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 *
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24 * SUCH DAMAGE.
25 *
26 * $FreeBSD: releng/9.0/sys/fs/smbfs/smbfs_io.c 222586 2011-06-01 21:00:28Z kib $
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/signalvar.h>
40 #include <sys/sysctl.h>
41 #include <sys/vmmeter.h>
42
43 #include <vm/vm.h>
44 #include <vm/vm_page.h>
45 #include <vm/vm_extern.h>
46 #include <vm/vm_object.h>
47 #include <vm/vm_pager.h>
48 #include <vm/vnode_pager.h>
49 /*
50 #include <sys/ioccom.h>
51 */
52 #include <netsmb/smb.h>
53 #include <netsmb/smb_conn.h>
54 #include <netsmb/smb_subr.h>
55
56 #include <fs/smbfs/smbfs.h>
57 #include <fs/smbfs/smbfs_node.h>
58 #include <fs/smbfs/smbfs_subr.h>
59
60 /*#define SMBFS_RWGENERIC*/
61
62 extern int smbfs_pbuf_freecnt;
63
64 static int smbfs_fastlookup = 1;
65
66 SYSCTL_DECL(_vfs_smbfs);
67 SYSCTL_INT(_vfs_smbfs, OID_AUTO, fastlookup, CTLFLAG_RW, &smbfs_fastlookup, 0, "");
68
69
70 #define DE_SIZE (sizeof(struct dirent))
71
72 static int
73 smbfs_readvdir(struct vnode *vp, struct uio *uio, struct ucred *cred)
74 {
75 struct dirent de;
76 struct componentname cn;
77 struct smb_cred scred;
78 struct smbfs_fctx *ctx;
79 struct vnode *newvp;
80 struct smbnode *np = VTOSMB(vp);
81 int error/*, *eofflag = ap->a_eofflag*/;
82 long offset, limit;
83
84 np = VTOSMB(vp);
85 SMBVDEBUG("dirname='%s'\n", np->n_name);
86 smb_makescred(&scred, uio->uio_td, cred);
87 offset = uio->uio_offset / DE_SIZE; /* offset in the directory */
88 limit = uio->uio_resid / DE_SIZE;
89 if (uio->uio_resid < DE_SIZE || uio->uio_offset < 0)
90 return EINVAL;
91 while (limit && offset < 2) {
92 limit--;
93 bzero((caddr_t)&de, DE_SIZE);
94 de.d_reclen = DE_SIZE;
95 de.d_fileno = (offset == 0) ? np->n_ino :
96 (np->n_parent ? VTOSMB(np->n_parent)->n_ino : 2);
97 if (de.d_fileno == 0)
98 de.d_fileno = 0x7ffffffd + offset;
99 de.d_namlen = offset + 1;
100 de.d_name[0] = '.';
101 de.d_name[1] = '.';
102 de.d_name[offset + 1] = '\0';
103 de.d_type = DT_DIR;
104 error = uiomove(&de, DE_SIZE, uio);
105 if (error)
106 return error;
107 offset++;
108 uio->uio_offset += DE_SIZE;
109 }
110 if (limit == 0)
111 return 0;
112 if (offset != np->n_dirofs || np->n_dirseq == NULL) {
113 SMBVDEBUG("Reopening search %ld:%ld\n", offset, np->n_dirofs);
114 if (np->n_dirseq) {
115 smbfs_findclose(np->n_dirseq, &scred);
116 np->n_dirseq = NULL;
117 }
118 np->n_dirofs = 2;
119 error = smbfs_findopen(np, "*", 1,
120 SMB_FA_SYSTEM | SMB_FA_HIDDEN | SMB_FA_DIR,
121 &scred, &ctx);
122 if (error) {
123 SMBVDEBUG("can not open search, error = %d", error);
124 return error;
125 }
126 np->n_dirseq = ctx;
127 } else
128 ctx = np->n_dirseq;
129 while (np->n_dirofs < offset) {
130 error = smbfs_findnext(ctx, offset - np->n_dirofs++, &scred);
131 if (error) {
132 smbfs_findclose(np->n_dirseq, &scred);
133 np->n_dirseq = NULL;
134 return error == ENOENT ? 0 : error;
135 }
136 }
137 error = 0;
138 for (; limit; limit--, offset++) {
139 error = smbfs_findnext(ctx, limit, &scred);
140 if (error)
141 break;
142 np->n_dirofs++;
143 bzero((caddr_t)&de, DE_SIZE);
144 de.d_reclen = DE_SIZE;
145 de.d_fileno = ctx->f_attr.fa_ino;
146 de.d_type = (ctx->f_attr.fa_attr & SMB_FA_DIR) ? DT_DIR : DT_REG;
147 de.d_namlen = ctx->f_nmlen;
148 bcopy(ctx->f_name, de.d_name, de.d_namlen);
149 de.d_name[de.d_namlen] = '\0';
150 if (smbfs_fastlookup) {
151 error = smbfs_nget(vp->v_mount, vp, ctx->f_name,
152 ctx->f_nmlen, &ctx->f_attr, &newvp);
153 if (!error) {
154 cn.cn_nameptr = de.d_name;
155 cn.cn_namelen = de.d_namlen;
156 cache_enter(vp, newvp, &cn);
157 vput(newvp);
158 }
159 }
160 error = uiomove(&de, DE_SIZE, uio);
161 if (error)
162 break;
163 }
164 if (error == ENOENT)
165 error = 0;
166 uio->uio_offset = offset * DE_SIZE;
167 return error;
168 }
169
170 int
171 smbfs_readvnode(struct vnode *vp, struct uio *uiop, struct ucred *cred)
172 {
173 struct smbmount *smp = VFSTOSMBFS(vp->v_mount);
174 struct smbnode *np = VTOSMB(vp);
175 struct thread *td;
176 struct vattr vattr;
177 struct smb_cred scred;
178 int error, lks;
179
180 /*
181 * Protect against method which is not supported for now
182 */
183 if (uiop->uio_segflg == UIO_NOCOPY)
184 return EOPNOTSUPP;
185
186 if (vp->v_type != VREG && vp->v_type != VDIR) {
187 SMBFSERR("vn types other than VREG or VDIR are unsupported !\n");
188 return EIO;
189 }
190 if (uiop->uio_resid == 0)
191 return 0;
192 if (uiop->uio_offset < 0)
193 return EINVAL;
194 /* if (uiop->uio_offset + uiop->uio_resid > smp->nm_maxfilesize)
195 return EFBIG;*/
196 td = uiop->uio_td;
197 if (vp->v_type == VDIR) {
198 lks = LK_EXCLUSIVE; /* lockstatus(vp->v_vnlock); */
199 if (lks == LK_SHARED)
200 vn_lock(vp, LK_UPGRADE | LK_RETRY);
201 error = smbfs_readvdir(vp, uiop, cred);
202 if (lks == LK_SHARED)
203 vn_lock(vp, LK_DOWNGRADE | LK_RETRY);
204 return error;
205 }
206
207 /* biosize = SSTOCN(smp->sm_share)->sc_txmax;*/
208 if (np->n_flag & NMODIFIED) {
209 smbfs_attr_cacheremove(vp);
210 error = VOP_GETATTR(vp, &vattr, cred);
211 if (error)
212 return error;
213 np->n_mtime.tv_sec = vattr.va_mtime.tv_sec;
214 } else {
215 error = VOP_GETATTR(vp, &vattr, cred);
216 if (error)
217 return error;
218 if (np->n_mtime.tv_sec != vattr.va_mtime.tv_sec) {
219 error = smbfs_vinvalbuf(vp, td);
220 if (error)
221 return error;
222 np->n_mtime.tv_sec = vattr.va_mtime.tv_sec;
223 }
224 }
225 smb_makescred(&scred, td, cred);
226 return smb_read(smp->sm_share, np->n_fid, uiop, &scred);
227 }
228
229 int
230 smbfs_writevnode(struct vnode *vp, struct uio *uiop,
231 struct ucred *cred, int ioflag)
232 {
233 struct smbmount *smp = VTOSMBFS(vp);
234 struct smbnode *np = VTOSMB(vp);
235 struct smb_cred scred;
236 struct thread *td;
237 int error = 0;
238
239 if (vp->v_type != VREG) {
240 SMBERROR("vn types other than VREG unsupported !\n");
241 return EIO;
242 }
243 SMBVDEBUG("ofs=%d,resid=%d\n",(int)uiop->uio_offset, uiop->uio_resid);
244 if (uiop->uio_offset < 0)
245 return EINVAL;
246 /* if (uiop->uio_offset + uiop->uio_resid > smp->nm_maxfilesize)
247 return (EFBIG);*/
248 td = uiop->uio_td;
249 if (ioflag & (IO_APPEND | IO_SYNC)) {
250 if (np->n_flag & NMODIFIED) {
251 smbfs_attr_cacheremove(vp);
252 error = smbfs_vinvalbuf(vp, td);
253 if (error)
254 return error;
255 }
256 if (ioflag & IO_APPEND) {
257 #ifdef notyet
258 /*
259 * File size can be changed by another client
260 */
261 smbfs_attr_cacheremove(vp);
262 error = VOP_GETATTR(vp, &vattr, cred);
263 if (error) return (error);
264 #endif
265 uiop->uio_offset = np->n_size;
266 }
267 }
268 if (uiop->uio_resid == 0)
269 return 0;
270
271 if (vn_rlimit_fsize(vp, uiop, td))
272 return (EFBIG);
273
274 smb_makescred(&scred, td, cred);
275 error = smb_write(smp->sm_share, np->n_fid, uiop, &scred);
276 SMBVDEBUG("after: ofs=%d,resid=%d\n",(int)uiop->uio_offset, uiop->uio_resid);
277 if (!error) {
278 if (uiop->uio_offset > np->n_size) {
279 np->n_size = uiop->uio_offset;
280 vnode_pager_setsize(vp, np->n_size);
281 }
282 }
283 return error;
284 }
285
286 /*
287 * Do an I/O operation to/from a cache block.
288 */
289 int
290 smbfs_doio(struct vnode *vp, struct buf *bp, struct ucred *cr, struct thread *td)
291 {
292 struct smbmount *smp = VFSTOSMBFS(vp->v_mount);
293 struct smbnode *np = VTOSMB(vp);
294 struct uio uio, *uiop = &uio;
295 struct iovec io;
296 struct smb_cred scred;
297 int error = 0;
298
299 uiop->uio_iov = &io;
300 uiop->uio_iovcnt = 1;
301 uiop->uio_segflg = UIO_SYSSPACE;
302 uiop->uio_td = td;
303
304 smb_makescred(&scred, td, cr);
305
306 if (bp->b_iocmd == BIO_READ) {
307 io.iov_len = uiop->uio_resid = bp->b_bcount;
308 io.iov_base = bp->b_data;
309 uiop->uio_rw = UIO_READ;
310 switch (vp->v_type) {
311 case VREG:
312 uiop->uio_offset = ((off_t)bp->b_blkno) * DEV_BSIZE;
313 error = smb_read(smp->sm_share, np->n_fid, uiop, &scred);
314 if (error)
315 break;
316 if (uiop->uio_resid) {
317 int left = uiop->uio_resid;
318 int nread = bp->b_bcount - left;
319 if (left > 0)
320 bzero((char *)bp->b_data + nread, left);
321 }
322 break;
323 default:
324 printf("smbfs_doio: type %x unexpected\n",vp->v_type);
325 break;
326 };
327 if (error) {
328 bp->b_error = error;
329 bp->b_ioflags |= BIO_ERROR;
330 }
331 } else { /* write */
332 if (((bp->b_blkno * DEV_BSIZE) + bp->b_dirtyend) > np->n_size)
333 bp->b_dirtyend = np->n_size - (bp->b_blkno * DEV_BSIZE);
334
335 if (bp->b_dirtyend > bp->b_dirtyoff) {
336 io.iov_len = uiop->uio_resid = bp->b_dirtyend - bp->b_dirtyoff;
337 uiop->uio_offset = ((off_t)bp->b_blkno) * DEV_BSIZE + bp->b_dirtyoff;
338 io.iov_base = (char *)bp->b_data + bp->b_dirtyoff;
339 uiop->uio_rw = UIO_WRITE;
340 error = smb_write(smp->sm_share, np->n_fid, uiop, &scred);
341
342 /*
343 * For an interrupted write, the buffer is still valid
344 * and the write hasn't been pushed to the server yet,
345 * so we can't set BIO_ERROR and report the interruption
346 * by setting B_EINTR. For the B_ASYNC case, B_EINTR
347 * is not relevant, so the rpc attempt is essentially
348 * a noop. For the case of a V3 write rpc not being
349 * committed to stable storage, the block is still
350 * dirty and requires either a commit rpc or another
351 * write rpc with iomode == NFSV3WRITE_FILESYNC before
352 * the block is reused. This is indicated by setting
353 * the B_DELWRI and B_NEEDCOMMIT flags.
354 */
355 if (error == EINTR
356 || (!error && (bp->b_flags & B_NEEDCOMMIT))) {
357 int s;
358
359 s = splbio();
360 bp->b_flags &= ~(B_INVAL|B_NOCACHE);
361 if ((bp->b_flags & B_ASYNC) == 0)
362 bp->b_flags |= B_EINTR;
363 if ((bp->b_flags & B_PAGING) == 0) {
364 bdirty(bp);
365 bp->b_flags &= ~B_DONE;
366 }
367 if ((bp->b_flags & B_ASYNC) == 0)
368 bp->b_flags |= B_EINTR;
369 splx(s);
370 } else {
371 if (error) {
372 bp->b_ioflags |= BIO_ERROR;
373 bp->b_error = error;
374 }
375 bp->b_dirtyoff = bp->b_dirtyend = 0;
376 }
377 } else {
378 bp->b_resid = 0;
379 bufdone(bp);
380 return 0;
381 }
382 }
383 bp->b_resid = uiop->uio_resid;
384 bufdone(bp);
385 return error;
386 }
387
388 /*
389 * Vnode op for VM getpages.
390 * Wish wish .... get rid from multiple IO routines
391 */
392 int
393 smbfs_getpages(ap)
394 struct vop_getpages_args /* {
395 struct vnode *a_vp;
396 vm_page_t *a_m;
397 int a_count;
398 int a_reqpage;
399 vm_ooffset_t a_offset;
400 } */ *ap;
401 {
402 #ifdef SMBFS_RWGENERIC
403 return vop_stdgetpages(ap);
404 #else
405 int i, error, nextoff, size, toff, npages, count, reqpage;
406 struct uio uio;
407 struct iovec iov;
408 vm_offset_t kva;
409 struct buf *bp;
410 struct vnode *vp;
411 struct thread *td;
412 struct ucred *cred;
413 struct smbmount *smp;
414 struct smbnode *np;
415 struct smb_cred scred;
416 vm_object_t object;
417 vm_page_t *pages, m;
418
419 vp = ap->a_vp;
420 if ((object = vp->v_object) == NULL) {
421 printf("smbfs_getpages: called with non-merged cache vnode??\n");
422 return VM_PAGER_ERROR;
423 }
424
425 td = curthread; /* XXX */
426 cred = td->td_ucred; /* XXX */
427 np = VTOSMB(vp);
428 smp = VFSTOSMBFS(vp->v_mount);
429 pages = ap->a_m;
430 count = ap->a_count;
431 npages = btoc(count);
432 reqpage = ap->a_reqpage;
433
434 /*
435 * If the requested page is partially valid, just return it and
436 * allow the pager to zero-out the blanks. Partially valid pages
437 * can only occur at the file EOF.
438 */
439 m = pages[reqpage];
440
441 VM_OBJECT_LOCK(object);
442 if (m->valid != 0) {
443 for (i = 0; i < npages; ++i) {
444 if (i != reqpage) {
445 vm_page_lock(pages[i]);
446 vm_page_free(pages[i]);
447 vm_page_unlock(pages[i]);
448 }
449 }
450 VM_OBJECT_UNLOCK(object);
451 return 0;
452 }
453 VM_OBJECT_UNLOCK(object);
454
455 smb_makescred(&scred, td, cred);
456
457 bp = getpbuf(&smbfs_pbuf_freecnt);
458
459 kva = (vm_offset_t) bp->b_data;
460 pmap_qenter(kva, pages, npages);
461 PCPU_INC(cnt.v_vnodein);
462 PCPU_ADD(cnt.v_vnodepgsin, npages);
463
464 iov.iov_base = (caddr_t) kva;
465 iov.iov_len = count;
466 uio.uio_iov = &iov;
467 uio.uio_iovcnt = 1;
468 uio.uio_offset = IDX_TO_OFF(pages[0]->pindex);
469 uio.uio_resid = count;
470 uio.uio_segflg = UIO_SYSSPACE;
471 uio.uio_rw = UIO_READ;
472 uio.uio_td = td;
473
474 error = smb_read(smp->sm_share, np->n_fid, &uio, &scred);
475 pmap_qremove(kva, npages);
476
477 relpbuf(bp, &smbfs_pbuf_freecnt);
478
479 VM_OBJECT_LOCK(object);
480 if (error && (uio.uio_resid == count)) {
481 printf("smbfs_getpages: error %d\n",error);
482 for (i = 0; i < npages; i++) {
483 if (reqpage != i) {
484 vm_page_lock(pages[i]);
485 vm_page_free(pages[i]);
486 vm_page_unlock(pages[i]);
487 }
488 }
489 VM_OBJECT_UNLOCK(object);
490 return VM_PAGER_ERROR;
491 }
492
493 size = count - uio.uio_resid;
494
495 for (i = 0, toff = 0; i < npages; i++, toff = nextoff) {
496 vm_page_t m;
497 nextoff = toff + PAGE_SIZE;
498 m = pages[i];
499
500 if (nextoff <= size) {
501 /*
502 * Read operation filled an entire page
503 */
504 m->valid = VM_PAGE_BITS_ALL;
505 KASSERT(m->dirty == 0,
506 ("smbfs_getpages: page %p is dirty", m));
507 } else if (size > toff) {
508 /*
509 * Read operation filled a partial page.
510 */
511 m->valid = 0;
512 vm_page_set_valid(m, 0, size - toff);
513 KASSERT(m->dirty == 0,
514 ("smbfs_getpages: page %p is dirty", m));
515 } else {
516 /*
517 * Read operation was short. If no error occured
518 * we may have hit a zero-fill section. We simply
519 * leave valid set to 0.
520 */
521 ;
522 }
523
524 if (i != reqpage) {
525 /*
526 * Whether or not to leave the page activated is up in
527 * the air, but we should put the page on a page queue
528 * somewhere (it already is in the object). Result:
529 * It appears that emperical results show that
530 * deactivating pages is best.
531 */
532
533 /*
534 * Just in case someone was asking for this page we
535 * now tell them that it is ok to use.
536 */
537 if (!error) {
538 if (m->oflags & VPO_WANTED) {
539 vm_page_lock(m);
540 vm_page_activate(m);
541 vm_page_unlock(m);
542 } else {
543 vm_page_lock(m);
544 vm_page_deactivate(m);
545 vm_page_unlock(m);
546 }
547 vm_page_wakeup(m);
548 } else {
549 vm_page_lock(m);
550 vm_page_free(m);
551 vm_page_unlock(m);
552 }
553 }
554 }
555 VM_OBJECT_UNLOCK(object);
556 return 0;
557 #endif /* SMBFS_RWGENERIC */
558 }
559
560 /*
561 * Vnode op for VM putpages.
562 * possible bug: all IO done in sync mode
563 * Note that vop_close always invalidate pages before close, so it's
564 * not necessary to open vnode.
565 */
566 int
567 smbfs_putpages(ap)
568 struct vop_putpages_args /* {
569 struct vnode *a_vp;
570 vm_page_t *a_m;
571 int a_count;
572 int a_sync;
573 int *a_rtvals;
574 vm_ooffset_t a_offset;
575 } */ *ap;
576 {
577 int error;
578 struct vnode *vp = ap->a_vp;
579 struct thread *td;
580 struct ucred *cred;
581
582 #ifdef SMBFS_RWGENERIC
583 td = curthread; /* XXX */
584 cred = td->td_ucred; /* XXX */
585 VOP_OPEN(vp, FWRITE, cred, td, NULL);
586 error = vop_stdputpages(ap);
587 VOP_CLOSE(vp, FWRITE, cred, td);
588 return error;
589 #else
590 struct uio uio;
591 struct iovec iov;
592 vm_offset_t kva;
593 struct buf *bp;
594 int i, npages, count;
595 int *rtvals;
596 struct smbmount *smp;
597 struct smbnode *np;
598 struct smb_cred scred;
599 vm_page_t *pages;
600
601 td = curthread; /* XXX */
602 cred = td->td_ucred; /* XXX */
603 /* VOP_OPEN(vp, FWRITE, cred, td, NULL);*/
604 np = VTOSMB(vp);
605 smp = VFSTOSMBFS(vp->v_mount);
606 pages = ap->a_m;
607 count = ap->a_count;
608 rtvals = ap->a_rtvals;
609 npages = btoc(count);
610
611 for (i = 0; i < npages; i++) {
612 rtvals[i] = VM_PAGER_ERROR;
613 }
614
615 bp = getpbuf(&smbfs_pbuf_freecnt);
616
617 kva = (vm_offset_t) bp->b_data;
618 pmap_qenter(kva, pages, npages);
619 PCPU_INC(cnt.v_vnodeout);
620 PCPU_ADD(cnt.v_vnodepgsout, count);
621
622 iov.iov_base = (caddr_t) kva;
623 iov.iov_len = count;
624 uio.uio_iov = &iov;
625 uio.uio_iovcnt = 1;
626 uio.uio_offset = IDX_TO_OFF(pages[0]->pindex);
627 uio.uio_resid = count;
628 uio.uio_segflg = UIO_SYSSPACE;
629 uio.uio_rw = UIO_WRITE;
630 uio.uio_td = td;
631 SMBVDEBUG("ofs=%d,resid=%d\n",(int)uio.uio_offset, uio.uio_resid);
632
633 smb_makescred(&scred, td, cred);
634 error = smb_write(smp->sm_share, np->n_fid, &uio, &scred);
635 /* VOP_CLOSE(vp, FWRITE, cred, td);*/
636 SMBVDEBUG("paged write done: %d\n", error);
637
638 pmap_qremove(kva, npages);
639
640 relpbuf(bp, &smbfs_pbuf_freecnt);
641
642 if (!error)
643 vnode_pager_undirty_pages(pages, rtvals, count - uio.uio_resid);
644 return rtvals[0];
645 #endif /* SMBFS_RWGENERIC */
646 }
647
648 /*
649 * Flush and invalidate all dirty buffers. If another process is already
650 * doing the flush, just wait for completion.
651 */
652 int
653 smbfs_vinvalbuf(struct vnode *vp, struct thread *td)
654 {
655 struct smbnode *np = VTOSMB(vp);
656 int error = 0;
657
658 if (vp->v_iflag & VI_DOOMED)
659 return 0;
660
661 while (np->n_flag & NFLUSHINPROG) {
662 np->n_flag |= NFLUSHWANT;
663 error = tsleep(&np->n_flag, PRIBIO + 2, "smfsvinv", 2 * hz);
664 error = smb_td_intr(td);
665 if (error == EINTR)
666 return EINTR;
667 }
668 np->n_flag |= NFLUSHINPROG;
669
670 if (vp->v_bufobj.bo_object != NULL) {
671 VM_OBJECT_LOCK(vp->v_bufobj.bo_object);
672 vm_object_page_clean(vp->v_bufobj.bo_object, 0, 0, OBJPC_SYNC);
673 VM_OBJECT_UNLOCK(vp->v_bufobj.bo_object);
674 }
675
676 error = vinvalbuf(vp, V_SAVE, PCATCH, 0);
677 while (error) {
678 if (error == ERESTART || error == EINTR) {
679 np->n_flag &= ~NFLUSHINPROG;
680 if (np->n_flag & NFLUSHWANT) {
681 np->n_flag &= ~NFLUSHWANT;
682 wakeup(&np->n_flag);
683 }
684 return EINTR;
685 }
686 error = vinvalbuf(vp, V_SAVE, PCATCH, 0);
687 }
688 np->n_flag &= ~(NMODIFIED | NFLUSHINPROG);
689 if (np->n_flag & NFLUSHWANT) {
690 np->n_flag &= ~NFLUSHWANT;
691 wakeup(&np->n_flag);
692 }
693 return (error);
694 }
Cache object: 37e83d3869e6d77b5d3ec3298c9a5cf0
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