smbfs_io.c revision 191964
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 * 3. All advertising materials mentioning features or use of this software 14 * must display the following acknowledgement: 15 * This product includes software developed by Boris Popov. 16 * 4. Neither the name of the author nor the names of any co-contributors 17 * may be used to endorse or promote products derived from this software 18 * without specific prior written permission. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 30 * SUCH DAMAGE. 31 * 32 * $FreeBSD: head/sys/fs/smbfs/smbfs_io.c 191964 2009-05-10 17:05:43Z alc $ 33 * 34 */ 35#include <sys/param.h> 36#include <sys/systm.h> 37#include <sys/resourcevar.h> /* defines plimit structure in proc struct */ 38#include <sys/kernel.h> 39#include <sys/proc.h> 40#include <sys/fcntl.h> 41#include <sys/bio.h> 42#include <sys/buf.h> 43#include <sys/mount.h> 44#include <sys/namei.h> 45#include <sys/vnode.h> 46#include <sys/dirent.h> 47#include <sys/signalvar.h> 48#include <sys/sysctl.h> 49#include <sys/vmmeter.h> 50 51#include <vm/vm.h> 52#include <vm/vm_page.h> 53#include <vm/vm_extern.h> 54#include <vm/vm_object.h> 55#include <vm/vm_pager.h> 56#include <vm/vnode_pager.h> 57/* 58#include <sys/ioccom.h> 59*/ 60#include <netsmb/smb.h> 61#include <netsmb/smb_conn.h> 62#include <netsmb/smb_subr.h> 63 64#include <fs/smbfs/smbfs.h> 65#include <fs/smbfs/smbfs_node.h> 66#include <fs/smbfs/smbfs_subr.h> 67 68/*#define SMBFS_RWGENERIC*/ 69 70extern int smbfs_pbuf_freecnt; 71 72static int smbfs_fastlookup = 1; 73 74SYSCTL_DECL(_vfs_smbfs); 75SYSCTL_INT(_vfs_smbfs, OID_AUTO, fastlookup, CTLFLAG_RW, &smbfs_fastlookup, 0, ""); 76 77 78#define DE_SIZE (sizeof(struct dirent)) 79 80static int 81smbfs_readvdir(struct vnode *vp, struct uio *uio, struct ucred *cred) 82{ 83 struct dirent de; 84 struct componentname cn; 85 struct smb_cred scred; 86 struct smbfs_fctx *ctx; 87 struct vnode *newvp; 88 struct smbnode *np = VTOSMB(vp); 89 int error/*, *eofflag = ap->a_eofflag*/; 90 long offset, limit; 91 92 np = VTOSMB(vp); 93 SMBVDEBUG("dirname='%s'\n", np->n_name); 94 smb_makescred(&scred, uio->uio_td, cred); 95 offset = uio->uio_offset / DE_SIZE; /* offset in the directory */ 96 limit = uio->uio_resid / DE_SIZE; 97 if (uio->uio_resid < DE_SIZE || uio->uio_offset < 0) 98 return EINVAL; 99 while (limit && offset < 2) { 100 limit--; 101 bzero((caddr_t)&de, DE_SIZE); 102 de.d_reclen = DE_SIZE; 103 de.d_fileno = (offset == 0) ? np->n_ino : 104 (np->n_parent ? VTOSMB(np->n_parent)->n_ino : 2); 105 if (de.d_fileno == 0) 106 de.d_fileno = 0x7ffffffd + offset; 107 de.d_namlen = offset + 1; 108 de.d_name[0] = '.'; 109 de.d_name[1] = '.'; 110 de.d_name[offset + 1] = '\0'; 111 de.d_type = DT_DIR; 112 error = uiomove(&de, DE_SIZE, uio); 113 if (error) 114 return error; 115 offset++; 116 uio->uio_offset += DE_SIZE; 117 } 118 if (limit == 0) 119 return 0; 120 if (offset != np->n_dirofs || np->n_dirseq == NULL) { 121 SMBVDEBUG("Reopening search %ld:%ld\n", offset, np->n_dirofs); 122 if (np->n_dirseq) { 123 smbfs_findclose(np->n_dirseq, &scred); 124 np->n_dirseq = NULL; 125 } 126 np->n_dirofs = 2; 127 error = smbfs_findopen(np, "*", 1, 128 SMB_FA_SYSTEM | SMB_FA_HIDDEN | SMB_FA_DIR, 129 &scred, &ctx); 130 if (error) { 131 SMBVDEBUG("can not open search, error = %d", error); 132 return error; 133 } 134 np->n_dirseq = ctx; 135 } else 136 ctx = np->n_dirseq; 137 while (np->n_dirofs < offset) { 138 error = smbfs_findnext(ctx, offset - np->n_dirofs++, &scred); 139 if (error) { 140 smbfs_findclose(np->n_dirseq, &scred); 141 np->n_dirseq = NULL; 142 return error == ENOENT ? 0 : error; 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 return error; 176} 177 178int 179smbfs_readvnode(struct vnode *vp, struct uio *uiop, struct ucred *cred) 180{ 181 struct smbmount *smp = VFSTOSMBFS(vp->v_mount); 182 struct smbnode *np = VTOSMB(vp); 183 struct thread *td; 184 struct vattr vattr; 185 struct smb_cred scred; 186 int error, lks; 187 188 /* 189 * Protect against method which is not supported for now 190 */ 191 if (uiop->uio_segflg == UIO_NOCOPY) 192 return EOPNOTSUPP; 193 194 if (vp->v_type != VREG && vp->v_type != VDIR) { 195 SMBFSERR("vn types other than VREG or VDIR are unsupported !\n"); 196 return EIO; 197 } 198 if (uiop->uio_resid == 0) 199 return 0; 200 if (uiop->uio_offset < 0) 201 return EINVAL; 202/* if (uiop->uio_offset + uiop->uio_resid > smp->nm_maxfilesize) 203 return EFBIG;*/ 204 td = uiop->uio_td; 205 if (vp->v_type == VDIR) { 206 lks = LK_EXCLUSIVE; /* lockstatus(vp->v_vnlock); */ 207 if (lks == LK_SHARED) 208 vn_lock(vp, LK_UPGRADE | LK_RETRY); 209 error = smbfs_readvdir(vp, uiop, cred); 210 if (lks == LK_SHARED) 211 vn_lock(vp, LK_DOWNGRADE | LK_RETRY); 212 return error; 213 } 214 215/* biosize = SSTOCN(smp->sm_share)->sc_txmax;*/ 216 if (np->n_flag & NMODIFIED) { 217 smbfs_attr_cacheremove(vp); 218 error = VOP_GETATTR(vp, &vattr, cred); 219 if (error) 220 return error; 221 np->n_mtime.tv_sec = vattr.va_mtime.tv_sec; 222 } else { 223 error = VOP_GETATTR(vp, &vattr, cred); 224 if (error) 225 return error; 226 if (np->n_mtime.tv_sec != vattr.va_mtime.tv_sec) { 227 error = smbfs_vinvalbuf(vp, td); 228 if (error) 229 return error; 230 np->n_mtime.tv_sec = vattr.va_mtime.tv_sec; 231 } 232 } 233 smb_makescred(&scred, td, cred); 234 return smb_read(smp->sm_share, np->n_fid, uiop, &scred); 235} 236 237int 238smbfs_writevnode(struct vnode *vp, struct uio *uiop, 239 struct ucred *cred, int ioflag) 240{ 241 struct smbmount *smp = VTOSMBFS(vp); 242 struct smbnode *np = VTOSMB(vp); 243 struct smb_cred scred; 244 struct proc *p; 245 struct thread *td; 246 int error = 0; 247 248 if (vp->v_type != VREG) { 249 SMBERROR("vn types other than VREG unsupported !\n"); 250 return EIO; 251 } 252 SMBVDEBUG("ofs=%d,resid=%d\n",(int)uiop->uio_offset, uiop->uio_resid); 253 if (uiop->uio_offset < 0) 254 return EINVAL; 255/* if (uiop->uio_offset + uiop->uio_resid > smp->nm_maxfilesize) 256 return (EFBIG);*/ 257 td = uiop->uio_td; 258 p = td->td_proc; 259 if (ioflag & (IO_APPEND | IO_SYNC)) { 260 if (np->n_flag & NMODIFIED) { 261 smbfs_attr_cacheremove(vp); 262 error = smbfs_vinvalbuf(vp, td); 263 if (error) 264 return error; 265 } 266 if (ioflag & IO_APPEND) { 267#ifdef notyet 268 /* 269 * File size can be changed by another client 270 */ 271 smbfs_attr_cacheremove(vp); 272 error = VOP_GETATTR(vp, &vattr, cred); 273 if (error) return (error); 274#endif 275 uiop->uio_offset = np->n_size; 276 } 277 } 278 if (uiop->uio_resid == 0) 279 return 0; 280 if (p != NULL) { 281 PROC_LOCK(p); 282 if (uiop->uio_offset + uiop->uio_resid > 283 lim_cur(p, RLIMIT_FSIZE)) { 284 psignal(p, SIGXFSZ); 285 PROC_UNLOCK(p); 286 return EFBIG; 287 } 288 PROC_UNLOCK(p); 289 } 290 smb_makescred(&scred, td, cred); 291 error = smb_write(smp->sm_share, np->n_fid, uiop, &scred); 292 SMBVDEBUG("after: ofs=%d,resid=%d\n",(int)uiop->uio_offset, 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 */ 305int 306smbfs_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 uio, *uiop = &uio; 311 struct iovec io; 312 struct smb_cred scred; 313 int error = 0; 314 315 uiop->uio_iov = &io; 316 uiop->uio_iovcnt = 1; 317 uiop->uio_segflg = UIO_SYSSPACE; 318 uiop->uio_td = td; 319 320 smb_makescred(&scred, td, cr); 321 322 if (bp->b_iocmd == BIO_READ) { 323 io.iov_len = uiop->uio_resid = bp->b_bcount; 324 io.iov_base = bp->b_data; 325 uiop->uio_rw = UIO_READ; 326 switch (vp->v_type) { 327 case VREG: 328 uiop->uio_offset = ((off_t)bp->b_blkno) * DEV_BSIZE; 329 error = smb_read(smp->sm_share, np->n_fid, uiop, &scred); 330 if (error) 331 break; 332 if (uiop->uio_resid) { 333 int left = uiop->uio_resid; 334 int nread = bp->b_bcount - left; 335 if (left > 0) 336 bzero((char *)bp->b_data + nread, left); 337 } 338 break; 339 default: 340 printf("smbfs_doio: type %x unexpected\n",vp->v_type); 341 break; 342 }; 343 if (error) { 344 bp->b_error = error; 345 bp->b_ioflags |= BIO_ERROR; 346 } 347 } else { /* write */ 348 if (((bp->b_blkno * DEV_BSIZE) + bp->b_dirtyend) > np->n_size) 349 bp->b_dirtyend = np->n_size - (bp->b_blkno * DEV_BSIZE); 350 351 if (bp->b_dirtyend > bp->b_dirtyoff) { 352 io.iov_len = uiop->uio_resid = bp->b_dirtyend - bp->b_dirtyoff; 353 uiop->uio_offset = ((off_t)bp->b_blkno) * DEV_BSIZE + bp->b_dirtyoff; 354 io.iov_base = (char *)bp->b_data + bp->b_dirtyoff; 355 uiop->uio_rw = UIO_WRITE; 356 error = smb_write(smp->sm_share, np->n_fid, uiop, &scred); 357 358 /* 359 * For an interrupted write, the buffer is still valid 360 * and the write hasn't been pushed to the server yet, 361 * so we can't set BIO_ERROR and report the interruption 362 * by setting B_EINTR. For the B_ASYNC case, B_EINTR 363 * is not relevant, so the rpc attempt is essentially 364 * a noop. For the case of a V3 write rpc not being 365 * committed to stable storage, the block is still 366 * dirty and requires either a commit rpc or another 367 * write rpc with iomode == NFSV3WRITE_FILESYNC before 368 * the block is reused. This is indicated by setting 369 * the B_DELWRI and B_NEEDCOMMIT flags. 370 */ 371 if (error == EINTR 372 || (!error && (bp->b_flags & B_NEEDCOMMIT))) { 373 int s; 374 375 s = splbio(); 376 bp->b_flags &= ~(B_INVAL|B_NOCACHE); 377 if ((bp->b_flags & B_ASYNC) == 0) 378 bp->b_flags |= B_EINTR; 379 if ((bp->b_flags & B_PAGING) == 0) { 380 bdirty(bp); 381 bp->b_flags &= ~B_DONE; 382 } 383 if ((bp->b_flags & B_ASYNC) == 0) 384 bp->b_flags |= B_EINTR; 385 splx(s); 386 } else { 387 if (error) { 388 bp->b_ioflags |= BIO_ERROR; 389 bp->b_error = error; 390 } 391 bp->b_dirtyoff = bp->b_dirtyend = 0; 392 } 393 } else { 394 bp->b_resid = 0; 395 bufdone(bp); 396 return 0; 397 } 398 } 399 bp->b_resid = uiop->uio_resid; 400 bufdone(bp); 401 return error; 402} 403 404/* 405 * Vnode op for VM getpages. 406 * Wish wish .... get rid from multiple IO routines 407 */ 408int 409smbfs_getpages(ap) 410 struct vop_getpages_args /* { 411 struct vnode *a_vp; 412 vm_page_t *a_m; 413 int a_count; 414 int a_reqpage; 415 vm_ooffset_t a_offset; 416 } */ *ap; 417{ 418#ifdef SMBFS_RWGENERIC 419 return vop_stdgetpages(ap); 420#else 421 int i, error, nextoff, size, toff, npages, count, reqpage; 422 struct uio uio; 423 struct iovec iov; 424 vm_offset_t kva; 425 struct buf *bp; 426 struct vnode *vp; 427 struct thread *td; 428 struct ucred *cred; 429 struct smbmount *smp; 430 struct smbnode *np; 431 struct smb_cred scred; 432 vm_object_t object; 433 vm_page_t *pages, m; 434 435 vp = ap->a_vp; 436 if ((object = vp->v_object) == NULL) { 437 printf("smbfs_getpages: called with non-merged cache vnode??\n"); 438 return VM_PAGER_ERROR; 439 } 440 441 td = curthread; /* XXX */ 442 cred = td->td_ucred; /* XXX */ 443 np = VTOSMB(vp); 444 smp = VFSTOSMBFS(vp->v_mount); 445 pages = ap->a_m; 446 count = ap->a_count; 447 npages = btoc(count); 448 reqpage = ap->a_reqpage; 449 450 /* 451 * If the requested page is partially valid, just return it and 452 * allow the pager to zero-out the blanks. Partially valid pages 453 * can only occur at the file EOF. 454 */ 455 m = pages[reqpage]; 456 457 VM_OBJECT_LOCK(object); 458 if (m->valid != 0) { 459 vm_page_lock_queues(); 460 for (i = 0; i < npages; ++i) { 461 if (i != reqpage) 462 vm_page_free(pages[i]); 463 } 464 vm_page_unlock_queues(); 465 VM_OBJECT_UNLOCK(object); 466 return 0; 467 } 468 VM_OBJECT_UNLOCK(object); 469 470 smb_makescred(&scred, td, cred); 471 472 bp = getpbuf(&smbfs_pbuf_freecnt); 473 474 kva = (vm_offset_t) bp->b_data; 475 pmap_qenter(kva, pages, npages); 476 PCPU_INC(cnt.v_vnodein); 477 PCPU_ADD(cnt.v_vnodepgsin, npages); 478 479 iov.iov_base = (caddr_t) kva; 480 iov.iov_len = count; 481 uio.uio_iov = &iov; 482 uio.uio_iovcnt = 1; 483 uio.uio_offset = IDX_TO_OFF(pages[0]->pindex); 484 uio.uio_resid = count; 485 uio.uio_segflg = UIO_SYSSPACE; 486 uio.uio_rw = UIO_READ; 487 uio.uio_td = td; 488 489 error = smb_read(smp->sm_share, np->n_fid, &uio, &scred); 490 pmap_qremove(kva, npages); 491 492 relpbuf(bp, &smbfs_pbuf_freecnt); 493 494 VM_OBJECT_LOCK(object); 495 if (error && (uio.uio_resid == count)) { 496 printf("smbfs_getpages: error %d\n",error); 497 vm_page_lock_queues(); 498 for (i = 0; i < npages; i++) { 499 if (reqpage != i) 500 vm_page_free(pages[i]); 501 } 502 vm_page_unlock_queues(); 503 VM_OBJECT_UNLOCK(object); 504 return VM_PAGER_ERROR; 505 } 506 507 size = count - uio.uio_resid; 508 509 vm_page_lock_queues(); 510 for (i = 0, toff = 0; i < npages; i++, toff = nextoff) { 511 vm_page_t m; 512 nextoff = toff + PAGE_SIZE; 513 m = pages[i]; 514 515 if (nextoff <= size) { 516 /* 517 * Read operation filled an entire page 518 */ 519 m->valid = VM_PAGE_BITS_ALL; 520 vm_page_undirty(m); 521 } else if (size > toff) { 522 /* 523 * Read operation filled a partial page. 524 */ 525 m->valid = 0; 526 vm_page_set_validclean(m, 0, size - toff); 527 } else { 528 /* 529 * Read operation was short. If no error occured 530 * we may have hit a zero-fill section. We simply 531 * leave valid set to 0. 532 */ 533 ; 534 } 535 536 if (i != reqpage) { 537 /* 538 * Whether or not to leave the page activated is up in 539 * the air, but we should put the page on a page queue 540 * somewhere (it already is in the object). Result: 541 * It appears that emperical results show that 542 * deactivating pages is best. 543 */ 544 545 /* 546 * Just in case someone was asking for this page we 547 * now tell them that it is ok to use. 548 */ 549 if (!error) { 550 if (m->oflags & VPO_WANTED) 551 vm_page_activate(m); 552 else 553 vm_page_deactivate(m); 554 vm_page_wakeup(m); 555 } else { 556 vm_page_free(m); 557 } 558 } 559 } 560 vm_page_unlock_queues(); 561 VM_OBJECT_UNLOCK(object); 562 return 0; 563#endif /* SMBFS_RWGENERIC */ 564} 565 566/* 567 * Vnode op for VM putpages. 568 * possible bug: all IO done in sync mode 569 * Note that vop_close always invalidate pages before close, so it's 570 * not necessary to open vnode. 571 */ 572int 573smbfs_putpages(ap) 574 struct vop_putpages_args /* { 575 struct vnode *a_vp; 576 vm_page_t *a_m; 577 int a_count; 578 int a_sync; 579 int *a_rtvals; 580 vm_ooffset_t a_offset; 581 } */ *ap; 582{ 583 int error; 584 struct vnode *vp = ap->a_vp; 585 struct thread *td; 586 struct ucred *cred; 587 588#ifdef SMBFS_RWGENERIC 589 td = curthread; /* XXX */ 590 cred = td->td_ucred; /* XXX */ 591 VOP_OPEN(vp, FWRITE, cred, td, NULL); 592 error = vop_stdputpages(ap); 593 VOP_CLOSE(vp, FWRITE, cred, td); 594 return error; 595#else 596 struct uio uio; 597 struct iovec iov; 598 vm_offset_t kva; 599 struct buf *bp; 600 int i, npages, count; 601 int *rtvals; 602 struct smbmount *smp; 603 struct smbnode *np; 604 struct smb_cred scred; 605 vm_page_t *pages; 606 607 td = curthread; /* XXX */ 608 cred = td->td_ucred; /* XXX */ 609/* VOP_OPEN(vp, FWRITE, cred, td, NULL);*/ 610 np = VTOSMB(vp); 611 smp = VFSTOSMBFS(vp->v_mount); 612 pages = ap->a_m; 613 count = ap->a_count; 614 rtvals = ap->a_rtvals; 615 npages = btoc(count); 616 617 for (i = 0; i < npages; i++) { 618 rtvals[i] = VM_PAGER_AGAIN; 619 } 620 621 bp = getpbuf(&smbfs_pbuf_freecnt); 622 623 kva = (vm_offset_t) bp->b_data; 624 pmap_qenter(kva, pages, npages); 625 PCPU_INC(cnt.v_vnodeout); 626 PCPU_ADD(cnt.v_vnodepgsout, count); 627 628 iov.iov_base = (caddr_t) kva; 629 iov.iov_len = count; 630 uio.uio_iov = &iov; 631 uio.uio_iovcnt = 1; 632 uio.uio_offset = IDX_TO_OFF(pages[0]->pindex); 633 uio.uio_resid = count; 634 uio.uio_segflg = UIO_SYSSPACE; 635 uio.uio_rw = UIO_WRITE; 636 uio.uio_td = td; 637 SMBVDEBUG("ofs=%d,resid=%d\n",(int)uio.uio_offset, uio.uio_resid); 638 639 smb_makescred(&scred, td, cred); 640 error = smb_write(smp->sm_share, np->n_fid, &uio, &scred); 641/* VOP_CLOSE(vp, FWRITE, cred, td);*/ 642 SMBVDEBUG("paged write done: %d\n", error); 643 644 pmap_qremove(kva, npages); 645 646 relpbuf(bp, &smbfs_pbuf_freecnt); 647 648 if (!error) { 649 int nwritten = round_page(count - uio.uio_resid) / PAGE_SIZE; 650 vm_page_lock_queues(); 651 for (i = 0; i < nwritten; i++) { 652 rtvals[i] = VM_PAGER_OK; 653 vm_page_undirty(pages[i]); 654 } 655 vm_page_unlock_queues(); 656 } 657 return rtvals[0]; 658#endif /* SMBFS_RWGENERIC */ 659} 660 661/* 662 * Flush and invalidate all dirty buffers. If another process is already 663 * doing the flush, just wait for completion. 664 */ 665int 666smbfs_vinvalbuf(struct vnode *vp, struct thread *td) 667{ 668 struct smbnode *np = VTOSMB(vp); 669 int error = 0; 670 671 if (vp->v_iflag & VI_DOOMED) 672 return 0; 673 674 while (np->n_flag & NFLUSHINPROG) { 675 np->n_flag |= NFLUSHWANT; 676 error = tsleep(&np->n_flag, PRIBIO + 2, "smfsvinv", 2 * hz); 677 error = smb_td_intr(td); 678 if (error == EINTR) 679 return EINTR; 680 } 681 np->n_flag |= NFLUSHINPROG; 682 683 if (vp->v_bufobj.bo_object != NULL) { 684 VM_OBJECT_LOCK(vp->v_bufobj.bo_object); 685 vm_object_page_clean(vp->v_bufobj.bo_object, 0, 0, OBJPC_SYNC); 686 VM_OBJECT_UNLOCK(vp->v_bufobj.bo_object); 687 } 688 689 error = vinvalbuf(vp, V_SAVE, PCATCH, 0); 690 while (error) { 691 if (error == ERESTART || error == EINTR) { 692 np->n_flag &= ~NFLUSHINPROG; 693 if (np->n_flag & NFLUSHWANT) { 694 np->n_flag &= ~NFLUSHWANT; 695 wakeup(&np->n_flag); 696 } 697 return EINTR; 698 } 699 error = vinvalbuf(vp, V_SAVE, PCATCH, 0); 700 } 701 np->n_flag &= ~(NMODIFIED | NFLUSHINPROG); 702 if (np->n_flag & NFLUSHWANT) { 703 np->n_flag &= ~NFLUSHWANT; 704 wakeup(&np->n_flag); 705 } 706 return (error); 707} 708