[CIFS] Performance improvement, finish up adding CIFSSMBWrite2
[linux-2.6.git] / fs / cifs / cifs_debug.c
1 /*
2  *   fs/cifs_debug.c
3  *
4  *   Copyright (C) International Business Machines  Corp., 2000,2005
5  *
6  *   Modified by Steve French (sfrench@us.ibm.com)
7  *
8  *   This program is free software;  you can redistribute it and/or modify
9  *   it under the terms of the GNU General Public License as published by
10  *   the Free Software Foundation; either version 2 of the License, or 
11  *   (at your option) any later version.
12  * 
13  *   This program is distributed in the hope that it will be useful,
14  *   but WITHOUT ANY WARRANTY;  without even the implied warranty of
15  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See
16  *   the GNU General Public License for more details.
17  *
18  *   You should have received a copy of the GNU General Public License
19  *   along with this program;  if not, write to the Free Software 
20  *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
21  */
22 #include <linux/fs.h>
23 #include <linux/string.h>
24 #include <linux/ctype.h>
25 #include <linux/module.h>
26 #include <linux/proc_fs.h>
27 #include <asm/uaccess.h>
28 #include "cifspdu.h"
29 #include "cifsglob.h"
30 #include "cifsproto.h"
31 #include "cifs_debug.h"
32 #include "cifsfs.h"
33
34 void
35 cifs_dump_mem(char *label, void *data, int length)
36 {
37         int i, j;
38         int *intptr = data;
39         char *charptr = data;
40         char buf[10], line[80];
41
42         printk(KERN_DEBUG "%s: dump of %d bytes of data at 0x%p\n\n", 
43                 label, length, data);
44         for (i = 0; i < length; i += 16) {
45                 line[0] = 0;
46                 for (j = 0; (j < 4) && (i + j * 4 < length); j++) {
47                         sprintf(buf, " %08x", intptr[i / 4 + j]);
48                         strcat(line, buf);
49                 }
50                 buf[0] = ' ';
51                 buf[2] = 0;
52                 for (j = 0; (j < 16) && (i + j < length); j++) {
53                         buf[1] = isprint(charptr[i + j]) ? charptr[i + j] : '.';
54                         strcat(line, buf);
55                 }
56                 printk(KERN_DEBUG "%s\n", line);
57         }
58 }
59
60 #ifdef CONFIG_PROC_FS
61 static int
62 cifs_debug_data_read(char *buf, char **beginBuffer, off_t offset,
63                      int count, int *eof, void *data)
64 {
65         struct list_head *tmp;
66         struct list_head *tmp1;
67         struct mid_q_entry * mid_entry;
68         struct cifsSesInfo *ses;
69         struct cifsTconInfo *tcon;
70         int i;
71         int length = 0;
72         char * original_buf = buf;
73
74         *beginBuffer = buf + offset;
75
76         
77         length =
78             sprintf(buf,
79                     "Display Internal CIFS Data Structures for Debugging\n"
80                     "---------------------------------------------------\n");
81         buf += length;
82         length = sprintf(buf,"CIFS Version %s\n",CIFS_VERSION);
83         buf += length;
84         length = sprintf(buf, "Servers:");
85         buf += length;
86
87         i = 0;
88         read_lock(&GlobalSMBSeslock);
89         list_for_each(tmp, &GlobalSMBSessionList) {
90                 i++;
91                 ses = list_entry(tmp, struct cifsSesInfo, cifsSessionList);
92                 if((ses->serverDomain == NULL) || (ses->serverOS == NULL) ||
93                    (ses->serverNOS == NULL)) {
94                         buf += sprintf("\nentry for %s not fully displayed\n\t",
95                                         ses->serverName);
96                         
97                 } else {
98                         length =
99                             sprintf(buf,
100                                     "\n%d) Name: %s  Domain: %s Mounts: %d ServerOS: %s  \n\tServerNOS: %s\tCapabilities: 0x%x\n\tSMB session status: %d\t",
101                                 i, ses->serverName, ses->serverDomain,
102                                 atomic_read(&ses->inUse),
103                                 ses->serverOS, ses->serverNOS,
104                                 ses->capabilities,ses->status);
105                         buf += length;
106                 }
107                 if(ses->server) {
108                         buf += sprintf(buf, "TCP status: %d\n\tLocal Users To Server: %d SecMode: 0x%x Req Active: %d",
109                                 ses->server->tcpStatus,
110                                 atomic_read(&ses->server->socketUseCount),
111                                 ses->server->secMode,
112                                 atomic_read(&ses->server->inFlight));
113                         
114                         length = sprintf(buf, "\nMIDs:\n");
115                         buf += length;
116
117                         spin_lock(&GlobalMid_Lock);
118                         list_for_each(tmp1, &ses->server->pending_mid_q) {
119                                 mid_entry = list_entry(tmp1, struct
120                                         mid_q_entry,
121                                         qhead);
122                                 if(mid_entry) {
123                                         length = sprintf(buf,"State: %d com: %d pid: %d tsk: %p mid %d\n",
124                                                 mid_entry->midState,
125                                                 (int)mid_entry->command,
126                                                 mid_entry->pid,
127                                                 mid_entry->tsk,
128                                                 mid_entry->mid);
129                                         buf += length;
130                                 }
131                         }
132                         spin_unlock(&GlobalMid_Lock); 
133                 }
134
135         }
136         read_unlock(&GlobalSMBSeslock);
137         sprintf(buf, "\n");
138         buf++;
139
140         length = sprintf(buf, "Shares:");
141         buf += length;
142
143         i = 0;
144         read_lock(&GlobalSMBSeslock);
145         list_for_each(tmp, &GlobalTreeConnectionList) {
146                 __u32 dev_type;
147                 i++;
148                 tcon = list_entry(tmp, struct cifsTconInfo, cifsConnectionList);
149                 dev_type = le32_to_cpu(tcon->fsDevInfo.DeviceType);
150                 length =
151                     sprintf(buf,
152                             "\n%d) %s Uses: %d Type: %s Characteristics: 0x%x Attributes: 0x%x\nPathComponentMax: %d Status: %d",
153                             i, tcon->treeName,
154                             atomic_read(&tcon->useCount),
155                             tcon->nativeFileSystem,
156                             le32_to_cpu(tcon->fsDevInfo.DeviceCharacteristics),
157                             le32_to_cpu(tcon->fsAttrInfo.Attributes),
158                             le32_to_cpu(tcon->fsAttrInfo.MaxPathNameComponentLength),
159                             tcon->tidStatus);
160                 buf += length;        
161                 if (dev_type == FILE_DEVICE_DISK)
162                         length = sprintf(buf, " type: DISK ");
163                 else if (dev_type == FILE_DEVICE_CD_ROM)
164                         length = sprintf(buf, " type: CDROM ");
165                 else
166                         length =
167                             sprintf(buf, " type: %d ", dev_type);
168                 buf += length;
169                 if(tcon->tidStatus == CifsNeedReconnect) {
170                         buf += sprintf(buf, "\tDISCONNECTED ");
171                         length += 14;
172                 }
173         }
174         read_unlock(&GlobalSMBSeslock);
175
176         length = sprintf(buf, "\n");
177         buf += length;
178
179         /* BB add code to dump additional info such as TCP session info now */
180         /* Now calculate total size of returned data */
181         length = buf - original_buf;
182
183         if(offset + count >= length)
184                 *eof = 1;
185         if(length < offset) {
186                 *eof = 1;
187                 return 0;
188         } else {
189                 length = length - offset;
190         }
191         if (length > count)
192                 length = count;
193
194         return length;
195 }
196
197 #ifdef CONFIG_CIFS_STATS
198 static int
199 cifs_stats_read(char *buf, char **beginBuffer, off_t offset,
200                   int count, int *eof, void *data)
201 {
202         int item_length,i,length;
203         struct list_head *tmp;
204         struct cifsTconInfo *tcon;
205
206         *beginBuffer = buf + offset;
207
208         length = sprintf(buf,
209                         "Resources in use\nCIFS Session: %d\n",
210                         sesInfoAllocCount.counter);
211         buf += length;
212         item_length = 
213                 sprintf(buf,"Share (unique mount targets): %d\n",
214                         tconInfoAllocCount.counter);
215         length += item_length;
216         buf += item_length;      
217         item_length = 
218                 sprintf(buf,"SMB Request/Response Buffer: %d Pool size: %d\n",
219                         bufAllocCount.counter,
220                         cifs_min_rcv + tcpSesAllocCount.counter);
221         length += item_length;
222         buf += item_length;
223         item_length = 
224                 sprintf(buf,"SMB Small Req/Resp Buffer: %d Pool size: %d\n",
225                         smBufAllocCount.counter,cifs_min_small);
226         length += item_length;
227         buf += item_length;
228         item_length = 
229                 sprintf(buf,"Operations (MIDs): %d\n",
230                         midCount.counter);
231         length += item_length;
232         buf += item_length;
233         item_length = sprintf(buf,
234                 "\n%d session %d share reconnects\n",
235                 tcpSesReconnectCount.counter,tconInfoReconnectCount.counter);
236         length += item_length;
237         buf += item_length;
238
239         item_length = sprintf(buf,
240                 "Total vfs operations: %d maximum at one time: %d\n",
241                 GlobalCurrentXid,GlobalMaxActiveXid);
242         length += item_length;
243         buf += item_length;
244
245         i = 0;
246         read_lock(&GlobalSMBSeslock);
247         list_for_each(tmp, &GlobalTreeConnectionList) {
248                 i++;
249                 tcon = list_entry(tmp, struct cifsTconInfo, cifsConnectionList);
250                 item_length = sprintf(buf,"\n%d) %s",i, tcon->treeName);
251                 buf += item_length;
252                 length += item_length;
253                 if(tcon->tidStatus == CifsNeedReconnect) {
254                         buf += sprintf(buf, "\tDISCONNECTED ");
255                         length += 14;
256                 }
257                 item_length = sprintf(buf,"\nSMBs: %d Oplock Breaks: %d",
258                         atomic_read(&tcon->num_smbs_sent),
259                         atomic_read(&tcon->num_oplock_brks));
260                 buf += item_length;
261                 length += item_length;
262                 item_length = sprintf(buf,"\nReads: %d Bytes %lld",
263                         atomic_read(&tcon->num_reads),
264                         (long long)(tcon->bytes_read));
265                 buf += item_length;
266                 length += item_length;
267                 item_length = sprintf(buf,"\nWrites: %d Bytes: %lld",
268                         atomic_read(&tcon->num_writes),
269                         (long long)(tcon->bytes_written));
270                 buf += item_length;
271                 length += item_length;
272                 item_length = sprintf(buf,
273                         "\nOpens: %d Deletes: %d\nMkdirs: %d Rmdirs: %d",
274                         atomic_read(&tcon->num_opens),
275                         atomic_read(&tcon->num_deletes),
276                         atomic_read(&tcon->num_mkdirs),
277                         atomic_read(&tcon->num_rmdirs));
278                 buf += item_length;
279                 length += item_length;
280                 item_length = sprintf(buf,
281                         "\nRenames: %d T2 Renames %d",
282                         atomic_read(&tcon->num_renames),
283                         atomic_read(&tcon->num_t2renames));
284                 buf += item_length;
285                 length += item_length;
286                 item_length = sprintf(buf,"\nFindFirst: %d FNext %d FClose %d",
287                         atomic_read(&tcon->num_ffirst),
288                         atomic_read(&tcon->num_fnext),
289                         atomic_read(&tcon->num_fclose));
290                 buf += item_length;
291                 length += item_length;
292         }
293         read_unlock(&GlobalSMBSeslock);
294
295         buf += sprintf(buf,"\n");
296         length++;
297
298         if(offset + count >= length)
299                 *eof = 1;
300         if(length < offset) {
301                 *eof = 1;
302                 return 0;
303         } else {
304                 length = length - offset;
305         }
306         if (length > count)
307                 length = count;
308                 
309         return length;
310 }
311 #endif
312
313 static struct proc_dir_entry *proc_fs_cifs;
314 read_proc_t cifs_txanchor_read;
315 static read_proc_t cifsFYI_read;
316 static write_proc_t cifsFYI_write;
317 static read_proc_t oplockEnabled_read;
318 static write_proc_t oplockEnabled_write;
319 static read_proc_t lookupFlag_read;
320 static write_proc_t lookupFlag_write;
321 static read_proc_t traceSMB_read;
322 static write_proc_t traceSMB_write;
323 static read_proc_t multiuser_mount_read;
324 static write_proc_t multiuser_mount_write;
325 static read_proc_t extended_security_read;
326 static write_proc_t extended_security_write;
327 static read_proc_t ntlmv2_enabled_read;
328 static write_proc_t ntlmv2_enabled_write;
329 static read_proc_t packet_signing_enabled_read;
330 static write_proc_t packet_signing_enabled_write;
331 static read_proc_t quotaEnabled_read;
332 static write_proc_t quotaEnabled_write;
333 static read_proc_t linuxExtensionsEnabled_read;
334 static write_proc_t linuxExtensionsEnabled_write;
335
336 void
337 cifs_proc_init(void)
338 {
339         struct proc_dir_entry *pde;
340
341         proc_fs_cifs = proc_mkdir("cifs", proc_root_fs);
342         if (proc_fs_cifs == NULL)
343                 return;
344
345         proc_fs_cifs->owner = THIS_MODULE;
346         create_proc_read_entry("DebugData", 0, proc_fs_cifs,
347                                 cifs_debug_data_read, NULL);
348
349 #ifdef CONFIG_CIFS_STATS
350         create_proc_read_entry("Stats", 0, proc_fs_cifs,
351                                 cifs_stats_read, NULL);
352 #endif
353         pde = create_proc_read_entry("cifsFYI", 0, proc_fs_cifs,
354                                 cifsFYI_read, NULL);
355         if (pde)
356                 pde->write_proc = cifsFYI_write;
357
358         pde =
359             create_proc_read_entry("traceSMB", 0, proc_fs_cifs,
360                                 traceSMB_read, NULL);
361         if (pde)
362                 pde->write_proc = traceSMB_write;
363
364         pde = create_proc_read_entry("OplockEnabled", 0, proc_fs_cifs,
365                                 oplockEnabled_read, NULL);
366         if (pde)
367                 pde->write_proc = oplockEnabled_write;
368
369         pde = create_proc_read_entry("Experimental", 0, proc_fs_cifs,
370                                 quotaEnabled_read, NULL);
371         if (pde)
372                 pde->write_proc = quotaEnabled_write;
373
374         pde = create_proc_read_entry("LinuxExtensionsEnabled", 0, proc_fs_cifs,
375                                 linuxExtensionsEnabled_read, NULL);
376         if (pde)
377                 pde->write_proc = linuxExtensionsEnabled_write;
378
379         pde =
380             create_proc_read_entry("MultiuserMount", 0, proc_fs_cifs,
381                                 multiuser_mount_read, NULL);
382         if (pde)
383                 pde->write_proc = multiuser_mount_write;
384
385         pde =
386             create_proc_read_entry("ExtendedSecurity", 0, proc_fs_cifs,
387                                 extended_security_read, NULL);
388         if (pde)
389                 pde->write_proc = extended_security_write;
390
391         pde =
392         create_proc_read_entry("LookupCacheEnabled", 0, proc_fs_cifs,
393                                 lookupFlag_read, NULL);
394         if (pde)
395                 pde->write_proc = lookupFlag_write;
396
397         pde =
398             create_proc_read_entry("NTLMV2Enabled", 0, proc_fs_cifs,
399                                 ntlmv2_enabled_read, NULL);
400         if (pde)
401                 pde->write_proc = ntlmv2_enabled_write;
402
403         pde =
404             create_proc_read_entry("PacketSigningEnabled", 0, proc_fs_cifs,
405                                 packet_signing_enabled_read, NULL);
406         if (pde)
407                 pde->write_proc = packet_signing_enabled_write;
408 }
409
410 void
411 cifs_proc_clean(void)
412 {
413         if (proc_fs_cifs == NULL)
414                 return;
415
416         remove_proc_entry("DebugData", proc_fs_cifs);
417         remove_proc_entry("cifsFYI", proc_fs_cifs);
418         remove_proc_entry("traceSMB", proc_fs_cifs);
419 #ifdef CONFIG_CIFS_STATS
420         remove_proc_entry("Stats", proc_fs_cifs);
421 #endif
422         remove_proc_entry("MultiuserMount", proc_fs_cifs);
423         remove_proc_entry("OplockEnabled", proc_fs_cifs);
424         remove_proc_entry("NTLMV2Enabled",proc_fs_cifs);
425         remove_proc_entry("ExtendedSecurity",proc_fs_cifs);
426         remove_proc_entry("PacketSigningEnabled",proc_fs_cifs);
427         remove_proc_entry("LinuxExtensionsEnabled",proc_fs_cifs);
428         remove_proc_entry("Experimental",proc_fs_cifs);
429         remove_proc_entry("LookupCacheEnabled",proc_fs_cifs);
430         remove_proc_entry("cifs", proc_root_fs);
431 }
432
433 static int
434 cifsFYI_read(char *page, char **start, off_t off, int count,
435              int *eof, void *data)
436 {
437         int len;
438
439         len = sprintf(page, "%d\n", cifsFYI);
440
441         len -= off;
442         *start = page + off;
443
444         if (len > count)
445                 len = count;
446         else
447                 *eof = 1;
448
449         if (len < 0)
450                 len = 0;
451
452         return len;
453 }
454 static int
455 cifsFYI_write(struct file *file, const char __user *buffer,
456               unsigned long count, void *data)
457 {
458         char c;
459         int rc;
460
461         rc = get_user(c, buffer);
462         if (rc)
463                 return rc;
464         if (c == '0' || c == 'n' || c == 'N')
465                 cifsFYI = 0;
466         else if (c == '1' || c == 'y' || c == 'Y')
467                 cifsFYI = 1;
468
469         return count;
470 }
471
472 static int
473 oplockEnabled_read(char *page, char **start, off_t off,
474                    int count, int *eof, void *data)
475 {
476         int len;
477
478         len = sprintf(page, "%d\n", oplockEnabled);
479
480         len -= off;
481         *start = page + off;
482
483         if (len > count)
484                 len = count;
485         else
486                 *eof = 1;
487
488         if (len < 0)
489                 len = 0;
490
491         return len;
492 }
493 static int
494 oplockEnabled_write(struct file *file, const char __user *buffer,
495                     unsigned long count, void *data)
496 {
497         char c;
498         int rc;
499
500         rc = get_user(c, buffer);
501         if (rc)
502                 return rc;
503         if (c == '0' || c == 'n' || c == 'N')
504                 oplockEnabled = 0;
505         else if (c == '1' || c == 'y' || c == 'Y')
506                 oplockEnabled = 1;
507
508         return count;
509 }
510
511 static int
512 quotaEnabled_read(char *page, char **start, off_t off,
513                    int count, int *eof, void *data)
514 {
515         int len;
516
517         len = sprintf(page, "%d\n", experimEnabled);
518 /* could also check if quotas are enabled in kernel
519         as a whole first */
520         len -= off;
521         *start = page + off;
522
523         if (len > count)
524                 len = count;
525         else
526                 *eof = 1;
527
528         if (len < 0)
529                 len = 0;
530
531         return len;
532 }
533 static int
534 quotaEnabled_write(struct file *file, const char __user *buffer,
535                     unsigned long count, void *data)
536 {
537         char c;
538         int rc;
539
540         rc = get_user(c, buffer);
541         if (rc)
542                 return rc;
543         if (c == '0' || c == 'n' || c == 'N')
544                 experimEnabled = 0;
545         else if (c == '1' || c == 'y' || c == 'Y')
546                 experimEnabled = 1;
547
548         return count;
549 }
550
551 static int
552 linuxExtensionsEnabled_read(char *page, char **start, off_t off,
553                    int count, int *eof, void *data)
554 {
555         int len;
556
557         len = sprintf(page, "%d\n", linuxExtEnabled);
558 /* could also check if quotas are enabled in kernel
559         as a whole first */
560         len -= off;
561         *start = page + off;
562
563         if (len > count)
564                 len = count;
565         else
566                 *eof = 1;
567
568         if (len < 0)
569                 len = 0;
570
571         return len;
572 }
573 static int
574 linuxExtensionsEnabled_write(struct file *file, const char __user *buffer,
575                     unsigned long count, void *data)
576 {
577         char c;
578         int rc;
579
580         rc = get_user(c, buffer);
581         if (rc)
582                 return rc;
583         if (c == '0' || c == 'n' || c == 'N')
584                 linuxExtEnabled = 0;
585         else if (c == '1' || c == 'y' || c == 'Y')
586                 linuxExtEnabled = 1;
587
588         return count;
589 }
590
591
592 static int
593 lookupFlag_read(char *page, char **start, off_t off,
594                    int count, int *eof, void *data)
595 {
596         int len;
597
598         len = sprintf(page, "%d\n", lookupCacheEnabled);
599
600         len -= off;
601         *start = page + off;
602
603         if (len > count)
604                 len = count;
605         else
606                 *eof = 1;
607
608         if (len < 0)
609                 len = 0;
610
611         return len;
612 }
613 static int
614 lookupFlag_write(struct file *file, const char __user *buffer,
615                     unsigned long count, void *data)
616 {
617         char c;
618         int rc;
619
620         rc = get_user(c, buffer);
621         if (rc)
622                 return rc;
623         if (c == '0' || c == 'n' || c == 'N')
624                 lookupCacheEnabled = 0;
625         else if (c == '1' || c == 'y' || c == 'Y')
626                 lookupCacheEnabled = 1;
627
628         return count;
629 }
630 static int
631 traceSMB_read(char *page, char **start, off_t off, int count,
632               int *eof, void *data)
633 {
634         int len;
635
636         len = sprintf(page, "%d\n", traceSMB);
637
638         len -= off;
639         *start = page + off;
640
641         if (len > count)
642                 len = count;
643         else
644                 *eof = 1;
645
646         if (len < 0)
647                 len = 0;
648
649         return len;
650 }
651 static int
652 traceSMB_write(struct file *file, const char __user *buffer,
653                unsigned long count, void *data)
654 {
655         char c;
656         int rc;
657
658         rc = get_user(c, buffer);
659         if (rc)
660                 return rc;
661         if (c == '0' || c == 'n' || c == 'N')
662                 traceSMB = 0;
663         else if (c == '1' || c == 'y' || c == 'Y')
664                 traceSMB = 1;
665
666         return count;
667 }
668
669 static int
670 multiuser_mount_read(char *page, char **start, off_t off,
671                      int count, int *eof, void *data)
672 {
673         int len;
674
675         len = sprintf(page, "%d\n", multiuser_mount);
676
677         len -= off;
678         *start = page + off;
679
680         if (len > count)
681                 len = count;
682         else
683                 *eof = 1;
684
685         if (len < 0)
686                 len = 0;
687
688         return len;
689 }
690 static int
691 multiuser_mount_write(struct file *file, const char __user *buffer,
692                       unsigned long count, void *data)
693 {
694         char c;
695         int rc;
696
697         rc = get_user(c, buffer);
698         if (rc)
699                 return rc;
700         if (c == '0' || c == 'n' || c == 'N')
701                 multiuser_mount = 0;
702         else if (c == '1' || c == 'y' || c == 'Y')
703                 multiuser_mount = 1;
704
705         return count;
706 }
707
708 static int
709 extended_security_read(char *page, char **start, off_t off,
710                        int count, int *eof, void *data)
711 {
712         int len;
713
714         len = sprintf(page, "%d\n", extended_security);
715
716         len -= off;
717         *start = page + off;
718
719         if (len > count)
720                 len = count;
721         else
722                 *eof = 1;
723
724         if (len < 0)
725                 len = 0;
726
727         return len;
728 }
729 static int
730 extended_security_write(struct file *file, const char __user *buffer,
731                         unsigned long count, void *data)
732 {
733         char c;
734         int rc;
735
736         rc = get_user(c, buffer);
737         if (rc)
738                 return rc;
739         if (c == '0' || c == 'n' || c == 'N')
740                 extended_security = 0;
741         else if (c == '1' || c == 'y' || c == 'Y')
742                 extended_security = 1;
743
744         return count;
745 }
746
747 static int
748 ntlmv2_enabled_read(char *page, char **start, off_t off,
749                        int count, int *eof, void *data)
750 {
751         int len;
752
753         len = sprintf(page, "%d\n", ntlmv2_support);
754
755         len -= off;
756         *start = page + off;
757
758         if (len > count)
759                 len = count;
760         else
761                 *eof = 1;
762
763         if (len < 0)
764                 len = 0;
765
766         return len;
767 }
768 static int
769 ntlmv2_enabled_write(struct file *file, const char __user *buffer,
770                         unsigned long count, void *data)
771 {
772         char c;
773         int rc;
774
775         rc = get_user(c, buffer);
776         if (rc)
777                 return rc;
778         if (c == '0' || c == 'n' || c == 'N')
779                 ntlmv2_support = 0;
780         else if (c == '1' || c == 'y' || c == 'Y')
781                 ntlmv2_support = 1;
782
783         return count;
784 }
785
786 static int
787 packet_signing_enabled_read(char *page, char **start, off_t off,
788                        int count, int *eof, void *data)
789 {
790         int len;
791
792         len = sprintf(page, "%d\n", sign_CIFS_PDUs);
793
794         len -= off;
795         *start = page + off;
796
797         if (len > count)
798                 len = count;
799         else
800                 *eof = 1;
801
802         if (len < 0)
803                 len = 0;
804
805         return len;
806 }
807 static int
808 packet_signing_enabled_write(struct file *file, const char __user *buffer,
809                         unsigned long count, void *data)
810 {
811         char c;
812         int rc;
813
814         rc = get_user(c, buffer);
815         if (rc)
816                 return rc;
817         if (c == '0' || c == 'n' || c == 'N')
818                 sign_CIFS_PDUs = 0;
819         else if (c == '1' || c == 'y' || c == 'Y')
820                 sign_CIFS_PDUs = 1;
821         else if (c == '2')
822                 sign_CIFS_PDUs = 2;
823
824         return count;
825 }
826
827
828 #endif