Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)
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FreeBSD/Linux Kernel Cross Reference
sys/fs/smbfs/smbfs_io.c
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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 * $FreeBSD$ 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 70 extern int smbfs_pbuf_freecnt; 71 72 static int smbfs_fastlookup = 1; 73 74 SYSCTL_DECL(_vfs_smbfs); 75 SYSCTL_INT(_vfs_smbfs, OID_AUTO, fastlookup, CTLFLAG_RW, &smbfs_fastlookup, 0, ""); 76 77 78 #define DE_SIZE (sizeof(struct dirent)) 79 80 static int 81 smbfs_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 } 177 178 int 179 smbfs_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, td);*/ 207 if (lks == LK_SHARED) 208 vn_lock(vp, LK_UPGRADE | LK_RETRY, td); 209 error = smbfs_readvdir(vp, uiop, cred); 210 if (lks == LK_SHARED) 211 vn_lock(vp, LK_DOWNGRADE | LK_RETRY, td); 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, td); 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, td); 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 } 236 237 int 238 smbfs_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 #if notyet 268 /* 269 * File size can be changed by another client 270 */ 271 smbfs_attr_cacheremove(vp); 272 error = VOP_GETATTR(vp, &vattr, cred, td); 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 */ 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 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 */ 408 int 409 smbfs_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 /* handled by vm_fault now */ 460 /* vm_page_zero_invalid(m, TRUE); */ 461 vm_page_lock_queues(); 462 for (i = 0; i < npages; ++i) { 463 if (i != reqpage) 464 vm_page_free(pages[i]); 465 } 466 vm_page_unlock_queues(); 467 VM_OBJECT_UNLOCK(object); 468 return 0; 469 } 470 VM_OBJECT_UNLOCK(object); 471 472 smb_makescred(&scred, td, cred); 473 474 bp = getpbuf(&smbfs_pbuf_freecnt); 475 476 kva = (vm_offset_t) bp->b_data; 477 pmap_qenter(kva, pages, npages); 478 cnt.v_vnodein++; 479 cnt.v_vnodepgsin += npages; 480 481 iov.iov_base = (caddr_t) kva; 482 iov.iov_len = count; 483 uio.uio_iov = &iov; 484 uio.uio_iovcnt = 1; 485 uio.uio_offset = IDX_TO_OFF(pages[0]->pindex); 486 uio.uio_resid = count; 487 uio.uio_segflg = UIO_SYSSPACE; 488 uio.uio_rw = UIO_READ; 489 uio.uio_td = td; 490 491 error = smb_read(smp->sm_share, np->n_fid, &uio, &scred); 492 pmap_qremove(kva, npages); 493 494 relpbuf(bp, &smbfs_pbuf_freecnt); 495 496 VM_OBJECT_LOCK(object); 497 if (error && (uio.uio_resid == count)) { 498 printf("smbfs_getpages: error %d\n",error); 499 vm_page_lock_queues(); 500 for (i = 0; i < npages; i++) { 501 if (reqpage != i) 502 vm_page_free(pages[i]); 503 } 504 vm_page_unlock_queues(); 505 VM_OBJECT_UNLOCK(object); 506 return VM_PAGER_ERROR; 507 } 508 509 size = count - uio.uio_resid; 510 511 vm_page_lock_queues(); 512 for (i = 0, toff = 0; i < npages; i++, toff = nextoff) { 513 vm_page_t m; 514 nextoff = toff + PAGE_SIZE; 515 m = pages[i]; 516 517 if (nextoff <= size) { 518 /* 519 * Read operation filled an entire page 520 */ 521 m->valid = VM_PAGE_BITS_ALL; 522 vm_page_undirty(m); 523 } else if (size > toff) { 524 /* 525 * Read operation filled a partial page. 526 */ 527 m->valid = 0; 528 vm_page_set_validclean(m, 0, size - toff); 529 /* handled by vm_fault now */ 530 /* vm_page_zero_invalid(m, TRUE); */ 531 } else { 532 /* 533 * Read operation was short. If no error occured 534 * we may have hit a zero-fill section. We simply 535 * leave valid set to 0. 536 */ 537 ; 538 } 539 540 if (i != reqpage) { 541 /* 542 * Whether or not to leave the page activated is up in 543 * the air, but we should put the page on a page queue 544 * somewhere (it already is in the object). Result: 545 * It appears that emperical results show that 546 * deactivating pages is best. 547 */ 548 549 /* 550 * Just in case someone was asking for this page we 551 * now tell them that it is ok to use. 552 */ 553 if (!error) { 554 if (m->flags & PG_WANTED) 555 vm_page_activate(m); 556 else 557 vm_page_deactivate(m); 558 vm_page_wakeup(m); 559 } else { 560 vm_page_free(m); 561 } 562 } 563 } 564 vm_page_unlock_queues(); 565 VM_OBJECT_UNLOCK(object); 566 return 0; 567 #endif /* SMBFS_RWGENERIC */ 568 } 569 570 /* 571 * Vnode op for VM putpages. 572 * possible bug: all IO done in sync mode 573 * Note that vop_close always invalidate pages before close, so it's 574 * not necessary to open vnode. 575 */ 576 int 577 smbfs_putpages(ap) 578 struct vop_putpages_args /* { 579 struct vnode *a_vp; 580 vm_page_t *a_m; 581 int a_count; 582 int a_sync; 583 int *a_rtvals; 584 vm_ooffset_t a_offset; 585 } */ *ap; 586 { 587 int error; 588 struct vnode *vp = ap->a_vp; 589 struct thread *td; 590 struct ucred *cred; 591 592 #ifdef SMBFS_RWGENERIC 593 td = curthread; /* XXX */ 594 cred = td->td_ucred; /* XXX */ 595 VOP_OPEN(vp, FWRITE, cred, td, -1); 596 error = vop_stdputpages(ap); 597 VOP_CLOSE(vp, FWRITE, cred, td); 598 return error; 599 #else 600 struct uio uio; 601 struct iovec iov; 602 vm_offset_t kva; 603 struct buf *bp; 604 int i, npages, count; 605 int *rtvals; 606 struct smbmount *smp; 607 struct smbnode *np; 608 struct smb_cred scred; 609 vm_page_t *pages; 610 611 td = curthread; /* XXX */ 612 cred = td->td_ucred; /* XXX */ 613 /* VOP_OPEN(vp, FWRITE, cred, td, -1);*/ 614 np = VTOSMB(vp); 615 smp = VFSTOSMBFS(vp->v_mount); 616 pages = ap->a_m; 617 count = ap->a_count; 618 rtvals = ap->a_rtvals; 619 npages = btoc(count); 620 621 for (i = 0; i < npages; i++) { 622 rtvals[i] = VM_PAGER_AGAIN; 623 } 624 625 bp = getpbuf(&smbfs_pbuf_freecnt); 626 627 kva = (vm_offset_t) bp->b_data; 628 pmap_qenter(kva, pages, npages); 629 cnt.v_vnodeout++; 630 cnt.v_vnodepgsout += count; 631 632 iov.iov_base = (caddr_t) kva; 633 iov.iov_len = count; 634 uio.uio_iov = &iov; 635 uio.uio_iovcnt = 1; 636 uio.uio_offset = IDX_TO_OFF(pages[0]->pindex); 637 uio.uio_resid = count; 638 uio.uio_segflg = UIO_SYSSPACE; 639 uio.uio_rw = UIO_WRITE; 640 uio.uio_td = td; 641 SMBVDEBUG("ofs=%d,resid=%d\n",(int)uio.uio_offset, uio.uio_resid); 642 643 smb_makescred(&scred, td, cred); 644 error = smb_write(smp->sm_share, np->n_fid, &uio, &scred); 645 /* VOP_CLOSE(vp, FWRITE, cred, td);*/ 646 SMBVDEBUG("paged write done: %d\n", error); 647 648 pmap_qremove(kva, npages); 649 650 relpbuf(bp, &smbfs_pbuf_freecnt); 651 652 if (!error) { 653 int nwritten = round_page(count - uio.uio_resid) / PAGE_SIZE; 654 vm_page_lock_queues(); 655 for (i = 0; i < nwritten; i++) { 656 rtvals[i] = VM_PAGER_OK; 657 vm_page_undirty(pages[i]); 658 } 659 vm_page_unlock_queues(); 660 } 661 return rtvals[0]; 662 #endif /* SMBFS_RWGENERIC */ 663 } 664 665 /* 666 * Flush and invalidate all dirty buffers. If another process is already 667 * doing the flush, just wait for completion. 668 */ 669 int 670 smbfs_vinvalbuf(struct vnode *vp, struct thread *td) 671 { 672 struct smbnode *np = VTOSMB(vp); 673 int error = 0; 674 675 if (vp->v_iflag & VI_DOOMED) 676 return 0; 677 678 while (np->n_flag & NFLUSHINPROG) { 679 np->n_flag |= NFLUSHWANT; 680 error = tsleep(&np->n_flag, PRIBIO + 2, "smfsvinv", 2 * hz); 681 error = smb_td_intr(td); 682 if (error == EINTR) 683 return EINTR; 684 } 685 np->n_flag |= NFLUSHINPROG; 686 687 if (vp->v_bufobj.bo_object != NULL) { 688 VM_OBJECT_LOCK(vp->v_bufobj.bo_object); 689 vm_object_page_clean(vp->v_bufobj.bo_object, 0, 0, OBJPC_SYNC); 690 VM_OBJECT_UNLOCK(vp->v_bufobj.bo_object); 691 } 692 693 error = vinvalbuf(vp, V_SAVE, td, PCATCH, 0); 694 while (error) { 695 if (error == ERESTART || error == EINTR) { 696 np->n_flag &= ~NFLUSHINPROG; 697 if (np->n_flag & NFLUSHWANT) { 698 np->n_flag &= ~NFLUSHWANT; 699 wakeup(&np->n_flag); 700 } 701 return EINTR; 702 } 703 error = vinvalbuf(vp, V_SAVE, td, PCATCH, 0); 704 } 705 np->n_flag &= ~(NMODIFIED | NFLUSHINPROG); 706 if (np->n_flag & NFLUSHWANT) { 707 np->n_flag &= ~NFLUSHWANT; 708 wakeup(&np->n_flag); 709 } 710 return (error); 711 }
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