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 1.2 2003/06/17 04:28:33 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 <netsmb/smb.h> 59 #include <netsmb/smb_conn.h> 60 #include <netsmb/smb_subr.h> 61 62 #include <fs/smbfs/smbfs.h> 63 #include <fs/smbfs/smbfs_node.h> 64 #include <fs/smbfs/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_procp, 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 smbmount *smp = VFSTOSMBFS(vp->v_mount); 184 struct smbnode *np = VTOSMB(vp); 185 struct proc *p; 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 p = uiop->uio_procp; 207 if (vp->v_type == VDIR) { 208 lks = LK_EXCLUSIVE;/*lockstatus(&vp->v_lock, p);*/ 209 if (lks == LK_SHARED) 210 vn_lock(vp, LK_UPGRADE | LK_RETRY, p); 211 error = smbfs_readvdir(vp, uiop, cred); 212 if (lks == LK_SHARED) 213 vn_lock(vp, LK_DOWNGRADE | LK_RETRY, p); 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, cred, p); 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, cred, p); 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, cred, p, 1); 230 if (error) 231 return error; 232 np->n_mtime.tv_sec = vattr.va_mtime.tv_sec; 233 } 234 } 235 smb_makescred(&scred, p, 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 smbmount *smp = VTOSMBFS(vp); 244 struct smbnode *np = VTOSMB(vp); 245 struct smb_cred scred; 246 struct proc *p; 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 p = uiop->uio_procp; 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, cred, p, 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, cred, p); 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 && uiop->uio_offset + uiop->uio_resid > p->p_rlimit[RLIMIT_FSIZE].rlim_cur) { 281 psignal(p, SIGXFSZ); 282 return EFBIG; 283 } 284 smb_makescred(&scred, p, 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 proc *p) 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_procp = p; 314 315 smb_makescred(&scred, p, 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 proc *p; 426 struct ucred *cred; 427 struct smbmount *smp; 428 struct smbnode *np; 429 struct smb_cred scred; 430 vm_page_t *pages; 431 432 vp = ap->a_vp; 433 p = curproc; /* XXX */ 434 cred = curproc->p_ucred; /* XXX */ 435 np = VTOSMB(vp); 436 smp = VFSTOSMBFS(vp->v_mount); 437 pages = ap->a_m; 438 count = ap->a_count; 439 440 if (vp->v_object == NULL) { 441 printf("smbfs_getpages: called with non-merged cache vnode??\n"); 442 return VM_PAGER_ERROR; 443 } 444 smb_makescred(&scred, p, cred); 445 446 bp = getpbuf(&smbfs_pbuf_freecnt); 447 npages = btoc(count); 448 kva = (vm_offset_t) bp->b_data; 449 pmap_qenter(kva, pages, npages); 450 451 iov.iov_base = (caddr_t) kva; 452 iov.iov_len = count; 453 uio.uio_iov = &iov; 454 uio.uio_iovcnt = 1; 455 uio.uio_offset = IDX_TO_OFF(pages[0]->pindex); 456 uio.uio_resid = count; 457 uio.uio_segflg = UIO_SYSSPACE; 458 uio.uio_rw = UIO_READ; 459 uio.uio_procp = p; 460 461 error = smb_read(smp->sm_share, np->n_fid, &uio, &scred); 462 pmap_qremove(kva, npages); 463 464 relpbuf(bp, &smbfs_pbuf_freecnt); 465 466 if (error && (uio.uio_resid == count)) { 467 printf("smbfs_getpages: error %d\n",error); 468 for (i = 0; i < npages; i++) { 469 if (ap->a_reqpage != i) 470 vnode_pager_freepage(pages[i]); 471 } 472 return VM_PAGER_ERROR; 473 } 474 475 size = count - uio.uio_resid; 476 477 for (i = 0, toff = 0; i < npages; i++, toff = nextoff) { 478 vm_page_t m; 479 nextoff = toff + PAGE_SIZE; 480 m = pages[i]; 481 482 m->flags &= ~PG_ZERO; 483 484 if (nextoff <= size) { 485 m->valid = VM_PAGE_BITS_ALL; 486 m->dirty = 0; 487 } else { 488 int nvalid = ((size + DEV_BSIZE - 1) - toff) & ~(DEV_BSIZE - 1); 489 vm_page_set_validclean(m, 0, nvalid); 490 } 491 492 if (i != ap->a_reqpage) { 493 /* 494 * Whether or not to leave the page activated is up in 495 * the air, but we should put the page on a page queue 496 * somewhere (it already is in the object). Result: 497 * It appears that emperical results show that 498 * deactivating pages is best. 499 */ 500 501 /* 502 * Just in case someone was asking for this page we 503 * now tell them that it is ok to use. 504 */ 505 if (!error) { 506 if (m->flags & PG_WANTED) 507 vm_page_activate(m); 508 else 509 vm_page_deactivate(m); 510 vm_page_wakeup(m); 511 } else { 512 vnode_pager_freepage(m); 513 } 514 } 515 } 516 return 0; 517 #endif /* SMBFS_RWGENERIC */ 518 } 519 520 /* 521 * Vnode op for VM putpages. 522 * possible bug: all IO done in sync mode 523 * Note that vop_close always invalidate pages before close, so it's 524 * not necessary to open vnode. 525 */ 526 int 527 smbfs_putpages(ap) 528 struct vop_putpages_args /* { 529 struct vnode *a_vp; 530 vm_page_t *a_m; 531 int a_count; 532 int a_sync; 533 int *a_rtvals; 534 vm_ooffset_t a_offset; 535 } */ *ap; 536 { 537 int error; 538 struct vnode *vp = ap->a_vp; 539 struct proc *p; 540 struct ucred *cred; 541 542 #ifdef SMBFS_RWGENERIC 543 p = curproc; /* XXX */ 544 cred = p->p_ucred; /* XXX */ 545 VOP_OPEN(vp, FWRITE, cred, p); 546 error = vnode_pager_generic_putpages(ap->a_vp, ap->a_m, ap->a_count, 547 ap->a_sync, ap->a_rtvals); 548 VOP_CLOSE(vp, FWRITE, cred, p); 549 return error; 550 #else 551 struct uio uio; 552 struct iovec iov; 553 vm_offset_t kva; 554 struct buf *bp; 555 int i, npages, count; 556 int *rtvals; 557 struct smbmount *smp; 558 struct smbnode *np; 559 struct smb_cred scred; 560 vm_page_t *pages; 561 562 p = curproc; /* XXX */ 563 cred = p->p_ucred; /* XXX */ 564 /* VOP_OPEN(vp, FWRITE, cred, p);*/ 565 np = VTOSMB(vp); 566 smp = VFSTOSMBFS(vp->v_mount); 567 pages = ap->a_m; 568 count = ap->a_count; 569 rtvals = ap->a_rtvals; 570 npages = btoc(count); 571 572 for (i = 0; i < npages; i++) { 573 rtvals[i] = VM_PAGER_AGAIN; 574 } 575 576 bp = getpbuf(&smbfs_pbuf_freecnt); 577 kva = (vm_offset_t) bp->b_data; 578 pmap_qenter(kva, pages, npages); 579 580 iov.iov_base = (caddr_t) kva; 581 iov.iov_len = count; 582 uio.uio_iov = &iov; 583 uio.uio_iovcnt = 1; 584 uio.uio_offset = IDX_TO_OFF(pages[0]->pindex); 585 uio.uio_resid = count; 586 uio.uio_segflg = UIO_SYSSPACE; 587 uio.uio_rw = UIO_WRITE; 588 uio.uio_procp = p; 589 SMBVDEBUG("ofs=%d,resid=%d\n",(int)uio.uio_offset, uio.uio_resid); 590 591 smb_makescred(&scred, p, cred); 592 error = smb_write(smp->sm_share, np->n_fid, &uio, &scred); 593 /* VOP_CLOSE(vp, FWRITE, cred, p);*/ 594 SMBVDEBUG("paged write done: %d\n", error); 595 596 pmap_qremove(kva, npages); 597 relpbuf(bp, &smbfs_pbuf_freecnt); 598 599 if (!error) { 600 int nwritten = round_page(count - uio.uio_resid) / PAGE_SIZE; 601 for (i = 0; i < nwritten; i++) { 602 rtvals[i] = VM_PAGER_OK; 603 pages[i]->dirty = 0; 604 } 605 } 606 return rtvals[0]; 607 #endif /* SMBFS_RWGENERIC */ 608 } 609 610 /* 611 * Flush and invalidate all dirty buffers. If another process is already 612 * doing the flush, just wait for completion. 613 */ 614 int 615 smbfs_vinvalbuf(vp, flags, cred, p, intrflg) 616 struct vnode *vp; 617 int flags; 618 struct ucred *cred; 619 struct proc *p; 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, PRIBIO + 2, "smfsvinv", slptimeo); 637 error = smb_proc_intr(p); 638 if (error == EINTR && intrflg) 639 return EINTR; 640 } 641 np->n_flag |= NFLUSHINPROG; 642 error = vinvalbuf(vp, flags, cred, p, 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, cred, p, 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