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 1.10 2004/03/01 06:33:22 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 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((caddr_t)&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, NCPNULL, newvp, &cn); 165 vput(newvp); 166 } 167 } 168 error = uiomove((caddr_t)&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 thread *td; 182 struct smbmount *smp = VFSTOSMBFS(vp->v_mount); 183 struct smbnode *np = VTOSMB(vp); 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_lock, td);*/ 207 if (lks == LK_SHARED) 208 vn_lock(vp, NULL, LK_UPGRADE | LK_RETRY, td); 209 error = smbfs_readvdir(vp, uiop, cred); 210 if (lks == LK_SHARED) 211 vn_lock(vp, NULL, 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, 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, td); 224 if (error) 225 return error; 226 if (np->n_mtime.tv_sec != vattr.va_mtime.tv_sec) { 227 error = smbfs_vinvalbuf(vp, V_SAVE, td, 1); 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 thread *td; 242 struct smbmount *smp = VTOSMBFS(vp); 243 struct smbnode *np = VTOSMB(vp); 244 struct smb_cred scred; 245 int error = 0; 246 247 if (vp->v_type != VREG) { 248 SMBERROR("vn types other than VREG unsupported !\n"); 249 return EIO; 250 } 251 SMBVDEBUG("ofs=%d,resid=%d\n",(int)uiop->uio_offset, uiop->uio_resid); 252 if (uiop->uio_offset < 0) 253 return EINVAL; 254 /* if (uiop->uio_offset + uiop->uio_resid > smp->nm_maxfilesize) 255 return (EFBIG);*/ 256 td = uiop->uio_td; 257 if (ioflag & (IO_APPEND | IO_SYNC)) { 258 if (np->n_flag & NMODIFIED) { 259 smbfs_attr_cacheremove(vp); 260 error = smbfs_vinvalbuf(vp, V_SAVE, td, 1); 261 if (error) 262 return error; 263 } 264 if (ioflag & IO_APPEND) { 265 #if notyet 266 /* 267 * File size can be changed by another client 268 */ 269 smbfs_attr_cacheremove(vp); 270 error = VOP_GETATTR(vp, &vattr, td); 271 if (error) return (error); 272 #endif 273 uiop->uio_offset = np->n_size; 274 } 275 } 276 if (uiop->uio_resid == 0) 277 return 0; 278 if (td->td_proc && 279 uiop->uio_offset + uiop->uio_resid > 280 td->td_proc->p_rlimit[RLIMIT_FSIZE].rlim_cur) { 281 psignal(td->td_proc, SIGXFSZ); 282 return EFBIG; 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 buf *bp, struct ucred *cr, struct thread *td) 301 { 302 struct vnode *vp = bp->b_vp; 303 struct smbmount *smp = VFSTOSMBFS(vp->v_mount); 304 struct smbnode *np = VTOSMB(vp); 305 struct uio uio, *uiop = &uio; 306 struct iovec io; 307 struct smb_cred scred; 308 int error = 0; 309 310 uiop->uio_iov = &io; 311 uiop->uio_iovcnt = 1; 312 uiop->uio_segflg = UIO_SYSSPACE; 313 uiop->uio_td = td; 314 315 smb_makescred(&scred, td, cr); 316 317 if (bp->b_flags & B_READ) { 318 io.iov_len = uiop->uio_resid = bp->b_bcount; 319 io.iov_base = bp->b_data; 320 uiop->uio_rw = UIO_READ; 321 switch (vp->v_type) { 322 case VREG: 323 uiop->uio_offset = ((off_t)bp->b_blkno) * DEV_BSIZE; 324 error = smb_read(smp->sm_share, np->n_fid, uiop, &scred); 325 if (error) 326 break; 327 if (uiop->uio_resid) { 328 int left = uiop->uio_resid; 329 int nread = bp->b_bcount - left; 330 if (left > 0) 331 bzero((char *)bp->b_data + nread, left); 332 } 333 break; 334 default: 335 printf("smbfs_doio: type %x unexpected\n",vp->v_type); 336 break; 337 }; 338 if (error) { 339 bp->b_error = error; 340 bp->b_flags |= B_ERROR; 341 } 342 } else { /* write */ 343 if (((bp->b_blkno * DEV_BSIZE) + bp->b_dirtyend) > np->n_size) 344 bp->b_dirtyend = np->n_size - (bp->b_blkno * DEV_BSIZE); 345 346 if (bp->b_dirtyend > bp->b_dirtyoff) { 347 io.iov_len = uiop->uio_resid = bp->b_dirtyend - bp->b_dirtyoff; 348 uiop->uio_offset = ((off_t)bp->b_blkno) * DEV_BSIZE + bp->b_dirtyoff; 349 io.iov_base = (char *)bp->b_data + bp->b_dirtyoff; 350 uiop->uio_rw = UIO_WRITE; 351 bp->b_flags |= B_WRITEINPROG; 352 error = smb_write(smp->sm_share, np->n_fid, uiop, &scred); 353 bp->b_flags &= ~B_WRITEINPROG; 354 355 /* 356 * For an interrupted write, the buffer is still valid 357 * and the write hasn't been pushed to the server yet, 358 * so we can't set BIO_ERROR and report the interruption 359 * by setting B_EINTR. For the B_ASYNC case, B_EINTR 360 * is not relevant, so the rpc attempt is essentially 361 * a noop. For the case of a V3 write rpc not being 362 * committed to stable storage, the block is still 363 * dirty and requires either a commit rpc or another 364 * write rpc with iomode == NFSV3WRITE_FILESYNC before 365 * the block is reused. This is indicated by setting 366 * the B_DELWRI and B_NEEDCOMMIT flags. 367 */ 368 if (error == EINTR 369 || (!error && (bp->b_flags & B_NEEDCOMMIT))) { 370 int s; 371 372 s = splbio(); 373 bp->b_flags &= ~(B_INVAL|B_NOCACHE); 374 if ((bp->b_flags & B_ASYNC) == 0) 375 bp->b_flags |= B_EINTR; 376 if ((bp->b_flags & B_PAGING) == 0) { 377 bdirty(bp); 378 bp->b_flags &= ~B_DONE; 379 } 380 if ((bp->b_flags & B_ASYNC) == 0) 381 bp->b_flags |= B_EINTR; 382 splx(s); 383 } else { 384 if (error) { 385 bp->b_flags |= B_ERROR; 386 bp->b_error = error; 387 } 388 bp->b_dirtyoff = bp->b_dirtyend = 0; 389 } 390 } else { 391 bp->b_resid = 0; 392 biodone(bp); 393 return 0; 394 } 395 } 396 bp->b_resid = uiop->uio_resid; 397 biodone(bp); 398 return error; 399 } 400 401 /* 402 * Vnode op for VM getpages. 403 * Wish wish .... get rid from multiple IO routines 404 */ 405 int 406 smbfs_getpages(ap) 407 struct vop_getpages_args /* { 408 struct vnode *a_vp; 409 vm_page_t *a_m; 410 int a_count; 411 int a_reqpage; 412 vm_ooffset_t a_offset; 413 } */ *ap; 414 { 415 #ifdef SMBFS_RWGENERIC 416 return vnode_pager_generic_getpages(ap->a_vp, ap->a_m, ap->a_count, 417 ap->a_reqpage); 418 #else 419 int i, error, nextoff, size, toff, npages, count; 420 struct uio uio; 421 struct iovec iov; 422 vm_offset_t kva; 423 struct buf *bp; 424 struct vnode *vp; 425 struct thread *td = curthread; /* XXX */ 426 struct ucred *cred; 427 struct smbmount *smp; 428 struct smbnode *np; 429 struct smb_cred scred; 430 vm_page_t *pages; 431 432 KKASSERT(td->td_proc); 433 434 vp = ap->a_vp; 435 cred = td->td_proc->p_ucred; 436 np = VTOSMB(vp); 437 smp = VFSTOSMBFS(vp->v_mount); 438 pages = ap->a_m; 439 count = ap->a_count; 440 441 if (vp->v_object == NULL) { 442 printf("smbfs_getpages: called with non-merged cache vnode??\n"); 443 return VM_PAGER_ERROR; 444 } 445 smb_makescred(&scred, td, cred); 446 447 bp = getpbuf(&smbfs_pbuf_freecnt); 448 npages = btoc(count); 449 kva = (vm_offset_t) bp->b_data; 450 pmap_qenter(kva, pages, npages); 451 452 iov.iov_base = (caddr_t) kva; 453 iov.iov_len = count; 454 uio.uio_iov = &iov; 455 uio.uio_iovcnt = 1; 456 uio.uio_offset = IDX_TO_OFF(pages[0]->pindex); 457 uio.uio_resid = count; 458 uio.uio_segflg = UIO_SYSSPACE; 459 uio.uio_rw = UIO_READ; 460 uio.uio_td = td; 461 462 error = smb_read(smp->sm_share, np->n_fid, &uio, &scred); 463 pmap_qremove(kva, npages); 464 465 relpbuf(bp, &smbfs_pbuf_freecnt); 466 467 if (error && (uio.uio_resid == count)) { 468 printf("smbfs_getpages: error %d\n",error); 469 for (i = 0; i < npages; i++) { 470 if (ap->a_reqpage != i) 471 vnode_pager_freepage(pages[i]); 472 } 473 return VM_PAGER_ERROR; 474 } 475 476 size = count - uio.uio_resid; 477 478 for (i = 0, toff = 0; i < npages; i++, toff = nextoff) { 479 vm_page_t m; 480 nextoff = toff + PAGE_SIZE; 481 m = pages[i]; 482 483 m->flags &= ~PG_ZERO; 484 485 if (nextoff <= size) { 486 m->valid = VM_PAGE_BITS_ALL; 487 m->dirty = 0; 488 } else { 489 int nvalid = ((size + DEV_BSIZE - 1) - toff) & ~(DEV_BSIZE - 1); 490 vm_page_set_validclean(m, 0, nvalid); 491 } 492 493 if (i != ap->a_reqpage) { 494 /* 495 * Whether or not to leave the page activated is up in 496 * the air, but we should put the page on a page queue 497 * somewhere (it already is in the object). Result: 498 * It appears that emperical results show that 499 * deactivating pages is best. 500 */ 501 502 /* 503 * Just in case someone was asking for this page we 504 * now tell them that it is ok to use. 505 */ 506 if (!error) { 507 if (m->flags & PG_WANTED) 508 vm_page_activate(m); 509 else 510 vm_page_deactivate(m); 511 vm_page_wakeup(m); 512 } else { 513 vnode_pager_freepage(m); 514 } 515 } 516 } 517 return 0; 518 #endif /* SMBFS_RWGENERIC */ 519 } 520 521 /* 522 * Vnode op for VM putpages. 523 * possible bug: all IO done in sync mode 524 * Note that vop_close always invalidate pages before close, so it's 525 * not necessary to open vnode. 526 */ 527 int 528 smbfs_putpages(ap) 529 struct vop_putpages_args /* { 530 struct vnode *a_vp; 531 vm_page_t *a_m; 532 int a_count; 533 int a_sync; 534 int *a_rtvals; 535 vm_ooffset_t a_offset; 536 } */ *ap; 537 { 538 int error; 539 struct vnode *vp = ap->a_vp; 540 struct thread *td = curthread; /* XXX */ 541 struct ucred *cred; 542 543 #ifdef SMBFS_RWGENERIC 544 KKASSERT(td->td_proc); 545 cred = td->td_proc->p_ucred; 546 VOP_OPEN(vp, FWRITE, cred, td); 547 error = vnode_pager_generic_putpages(ap->a_vp, ap->a_m, ap->a_count, 548 ap->a_sync, ap->a_rtvals); 549 VOP_CLOSE(vp, FWRITE, cred, td); 550 return error; 551 #else 552 struct uio uio; 553 struct iovec iov; 554 vm_offset_t kva; 555 struct buf *bp; 556 int i, npages, count; 557 int *rtvals; 558 struct smbmount *smp; 559 struct smbnode *np; 560 struct smb_cred scred; 561 vm_page_t *pages; 562 563 KKASSERT(td->td_proc); 564 cred = td->td_proc->p_ucred; 565 /* VOP_OPEN(vp, FWRITE, cred, td);*/ 566 np = VTOSMB(vp); 567 smp = VFSTOSMBFS(vp->v_mount); 568 pages = ap->a_m; 569 count = ap->a_count; 570 rtvals = ap->a_rtvals; 571 npages = btoc(count); 572 573 for (i = 0; i < npages; i++) { 574 rtvals[i] = VM_PAGER_AGAIN; 575 } 576 577 bp = getpbuf(&smbfs_pbuf_freecnt); 578 kva = (vm_offset_t) bp->b_data; 579 pmap_qenter(kva, pages, npages); 580 581 iov.iov_base = (caddr_t) kva; 582 iov.iov_len = count; 583 uio.uio_iov = &iov; 584 uio.uio_iovcnt = 1; 585 uio.uio_offset = IDX_TO_OFF(pages[0]->pindex); 586 uio.uio_resid = count; 587 uio.uio_segflg = UIO_SYSSPACE; 588 uio.uio_rw = UIO_WRITE; 589 uio.uio_td = td; 590 SMBVDEBUG("ofs=%d,resid=%d\n",(int)uio.uio_offset, uio.uio_resid); 591 592 smb_makescred(&scred, td, cred); 593 error = smb_write(smp->sm_share, np->n_fid, &uio, &scred); 594 /* VOP_CLOSE(vp, FWRITE, cred, td);*/ 595 SMBVDEBUG("paged write done: %d\n", error); 596 597 pmap_qremove(kva, npages); 598 relpbuf(bp, &smbfs_pbuf_freecnt); 599 600 if (!error) { 601 int nwritten = round_page(count - uio.uio_resid) / PAGE_SIZE; 602 for (i = 0; i < nwritten; i++) { 603 rtvals[i] = VM_PAGER_OK; 604 pages[i]->dirty = 0; 605 } 606 } 607 return rtvals[0]; 608 #endif /* SMBFS_RWGENERIC */ 609 } 610 611 /* 612 * Flush and invalidate all dirty buffers. If another process is already 613 * doing the flush, just wait for completion. 614 */ 615 int 616 smbfs_vinvalbuf(vp, flags, td, intrflg) 617 struct vnode *vp; 618 int flags; 619 struct thread *td; 620 int intrflg; 621 { 622 struct smbnode *np = VTOSMB(vp); 623 int error = 0, slpflag, slptimeo; 624 625 if (vp->v_flag & VXLOCK) 626 return 0; 627 if (intrflg) { 628 slpflag = PCATCH; 629 slptimeo = 2 * hz; 630 } else { 631 slpflag = 0; 632 slptimeo = 0; 633 } 634 while (np->n_flag & NFLUSHINPROG) { 635 np->n_flag |= NFLUSHWANT; 636 error = tsleep((caddr_t)&np->n_flag, 0, "smfsvinv", slptimeo); 637 error = smb_proc_intr(td); 638 if (error == EINTR && intrflg) 639 return EINTR; 640 } 641 np->n_flag |= NFLUSHINPROG; 642 error = vinvalbuf(vp, flags, td, slpflag, 0); 643 while (error) { 644 if (intrflg && (error == ERESTART || error == EINTR)) { 645 np->n_flag &= ~NFLUSHINPROG; 646 if (np->n_flag & NFLUSHWANT) { 647 np->n_flag &= ~NFLUSHWANT; 648 wakeup((caddr_t)&np->n_flag); 649 } 650 return EINTR; 651 } 652 error = vinvalbuf(vp, flags, td, slpflag, 0); 653 } 654 np->n_flag &= ~(NMODIFIED | NFLUSHINPROG); 655 if (np->n_flag & NFLUSHWANT) { 656 np->n_flag &= ~NFLUSHWANT; 657 wakeup((caddr_t)&np->n_flag); 658 } 659 return (error); 660 } 661