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 * $FreeBSD$ 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 64 extern int smbfs_pbuf_freecnt; 65 66 static int smbfs_fastlookup = 1; 67 68 SYSCTL_DECL(_vfs_smbfs); 69 SYSCTL_INT(_vfs_smbfs, OID_AUTO, fastlookup, CTLFLAG_RW, &smbfs_fastlookup, 0, ""); 70 71 72 #define DE_SIZE (sizeof(struct dirent)) 73 74 static int 75 smbfs_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_name[offset + 1] = '\0'; 108 de.d_type = DT_DIR; 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 de.d_name[de.d_namlen] = '\0'; 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; 175 out: 176 smbfs_free_scred(scred); 177 return error; 178 } 179 180 int 181 smbfs_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 } 241 242 int 243 smbfs_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 */ 306 int 307 smbfs_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 */ 415 int 416 smbfs_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, reqpage; 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, m; 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 count = ap->a_count; 453 npages = btoc(count); 454 reqpage = ap->a_reqpage; 455 456 /* 457 * If the requested page is partially valid, just return it and 458 * allow the pager to zero-out the blanks. Partially valid pages 459 * can only occur at the file EOF. 460 */ 461 m = pages[reqpage]; 462 463 VM_OBJECT_WLOCK(object); 464 if (m->valid != 0) { 465 for (i = 0; i < npages; ++i) { 466 if (i != reqpage) { 467 vm_page_lock(pages[i]); 468 vm_page_free(pages[i]); 469 vm_page_unlock(pages[i]); 470 } 471 } 472 VM_OBJECT_WUNLOCK(object); 473 return 0; 474 } 475 VM_OBJECT_WUNLOCK(object); 476 477 scred = smbfs_malloc_scred(); 478 smb_makescred(scred, td, cred); 479 480 bp = getpbuf(&smbfs_pbuf_freecnt); 481 482 kva = (vm_offset_t) bp->b_data; 483 pmap_qenter(kva, pages, npages); 484 PCPU_INC(cnt.v_vnodein); 485 PCPU_ADD(cnt.v_vnodepgsin, npages); 486 487 iov.iov_base = (caddr_t) kva; 488 iov.iov_len = count; 489 uio.uio_iov = &iov; 490 uio.uio_iovcnt = 1; 491 uio.uio_offset = IDX_TO_OFF(pages[0]->pindex); 492 uio.uio_resid = count; 493 uio.uio_segflg = UIO_SYSSPACE; 494 uio.uio_rw = UIO_READ; 495 uio.uio_td = td; 496 497 error = smb_read(smp->sm_share, np->n_fid, &uio, scred); 498 smbfs_free_scred(scred); 499 pmap_qremove(kva, npages); 500 501 relpbuf(bp, &smbfs_pbuf_freecnt); 502 503 VM_OBJECT_WLOCK(object); 504 if (error && (uio.uio_resid == count)) { 505 printf("smbfs_getpages: error %d\n",error); 506 for (i = 0; i < npages; i++) { 507 if (reqpage != i) { 508 vm_page_lock(pages[i]); 509 vm_page_free(pages[i]); 510 vm_page_unlock(pages[i]); 511 } 512 } 513 VM_OBJECT_WUNLOCK(object); 514 return VM_PAGER_ERROR; 515 } 516 517 size = count - uio.uio_resid; 518 519 for (i = 0, toff = 0; i < npages; i++, toff = nextoff) { 520 vm_page_t m; 521 nextoff = toff + PAGE_SIZE; 522 m = pages[i]; 523 524 if (nextoff <= size) { 525 /* 526 * Read operation filled an entire page 527 */ 528 m->valid = VM_PAGE_BITS_ALL; 529 KASSERT(m->dirty == 0, 530 ("smbfs_getpages: page %p is dirty", m)); 531 } else if (size > toff) { 532 /* 533 * Read operation filled a partial page. 534 */ 535 m->valid = 0; 536 vm_page_set_valid_range(m, 0, size - toff); 537 KASSERT(m->dirty == 0, 538 ("smbfs_getpages: page %p is dirty", m)); 539 } else { 540 /* 541 * Read operation was short. If no error occured 542 * we may have hit a zero-fill section. We simply 543 * leave valid set to 0. 544 */ 545 ; 546 } 547 548 if (i != reqpage) 549 vm_page_readahead_finish(m); 550 } 551 VM_OBJECT_WUNLOCK(object); 552 return 0; 553 #endif /* SMBFS_RWGENERIC */ 554 } 555 556 /* 557 * Vnode op for VM putpages. 558 * possible bug: all IO done in sync mode 559 * Note that vop_close always invalidate pages before close, so it's 560 * not necessary to open vnode. 561 */ 562 int 563 smbfs_putpages(ap) 564 struct vop_putpages_args /* { 565 struct vnode *a_vp; 566 vm_page_t *a_m; 567 int a_count; 568 int a_sync; 569 int *a_rtvals; 570 } */ *ap; 571 { 572 int error; 573 struct vnode *vp = ap->a_vp; 574 struct thread *td; 575 struct ucred *cred; 576 577 #ifdef SMBFS_RWGENERIC 578 td = curthread; /* XXX */ 579 cred = td->td_ucred; /* XXX */ 580 VOP_OPEN(vp, FWRITE, cred, td, NULL); 581 error = vop_stdputpages(ap); 582 VOP_CLOSE(vp, FWRITE, cred, td); 583 return error; 584 #else 585 struct uio uio; 586 struct iovec iov; 587 vm_offset_t kva; 588 struct buf *bp; 589 int i, npages, count; 590 int *rtvals; 591 struct smbmount *smp; 592 struct smbnode *np; 593 struct smb_cred *scred; 594 vm_page_t *pages; 595 596 td = curthread; /* XXX */ 597 cred = td->td_ucred; /* XXX */ 598 /* VOP_OPEN(vp, FWRITE, cred, td, NULL);*/ 599 np = VTOSMB(vp); 600 smp = VFSTOSMBFS(vp->v_mount); 601 pages = ap->a_m; 602 count = ap->a_count; 603 rtvals = ap->a_rtvals; 604 npages = btoc(count); 605 606 for (i = 0; i < npages; i++) { 607 rtvals[i] = VM_PAGER_ERROR; 608 } 609 610 bp = getpbuf(&smbfs_pbuf_freecnt); 611 612 kva = (vm_offset_t) bp->b_data; 613 pmap_qenter(kva, pages, npages); 614 PCPU_INC(cnt.v_vnodeout); 615 PCPU_ADD(cnt.v_vnodepgsout, count); 616 617 iov.iov_base = (caddr_t) kva; 618 iov.iov_len = count; 619 uio.uio_iov = &iov; 620 uio.uio_iovcnt = 1; 621 uio.uio_offset = IDX_TO_OFF(pages[0]->pindex); 622 uio.uio_resid = count; 623 uio.uio_segflg = UIO_SYSSPACE; 624 uio.uio_rw = UIO_WRITE; 625 uio.uio_td = td; 626 SMBVDEBUG("ofs=%jd,resid=%zd\n", (intmax_t)uio.uio_offset, 627 uio.uio_resid); 628 629 scred = smbfs_malloc_scred(); 630 smb_makescred(scred, td, cred); 631 error = smb_write(smp->sm_share, np->n_fid, &uio, scred); 632 smbfs_free_scred(scred); 633 /* VOP_CLOSE(vp, FWRITE, cred, td);*/ 634 SMBVDEBUG("paged write done: %d\n", error); 635 636 pmap_qremove(kva, npages); 637 638 relpbuf(bp, &smbfs_pbuf_freecnt); 639 640 if (!error) 641 vnode_pager_undirty_pages(pages, rtvals, count - uio.uio_resid); 642 return rtvals[0]; 643 #endif /* SMBFS_RWGENERIC */ 644 } 645 646 /* 647 * Flush and invalidate all dirty buffers. If another process is already 648 * doing the flush, just wait for completion. 649 */ 650 int 651 smbfs_vinvalbuf(struct vnode *vp, struct thread *td) 652 { 653 struct smbnode *np = VTOSMB(vp); 654 int error = 0; 655 656 if (vp->v_iflag & VI_DOOMED) 657 return 0; 658 659 while (np->n_flag & NFLUSHINPROG) { 660 np->n_flag |= NFLUSHWANT; 661 error = tsleep(&np->n_flag, PRIBIO + 2, "smfsvinv", 2 * hz); 662 error = smb_td_intr(td); 663 if (error == EINTR) 664 return EINTR; 665 } 666 np->n_flag |= NFLUSHINPROG; 667 668 if (vp->v_bufobj.bo_object != NULL) { 669 VM_OBJECT_WLOCK(vp->v_bufobj.bo_object); 670 vm_object_page_clean(vp->v_bufobj.bo_object, 0, 0, OBJPC_SYNC); 671 VM_OBJECT_WUNLOCK(vp->v_bufobj.bo_object); 672 } 673 674 error = vinvalbuf(vp, V_SAVE, PCATCH, 0); 675 while (error) { 676 if (error == ERESTART || error == EINTR) { 677 np->n_flag &= ~NFLUSHINPROG; 678 if (np->n_flag & NFLUSHWANT) { 679 np->n_flag &= ~NFLUSHWANT; 680 wakeup(&np->n_flag); 681 } 682 return EINTR; 683 } 684 error = vinvalbuf(vp, V_SAVE, PCATCH, 0); 685 } 686 np->n_flag &= ~(NMODIFIED | NFLUSHINPROG); 687 if (np->n_flag & NFLUSHWANT) { 688 np->n_flag &= ~NFLUSHWANT; 689 wakeup(&np->n_flag); 690 } 691 return (error); 692 } 693