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/signalvar.h> 40 #include <sys/sysctl.h> 41 #include <sys/vmmeter.h> 42 43 #include <vm/vm.h> 44 #include <vm/vm_param.h> 45 #include <vm/vm_page.h> 46 #include <vm/vm_extern.h> 47 #include <vm/vm_object.h> 48 #include <vm/vm_pager.h> 49 #include <vm/vnode_pager.h> 50 /* 51 #include <sys/ioccom.h> 52 */ 53 #include <netsmb/smb.h> 54 #include <netsmb/smb_conn.h> 55 #include <netsmb/smb_subr.h> 56 57 #include <fs/smbfs/smbfs.h> 58 #include <fs/smbfs/smbfs_node.h> 59 #include <fs/smbfs/smbfs_subr.h> 60 61 /*#define SMBFS_RWGENERIC*/ 62 63 extern int smbfs_pbuf_freecnt; 64 65 static int smbfs_fastlookup = 1; 66 67 SYSCTL_DECL(_vfs_smbfs); 68 SYSCTL_INT(_vfs_smbfs, OID_AUTO, fastlookup, CTLFLAG_RW, &smbfs_fastlookup, 0, ""); 69 70 71 #define DE_SIZE (sizeof(struct dirent)) 72 73 static int 74 smbfs_readvdir(struct vnode *vp, struct uio *uio, struct ucred *cred) 75 { 76 struct dirent de; 77 struct componentname cn; 78 struct smb_cred *scred; 79 struct smbfs_fctx *ctx; 80 struct vnode *newvp; 81 struct smbnode *np = VTOSMB(vp); 82 int error/*, *eofflag = ap->a_eofflag*/; 83 long offset, limit; 84 85 np = VTOSMB(vp); 86 SMBVDEBUG("dirname='%s'\n", np->n_name); 87 scred = smbfs_malloc_scred(); 88 smb_makescred(scred, uio->uio_td, cred); 89 offset = uio->uio_offset / DE_SIZE; /* offset in the directory */ 90 limit = uio->uio_resid / DE_SIZE; 91 if (uio->uio_resid < DE_SIZE || uio->uio_offset < 0) { 92 error = EINVAL; 93 goto out; 94 } 95 while (limit && offset < 2) { 96 limit--; 97 bzero((caddr_t)&de, DE_SIZE); 98 de.d_reclen = DE_SIZE; 99 de.d_fileno = (offset == 0) ? np->n_ino : 100 (np->n_parent ? np->n_parentino : 2); 101 if (de.d_fileno == 0) 102 de.d_fileno = 0x7ffffffd + offset; 103 de.d_namlen = offset + 1; 104 de.d_name[0] = '.'; 105 de.d_name[1] = '.'; 106 de.d_name[offset + 1] = '\0'; 107 de.d_type = DT_DIR; 108 error = uiomove(&de, DE_SIZE, uio); 109 if (error) 110 goto out; 111 offset++; 112 uio->uio_offset += DE_SIZE; 113 } 114 if (limit == 0) { 115 error = 0; 116 goto out; 117 } 118 if (offset != np->n_dirofs || np->n_dirseq == NULL) { 119 SMBVDEBUG("Reopening search %ld:%ld\n", offset, np->n_dirofs); 120 if (np->n_dirseq) { 121 smbfs_findclose(np->n_dirseq, scred); 122 np->n_dirseq = NULL; 123 } 124 np->n_dirofs = 2; 125 error = smbfs_findopen(np, "*", 1, 126 SMB_FA_SYSTEM | SMB_FA_HIDDEN | SMB_FA_DIR, 127 scred, &ctx); 128 if (error) { 129 SMBVDEBUG("can not open search, error = %d", error); 130 goto out; 131 } 132 np->n_dirseq = ctx; 133 } else 134 ctx = np->n_dirseq; 135 while (np->n_dirofs < offset) { 136 error = smbfs_findnext(ctx, offset - np->n_dirofs++, scred); 137 if (error) { 138 smbfs_findclose(np->n_dirseq, scred); 139 np->n_dirseq = NULL; 140 error = ENOENT ? 0 : error; 141 goto out; 142 } 143 } 144 error = 0; 145 for (; limit; limit--, offset++) { 146 error = smbfs_findnext(ctx, limit, scred); 147 if (error) 148 break; 149 np->n_dirofs++; 150 bzero((caddr_t)&de, DE_SIZE); 151 de.d_reclen = DE_SIZE; 152 de.d_fileno = ctx->f_attr.fa_ino; 153 de.d_type = (ctx->f_attr.fa_attr & SMB_FA_DIR) ? DT_DIR : DT_REG; 154 de.d_namlen = ctx->f_nmlen; 155 bcopy(ctx->f_name, de.d_name, de.d_namlen); 156 de.d_name[de.d_namlen] = '\0'; 157 if (smbfs_fastlookup) { 158 error = smbfs_nget(vp->v_mount, vp, ctx->f_name, 159 ctx->f_nmlen, &ctx->f_attr, &newvp); 160 if (!error) { 161 cn.cn_nameptr = de.d_name; 162 cn.cn_namelen = de.d_namlen; 163 cache_enter(vp, newvp, &cn); 164 vput(newvp); 165 } 166 } 167 error = uiomove(&de, DE_SIZE, uio); 168 if (error) 169 break; 170 } 171 if (error == ENOENT) 172 error = 0; 173 uio->uio_offset = offset * DE_SIZE; 174 out: 175 smbfs_free_scred(scred); 176 return error; 177 } 178 179 int 180 smbfs_readvnode(struct vnode *vp, struct uio *uiop, struct ucred *cred) 181 { 182 struct smbmount *smp = VFSTOSMBFS(vp->v_mount); 183 struct smbnode *np = VTOSMB(vp); 184 struct thread *td; 185 struct vattr vattr; 186 struct smb_cred *scred; 187 int error, lks; 188 189 /* 190 * Protect against method which is not supported for now 191 */ 192 if (uiop->uio_segflg == UIO_NOCOPY) 193 return EOPNOTSUPP; 194 195 if (vp->v_type != VREG && vp->v_type != VDIR) { 196 SMBFSERR("vn types other than VREG or VDIR are unsupported !\n"); 197 return EIO; 198 } 199 if (uiop->uio_resid == 0) 200 return 0; 201 if (uiop->uio_offset < 0) 202 return EINVAL; 203 /* if (uiop->uio_offset + uiop->uio_resid > smp->nm_maxfilesize) 204 return EFBIG;*/ 205 td = uiop->uio_td; 206 if (vp->v_type == VDIR) { 207 lks = LK_EXCLUSIVE; /* lockstatus(vp->v_vnlock); */ 208 if (lks == LK_SHARED) 209 vn_lock(vp, LK_UPGRADE | LK_RETRY); 210 error = smbfs_readvdir(vp, uiop, cred); 211 if (lks == LK_SHARED) 212 vn_lock(vp, LK_DOWNGRADE | LK_RETRY); 213 return error; 214 } 215 216 /* biosize = SSTOCN(smp->sm_share)->sc_txmax;*/ 217 if (np->n_flag & NMODIFIED) { 218 smbfs_attr_cacheremove(vp); 219 error = VOP_GETATTR(vp, &vattr, cred); 220 if (error) 221 return error; 222 np->n_mtime.tv_sec = vattr.va_mtime.tv_sec; 223 } else { 224 error = VOP_GETATTR(vp, &vattr, cred); 225 if (error) 226 return error; 227 if (np->n_mtime.tv_sec != vattr.va_mtime.tv_sec) { 228 error = smbfs_vinvalbuf(vp, td); 229 if (error) 230 return error; 231 np->n_mtime.tv_sec = vattr.va_mtime.tv_sec; 232 } 233 } 234 scred = smbfs_malloc_scred(); 235 smb_makescred(scred, td, cred); 236 error = smb_read(smp->sm_share, np->n_fid, uiop, scred); 237 smbfs_free_scred(scred); 238 return (error); 239 } 240 241 int 242 smbfs_writevnode(struct vnode *vp, struct uio *uiop, 243 struct ucred *cred, int ioflag) 244 { 245 struct smbmount *smp = VTOSMBFS(vp); 246 struct smbnode *np = VTOSMB(vp); 247 struct smb_cred *scred; 248 struct thread *td; 249 int error = 0; 250 251 if (vp->v_type != VREG) { 252 SMBERROR("vn types other than VREG unsupported !\n"); 253 return EIO; 254 } 255 SMBVDEBUG("ofs=%jd,resid=%zd\n", (intmax_t)uiop->uio_offset, 256 uiop->uio_resid); 257 if (uiop->uio_offset < 0) 258 return EINVAL; 259 /* if (uiop->uio_offset + uiop->uio_resid > smp->nm_maxfilesize) 260 return (EFBIG);*/ 261 td = uiop->uio_td; 262 if (ioflag & (IO_APPEND | IO_SYNC)) { 263 if (np->n_flag & NMODIFIED) { 264 smbfs_attr_cacheremove(vp); 265 error = smbfs_vinvalbuf(vp, td); 266 if (error) 267 return error; 268 } 269 if (ioflag & IO_APPEND) { 270 #ifdef notyet 271 /* 272 * File size can be changed by another client 273 */ 274 smbfs_attr_cacheremove(vp); 275 error = VOP_GETATTR(vp, &vattr, cred); 276 if (error) return (error); 277 #endif 278 uiop->uio_offset = np->n_size; 279 } 280 } 281 if (uiop->uio_resid == 0) 282 return 0; 283 284 if (vn_rlimit_fsize(vp, uiop, td)) 285 return (EFBIG); 286 287 scred = smbfs_malloc_scred(); 288 smb_makescred(scred, td, cred); 289 error = smb_write(smp->sm_share, np->n_fid, uiop, scred); 290 smbfs_free_scred(scred); 291 SMBVDEBUG("after: ofs=%jd,resid=%zd\n", (intmax_t)uiop->uio_offset, 292 uiop->uio_resid); 293 if (!error) { 294 if (uiop->uio_offset > np->n_size) { 295 np->n_size = uiop->uio_offset; 296 vnode_pager_setsize(vp, np->n_size); 297 } 298 } 299 return error; 300 } 301 302 /* 303 * Do an I/O operation to/from a cache block. 304 */ 305 int 306 smbfs_doio(struct vnode *vp, struct buf *bp, struct ucred *cr, struct thread *td) 307 { 308 struct smbmount *smp = VFSTOSMBFS(vp->v_mount); 309 struct smbnode *np = VTOSMB(vp); 310 struct uio *uiop; 311 struct iovec io; 312 struct smb_cred *scred; 313 int error = 0; 314 315 uiop = malloc(sizeof(struct uio), M_SMBFSDATA, M_WAITOK); 316 uiop->uio_iov = &io; 317 uiop->uio_iovcnt = 1; 318 uiop->uio_segflg = UIO_SYSSPACE; 319 uiop->uio_td = td; 320 321 scred = smbfs_malloc_scred(); 322 smb_makescred(scred, td, cr); 323 324 if (bp->b_iocmd == BIO_READ) { 325 io.iov_len = uiop->uio_resid = bp->b_bcount; 326 io.iov_base = bp->b_data; 327 uiop->uio_rw = UIO_READ; 328 switch (vp->v_type) { 329 case VREG: 330 uiop->uio_offset = ((off_t)bp->b_blkno) * DEV_BSIZE; 331 error = smb_read(smp->sm_share, np->n_fid, uiop, scred); 332 if (error) 333 break; 334 if (uiop->uio_resid) { 335 int left = uiop->uio_resid; 336 int nread = bp->b_bcount - left; 337 if (left > 0) 338 bzero((char *)bp->b_data + nread, left); 339 } 340 break; 341 default: 342 printf("smbfs_doio: type %x unexpected\n",vp->v_type); 343 break; 344 }; 345 if (error) { 346 bp->b_error = error; 347 bp->b_ioflags |= BIO_ERROR; 348 } 349 } else { /* write */ 350 if (((bp->b_blkno * DEV_BSIZE) + bp->b_dirtyend) > np->n_size) 351 bp->b_dirtyend = np->n_size - (bp->b_blkno * DEV_BSIZE); 352 353 if (bp->b_dirtyend > bp->b_dirtyoff) { 354 io.iov_len = uiop->uio_resid = bp->b_dirtyend - bp->b_dirtyoff; 355 uiop->uio_offset = ((off_t)bp->b_blkno) * DEV_BSIZE + bp->b_dirtyoff; 356 io.iov_base = (char *)bp->b_data + bp->b_dirtyoff; 357 uiop->uio_rw = UIO_WRITE; 358 error = smb_write(smp->sm_share, np->n_fid, uiop, scred); 359 360 /* 361 * For an interrupted write, the buffer is still valid 362 * and the write hasn't been pushed to the server yet, 363 * so we can't set BIO_ERROR and report the interruption 364 * by setting B_EINTR. For the B_ASYNC case, B_EINTR 365 * is not relevant, so the rpc attempt is essentially 366 * a noop. For the case of a V3 write rpc not being 367 * committed to stable storage, the block is still 368 * dirty and requires either a commit rpc or another 369 * write rpc with iomode == NFSV3WRITE_FILESYNC before 370 * the block is reused. This is indicated by setting 371 * the B_DELWRI and B_NEEDCOMMIT flags. 372 */ 373 if (error == EINTR 374 || (!error && (bp->b_flags & B_NEEDCOMMIT))) { 375 int s; 376 377 s = splbio(); 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 splx(s); 388 } else { 389 if (error) { 390 bp->b_ioflags |= BIO_ERROR; 391 bp->b_error = error; 392 } 393 bp->b_dirtyoff = bp->b_dirtyend = 0; 394 } 395 } else { 396 bp->b_resid = 0; 397 bufdone(bp); 398 free(uiop, M_SMBFSDATA); 399 smbfs_free_scred(scred); 400 return 0; 401 } 402 } 403 bp->b_resid = uiop->uio_resid; 404 bufdone(bp); 405 free(uiop, M_SMBFSDATA); 406 smbfs_free_scred(scred); 407 return error; 408 } 409 410 /* 411 * Vnode op for VM getpages. 412 * Wish wish .... get rid from multiple IO routines 413 */ 414 int 415 smbfs_getpages(ap) 416 struct vop_getpages_args /* { 417 struct vnode *a_vp; 418 vm_page_t *a_m; 419 int a_count; 420 int a_reqpage; 421 vm_ooffset_t a_offset; 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_LOCK(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_UNLOCK(object); 473 return 0; 474 } 475 VM_OBJECT_UNLOCK(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_LOCK(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_UNLOCK(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_UNLOCK(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 vm_ooffset_t a_offset; 571 } */ *ap; 572 { 573 int error; 574 struct vnode *vp = ap->a_vp; 575 struct thread *td; 576 struct ucred *cred; 577 578 #ifdef SMBFS_RWGENERIC 579 td = curthread; /* XXX */ 580 cred = td->td_ucred; /* XXX */ 581 VOP_OPEN(vp, FWRITE, cred, td, NULL); 582 error = vop_stdputpages(ap); 583 VOP_CLOSE(vp, FWRITE, cred, td); 584 return error; 585 #else 586 struct uio uio; 587 struct iovec iov; 588 vm_offset_t kva; 589 struct buf *bp; 590 int i, npages, count; 591 int *rtvals; 592 struct smbmount *smp; 593 struct smbnode *np; 594 struct smb_cred *scred; 595 vm_page_t *pages; 596 597 td = curthread; /* XXX */ 598 cred = td->td_ucred; /* XXX */ 599 /* VOP_OPEN(vp, FWRITE, cred, td, NULL);*/ 600 np = VTOSMB(vp); 601 smp = VFSTOSMBFS(vp->v_mount); 602 pages = ap->a_m; 603 count = ap->a_count; 604 rtvals = ap->a_rtvals; 605 npages = btoc(count); 606 607 for (i = 0; i < npages; i++) { 608 rtvals[i] = VM_PAGER_ERROR; 609 } 610 611 bp = getpbuf(&smbfs_pbuf_freecnt); 612 613 kva = (vm_offset_t) bp->b_data; 614 pmap_qenter(kva, pages, npages); 615 PCPU_INC(cnt.v_vnodeout); 616 PCPU_ADD(cnt.v_vnodepgsout, count); 617 618 iov.iov_base = (caddr_t) kva; 619 iov.iov_len = count; 620 uio.uio_iov = &iov; 621 uio.uio_iovcnt = 1; 622 uio.uio_offset = IDX_TO_OFF(pages[0]->pindex); 623 uio.uio_resid = count; 624 uio.uio_segflg = UIO_SYSSPACE; 625 uio.uio_rw = UIO_WRITE; 626 uio.uio_td = td; 627 SMBVDEBUG("ofs=%jd,resid=%zd\n", (intmax_t)uio.uio_offset, 628 uio.uio_resid); 629 630 scred = smbfs_malloc_scred(); 631 smb_makescred(scred, td, cred); 632 error = smb_write(smp->sm_share, np->n_fid, &uio, scred); 633 smbfs_free_scred(scred); 634 /* VOP_CLOSE(vp, FWRITE, cred, td);*/ 635 SMBVDEBUG("paged write done: %d\n", error); 636 637 pmap_qremove(kva, npages); 638 639 relpbuf(bp, &smbfs_pbuf_freecnt); 640 641 if (!error) 642 vnode_pager_undirty_pages(pages, rtvals, count - uio.uio_resid); 643 return rtvals[0]; 644 #endif /* SMBFS_RWGENERIC */ 645 } 646 647 /* 648 * Flush and invalidate all dirty buffers. If another process is already 649 * doing the flush, just wait for completion. 650 */ 651 int 652 smbfs_vinvalbuf(struct vnode *vp, struct thread *td) 653 { 654 struct smbnode *np = VTOSMB(vp); 655 int error = 0; 656 657 if (vp->v_iflag & VI_DOOMED) 658 return 0; 659 660 while (np->n_flag & NFLUSHINPROG) { 661 np->n_flag |= NFLUSHWANT; 662 error = tsleep(&np->n_flag, PRIBIO + 2, "smfsvinv", 2 * hz); 663 error = smb_td_intr(td); 664 if (error == EINTR) 665 return EINTR; 666 } 667 np->n_flag |= NFLUSHINPROG; 668 669 if (vp->v_bufobj.bo_object != NULL) { 670 VM_OBJECT_LOCK(vp->v_bufobj.bo_object); 671 vm_object_page_clean(vp->v_bufobj.bo_object, 0, 0, OBJPC_SYNC); 672 VM_OBJECT_UNLOCK(vp->v_bufobj.bo_object); 673 } 674 675 error = vinvalbuf(vp, V_SAVE, PCATCH, 0); 676 while (error) { 677 if (error == ERESTART || error == EINTR) { 678 np->n_flag &= ~NFLUSHINPROG; 679 if (np->n_flag & NFLUSHWANT) { 680 np->n_flag &= ~NFLUSHWANT; 681 wakeup(&np->n_flag); 682 } 683 return EINTR; 684 } 685 error = vinvalbuf(vp, V_SAVE, PCATCH, 0); 686 } 687 np->n_flag &= ~(NMODIFIED | NFLUSHINPROG); 688 if (np->n_flag & NFLUSHWANT) { 689 np->n_flag &= ~NFLUSHWANT; 690 wakeup(&np->n_flag); 691 } 692 return (error); 693 } 694