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/mount.h>
42 #include <sys/namei.h>
43 #include <sys/vnode.h>
44 #include <sys/dirent.h>
45 #include <sys/signalvar.h>
46 #include <sys/sysctl.h>
47
48 #include <vm/vm.h>
49 #include <vm/vm_page.h>
50 #include <vm/vm_extern.h>
51 #include <vm/vm_object.h>
52 #include <vm/vm_pager.h>
53 #include <vm/vnode_pager.h>
54 /*
55 #include <sys/ioccom.h>
56 */
57 #include <netsmb/smb.h>
58 #include <netsmb/smb_conn.h>
59 #include <netsmb/smb_subr.h>
60
61 #include <fs/smbfs/smbfs.h>
62 #include <fs/smbfs/smbfs_node.h>
63 #include <fs/smbfs/smbfs_subr.h>
64
65 #include <sys/buf.h>
66
67 /*#define SMBFS_RWGENERIC*/
68
69 extern int smbfs_pbuf_freecnt;
70
71 static int smbfs_fastlookup = 1;
72
73 extern struct linker_set sysctl_vfs_smbfs;
74
75 SYSCTL_DECL(_vfs_smbfs);
76 SYSCTL_INT(_vfs_smbfs, OID_AUTO, fastlookup, CTLFLAG_RW, &smbfs_fastlookup, 0, "");
77
78
79 #define DE_SIZE (sizeof(struct dirent))
80
81 static int
82 smbfs_readvdir(struct vnode *vp, struct uio *uio, struct ucred *cred)
83 {
84 struct dirent de;
85 struct componentname cn;
86 struct smb_cred scred;
87 struct smbfs_fctx *ctx;
88 struct vnode *newvp;
89 struct smbnode *np = VTOSMB(vp);
90 int error/*, *eofflag = ap->a_eofflag*/;
91 long offset, limit;
92
93 np = VTOSMB(vp);
94 SMBVDEBUG("dirname='%s'\n", np->n_name);
95 smb_makescred(&scred, uio->uio_procp, cred);
96 offset = uio->uio_offset / DE_SIZE; /* offset in the directory */
97 limit = uio->uio_resid / DE_SIZE;
98 if (uio->uio_resid < DE_SIZE || uio->uio_offset < 0)
99 return EINVAL;
100 while (limit && offset < 2) {
101 limit--;
102 bzero((caddr_t)&de, DE_SIZE);
103 de.d_reclen = DE_SIZE;
104 de.d_fileno = (offset == 0) ? np->n_ino :
105 (np->n_parent ? VTOSMB(np->n_parent)->n_ino : 2);
106 if (de.d_fileno == 0)
107 de.d_fileno = 0x7ffffffd + offset;
108 de.d_namlen = offset + 1;
109 de.d_name[0] = '.';
110 de.d_name[1] = '.';
111 de.d_name[offset + 1] = '\0';
112 de.d_type = DT_DIR;
113 error = uiomove((caddr_t)&de, DE_SIZE, uio);
114 if (error)
115 return error;
116 offset++;
117 uio->uio_offset += DE_SIZE;
118 }
119 if (limit == 0)
120 return 0;
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 return error;
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 return error == ENOENT ? 0 : error;
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_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 de.d_name[de.d_namlen] = '\0';
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((caddr_t)&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 return error;
177 }
178
179 int
180 smbfs_readvnode(struct vnode *vp, struct uio *uiop, struct ucred *cred)
181 {
182 struct smbmount *smp = VFSTOSMBFS(vp->v_mount);
183 struct smbnode *np = VTOSMB(vp);
184 struct proc *p;
185 struct vattr vattr;
186 struct smb_cred scred;
187 int error, lks;
188
189 /*
190 * Protect against method which is not supported for now
191 */
192 if (uiop->uio_segflg == UIO_NOCOPY)
193 return EOPNOTSUPP;
194
195 if (vp->v_type != VREG && vp->v_type != VDIR) {
196 SMBFSERR("vn types other than VREG or VDIR are unsupported !\n");
197 return EIO;
198 }
199 if (uiop->uio_resid == 0)
200 return 0;
201 if (uiop->uio_offset < 0)
202 return EINVAL;
203 /* if (uiop->uio_offset + uiop->uio_resid > smp->nm_maxfilesize)
204 return EFBIG;*/
205 p = uiop->uio_procp;
206 if (vp->v_type == VDIR) {
207 lks = LK_EXCLUSIVE;/*lockstatus(&vp->v_lock, p);*/
208 if (lks == LK_SHARED)
209 vn_lock(vp, LK_UPGRADE | LK_RETRY, p);
210 error = smbfs_readvdir(vp, uiop, cred);
211 if (lks == LK_SHARED)
212 vn_lock(vp, LK_DOWNGRADE | LK_RETRY, p);
213 return error;
214 }
215
216 /* biosize = SSTOCN(smp->sm_share)->sc_txmax;*/
217 if (np->n_flag & NMODIFIED) {
218 smbfs_attr_cacheremove(vp);
219 error = VOP_GETATTR(vp, &vattr, cred, p);
220 if (error)
221 return error;
222 np->n_mtime.tv_sec = vattr.va_mtime.tv_sec;
223 } else {
224 error = VOP_GETATTR(vp, &vattr, cred, p);
225 if (error)
226 return error;
227 if (np->n_mtime.tv_sec != vattr.va_mtime.tv_sec) {
228 error = smbfs_vinvalbuf(vp, V_SAVE, cred, p, 1);
229 if (error)
230 return error;
231 np->n_mtime.tv_sec = vattr.va_mtime.tv_sec;
232 }
233 }
234 smb_makescred(&scred, p, cred);
235 return smb_read(smp->sm_share, np->n_fid, uiop, &scred);
236 }
237
238 int
239 smbfs_writevnode(struct vnode *vp, struct uio *uiop,
240 struct ucred *cred, int ioflag)
241 {
242 struct smbmount *smp = VTOSMBFS(vp);
243 struct smbnode *np = VTOSMB(vp);
244 struct smb_cred scred;
245 struct proc *p;
246 int error = 0;
247
248 if (vp->v_type != VREG) {
249 SMBERROR("vn types other than VREG unsupported !\n");
250 return EIO;
251 }
252 SMBVDEBUG("ofs=%d,resid=%d\n",(int)uiop->uio_offset, uiop->uio_resid);
253 if (uiop->uio_offset < 0)
254 return EINVAL;
255 /* if (uiop->uio_offset + uiop->uio_resid > smp->nm_maxfilesize)
256 return (EFBIG);*/
257 p = uiop->uio_procp;
258 if (ioflag & (IO_APPEND | IO_SYNC)) {
259 if (np->n_flag & NMODIFIED) {
260 smbfs_attr_cacheremove(vp);
261 error = smbfs_vinvalbuf(vp, V_SAVE, cred, p, 1);
262 if (error)
263 return error;
264 }
265 if (ioflag & IO_APPEND) {
266 #if notyet
267 /*
268 * File size can be changed by another client
269 */
270 smbfs_attr_cacheremove(vp);
271 error = VOP_GETATTR(vp, &vattr, cred, p);
272 if (error) return (error);
273 #endif
274 uiop->uio_offset = np->n_size;
275 }
276 }
277 if (uiop->uio_resid == 0)
278 return 0;
279 if (p && uiop->uio_offset + uiop->uio_resid > p->p_rlimit[RLIMIT_FSIZE].rlim_cur) {
280 psignal(p, SIGXFSZ);
281 return EFBIG;
282 }
283 smb_makescred(&scred, p, 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 proc *p)
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_procp = p;
313
314 smb_makescred(&scred, p, cr);
315
316 if (bp->b_flags & B_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_flags |= B_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_flags |= B_ERROR;
385 bp->b_error = error;
386 }
387 bp->b_dirtyoff = bp->b_dirtyend = 0;
388 }
389 } else {
390 bp->b_resid = 0;
391 biodone(bp);
392 return 0;
393 }
394 }
395 bp->b_resid = uiop->uio_resid;
396 biodone(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 vnode_pager_generic_getpages(ap->a_vp, ap->a_m, ap->a_count,
416 ap->a_reqpage);
417 #else
418 int i, error, nextoff, size, toff, npages, count;
419 struct uio uio;
420 struct iovec iov;
421 vm_offset_t kva;
422 struct buf *bp;
423 struct vnode *vp;
424 struct proc *p;
425 struct ucred *cred;
426 struct smbmount *smp;
427 struct smbnode *np;
428 struct smb_cred scred;
429 vm_page_t *pages;
430
431 vp = ap->a_vp;
432 p = curproc; /* XXX */
433 cred = curproc->p_ucred; /* XXX */
434 np = VTOSMB(vp);
435 smp = VFSTOSMBFS(vp->v_mount);
436 pages = ap->a_m;
437 count = ap->a_count;
438
439 if (vp->v_object == NULL) {
440 printf("smbfs_getpages: called with non-merged cache vnode??\n");
441 return VM_PAGER_ERROR;
442 }
443 smb_makescred(&scred, p, cred);
444
445 bp = getpbuf(&smbfs_pbuf_freecnt);
446 npages = btoc(count);
447 kva = (vm_offset_t) bp->b_data;
448 pmap_qenter(kva, pages, npages);
449
450 iov.iov_base = (caddr_t) kva;
451 iov.iov_len = count;
452 uio.uio_iov = &iov;
453 uio.uio_iovcnt = 1;
454 uio.uio_offset = IDX_TO_OFF(pages[0]->pindex);
455 uio.uio_resid = count;
456 uio.uio_segflg = UIO_SYSSPACE;
457 uio.uio_rw = UIO_READ;
458 uio.uio_procp = p;
459
460 error = smb_read(smp->sm_share, np->n_fid, &uio, &scred);
461 pmap_qremove(kva, npages);
462
463 relpbuf(bp, &smbfs_pbuf_freecnt);
464
465 if (error && (uio.uio_resid == count)) {
466 printf("smbfs_getpages: error %d\n",error);
467 for (i = 0; i < npages; i++) {
468 if (ap->a_reqpage != i)
469 vnode_pager_freepage(pages[i]);
470 }
471 return VM_PAGER_ERROR;
472 }
473
474 size = count - uio.uio_resid;
475
476 for (i = 0, toff = 0; i < npages; i++, toff = nextoff) {
477 vm_page_t m;
478 nextoff = toff + PAGE_SIZE;
479 m = pages[i];
480
481 m->flags &= ~PG_ZERO;
482
483 if (nextoff <= size) {
484 m->valid = VM_PAGE_BITS_ALL;
485 m->dirty = 0;
486 } else {
487 int nvalid = ((size + DEV_BSIZE - 1) - toff) & ~(DEV_BSIZE - 1);
488 vm_page_set_validclean(m, 0, nvalid);
489 }
490
491 if (i != ap->a_reqpage) {
492 /*
493 * Whether or not to leave the page activated is up in
494 * the air, but we should put the page on a page queue
495 * somewhere (it already is in the object). Result:
496 * It appears that emperical results show that
497 * deactivating pages is best.
498 */
499
500 /*
501 * Just in case someone was asking for this page we
502 * now tell them that it is ok to use.
503 */
504 if (!error) {
505 if (m->flags & PG_WANTED)
506 vm_page_activate(m);
507 else
508 vm_page_deactivate(m);
509 vm_page_wakeup(m);
510 } else {
511 vnode_pager_freepage(m);
512 }
513 }
514 }
515 return 0;
516 #endif /* SMBFS_RWGENERIC */
517 }
518
519 /*
520 * Vnode op for VM putpages.
521 * possible bug: all IO done in sync mode
522 * Note that vop_close always invalidate pages before close, so it's
523 * not necessary to open vnode.
524 */
525 int
526 smbfs_putpages(ap)
527 struct vop_putpages_args /* {
528 struct vnode *a_vp;
529 vm_page_t *a_m;
530 int a_count;
531 int a_sync;
532 int *a_rtvals;
533 vm_ooffset_t a_offset;
534 } */ *ap;
535 {
536 int error;
537 struct vnode *vp = ap->a_vp;
538 struct proc *p;
539 struct ucred *cred;
540
541 #ifdef SMBFS_RWGENERIC
542 p = curproc; /* XXX */
543 cred = p->p_ucred; /* XXX */
544 VOP_OPEN(vp, FWRITE, cred, p);
545 error = vnode_pager_generic_putpages(ap->a_vp, ap->a_m, ap->a_count,
546 ap->a_sync, ap->a_rtvals);
547 VOP_CLOSE(vp, FWRITE, cred, p);
548 return error;
549 #else
550 struct uio uio;
551 struct iovec iov;
552 vm_offset_t kva;
553 struct buf *bp;
554 int i, npages, count;
555 int *rtvals;
556 struct smbmount *smp;
557 struct smbnode *np;
558 struct smb_cred scred;
559 vm_page_t *pages;
560
561 p = curproc; /* XXX */
562 cred = p->p_ucred; /* XXX */
563 /* VOP_OPEN(vp, FWRITE, cred, p);*/
564 np = VTOSMB(vp);
565 smp = VFSTOSMBFS(vp->v_mount);
566 pages = ap->a_m;
567 count = ap->a_count;
568 rtvals = ap->a_rtvals;
569 npages = btoc(count);
570
571 for (i = 0; i < npages; i++) {
572 rtvals[i] = VM_PAGER_AGAIN;
573 }
574
575 bp = getpbuf(&smbfs_pbuf_freecnt);
576 kva = (vm_offset_t) bp->b_data;
577 pmap_qenter(kva, pages, npages);
578
579 iov.iov_base = (caddr_t) kva;
580 iov.iov_len = count;
581 uio.uio_iov = &iov;
582 uio.uio_iovcnt = 1;
583 uio.uio_offset = IDX_TO_OFF(pages[0]->pindex);
584 uio.uio_resid = count;
585 uio.uio_segflg = UIO_SYSSPACE;
586 uio.uio_rw = UIO_WRITE;
587 uio.uio_procp = p;
588 SMBVDEBUG("ofs=%d,resid=%d\n",(int)uio.uio_offset, uio.uio_resid);
589
590 smb_makescred(&scred, p, cred);
591 error = smb_write(smp->sm_share, np->n_fid, &uio, &scred);
592 /* VOP_CLOSE(vp, FWRITE, cred, p);*/
593 SMBVDEBUG("paged write done: %d\n", error);
594
595 pmap_qremove(kva, npages);
596 relpbuf(bp, &smbfs_pbuf_freecnt);
597
598 if (!error) {
599 int nwritten = round_page(count - uio.uio_resid) / PAGE_SIZE;
600 for (i = 0; i < nwritten; i++) {
601 rtvals[i] = VM_PAGER_OK;
602 pages[i]->dirty = 0;
603 }
604 }
605 return rtvals[0];
606 #endif /* SMBFS_RWGENERIC */
607 }
608
609 /*
610 * Flush and invalidate all dirty buffers. If another process is already
611 * doing the flush, just wait for completion.
612 */
613 int
614 smbfs_vinvalbuf(vp, flags, cred, p, intrflg)
615 struct vnode *vp;
616 int flags;
617 struct ucred *cred;
618 struct proc *p;
619 int intrflg;
620 {
621 struct smbnode *np = VTOSMB(vp);
622 int error = 0, slpflag, slptimeo;
623
624 if (vp->v_flag & VXLOCK)
625 return 0;
626 if (intrflg) {
627 slpflag = PCATCH;
628 slptimeo = 2 * hz;
629 } else {
630 slpflag = 0;
631 slptimeo = 0;
632 }
633 while (np->n_flag & NFLUSHINPROG) {
634 np->n_flag |= NFLUSHWANT;
635 error = tsleep((caddr_t)&np->n_flag, PRIBIO + 2, "smfsvinv", slptimeo);
636 error = smb_proc_intr(p);
637 if (error == EINTR && intrflg)
638 return EINTR;
639 }
640 np->n_flag |= NFLUSHINPROG;
641 error = vinvalbuf(vp, flags, cred, p, slpflag, 0);
642 while (error) {
643 if (intrflg && (error == ERESTART || error == EINTR)) {
644 np->n_flag &= ~NFLUSHINPROG;
645 if (np->n_flag & NFLUSHWANT) {
646 np->n_flag &= ~NFLUSHWANT;
647 wakeup((caddr_t)&np->n_flag);
648 }
649 return EINTR;
650 }
651 error = vinvalbuf(vp, flags, cred, p, slpflag, 0);
652 }
653 np->n_flag &= ~(NMODIFIED | NFLUSHINPROG);
654 if (np->n_flag & NFLUSHWANT) {
655 np->n_flag &= ~NFLUSHWANT;
656 wakeup((caddr_t)&np->n_flag);
657 }
658 return (error);
659 }
Cache object: 1d6dc12c33348508ab5a2b3e0fad56a1
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