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)74 smbfs_readvdir(struct vnode *vp, struct uio *uio, struct ucred *cred)
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 offset = uio->uio_offset / DE_SIZE; /* offset in the directory */
90 limit = uio->uio_resid / DE_SIZE;
91 if (uio->uio_resid < DE_SIZE || uio->uio_offset < 0) {
92 error = EINVAL;
93 goto out;
94 }
95 while (limit && offset < 2) {
96 limit--;
97 bzero((caddr_t)&de, DE_SIZE);
98 de.d_reclen = DE_SIZE;
99 de.d_fileno = (offset == 0) ? np->n_ino :
100 (np->n_parent ? np->n_parentino : 2);
101 if (de.d_fileno == 0)
102 de.d_fileno = 0x7ffffffd + offset;
103 de.d_off = offset + 1;
104 de.d_namlen = offset + 1;
105 de.d_name[0] = '.';
106 de.d_name[1] = '.';
107 de.d_type = DT_DIR;
108 dirent_terminate(&de);
109 error = uiomove(&de, DE_SIZE, uio);
110 if (error)
111 goto out;
112 offset++;
113 uio->uio_offset += DE_SIZE;
114 }
115 if (limit == 0) {
116 error = 0;
117 goto out;
118 }
119 if (offset != np->n_dirofs || np->n_dirseq == NULL) {
120 SMBVDEBUG("Reopening search %ld:%ld\n", offset, np->n_dirofs);
121 if (np->n_dirseq) {
122 smbfs_findclose(np->n_dirseq, scred);
123 np->n_dirseq = NULL;
124 }
125 np->n_dirofs = 2;
126 error = smbfs_findopen(np, "*", 1,
127 SMB_FA_SYSTEM | SMB_FA_HIDDEN | SMB_FA_DIR,
128 scred, &ctx);
129 if (error) {
130 SMBVDEBUG("can not open search, error = %d", error);
131 goto out;
132 }
133 np->n_dirseq = ctx;
134 } else
135 ctx = np->n_dirseq;
136 while (np->n_dirofs < offset) {
137 error = smbfs_findnext(ctx, offset - np->n_dirofs++, scred);
138 if (error) {
139 smbfs_findclose(np->n_dirseq, scred);
140 np->n_dirseq = NULL;
141 error = ENOENT ? 0 : error;
142 goto out;
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_off = offset + 1;
155 de.d_type = (ctx->f_attr.fa_attr & SMB_FA_DIR) ? DT_DIR : DT_REG;
156 de.d_namlen = ctx->f_nmlen;
157 bcopy(ctx->f_name, de.d_name, de.d_namlen);
158 dirent_terminate(&de);
159 if (smbfs_fastlookup) {
160 error = smbfs_nget(vp->v_mount, vp, ctx->f_name,
161 ctx->f_nmlen, &ctx->f_attr, &newvp);
162 if (!error) {
163 cn.cn_nameptr = de.d_name;
164 cn.cn_namelen = de.d_namlen;
165 cache_enter(vp, newvp, &cn);
166 vput(newvp);
167 }
168 }
169 error = uiomove(&de, DE_SIZE, uio);
170 if (error)
171 break;
172 }
173 if (error == ENOENT)
174 error = 0;
175 uio->uio_offset = offset * DE_SIZE;
176 out:
177 smbfs_free_scred(scred);
178 return error;
179 }
180
181 int
smbfs_readvnode(struct vnode * vp,struct uio * uiop,struct ucred * cred)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 /*
192 * Protect against method which is not supported for now
193 */
194 if (uiop->uio_segflg == UIO_NOCOPY)
195 return EOPNOTSUPP;
196
197 if (vp->v_type != VREG && vp->v_type != VDIR) {
198 SMBFSERR("vn types other than VREG or VDIR are unsupported !\n");
199 return EIO;
200 }
201 if (uiop->uio_resid == 0)
202 return 0;
203 if (uiop->uio_offset < 0)
204 return EINVAL;
205 /* if (uiop->uio_offset + uiop->uio_resid > smp->nm_maxfilesize)
206 return EFBIG;*/
207 td = uiop->uio_td;
208 if (vp->v_type == VDIR) {
209 lks = LK_EXCLUSIVE; /* lockstatus(vp->v_vnlock); */
210 if (lks == LK_SHARED)
211 vn_lock(vp, LK_UPGRADE | LK_RETRY);
212 error = smbfs_readvdir(vp, uiop, cred);
213 if (lks == LK_SHARED)
214 vn_lock(vp, LK_DOWNGRADE | LK_RETRY);
215 return error;
216 }
217
218 /* biosize = SSTOCN(smp->sm_share)->sc_txmax;*/
219 if (np->n_flag & NMODIFIED) {
220 smbfs_attr_cacheremove(vp);
221 error = VOP_GETATTR(vp, &vattr, cred);
222 if (error)
223 return error;
224 np->n_mtime.tv_sec = vattr.va_mtime.tv_sec;
225 } else {
226 error = VOP_GETATTR(vp, &vattr, cred);
227 if (error)
228 return error;
229 if (np->n_mtime.tv_sec != vattr.va_mtime.tv_sec) {
230 error = smbfs_vinvalbuf(vp, td);
231 if (error)
232 return error;
233 np->n_mtime.tv_sec = vattr.va_mtime.tv_sec;
234 }
235 }
236 scred = smbfs_malloc_scred();
237 smb_makescred(scred, td, cred);
238 error = smb_read(smp->sm_share, np->n_fid, uiop, scred);
239 smbfs_free_scred(scred);
240 return (error);
241 }
242
243 int
smbfs_writevnode(struct vnode * vp,struct uio * uiop,struct ucred * cred,int ioflag)244 smbfs_writevnode(struct vnode *vp, struct uio *uiop,
245 struct ucred *cred, int ioflag)
246 {
247 struct smbmount *smp = VTOSMBFS(vp);
248 struct smbnode *np = VTOSMB(vp);
249 struct smb_cred *scred;
250 struct thread *td;
251 int error = 0;
252
253 if (vp->v_type != VREG) {
254 SMBERROR("vn types other than VREG unsupported !\n");
255 return EIO;
256 }
257 SMBVDEBUG("ofs=%jd,resid=%zd\n", (intmax_t)uiop->uio_offset,
258 uiop->uio_resid);
259 if (uiop->uio_offset < 0)
260 return EINVAL;
261 /* if (uiop->uio_offset + uiop->uio_resid > smp->nm_maxfilesize)
262 return (EFBIG);*/
263 td = uiop->uio_td;
264 if (ioflag & (IO_APPEND | IO_SYNC)) {
265 if (np->n_flag & NMODIFIED) {
266 smbfs_attr_cacheremove(vp);
267 error = smbfs_vinvalbuf(vp, td);
268 if (error)
269 return error;
270 }
271 if (ioflag & IO_APPEND) {
272 #ifdef notyet
273 /*
274 * File size can be changed by another client
275 */
276 smbfs_attr_cacheremove(vp);
277 error = VOP_GETATTR(vp, &vattr, cred);
278 if (error) return (error);
279 #endif
280 uiop->uio_offset = np->n_size;
281 }
282 }
283 if (uiop->uio_resid == 0)
284 return 0;
285
286 error = vn_rlimit_fsize(vp, uiop, td);
287 if (error != 0)
288 return (error);
289
290 scred = smbfs_malloc_scred();
291 smb_makescred(scred, td, cred);
292 error = smb_write(smp->sm_share, np->n_fid, uiop, scred);
293 smbfs_free_scred(scred);
294 SMBVDEBUG("after: ofs=%jd,resid=%zd\n", (intmax_t)uiop->uio_offset,
295 uiop->uio_resid);
296 if (!error) {
297 if (uiop->uio_offset > np->n_size) {
298 np->n_size = uiop->uio_offset;
299 vnode_pager_setsize(vp, np->n_size);
300 }
301 }
302 return error;
303 }
304
305 /*
306 * Do an I/O operation to/from a cache block.
307 */
308 int
smbfs_doio(struct vnode * vp,struct buf * bp,struct ucred * cr,struct thread * td)309 smbfs_doio(struct vnode *vp, struct buf *bp, struct ucred *cr, struct thread *td)
310 {
311 struct smbmount *smp = VFSTOSMBFS(vp->v_mount);
312 struct smbnode *np = VTOSMB(vp);
313 struct uio *uiop;
314 struct iovec io;
315 struct smb_cred *scred;
316 int error = 0;
317
318 uiop = malloc(sizeof(struct uio), M_SMBFSDATA, M_WAITOK);
319 uiop->uio_iov = &io;
320 uiop->uio_iovcnt = 1;
321 uiop->uio_segflg = UIO_SYSSPACE;
322 uiop->uio_td = td;
323
324 scred = smbfs_malloc_scred();
325 smb_makescred(scred, td, cr);
326
327 if (bp->b_iocmd == BIO_READ) {
328 io.iov_len = uiop->uio_resid = bp->b_bcount;
329 io.iov_base = bp->b_data;
330 uiop->uio_rw = UIO_READ;
331 switch (vp->v_type) {
332 case VREG:
333 uiop->uio_offset = ((off_t)bp->b_blkno) * DEV_BSIZE;
334 error = smb_read(smp->sm_share, np->n_fid, uiop, scred);
335 if (error)
336 break;
337 if (uiop->uio_resid) {
338 int left = uiop->uio_resid;
339 int nread = bp->b_bcount - left;
340 if (left > 0)
341 bzero((char *)bp->b_data + nread, left);
342 }
343 break;
344 default:
345 printf("smbfs_doio: type %x unexpected\n",vp->v_type);
346 break;
347 }
348 if (error) {
349 bp->b_error = error;
350 bp->b_ioflags |= BIO_ERROR;
351 }
352 } else { /* write */
353 if (((bp->b_blkno * DEV_BSIZE) + bp->b_dirtyend) > np->n_size)
354 bp->b_dirtyend = np->n_size - (bp->b_blkno * DEV_BSIZE);
355
356 if (bp->b_dirtyend > bp->b_dirtyoff) {
357 io.iov_len = uiop->uio_resid = bp->b_dirtyend - bp->b_dirtyoff;
358 uiop->uio_offset = ((off_t)bp->b_blkno) * DEV_BSIZE + bp->b_dirtyoff;
359 io.iov_base = (char *)bp->b_data + bp->b_dirtyoff;
360 uiop->uio_rw = UIO_WRITE;
361 error = smb_write(smp->sm_share, np->n_fid, uiop, scred);
362
363 /*
364 * For an interrupted write, the buffer is still valid
365 * and the write hasn't been pushed to the server yet,
366 * so we can't set BIO_ERROR and report the interruption
367 * by setting B_EINTR. For the B_ASYNC case, B_EINTR
368 * is not relevant, so the rpc attempt is essentially
369 * a noop. For the case of a V3 write rpc not being
370 * committed to stable storage, the block is still
371 * dirty and requires either a commit rpc or another
372 * write rpc with iomode == NFSV3WRITE_FILESYNC before
373 * the block is reused. This is indicated by setting
374 * the B_DELWRI and B_NEEDCOMMIT flags.
375 */
376 if (error == EINTR
377 || (!error && (bp->b_flags & B_NEEDCOMMIT))) {
378 bp->b_flags &= ~(B_INVAL|B_NOCACHE);
379 if ((bp->b_flags & B_ASYNC) == 0)
380 bp->b_flags |= B_EINTR;
381 if ((bp->b_flags & B_PAGING) == 0) {
382 bdirty(bp);
383 bp->b_flags &= ~B_DONE;
384 }
385 if ((bp->b_flags & B_ASYNC) == 0)
386 bp->b_flags |= B_EINTR;
387 } else {
388 if (error) {
389 bp->b_ioflags |= BIO_ERROR;
390 bp->b_error = error;
391 }
392 bp->b_dirtyoff = bp->b_dirtyend = 0;
393 }
394 } else {
395 bp->b_resid = 0;
396 bufdone(bp);
397 free(uiop, M_SMBFSDATA);
398 smbfs_free_scred(scred);
399 return 0;
400 }
401 }
402 bp->b_resid = uiop->uio_resid;
403 bufdone(bp);
404 free(uiop, M_SMBFSDATA);
405 smbfs_free_scred(scred);
406 return error;
407 }
408
409 /*
410 * Vnode op for VM getpages.
411 * Wish wish .... get rid from multiple IO routines
412 */
413 int
smbfs_getpages(struct vop_getpages_args * ap)414 smbfs_getpages(struct vop_getpages_args *ap)
415 {
416 #ifdef SMBFS_RWGENERIC
417 return vop_stdgetpages(ap);
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;
426 struct ucred *cred;
427 struct smbmount *smp;
428 struct smbnode *np;
429 struct smb_cred *scred;
430 vm_object_t object;
431 vm_page_t *pages;
432
433 vp = ap->a_vp;
434 if ((object = vp->v_object) == NULL) {
435 printf("smbfs_getpages: called with non-merged cache vnode??\n");
436 return VM_PAGER_ERROR;
437 }
438
439 td = curthread; /* XXX */
440 cred = td->td_ucred; /* XXX */
441 np = VTOSMB(vp);
442 smp = VFSTOSMBFS(vp->v_mount);
443 pages = ap->a_m;
444 npages = ap->a_count;
445
446 /*
447 * If the requested page is partially valid, just return it and
448 * allow the pager to zero-out the blanks. Partially valid pages
449 * can only occur at the file EOF.
450 *
451 * XXXGL: is that true for SMB filesystem?
452 */
453 VM_OBJECT_WLOCK(object);
454 if (!vm_page_none_valid(pages[npages - 1]) && --npages == 0)
455 goto out;
456 VM_OBJECT_WUNLOCK(object);
457
458 scred = smbfs_malloc_scred();
459 smb_makescred(scred, td, cred);
460
461 bp = uma_zalloc(smbfs_pbuf_zone, M_WAITOK);
462
463 kva = (vm_offset_t) bp->b_data;
464 pmap_qenter(kva, pages, npages);
465 VM_CNT_INC(v_vnodein);
466 VM_CNT_ADD(v_vnodepgsin, npages);
467
468 count = npages << PAGE_SHIFT;
469 iov.iov_base = (caddr_t) kva;
470 iov.iov_len = count;
471 uio.uio_iov = &iov;
472 uio.uio_iovcnt = 1;
473 uio.uio_offset = IDX_TO_OFF(pages[0]->pindex);
474 uio.uio_resid = count;
475 uio.uio_segflg = UIO_SYSSPACE;
476 uio.uio_rw = UIO_READ;
477 uio.uio_td = td;
478
479 error = smb_read(smp->sm_share, np->n_fid, &uio, scred);
480 smbfs_free_scred(scred);
481 pmap_qremove(kva, npages);
482
483 uma_zfree(smbfs_pbuf_zone, bp);
484
485 if (error && (uio.uio_resid == count)) {
486 printf("smbfs_getpages: error %d\n",error);
487 return VM_PAGER_ERROR;
488 }
489
490 size = count - uio.uio_resid;
491
492 VM_OBJECT_WLOCK(object);
493 for (i = 0, toff = 0; i < npages; i++, toff = nextoff) {
494 vm_page_t m;
495 nextoff = toff + PAGE_SIZE;
496 m = pages[i];
497
498 if (nextoff <= size) {
499 /*
500 * Read operation filled an entire page
501 */
502 vm_page_valid(m);
503 KASSERT(m->dirty == 0,
504 ("smbfs_getpages: page %p is dirty", m));
505 } else if (size > toff) {
506 /*
507 * Read operation filled a partial page.
508 */
509 vm_page_invalid(m);
510 vm_page_set_valid_range(m, 0, size - toff);
511 KASSERT(m->dirty == 0,
512 ("smbfs_getpages: page %p is dirty", m));
513 } else {
514 /*
515 * Read operation was short. If no error occurred
516 * we may have hit a zero-fill section. We simply
517 * leave valid set to 0.
518 */
519 ;
520 }
521 }
522 out:
523 VM_OBJECT_WUNLOCK(object);
524 if (ap->a_rbehind)
525 *ap->a_rbehind = 0;
526 if (ap->a_rahead)
527 *ap->a_rahead = 0;
528 return (VM_PAGER_OK);
529 #endif /* SMBFS_RWGENERIC */
530 }
531
532 /*
533 * Vnode op for VM putpages.
534 * possible bug: all IO done in sync mode
535 * Note that vop_close always invalidate pages before close, so it's
536 * not necessary to open vnode.
537 */
538 int
smbfs_putpages(struct vop_putpages_args * ap)539 smbfs_putpages(struct vop_putpages_args *ap)
540 {
541 int error;
542 struct vnode *vp = ap->a_vp;
543 struct thread *td;
544 struct ucred *cred;
545
546 #ifdef SMBFS_RWGENERIC
547 td = curthread; /* XXX */
548 cred = td->td_ucred; /* XXX */
549 VOP_OPEN(vp, FWRITE, cred, td, NULL);
550 error = vop_stdputpages(ap);
551 VOP_CLOSE(vp, FWRITE, cred, td);
552 return error;
553 #else
554 struct uio uio;
555 struct iovec iov;
556 vm_offset_t kva;
557 struct buf *bp;
558 int i, npages, count;
559 int *rtvals;
560 struct smbmount *smp;
561 struct smbnode *np;
562 struct smb_cred *scred;
563 vm_page_t *pages;
564
565 td = curthread; /* XXX */
566 cred = td->td_ucred; /* XXX */
567 /* VOP_OPEN(vp, FWRITE, cred, td, NULL);*/
568 np = VTOSMB(vp);
569 smp = VFSTOSMBFS(vp->v_mount);
570 pages = ap->a_m;
571 count = ap->a_count;
572 rtvals = ap->a_rtvals;
573 npages = btoc(count);
574
575 for (i = 0; i < npages; i++) {
576 rtvals[i] = VM_PAGER_ERROR;
577 }
578
579 bp = uma_zalloc(smbfs_pbuf_zone, M_WAITOK);
580
581 kva = (vm_offset_t) bp->b_data;
582 pmap_qenter(kva, pages, npages);
583 VM_CNT_INC(v_vnodeout);
584 VM_CNT_ADD(v_vnodepgsout, count);
585
586 iov.iov_base = (caddr_t) kva;
587 iov.iov_len = count;
588 uio.uio_iov = &iov;
589 uio.uio_iovcnt = 1;
590 uio.uio_offset = IDX_TO_OFF(pages[0]->pindex);
591 uio.uio_resid = count;
592 uio.uio_segflg = UIO_SYSSPACE;
593 uio.uio_rw = UIO_WRITE;
594 uio.uio_td = td;
595 SMBVDEBUG("ofs=%jd,resid=%zd\n", (intmax_t)uio.uio_offset,
596 uio.uio_resid);
597
598 scred = smbfs_malloc_scred();
599 smb_makescred(scred, td, cred);
600 error = smb_write(smp->sm_share, np->n_fid, &uio, scred);
601 smbfs_free_scred(scred);
602 /* VOP_CLOSE(vp, FWRITE, cred, td);*/
603 SMBVDEBUG("paged write done: %d\n", error);
604
605 pmap_qremove(kva, npages);
606
607 uma_zfree(smbfs_pbuf_zone, bp);
608
609 if (error == 0) {
610 vnode_pager_undirty_pages(pages, rtvals, count - uio.uio_resid,
611 npages * PAGE_SIZE, npages * PAGE_SIZE);
612 }
613 return (rtvals[0]);
614 #endif /* SMBFS_RWGENERIC */
615 }
616
617 /*
618 * Flush and invalidate all dirty buffers. If another process is already
619 * doing the flush, just wait for completion.
620 */
621 int
smbfs_vinvalbuf(struct vnode * vp,struct thread * td)622 smbfs_vinvalbuf(struct vnode *vp, struct thread *td)
623 {
624 struct smbnode *np = VTOSMB(vp);
625 int error = 0;
626
627 if (VN_IS_DOOMED(vp))
628 return 0;
629
630 while (np->n_flag & NFLUSHINPROG) {
631 np->n_flag |= NFLUSHWANT;
632 error = tsleep(&np->n_flag, PRIBIO + 2, "smfsvinv", 2 * hz);
633 error = smb_td_intr(td);
634 if (error == EINTR)
635 return EINTR;
636 }
637 np->n_flag |= NFLUSHINPROG;
638
639 vnode_pager_clean_sync(vp);
640 error = vinvalbuf(vp, V_SAVE, PCATCH, 0);
641 while (error) {
642 if (error == ERESTART || error == EINTR) {
643 np->n_flag &= ~NFLUSHINPROG;
644 if (np->n_flag & NFLUSHWANT) {
645 np->n_flag &= ~NFLUSHWANT;
646 wakeup(&np->n_flag);
647 }
648 return EINTR;
649 }
650 error = vinvalbuf(vp, V_SAVE, PCATCH, 0);
651 }
652 np->n_flag &= ~(NMODIFIED | NFLUSHINPROG);
653 if (np->n_flag & NFLUSHWANT) {
654 np->n_flag &= ~NFLUSHWANT;
655 wakeup(&np->n_flag);
656 }
657 return (error);
658 }
659