACE; 608 uio.uio_rw = UIO_WRITE; 609 uio.uio_td = td; 610 SMBVDEBUG("ofs=%jd,resid=%zd\n", (intmax_t)uio.uio_offset, 611 uio.uio_resid); 612 613 scred = smbfs_malloc_scred(); 614 smb_makescred(scred, td, cred); 615 error = smb_write(smp->sm_share, np->n_fid, &uio, scred); 616 smbfs_free_scred(scred); 617/* VOP_CLOSE(vp, FWRITE, cred, td);*/ 618 SMBVDEBUG("paged write done: %d\n", error); 619 620 pmap_qremove(kva, npages); 621 622 relpbuf(bp, &smbfs_pbuf_freecnt); 623 624 if (error == 0) { 625 vnode_pager_undirty_pages(pages, rtvals, count - uio.uio_resid, 626 npages * PAGE_SIZE, npages * PAGE_SIZE); 627 } 628 return (rtvals[0]); 629#endif /* SMBFS_RWGENERIC */ 630} 631 632/* 633 * Flush and invalidate all dirty buffers. If another process is already 634 * doing the flush, just wait for completion. 635 */ 636int 637smbfs_vinvalbuf(struct vnode *vp, struct thread *td) 638{ 639 struct smbnode *np = VTOSMB(vp); 640 int error = 0; 641 642 if (vp->v_iflag & VI_DOOMED) 643 return 0; 644 645 while (np->n_flag & NFLUSHINPROG) { 646 np->n_flag |= NFLUSHWANT; 647 error = tsleep(&np->n_flag, PRIBIO + 2, "smfsvinv", 2 * hz); 648 error = smb_td_intr(td); 649 if (error == EINTR) 650 return EINTR; 651 } 652 np->n_flag |= NFLUSHINPROG; 653 654 if (vp->v_bufobj.bo_object != NULL) { 655 VM_OBJECT_WLOCK(vp->v_bufobj.bo_object); 656 vm_object_page_clean(vp->v_bufobj.bo_object, 0, 0, OBJPC_SYNC); 657 VM_OBJECT_WUNLOCK(vp->v_bufobj.bo_object); 658 } 659 660 error = vinvalbuf(vp, V_SAVE, PCATCH, 0); 661 while (error) { 662 if (error == ERESTART || error == EINTR) { 663 np->n_flag &= ~NFLUSHINPROG; 664 if (np->n_flag & NFLUSHWANT) { 665 np->n_flag &= ~NFLUSHWANT; 666 wakeup(&np->n_flag); 667 } 668 return EINTR; 669 } 670 error = vinvalbuf(vp, V_SAVE, PCATCH, 0); 671 } 672 np->n_flag &= ~(NMODIFIED | NFLUSHINPROG); 673 if (np->n_flag & NFLUSHWANT) { 674 np->n_flag &= ~NFLUSHWANT; 675 wakeup(&np->n_flag); 676 } 677 return (error); 678} 679