fs/cifs/cifs_debug.c - kernel/msm-5.4 - Gitiles

 /*
  *   fs/cifs_debug.c
  *
  *   Copyright (C) International Business Machines  Corp., 2000,2005
  *
  *   Modified by Steve French (sfrench@us.ibm.com)
  *
  *   This program is free software;  you can redistribute it and/or modify
  *   it under the terms of the GNU General Public License as published by
  *   the Free Software Foundation; either version 2 of the License, or
  *   (at your option) any later version.
  *
  *   This program is distributed in the hope that it will be useful,
  *   but WITHOUT ANY WARRANTY;  without even the implied warranty of
  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See
  *   the GNU General Public License for more details.
  *
  *   You should have received a copy of the GNU General Public License
  *   along with this program;  if not, write to the Free Software
  *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  */
 #include <linux/fs.h>
 #include <linux/string.h>
 #include <linux/ctype.h>
 #include <linux/module.h>
 #include <linux/proc_fs.h>
 #include <asm/uaccess.h>
 #include "cifspdu.h"
 #include "cifsglob.h"
 #include "cifsproto.h"
 #include "cifs_debug.h"
 #include "cifsfs.h"

 void
 cifs_dump_mem(char *label, void *data, int length)
 {
 	int i, j;
 	int *intptr = data;
 	char *charptr = data;
 	char buf[10], line[80];

 	printk(KERN_DEBUG "%s: dump of %d bytes of data at 0x%p\n\n",
 		label, length, data);
 	for (i = 0; i < length; i += 16) {
 		line[0] = 0;
 		for (j = 0; (j < 4) && (i + j * 4 < length); j++) {
 			sprintf(buf, " %08x", intptr[i / 4 + j]);
 			strcat(line, buf);
 		}
 		buf[0] = ' ';
 		buf[2] = 0;
 		for (j = 0; (j < 16) && (i + j < length); j++) {
 			buf[1] = isprint(charptr[i + j]) ? charptr[i + j] : '.';
 			strcat(line, buf);
 		}
 		printk(KERN_DEBUG "%s\n", line);
 	}
 }

 #ifdef CONFIG_PROC_FS
 static int
 cifs_debug_data_read(char *buf, char **beginBuffer, off_t offset,
 		     int count, int *eof, void *data)
 {
 	struct list_head *tmp;
 	struct list_head *tmp1;
 	struct mid_q_entry * mid_entry;
 	struct cifsSesInfo *ses;
 	struct cifsTconInfo *tcon;
 	int i;
 	int length = 0;
 	char * original_buf = buf;

 	*beginBuffer = buf + offset;


 	length =
 	    sprintf(buf,
 		    "Display Internal CIFS Data Structures for Debugging\n"
 		    "---------------------------------------------------\n");
 	buf += length;
 	length = sprintf(buf,"CIFS Version %s\n",CIFS_VERSION);
 	buf += length;
 	length = sprintf(buf, "Servers:");
 	buf += length;

 	i = 0;
 	read_lock(&GlobalSMBSeslock);
 	list_for_each(tmp, &GlobalSMBSessionList) {
 		i++;
 		ses = list_entry(tmp, struct cifsSesInfo, cifsSessionList);
 		if((ses->serverDomain == NULL) || (ses->serverOS == NULL) ||
 		   (ses->serverNOS == NULL)) {
 			buf += sprintf("\nentry for %s not fully displayed\n\t",
 					ses->serverName);

 		} else {
 			length =
 			    sprintf(buf,
 				    "\n%d) Name: %s  Domain: %s Mounts: %d ServerOS: %s  \n\tServerNOS: %s\tCapabilities: 0x%x\n\tSMB session status: %d\t",
 				i, ses->serverName, ses->serverDomain,
 				atomic_read(&ses->inUse),
 				ses->serverOS, ses->serverNOS,
 				ses->capabilities,ses->status);
 			buf += length;
 		}
 		if(ses->server) {
 			buf += sprintf(buf, "TCP status: %d\n\tLocal Users To Server: %d SecMode: 0x%x Req Active: %d",
 				ses->server->tcpStatus,
 				atomic_read(&ses->server->socketUseCount),
 				ses->server->secMode,
 				atomic_read(&ses->server->inFlight));

 			length = sprintf(buf, "\nMIDs:\n");
 			buf += length;

 			spin_lock(&GlobalMid_Lock);
 			list_for_each(tmp1, &ses->server->pending_mid_q) {
 				mid_entry = list_entry(tmp1, struct
 					mid_q_entry,
 					qhead);
 				if(mid_entry) {
 					length = sprintf(buf,"State: %d com: %d pid: %d tsk: %p mid %d\n",
 						mid_entry->midState,
 						(int)mid_entry->command,
 						mid_entry->pid,
 						mid_entry->tsk,
 						mid_entry->mid);
 					buf += length;
 				}
 			}
 			spin_unlock(&GlobalMid_Lock);
 		}

 	}
 	read_unlock(&GlobalSMBSeslock);
 	sprintf(buf, "\n");
 	buf++;

 	length = sprintf(buf, "Shares:");
 	buf += length;

 	i = 0;
 	read_lock(&GlobalSMBSeslock);
 	list_for_each(tmp, &GlobalTreeConnectionList) {
 		__u32 dev_type;
 		i++;
 		tcon = list_entry(tmp, struct cifsTconInfo, cifsConnectionList);
 		dev_type = le32_to_cpu(tcon->fsDevInfo.DeviceType);
 		length =
 		    sprintf(buf,
 			    "\n%d) %s Uses: %d Type: %s Characteristics: 0x%x Attributes: 0x%x\nPathComponentMax: %d Status: %d",
 			    i, tcon->treeName,
 			    atomic_read(&tcon->useCount),
 			    tcon->nativeFileSystem,
 			    le32_to_cpu(tcon->fsDevInfo.DeviceCharacteristics),
 			    le32_to_cpu(tcon->fsAttrInfo.Attributes),
 			    le32_to_cpu(tcon->fsAttrInfo.MaxPathNameComponentLength),
 			    tcon->tidStatus);
 		buf += length;
 		if (dev_type == FILE_DEVICE_DISK)
 			length = sprintf(buf, " type: DISK ");
 		else if (dev_type == FILE_DEVICE_CD_ROM)
 			length = sprintf(buf, " type: CDROM ");
 		else
 			length =
 			    sprintf(buf, " type: %d ", dev_type);
 		buf += length;
 		if(tcon->tidStatus == CifsNeedReconnect) {
 			buf += sprintf(buf, "\tDISCONNECTED ");
 			length += 14;
 		}
 	}
 	read_unlock(&GlobalSMBSeslock);

 	length = sprintf(buf, "\n");
 	buf += length;

 	/* BB add code to dump additional info such as TCP session info now */
 	/* Now calculate total size of returned data */
 	length = buf - original_buf;

 	if(offset + count >= length)
 		*eof = 1;
 	if(length < offset) {
 		*eof = 1;
 		return 0;
 	} else {
 		length = length - offset;
 	}
 	if (length > count)
 		length = count;

 	return length;
 }

 #ifdef CONFIG_CIFS_STATS
 static int
 cifs_stats_read(char *buf, char **beginBuffer, off_t offset,
 		  int count, int *eof, void *data)
 {
 	int item_length,i,length;
 	struct list_head *tmp;
 	struct cifsTconInfo *tcon;

 	*beginBuffer = buf + offset;

 	length = sprintf(buf,
 			"Resources in use\nCIFS Session: %d\n",
 			sesInfoAllocCount.counter);
 	buf += length;
 	item_length =
 		sprintf(buf,"Share (unique mount targets): %d\n",
 			tconInfoAllocCount.counter);
 	length += item_length;
 	buf += item_length;
 	item_length =
 		sprintf(buf,"SMB Request/Response Buffer: %d Pool size: %d\n",
 			bufAllocCount.counter,
 			cifs_min_rcv + tcpSesAllocCount.counter);
 	length += item_length;
 	buf += item_length;
 	item_length =
 		sprintf(buf,"SMB Small Req/Resp Buffer: %d Pool size: %d\n",
 			smBufAllocCount.counter,cifs_min_small);
 	length += item_length;
 	buf += item_length;
 	item_length =
 		sprintf(buf,"Operations (MIDs): %d\n",
 			midCount.counter);
 	length += item_length;
 	buf += item_length;
 	item_length = sprintf(buf,
 		"\n%d session %d share reconnects\n",
 		tcpSesReconnectCount.counter,tconInfoReconnectCount.counter);
 	length += item_length;
 	buf += item_length;

 	item_length = sprintf(buf,
 		"Total vfs operations: %d maximum at one time: %d\n",
 		GlobalCurrentXid,GlobalMaxActiveXid);
 	length += item_length;
 	buf += item_length;

 	i = 0;
 	read_lock(&GlobalSMBSeslock);
 	list_for_each(tmp, &GlobalTreeConnectionList) {
 		i++;
 		tcon = list_entry(tmp, struct cifsTconInfo, cifsConnectionList);
 		item_length = sprintf(buf,"\n%d) %s",i, tcon->treeName);
 		buf += item_length;
 		length += item_length;
 		if(tcon->tidStatus == CifsNeedReconnect) {
 			buf += sprintf(buf, "\tDISCONNECTED ");
 			length += 14;
 		}
 		item_length = sprintf(buf, "\nSMBs: %d Oplock Breaks: %d",
 			atomic_read(&tcon->num_smbs_sent),
 			atomic_read(&tcon->num_oplock_brks));
 		buf += item_length;
 		length += item_length;
 		item_length = sprintf(buf, "\nReads: %d Bytes %lld",
 			atomic_read(&tcon->num_reads),
 			(long long)(tcon->bytes_read));
 		buf += item_length;
 		length += item_length;
 		item_length = sprintf(buf, "\nWrites: %d Bytes: %lld",
 			atomic_read(&tcon->num_writes),
 			(long long)(tcon->bytes_written));
                 buf += item_length;
                 length += item_length;
                 item_length = sprintf(buf,
 			"\nLocks: %d HardLinks: %d Symlinks: %d",
                         atomic_read(&tcon->num_locks),
 			atomic_read(&tcon->num_hardlinks),
 			atomic_read(&tcon->num_symlinks));
                 buf += item_length;
                 length += item_length;

 		item_length = sprintf(buf, "\nOpens: %d Closes: %d Deletes: %d",
 			atomic_read(&tcon->num_opens),
 			atomic_read(&tcon->num_closes),
 			atomic_read(&tcon->num_deletes));
 		buf += item_length;
 		length += item_length;
 		item_length = sprintf(buf, "\nMkdirs: %d Rmdirs: %d",
 			atomic_read(&tcon->num_mkdirs),
 			atomic_read(&tcon->num_rmdirs));
 		buf += item_length;
 		length += item_length;
 		item_length = sprintf(buf, "\nRenames: %d T2 Renames %d",
 			atomic_read(&tcon->num_renames),
 			atomic_read(&tcon->num_t2renames));
 		buf += item_length;
 		length += item_length;
 		item_length = sprintf(buf, "\nFindFirst: %d FNext %d FClose %d",
 			atomic_read(&tcon->num_ffirst),
 			atomic_read(&tcon->num_fnext),
 			atomic_read(&tcon->num_fclose));
 		buf += item_length;
 		length += item_length;
 	}
 	read_unlock(&GlobalSMBSeslock);

 	buf += sprintf(buf,"\n");
 	length++;

 	if(offset + count >= length)
 		*eof = 1;
 	if(length < offset) {
 		*eof = 1;
 		return 0;
 	} else {
 		length = length - offset;
 	}
 	if (length > count)
 		length = count;

 	return length;
 }
 #endif

 static struct proc_dir_entry *proc_fs_cifs;
 read_proc_t cifs_txanchor_read;
 static read_proc_t cifsFYI_read;
 static write_proc_t cifsFYI_write;
 static read_proc_t oplockEnabled_read;
 static write_proc_t oplockEnabled_write;
 static read_proc_t lookupFlag_read;
 static write_proc_t lookupFlag_write;
 static read_proc_t traceSMB_read;
 static write_proc_t traceSMB_write;
 static read_proc_t multiuser_mount_read;
 static write_proc_t multiuser_mount_write;
 static read_proc_t extended_security_read;
 static write_proc_t extended_security_write;
 static read_proc_t ntlmv2_enabled_read;
 static write_proc_t ntlmv2_enabled_write;
 static read_proc_t packet_signing_enabled_read;
 static write_proc_t packet_signing_enabled_write;
 static read_proc_t quotaEnabled_read;
 static write_proc_t quotaEnabled_write;
 static read_proc_t linuxExtensionsEnabled_read;
 static write_proc_t linuxExtensionsEnabled_write;

 void
 cifs_proc_init(void)
 {
 	struct proc_dir_entry *pde;

 	proc_fs_cifs = proc_mkdir("cifs", proc_root_fs);
 	if (proc_fs_cifs == NULL)
 		return;

 	proc_fs_cifs->owner = THIS_MODULE;
 	create_proc_read_entry("DebugData", 0, proc_fs_cifs,
 				cifs_debug_data_read, NULL);

 #ifdef CONFIG_CIFS_STATS
 	create_proc_read_entry("Stats", 0, proc_fs_cifs,
 				cifs_stats_read, NULL);
 #endif
 	pde = create_proc_read_entry("cifsFYI", 0, proc_fs_cifs,
 				cifsFYI_read, NULL);
 	if (pde)
 		pde->write_proc = cifsFYI_write;

 	pde =
 	    create_proc_read_entry("traceSMB", 0, proc_fs_cifs,
 				traceSMB_read, NULL);
 	if (pde)
 		pde->write_proc = traceSMB_write;

 	pde = create_proc_read_entry("OplockEnabled", 0, proc_fs_cifs,
 				oplockEnabled_read, NULL);
 	if (pde)
 		pde->write_proc = oplockEnabled_write;

 	pde = create_proc_read_entry("Experimental", 0, proc_fs_cifs,
 				quotaEnabled_read, NULL);
 	if (pde)
 		pde->write_proc = quotaEnabled_write;

 	pde = create_proc_read_entry("LinuxExtensionsEnabled", 0, proc_fs_cifs,
 				linuxExtensionsEnabled_read, NULL);
 	if (pde)
 		pde->write_proc = linuxExtensionsEnabled_write;

 	pde =
 	    create_proc_read_entry("MultiuserMount", 0, proc_fs_cifs,
 				multiuser_mount_read, NULL);
 	if (pde)
 		pde->write_proc = multiuser_mount_write;

 	pde =
 	    create_proc_read_entry("ExtendedSecurity", 0, proc_fs_cifs,
 				extended_security_read, NULL);
 	if (pde)
 		pde->write_proc = extended_security_write;

 	pde =
 	create_proc_read_entry("LookupCacheEnabled", 0, proc_fs_cifs,
 				lookupFlag_read, NULL);
 	if (pde)
 		pde->write_proc = lookupFlag_write;

 	pde =
 	    create_proc_read_entry("NTLMV2Enabled", 0, proc_fs_cifs,
 				ntlmv2_enabled_read, NULL);
 	if (pde)
 		pde->write_proc = ntlmv2_enabled_write;

 	pde =
 	    create_proc_read_entry("PacketSigningEnabled", 0, proc_fs_cifs,
 				packet_signing_enabled_read, NULL);
 	if (pde)
 		pde->write_proc = packet_signing_enabled_write;
 }

 void
 cifs_proc_clean(void)
 {
 	if (proc_fs_cifs == NULL)
 		return;

 	remove_proc_entry("DebugData", proc_fs_cifs);
 	remove_proc_entry("cifsFYI", proc_fs_cifs);
 	remove_proc_entry("traceSMB", proc_fs_cifs);
 #ifdef CONFIG_CIFS_STATS
 	remove_proc_entry("Stats", proc_fs_cifs);
 #endif
 	remove_proc_entry("MultiuserMount", proc_fs_cifs);
 	remove_proc_entry("OplockEnabled", proc_fs_cifs);
 	remove_proc_entry("NTLMV2Enabled",proc_fs_cifs);
 	remove_proc_entry("ExtendedSecurity",proc_fs_cifs);
 	remove_proc_entry("PacketSigningEnabled",proc_fs_cifs);
 	remove_proc_entry("LinuxExtensionsEnabled",proc_fs_cifs);
 	remove_proc_entry("Experimental",proc_fs_cifs);
 	remove_proc_entry("LookupCacheEnabled",proc_fs_cifs);
 	remove_proc_entry("cifs", proc_root_fs);
 }

 static int
 cifsFYI_read(char *page, char **start, off_t off, int count,
 	     int *eof, void *data)
 {
 	int len;

 	len = sprintf(page, "%d\n", cifsFYI);

 	len -= off;
 	*start = page + off;

 	if (len > count)
 		len = count;
 	else
 		*eof = 1;

 	if (len < 0)
 		len = 0;

 	return len;
 }
 static int
 cifsFYI_write(struct file *file, const char __user *buffer,
 	      unsigned long count, void *data)
 {
 	char c;
 	int rc;

 	rc = get_user(c, buffer);
 	if (rc)
 		return rc;
 	if (c == '0' || c == 'n' || c == 'N')
 		cifsFYI = 0;
 	else if (c == '1' || c == 'y' || c == 'Y')
 		cifsFYI = 1;

 	return count;
 }

 static int
 oplockEnabled_read(char *page, char **start, off_t off,
 		   int count, int *eof, void *data)
 {
 	int len;

 	len = sprintf(page, "%d\n", oplockEnabled);

 	len -= off;
 	*start = page + off;

 	if (len > count)
 		len = count;
 	else
 		*eof = 1;

 	if (len < 0)
 		len = 0;

 	return len;
 }
 static int
 oplockEnabled_write(struct file *file, const char __user *buffer,
 		    unsigned long count, void *data)
 {
 	char c;
 	int rc;

 	rc = get_user(c, buffer);
 	if (rc)
 		return rc;
 	if (c == '0' || c == 'n' || c == 'N')
 		oplockEnabled = 0;
 	else if (c == '1' || c == 'y' || c == 'Y')
 		oplockEnabled = 1;

 	return count;
 }

 static int
 quotaEnabled_read(char *page, char **start, off_t off,
                    int count, int *eof, void *data)
 {
         int len;

         len = sprintf(page, "%d\n", experimEnabled);
 /* could also check if quotas are enabled in kernel
 	as a whole first */
         len -= off;
         *start = page + off;

         if (len > count)
                 len = count;
         else
                 *eof = 1;

         if (len < 0)
                 len = 0;

         return len;
 }
 static int
 quotaEnabled_write(struct file *file, const char __user *buffer,
                     unsigned long count, void *data)
 {
         char c;
         int rc;

         rc = get_user(c, buffer);
         if (rc)
                 return rc;
         if (c == '0' || c == 'n' || c == 'N')
                 experimEnabled = 0;
         else if (c == '1' || c == 'y' || c == 'Y')
                 experimEnabled = 1;

         return count;
 }

 static int
 linuxExtensionsEnabled_read(char *page, char **start, off_t off,
                    int count, int *eof, void *data)
 {
         int len;

         len = sprintf(page, "%d\n", linuxExtEnabled);
 /* could also check if quotas are enabled in kernel
 	as a whole first */
         len -= off;
         *start = page + off;

         if (len > count)
                 len = count;
         else
                 *eof = 1;

         if (len < 0)
                 len = 0;

         return len;
 }
 static int
 linuxExtensionsEnabled_write(struct file *file, const char __user *buffer,
                     unsigned long count, void *data)
 {
         char c;
         int rc;

         rc = get_user(c, buffer);
         if (rc)
                 return rc;
         if (c == '0' || c == 'n' || c == 'N')
                 linuxExtEnabled = 0;
         else if (c == '1' || c == 'y' || c == 'Y')
                 linuxExtEnabled = 1;

         return count;
 }


 static int
 lookupFlag_read(char *page, char **start, off_t off,
 		   int count, int *eof, void *data)
 {
 	int len;

 	len = sprintf(page, "%d\n", lookupCacheEnabled);

 	len -= off;
 	*start = page + off;

 	if (len > count)
 		len = count;
 	else
 		*eof = 1;

 	if (len < 0)
 		len = 0;

 	return len;
 }
 static int
 lookupFlag_write(struct file *file, const char __user *buffer,
 		    unsigned long count, void *data)
 {
 	char c;
 	int rc;

 	rc = get_user(c, buffer);
 	if (rc)
 		return rc;
 	if (c == '0' || c == 'n' || c == 'N')
 		lookupCacheEnabled = 0;
 	else if (c == '1' || c == 'y' || c == 'Y')
 		lookupCacheEnabled = 1;

 	return count;
 }
 static int
 traceSMB_read(char *page, char **start, off_t off, int count,
 	      int *eof, void *data)
 {
 	int len;

 	len = sprintf(page, "%d\n", traceSMB);

 	len -= off;
 	*start = page + off;

 	if (len > count)
 		len = count;
 	else
 		*eof = 1;

 	if (len < 0)
 		len = 0;

 	return len;
 }
 static int
 traceSMB_write(struct file *file, const char __user *buffer,
 	       unsigned long count, void *data)
 {
 	char c;
 	int rc;

 	rc = get_user(c, buffer);
 	if (rc)
 		return rc;
 	if (c == '0' || c == 'n' || c == 'N')
 		traceSMB = 0;
 	else if (c == '1' || c == 'y' || c == 'Y')
 		traceSMB = 1;

 	return count;
 }

 static int
 multiuser_mount_read(char *page, char **start, off_t off,
 		     int count, int *eof, void *data)
 {
 	int len;

 	len = sprintf(page, "%d\n", multiuser_mount);

 	len -= off;
 	*start = page + off;

 	if (len > count)
 		len = count;
 	else
 		*eof = 1;

 	if (len < 0)
 		len = 0;

 	return len;
 }
 static int
 multiuser_mount_write(struct file *file, const char __user *buffer,
 		      unsigned long count, void *data)
 {
 	char c;
 	int rc;

 	rc = get_user(c, buffer);
 	if (rc)
 		return rc;
 	if (c == '0' || c == 'n' || c == 'N')
 		multiuser_mount = 0;
 	else if (c == '1' || c == 'y' || c == 'Y')
 		multiuser_mount = 1;

 	return count;
 }

 static int
 extended_security_read(char *page, char **start, off_t off,
 		       int count, int *eof, void *data)
 {
 	int len;

 	len = sprintf(page, "%d\n", extended_security);

 	len -= off;
 	*start = page + off;

 	if (len > count)
 		len = count;
 	else
 		*eof = 1;

 	if (len < 0)
 		len = 0;

 	return len;
 }
 static int
 extended_security_write(struct file *file, const char __user *buffer,
 			unsigned long count, void *data)
 {
 	char c;
 	int rc;

 	rc = get_user(c, buffer);
 	if (rc)
 		return rc;
 	if (c == '0' || c == 'n' || c == 'N')
 		extended_security = 0;
 	else if (c == '1' || c == 'y' || c == 'Y')
 		extended_security = 1;

 	return count;
 }

 static int
 ntlmv2_enabled_read(char *page, char **start, off_t off,
 		       int count, int *eof, void *data)
 {
 	int len;

 	len = sprintf(page, "%d\n", ntlmv2_support);

 	len -= off;
 	*start = page + off;

 	if (len > count)
 		len = count;
 	else
 		*eof = 1;

 	if (len < 0)
 		len = 0;

 	return len;
 }
 static int
 ntlmv2_enabled_write(struct file *file, const char __user *buffer,
 			unsigned long count, void *data)
 {
 	char c;
 	int rc;

 	rc = get_user(c, buffer);
 	if (rc)
 		return rc;
 	if (c == '0' || c == 'n' || c == 'N')
 		ntlmv2_support = 0;
 	else if (c == '1' || c == 'y' || c == 'Y')
 		ntlmv2_support = 1;

 	return count;
 }

 static int
 packet_signing_enabled_read(char *page, char **start, off_t off,
 		       int count, int *eof, void *data)
 {
 	int len;

 	len = sprintf(page, "%d\n", sign_CIFS_PDUs);

 	len -= off;
 	*start = page + off;

 	if (len > count)
 		len = count;
 	else
 		*eof = 1;

 	if (len < 0)
 		len = 0;

 	return len;
 }
 static int
 packet_signing_enabled_write(struct file *file, const char __user *buffer,
 			unsigned long count, void *data)
 {
 	char c;
 	int rc;

 	rc = get_user(c, buffer);
 	if (rc)
 		return rc;
 	if (c == '0' || c == 'n' || c == 'N')
 		sign_CIFS_PDUs = 0;
 	else if (c == '1' || c == 'y' || c == 'Y')
 		sign_CIFS_PDUs = 1;
 	else if (c == '2')
 		sign_CIFS_PDUs = 2;

 	return count;
 }


 #endif
	/*
	* fs/cifs_debug.c
	*
	* Copyright (C) International Business Machines Corp., 2000,2005
	*
	* Modified by Steve French (sfrench@us.ibm.com)
	*
	* This program is free software; you can redistribute it and/or modify
	* it under the terms of the GNU General Public License as published by
	* the Free Software Foundation; either version 2 of the License, or
	* (at your option) any later version.
	*
	* This program is distributed in the hope that it will be useful,
	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
	* the GNU General Public License for more details.
	*
	* You should have received a copy of the GNU General Public License
	* along with this program; if not, write to the Free Software
	* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
	*/
	#include <linux/fs.h>
	#include <linux/string.h>
	#include <linux/ctype.h>
	#include <linux/module.h>
	#include <linux/proc_fs.h>
	#include <asm/uaccess.h>
	#include "cifspdu.h"
	#include "cifsglob.h"
	#include "cifsproto.h"
	#include "cifs_debug.h"
	#include "cifsfs.h"

	void
	cifs_dump_mem(char label, void data, int length)
	{
	int i, j;
	int *intptr = data;
	char *charptr = data;
	char buf[10], line[80];

	printk(KERN_DEBUG "%s: dump of %d bytes of data at 0x%p\n\n",
	label, length, data);
	for (i = 0; i < length; i += 16) {
	line[0] = 0;
	for (j = 0; (j < 4) && (i + j * 4 < length); j++) {
	sprintf(buf, " %08x", intptr[i / 4 + j]);
	strcat(line, buf);
	}
	buf[0] = ' ';
	buf[2] = 0;
	for (j = 0; (j < 16) && (i + j < length); j++) {
	buf[1] = isprint(charptr[i + j]) ? charptr[i + j] : '.';
	strcat(line, buf);
	}
	printk(KERN_DEBUG "%s\n", line);
	}
	}

	#ifdef CONFIG_PROC_FS
	static int
	cifs_debug_data_read(char buf, char *beginBuffer, off_t offset,
	int count, int eof, void data)
	{
	struct list_head *tmp;
	struct list_head *tmp1;
	struct mid_q_entry * mid_entry;
	struct cifsSesInfo *ses;
	struct cifsTconInfo *tcon;
	int i;
	int length = 0;
	char * original_buf = buf;

	*beginBuffer = buf + offset;


	length =
	sprintf(buf,
	"Display Internal CIFS Data Structures for Debugging\n"
	"---------------------------------------------------\n");
	buf += length;
	length = sprintf(buf,"CIFS Version %s\n",CIFS_VERSION);
	buf += length;
	length = sprintf(buf, "Servers:");
	buf += length;

	i = 0;
	read_lock(&GlobalSMBSeslock);
	list_for_each(tmp, &GlobalSMBSessionList) {
	i++;
	ses = list_entry(tmp, struct cifsSesInfo, cifsSessionList);
	if((ses->serverDomain == NULL) \|\| (ses->serverOS == NULL) \|\|
	(ses->serverNOS == NULL)) {
	buf += sprintf("\nentry for %s not fully displayed\n\t",
	ses->serverName);

	} else {
	length =
	sprintf(buf,
	"\n%d) Name: %s Domain: %s Mounts: %d ServerOS: %s \n\tServerNOS: %s\tCapabilities: 0x%x\n\tSMB session status: %d\t",
	i, ses->serverName, ses->serverDomain,
	atomic_read(&ses->inUse),
	ses->serverOS, ses->serverNOS,
	ses->capabilities,ses->status);
	buf += length;
	}
	if(ses->server) {
	buf += sprintf(buf, "TCP status: %d\n\tLocal Users To Server: %d SecMode: 0x%x Req Active: %d",
	ses->server->tcpStatus,
	atomic_read(&ses->server->socketUseCount),
	ses->server->secMode,
	atomic_read(&ses->server->inFlight));

	length = sprintf(buf, "\nMIDs:\n");
	buf += length;

	spin_lock(&GlobalMid_Lock);
	list_for_each(tmp1, &ses->server->pending_mid_q) {
	mid_entry = list_entry(tmp1, struct
	mid_q_entry,
	qhead);
	if(mid_entry) {
	length = sprintf(buf,"State: %d com: %d pid: %d tsk: %p mid %d\n",
	mid_entry->midState,
	(int)mid_entry->command,
	mid_entry->pid,
	mid_entry->tsk,
	mid_entry->mid);
	buf += length;
	}
	}
	spin_unlock(&GlobalMid_Lock);
	}

	}
	read_unlock(&GlobalSMBSeslock);
	sprintf(buf, "\n");
	buf++;

	length = sprintf(buf, "Shares:");
	buf += length;

	i = 0;
	read_lock(&GlobalSMBSeslock);
	list_for_each(tmp, &GlobalTreeConnectionList) {
	__u32 dev_type;
	i++;
	tcon = list_entry(tmp, struct cifsTconInfo, cifsConnectionList);
	dev_type = le32_to_cpu(tcon->fsDevInfo.DeviceType);
	length =
	sprintf(buf,
	"\n%d) %s Uses: %d Type: %s Characteristics: 0x%x Attributes: 0x%x\nPathComponentMax: %d Status: %d",
	i, tcon->treeName,
	atomic_read(&tcon->useCount),
	tcon->nativeFileSystem,
	le32_to_cpu(tcon->fsDevInfo.DeviceCharacteristics),
	le32_to_cpu(tcon->fsAttrInfo.Attributes),
	le32_to_cpu(tcon->fsAttrInfo.MaxPathNameComponentLength),
	tcon->tidStatus);
	buf += length;
	if (dev_type == FILE_DEVICE_DISK)
	length = sprintf(buf, " type: DISK ");
	else if (dev_type == FILE_DEVICE_CD_ROM)
	length = sprintf(buf, " type: CDROM ");
	else
	length =
	sprintf(buf, " type: %d ", dev_type);
	buf += length;
	if(tcon->tidStatus == CifsNeedReconnect) {
	buf += sprintf(buf, "\tDISCONNECTED ");
	length += 14;
	}
	}
	read_unlock(&GlobalSMBSeslock);

	length = sprintf(buf, "\n");
	buf += length;

	/* BB add code to dump additional info such as TCP session info now */
	/* Now calculate total size of returned data */
	length = buf - original_buf;

	if(offset + count >= length)
	*eof = 1;
	if(length < offset) {
	*eof = 1;
	return 0;
	} else {
	length = length - offset;
	}
	if (length > count)
	length = count;

	return length;
	}

	#ifdef CONFIG_CIFS_STATS
	static int
	cifs_stats_read(char buf, char *beginBuffer, off_t offset,
	int count, int eof, void data)
	{
	int item_length,i,length;
	struct list_head *tmp;
	struct cifsTconInfo *tcon;

	*beginBuffer = buf + offset;

	length = sprintf(buf,
	"Resources in use\nCIFS Session: %d\n",
	sesInfoAllocCount.counter);
	buf += length;
	item_length =
	sprintf(buf,"Share (unique mount targets): %d\n",
	tconInfoAllocCount.counter);
	length += item_length;
	buf += item_length;
	item_length =
	sprintf(buf,"SMB Request/Response Buffer: %d Pool size: %d\n",
	bufAllocCount.counter,
	cifs_min_rcv + tcpSesAllocCount.counter);
	length += item_length;
	buf += item_length;
	item_length =
	sprintf(buf,"SMB Small Req/Resp Buffer: %d Pool size: %d\n",
	smBufAllocCount.counter,cifs_min_small);
	length += item_length;
	buf += item_length;
	item_length =
	sprintf(buf,"Operations (MIDs): %d\n",
	midCount.counter);
	length += item_length;
	buf += item_length;
	item_length = sprintf(buf,
	"\n%d session %d share reconnects\n",
	tcpSesReconnectCount.counter,tconInfoReconnectCount.counter);
	length += item_length;
	buf += item_length;

	item_length = sprintf(buf,
	"Total vfs operations: %d maximum at one time: %d\n",
	GlobalCurrentXid,GlobalMaxActiveXid);
	length += item_length;
	buf += item_length;

	i = 0;
	read_lock(&GlobalSMBSeslock);
	list_for_each(tmp, &GlobalTreeConnectionList) {
	i++;
	tcon = list_entry(tmp, struct cifsTconInfo, cifsConnectionList);
	item_length = sprintf(buf,"\n%d) %s",i, tcon->treeName);
	buf += item_length;
	length += item_length;
	if(tcon->tidStatus == CifsNeedReconnect) {
	buf += sprintf(buf, "\tDISCONNECTED ");
	length += 14;
	}
	item_length = sprintf(buf, "\nSMBs: %d Oplock Breaks: %d",
	atomic_read(&tcon->num_smbs_sent),
	atomic_read(&tcon->num_oplock_brks));
	buf += item_length;
	length += item_length;
	item_length = sprintf(buf, "\nReads: %d Bytes %lld",
	atomic_read(&tcon->num_reads),
	(long long)(tcon->bytes_read));
	buf += item_length;
	length += item_length;
	item_length = sprintf(buf, "\nWrites: %d Bytes: %lld",
	atomic_read(&tcon->num_writes),
	(long long)(tcon->bytes_written));
	buf += item_length;
	length += item_length;
	item_length = sprintf(buf,
	"\nLocks: %d HardLinks: %d Symlinks: %d",
	atomic_read(&tcon->num_locks),
	atomic_read(&tcon->num_hardlinks),
	atomic_read(&tcon->num_symlinks));
	buf += item_length;
	length += item_length;

	item_length = sprintf(buf, "\nOpens: %d Closes: %d Deletes: %d",
	atomic_read(&tcon->num_opens),
	atomic_read(&tcon->num_closes),
	atomic_read(&tcon->num_deletes));
	buf += item_length;
	length += item_length;
	item_length = sprintf(buf, "\nMkdirs: %d Rmdirs: %d",
	atomic_read(&tcon->num_mkdirs),
	atomic_read(&tcon->num_rmdirs));
	buf += item_length;
	length += item_length;
	item_length = sprintf(buf, "\nRenames: %d T2 Renames %d",
	atomic_read(&tcon->num_renames),
	atomic_read(&tcon->num_t2renames));
	buf += item_length;
	length += item_length;
	item_length = sprintf(buf, "\nFindFirst: %d FNext %d FClose %d",
	atomic_read(&tcon->num_ffirst),
	atomic_read(&tcon->num_fnext),
	atomic_read(&tcon->num_fclose));
	buf += item_length;
	length += item_length;
	}
	read_unlock(&GlobalSMBSeslock);

	buf += sprintf(buf,"\n");
	length++;

	if(offset + count >= length)
	*eof = 1;
	if(length < offset) {
	*eof = 1;
	return 0;
	} else {
	length = length - offset;
	}
	if (length > count)
	length = count;

	return length;
	}
	#endif

	static struct proc_dir_entry *proc_fs_cifs;
	read_proc_t cifs_txanchor_read;
	static read_proc_t cifsFYI_read;
	static write_proc_t cifsFYI_write;
	static read_proc_t oplockEnabled_read;
	static write_proc_t oplockEnabled_write;
	static read_proc_t lookupFlag_read;
	static write_proc_t lookupFlag_write;
	static read_proc_t traceSMB_read;
	static write_proc_t traceSMB_write;
	static read_proc_t multiuser_mount_read;
	static write_proc_t multiuser_mount_write;
	static read_proc_t extended_security_read;
	static write_proc_t extended_security_write;
	static read_proc_t ntlmv2_enabled_read;
	static write_proc_t ntlmv2_enabled_write;
	static read_proc_t packet_signing_enabled_read;
	static write_proc_t packet_signing_enabled_write;
	static read_proc_t quotaEnabled_read;
	static write_proc_t quotaEnabled_write;
	static read_proc_t linuxExtensionsEnabled_read;
	static write_proc_t linuxExtensionsEnabled_write;

	void
	cifs_proc_init(void)
	{
	struct proc_dir_entry *pde;

	proc_fs_cifs = proc_mkdir("cifs", proc_root_fs);
	if (proc_fs_cifs == NULL)
	return;

	proc_fs_cifs->owner = THIS_MODULE;
	create_proc_read_entry("DebugData", 0, proc_fs_cifs,
	cifs_debug_data_read, NULL);

	#ifdef CONFIG_CIFS_STATS
	create_proc_read_entry("Stats", 0, proc_fs_cifs,
	cifs_stats_read, NULL);
	#endif
	pde = create_proc_read_entry("cifsFYI", 0, proc_fs_cifs,
	cifsFYI_read, NULL);
	if (pde)
	pde->write_proc = cifsFYI_write;

	pde =
	create_proc_read_entry("traceSMB", 0, proc_fs_cifs,
	traceSMB_read, NULL);
	if (pde)
	pde->write_proc = traceSMB_write;

	pde = create_proc_read_entry("OplockEnabled", 0, proc_fs_cifs,
	oplockEnabled_read, NULL);
	if (pde)
	pde->write_proc = oplockEnabled_write;

	pde = create_proc_read_entry("Experimental", 0, proc_fs_cifs,
	quotaEnabled_read, NULL);
	if (pde)
	pde->write_proc = quotaEnabled_write;

	pde = create_proc_read_entry("LinuxExtensionsEnabled", 0, proc_fs_cifs,
	linuxExtensionsEnabled_read, NULL);
	if (pde)
	pde->write_proc = linuxExtensionsEnabled_write;

	pde =
	create_proc_read_entry("MultiuserMount", 0, proc_fs_cifs,
	multiuser_mount_read, NULL);
	if (pde)
	pde->write_proc = multiuser_mount_write;

	pde =
	create_proc_read_entry("ExtendedSecurity", 0, proc_fs_cifs,
	extended_security_read, NULL);
	if (pde)
	pde->write_proc = extended_security_write;

	pde =
	create_proc_read_entry("LookupCacheEnabled", 0, proc_fs_cifs,
	lookupFlag_read, NULL);
	if (pde)
	pde->write_proc = lookupFlag_write;

	pde =
	create_proc_read_entry("NTLMV2Enabled", 0, proc_fs_cifs,
	ntlmv2_enabled_read, NULL);
	if (pde)
	pde->write_proc = ntlmv2_enabled_write;

	pde =
	create_proc_read_entry("PacketSigningEnabled", 0, proc_fs_cifs,
	packet_signing_enabled_read, NULL);
	if (pde)
	pde->write_proc = packet_signing_enabled_write;
	}

	void
	cifs_proc_clean(void)
	{
	if (proc_fs_cifs == NULL)
	return;

	remove_proc_entry("DebugData", proc_fs_cifs);
	remove_proc_entry("cifsFYI", proc_fs_cifs);
	remove_proc_entry("traceSMB", proc_fs_cifs);
	#ifdef CONFIG_CIFS_STATS
	remove_proc_entry("Stats", proc_fs_cifs);
	#endif
	remove_proc_entry("MultiuserMount", proc_fs_cifs);
	remove_proc_entry("OplockEnabled", proc_fs_cifs);
	remove_proc_entry("NTLMV2Enabled",proc_fs_cifs);
	remove_proc_entry("ExtendedSecurity",proc_fs_cifs);
	remove_proc_entry("PacketSigningEnabled",proc_fs_cifs);
	remove_proc_entry("LinuxExtensionsEnabled",proc_fs_cifs);
	remove_proc_entry("Experimental",proc_fs_cifs);
	remove_proc_entry("LookupCacheEnabled",proc_fs_cifs);
	remove_proc_entry("cifs", proc_root_fs);
	}

	static int
	cifsFYI_read(char page, char *start, off_t off, int count,
	int eof, void data)
	{
	int len;

	len = sprintf(page, "%d\n", cifsFYI);

	len -= off;
	*start = page + off;

	if (len > count)
	len = count;
	else
	*eof = 1;

	if (len < 0)
	len = 0;

	return len;
	}
	static int
	cifsFYI_write(struct file file, const char __user buffer,
	unsigned long count, void *data)
	{
	char c;
	int rc;

	rc = get_user(c, buffer);
	if (rc)
	return rc;
	if (c == '0' \|\| c == 'n' \|\| c == 'N')
	cifsFYI = 0;
	else if (c == '1' \|\| c == 'y' \|\| c == 'Y')
	cifsFYI = 1;

	return count;
	}

	static int
	oplockEnabled_read(char page, char *start, off_t off,
	int count, int eof, void data)
	{
	int len;

	len = sprintf(page, "%d\n", oplockEnabled);

	len -= off;
	*start = page + off;

	if (len > count)
	len = count;
	else
	*eof = 1;

	if (len < 0)
	len = 0;

	return len;
	}
	static int
	oplockEnabled_write(struct file file, const char __user buffer,
	unsigned long count, void *data)
	{
	char c;
	int rc;

	rc = get_user(c, buffer);
	if (rc)
	return rc;
	if (c == '0' \|\| c == 'n' \|\| c == 'N')
	oplockEnabled = 0;
	else if (c == '1' \|\| c == 'y' \|\| c == 'Y')
	oplockEnabled = 1;

	return count;
	}

	static int
	quotaEnabled_read(char page, char *start, off_t off,
	int count, int eof, void data)
	{
	int len;

	len = sprintf(page, "%d\n", experimEnabled);
	/* could also check if quotas are enabled in kernel
	as a whole first */
	len -= off;
	*start = page + off;

	if (len > count)
	len = count;
	else
	*eof = 1;

	if (len < 0)
	len = 0;

	return len;
	}
	static int
	quotaEnabled_write(struct file file, const char __user buffer,
	unsigned long count, void *data)
	{
	char c;
	int rc;

	rc = get_user(c, buffer);
	if (rc)
	return rc;
	if (c == '0' \|\| c == 'n' \|\| c == 'N')
	experimEnabled = 0;
	else if (c == '1' \|\| c == 'y' \|\| c == 'Y')
	experimEnabled = 1;

	return count;
	}

	static int
	linuxExtensionsEnabled_read(char page, char *start, off_t off,
	int count, int eof, void data)
	{
	int len;

	len = sprintf(page, "%d\n", linuxExtEnabled);
	/* could also check if quotas are enabled in kernel
	as a whole first */
	len -= off;
	*start = page + off;

	if (len > count)
	len = count;
	else
	*eof = 1;

	if (len < 0)
	len = 0;

	return len;
	}
	static int
	linuxExtensionsEnabled_write(struct file file, const char __user buffer,
	unsigned long count, void *data)
	{
	char c;
	int rc;

	rc = get_user(c, buffer);
	if (rc)
	return rc;
	if (c == '0' \|\| c == 'n' \|\| c == 'N')
	linuxExtEnabled = 0;
	else if (c == '1' \|\| c == 'y' \|\| c == 'Y')
	linuxExtEnabled = 1;

	return count;
	}


	static int
	lookupFlag_read(char page, char *start, off_t off,
	int count, int eof, void data)
	{
	int len;

	len = sprintf(page, "%d\n", lookupCacheEnabled);

	len -= off;
	*start = page + off;

	if (len > count)
	len = count;
	else
	*eof = 1;

	if (len < 0)
	len = 0;

	return len;
	}
	static int
	lookupFlag_write(struct file file, const char __user buffer,
	unsigned long count, void *data)
	{
	char c;
	int rc;

	rc = get_user(c, buffer);
	if (rc)
	return rc;
	if (c == '0' \|\| c == 'n' \|\| c == 'N')
	lookupCacheEnabled = 0;
	else if (c == '1' \|\| c == 'y' \|\| c == 'Y')
	lookupCacheEnabled = 1;

	return count;
	}
	static int
	traceSMB_read(char page, char *start, off_t off, int count,
	int eof, void data)
	{
	int len;

	len = sprintf(page, "%d\n", traceSMB);

	len -= off;
	*start = page + off;

	if (len > count)
	len = count;
	else
	*eof = 1;

	if (len < 0)
	len = 0;

	return len;
	}
	static int
	traceSMB_write(struct file file, const char __user buffer,
	unsigned long count, void *data)
	{
	char c;
	int rc;

	rc = get_user(c, buffer);
	if (rc)
	return rc;
	if (c == '0' \|\| c == 'n' \|\| c == 'N')
	traceSMB = 0;
	else if (c == '1' \|\| c == 'y' \|\| c == 'Y')
	traceSMB = 1;

	return count;
	}

	static int
	multiuser_mount_read(char page, char *start, off_t off,
	int count, int eof, void data)
	{
	int len;

	len = sprintf(page, "%d\n", multiuser_mount);

	len -= off;
	*start = page + off;

	if (len > count)
	len = count;
	else
	*eof = 1;

	if (len < 0)
	len = 0;

	return len;
	}
	static int
	multiuser_mount_write(struct file file, const char __user buffer,
	unsigned long count, void *data)
	{
	char c;
	int rc;

	rc = get_user(c, buffer);
	if (rc)
	return rc;
	if (c == '0' \|\| c == 'n' \|\| c == 'N')
	multiuser_mount = 0;
	else if (c == '1' \|\| c == 'y' \|\| c == 'Y')
	multiuser_mount = 1;

	return count;
	}

	static int
	extended_security_read(char page, char *start, off_t off,
	int count, int eof, void data)
	{
	int len;

	len = sprintf(page, "%d\n", extended_security);

	len -= off;
	*start = page + off;

	if (len > count)
	len = count;
	else
	*eof = 1;

	if (len < 0)
	len = 0;

	return len;
	}
	static int
	extended_security_write(struct file file, const char __user buffer,
	unsigned long count, void *data)
	{
	char c;
	int rc;

	rc = get_user(c, buffer);
	if (rc)
	return rc;
	if (c == '0' \|\| c == 'n' \|\| c == 'N')
	extended_security = 0;
	else if (c == '1' \|\| c == 'y' \|\| c == 'Y')
	extended_security = 1;

	return count;
	}

	static int
	ntlmv2_enabled_read(char page, char *start, off_t off,
	int count, int eof, void data)
	{
	int len;

	len = sprintf(page, "%d\n", ntlmv2_support);

	len -= off;
	*start = page + off;

	if (len > count)
	len = count;
	else
	*eof = 1;

	if (len < 0)
	len = 0;

	return len;
	}
	static int
	ntlmv2_enabled_write(struct file file, const char __user buffer,
	unsigned long count, void *data)
	{
	char c;
	int rc;

	rc = get_user(c, buffer);
	if (rc)
	return rc;
	if (c == '0' \|\| c == 'n' \|\| c == 'N')
	ntlmv2_support = 0;
	else if (c == '1' \|\| c == 'y' \|\| c == 'Y')
	ntlmv2_support = 1;

	return count;
	}

	static int
	packet_signing_enabled_read(char page, char *start, off_t off,
	int count, int eof, void data)
	{
	int len;

	len = sprintf(page, "%d\n", sign_CIFS_PDUs);

	len -= off;
	*start = page + off;

	if (len > count)
	len = count;
	else
	*eof = 1;

	if (len < 0)
	len = 0;

	return len;
	}
	static int
	packet_signing_enabled_write(struct file file, const char __user buffer,
	unsigned long count, void *data)
	{
	char c;
	int rc;

	rc = get_user(c, buffer);
	if (rc)
	return rc;
	if (c == '0' \|\| c == 'n' \|\| c == 'N')
	sign_CIFS_PDUs = 0;
	else if (c == '1' \|\| c == 'y' \|\| c == 'Y')
	sign_CIFS_PDUs = 1;
	else if (c == '2')
	sign_CIFS_PDUs = 2;

	return count;
	}


	#endif