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/resourcevar.h> /* defines plimit structure in proc struct */ 32 #include <sys/kernel.h> 33 #include <sys/proc.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/signalvar.h> 42 #include <sys/sysctl.h> 43 #include <sys/vmmeter.h> 44 45 #include <vm/vm.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 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 return EINVAL; 93 while (limit && offset < 2) { 94 limit--; 95 bzero((caddr_t)&de, DE_SIZE); 96 de.d_reclen = DE_SIZE; 97 de.d_fileno = (offset == 0) ? np->n_ino : 98 (np->n_parent ? VTOSMB(np->n_parent)->n_ino : 2); 99 if (de.d_fileno == 0) 100 de.d_fileno = 0x7ffffffd + offset; 101 de.d_namlen = offset + 1; 102 de.d_name[0] = '.'; 103 de.d_name[1] = '.'; 104 de.d_name[offset + 1] = '\0'; 105 de.d_type = DT_DIR; 106 error = uiomove(&de, DE_SIZE, uio); 107 if (error) 108 return error; 109 offset++; 110 uio->uio_offset += DE_SIZE; 111 } 112 if (limit == 0) 113 return 0; 114 if (offset != np->n_dirofs || np->n_dirseq == NULL) { 115 SMBVDEBUG("Reopening search %ld:%ld\n", offset, np->n_dirofs); 116 if (np->n_dirseq) { 117 smbfs_findclose(np->n_dirseq, &scred); 118 np->n_dirseq = NULL; 119 } 120 np->n_dirofs = 2; 121 error = smbfs_findopen(np, "*", 1, 122 SMB_FA_SYSTEM | SMB_FA_HIDDEN | SMB_FA_DIR, 123 &scred, &ctx); 124 if (error) { 125 SMBVDEBUG("can not open search, error = %d", error); 126 return error; 127 } 128 np->n_dirseq = ctx; 129 } else 130 ctx = np->n_dirseq; 131 while (np->n_dirofs < offset) { 132 error = smbfs_findnext(ctx, offset - np->n_dirofs++, &scred); 133 if (error) { 134 smbfs_findclose(np->n_dirseq, &scred); 135 np->n_dirseq = NULL; 136 return error == ENOENT ? 0 : error; 137 } 138 } 139 error = 0; 140 for (; limit; limit--, offset++) { 141 error = smbfs_findnext(ctx, limit, &scred); 142 if (error) 143 break; 144 np->n_dirofs++; 145 bzero((caddr_t)&de, DE_SIZE); 146 de.d_reclen = DE_SIZE; 147 de.d_fileno = ctx->f_attr.fa_ino; 148 de.d_type = (ctx->f_attr.fa_attr & SMB_FA_DIR) ? DT_DIR : DT_REG; 149 de.d_namlen = ctx->f_nmlen; 150 bcopy(ctx->f_name, de.d_name, de.d_namlen); 151 de.d_name[de.d_namlen] = '\0'; 152 if (smbfs_fastlookup) { 153 error = smbfs_nget(vp->v_mount, vp, ctx->f_name, 154 ctx->f_nmlen, &ctx->f_attr, &newvp); 155 if (!error) { 156 cn.cn_nameptr = de.d_name; 157 cn.cn_namelen = de.d_namlen; 158 cache_enter(vp, newvp, &cn); 159 vput(newvp); 160 } 161 } 162 error = uiomove(&de, DE_SIZE, uio); 163 if (error) 164 break; 165 } 166 if (error == ENOENT) 167 error = 0; 168 uio->uio_offset = offset * DE_SIZE; 169 return error; 170 } 171 172 int 173 smbfs_readvnode(struct vnode *vp, struct uio *uiop, struct ucred *cred) 174 { 175 struct smbmount *smp = VFSTOSMBFS(vp->v_mount); 176 struct smbnode *np = VTOSMB(vp); 177 struct thread *td; 178 struct vattr vattr; 179 struct smb_cred scred; 180 int error, lks; 181 182 /* 183 * Protect against method which is not supported for now 184 */ 185 if (uiop->uio_segflg == UIO_NOCOPY) 186 return EOPNOTSUPP; 187 188 if (vp->v_type != VREG && vp->v_type != VDIR) { 189 SMBFSERR("vn types other than VREG or VDIR are unsupported !\n"); 190 return EIO; 191 } 192 if (uiop->uio_resid == 0) 193 return 0; 194 if (uiop->uio_offset < 0) 195 return EINVAL; 196 /* if (uiop->uio_offset + uiop->uio_resid > smp->nm_maxfilesize) 197 return EFBIG;*/ 198 td = uiop->uio_td; 199 if (vp->v_type == VDIR) { 200 lks = LK_EXCLUSIVE; /* lockstatus(vp->v_vnlock); */ 201 if (lks == LK_SHARED) 202 vn_lock(vp, LK_UPGRADE | LK_RETRY); 203 error = smbfs_readvdir(vp, uiop, cred); 204 if (lks == LK_SHARED) 205 vn_lock(vp, LK_DOWNGRADE | LK_RETRY); 206 return error; 207 } 208 209 /* biosize = SSTOCN(smp->sm_share)->sc_txmax;*/ 210 if (np->n_flag & NMODIFIED) { 211 smbfs_attr_cacheremove(vp); 212 error = VOP_GETATTR(vp, &vattr, cred); 213 if (error) 214 return error; 215 np->n_mtime.tv_sec = vattr.va_mtime.tv_sec; 216 } else { 217 error = VOP_GETATTR(vp, &vattr, cred); 218 if (error) 219 return error; 220 if (np->n_mtime.tv_sec != vattr.va_mtime.tv_sec) { 221 error = smbfs_vinvalbuf(vp, td); 222 if (error) 223 return error; 224 np->n_mtime.tv_sec = vattr.va_mtime.tv_sec; 225 } 226 } 227 smb_makescred(&scred, td, cred); 228 return smb_read(smp->sm_share, np->n_fid, uiop, &scred); 229 } 230 231 int 232 smbfs_writevnode(struct vnode *vp, struct uio *uiop, 233 struct ucred *cred, int ioflag) 234 { 235 struct smbmount *smp = VTOSMBFS(vp); 236 struct smbnode *np = VTOSMB(vp); 237 struct smb_cred scred; 238 struct proc *p; 239 struct thread *td; 240 int error = 0; 241 242 if (vp->v_type != VREG) { 243 SMBERROR("vn types other than VREG unsupported !\n"); 244 return EIO; 245 } 246 SMBVDEBUG("ofs=%d,resid=%d\n",(int)uiop->uio_offset, uiop->uio_resid); 247 if (uiop->uio_offset < 0) 248 return EINVAL; 249 /* if (uiop->uio_offset + uiop->uio_resid > smp->nm_maxfilesize) 250 return (EFBIG);*/ 251 td = uiop->uio_td; 252 p = td->td_proc; 253 if (ioflag & (IO_APPEND | IO_SYNC)) { 254 if (np->n_flag & NMODIFIED) { 255 smbfs_attr_cacheremove(vp); 256 error = smbfs_vinvalbuf(vp, td); 257 if (error) 258 return error; 259 } 260 if (ioflag & IO_APPEND) { 261 #ifdef notyet 262 /* 263 * File size can be changed by another client 264 */ 265 smbfs_attr_cacheremove(vp); 266 error = VOP_GETATTR(vp, &vattr, cred); 267 if (error) return (error); 268 #endif 269 uiop->uio_offset = np->n_size; 270 } 271 } 272 if (uiop->uio_resid == 0) 273 return 0; 274 if (p != NULL) { 275 PROC_LOCK(p); 276 if (uiop->uio_offset + uiop->uio_resid > 277 lim_cur(p, RLIMIT_FSIZE)) { 278 psignal(p, SIGXFSZ); 279 PROC_UNLOCK(p); 280 return EFBIG; 281 } 282 PROC_UNLOCK(p); 283 } 284 smb_makescred(&scred, td, cred); 285 error = smb_write(smp->sm_share, np->n_fid, uiop, &scred); 286 SMBVDEBUG("after: ofs=%d,resid=%d\n",(int)uiop->uio_offset, uiop->uio_resid); 287 if (!error) { 288 if (uiop->uio_offset > np->n_size) { 289 np->n_size = uiop->uio_offset; 290 vnode_pager_setsize(vp, np->n_size); 291 } 292 } 293 return error; 294 } 295 296 /* 297 * Do an I/O operation to/from a cache block. 298 */ 299 int 300 smbfs_doio(struct vnode *vp, struct buf *bp, struct ucred *cr, struct thread *td) 301 { 302 struct smbmount *smp = VFSTOSMBFS(vp->v_mount); 303 struct smbnode *np = VTOSMB(vp); 304 struct uio uio, *uiop = &uio; 305 struct iovec io; 306 struct smb_cred scred; 307 int error = 0; 308 309 uiop->uio_iov = &io; 310 uiop->uio_iovcnt = 1; 311 uiop->uio_segflg = UIO_SYSSPACE; 312 uiop->uio_td = td; 313 314 smb_makescred(&scred, td, cr); 315 316 if (bp->b_iocmd == BIO_READ) { 317 io.iov_len = uiop->uio_resid = bp->b_bcount; 318 io.iov_base = bp->b_data; 319 uiop->uio_rw = UIO_READ; 320 switch (vp->v_type) { 321 case VREG: 322 uiop->uio_offset = ((off_t)bp->b_blkno) * DEV_BSIZE; 323 error = smb_read(smp->sm_share, np->n_fid, uiop, &scred); 324 if (error) 325 break; 326 if (uiop->uio_resid) { 327 int left = uiop->uio_resid; 328 int nread = bp->b_bcount - left; 329 if (left > 0) 330 bzero((char *)bp->b_data + nread, left); 331 } 332 break; 333 default: 334 printf("smbfs_doio: type %x unexpected\n",vp->v_type); 335 break; 336 }; 337 if (error) { 338 bp->b_error = error; 339 bp->b_ioflags |= BIO_ERROR; 340 } 341 } else { /* write */ 342 if (((bp->b_blkno * DEV_BSIZE) + bp->b_dirtyend) > np->n_size) 343 bp->b_dirtyend = np->n_size - (bp->b_blkno * DEV_BSIZE); 344 345 if (bp->b_dirtyend > bp->b_dirtyoff) { 346 io.iov_len = uiop->uio_resid = bp->b_dirtyend - bp->b_dirtyoff; 347 uiop->uio_offset = ((off_t)bp->b_blkno) * DEV_BSIZE + bp->b_dirtyoff; 348 io.iov_base = (char *)bp->b_data + bp->b_dirtyoff; 349 uiop->uio_rw = UIO_WRITE; 350 error = smb_write(smp->sm_share, np->n_fid, uiop, &scred); 351 352 /* 353 * For an interrupted write, the buffer is still valid 354 * and the write hasn't been pushed to the server yet, 355 * so we can't set BIO_ERROR and report the interruption 356 * by setting B_EINTR. For the B_ASYNC case, B_EINTR 357 * is not relevant, so the rpc attempt is essentially 358 * a noop. For the case of a V3 write rpc not being 359 * committed to stable storage, the block is still 360 * dirty and requires either a commit rpc or another 361 * write rpc with iomode == NFSV3WRITE_FILESYNC before 362 * the block is reused. This is indicated by setting 363 * the B_DELWRI and B_NEEDCOMMIT flags. 364 */ 365 if (error == EINTR 366 || (!error && (bp->b_flags & B_NEEDCOMMIT))) { 367 int s; 368 369 s = splbio(); 370 bp->b_flags &= ~(B_INVAL|B_NOCACHE); 371 if ((bp->b_flags & B_ASYNC) == 0) 372 bp->b_flags |= B_EINTR; 373 if ((bp->b_flags & B_PAGING) == 0) { 374 bdirty(bp); 375 bp->b_flags &= ~B_DONE; 376 } 377 if ((bp->b_flags & B_ASYNC) == 0) 378 bp->b_flags |= B_EINTR; 379 splx(s); 380 } else { 381 if (error) { 382 bp->b_ioflags |= BIO_ERROR; 383 bp->b_error = error; 384 } 385 bp->b_dirtyoff = bp->b_dirtyend = 0; 386 } 387 } else { 388 bp->b_resid = 0; 389 bufdone(bp); 390 return 0; 391 } 392 } 393 bp->b_resid = uiop->uio_resid; 394 bufdone(bp); 395 return error; 396 } 397 398 /* 399 * Vnode op for VM getpages. 400 * Wish wish .... get rid from multiple IO routines 401 */ 402 int 403 smbfs_getpages(ap) 404 struct vop_getpages_args /* { 405 struct vnode *a_vp; 406 vm_page_t *a_m; 407 int a_count; 408 int a_reqpage; 409 vm_ooffset_t a_offset; 410 } */ *ap; 411 { 412 #ifdef SMBFS_RWGENERIC 413 return vop_stdgetpages(ap); 414 #else 415 int i, error, nextoff, size, toff, npages, count, reqpage; 416 struct uio uio; 417 struct iovec iov; 418 vm_offset_t kva; 419 struct buf *bp; 420 struct vnode *vp; 421 struct thread *td; 422 struct ucred *cred; 423 struct smbmount *smp; 424 struct smbnode *np; 425 struct smb_cred scred; 426 vm_object_t object; 427 vm_page_t *pages, m; 428 429 vp = ap->a_vp; 430 if ((object = vp->v_object) == NULL) { 431 printf("smbfs_getpages: called with non-merged cache vnode??\n"); 432 return VM_PAGER_ERROR; 433 } 434 435 td = curthread; /* XXX */ 436 cred = td->td_ucred; /* XXX */ 437 np = VTOSMB(vp); 438 smp = VFSTOSMBFS(vp->v_mount); 439 pages = ap->a_m; 440 count = ap->a_count; 441 npages = btoc(count); 442 reqpage = ap->a_reqpage; 443 444 /* 445 * If the requested page is partially valid, just return it and 446 * allow the pager to zero-out the blanks. Partially valid pages 447 * can only occur at the file EOF. 448 */ 449 m = pages[reqpage]; 450 451 VM_OBJECT_LOCK(object); 452 if (m->valid != 0) { 453 vm_page_lock_queues(); 454 for (i = 0; i < npages; ++i) { 455 if (i != reqpage) 456 vm_page_free(pages[i]); 457 } 458 vm_page_unlock_queues(); 459 VM_OBJECT_UNLOCK(object); 460 return 0; 461 } 462 VM_OBJECT_UNLOCK(object); 463 464 smb_makescred(&scred, td, cred); 465 466 bp = getpbuf(&smbfs_pbuf_freecnt); 467 468 kva = (vm_offset_t) bp->b_data; 469 pmap_qenter(kva, pages, npages); 470 PCPU_INC(cnt.v_vnodein); 471 PCPU_ADD(cnt.v_vnodepgsin, npages); 472 473 iov.iov_base = (caddr_t) kva; 474 iov.iov_len = count; 475 uio.uio_iov = &iov; 476 uio.uio_iovcnt = 1; 477 uio.uio_offset = IDX_TO_OFF(pages[0]->pindex); 478 uio.uio_resid = count; 479 uio.uio_segflg = UIO_SYSSPACE; 480 uio.uio_rw = UIO_READ; 481 uio.uio_td = td; 482 483 error = smb_read(smp->sm_share, np->n_fid, &uio, &scred); 484 pmap_qremove(kva, npages); 485 486 relpbuf(bp, &smbfs_pbuf_freecnt); 487 488 VM_OBJECT_LOCK(object); 489 if (error && (uio.uio_resid == count)) { 490 printf("smbfs_getpages: error %d\n",error); 491 vm_page_lock_queues(); 492 for (i = 0; i < npages; i++) { 493 if (reqpage != i) 494 vm_page_free(pages[i]); 495 } 496 vm_page_unlock_queues(); 497 VM_OBJECT_UNLOCK(object); 498 return VM_PAGER_ERROR; 499 } 500 501 size = count - uio.uio_resid; 502 503 vm_page_lock_queues(); 504 for (i = 0, toff = 0; i < npages; i++, toff = nextoff) { 505 vm_page_t m; 506 nextoff = toff + PAGE_SIZE; 507 m = pages[i]; 508 509 if (nextoff <= size) { 510 /* 511 * Read operation filled an entire page 512 */ 513 m->valid = VM_PAGE_BITS_ALL; 514 KASSERT(m->dirty == 0, 515 ("smbfs_getpages: page %p is dirty", m)); 516 } else if (size > toff) { 517 /* 518 * Read operation filled a partial page. 519 */ 520 m->valid = 0; 521 vm_page_set_valid(m, 0, size - toff); 522 KASSERT(m->dirty == 0, 523 ("smbfs_getpages: page %p is dirty", m)); 524 } else { 525 /* 526 * Read operation was short. If no error occured 527 * we may have hit a zero-fill section. We simply 528 * leave valid set to 0. 529 */ 530 ; 531 } 532 533 if (i != reqpage) { 534 /* 535 * Whether or not to leave the page activated is up in 536 * the air, but we should put the page on a page queue 537 * somewhere (it already is in the object). Result: 538 * It appears that emperical results show that 539 * deactivating pages is best. 540 */ 541 542 /* 543 * Just in case someone was asking for this page we 544 * now tell them that it is ok to use. 545 */ 546 if (!error) { 547 if (m->oflags & VPO_WANTED) 548 vm_page_activate(m); 549 else 550 vm_page_deactivate(m); 551 vm_page_wakeup(m); 552 } else { 553 vm_page_free(m); 554 } 555 } 556 } 557 vm_page_unlock_queues(); 558 VM_OBJECT_UNLOCK(object); 559 return 0; 560 #endif /* SMBFS_RWGENERIC */ 561 } 562 563 /* 564 * Vnode op for VM putpages. 565 * possible bug: all IO done in sync mode 566 * Note that vop_close always invalidate pages before close, so it's 567 * not necessary to open vnode. 568 */ 569 int 570 smbfs_putpages(ap) 571 struct vop_putpages_args /* { 572 struct vnode *a_vp; 573 vm_page_t *a_m; 574 int a_count; 575 int a_sync; 576 int *a_rtvals; 577 vm_ooffset_t a_offset; 578 } */ *ap; 579 { 580 int error; 581 struct vnode *vp = ap->a_vp; 582 struct thread *td; 583 struct ucred *cred; 584 585 #ifdef SMBFS_RWGENERIC 586 td = curthread; /* XXX */ 587 cred = td->td_ucred; /* XXX */ 588 VOP_OPEN(vp, FWRITE, cred, td, NULL); 589 error = vop_stdputpages(ap); 590 VOP_CLOSE(vp, FWRITE, cred, td); 591 return error; 592 #else 593 struct uio uio; 594 struct iovec iov; 595 vm_offset_t kva; 596 struct buf *bp; 597 int i, npages, count; 598 int *rtvals; 599 struct smbmount *smp; 600 struct smbnode *np; 601 struct smb_cred scred; 602 vm_page_t *pages; 603 604 td = curthread; /* XXX */ 605 cred = td->td_ucred; /* XXX */ 606 /* VOP_OPEN(vp, FWRITE, cred, td, NULL);*/ 607 np = VTOSMB(vp); 608 smp = VFSTOSMBFS(vp->v_mount); 609 pages = ap->a_m; 610 count = ap->a_count; 611 rtvals = ap->a_rtvals; 612 npages = btoc(count); 613 614 for (i = 0; i < npages; i++) { 615 rtvals[i] = VM_PAGER_AGAIN; 616 } 617 618 bp = getpbuf(&smbfs_pbuf_freecnt); 619 620 kva = (vm_offset_t) bp->b_data; 621 pmap_qenter(kva, pages, npages); 622 PCPU_INC(cnt.v_vnodeout); 623 PCPU_ADD(cnt.v_vnodepgsout, count); 624 625 iov.iov_base = (caddr_t) kva; 626 iov.iov_len = count; 627 uio.uio_iov = &iov; 628 uio.uio_iovcnt = 1; 629 uio.uio_offset = IDX_TO_OFF(pages[0]->pindex); 630 uio.uio_resid = count; 631 uio.uio_segflg = UIO_SYSSPACE; 632 uio.uio_rw = UIO_WRITE; 633 uio.uio_td = td; 634 SMBVDEBUG("ofs=%d,resid=%d\n",(int)uio.uio_offset, uio.uio_resid); 635 636 smb_makescred(&scred, td, cred); 637 error = smb_write(smp->sm_share, np->n_fid, &uio, &scred); 638 /* VOP_CLOSE(vp, FWRITE, cred, td);*/ 639 SMBVDEBUG("paged write done: %d\n", error); 640 641 pmap_qremove(kva, npages); 642 643 relpbuf(bp, &smbfs_pbuf_freecnt); 644 645 if (!error) { 646 int nwritten = round_page(count - uio.uio_resid) / PAGE_SIZE; 647 vm_page_lock_queues(); 648 for (i = 0; i < nwritten; i++) { 649 rtvals[i] = VM_PAGER_OK; 650 vm_page_undirty(pages[i]); 651 } 652 vm_page_unlock_queues(); 653 } 654 return rtvals[0]; 655 #endif /* SMBFS_RWGENERIC */ 656 } 657 658 /* 659 * Flush and invalidate all dirty buffers. If another process is already 660 * doing the flush, just wait for completion. 661 */ 662 int 663 smbfs_vinvalbuf(struct vnode *vp, struct thread *td) 664 { 665 struct smbnode *np = VTOSMB(vp); 666 int error = 0; 667 668 if (vp->v_iflag & VI_DOOMED) 669 return 0; 670 671 while (np->n_flag & NFLUSHINPROG) { 672 np->n_flag |= NFLUSHWANT; 673 error = tsleep(&np->n_flag, PRIBIO + 2, "smfsvinv", 2 * hz); 674 error = smb_td_intr(td); 675 if (error == EINTR) 676 return EINTR; 677 } 678 np->n_flag |= NFLUSHINPROG; 679 680 if (vp->v_bufobj.bo_object != NULL) { 681 VM_OBJECT_LOCK(vp->v_bufobj.bo_object); 682 vm_object_page_clean(vp->v_bufobj.bo_object, 0, 0, OBJPC_SYNC); 683 VM_OBJECT_UNLOCK(vp->v_bufobj.bo_object); 684 } 685 686 error = vinvalbuf(vp, V_SAVE, PCATCH, 0); 687 while (error) { 688 if (error == ERESTART || error == EINTR) { 689 np->n_flag &= ~NFLUSHINPROG; 690 if (np->n_flag & NFLUSHWANT) { 691 np->n_flag &= ~NFLUSHWANT; 692 wakeup(&np->n_flag); 693 } 694 return EINTR; 695 } 696 error = vinvalbuf(vp, V_SAVE, PCATCH, 0); 697 } 698 np->n_flag &= ~(NMODIFIED | NFLUSHINPROG); 699 if (np->n_flag & NFLUSHWANT) { 700 np->n_flag &= ~NFLUSHWANT; 701 wakeup(&np->n_flag); 702 } 703 return (error); 704 } 705