cifs_debug.c

Linux内核自带的cifs模块

static read_proc_t packet_signing_enabled_read;
static write_proc_t packet_signing_enabled_write;*/
static read_proc_t experimEnabled_read;
static write_proc_t experimEnabled_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
	pde = create_proc_read_entry("Stats", 0, proc_fs_cifs,
				cifs_stats_read, NULL);
	if (pde)
		pde->write_proc = cifs_stats_write;
#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,
				experimEnabled_read, NULL);
	if (pde)
		pde->write_proc = experimEnabled_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("SecurityFlags", 0, proc_fs_cifs,
				security_flags_read, NULL);
	if (pde)
		pde->write_proc = security_flags_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("SecurityFlags", 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;
	else if ((c > '1') && (c <= '9'))
		cifsFYI = (int) (c - '0'); /* see cifs_debug.h for meanings */

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

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

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

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

	if (len < 0)
		len = 0;

	return len;
}
static int
experimEnabled_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;
	else if (c == '2')
		experimEnabled = 2;

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

	len = sprintf(page, "0x%x\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
security_flags_write(struct file *file, const char __user *buffer,
			unsigned long count, void *data)
{
	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')
			extended_security = CIFSSEC_DEF; /* default */
		else if (c == '1' || c == 'y' || c == 'Y')
			extended_security = CIFSSEC_MAX;
		return count;
	}
	/* 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 */
	extended_security = flags;
	if (extended_security & CIFSSEC_MUST_SIGN) {
		/* requiring signing implies signing is allowed */
		extended_security |= CIFSSEC_MAY_SIGN;
		cFYI(1, ("packet signing now required"));
	} else if ((extended_security & CIFSSEC_MAY_SIGN) == 0) {
		cFYI(1, ("packet signing disabled"));
	}
	/* BB should we turn on MAY flags for other MUST options? */
	return count;
}
#endif