1 /*-
2 * SPDX-License-Identifier: BSD-2-Clause
3 *
4 * Copyright (c) 2000-2001 Boris Popov
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26 * SUCH DAMAGE.
27 *
28 */
29 #include <sys/param.h>
30 #include <sys/systm.h>
31 #include <sys/kernel.h>
32 #include <sys/fcntl.h>
33 #include <sys/bio.h>
34 #include <sys/buf.h>
35 #include <sys/mount.h>
36 #include <sys/namei.h>
37 #include <sys/vnode.h>
38 #include <sys/dirent.h>
39 #include <sys/rwlock.h>
40 #include <sys/signalvar.h>
41 #include <sys/sysctl.h>
42 #include <sys/vmmeter.h>
43
44 #include <vm/vm.h>
45 #include <vm/vm_param.h>
46 #include <vm/vm_page.h>
47 #include <vm/vm_extern.h>
48 #include <vm/vm_object.h>
49 #include <vm/vm_pager.h>
50 #include <vm/vnode_pager.h>
51 /*
52 #include <sys/ioccom.h>
53 */
54 #include <netsmb/smb.h>
55 #include <netsmb/smb_conn.h>
56 #include <netsmb/smb_subr.h>
57
58 #include <fs/smbfs/smbfs.h>
59 #include <fs/smbfs/smbfs_node.h>
60 #include <fs/smbfs/smbfs_subr.h>
61
62 /*#define SMBFS_RWGENERIC*/
63
64 extern uma_zone_t smbfs_pbuf_zone;
65
66 static int smbfs_fastlookup = 1;
67
68 SYSCTL_DECL(_vfs_smbfs);
69 SYSCTL_INT(_vfs_smbfs, OID_AUTO, fastlookup, CTLFLAG_RW, &smbfs_fastlookup, 0, "");
70
71 #define DE_SIZE (sizeof(struct dirent))
72
73 static int
smbfs_readvdir(struct vnode * vp,struct uio * uio,struct ucred * cred,int * eofp)74 smbfs_readvdir(struct vnode *vp, struct uio *uio, struct ucred *cred, int *eofp)
75 {
76 struct dirent de;
77 struct componentname cn;
78 struct smb_cred *scred;
79 struct smbfs_fctx *ctx;
80 struct vnode *newvp;
81 struct smbnode *np = VTOSMB(vp);
82 int error/*, *eofflag = ap->a_eofflag*/;
83 long offset, limit;
84
85 np = VTOSMB(vp);
86 SMBVDEBUG("dirname='%s'\n", np->n_name);
87 scred = smbfs_malloc_scred();
88 smb_makescred(scred, uio->uio_td, cred);
89 if (eofp != NULL)
90 *eofp = 0;
91 offset = uio->uio_offset / DE_SIZE; /* offset in the directory */
92 limit = uio->uio_resid / DE_SIZE;
93 if (uio->uio_resid < DE_SIZE || uio->uio_offset < 0) {
94 error = EINVAL;
95 goto out;
96 }
97 while (limit && offset < 2) {
98 limit--;
99 bzero((caddr_t)&de, DE_SIZE);
100 de.d_reclen = DE_SIZE;
101 de.d_fileno = (offset == 0) ? np->n_ino :
102 (np->n_parent ? np->n_parentino : 2);
103 if (de.d_fileno == 0)
104 de.d_fileno = 0x7ffffffd + offset;
105 de.d_off = offset + 1;
106 de.d_namlen = offset + 1;
107 de.d_name[0] = '.';
108 de.d_name[1] = '.';
109 de.d_type = DT_DIR;
110 dirent_terminate(&de);
111 error = uiomove(&de, DE_SIZE, uio);
112 if (error)
113 goto out;
114 offset++;
115 uio->uio_offset += DE_SIZE;
116 }
117 if (limit == 0) {
118 error = 0;
119 goto out;
120 }
121 if (offset != np->n_dirofs || np->n_dirseq == NULL) {
122 SMBVDEBUG("Reopening search %ld:%ld\n", offset, np->n_dirofs);
123 if (np->n_dirseq) {
124 smbfs_findclose(np->n_dirseq, scred);
125 np->n_dirseq = NULL;
126 }
127 np->n_dirofs = 2;
128 error = smbfs_findopen(np, "*", 1,
129 SMB_FA_SYSTEM | SMB_FA_HIDDEN | SMB_FA_DIR,
130 scred, &ctx);
131 if (error) {
132 SMBVDEBUG("can not open search, error = %d", error);
133 goto out;
134 }
135 np->n_dirseq = ctx;
136 } else
137 ctx = np->n_dirseq;
138 while (np->n_dirofs < offset) {
139 error = smbfs_findnext(ctx, offset - np->n_dirofs++, scred);
140 if (error) {
141 smbfs_findclose(np->n_dirseq, scred);
142 np->n_dirseq = NULL;
143 goto out1;
144 }
145 }
146 error = 0;
147 for (; limit; limit--, offset++) {
148 error = smbfs_findnext(ctx, limit, scred);
149 if (error)
150 break;
151 np->n_dirofs++;
152 bzero((caddr_t)&de, DE_SIZE);
153 de.d_reclen = DE_SIZE;
154 de.d_fileno = ctx->f_attr.fa_ino;
155 de.d_off = offset + 1;
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 dirent_terminate(&de);
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(&de, DE_SIZE, uio);
171 if (error)
172 break;
173 }
174 uio->uio_offset = offset * DE_SIZE;
175 out1:
176 if (error == ENOENT) {
177 if (eofp != NULL)
178 *eofp = 1;
179 error = 0;
180 }
181 out:
182 smbfs_free_scred(scred);
183 return error;
184 }
185
186 int
smbfs_readvnode(struct vnode * vp,struct uio * uiop,struct ucred * cred,int * eofp)187 smbfs_readvnode(struct vnode *vp, struct uio *uiop, struct ucred *cred,
188 int *eofp)
189 {
190 struct smbmount *smp = VFSTOSMBFS(vp->v_mount);
191 struct smbnode *np = VTOSMB(vp);
192 struct thread *td;
193 struct vattr vattr;
194 struct smb_cred *scred;
195 int error, lks;
196
197 /*
198 * Protect against method which is not supported for now
199 */
200 if (uiop->uio_segflg == UIO_NOCOPY)
201 return EOPNOTSUPP;
202
203 if (vp->v_type != VREG && vp->v_type != VDIR) {
204 SMBFSERR("vn types other than VREG or VDIR are unsupported !\n");
205 return EIO;
206 }
207 if (uiop->uio_resid == 0)
208 return 0;
209 if (uiop->uio_offset < 0)
210 return EINVAL;
211 /* if (uiop->uio_offset + uiop->uio_resid > smp->nm_maxfilesize)
212 return EFBIG;*/
213 td = uiop->uio_td;
214 if (vp->v_type == VDIR) {
215 lks = LK_EXCLUSIVE; /* lockstatus(vp->v_vnlock); */
216 if (lks == LK_SHARED)
217 vn_lock(vp, LK_UPGRADE | LK_RETRY);
218 error = smbfs_readvdir(vp, uiop, cred, eofp);
219 if (lks == LK_SHARED)
220 vn_lock(vp, LK_DOWNGRADE | LK_RETRY);
221 return error;
222 }
223
224 /* biosize = SSTOCN(smp->sm_share)->sc_txmax;*/
225 if (np->n_flag & NMODIFIED) {
226 smbfs_attr_cacheremove(vp);
227 error = VOP_GETATTR(vp, &vattr, cred);
228 if (error)
229 return error;
230 np->n_mtime.tv_sec = vattr.va_mtime.tv_sec;
231 } else {
232 error = VOP_GETATTR(vp, &vattr, cred);
233 if (error)
234 return error;
235 if (np->n_mtime.tv_sec != vattr.va_mtime.tv_sec) {
236 error = smbfs_vinvalbuf(vp, td);
237 if (error)
238 return error;
239 np->n_mtime.tv_sec = vattr.va_mtime.tv_sec;
240 }
241 }
242 scred = smbfs_malloc_scred();
243 smb_makescred(scred, td, cred);
244 error = smb_read(smp->sm_share, np->n_fid, uiop, scred);
245 smbfs_free_scred(scred);
246 return (error);
247 }
248
249 int
smbfs_writevnode(struct vnode * vp,struct uio * uiop,struct ucred * cred,int ioflag)250 smbfs_writevnode(struct vnode *vp, struct uio *uiop,
251 struct ucred *cred, int ioflag)
252 {
253 struct smbmount *smp = VTOSMBFS(vp);
254 struct smbnode *np = VTOSMB(vp);
255 struct smb_cred *scred;
256 struct thread *td;
257 int error = 0;
258
259 if (vp->v_type != VREG) {
260 SMBERROR("vn types other than VREG unsupported !\n");
261 return EIO;
262 }
263 SMBVDEBUG("ofs=%jd,resid=%zd\n", (intmax_t)uiop->uio_offset,
264 uiop->uio_resid);
265 if (uiop->uio_offset < 0)
266 return EINVAL;
267 /* if (uiop->uio_offset + uiop->uio_resid > smp->nm_maxfilesize)
268 return (EFBIG);*/
269 td = uiop->uio_td;
270 if (ioflag & (IO_APPEND | IO_SYNC)) {
271 if (np->n_flag & NMODIFIED) {
272 smbfs_attr_cacheremove(vp);
273 error = smbfs_vinvalbuf(vp, td);
274 if (error)
275 return error;
276 }
277 if (ioflag & IO_APPEND) {
278 #ifdef notyet
279 /*
280 * File size can be changed by another client
281 */
282 smbfs_attr_cacheremove(vp);
283 error = VOP_GETATTR(vp, &vattr, cred);
284 if (error) return (error);
285 #endif
286 uiop->uio_offset = np->n_size;
287 }
288 }
289 if (uiop->uio_resid == 0)
290 return 0;
291
292 error = vn_rlimit_fsize(vp, uiop, td);
293 if (error != 0)
294 return (error);
295
296 scred = smbfs_malloc_scred();
297 smb_makescred(scred, td, cred);
298 error = smb_write(smp->sm_share, np->n_fid, uiop, scred);
299 smbfs_free_scred(scred);
300 SMBVDEBUG("after: ofs=%jd,resid=%zd\n", (intmax_t)uiop->uio_offset,
301 uiop->uio_resid);
302 if (!error) {
303 if (uiop->uio_offset > np->n_size) {
304 np->n_size = uiop->uio_offset;
305 vnode_pager_setsize(vp, np->n_size);
306 }
307 }
308 return error;
309 }
310
311 /*
312 * Do an I/O operation to/from a cache block.
313 */
314 int
smbfs_doio(struct vnode * vp,struct buf * bp,struct ucred * cr,struct thread * td)315 smbfs_doio(struct vnode *vp, struct buf *bp, struct ucred *cr, struct thread *td)
316 {
317 struct smbmount *smp = VFSTOSMBFS(vp->v_mount);
318 struct smbnode *np = VTOSMB(vp);
319 struct uio *uiop;
320 struct iovec io;
321 struct smb_cred *scred;
322 int error = 0;
323
324 uiop = malloc(sizeof(struct uio), M_SMBFSDATA, M_WAITOK);
325 uiop->uio_iov = &io;
326 uiop->uio_iovcnt = 1;
327 uiop->uio_segflg = UIO_SYSSPACE;
328 uiop->uio_td = td;
329
330 scred = smbfs_malloc_scred();
331 smb_makescred(scred, td, cr);
332
333 if (bp->b_iocmd == BIO_READ) {
334 io.iov_len = uiop->uio_resid = bp->b_bcount;
335 io.iov_base = bp->b_data;
336 uiop->uio_rw = UIO_READ;
337 switch (vp->v_type) {
338 case VREG:
339 uiop->uio_offset = ((off_t)bp->b_blkno) * DEV_BSIZE;
340 error = smb_read(smp->sm_share, np->n_fid, uiop, scred);
341 if (error)
342 break;
343 if (uiop->uio_resid) {
344 int left = uiop->uio_resid;
345 int nread = bp->b_bcount - left;
346 if (left > 0)
347 bzero((char *)bp->b_data + nread, left);
348 }
349 break;
350 default:
351 printf("smbfs_doio: type %x unexpected\n",vp->v_type);
352 break;
353 }
354 if (error) {
355 bp->b_error = error;
356 bp->b_ioflags |= BIO_ERROR;
357 }
358 } else { /* write */
359 if (((bp->b_blkno * DEV_BSIZE) + bp->b_dirtyend) > np->n_size)
360 bp->b_dirtyend = np->n_size - (bp->b_blkno * DEV_BSIZE);
361
362 if (bp->b_dirtyend > bp->b_dirtyoff) {
363 io.iov_len = uiop->uio_resid = bp->b_dirtyend - bp->b_dirtyoff;
364 uiop->uio_offset = ((off_t)bp->b_blkno) * DEV_BSIZE + bp->b_dirtyoff;
365 io.iov_base = (char *)bp->b_data + bp->b_dirtyoff;
366 uiop->uio_rw = UIO_WRITE;
367 error = smb_write(smp->sm_share, np->n_fid, uiop, scred);
368
369 /*
370 * For an interrupted write, the buffer is still valid
371 * and the write hasn't been pushed to the server yet,
372 * so we can't set BIO_ERROR and report the interruption
373 * by setting B_EINTR. For the B_ASYNC case, B_EINTR
374 * is not relevant, so the rpc attempt is essentially
375 * a noop. For the case of a V3 write rpc not being
376 * committed to stable storage, the block is still
377 * dirty and requires either a commit rpc or another
378 * write rpc with iomode == NFSV3WRITE_FILESYNC before
379 * the block is reused. This is indicated by setting
380 * the B_DELWRI and B_NEEDCOMMIT flags.
381 */
382 if (error == EINTR
383 || (!error && (bp->b_flags & B_NEEDCOMMIT))) {
384 bp->b_flags &= ~(B_INVAL|B_NOCACHE);
385 if ((bp->b_flags & B_ASYNC) == 0)
386 bp->b_flags |= B_EINTR;
387 if ((bp->b_flags & B_PAGING) == 0) {
388 bdirty(bp);
389 bp->b_flags &= ~B_DONE;
390 }
391 if ((bp->b_flags & B_ASYNC) == 0)
392 bp->b_flags |= B_EINTR;
393 } else {
394 if (error) {
395 bp->b_ioflags |= BIO_ERROR;
396 bp->b_error = error;
397 }
398 bp->b_dirtyoff = bp->b_dirtyend = 0;
399 }
400 } else {
401 bp->b_resid = 0;
402 bufdone(bp);
403 free(uiop, M_SMBFSDATA);
404 smbfs_free_scred(scred);
405 return 0;
406 }
407 }
408 bp->b_resid = uiop->uio_resid;
409 bufdone(bp);
410 free(uiop, M_SMBFSDATA);
411 smbfs_free_scred(scred);
412 return error;
413 }
414
415 /*
416 * Vnode op for VM getpages.
417 * Wish wish .... get rid from multiple IO routines
418 */
419 int
smbfs_getpages(struct vop_getpages_args * ap)420 smbfs_getpages(struct vop_getpages_args *ap)
421 {
422 #ifdef SMBFS_RWGENERIC
423 return vop_stdgetpages(ap);
424 #else
425 int i, error, nextoff, size, toff, npages, count;
426 struct uio uio;
427 struct iovec iov;
428 vm_offset_t kva;
429 struct buf *bp;
430 struct vnode *vp;
431 struct thread *td;
432 struct ucred *cred;
433 struct smbmount *smp;
434 struct smbnode *np;
435 struct smb_cred *scred;
436 vm_object_t object;
437 vm_page_t *pages;
438
439 vp = ap->a_vp;
440 if ((object = vp->v_object) == NULL) {
441 printf("smbfs_getpages: called with non-merged cache vnode??\n");
442 return VM_PAGER_ERROR;
443 }
444
445 td = curthread; /* XXX */
446 cred = td->td_ucred; /* XXX */
447 np = VTOSMB(vp);
448 smp = VFSTOSMBFS(vp->v_mount);
449 pages = ap->a_m;
450 npages = ap->a_count;
451
452 /*
453 * If the requested page is partially valid, just return it and
454 * allow the pager to zero-out the blanks. Partially valid pages
455 * can only occur at the file EOF.
456 *
457 * XXXGL: is that true for SMB filesystem?
458 */
459 VM_OBJECT_WLOCK(object);
460 if (!vm_page_none_valid(pages[npages - 1]) && --npages == 0)
461 goto out;
462 VM_OBJECT_WUNLOCK(object);
463
464 scred = smbfs_malloc_scred();
465 smb_makescred(scred, td, cred);
466
467 bp = uma_zalloc(smbfs_pbuf_zone, M_WAITOK);
468
469 kva = (vm_offset_t) bp->b_data;
470 pmap_qenter(kva, pages, npages);
471 VM_CNT_INC(v_vnodein);
472 VM_CNT_ADD(v_vnodepgsin, npages);
473
474 count = npages << PAGE_SHIFT;
475 iov.iov_base = (caddr_t) kva;
476 iov.iov_len = count;
477 uio.uio_iov = &iov;
478 uio.uio_iovcnt = 1;
479 uio.uio_offset = IDX_TO_OFF(pages[0]->pindex);
480 uio.uio_resid = count;
481 uio.uio_segflg = UIO_SYSSPACE;
482 uio.uio_rw = UIO_READ;
483 uio.uio_td = td;
484
485 error = smb_read(smp->sm_share, np->n_fid, &uio, scred);
486 smbfs_free_scred(scred);
487 pmap_qremove(kva, npages);
488
489 uma_zfree(smbfs_pbuf_zone, bp);
490
491 if (error && (uio.uio_resid == count)) {
492 printf("smbfs_getpages: error %d\n",error);
493 return VM_PAGER_ERROR;
494 }
495
496 size = count - uio.uio_resid;
497
498 VM_OBJECT_WLOCK(object);
499 for (i = 0, toff = 0; i < npages; i++, toff = nextoff) {
500 vm_page_t m;
501 nextoff = toff + PAGE_SIZE;
502 m = pages[i];
503
504 if (nextoff <= size) {
505 /*
506 * Read operation filled an entire page
507 */
508 vm_page_valid(m);
509 KASSERT(m->dirty == 0,
510 ("smbfs_getpages: page %p is dirty", m));
511 } else if (size > toff) {
512 /*
513 * Read operation filled a partial page.
514 */
515 vm_page_invalid(m);
516 vm_page_set_valid_range(m, 0, size - toff);
517 KASSERT(m->dirty == 0,
518 ("smbfs_getpages: page %p is dirty", m));
519 } else {
520 /*
521 * Read operation was short. If no error occurred
522 * we may have hit a zero-fill section. We simply
523 * leave valid set to 0.
524 */
525 ;
526 }
527 }
528 out:
529 VM_OBJECT_WUNLOCK(object);
530 if (ap->a_rbehind)
531 *ap->a_rbehind = 0;
532 if (ap->a_rahead)
533 *ap->a_rahead = 0;
534 return (VM_PAGER_OK);
535 #endif /* SMBFS_RWGENERIC */
536 }
537
538 /*
539 * Vnode op for VM putpages.
540 * possible bug: all IO done in sync mode
541 * Note that vop_close always invalidate pages before close, so it's
542 * not necessary to open vnode.
543 */
544 int
smbfs_putpages(struct vop_putpages_args * ap)545 smbfs_putpages(struct vop_putpages_args *ap)
546 {
547 int error;
548 struct vnode *vp = ap->a_vp;
549 struct thread *td;
550 struct ucred *cred;
551
552 #ifdef SMBFS_RWGENERIC
553 td = curthread; /* XXX */
554 cred = td->td_ucred; /* XXX */
555 VOP_OPEN(vp, FWRITE, cred, td, NULL);
556 error = vop_stdputpages(ap);
557 VOP_CLOSE(vp, FWRITE, cred, td);
558 return error;
559 #else
560 struct uio uio;
561 struct iovec iov;
562 vm_offset_t kva;
563 struct buf *bp;
564 int i, npages, count;
565 int *rtvals;
566 struct smbmount *smp;
567 struct smbnode *np;
568 struct smb_cred *scred;
569 vm_page_t *pages;
570
571 td = curthread; /* XXX */
572 cred = td->td_ucred; /* XXX */
573 /* VOP_OPEN(vp, FWRITE, cred, td, NULL);*/
574 np = VTOSMB(vp);
575 smp = VFSTOSMBFS(vp->v_mount);
576 pages = ap->a_m;
577 count = ap->a_count;
578 rtvals = ap->a_rtvals;
579 npages = btoc(count);
580
581 for (i = 0; i < npages; i++) {
582 rtvals[i] = VM_PAGER_ERROR;
583 }
584
585 bp = uma_zalloc(smbfs_pbuf_zone, M_WAITOK);
586
587 kva = (vm_offset_t) bp->b_data;
588 pmap_qenter(kva, pages, npages);
589 VM_CNT_INC(v_vnodeout);
590 VM_CNT_ADD(v_vnodepgsout, count);
591
592 iov.iov_base = (caddr_t) kva;
593 iov.iov_len = count;
594 uio.uio_iov = &iov;
595 uio.uio_iovcnt = 1;
596 uio.uio_offset = IDX_TO_OFF(pages[0]->pindex);
597 uio.uio_resid = count;
598 uio.uio_segflg = UIO_SYSSPACE;
599 uio.uio_rw = UIO_WRITE;
600 uio.uio_td = td;
601 SMBVDEBUG("ofs=%jd,resid=%zd\n", (intmax_t)uio.uio_offset,
602 uio.uio_resid);
603
604 scred = smbfs_malloc_scred();
605 smb_makescred(scred, td, cred);
606 error = smb_write(smp->sm_share, np->n_fid, &uio, scred);
607 smbfs_free_scred(scred);
608 /* VOP_CLOSE(vp, FWRITE, cred, td);*/
609 SMBVDEBUG("paged write done: %d\n", error);
610
611 pmap_qremove(kva, npages);
612
613 uma_zfree(smbfs_pbuf_zone, bp);
614
615 if (error == 0) {
616 vnode_pager_undirty_pages(pages, rtvals, count - uio.uio_resid,
617 npages * PAGE_SIZE, npages * PAGE_SIZE);
618 }
619 return (rtvals[0]);
620 #endif /* SMBFS_RWGENERIC */
621 }
622
623 /*
624 * Flush and invalidate all dirty buffers. If another process is already
625 * doing the flush, just wait for completion.
626 */
627 int
smbfs_vinvalbuf(struct vnode * vp,struct thread * td)628 smbfs_vinvalbuf(struct vnode *vp, struct thread *td)
629 {
630 struct smbnode *np = VTOSMB(vp);
631 int error = 0;
632
633 if (VN_IS_DOOMED(vp))
634 return 0;
635
636 while (np->n_flag & NFLUSHINPROG) {
637 np->n_flag |= NFLUSHWANT;
638 error = tsleep(&np->n_flag, PRIBIO, "smfsvinv", 2 * hz);
639 error = smb_td_intr(td);
640 if (error == EINTR)
641 return EINTR;
642 }
643 np->n_flag |= NFLUSHINPROG;
644
645 vnode_pager_clean_sync(vp);
646 error = vinvalbuf(vp, V_SAVE, PCATCH, 0);
647 while (error) {
648 if (error == ERESTART || error == EINTR) {
649 np->n_flag &= ~NFLUSHINPROG;
650 if (np->n_flag & NFLUSHWANT) {
651 np->n_flag &= ~NFLUSHWANT;
652 wakeup(&np->n_flag);
653 }
654 return EINTR;
655 }
656 error = vinvalbuf(vp, V_SAVE, PCATCH, 0);
657 }
658 np->n_flag &= ~(NMODIFIED | NFLUSHINPROG);
659 if (np->n_flag & NFLUSHWANT) {
660 np->n_flag &= ~NFLUSHWANT;
661 wakeup(&np->n_flag);
662 }
663 return (error);
664 }
665