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 1.7 2003/08/07 21:54:36 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 extern struct linker_set sysctl_vfs_smbfs; 75 76 SYSCTL_DECL(_vfs_smbfs); 77 SYSCTL_INT(_vfs_smbfs, OID_AUTO, fastlookup, CTLFLAG_RW, &smbfs_fastlookup, 0, ""); 78 79 80 #define DE_SIZE (sizeof(struct dirent)) 81 82 static int 83 smbfs_readvdir(struct vnode *vp, struct uio *uio, struct ucred *cred) 84 { 85 struct dirent de; 86 struct componentname cn; 87 struct smb_cred scred; 88 struct smbfs_fctx *ctx; 89 struct vnode *newvp; 90 struct smbnode *np = VTOSMB(vp); 91 int error/*, *eofflag = ap->a_eofflag*/; 92 long offset, limit; 93 94 np = VTOSMB(vp); 95 SMBVDEBUG("dirname='%s'\n", np->n_name); 96 smb_makescred(&scred, uio->uio_td, cred); 97 offset = uio->uio_offset / DE_SIZE; /* offset in the directory */ 98 limit = uio->uio_resid / DE_SIZE; 99 if (uio->uio_resid < DE_SIZE || uio->uio_offset < 0) 100 return EINVAL; 101 while (limit && offset < 2) { 102 limit--; 103 bzero((caddr_t)&de, DE_SIZE); 104 de.d_reclen = DE_SIZE; 105 de.d_fileno = (offset == 0) ? np->n_ino : 106 (np->n_parent ? VTOSMB(np->n_parent)->n_ino : 2); 107 if (de.d_fileno == 0) 108 de.d_fileno = 0x7ffffffd + offset; 109 de.d_namlen = offset + 1; 110 de.d_name[0] = '.'; 111 de.d_name[1] = '.'; 112 de.d_name[offset + 1] = '\0'; 113 de.d_type = DT_DIR; 114 error = uiomove((caddr_t)&de, DE_SIZE, uio); 115 if (error) 116 return error; 117 offset++; 118 uio->uio_offset += DE_SIZE; 119 } 120 if (limit == 0) 121 return 0; 122 if (offset != np->n_dirofs || np->n_dirseq == NULL) { 123 SMBVDEBUG("Reopening search %ld:%ld\n", offset, np->n_dirofs); 124 if (np->n_dirseq) { 125 smbfs_findclose(np->n_dirseq, &scred); 126 np->n_dirseq = NULL; 127 } 128 np->n_dirofs = 2; 129 error = smbfs_findopen(np, "*", 1, 130 SMB_FA_SYSTEM | SMB_FA_HIDDEN | SMB_FA_DIR, 131 &scred, &ctx); 132 if (error) { 133 SMBVDEBUG("can not open search, error = %d", error); 134 return error; 135 } 136 np->n_dirseq = ctx; 137 } else 138 ctx = np->n_dirseq; 139 while (np->n_dirofs < offset) { 140 error = smbfs_findnext(ctx, offset - np->n_dirofs++, &scred); 141 if (error) { 142 smbfs_findclose(np->n_dirseq, &scred); 143 np->n_dirseq = NULL; 144 return error == ENOENT ? 0 : error; 145 } 146 } 147 error = 0; 148 for (; limit; limit--, offset++) { 149 error = smbfs_findnext(ctx, limit, &scred); 150 if (error) 151 break; 152 np->n_dirofs++; 153 bzero((caddr_t)&de, DE_SIZE); 154 de.d_reclen = DE_SIZE; 155 de.d_fileno = ctx->f_attr.fa_ino; 156 de.d_type = (ctx->f_attr.fa_attr & SMB_FA_DIR) ? DT_DIR : DT_REG; 157 de.d_namlen = ctx->f_nmlen; 158 bcopy(ctx->f_name, de.d_name, de.d_namlen); 159 de.d_name[de.d_namlen] = '\0'; 160 if (smbfs_fastlookup) { 161 error = smbfs_nget(vp->v_mount, vp, ctx->f_name, 162 ctx->f_nmlen, &ctx->f_attr, &newvp); 163 if (!error) { 164 cn.cn_nameptr = de.d_name; 165 cn.cn_namelen = de.d_namlen; 166 cache_enter(vp, newvp, &cn); 167 vput(newvp); 168 } 169 } 170 error = uiomove((caddr_t)&de, DE_SIZE, uio); 171 if (error) 172 break; 173 } 174 if (error == ENOENT) 175 error = 0; 176 uio->uio_offset = offset * DE_SIZE; 177 return error; 178 } 179 180 int 181 smbfs_readvnode(struct vnode *vp, struct uio *uiop, struct ucred *cred) 182 { 183 struct thread *td; 184 struct smbmount *smp = VFSTOSMBFS(vp->v_mount); 185 struct smbnode *np = VTOSMB(vp); 186 struct vattr vattr; 187 struct smb_cred scred; 188 int error, lks; 189 190 /* 191 * Protect against method which is not supported for now 192 */ 193 if (uiop->uio_segflg == UIO_NOCOPY) 194 return EOPNOTSUPP; 195 196 if (vp->v_type != VREG && vp->v_type != VDIR) { 197 SMBFSERR("vn types other than VREG or VDIR are unsupported !\n"); 198 return EIO; 199 } 200 if (uiop->uio_resid == 0) 201 return 0; 202 if (uiop->uio_offset < 0) 203 return EINVAL; 204 /* if (uiop->uio_offset + uiop->uio_resid > smp->nm_maxfilesize) 205 return EFBIG;*/ 206 td = uiop->uio_td; 207 if (vp->v_type == VDIR) { 208 lks = LK_EXCLUSIVE;/*lockstatus(&vp->v_lock, td);*/ 209 if (lks == LK_SHARED) 210 vn_lock(vp, LK_UPGRADE | LK_RETRY, td); 211 error = smbfs_readvdir(vp, uiop, cred); 212 if (lks == LK_SHARED) 213 vn_lock(vp, LK_DOWNGRADE | LK_RETRY, td); 214 return error; 215 } 216 217 /* biosize = SSTOCN(smp->sm_share)->sc_txmax;*/ 218 if (np->n_flag & NMODIFIED) { 219 smbfs_attr_cacheremove(vp); 220 error = VOP_GETATTR(vp, &vattr, td); 221 if (error) 222 return error; 223 np->n_mtime.tv_sec = vattr.va_mtime.tv_sec; 224 } else { 225 error = VOP_GETATTR(vp, &vattr, td); 226 if (error) 227 return error; 228 if (np->n_mtime.tv_sec != vattr.va_mtime.tv_sec) { 229 error = smbfs_vinvalbuf(vp, V_SAVE, td, 1); 230 if (error) 231 return error; 232 np->n_mtime.tv_sec = vattr.va_mtime.tv_sec; 233 } 234 } 235 smb_makescred(&scred, td, cred); 236 return smb_read(smp->sm_share, np->n_fid, uiop, &scred); 237 } 238 239 int 240 smbfs_writevnode(struct vnode *vp, struct uio *uiop, 241 struct ucred *cred, int ioflag) 242 { 243 struct thread *td; 244 struct smbmount *smp = VTOSMBFS(vp); 245 struct smbnode *np = VTOSMB(vp); 246 struct smb_cred scred; 247 int error = 0; 248 249 if (vp->v_type != VREG) { 250 SMBERROR("vn types other than VREG unsupported !\n"); 251 return EIO; 252 } 253 SMBVDEBUG("ofs=%d,resid=%d\n",(int)uiop->uio_offset, uiop->uio_resid); 254 if (uiop->uio_offset < 0) 255 return EINVAL; 256 /* if (uiop->uio_offset + uiop->uio_resid > smp->nm_maxfilesize) 257 return (EFBIG);*/ 258 td = uiop->uio_td; 259 if (ioflag & (IO_APPEND | IO_SYNC)) { 260 if (np->n_flag & NMODIFIED) { 261 smbfs_attr_cacheremove(vp); 262 error = smbfs_vinvalbuf(vp, V_SAVE, td, 1); 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, 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 (td->td_proc && 281 uiop->uio_offset + uiop->uio_resid > 282 td->td_proc->p_rlimit[RLIMIT_FSIZE].rlim_cur) { 283 psignal(td->td_proc, SIGXFSZ); 284 return EFBIG; 285 } 286 smb_makescred(&scred, td, cred); 287 error = smb_write(smp->sm_share, np->n_fid, uiop, &scred); 288 SMBVDEBUG("after: ofs=%d,resid=%d\n",(int)uiop->uio_offset, uiop->uio_resid); 289 if (!error) { 290 if (uiop->uio_offset > np->n_size) { 291 np->n_size = uiop->uio_offset; 292 vnode_pager_setsize(vp, np->n_size); 293 } 294 } 295 return error; 296 } 297 298 /* 299 * Do an I/O operation to/from a cache block. 300 */ 301 int 302 smbfs_doio(struct buf *bp, struct ucred *cr, struct thread *td) 303 { 304 struct vnode *vp = bp->b_vp; 305 struct smbmount *smp = VFSTOSMBFS(vp->v_mount); 306 struct smbnode *np = VTOSMB(vp); 307 struct uio uio, *uiop = &uio; 308 struct iovec io; 309 struct smb_cred scred; 310 int error = 0; 311 312 uiop->uio_iov = &io; 313 uiop->uio_iovcnt = 1; 314 uiop->uio_segflg = UIO_SYSSPACE; 315 uiop->uio_td = td; 316 317 smb_makescred(&scred, td, cr); 318 319 if (bp->b_flags & B_READ) { 320 io.iov_len = uiop->uio_resid = bp->b_bcount; 321 io.iov_base = bp->b_data; 322 uiop->uio_rw = UIO_READ; 323 switch (vp->v_type) { 324 case VREG: 325 uiop->uio_offset = ((off_t)bp->b_blkno) * DEV_BSIZE; 326 error = smb_read(smp->sm_share, np->n_fid, uiop, &scred); 327 if (error) 328 break; 329 if (uiop->uio_resid) { 330 int left = uiop->uio_resid; 331 int nread = bp->b_bcount - left; 332 if (left > 0) 333 bzero((char *)bp->b_data + nread, left); 334 } 335 break; 336 default: 337 printf("smbfs_doio: type %x unexpected\n",vp->v_type); 338 break; 339 }; 340 if (error) { 341 bp->b_error = error; 342 bp->b_flags |= B_ERROR; 343 } 344 } else { /* write */ 345 if (((bp->b_blkno * DEV_BSIZE) + bp->b_dirtyend) > np->n_size) 346 bp->b_dirtyend = np->n_size - (bp->b_blkno * DEV_BSIZE); 347 348 if (bp->b_dirtyend > bp->b_dirtyoff) { 349 io.iov_len = uiop->uio_resid = bp->b_dirtyend - bp->b_dirtyoff; 350 uiop->uio_offset = ((off_t)bp->b_blkno) * DEV_BSIZE + bp->b_dirtyoff; 351 io.iov_base = (char *)bp->b_data + bp->b_dirtyoff; 352 uiop->uio_rw = UIO_WRITE; 353 bp->b_flags |= B_WRITEINPROG; 354 error = smb_write(smp->sm_share, np->n_fid, uiop, &scred); 355 bp->b_flags &= ~B_WRITEINPROG; 356 357 /* 358 * For an interrupted write, the buffer is still valid 359 * and the write hasn't been pushed to the server yet, 360 * so we can't set BIO_ERROR and report the interruption 361 * by setting B_EINTR. For the B_ASYNC case, B_EINTR 362 * is not relevant, so the rpc attempt is essentially 363 * a noop. For the case of a V3 write rpc not being 364 * committed to stable storage, the block is still 365 * dirty and requires either a commit rpc or another 366 * write rpc with iomode == NFSV3WRITE_FILESYNC before 367 * the block is reused. This is indicated by setting 368 * the B_DELWRI and B_NEEDCOMMIT flags. 369 */ 370 if (error == EINTR 371 || (!error && (bp->b_flags & B_NEEDCOMMIT))) { 372 int s; 373 374 s = splbio(); 375 bp->b_flags &= ~(B_INVAL|B_NOCACHE); 376 if ((bp->b_flags & B_ASYNC) == 0) 377 bp->b_flags |= B_EINTR; 378 if ((bp->b_flags & B_PAGING) == 0) { 379 bdirty(bp); 380 bp->b_flags &= ~B_DONE; 381 } 382 if ((bp->b_flags & B_ASYNC) == 0) 383 bp->b_flags |= B_EINTR; 384 splx(s); 385 } else { 386 if (error) { 387 bp->b_flags |= B_ERROR; 388 bp->b_error = error; 389 } 390 bp->b_dirtyoff = bp->b_dirtyend = 0; 391 } 392 } else { 393 bp->b_resid = 0; 394 biodone(bp); 395 return 0; 396 } 397 } 398 bp->b_resid = uiop->uio_resid; 399 biodone(bp); 400 return error; 401 } 402 403 /* 404 * Vnode op for VM getpages. 405 * Wish wish .... get rid from multiple IO routines 406 */ 407 int 408 smbfs_getpages(ap) 409 struct vop_getpages_args /* { 410 struct vnode *a_vp; 411 vm_page_t *a_m; 412 int a_count; 413 int a_reqpage; 414 vm_ooffset_t a_offset; 415 } */ *ap; 416 { 417 #ifdef SMBFS_RWGENERIC 418 return vnode_pager_generic_getpages(ap->a_vp, ap->a_m, ap->a_count, 419 ap->a_reqpage); 420 #else 421 int i, error, nextoff, size, toff, npages, count; 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 = curthread; /* XXX */ 428 struct ucred *cred; 429 struct smbmount *smp; 430 struct smbnode *np; 431 struct smb_cred scred; 432 vm_page_t *pages; 433 434 KKASSERT(td->td_proc); 435 436 vp = ap->a_vp; 437 cred = td->td_proc->p_ucred; 438 np = VTOSMB(vp); 439 smp = VFSTOSMBFS(vp->v_mount); 440 pages = ap->a_m; 441 count = ap->a_count; 442 443 if (vp->v_object == NULL) { 444 printf("smbfs_getpages: called with non-merged cache vnode??\n"); 445 return VM_PAGER_ERROR; 446 } 447 smb_makescred(&scred, td, cred); 448 449 bp = getpbuf(&smbfs_pbuf_freecnt); 450 npages = btoc(count); 451 kva = (vm_offset_t) bp->b_data; 452 pmap_qenter(kva, pages, npages); 453 454 iov.iov_base = (caddr_t) kva; 455 iov.iov_len = count; 456 uio.uio_iov = &iov; 457 uio.uio_iovcnt = 1; 458 uio.uio_offset = IDX_TO_OFF(pages[0]->pindex); 459 uio.uio_resid = count; 460 uio.uio_segflg = UIO_SYSSPACE; 461 uio.uio_rw = UIO_READ; 462 uio.uio_td = td; 463 464 error = smb_read(smp->sm_share, np->n_fid, &uio, &scred); 465 pmap_qremove(kva, npages); 466 467 relpbuf(bp, &smbfs_pbuf_freecnt); 468 469 if (error && (uio.uio_resid == count)) { 470 printf("smbfs_getpages: error %d\n",error); 471 for (i = 0; i < npages; i++) { 472 if (ap->a_reqpage != i) 473 vnode_pager_freepage(pages[i]); 474 } 475 return VM_PAGER_ERROR; 476 } 477 478 size = count - uio.uio_resid; 479 480 for (i = 0, toff = 0; i < npages; i++, toff = nextoff) { 481 vm_page_t m; 482 nextoff = toff + PAGE_SIZE; 483 m = pages[i]; 484 485 m->flags &= ~PG_ZERO; 486 487 if (nextoff <= size) { 488 m->valid = VM_PAGE_BITS_ALL; 489 m->dirty = 0; 490 } else { 491 int nvalid = ((size + DEV_BSIZE - 1) - toff) & ~(DEV_BSIZE - 1); 492 vm_page_set_validclean(m, 0, nvalid); 493 } 494 495 if (i != ap->a_reqpage) { 496 /* 497 * Whether or not to leave the page activated is up in 498 * the air, but we should put the page on a page queue 499 * somewhere (it already is in the object). Result: 500 * It appears that emperical results show that 501 * deactivating pages is best. 502 */ 503 504 /* 505 * Just in case someone was asking for this page we 506 * now tell them that it is ok to use. 507 */ 508 if (!error) { 509 if (m->flags & PG_WANTED) 510 vm_page_activate(m); 511 else 512 vm_page_deactivate(m); 513 vm_page_wakeup(m); 514 } else { 515 vnode_pager_freepage(m); 516 } 517 } 518 } 519 return 0; 520 #endif /* SMBFS_RWGENERIC */ 521 } 522 523 /* 524 * Vnode op for VM putpages. 525 * possible bug: all IO done in sync mode 526 * Note that vop_close always invalidate pages before close, so it's 527 * not necessary to open vnode. 528 */ 529 int 530 smbfs_putpages(ap) 531 struct vop_putpages_args /* { 532 struct vnode *a_vp; 533 vm_page_t *a_m; 534 int a_count; 535 int a_sync; 536 int *a_rtvals; 537 vm_ooffset_t a_offset; 538 } */ *ap; 539 { 540 int error; 541 struct vnode *vp = ap->a_vp; 542 struct thread *td = curthread; /* XXX */ 543 struct ucred *cred; 544 545 #ifdef SMBFS_RWGENERIC 546 KKASSERT(td->td_proc); 547 cred = td->td_proc->p_ucred; 548 VOP_OPEN(vp, FWRITE, cred, td); 549 error = vnode_pager_generic_putpages(ap->a_vp, ap->a_m, ap->a_count, 550 ap->a_sync, ap->a_rtvals); 551 VOP_CLOSE(vp, FWRITE, cred, td); 552 return error; 553 #else 554 struct uio uio; 555 struct iovec iov; 556 vm_offset_t kva; 557 struct buf *bp; 558 int i, npages, count; 559 int *rtvals; 560 struct smbmount *smp; 561 struct smbnode *np; 562 struct smb_cred scred; 563 vm_page_t *pages; 564 565 KKASSERT(td->td_proc); 566 cred = td->td_proc->p_ucred; 567 /* VOP_OPEN(vp, FWRITE, cred, td);*/ 568 np = VTOSMB(vp); 569 smp = VFSTOSMBFS(vp->v_mount); 570 pages = ap->a_m; 571 count = ap->a_count; 572 rtvals = ap->a_rtvals; 573 npages = btoc(count); 574 575 for (i = 0; i < npages; i++) { 576 rtvals[i] = VM_PAGER_AGAIN; 577 } 578 579 bp = getpbuf(&smbfs_pbuf_freecnt); 580 kva = (vm_offset_t) bp->b_data; 581 pmap_qenter(kva, pages, npages); 582 583 iov.iov_base = (caddr_t) kva; 584 iov.iov_len = count; 585 uio.uio_iov = &iov; 586 uio.uio_iovcnt = 1; 587 uio.uio_offset = IDX_TO_OFF(pages[0]->pindex); 588 uio.uio_resid = count; 589 uio.uio_segflg = UIO_SYSSPACE; 590 uio.uio_rw = UIO_WRITE; 591 uio.uio_td = td; 592 SMBVDEBUG("ofs=%d,resid=%d\n",(int)uio.uio_offset, uio.uio_resid); 593 594 smb_makescred(&scred, td, cred); 595 error = smb_write(smp->sm_share, np->n_fid, &uio, &scred); 596 /* VOP_CLOSE(vp, FWRITE, cred, td);*/ 597 SMBVDEBUG("paged write done: %d\n", error); 598 599 pmap_qremove(kva, npages); 600 relpbuf(bp, &smbfs_pbuf_freecnt); 601 602 if (!error) { 603 int nwritten = round_page(count - uio.uio_resid) / PAGE_SIZE; 604 for (i = 0; i < nwritten; i++) { 605 rtvals[i] = VM_PAGER_OK; 606 pages[i]->dirty = 0; 607 } 608 } 609 return rtvals[0]; 610 #endif /* SMBFS_RWGENERIC */ 611 } 612 613 /* 614 * Flush and invalidate all dirty buffers. If another process is already 615 * doing the flush, just wait for completion. 616 */ 617 int 618 smbfs_vinvalbuf(vp, flags, td, intrflg) 619 struct vnode *vp; 620 int flags; 621 struct thread *td; 622 int intrflg; 623 { 624 struct smbnode *np = VTOSMB(vp); 625 int error = 0, slpflag, slptimeo; 626 627 if (vp->v_flag & VXLOCK) 628 return 0; 629 if (intrflg) { 630 slpflag = PCATCH; 631 slptimeo = 2 * hz; 632 } else { 633 slpflag = 0; 634 slptimeo = 0; 635 } 636 while (np->n_flag & NFLUSHINPROG) { 637 np->n_flag |= NFLUSHWANT; 638 error = tsleep((caddr_t)&np->n_flag, 0, "smfsvinv", slptimeo); 639 error = smb_proc_intr(td); 640 if (error == EINTR && intrflg) 641 return EINTR; 642 } 643 np->n_flag |= NFLUSHINPROG; 644 error = vinvalbuf(vp, flags, td, slpflag, 0); 645 while (error) { 646 if (intrflg && (error == ERESTART || error == EINTR)) { 647 np->n_flag &= ~NFLUSHINPROG; 648 if (np->n_flag & NFLUSHWANT) { 649 np->n_flag &= ~NFLUSHWANT; 650 wakeup((caddr_t)&np->n_flag); 651 } 652 return EINTR; 653 } 654 error = vinvalbuf(vp, flags, td, slpflag, 0); 655 } 656 np->n_flag &= ~(NMODIFIED | NFLUSHINPROG); 657 if (np->n_flag & NFLUSHWANT) { 658 np->n_flag &= ~NFLUSHWANT; 659 wakeup((caddr_t)&np->n_flag); 660 } 661 return (error); 662 } 663