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 #if __FreeBSD_version < 400000 53 #include <vm/vm_prot.h> 54 #endif 55 #include <vm/vm_page.h> 56 #include <vm/vm_extern.h> 57 #include <vm/vm_object.h> 58 #include <vm/vm_pager.h> 59 #include <vm/vnode_pager.h> 60 /* 61 #include <sys/ioccom.h> 62 */ 63 #include <netsmb/smb.h> 64 #include <netsmb/smb_conn.h> 65 #include <netsmb/smb_subr.h> 66 67 #include <fs/smbfs/smbfs.h> 68 #include <fs/smbfs/smbfs_node.h> 69 #include <fs/smbfs/smbfs_subr.h> 70 71 /*#define SMBFS_RWGENERIC*/ 72 73 extern int smbfs_pbuf_freecnt; 74 75 static int smbfs_fastlookup = 1; 76 77 SYSCTL_DECL(_vfs_smbfs); 78 SYSCTL_INT(_vfs_smbfs, OID_AUTO, fastlookup, CTLFLAG_RW, &smbfs_fastlookup, 0, ""); 79 80 81 #define DE_SIZE (sizeof(struct dirent)) 82 83 static int 84 smbfs_readvdir(struct vnode *vp, struct uio *uio, struct ucred *cred) 85 { 86 struct dirent de; 87 struct componentname cn; 88 struct smb_cred scred; 89 struct smbfs_fctx *ctx; 90 struct vnode *newvp; 91 struct smbnode *np = VTOSMB(vp); 92 int error/*, *eofflag = ap->a_eofflag*/; 93 long offset, limit; 94 95 np = VTOSMB(vp); 96 SMBVDEBUG("dirname='%s'\n", np->n_name); 97 smb_makescred(&scred, uio->uio_procp, cred); 98 offset = uio->uio_offset / DE_SIZE; /* offset in the directory */ 99 limit = uio->uio_resid / DE_SIZE; 100 if (uio->uio_resid < DE_SIZE || uio->uio_offset < 0) 101 return EINVAL; 102 while (limit && offset < 2) { 103 limit--; 104 bzero((caddr_t)&de, DE_SIZE); 105 de.d_reclen = DE_SIZE; 106 de.d_fileno = (offset == 0) ? np->n_ino : 107 (np->n_parent ? np->n_parent->n_ino : 2); 108 if (de.d_fileno == 0) 109 de.d_fileno = 0x7ffffffd + offset; 110 de.d_namlen = offset + 1; 111 de.d_name[0] = '.'; 112 de.d_name[1] = '.'; 113 de.d_name[offset + 1] = '\0'; 114 de.d_type = DT_DIR; 115 error = uiomove((caddr_t)&de, DE_SIZE, uio); 116 if (error) 117 return error; 118 offset++; 119 uio->uio_offset += DE_SIZE; 120 } 121 if (limit == 0) 122 return 0; 123 if (offset != np->n_dirofs || np->n_dirseq == NULL) { 124 SMBVDEBUG("Reopening search %ld:%ld\n", offset, np->n_dirofs); 125 if (np->n_dirseq) { 126 smbfs_findclose(np->n_dirseq, &scred); 127 np->n_dirseq = NULL; 128 } 129 np->n_dirofs = 2; 130 error = smbfs_findopen(np, "*", 1, 131 SMB_FA_SYSTEM | SMB_FA_HIDDEN | SMB_FA_DIR, 132 &scred, &ctx); 133 if (error) { 134 SMBVDEBUG("can not open search, error = %d", error); 135 return error; 136 } 137 np->n_dirseq = ctx; 138 } else 139 ctx = np->n_dirseq; 140 while (np->n_dirofs < offset) { 141 error = smbfs_findnext(ctx, offset - np->n_dirofs++, &scred); 142 if (error) { 143 smbfs_findclose(np->n_dirseq, &scred); 144 np->n_dirseq = NULL; 145 return error == ENOENT ? 0 : error; 146 } 147 } 148 error = 0; 149 for (; limit; limit--, offset++) { 150 error = smbfs_findnext(ctx, limit, &scred); 151 if (error) 152 break; 153 np->n_dirofs++; 154 bzero((caddr_t)&de, DE_SIZE); 155 de.d_reclen = DE_SIZE; 156 de.d_fileno = ctx->f_attr.fa_ino; 157 de.d_type = (ctx->f_attr.fa_attr & SMB_FA_DIR) ? DT_DIR : DT_REG; 158 de.d_namlen = ctx->f_nmlen; 159 bcopy(ctx->f_name, de.d_name, de.d_namlen); 160 de.d_name[de.d_namlen] = '\0'; 161 if (smbfs_fastlookup) { 162 error = smbfs_nget(vp->v_mount, vp, ctx->f_name, 163 ctx->f_nmlen, &ctx->f_attr, &newvp); 164 if (!error) { 165 cn.cn_nameptr = de.d_name; 166 cn.cn_namelen = de.d_namlen; 167 cache_enter(vp, newvp, &cn); 168 vput(newvp); 169 } 170 } 171 error = uiomove((caddr_t)&de, DE_SIZE, uio); 172 if (error) 173 break; 174 } 175 if (error == ENOENT) 176 error = 0; 177 uio->uio_offset = offset * DE_SIZE; 178 return error; 179 } 180 181 int 182 smbfs_readvnode(struct vnode *vp, struct uio *uiop, struct ucred *cred) 183 { 184 struct smbmount *smp = VFSTOSMBFS(vp->v_mount); 185 struct smbnode *np = VTOSMB(vp); 186 struct proc *p; 187 struct vattr vattr; 188 struct smb_cred scred; 189 int error, lks; 190 191 if (vp->v_type != VREG && vp->v_type != VDIR) { 192 SMBFSERR("vn types other than VREG or VDIR are unsupported !\n"); 193 return EIO; 194 } 195 if (uiop->uio_resid == 0) 196 return 0; 197 if (uiop->uio_offset < 0) 198 return EINVAL; 199 /* if (uiop->uio_offset + uiop->uio_resid > smp->nm_maxfilesize) 200 return EFBIG;*/ 201 p = uiop->uio_procp; 202 if (vp->v_type == VDIR) { 203 lks = LK_EXCLUSIVE;/*lockstatus(&vp->v_lock, p);*/ 204 if (lks == LK_SHARED) 205 vn_lock(vp, LK_UPGRADE | LK_RETRY, p); 206 error = smbfs_readvdir(vp, uiop, cred); 207 if (lks == LK_SHARED) 208 vn_lock(vp, LK_DOWNGRADE | LK_RETRY, p); 209 return error; 210 } 211 212 /* biosize = SSTOCN(smp->sm_share)->sc_txmax;*/ 213 if (np->n_flag & NMODIFIED) { 214 smbfs_attr_cacheremove(vp); 215 error = VOP_GETATTR(vp, &vattr, cred, p); 216 if (error) 217 return error; 218 np->n_mtime.tv_sec = vattr.va_mtime.tv_sec; 219 } else { 220 error = VOP_GETATTR(vp, &vattr, cred, p); 221 if (error) 222 return error; 223 if (np->n_mtime.tv_sec != vattr.va_mtime.tv_sec) { 224 error = smbfs_vinvalbuf(vp, V_SAVE, cred, p, 1); 225 if (error) 226 return error; 227 np->n_mtime.tv_sec = vattr.va_mtime.tv_sec; 228 } 229 } 230 smb_makescred(&scred, p, cred); 231 return smb_read(smp->sm_share, np->n_fid, uiop, &scred); 232 } 233 234 int 235 smbfs_writevnode(struct vnode *vp, struct uio *uiop, 236 struct ucred *cred, int ioflag) 237 { 238 struct smbmount *smp = VTOSMBFS(vp); 239 struct smbnode *np = VTOSMB(vp); 240 struct smb_cred scred; 241 struct proc *p; 242 int error = 0; 243 244 if (vp->v_type != VREG) { 245 SMBERROR("vn types other than VREG unsupported !\n"); 246 return EIO; 247 } 248 SMBVDEBUG("ofs=%d,resid=%d\n",(int)uiop->uio_offset, uiop->uio_resid); 249 if (uiop->uio_offset < 0) 250 return EINVAL; 251 /* if (uiop->uio_offset + uiop->uio_resid > smp->nm_maxfilesize) 252 return (EFBIG);*/ 253 p = uiop->uio_procp; 254 if (ioflag & (IO_APPEND | IO_SYNC)) { 255 if (np->n_flag & NMODIFIED) { 256 smbfs_attr_cacheremove(vp); 257 error = smbfs_vinvalbuf(vp, V_SAVE, cred, p, 1); 258 if (error) 259 return error; 260 } 261 if (ioflag & IO_APPEND) { 262 #if notyet 263 /* 264 * File size can be changed by another client 265 */ 266 smbfs_attr_cacheremove(vp); 267 error = VOP_GETATTR(vp, &vattr, cred, p); 268 if (error) return (error); 269 #endif 270 uiop->uio_offset = np->n_size; 271 } 272 } 273 if (uiop->uio_resid == 0) 274 return 0; 275 if (p && uiop->uio_offset + uiop->uio_resid > p->p_rlimit[RLIMIT_FSIZE].rlim_cur) { 276 PROC_LOCK(p); 277 psignal(p, SIGXFSZ); 278 PROC_UNLOCK(p); 279 return EFBIG; 280 } 281 smb_makescred(&scred, p, cred); 282 error = smb_write(smp->sm_share, np->n_fid, uiop, &scred); 283 SMBVDEBUG("after: ofs=%d,resid=%d\n",(int)uiop->uio_offset, uiop->uio_resid); 284 if (!error) { 285 if (uiop->uio_offset > np->n_size) { 286 np->n_size = uiop->uio_offset; 287 vnode_pager_setsize(vp, np->n_size); 288 } 289 } 290 return error; 291 } 292 293 /* 294 * Do an I/O operation to/from a cache block. 295 */ 296 int 297 smbfs_doio(struct buf *bp, struct ucred *cr, struct proc *p) 298 { 299 struct vnode *vp = bp->b_vp; 300 struct smbmount *smp = VFSTOSMBFS(vp->v_mount); 301 struct smbnode *np = VTOSMB(vp); 302 struct uio uio, *uiop = &uio; 303 struct iovec io; 304 struct smb_cred scred; 305 int error = 0; 306 307 uiop->uio_iov = &io; 308 uiop->uio_iovcnt = 1; 309 uiop->uio_segflg = UIO_SYSSPACE; 310 uiop->uio_procp = p; 311 312 smb_makescred(&scred, p, cr); 313 314 if (bp->b_iocmd == BIO_READ) { 315 io.iov_len = uiop->uio_resid = bp->b_bcount; 316 io.iov_base = bp->b_data; 317 uiop->uio_rw = UIO_READ; 318 switch (vp->v_type) { 319 case VREG: 320 uiop->uio_offset = ((off_t)bp->b_blkno) * DEV_BSIZE; 321 error = smb_read(smp->sm_share, np->n_fid, uiop, &scred); 322 if (error) 323 break; 324 if (uiop->uio_resid) { 325 int left = uiop->uio_resid; 326 int nread = bp->b_bcount - left; 327 if (left > 0) 328 bzero((char *)bp->b_data + nread, left); 329 } 330 break; 331 default: 332 printf("smbfs_doio: type %x unexpected\n",vp->v_type); 333 break; 334 }; 335 if (error) { 336 bp->b_error = error; 337 bp->b_ioflags |= BIO_ERROR; 338 } 339 } else { /* write */ 340 if (((bp->b_blkno * DEV_BSIZE) + bp->b_dirtyend) > np->n_size) 341 bp->b_dirtyend = np->n_size - (bp->b_blkno * DEV_BSIZE); 342 343 if (bp->b_dirtyend > bp->b_dirtyoff) { 344 io.iov_len = uiop->uio_resid = bp->b_dirtyend - bp->b_dirtyoff; 345 uiop->uio_offset = ((off_t)bp->b_blkno) * DEV_BSIZE + bp->b_dirtyoff; 346 io.iov_base = (char *)bp->b_data + bp->b_dirtyoff; 347 uiop->uio_rw = UIO_WRITE; 348 bp->b_flags |= B_WRITEINPROG; 349 error = smb_write(smp->sm_share, np->n_fid, uiop, &scred); 350 bp->b_flags &= ~B_WRITEINPROG; 351 352 /* 353 * For an interrupted write, the buffer is still valid 354 * and the write hasn't been pushed to the server yet, 355 * so we can't set BIO_ERROR and report the interruption 356 * by setting B_EINTR. For the B_ASYNC case, B_EINTR 357 * is not relevant, so the rpc attempt is essentially 358 * a noop. For the case of a V3 write rpc not being 359 * committed to stable storage, the block is still 360 * dirty and requires either a commit rpc or another 361 * write rpc with iomode == NFSV3WRITE_FILESYNC before 362 * the block is reused. This is indicated by setting 363 * the B_DELWRI and B_NEEDCOMMIT flags. 364 */ 365 if (error == EINTR 366 || (!error && (bp->b_flags & B_NEEDCOMMIT))) { 367 int s; 368 369 s = splbio(); 370 bp->b_flags &= ~(B_INVAL|B_NOCACHE); 371 if ((bp->b_flags & B_ASYNC) == 0) 372 bp->b_flags |= B_EINTR; 373 if ((bp->b_flags & B_PAGING) == 0) { 374 bdirty(bp); 375 bp->b_flags &= ~B_DONE; 376 } 377 if ((bp->b_flags & B_ASYNC) == 0) 378 bp->b_flags |= B_EINTR; 379 splx(s); 380 } else { 381 if (error) { 382 bp->b_ioflags |= BIO_ERROR; 383 bp->b_error = error; 384 } 385 bp->b_dirtyoff = bp->b_dirtyend = 0; 386 } 387 } else { 388 bp->b_resid = 0; 389 bufdone(bp); 390 return 0; 391 } 392 } 393 bp->b_resid = uiop->uio_resid; 394 bufdone(bp); 395 return error; 396 } 397 398 /* 399 * Vnode op for VM getpages. 400 * Wish wish .... get rid from multiple IO routines 401 */ 402 int 403 smbfs_getpages(ap) 404 struct vop_getpages_args /* { 405 struct vnode *a_vp; 406 vm_page_t *a_m; 407 int a_count; 408 int a_reqpage; 409 vm_ooffset_t a_offset; 410 } */ *ap; 411 { 412 #ifdef SMBFS_RWGENERIC 413 return vop_stdgetpages(ap); 414 #else 415 int i, error, nextoff, size, toff, npages, count; 416 struct uio uio; 417 struct iovec iov; 418 vm_offset_t kva; 419 struct buf *bp; 420 struct vnode *vp; 421 struct proc *p; 422 struct ucred *cred; 423 struct smbmount *smp; 424 struct smbnode *np; 425 struct smb_cred scred; 426 vm_page_t *pages; 427 428 vp = ap->a_vp; 429 p = curproc; /* XXX */ 430 cred = curproc->p_ucred; /* XXX */ 431 np = VTOSMB(vp); 432 smp = VFSTOSMBFS(vp->v_mount); 433 pages = ap->a_m; 434 count = ap->a_count; 435 436 if (vp->v_object == NULL) { 437 printf("smbfs_getpages: called with non-merged cache vnode??\n"); 438 return VM_PAGER_ERROR; 439 } 440 smb_makescred(&scred, p, cred); 441 442 #if __FreeBSD_version >= 400000 443 bp = getpbuf(&smbfs_pbuf_freecnt); 444 #else 445 bp = getpbuf(); 446 #endif 447 npages = btoc(count); 448 kva = (vm_offset_t) bp->b_data; 449 pmap_qenter(kva, pages, npages); 450 cnt.v_vnodein++; 451 cnt.v_vnodepgsin += count; 452 453 iov.iov_base = (caddr_t) kva; 454 iov.iov_len = count; 455 uio.uio_iov = &iov; 456 uio.uio_iovcnt = 1; 457 uio.uio_offset = IDX_TO_OFF(pages[0]->pindex); 458 uio.uio_resid = count; 459 uio.uio_segflg = UIO_SYSSPACE; 460 uio.uio_rw = UIO_READ; 461 uio.uio_procp = p; 462 463 error = smb_read(smp->sm_share, np->n_fid, &uio, &scred); 464 pmap_qremove(kva, npages); 465 466 #if __FreeBSD_version >= 400000 467 relpbuf(bp, &smbfs_pbuf_freecnt); 468 #else 469 relpbuf(bp); 470 #endif 471 472 if (error && (uio.uio_resid == count)) { 473 printf("smbfs_getpages: error %d\n",error); 474 for (i = 0; i < npages; i++) { 475 if (ap->a_reqpage != i) 476 vm_page_free(pages[i]); 477 } 478 return VM_PAGER_ERROR; 479 } 480 481 size = count - uio.uio_resid; 482 483 for (i = 0, toff = 0; i < npages; i++, toff = nextoff) { 484 vm_page_t m; 485 nextoff = toff + PAGE_SIZE; 486 m = pages[i]; 487 488 m->flags &= ~PG_ZERO; 489 490 if (nextoff <= size) { 491 m->valid = VM_PAGE_BITS_ALL; 492 vm_page_undirty(m); 493 } else { 494 int nvalid = ((size + DEV_BSIZE - 1) - toff) & ~(DEV_BSIZE - 1); 495 vm_page_set_validclean(m, 0, nvalid); 496 } 497 498 if (i != ap->a_reqpage) { 499 /* 500 * Whether or not to leave the page activated is up in 501 * the air, but we should put the page on a page queue 502 * somewhere (it already is in the object). Result: 503 * It appears that emperical results show that 504 * deactivating pages is best. 505 */ 506 507 /* 508 * Just in case someone was asking for this page we 509 * now tell them that it is ok to use. 510 */ 511 if (!error) { 512 if (m->flags & PG_WANTED) 513 vm_page_activate(m); 514 else 515 vm_page_deactivate(m); 516 vm_page_wakeup(m); 517 } else { 518 vm_page_free(m); 519 } 520 } 521 } 522 return 0; 523 #endif /* SMBFS_RWGENERIC */ 524 } 525 526 /* 527 * Vnode op for VM putpages. 528 * possible bug: all IO done in sync mode 529 * Note that vop_close always invalidate pages before close, so it's 530 * not necessary to open vnode. 531 */ 532 int 533 smbfs_putpages(ap) 534 struct vop_putpages_args /* { 535 struct vnode *a_vp; 536 vm_page_t *a_m; 537 int a_count; 538 int a_sync; 539 int *a_rtvals; 540 vm_ooffset_t a_offset; 541 } */ *ap; 542 { 543 int error; 544 struct vnode *vp = ap->a_vp; 545 struct proc *p; 546 struct ucred *cred; 547 548 #ifdef SMBFS_RWGENERIC 549 p = curproc; /* XXX */ 550 cred = p->p_ucred; /* XXX */ 551 VOP_OPEN(vp, FWRITE, cred, p); 552 error = vop_stdputpages(ap); 553 VOP_CLOSE(vp, FWRITE, cred, p); 554 return error; 555 #else 556 struct uio uio; 557 struct iovec iov; 558 vm_offset_t kva; 559 struct buf *bp; 560 int i, npages, count; 561 int *rtvals; 562 struct smbmount *smp; 563 struct smbnode *np; 564 struct smb_cred scred; 565 vm_page_t *pages; 566 567 p = curproc; /* XXX */ 568 cred = p->p_ucred; /* XXX */ 569 /* VOP_OPEN(vp, FWRITE, cred, p);*/ 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 #if __FreeBSD_version >= 400000 582 bp = getpbuf(&smbfs_pbuf_freecnt); 583 #else 584 bp = getpbuf(); 585 #endif 586 kva = (vm_offset_t) bp->b_data; 587 pmap_qenter(kva, pages, npages); 588 cnt.v_vnodeout++; 589 cnt.v_vnodepgsout += count; 590 591 iov.iov_base = (caddr_t) kva; 592 iov.iov_len = count; 593 uio.uio_iov = &iov; 594 uio.uio_iovcnt = 1; 595 uio.uio_offset = IDX_TO_OFF(pages[0]->pindex); 596 uio.uio_resid = count; 597 uio.uio_segflg = UIO_SYSSPACE; 598 uio.uio_rw = UIO_WRITE; 599 uio.uio_procp = p; 600 SMBVDEBUG("ofs=%d,resid=%d\n",(int)uio.uio_offset, uio.uio_resid); 601 602 smb_makescred(&scred, p, cred); 603 error = smb_write(smp->sm_share, np->n_fid, &uio, &scred); 604 /* VOP_CLOSE(vp, FWRITE, cred, p);*/ 605 SMBVDEBUG("paged write done: %d\n", error); 606 607 pmap_qremove(kva, npages); 608 #if __FreeBSD_version >= 400000 609 relpbuf(bp, &smbfs_pbuf_freecnt); 610 #else 611 relpbuf(bp); 612 #endif 613 614 if (!error) { 615 int nwritten = round_page(count - uio.uio_resid) / PAGE_SIZE; 616 for (i = 0; i < nwritten; i++) { 617 rtvals[i] = VM_PAGER_OK; 618 vm_page_undirty(pages[i]); 619 } 620 } 621 return rtvals[0]; 622 #endif /* SMBFS_RWGENERIC */ 623 } 624 625 /* 626 * Flush and invalidate all dirty buffers. If another process is already 627 * doing the flush, just wait for completion. 628 */ 629 int 630 smbfs_vinvalbuf(vp, flags, cred, p, intrflg) 631 struct vnode *vp; 632 int flags; 633 struct ucred *cred; 634 struct proc *p; 635 int intrflg; 636 { 637 struct smbnode *np = VTOSMB(vp); 638 int error = 0, slpflag, slptimeo; 639 640 if (vp->v_flag & VXLOCK) 641 return 0; 642 if (intrflg) { 643 slpflag = PCATCH; 644 slptimeo = 2 * hz; 645 } else { 646 slpflag = 0; 647 slptimeo = 0; 648 } 649 while (np->n_flag & NFLUSHINPROG) { 650 np->n_flag |= NFLUSHWANT; 651 error = tsleep((caddr_t)&np->n_flag, PRIBIO + 2, "smfsvinv", slptimeo); 652 error = smb_proc_intr(p); 653 if (error == EINTR && intrflg) 654 return EINTR; 655 } 656 np->n_flag |= NFLUSHINPROG; 657 error = vinvalbuf(vp, flags, cred, p, slpflag, 0); 658 while (error) { 659 if (intrflg && (error == ERESTART || error == EINTR)) { 660 np->n_flag &= ~NFLUSHINPROG; 661 if (np->n_flag & NFLUSHWANT) { 662 np->n_flag &= ~NFLUSHWANT; 663 wakeup((caddr_t)&np->n_flag); 664 } 665 return EINTR; 666 } 667 error = vinvalbuf(vp, flags, cred, p, slpflag, 0); 668 } 669 np->n_flag &= ~(NMODIFIED | NFLUSHINPROG); 670 if (np->n_flag & NFLUSHWANT) { 671 np->n_flag &= ~NFLUSHWANT; 672 wakeup((caddr_t)&np->n_flag); 673 } 674 return (error); 675 } 676