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: src/sys/fs/smbfs/smbfs_io.c,v 1.3.2.3 2003/01/17 08:20:26 tjr Exp $ 33 * $DragonFly: src/sys/vfs/smbfs/smbfs_io.c,v 1.15 2005/01/08 18:57:48 dillon Exp $ 34 * 35 */ 36 #include <sys/param.h> 37 #include <sys/systm.h> 38 #include <sys/resourcevar.h> /* defines plimit structure in proc struct */ 39 #include <sys/kernel.h> 40 #include <sys/proc.h> 41 #include <sys/fcntl.h> 42 #include <sys/mount.h> 43 #include <sys/namei.h> 44 #include <sys/vnode.h> 45 #include <sys/dirent.h> 46 #include <sys/signalvar.h> 47 #include <sys/sysctl.h> 48 49 #include <vm/vm.h> 50 #include <vm/vm_page.h> 51 #include <vm/vm_extern.h> 52 #include <vm/vm_object.h> 53 #include <vm/vm_pager.h> 54 #include <vm/vnode_pager.h> 55 /* 56 #include <sys/ioccom.h> 57 */ 58 #include <netproto/smb/smb.h> 59 #include <netproto/smb/smb_conn.h> 60 #include <netproto/smb/smb_subr.h> 61 62 #include "smbfs.h" 63 #include "smbfs_node.h" 64 #include "smbfs_subr.h" 65 66 #include <sys/buf.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 smb_cred scred; 85 struct smbfs_fctx *ctx; 86 struct vnode *newvp; 87 struct smbnode *np = VTOSMB(vp); 88 int error/*, *eofflag = ap->a_eofflag*/; 89 long offset, limit; 90 91 np = VTOSMB(vp); 92 SMBVDEBUG("dirname='%s'\n", np->n_name); 93 smb_makescred(&scred, uio->uio_td, cred); 94 offset = uio->uio_offset / DE_SIZE; /* offset in the directory */ 95 limit = uio->uio_resid / DE_SIZE; 96 if (uio->uio_resid < DE_SIZE || uio->uio_offset < 0) 97 return EINVAL; 98 while (limit && offset < 2) { 99 limit--; 100 bzero((caddr_t)&de, DE_SIZE); 101 de.d_reclen = DE_SIZE; 102 de.d_fileno = (offset == 0) ? np->n_ino : 103 (np->n_parent ? VTOSMB(np->n_parent)->n_ino : 2); 104 if (de.d_fileno == 0) 105 de.d_fileno = 0x7ffffffd + offset; 106 de.d_namlen = offset + 1; 107 de.d_name[0] = '.'; 108 de.d_name[1] = '.'; 109 de.d_name[offset + 1] = '\0'; 110 de.d_type = DT_DIR; 111 error = uiomove((caddr_t)&de, DE_SIZE, uio); 112 if (error) 113 return error; 114 offset++; 115 uio->uio_offset += DE_SIZE; 116 } 117 if (limit == 0) 118 return 0; 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 return error; 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 return error == ENOENT ? 0 : error; 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 vput(newvp); 162 } 163 error = uiomove((caddr_t)&de, DE_SIZE, uio); 164 if (error) 165 break; 166 } 167 if (error == ENOENT) 168 error = 0; 169 uio->uio_offset = offset * DE_SIZE; 170 return error; 171 } 172 173 int 174 smbfs_readvnode(struct vnode *vp, struct uio *uiop, struct ucred *cred) 175 { 176 struct thread *td; 177 struct smbmount *smp = VFSTOSMBFS(vp->v_mount); 178 struct smbnode *np = VTOSMB(vp); 179 struct vattr vattr; 180 struct smb_cred scred; 181 int error, lks; 182 183 /* 184 * Protect against method which is not supported for now 185 */ 186 if (uiop->uio_segflg == UIO_NOCOPY) 187 return EOPNOTSUPP; 188 189 if (vp->v_type != VREG && vp->v_type != VDIR) { 190 SMBFSERR("vn types other than VREG or VDIR are unsupported !\n"); 191 return EIO; 192 } 193 if (uiop->uio_resid == 0) 194 return 0; 195 if (uiop->uio_offset < 0) 196 return EINVAL; 197 /* if (uiop->uio_offset + uiop->uio_resid > smp->nm_maxfilesize) 198 return EFBIG;*/ 199 td = uiop->uio_td; 200 if (vp->v_type == VDIR) { 201 lks = LK_EXCLUSIVE;/*lockstatus(&vp->v_lock, td);*/ 202 if (lks == LK_SHARED) 203 vn_lock(vp, LK_UPGRADE | LK_RETRY, td); 204 error = smbfs_readvdir(vp, uiop, cred); 205 if (lks == LK_SHARED) 206 vn_lock(vp, LK_DOWNGRADE | LK_RETRY, td); 207 return error; 208 } 209 210 /* biosize = SSTOCN(smp->sm_share)->sc_txmax;*/ 211 if (np->n_flag & NMODIFIED) { 212 smbfs_attr_cacheremove(vp); 213 error = VOP_GETATTR(vp, &vattr, td); 214 if (error) 215 return error; 216 np->n_mtime.tv_sec = vattr.va_mtime.tv_sec; 217 } else { 218 error = VOP_GETATTR(vp, &vattr, td); 219 if (error) 220 return error; 221 if (np->n_mtime.tv_sec != vattr.va_mtime.tv_sec) { 222 error = smbfs_vinvalbuf(vp, V_SAVE, td, 1); 223 if (error) 224 return error; 225 np->n_mtime.tv_sec = vattr.va_mtime.tv_sec; 226 } 227 } 228 smb_makescred(&scred, td, cred); 229 return smb_read(smp->sm_share, np->n_fid, uiop, &scred); 230 } 231 232 int 233 smbfs_writevnode(struct vnode *vp, struct uio *uiop, 234 struct ucred *cred, int ioflag) 235 { 236 struct thread *td; 237 struct smbmount *smp = VTOSMBFS(vp); 238 struct smbnode *np = VTOSMB(vp); 239 struct smb_cred scred; 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 if (ioflag & (IO_APPEND | IO_SYNC)) { 253 if (np->n_flag & NMODIFIED) { 254 smbfs_attr_cacheremove(vp); 255 error = smbfs_vinvalbuf(vp, V_SAVE, td, 1); 256 if (error) 257 return error; 258 } 259 if (ioflag & IO_APPEND) { 260 #if notyet 261 /* 262 * File size can be changed by another client 263 */ 264 smbfs_attr_cacheremove(vp); 265 error = VOP_GETATTR(vp, &vattr, td); 266 if (error) return (error); 267 #endif 268 uiop->uio_offset = np->n_size; 269 } 270 } 271 if (uiop->uio_resid == 0) 272 return 0; 273 if (td->td_proc && 274 uiop->uio_offset + uiop->uio_resid > 275 td->td_proc->p_rlimit[RLIMIT_FSIZE].rlim_cur) { 276 psignal(td->td_proc, SIGXFSZ); 277 return EFBIG; 278 } 279 smb_makescred(&scred, td, cred); 280 error = smb_write(smp->sm_share, np->n_fid, uiop, &scred); 281 SMBVDEBUG("after: ofs=%d,resid=%d\n",(int)uiop->uio_offset, uiop->uio_resid); 282 if (!error) { 283 if (uiop->uio_offset > np->n_size) { 284 np->n_size = uiop->uio_offset; 285 vnode_pager_setsize(vp, np->n_size); 286 } 287 } 288 return error; 289 } 290 291 /* 292 * Do an I/O operation to/from a cache block. 293 */ 294 int 295 smbfs_doio(struct buf *bp, struct ucred *cr, struct thread *td) 296 { 297 struct vnode *vp = bp->b_vp; 298 struct smbmount *smp = VFSTOSMBFS(vp->v_mount); 299 struct smbnode *np = VTOSMB(vp); 300 struct uio uio, *uiop = &uio; 301 struct iovec io; 302 struct smb_cred scred; 303 int error = 0; 304 305 uiop->uio_iov = &io; 306 uiop->uio_iovcnt = 1; 307 uiop->uio_segflg = UIO_SYSSPACE; 308 uiop->uio_td = td; 309 310 smb_makescred(&scred, td, cr); 311 312 if (bp->b_flags & B_READ) { 313 io.iov_len = uiop->uio_resid = bp->b_bcount; 314 io.iov_base = bp->b_data; 315 uiop->uio_rw = UIO_READ; 316 switch (vp->v_type) { 317 case VREG: 318 uiop->uio_offset = ((off_t)bp->b_blkno) * DEV_BSIZE; 319 error = smb_read(smp->sm_share, np->n_fid, uiop, &scred); 320 if (error) 321 break; 322 if (uiop->uio_resid) { 323 int left = uiop->uio_resid; 324 int nread = bp->b_bcount - left; 325 if (left > 0) 326 bzero((char *)bp->b_data + nread, left); 327 } 328 break; 329 default: 330 printf("smbfs_doio: type %x unexpected\n",vp->v_type); 331 break; 332 }; 333 if (error) { 334 bp->b_error = error; 335 bp->b_flags |= B_ERROR; 336 } 337 } else { /* write */ 338 if (((bp->b_blkno * DEV_BSIZE) + bp->b_dirtyend) > np->n_size) 339 bp->b_dirtyend = np->n_size - (bp->b_blkno * DEV_BSIZE); 340 341 if (bp->b_dirtyend > bp->b_dirtyoff) { 342 io.iov_len = uiop->uio_resid = bp->b_dirtyend - bp->b_dirtyoff; 343 uiop->uio_offset = ((off_t)bp->b_blkno) * DEV_BSIZE + bp->b_dirtyoff; 344 io.iov_base = (char *)bp->b_data + bp->b_dirtyoff; 345 uiop->uio_rw = UIO_WRITE; 346 bp->b_flags |= B_WRITEINPROG; 347 error = smb_write(smp->sm_share, np->n_fid, uiop, &scred); 348 bp->b_flags &= ~B_WRITEINPROG; 349 350 /* 351 * For an interrupted write, the buffer is still valid 352 * and the write hasn't been pushed to the server yet, 353 * so we can't set BIO_ERROR and report the interruption 354 * by setting B_EINTR. For the B_ASYNC case, B_EINTR 355 * is not relevant, so the rpc attempt is essentially 356 * a noop. For the case of a V3 write rpc not being 357 * committed to stable storage, the block is still 358 * dirty and requires either a commit rpc or another 359 * write rpc with iomode == NFSV3WRITE_FILESYNC before 360 * the block is reused. This is indicated by setting 361 * the B_DELWRI and B_NEEDCOMMIT flags. 362 */ 363 if (error == EINTR 364 || (!error && (bp->b_flags & B_NEEDCOMMIT))) { 365 int s; 366 367 s = splbio(); 368 bp->b_flags &= ~(B_INVAL|B_NOCACHE); 369 if ((bp->b_flags & B_ASYNC) == 0) 370 bp->b_flags |= B_EINTR; 371 if ((bp->b_flags & B_PAGING) == 0) { 372 bdirty(bp); 373 bp->b_flags &= ~B_DONE; 374 } 375 if ((bp->b_flags & B_ASYNC) == 0) 376 bp->b_flags |= B_EINTR; 377 splx(s); 378 } else { 379 if (error) { 380 bp->b_flags |= B_ERROR; 381 bp->b_error = error; 382 } 383 bp->b_dirtyoff = bp->b_dirtyend = 0; 384 } 385 } else { 386 bp->b_resid = 0; 387 biodone(bp); 388 return 0; 389 } 390 } 391 bp->b_resid = uiop->uio_resid; 392 biodone(bp); 393 return error; 394 } 395 396 /* 397 * Vnode op for VM getpages. 398 * Wish wish .... get rid from multiple IO routines 399 * 400 * smbfs_getpages(struct vnode *a_vp, vm_page_t *a_m, int a_count, 401 * int a_reqpage, vm_ooffset_t a_offset) 402 */ 403 int 404 smbfs_getpages(struct vop_getpages_args *ap) 405 { 406 #ifdef SMBFS_RWGENERIC 407 return vnode_pager_generic_getpages(ap->a_vp, ap->a_m, ap->a_count, 408 ap->a_reqpage); 409 #else 410 int i, error, nextoff, size, toff, npages, count; 411 int doclose; 412 struct uio uio; 413 struct iovec iov; 414 vm_offset_t kva; 415 struct buf *bp; 416 struct vnode *vp; 417 struct thread *td = curthread; /* XXX */ 418 struct ucred *cred; 419 struct smbmount *smp; 420 struct smbnode *np; 421 struct smb_cred scred; 422 vm_page_t *pages; 423 424 KKASSERT(td->td_proc); 425 426 vp = ap->a_vp; 427 cred = td->td_proc->p_ucred; 428 np = VTOSMB(vp); 429 smp = VFSTOSMBFS(vp->v_mount); 430 pages = ap->a_m; 431 count = ap->a_count; 432 433 if (vp->v_object == NULL) { 434 printf("smbfs_getpages: called with non-merged cache vnode??\n"); 435 return VM_PAGER_ERROR; 436 } 437 smb_makescred(&scred, td, cred); 438 439 bp = getpbuf(&smbfs_pbuf_freecnt); 440 npages = btoc(count); 441 kva = (vm_offset_t) bp->b_data; 442 pmap_qenter(kva, pages, npages); 443 444 iov.iov_base = (caddr_t) kva; 445 iov.iov_len = count; 446 uio.uio_iov = &iov; 447 uio.uio_iovcnt = 1; 448 uio.uio_offset = IDX_TO_OFF(pages[0]->pindex); 449 uio.uio_resid = count; 450 uio.uio_segflg = UIO_SYSSPACE; 451 uio.uio_rw = UIO_READ; 452 uio.uio_td = td; 453 454 /* 455 * This is kinda nasty. Since smbfs is physically closing the 456 * fid on close(), we have to reopen it if necessary. There are 457 * other races here too, such as if another process opens the same 458 * file while we are blocked in read. XXX 459 */ 460 error = 0; 461 doclose = 0; 462 if (np->n_opencount == 0) { 463 error = smbfs_smb_open(np, SMB_AM_OPENREAD, &scred); 464 if (error == 0) 465 doclose = 1; 466 } 467 if (error == 0) 468 error = smb_read(smp->sm_share, np->n_fid, &uio, &scred); 469 if (doclose) 470 smbfs_smb_close(smp->sm_share, np->n_fid, NULL, &scred); 471 pmap_qremove(kva, npages); 472 473 relpbuf(bp, &smbfs_pbuf_freecnt); 474 475 if (error && (uio.uio_resid == count)) { 476 printf("smbfs_getpages: error %d\n",error); 477 for (i = 0; i < npages; i++) { 478 if (ap->a_reqpage != i) 479 vnode_pager_freepage(pages[i]); 480 } 481 return VM_PAGER_ERROR; 482 } 483 484 size = count - uio.uio_resid; 485 486 for (i = 0, toff = 0; i < npages; i++, toff = nextoff) { 487 vm_page_t m; 488 nextoff = toff + PAGE_SIZE; 489 m = pages[i]; 490 491 m->flags &= ~PG_ZERO; 492 493 if (nextoff <= size) { 494 m->valid = VM_PAGE_BITS_ALL; 495 m->dirty = 0; 496 } else { 497 int nvalid = ((size + DEV_BSIZE - 1) - toff) & ~(DEV_BSIZE - 1); 498 vm_page_set_validclean(m, 0, nvalid); 499 } 500 501 if (i != ap->a_reqpage) { 502 /* 503 * Whether or not to leave the page activated is up in 504 * the air, but we should put the page on a page queue 505 * somewhere (it already is in the object). Result: 506 * It appears that emperical results show that 507 * deactivating pages is best. 508 */ 509 510 /* 511 * Just in case someone was asking for this page we 512 * now tell them that it is ok to use. 513 */ 514 if (!error) { 515 if (m->flags & PG_WANTED) 516 vm_page_activate(m); 517 else 518 vm_page_deactivate(m); 519 vm_page_wakeup(m); 520 } else { 521 vnode_pager_freepage(m); 522 } 523 } 524 } 525 return 0; 526 #endif /* SMBFS_RWGENERIC */ 527 } 528 529 /* 530 * Vnode op for VM putpages. 531 * possible bug: all IO done in sync mode 532 * Note that vop_close always invalidate pages before close, so it's 533 * not necessary to open vnode. 534 * 535 * smbfs_putpages(struct vnode *a_vp, vm_page_t *a_m, int a_count, int a_sync, 536 * int *a_rtvals, vm_ooffset_t a_offset) 537 */ 538 int 539 smbfs_putpages(struct vop_putpages_args *ap) 540 { 541 int error; 542 struct vnode *vp = ap->a_vp; 543 struct thread *td = curthread; /* XXX */ 544 struct ucred *cred; 545 546 #ifdef SMBFS_RWGENERIC 547 KKASSERT(td->td_proc); 548 cred = td->td_proc->p_ucred; 549 VOP_OPEN(vp, FWRITE, cred, NULL, td); 550 error = vnode_pager_generic_putpages(ap->a_vp, ap->a_m, ap->a_count, 551 ap->a_sync, ap->a_rtvals); 552 VOP_CLOSE(vp, FWRITE, cred, td); 553 return error; 554 #else 555 struct uio uio; 556 struct iovec iov; 557 vm_offset_t kva; 558 struct buf *bp; 559 int i, npages, count; 560 int doclose; 561 int *rtvals; 562 struct smbmount *smp; 563 struct smbnode *np; 564 struct smb_cred scred; 565 vm_page_t *pages; 566 567 KKASSERT(td->td_proc); 568 cred = td->td_proc->p_ucred; 569 /* VOP_OPEN(vp, FWRITE, cred, td);*/ 570 np = VTOSMB(vp); 571 smp = VFSTOSMBFS(vp->v_mount); 572 pages = ap->a_m; 573 count = ap->a_count; 574 rtvals = ap->a_rtvals; 575 npages = btoc(count); 576 577 for (i = 0; i < npages; i++) { 578 rtvals[i] = VM_PAGER_AGAIN; 579 } 580 581 bp = getpbuf(&smbfs_pbuf_freecnt); 582 kva = (vm_offset_t) bp->b_data; 583 pmap_qenter(kva, pages, npages); 584 585 iov.iov_base = (caddr_t) kva; 586 iov.iov_len = count; 587 uio.uio_iov = &iov; 588 uio.uio_iovcnt = 1; 589 uio.uio_offset = IDX_TO_OFF(pages[0]->pindex); 590 uio.uio_resid = count; 591 uio.uio_segflg = UIO_SYSSPACE; 592 uio.uio_rw = UIO_WRITE; 593 uio.uio_td = td; 594 SMBVDEBUG("ofs=%d,resid=%d\n",(int)uio.uio_offset, uio.uio_resid); 595 596 smb_makescred(&scred, td, cred); 597 598 /* 599 * This is kinda nasty. Since smbfs is physically closing the 600 * fid on close(), we have to reopen it if necessary. There are 601 * other races here too, such as if another process opens the same 602 * file while we are blocked in read, or the file is open read-only 603 * XXX 604 */ 605 error = 0; 606 doclose = 0; 607 if (np->n_opencount == 0) { 608 error = smbfs_smb_open(np, SMB_AM_OPENRW, &scred); 609 if (error == 0) 610 doclose = 1; 611 } 612 if (error == 0) 613 error = smb_write(smp->sm_share, np->n_fid, &uio, &scred); 614 if (doclose) 615 smbfs_smb_close(smp->sm_share, np->n_fid, NULL, &scred); 616 /* VOP_CLOSE(vp, FWRITE, cred, td);*/ 617 SMBVDEBUG("paged write done: %d\n", error); 618 619 pmap_qremove(kva, npages); 620 relpbuf(bp, &smbfs_pbuf_freecnt); 621 622 if (!error) { 623 int nwritten = round_page(count - uio.uio_resid) / PAGE_SIZE; 624 for (i = 0; i < nwritten; i++) { 625 rtvals[i] = VM_PAGER_OK; 626 pages[i]->dirty = 0; 627 } 628 } 629 return rtvals[0]; 630 #endif /* SMBFS_RWGENERIC */ 631 } 632 633 /* 634 * Flush and invalidate all dirty buffers. If another process is already 635 * doing the flush, just wait for completion. 636 */ 637 int 638 smbfs_vinvalbuf(struct vnode *vp, int flags, struct thread *td, int intrflg) 639 { 640 struct smbnode *np = VTOSMB(vp); 641 int error = 0, slpflag, slptimeo; 642 643 if (vp->v_flag & VRECLAIMED) 644 return 0; 645 if (intrflg) { 646 slpflag = PCATCH; 647 slptimeo = 2 * hz; 648 } else { 649 slpflag = 0; 650 slptimeo = 0; 651 } 652 while (np->n_flag & NFLUSHINPROG) { 653 np->n_flag |= NFLUSHWANT; 654 error = tsleep((caddr_t)&np->n_flag, 0, "smfsvinv", slptimeo); 655 error = smb_proc_intr(td); 656 if (error == EINTR && intrflg) 657 return EINTR; 658 } 659 np->n_flag |= NFLUSHINPROG; 660 error = vinvalbuf(vp, flags, td, slpflag, 0); 661 while (error) { 662 if (intrflg && (error == ERESTART || error == EINTR)) { 663 np->n_flag &= ~NFLUSHINPROG; 664 if (np->n_flag & NFLUSHWANT) { 665 np->n_flag &= ~NFLUSHWANT; 666 wakeup((caddr_t)&np->n_flag); 667 } 668 return EINTR; 669 } 670 error = vinvalbuf(vp, flags, td, slpflag, 0); 671 } 672 np->n_flag &= ~(NMODIFIED | NFLUSHINPROG); 673 if (np->n_flag & NFLUSHWANT) { 674 np->n_flag &= ~NFLUSHWANT; 675 wakeup((caddr_t)&np->n_flag); 676 } 677 return (error); 678 } 679