/*
   *   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
  ",

  		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
  ", line);
  	}
  }

  #ifdef CONFIG_CIFS_DEBUG2

  void cifs_dump_detail(struct smb_hdr *smb)

  {

  	cERROR(1, "Cmd: %d Err: 0x%x Flags: 0x%x Flgs2: 0x%x Mid: %d Pid: %d",

  		  smb->Command, smb->Status.CifsError,

  		  smb->Flags, smb->Flags2, smb->Mid, smb->Pid);

  	cERROR(1, "smb buf %p len %d", smb, smbCalcSize(smb));

  }

  void cifs_dump_mids(struct TCP_Server_Info *server)

  {
  	struct list_head *tmp;

  	struct mid_q_entry *mid_entry;

  	if (server == NULL)

  		return;

  	cERROR(1, "Dump pending requests:");

  	spin_lock(&GlobalMid_Lock);
  	list_for_each(tmp, &server->pending_mid_q) {
  		mid_entry = list_entry(tmp, struct mid_q_entry, qhead);

  		cERROR(1, "State: %d Cmd: %d Pid: %d Cbdata: %p Mid %d",

  			mid_entry->midState,
  			(int)mid_entry->command,
  			mid_entry->pid,

  			mid_entry->callback_data,

  			mid_entry->mid);

  #ifdef CONFIG_CIFS_STATS2

  		cERROR(1, "IsLarge: %d buf: %p time rcv: %ld now: %ld",

  			mid_entry->largeBuf,
  			mid_entry->resp_buf,
  			mid_entry->when_received,

  			jiffies);

  #endif /* STATS2 */

  		cERROR(1, "IsMult: %d IsEnd: %d", mid_entry->multiRsp,
  			  mid_entry->multiEnd);

  		if (mid_entry->resp_buf) {
  			cifs_dump_detail(mid_entry->resp_buf);
  			cifs_dump_mem("existing buf: ",
  				mid_entry->resp_buf, 62);

  		}
  	}
  	spin_unlock(&GlobalMid_Lock);
  }
  #endif /* CONFIG_CIFS_DEBUG2 */

  #ifdef CONFIG_PROC_FS

  static int cifs_debug_data_proc_show(struct seq_file *m, void *v)

  {

  	struct list_head *tmp1, *tmp2, *tmp3;

  	struct mid_q_entry *mid_entry;

  	struct TCP_Server_Info *server;

  	struct cifs_ses *ses;
  	struct cifs_tcon *tcon;

  	int i, j;
  	__u32 dev_type;

  	seq_puts(m,

  		    "Display Internal CIFS Data Structures for Debugging
  "
  		    "---------------------------------------------------
  ");

  	seq_printf(m, "CIFS Version %s
  ", CIFS_VERSION);

  	seq_printf(m, "Features:");

  #ifdef CONFIG_CIFS_DFS_UPCALL

  	seq_printf(m, " dfs");

  #endif
  #ifdef CONFIG_CIFS_FSCACHE

  	seq_printf(m, " fscache");

  #endif
  #ifdef CONFIG_CIFS_WEAK_PW_HASH

  	seq_printf(m, " lanman");

  #endif
  #ifdef CONFIG_CIFS_POSIX

  	seq_printf(m, " posix");

  #endif
  #ifdef CONFIG_CIFS_UPCALL

  	seq_printf(m, " spnego");

  #endif
  #ifdef CONFIG_CIFS_XATTR

  	seq_printf(m, " xattr");
  #endif
  #ifdef CONFIG_CIFS_ACL
  	seq_printf(m, " acl");

  #endif
  	seq_putc(m, '
  ');

  	seq_printf(m, "Active VFS Requests: %d
  ", GlobalTotalActiveXid);
  	seq_printf(m, "Servers:");

  
  	i = 0;

  	spin_lock(&cifs_tcp_ses_lock);

  	list_for_each(tmp1, &cifs_tcp_ses_list) {
  		server = list_entry(tmp1, struct TCP_Server_Info,

  				    tcp_ses_list);

  		i++;

  		list_for_each(tmp2, &server->smb_ses_list) {

  			ses = list_entry(tmp2, struct cifs_ses,

  					 smb_ses_list);
  			if ((ses->serverDomain == NULL) ||
  				(ses->serverOS == NULL) ||
  				(ses->serverNOS == NULL)) {

  				seq_printf(m, "
  %d) entry for %s not fully "
  					   "displayed
  \t", i, ses->serverName);

  			} else {
  				seq_printf(m,

  				    "
  %d) Name: %s  Domain: %s Uses: %d OS:"
  				    " %s
  \tNOS: %s\tCapability: 0x%x
  \tSMB"

  				    " session status: %d\t",

  				i, ses->serverName, ses->serverDomain,

  				ses->ses_count, ses->serverOS, ses->serverNOS,

  				ses->capabilities, ses->status);

  			}

  			seq_printf(m, "TCP status: %d
  \tLocal Users To "

  				   "Server: %d SecMode: 0x%x Req On Wire: %d",
  				   server->tcpStatus, server->srv_count,

  				   server->sec_mode,

  				   atomic_read(&server->inFlight));

  
  #ifdef CONFIG_CIFS_STATS2

  			seq_printf(m, " In Send: %d In MaxReq Wait: %d",

  				atomic_read(&server->in_send),

  				atomic_read(&server->num_waiters));

  #endif

  			seq_puts(m, "
  \tShares:");
  			j = 0;
  			list_for_each(tmp3, &ses->tcon_list) {

  				tcon = list_entry(tmp3, struct cifs_tcon,

  						  tcon_list);
  				++j;
  				dev_type = le32_to_cpu(tcon->fsDevInfo.DeviceType);
  				seq_printf(m, "
  \t%d) %s Mounts: %d ", j,
  					   tcon->treeName, tcon->tc_count);
  				if (tcon->nativeFileSystem) {
  					seq_printf(m, "Type: %s ",
  						   tcon->nativeFileSystem);
  				}
  				seq_printf(m, "DevInfo: 0x%x Attributes: 0x%x"
  					"
  PathComponentMax: %d Status: 0x%d",
  					le32_to_cpu(tcon->fsDevInfo.DeviceCharacteristics),
  					le32_to_cpu(tcon->fsAttrInfo.Attributes),
  					le32_to_cpu(tcon->fsAttrInfo.MaxPathNameComponentLength),
  					tcon->tidStatus);
  				if (dev_type == FILE_DEVICE_DISK)
  					seq_puts(m, " type: DISK ");
  				else if (dev_type == FILE_DEVICE_CD_ROM)
  					seq_puts(m, " type: CDROM ");
  				else
  					seq_printf(m, " type: %d ", dev_type);
  
  				if (tcon->need_reconnect)
  					seq_puts(m, "\tDISCONNECTED ");
  				seq_putc(m, '
  ');
  			}
  
  			seq_puts(m, "
  \tMIDs:
  ");

  
  			spin_lock(&GlobalMid_Lock);

  			list_for_each(tmp3, &server->pending_mid_q) {

  				mid_entry = list_entry(tmp3, struct mid_q_entry,

  					qhead);

  				seq_printf(m, "\tState: %d com: %d pid:"

  						" %d cbdata: %p mid %d
  ",

  						mid_entry->midState,
  						(int)mid_entry->command,
  						mid_entry->pid,

  						mid_entry->callback_data,

  						mid_entry->mid);

  			}

  			spin_unlock(&GlobalMid_Lock);

  		}

  	}

  	spin_unlock(&cifs_tcp_ses_lock);

  	seq_putc(m, '
  ');

  	/* BB add code to dump additional info such as TCP session info now */

  	return 0;
  }

  static int cifs_debug_data_proc_open(struct inode *inode, struct file *file)
  {
  	return single_open(file, cifs_debug_data_proc_show, NULL);

  }

  static const struct file_operations cifs_debug_data_proc_fops = {
  	.owner		= THIS_MODULE,
  	.open		= cifs_debug_data_proc_open,
  	.read		= seq_read,
  	.llseek		= seq_lseek,
  	.release	= single_release,
  };

  #ifdef CONFIG_CIFS_STATS
  static ssize_t cifs_stats_proc_write(struct file *file,
  		const char __user *buffer, size_t count, loff_t *ppos)

  {

  	char c;
  	int rc;

  	struct list_head *tmp1, *tmp2, *tmp3;
  	struct TCP_Server_Info *server;

  	struct cifs_ses *ses;
  	struct cifs_tcon *tcon;

  	rc = get_user(c, buffer);
  	if (rc)
  		return rc;

  	if (c == '1' || c == 'y' || c == 'Y' || c == '0') {

  #ifdef CONFIG_CIFS_STATS2
  		atomic_set(&totBufAllocCount, 0);
  		atomic_set(&totSmBufAllocCount, 0);
  #endif /* CONFIG_CIFS_STATS2 */

  		spin_lock(&cifs_tcp_ses_lock);

  		list_for_each(tmp1, &cifs_tcp_ses_list) {
  			server = list_entry(tmp1, struct TCP_Server_Info,
  					    tcp_ses_list);

  			list_for_each(tmp2, &server->smb_ses_list) {

  				ses = list_entry(tmp2, struct cifs_ses,

  						 smb_ses_list);

  				list_for_each(tmp3, &ses->tcon_list) {
  					tcon = list_entry(tmp3,

  							  struct cifs_tcon,

  							  tcon_list);
  					atomic_set(&tcon->num_smbs_sent, 0);
  					atomic_set(&tcon->num_writes, 0);
  					atomic_set(&tcon->num_reads, 0);
  					atomic_set(&tcon->num_oplock_brks, 0);
  					atomic_set(&tcon->num_opens, 0);

  					atomic_set(&tcon->num_posixopens, 0);
  					atomic_set(&tcon->num_posixmkdirs, 0);

  					atomic_set(&tcon->num_closes, 0);
  					atomic_set(&tcon->num_deletes, 0);
  					atomic_set(&tcon->num_mkdirs, 0);
  					atomic_set(&tcon->num_rmdirs, 0);
  					atomic_set(&tcon->num_renames, 0);
  					atomic_set(&tcon->num_t2renames, 0);
  					atomic_set(&tcon->num_ffirst, 0);
  					atomic_set(&tcon->num_fnext, 0);
  					atomic_set(&tcon->num_fclose, 0);
  					atomic_set(&tcon->num_hardlinks, 0);
  					atomic_set(&tcon->num_symlinks, 0);
  					atomic_set(&tcon->num_locks, 0);
  				}
  			}

  		}

  		spin_unlock(&cifs_tcp_ses_lock);

  	}

  	return count;

  }

  static int cifs_stats_proc_show(struct seq_file *m, void *v)

  {

  	int i;

  	struct list_head *tmp1, *tmp2, *tmp3;
  	struct TCP_Server_Info *server;

  	struct cifs_ses *ses;
  	struct cifs_tcon *tcon;

  	seq_printf(m,

  			"Resources in use
  CIFS Session: %d
  ",
  			sesInfoAllocCount.counter);

  	seq_printf(m, "Share (unique mount targets): %d
  ",

  			tconInfoAllocCount.counter);

  	seq_printf(m, "SMB Request/Response Buffer: %d Pool size: %d
  ",

  			bufAllocCount.counter,
  			cifs_min_rcv + tcpSesAllocCount.counter);

  	seq_printf(m, "SMB Small Req/Resp Buffer: %d Pool size: %d
  ",

  			smBufAllocCount.counter, cifs_min_small);

  #ifdef CONFIG_CIFS_STATS2

  	seq_printf(m, "Total Large %d Small %d Allocations
  ",

  				atomic_read(&totBufAllocCount),

  				atomic_read(&totSmBufAllocCount));

  #endif /* CONFIG_CIFS_STATS2 */

  	seq_printf(m, "Operations (MIDs): %d
  ", atomic_read(&midCount));

  	seq_printf(m,

  		"
  %d session %d share reconnects
  ",

  		tcpSesReconnectCount.counter, tconInfoReconnectCount.counter);

  	seq_printf(m,

  		"Total vfs operations: %d maximum at one time: %d
  ",

  		GlobalCurrentXid, GlobalMaxActiveXid);

  
  	i = 0;

  	spin_lock(&cifs_tcp_ses_lock);

  	list_for_each(tmp1, &cifs_tcp_ses_list) {
  		server = list_entry(tmp1, struct TCP_Server_Info,
  				    tcp_ses_list);
  		list_for_each(tmp2, &server->smb_ses_list) {

  			ses = list_entry(tmp2, struct cifs_ses,

  					 smb_ses_list);
  			list_for_each(tmp3, &ses->tcon_list) {
  				tcon = list_entry(tmp3,

  						  struct cifs_tcon,

  						  tcon_list);
  				i++;
  				seq_printf(m, "
  %d) %s", i, tcon->treeName);
  				if (tcon->need_reconnect)
  					seq_puts(m, "\tDISCONNECTED ");
  				seq_printf(m, "
  SMBs: %d Oplock Breaks: %d",
  					atomic_read(&tcon->num_smbs_sent),
  					atomic_read(&tcon->num_oplock_brks));
  				seq_printf(m, "
  Reads:  %d Bytes: %lld",
  					atomic_read(&tcon->num_reads),
  					(long long)(tcon->bytes_read));
  				seq_printf(m, "
  Writes: %d Bytes: %lld",
  					atomic_read(&tcon->num_writes),
  					(long long)(tcon->bytes_written));

  				seq_printf(m, "
  Flushes: %d",
  					atomic_read(&tcon->num_flushes));

  				seq_printf(m, "
  Locks: %d HardLinks: %d "
  					      "Symlinks: %d",
  					atomic_read(&tcon->num_locks),
  					atomic_read(&tcon->num_hardlinks),
  					atomic_read(&tcon->num_symlinks));

  				seq_printf(m, "
  Opens: %d Closes: %d "

  					      "Deletes: %d",
  					atomic_read(&tcon->num_opens),
  					atomic_read(&tcon->num_closes),
  					atomic_read(&tcon->num_deletes));

  				seq_printf(m, "
  Posix Opens: %d "
  					      "Posix Mkdirs: %d",
  					atomic_read(&tcon->num_posixopens),
  					atomic_read(&tcon->num_posixmkdirs));

  				seq_printf(m, "
  Mkdirs: %d Rmdirs: %d",
  					atomic_read(&tcon->num_mkdirs),
  					atomic_read(&tcon->num_rmdirs));
  				seq_printf(m, "
  Renames: %d T2 Renames %d",
  					atomic_read(&tcon->num_renames),
  					atomic_read(&tcon->num_t2renames));
  				seq_printf(m, "
  FindFirst: %d FNext %d "
  					      "FClose %d",
  					atomic_read(&tcon->num_ffirst),
  					atomic_read(&tcon->num_fnext),
  					atomic_read(&tcon->num_fclose));
  			}
  		}

  	}

  	spin_unlock(&cifs_tcp_ses_lock);

  	seq_putc(m, '
  ');
  	return 0;
  }

  static int cifs_stats_proc_open(struct inode *inode, struct file *file)
  {
  	return single_open(file, cifs_stats_proc_show, NULL);

  }

  
  static const struct file_operations cifs_stats_proc_fops = {
  	.owner		= THIS_MODULE,
  	.open		= cifs_stats_proc_open,
  	.read		= seq_read,
  	.llseek		= seq_lseek,
  	.release	= single_release,
  	.write		= cifs_stats_proc_write,
  };

  #endif /* STATS */

  
  static struct proc_dir_entry *proc_fs_cifs;

  static const struct file_operations cifsFYI_proc_fops;
  static const struct file_operations cifs_oplock_proc_fops;
  static const struct file_operations cifs_lookup_cache_proc_fops;
  static const struct file_operations traceSMB_proc_fops;
  static const struct file_operations cifs_multiuser_mount_proc_fops;
  static const struct file_operations cifs_security_flags_proc_fops;

  static const struct file_operations cifs_linux_ext_proc_fops;

  
  void
  cifs_proc_init(void)
  {

  	proc_fs_cifs = proc_mkdir("fs/cifs", NULL);

  	if (proc_fs_cifs == NULL)
  		return;

  	proc_create("DebugData", 0, proc_fs_cifs, &cifs_debug_data_proc_fops);

  
  #ifdef CONFIG_CIFS_STATS

  	proc_create("Stats", 0, proc_fs_cifs, &cifs_stats_proc_fops);

  #endif /* STATS */

  	proc_create("cifsFYI", 0, proc_fs_cifs, &cifsFYI_proc_fops);
  	proc_create("traceSMB", 0, proc_fs_cifs, &traceSMB_proc_fops);
  	proc_create("OplockEnabled", 0, proc_fs_cifs, &cifs_oplock_proc_fops);

  	proc_create("LinuxExtensionsEnabled", 0, proc_fs_cifs,
  		    &cifs_linux_ext_proc_fops);
  	proc_create("MultiuserMount", 0, proc_fs_cifs,
  		    &cifs_multiuser_mount_proc_fops);
  	proc_create("SecurityFlags", 0, proc_fs_cifs,
  		    &cifs_security_flags_proc_fops);
  	proc_create("LookupCacheEnabled", 0, proc_fs_cifs,
  		    &cifs_lookup_cache_proc_fops);

  }
  
  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("SecurityFlags", proc_fs_cifs);

  	remove_proc_entry("LinuxExtensionsEnabled", proc_fs_cifs);

  	remove_proc_entry("LookupCacheEnabled", proc_fs_cifs);

  	remove_proc_entry("fs/cifs", NULL);

  }

  static int cifsFYI_proc_show(struct seq_file *m, void *v)

  {

  	seq_printf(m, "%d
  ", cifsFYI);
  	return 0;
  }

  static int cifsFYI_proc_open(struct inode *inode, struct file *file)
  {
  	return single_open(file, cifsFYI_proc_show, NULL);

  }

  
  static ssize_t cifsFYI_proc_write(struct file *file, const char __user *buffer,
  		size_t count, loff_t *ppos)

  {
  	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;

  	else if ((c > '1') && (c <= '9'))

  		cifsFYI = (int) (c - '0'); /* see cifs_debug.h for meanings */

  
  	return count;
  }

  static const struct file_operations cifsFYI_proc_fops = {
  	.owner		= THIS_MODULE,
  	.open		= cifsFYI_proc_open,
  	.read		= seq_read,
  	.llseek		= seq_lseek,
  	.release	= single_release,
  	.write		= cifsFYI_proc_write,
  };

  static int cifs_oplock_proc_show(struct seq_file *m, void *v)
  {

  	seq_printf(m, "%d
  ", enable_oplocks);

  	return 0;
  }

  static int cifs_oplock_proc_open(struct inode *inode, struct file *file)
  {
  	return single_open(file, cifs_oplock_proc_show, NULL);

  }

  
  static ssize_t cifs_oplock_proc_write(struct file *file,
  		const char __user *buffer, size_t count, loff_t *ppos)

  {
  	char c;
  	int rc;

  	printk(KERN_WARNING "CIFS: The /proc/fs/cifs/OplockEnabled interface "
  	       "will be removed in kernel version 3.4. Please migrate to "
  	       "using the 'enable_oplocks' module parameter in cifs.ko.
  ");

  	rc = get_user(c, buffer);
  	if (rc)
  		return rc;
  	if (c == '0' || c == 'n' || c == 'N')

  		enable_oplocks = false;

  	else if (c == '1' || c == 'y' || c == 'Y')

  		enable_oplocks = true;

  
  	return count;
  }

  static const struct file_operations cifs_oplock_proc_fops = {
  	.owner		= THIS_MODULE,
  	.open		= cifs_oplock_proc_open,
  	.read		= seq_read,
  	.llseek		= seq_lseek,
  	.release	= single_release,
  	.write		= cifs_oplock_proc_write,
  };

  static int cifs_linux_ext_proc_show(struct seq_file *m, void *v)
  {
  	seq_printf(m, "%d
  ", linuxExtEnabled);
  	return 0;
  }

  static int cifs_linux_ext_proc_open(struct inode *inode, struct file *file)
  {
  	return single_open(file, cifs_linux_ext_proc_show, NULL);

  }

  
  static ssize_t cifs_linux_ext_proc_write(struct file *file,
  		const char __user *buffer, size_t count, loff_t *ppos)

  {

  	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 const struct file_operations cifs_linux_ext_proc_fops = {
  	.owner		= THIS_MODULE,
  	.open		= cifs_linux_ext_proc_open,
  	.read		= seq_read,
  	.llseek		= seq_lseek,
  	.release	= single_release,
  	.write		= cifs_linux_ext_proc_write,
  };

  static int cifs_lookup_cache_proc_show(struct seq_file *m, void *v)

  {

  	seq_printf(m, "%d
  ", lookupCacheEnabled);
  	return 0;
  }

  static int cifs_lookup_cache_proc_open(struct inode *inode, struct file *file)
  {
  	return single_open(file, cifs_lookup_cache_proc_show, NULL);

  }

  
  static ssize_t cifs_lookup_cache_proc_write(struct file *file,
  		const char __user *buffer, size_t count, loff_t *ppos)

  {
  	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 const struct file_operations cifs_lookup_cache_proc_fops = {
  	.owner		= THIS_MODULE,
  	.open		= cifs_lookup_cache_proc_open,
  	.read		= seq_read,
  	.llseek		= seq_lseek,
  	.release	= single_release,
  	.write		= cifs_lookup_cache_proc_write,
  };

  static int traceSMB_proc_show(struct seq_file *m, void *v)
  {
  	seq_printf(m, "%d
  ", traceSMB);
  	return 0;
  }

  static int traceSMB_proc_open(struct inode *inode, struct file *file)
  {
  	return single_open(file, traceSMB_proc_show, NULL);

  }

  
  static ssize_t traceSMB_proc_write(struct file *file, const char __user *buffer,
  		size_t count, loff_t *ppos)

  {
  	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 const struct file_operations traceSMB_proc_fops = {
  	.owner		= THIS_MODULE,
  	.open		= traceSMB_proc_open,
  	.read		= seq_read,
  	.llseek		= seq_lseek,
  	.release	= single_release,
  	.write		= traceSMB_proc_write,
  };

  static int cifs_multiuser_mount_proc_show(struct seq_file *m, void *v)
  {
  	seq_printf(m, "%d
  ", multiuser_mount);
  	return 0;
  }

  static int cifs_multiuser_mount_proc_open(struct inode *inode, struct file *fh)

  {

  	return single_open(fh, cifs_multiuser_mount_proc_show, NULL);

  }

  
  static ssize_t cifs_multiuser_mount_proc_write(struct file *file,
  		const char __user *buffer, size_t count, loff_t *ppos)

  {
  	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 const struct file_operations cifs_multiuser_mount_proc_fops = {
  	.owner		= THIS_MODULE,
  	.open		= cifs_multiuser_mount_proc_open,
  	.read		= seq_read,
  	.llseek		= seq_lseek,
  	.release	= single_release,
  	.write		= cifs_multiuser_mount_proc_write,
  };

  static int cifs_security_flags_proc_show(struct seq_file *m, void *v)
  {

  	seq_printf(m, "0x%x
  ", global_secflags);

  	return 0;
  }

  static int cifs_security_flags_proc_open(struct inode *inode, struct file *file)
  {
  	return single_open(file, cifs_security_flags_proc_show, NULL);

  }

  
  static ssize_t cifs_security_flags_proc_write(struct file *file,
  		const char __user *buffer, size_t count, loff_t *ppos)

  {

  	unsigned int flags;
  	char flags_string[12];

  	char c;

  	if ((count < 1) || (count > 11))

  		return -EINVAL;

  	memset(flags_string, 0, 12);

  	if (copy_from_user(flags_string, buffer, count))

  		return -EFAULT;

  	if (count < 3) {

  		/* single char or single char followed by null */
  		c = flags_string[0];

  		if (c == '0' || c == 'n' || c == 'N') {

  			global_secflags = CIFSSEC_DEF; /* default */

  			return count;
  		} else if (c == '1' || c == 'y' || c == 'Y') {

  			global_secflags = CIFSSEC_MAX;

  			return count;
  		} else if (!isdigit(c)) {

  			cERROR(1, "invalid flag %c", c);

  			return -EINVAL;
  		}

  	}
  	/* else we have a number */
  
  	flags = simple_strtoul(flags_string, NULL, 0);

  	cFYI(1, "sec flags 0x%x", flags);

  	if (flags <= 0)  {

  		cERROR(1, "invalid security flags %s", flags_string);

  		return -EINVAL;
  	}

  	if (flags & ~CIFSSEC_MASK) {

  		cERROR(1, "attempt to set unsupported security flags 0x%x",
  			flags & ~CIFSSEC_MASK);

  		return -EINVAL;
  	}
  	/* flags look ok - update the global security flags for cifs module */

  	global_secflags = flags;
  	if (global_secflags & CIFSSEC_MUST_SIGN) {

  		/* requiring signing implies signing is allowed */

  		global_secflags |= CIFSSEC_MAY_SIGN;

  		cFYI(1, "packet signing now required");

  	} else if ((global_secflags & CIFSSEC_MAY_SIGN) == 0) {

  		cFYI(1, "packet signing disabled");

  	}
  	/* BB should we turn on MAY flags for other MUST options? */

  	return count;
  }

  
  static const struct file_operations cifs_security_flags_proc_fops = {
  	.owner		= THIS_MODULE,
  	.open		= cifs_security_flags_proc_open,
  	.read		= seq_read,
  	.llseek		= seq_lseek,
  	.release	= single_release,
  	.write		= cifs_security_flags_proc_write,
  };

  #else

  inline void cifs_proc_init(void)

  {
  }

  inline void cifs_proc_clean(void)

  {
  }
  #endif /* PROC_FS */