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_td, 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 thread *td; 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 td = uiop->uio_td; 202 if (vp->v_type == VDIR) { 203 lks = LK_EXCLUSIVE;/*lockstatus(&vp->v_lock, td);*/ 204 if (lks == LK_SHARED) 205 vn_lock(vp, LK_UPGRADE | LK_RETRY, td); 206 error = smbfs_readvdir(vp, uiop, cred); 207 if (lks == LK_SHARED) 208 vn_lock(vp, LK_DOWNGRADE | LK_RETRY, td); 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, td); 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, td); 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, td, 1); 225 if (error) 226 return error; 227 np->n_mtime.tv_sec = vattr.va_mtime.tv_sec; 228 } 229 } 230 smb_makescred(&scred, td, 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 struct thread *td; 243 int error = 0; 244 245 if (vp->v_type != VREG) { 246 SMBERROR("vn types other than VREG unsupported !\n"); 247 return EIO; 248 } 249 SMBVDEBUG("ofs=%d,resid=%d\n",(int)uiop->uio_offset, uiop->uio_resid); 250 if (uiop->uio_offset < 0) 251 return EINVAL; 252 /* if (uiop->uio_offset + uiop->uio_resid > smp->nm_maxfilesize) 253 return (EFBIG);*/ 254 td = uiop->uio_td; 255 p = td->td_proc; 256 if (ioflag & (IO_APPEND | IO_SYNC)) { 257 if (np->n_flag & NMODIFIED) { 258 smbfs_attr_cacheremove(vp); 259 error = smbfs_vinvalbuf(vp, V_SAVE, cred, td, 1); 260 if (error) 261 return error; 262 } 263 if (ioflag & IO_APPEND) { 264 #if notyet 265 /* 266 * File size can be changed by another client 267 */ 268 smbfs_attr_cacheremove(vp); 269 error = VOP_GETATTR(vp, &vattr, cred, td); 270 if (error) return (error); 271 #endif 272 uiop->uio_offset = np->n_size; 273 } 274 } 275 if (uiop->uio_resid == 0) 276 return 0; 277 if (p && uiop->uio_offset + uiop->uio_resid > p->p_rlimit[RLIMIT_FSIZE].rlim_cur) { 278 PROC_LOCK(td->td_proc); 279 psignal(td->td_proc, SIGXFSZ); 280 PROC_UNLOCK(td->td_proc); 281 return EFBIG; 282 } 283 smb_makescred(&scred, td, cred); 284 error = smb_write(smp->sm_share, np->n_fid, uiop, &scred); 285 SMBVDEBUG("after: ofs=%d,resid=%d\n",(int)uiop->uio_offset, uiop->uio_resid); 286 if (!error) { 287 if (uiop->uio_offset > np->n_size) { 288 np->n_size = uiop->uio_offset; 289 vnode_pager_setsize(vp, np->n_size); 290 } 291 } 292 return error; 293 } 294 295 /* 296 * Do an I/O operation to/from a cache block. 297 */ 298 int 299 smbfs_doio(struct buf *bp, struct ucred *cr, struct thread *td) 300 { 301 struct vnode *vp = bp->b_vp; 302 struct smbmount *smp = VFSTOSMBFS(vp->v_mount); 303 struct smbnode *np = VTOSMB(vp); 304 struct uio uio, *uiop = &uio; 305 struct iovec io; 306 struct smb_cred scred; 307 int error = 0; 308 309 uiop->uio_iov = &io; 310 uiop->uio_iovcnt = 1; 311 uiop->uio_segflg = UIO_SYSSPACE; 312 uiop->uio_td = td; 313 314 smb_makescred(&scred, td, cr); 315 316 if (bp->b_iocmd == BIO_READ) { 317 io.iov_len = uiop->uio_resid = bp->b_bcount; 318 io.iov_base = bp->b_data; 319 uiop->uio_rw = UIO_READ; 320 switch (vp->v_type) { 321 case VREG: 322 uiop->uio_offset = ((off_t)bp->b_blkno) * DEV_BSIZE; 323 error = smb_read(smp->sm_share, np->n_fid, uiop, &scred); 324 if (error) 325 break; 326 if (uiop->uio_resid) { 327 int left = uiop->uio_resid; 328 int nread = bp->b_bcount - left; 329 if (left > 0) 330 bzero((char *)bp->b_data + nread, left); 331 } 332 break; 333 default: 334 printf("smbfs_doio: type %x unexpected\n",vp->v_type); 335 break; 336 }; 337 if (error) { 338 bp->b_error = error; 339 bp->b_ioflags |= BIO_ERROR; 340 } 341 } else { /* write */ 342 if (((bp->b_blkno * DEV_BSIZE) + bp->b_dirtyend) > np->n_size) 343 bp->b_dirtyend = np->n_size - (bp->b_blkno * DEV_BSIZE); 344 345 if (bp->b_dirtyend > bp->b_dirtyoff) { 346 io.iov_len = uiop->uio_resid = bp->b_dirtyend - bp->b_dirtyoff; 347 uiop->uio_offset = ((off_t)bp->b_blkno) * DEV_BSIZE + bp->b_dirtyoff; 348 io.iov_base = (char *)bp->b_data + bp->b_dirtyoff; 349 uiop->uio_rw = UIO_WRITE; 350 bp->b_flags |= B_WRITEINPROG; 351 error = smb_write(smp->sm_share, np->n_fid, uiop, &scred); 352 bp->b_flags &= ~B_WRITEINPROG; 353 354 /* 355 * For an interrupted write, the buffer is still valid 356 * and the write hasn't been pushed to the server yet, 357 * so we can't set BIO_ERROR and report the interruption 358 * by setting B_EINTR. For the B_ASYNC case, B_EINTR 359 * is not relevant, so the rpc attempt is essentially 360 * a noop. For the case of a V3 write rpc not being 361 * committed to stable storage, the block is still 362 * dirty and requires either a commit rpc or another 363 * write rpc with iomode == NFSV3WRITE_FILESYNC before 364 * the block is reused. This is indicated by setting 365 * the B_DELWRI and B_NEEDCOMMIT flags. 366 */ 367 if (error == EINTR 368 || (!error && (bp->b_flags & B_NEEDCOMMIT))) { 369 int s; 370 371 s = splbio(); 372 bp->b_flags &= ~(B_INVAL|B_NOCACHE); 373 if ((bp->b_flags & B_ASYNC) == 0) 374 bp->b_flags |= B_EINTR; 375 if ((bp->b_flags & B_PAGING) == 0) { 376 bdirty(bp); 377 bp->b_flags &= ~B_DONE; 378 } 379 if ((bp->b_flags & B_ASYNC) == 0) 380 bp->b_flags |= B_EINTR; 381 splx(s); 382 } else { 383 if (error) { 384 bp->b_ioflags |= BIO_ERROR; 385 bp->b_error = error; 386 } 387 bp->b_dirtyoff = bp->b_dirtyend = 0; 388 } 389 } else { 390 bp->b_resid = 0; 391 bufdone(bp); 392 return 0; 393 } 394 } 395 bp->b_resid = uiop->uio_resid; 396 bufdone(bp); 397 return error; 398 } 399 400 /* 401 * Vnode op for VM getpages. 402 * Wish wish .... get rid from multiple IO routines 403 */ 404 int 405 smbfs_getpages(ap) 406 struct vop_getpages_args /* { 407 struct vnode *a_vp; 408 vm_page_t *a_m; 409 int a_count; 410 int a_reqpage; 411 vm_ooffset_t a_offset; 412 } */ *ap; 413 { 414 #ifdef SMBFS_RWGENERIC 415 return vop_stdgetpages(ap); 416 #else 417 int i, error, nextoff, size, toff, npages, count; 418 struct uio uio; 419 struct iovec iov; 420 vm_offset_t kva; 421 struct buf *bp; 422 struct vnode *vp; 423 struct thread *td; 424 struct ucred *cred; 425 struct smbmount *smp; 426 struct smbnode *np; 427 struct smb_cred scred; 428 vm_page_t *pages; 429 430 vp = ap->a_vp; 431 td = curthread; /* XXX */ 432 cred = td->td_proc->p_ucred; /* XXX */ 433 np = VTOSMB(vp); 434 smp = VFSTOSMBFS(vp->v_mount); 435 pages = ap->a_m; 436 count = ap->a_count; 437 438 if (vp->v_object == NULL) { 439 printf("smbfs_getpages: called with non-merged cache vnode??\n"); 440 return VM_PAGER_ERROR; 441 } 442 smb_makescred(&scred, td, cred); 443 444 #if __FreeBSD_version >= 400000 445 bp = getpbuf(&smbfs_pbuf_freecnt); 446 #else 447 bp = getpbuf(); 448 #endif 449 npages = btoc(count); 450 kva = (vm_offset_t) bp->b_data; 451 pmap_qenter(kva, pages, npages); 452 cnt.v_vnodein++; 453 cnt.v_vnodepgsin += count; 454 455 iov.iov_base = (caddr_t) kva; 456 iov.iov_len = count; 457 uio.uio_iov = &iov; 458 uio.uio_iovcnt = 1; 459 uio.uio_offset = IDX_TO_OFF(pages[0]->pindex); 460 uio.uio_resid = count; 461 uio.uio_segflg = UIO_SYSSPACE; 462 uio.uio_rw = UIO_READ; 463 uio.uio_td = td; 464 465 error = smb_read(smp->sm_share, np->n_fid, &uio, &scred); 466 pmap_qremove(kva, npages); 467 468 #if __FreeBSD_version >= 400000 469 relpbuf(bp, &smbfs_pbuf_freecnt); 470 #else 471 relpbuf(bp); 472 #endif 473 474 if (error && (uio.uio_resid == count)) { 475 printf("smbfs_getpages: error %d\n",error); 476 for (i = 0; i < npages; i++) { 477 if (ap->a_reqpage != i) 478 vm_page_free(pages[i]); 479 } 480 return VM_PAGER_ERROR; 481 } 482 483 size = count - uio.uio_resid; 484 485 for (i = 0, toff = 0; i < npages; i++, toff = nextoff) { 486 vm_page_t m; 487 nextoff = toff + PAGE_SIZE; 488 m = pages[i]; 489 490 m->flags &= ~PG_ZERO; 491 492 if (nextoff <= size) { 493 m->valid = VM_PAGE_BITS_ALL; 494 vm_page_undirty(m); 495 } else { 496 int nvalid = ((size + DEV_BSIZE - 1) - toff) & ~(DEV_BSIZE - 1); 497 vm_page_set_validclean(m, 0, nvalid); 498 } 499 500 if (i != ap->a_reqpage) { 501 /* 502 * Whether or not to leave the page activated is up in 503 * the air, but we should put the page on a page queue 504 * somewhere (it already is in the object). Result: 505 * It appears that emperical results show that 506 * deactivating pages is best. 507 */ 508 509 /* 510 * Just in case someone was asking for this page we 511 * now tell them that it is ok to use. 512 */ 513 if (!error) { 514 if (m->flags & PG_WANTED) 515 vm_page_activate(m); 516 else 517 vm_page_deactivate(m); 518 vm_page_wakeup(m); 519 } else { 520 vm_page_free(m); 521 } 522 } 523 } 524 return 0; 525 #endif /* SMBFS_RWGENERIC */ 526 } 527 528 /* 529 * Vnode op for VM putpages. 530 * possible bug: all IO done in sync mode 531 * Note that vop_close always invalidate pages before close, so it's 532 * not necessary to open vnode. 533 */ 534 int 535 smbfs_putpages(ap) 536 struct vop_putpages_args /* { 537 struct vnode *a_vp; 538 vm_page_t *a_m; 539 int a_count; 540 int a_sync; 541 int *a_rtvals; 542 vm_ooffset_t a_offset; 543 } */ *ap; 544 { 545 int error; 546 struct vnode *vp = ap->a_vp; 547 struct thread *td; 548 struct ucred *cred; 549 550 #ifdef SMBFS_RWGENERIC 551 td = curthread; /* XXX */ 552 cred = td->td_proc->p_ucred; /* XXX */ 553 VOP_OPEN(vp, FWRITE, cred, td); 554 error = vop_stdputpages(ap); 555 VOP_CLOSE(vp, FWRITE, cred, td); 556 return error; 557 #else 558 struct uio uio; 559 struct iovec iov; 560 vm_offset_t kva; 561 struct buf *bp; 562 int i, npages, count; 563 int *rtvals; 564 struct smbmount *smp; 565 struct smbnode *np; 566 struct smb_cred scred; 567 vm_page_t *pages; 568 569 td = curthread; /* XXX */ 570 cred = td->td_proc->p_ucred; /* XXX */ 571 /* VOP_OPEN(vp, FWRITE, cred, td);*/ 572 np = VTOSMB(vp); 573 smp = VFSTOSMBFS(vp->v_mount); 574 pages = ap->a_m; 575 count = ap->a_count; 576 rtvals = ap->a_rtvals; 577 npages = btoc(count); 578 579 for (i = 0; i < npages; i++) { 580 rtvals[i] = VM_PAGER_AGAIN; 581 } 582 583 #if __FreeBSD_version >= 400000 584 bp = getpbuf(&smbfs_pbuf_freecnt); 585 #else 586 bp = getpbuf(); 587 #endif 588 kva = (vm_offset_t) bp->b_data; 589 pmap_qenter(kva, pages, npages); 590 cnt.v_vnodeout++; 591 cnt.v_vnodepgsout += count; 592 593 iov.iov_base = (caddr_t) kva; 594 iov.iov_len = count; 595 uio.uio_iov = &iov; 596 uio.uio_iovcnt = 1; 597 uio.uio_offset = IDX_TO_OFF(pages[0]->pindex); 598 uio.uio_resid = count; 599 uio.uio_segflg = UIO_SYSSPACE; 600 uio.uio_rw = UIO_WRITE; 601 uio.uio_td = td; 602 SMBVDEBUG("ofs=%d,resid=%d\n",(int)uio.uio_offset, uio.uio_resid); 603 604 smb_makescred(&scred, td, cred); 605 error = smb_write(smp->sm_share, np->n_fid, &uio, &scred); 606 /* VOP_CLOSE(vp, FWRITE, cred, td);*/ 607 SMBVDEBUG("paged write done: %d\n", error); 608 609 pmap_qremove(kva, npages); 610 #if __FreeBSD_version >= 400000 611 relpbuf(bp, &smbfs_pbuf_freecnt); 612 #else 613 relpbuf(bp); 614 #endif 615 616 if (!error) { 617 int nwritten = round_page(count - uio.uio_resid) / PAGE_SIZE; 618 for (i = 0; i < nwritten; i++) { 619 rtvals[i] = VM_PAGER_OK; 620 vm_page_undirty(pages[i]); 621 } 622 } 623 return rtvals[0]; 624 #endif /* SMBFS_RWGENERIC */ 625 } 626 627 /* 628 * Flush and invalidate all dirty buffers. If another process is already 629 * doing the flush, just wait for completion. 630 */ 631 int 632 smbfs_vinvalbuf(vp, flags, cred, td, intrflg) 633 struct vnode *vp; 634 int flags; 635 struct ucred *cred; 636 struct thread *td; 637 int intrflg; 638 { 639 struct smbnode *np = VTOSMB(vp); 640 int error = 0, slpflag, slptimeo; 641 642 if (vp->v_flag & VXLOCK) 643 return 0; 644 if (intrflg) { 645 slpflag = PCATCH; 646 slptimeo = 2 * hz; 647 } else { 648 slpflag = 0; 649 slptimeo = 0; 650 } 651 while (np->n_flag & NFLUSHINPROG) { 652 np->n_flag |= NFLUSHWANT; 653 error = tsleep((caddr_t)&np->n_flag, PRIBIO + 2, "smfsvinv", slptimeo); 654 error = smb_proc_intr(td->td_proc); 655 if (error == EINTR && intrflg) 656 return EINTR; 657 } 658 np->n_flag |= NFLUSHINPROG; 659 error = vinvalbuf(vp, flags, cred, td, slpflag, 0); 660 while (error) { 661 if (intrflg && (error == ERESTART || error == EINTR)) { 662 np->n_flag &= ~NFLUSHINPROG; 663 if (np->n_flag & NFLUSHWANT) { 664 np->n_flag &= ~NFLUSHWANT; 665 wakeup((caddr_t)&np->n_flag); 666 } 667 return EINTR; 668 } 669 error = vinvalbuf(vp, flags, cred, td, slpflag, 0); 670 } 671 np->n_flag &= ~(NMODIFIED | NFLUSHINPROG); 672 if (np->n_flag & NFLUSHWANT) { 673 np->n_flag &= ~NFLUSHWANT; 674 wakeup((caddr_t)&np->n_flag); 675 } 676 return (error); 677 } 678