Initial import

1 files changed, 1893 insertions, 0 deletions

diff --git a/security/selinux/selinuxfs.c b/security/selinux/selinuxfs.c
new file mode 100644
index 000000000..3d2201413
--- /dev/null
+++ b/security/selinux/selinuxfs.c
@@ -0,0 +1,1893 @@
+/* Updated: Karl MacMillan <kmacmillan@tresys.com>
+ *
+ *	Added conditional policy language extensions
+ *
+ *  Updated: Hewlett-Packard <paul@paul-moore.com>
+ *
+ *	Added support for the policy capability bitmap
+ *
+ * Copyright (C) 2007 Hewlett-Packard Development Company, L.P.
+ * Copyright (C) 2003 - 2004 Tresys Technology, LLC
+ * Copyright (C) 2004 Red Hat, Inc., James Morris <jmorris@redhat.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, version 2.
+ */
+
+#include <linux/kernel.h>
+#include <linux/pagemap.h>
+#include <linux/slab.h>
+#include <linux/vmalloc.h>
+#include <linux/fs.h>
+#include <linux/mutex.h>
+#include <linux/init.h>
+#include <linux/string.h>
+#include <linux/security.h>
+#include <linux/major.h>
+#include <linux/seq_file.h>
+#include <linux/percpu.h>
+#include <linux/audit.h>
+#include <linux/uaccess.h>
+#include <linux/kobject.h>
+#include <linux/ctype.h>
+
+/* selinuxfs pseudo filesystem for exporting the security policy API.
+   Based on the proc code and the fs/nfsd/nfsctl.c code. */
+
+#include "flask.h"
+#include "avc.h"
+#include "avc_ss.h"
+#include "security.h"
+#include "objsec.h"
+#include "conditional.h"
+
+/* Policy capability filenames */
+static char *policycap_names[] = {
+	"network_peer_controls",
+	"open_perms",
+	"redhat1",
+	"always_check_network"
+};
+
+unsigned int selinux_checkreqprot = CONFIG_SECURITY_SELINUX_CHECKREQPROT_VALUE;
+
+static int __init checkreqprot_setup(char *str)
+{
+	unsigned long checkreqprot;
+	if (!kstrtoul(str, 0, &checkreqprot))
+		selinux_checkreqprot = checkreqprot ? 1 : 0;
+	return 1;
+}
+__setup("checkreqprot=", checkreqprot_setup);
+
+static DEFINE_MUTEX(sel_mutex);
+
+/* global data for booleans */
+static struct dentry *bool_dir;
+static int bool_num;
+static char **bool_pending_names;
+static int *bool_pending_values;
+
+/* global data for classes */
+static struct dentry *class_dir;
+static unsigned long last_class_ino;
+
+static char policy_opened;
+
+/* global data for policy capabilities */
+static struct dentry *policycap_dir;
+
+/* Check whether a task is allowed to use a security operation. */
+static int task_has_security(struct task_struct *tsk,
+			     u32 perms)
+{
+	const struct task_security_struct *tsec;
+	u32 sid = 0;
+
+	rcu_read_lock();
+	tsec = __task_cred(tsk)->security;
+	if (tsec)
+		sid = tsec->sid;
+	rcu_read_unlock();
+	if (!tsec)
+		return -EACCES;
+
+	return avc_has_perm(sid, SECINITSID_SECURITY,
+			    SECCLASS_SECURITY, perms, NULL);
+}
+
+enum sel_inos {
+	SEL_ROOT_INO = 2,
+	SEL_LOAD,	/* load policy */
+	SEL_ENFORCE,	/* get or set enforcing status */
+	SEL_CONTEXT,	/* validate context */
+	SEL_ACCESS,	/* compute access decision */
+	SEL_CREATE,	/* compute create labeling decision */
+	SEL_RELABEL,	/* compute relabeling decision */
+	SEL_USER,	/* compute reachable user contexts */
+	SEL_POLICYVERS,	/* return policy version for this kernel */
+	SEL_COMMIT_BOOLS, /* commit new boolean values */
+	SEL_MLS,	/* return if MLS policy is enabled */
+	SEL_DISABLE,	/* disable SELinux until next reboot */
+	SEL_MEMBER,	/* compute polyinstantiation membership decision */
+	SEL_CHECKREQPROT, /* check requested protection, not kernel-applied one */
+	SEL_COMPAT_NET,	/* whether to use old compat network packet controls */
+	SEL_REJECT_UNKNOWN, /* export unknown reject handling to userspace */
+	SEL_DENY_UNKNOWN, /* export unknown deny handling to userspace */
+	SEL_STATUS,	/* export current status using mmap() */
+	SEL_POLICY,	/* allow userspace to read the in kernel policy */
+	SEL_INO_NEXT,	/* The next inode number to use */
+};
+
+static unsigned long sel_last_ino = SEL_INO_NEXT - 1;
+
+#define SEL_INITCON_INO_OFFSET		0x01000000
+#define SEL_BOOL_INO_OFFSET		0x02000000
+#define SEL_CLASS_INO_OFFSET		0x04000000
+#define SEL_POLICYCAP_INO_OFFSET	0x08000000
+#define SEL_INO_MASK			0x00ffffff
+
+#define TMPBUFLEN	12
+static ssize_t sel_read_enforce(struct file *filp, char __user *buf,
+				size_t count, loff_t *ppos)
+{
+	char tmpbuf[TMPBUFLEN];
+	ssize_t length;
+
+	length = scnprintf(tmpbuf, TMPBUFLEN, "%d", selinux_enforcing);
+	return simple_read_from_buffer(buf, count, ppos, tmpbuf, length);
+}
+
+#ifdef CONFIG_SECURITY_SELINUX_DEVELOP
+static ssize_t sel_write_enforce(struct file *file, const char __user *buf,
+				 size_t count, loff_t *ppos)
+
+{
+	char *page = NULL;
+	ssize_t length;
+	int new_value;
+
+	length = -ENOMEM;
+	if (count >= PAGE_SIZE)
+		goto out;
+
+	/* No partial writes. */
+	length = -EINVAL;
+	if (*ppos != 0)
+		goto out;
+
+	length = -ENOMEM;
+	page = (char *)get_zeroed_page(GFP_KERNEL);
+	if (!page)
+		goto out;
+
+	length = -EFAULT;
+	if (copy_from_user(page, buf, count))
+		goto out;
+
+	length = -EINVAL;
+	if (sscanf(page, "%d", &new_value) != 1)
+		goto out;
+
+	if (new_value != selinux_enforcing) {
+		length = task_has_security(current, SECURITY__SETENFORCE);
+		if (length)
+			goto out;
+		audit_log(current->audit_context, GFP_KERNEL, AUDIT_MAC_STATUS,
+			"enforcing=%d old_enforcing=%d auid=%u ses=%u",
+			new_value, selinux_enforcing,
+			from_kuid(&init_user_ns, audit_get_loginuid(current)),
+			audit_get_sessionid(current));
+		selinux_enforcing = new_value;
+		if (selinux_enforcing)
+			avc_ss_reset(0);
+		selnl_notify_setenforce(selinux_enforcing);
+		selinux_status_update_setenforce(selinux_enforcing);
+	}
+	length = count;
+out:
+	free_page((unsigned long) page);
+	return length;
+}
+#else
+#define sel_write_enforce NULL
+#endif
+
+static const struct file_operations sel_enforce_ops = {
+	.read		= sel_read_enforce,
+	.write		= sel_write_enforce,
+	.llseek		= generic_file_llseek,
+};
+
+static ssize_t sel_read_handle_unknown(struct file *filp, char __user *buf,
+					size_t count, loff_t *ppos)
+{
+	char tmpbuf[TMPBUFLEN];
+	ssize_t length;
+	ino_t ino = file_inode(filp)->i_ino;
+	int handle_unknown = (ino == SEL_REJECT_UNKNOWN) ?
+		security_get_reject_unknown() : !security_get_allow_unknown();
+
+	length = scnprintf(tmpbuf, TMPBUFLEN, "%d", handle_unknown);
+	return simple_read_from_buffer(buf, count, ppos, tmpbuf, length);
+}
+
+static const struct file_operations sel_handle_unknown_ops = {
+	.read		= sel_read_handle_unknown,
+	.llseek		= generic_file_llseek,
+};
+
+static int sel_open_handle_status(struct inode *inode, struct file *filp)
+{
+	struct page    *status = selinux_kernel_status_page();
+
+	if (!status)
+		return -ENOMEM;
+
+	filp->private_data = status;
+
+	return 0;
+}
+
+static ssize_t sel_read_handle_status(struct file *filp, char __user *buf,
+				      size_t count, loff_t *ppos)
+{
+	struct page    *status = filp->private_data;
+
+	BUG_ON(!status);
+
+	return simple_read_from_buffer(buf, count, ppos,
+				       page_address(status),
+				       sizeof(struct selinux_kernel_status));
+}
+
+static int sel_mmap_handle_status(struct file *filp,
+				  struct vm_area_struct *vma)
+{
+	struct page    *status = filp->private_data;
+	unsigned long	size = vma->vm_end - vma->vm_start;
+
+	BUG_ON(!status);
+
+	/* only allows one page from the head */
+	if (vma->vm_pgoff > 0 || size != PAGE_SIZE)
+		return -EIO;
+	/* disallow writable mapping */
+	if (vma->vm_flags & VM_WRITE)
+		return -EPERM;
+	/* disallow mprotect() turns it into writable */
+	vma->vm_flags &= ~VM_MAYWRITE;
+
+	return remap_pfn_range(vma, vma->vm_start,
+			       page_to_pfn(status),
+			       size, vma->vm_page_prot);
+}
+
+static const struct file_operations sel_handle_status_ops = {
+	.open		= sel_open_handle_status,
+	.read		= sel_read_handle_status,
+	.mmap		= sel_mmap_handle_status,
+	.llseek		= generic_file_llseek,
+};
+
+#ifdef CONFIG_SECURITY_SELINUX_DISABLE
+static ssize_t sel_write_disable(struct file *file, const char __user *buf,
+				 size_t count, loff_t *ppos)
+
+{
+	char *page = NULL;
+	ssize_t length;
+	int new_value;
+
+	length = -ENOMEM;
+	if (count >= PAGE_SIZE)
+		goto out;
+
+	/* No partial writes. */
+	length = -EINVAL;
+	if (*ppos != 0)
+		goto out;
+
+	length = -ENOMEM;
+	page = (char *)get_zeroed_page(GFP_KERNEL);
+	if (!page)
+		goto out;
+
+	length = -EFAULT;
+	if (copy_from_user(page, buf, count))
+		goto out;
+
+	length = -EINVAL;
+	if (sscanf(page, "%d", &new_value) != 1)
+		goto out;
+
+	if (new_value) {
+		length = selinux_disable();
+		if (length)
+			goto out;
+		audit_log(current->audit_context, GFP_KERNEL, AUDIT_MAC_STATUS,
+			"selinux=0 auid=%u ses=%u",
+			from_kuid(&init_user_ns, audit_get_loginuid(current)),
+			audit_get_sessionid(current));
+	}
+
+	length = count;
+out:
+	free_page((unsigned long) page);
+	return length;
+}
+#else
+#define sel_write_disable NULL
+#endif
+
+static const struct file_operations sel_disable_ops = {
+	.write		= sel_write_disable,
+	.llseek		= generic_file_llseek,
+};
+
+static ssize_t sel_read_policyvers(struct file *filp, char __user *buf,
+				   size_t count, loff_t *ppos)
+{
+	char tmpbuf[TMPBUFLEN];
+	ssize_t length;
+
+	length = scnprintf(tmpbuf, TMPBUFLEN, "%u", POLICYDB_VERSION_MAX);
+	return simple_read_from_buffer(buf, count, ppos, tmpbuf, length);
+}
+
+static const struct file_operations sel_policyvers_ops = {
+	.read		= sel_read_policyvers,
+	.llseek		= generic_file_llseek,
+};
+
+/* declaration for sel_write_load */
+static int sel_make_bools(void);
+static int sel_make_classes(void);
+static int sel_make_policycap(void);
+
+/* declaration for sel_make_class_dirs */
+static struct dentry *sel_make_dir(struct dentry *dir, const char *name,
+			unsigned long *ino);
+
+static ssize_t sel_read_mls(struct file *filp, char __user *buf,
+				size_t count, loff_t *ppos)
+{
+	char tmpbuf[TMPBUFLEN];
+	ssize_t length;
+
+	length = scnprintf(tmpbuf, TMPBUFLEN, "%d",
+			   security_mls_enabled());
+	return simple_read_from_buffer(buf, count, ppos, tmpbuf, length);
+}
+
+static const struct file_operations sel_mls_ops = {
+	.read		= sel_read_mls,
+	.llseek		= generic_file_llseek,
+};
+
+struct policy_load_memory {
+	size_t len;
+	void *data;
+};
+
+static int sel_open_policy(struct inode *inode, struct file *filp)
+{
+	struct policy_load_memory *plm = NULL;
+	int rc;
+
+	BUG_ON(filp->private_data);
+
+	mutex_lock(&sel_mutex);
+
+	rc = task_has_security(current, SECURITY__READ_POLICY);
+	if (rc)
+		goto err;
+
+	rc = -EBUSY;
+	if (policy_opened)
+		goto err;
+
+	rc = -ENOMEM;
+	plm = kzalloc(sizeof(*plm), GFP_KERNEL);
+	if (!plm)
+		goto err;
+
+	if (i_size_read(inode) != security_policydb_len()) {
+		mutex_lock(&inode->i_mutex);
+		i_size_write(inode, security_policydb_len());
+		mutex_unlock(&inode->i_mutex);
+	}
+
+	rc = security_read_policy(&plm->data, &plm->len);
+	if (rc)
+		goto err;
+
+	policy_opened = 1;
+
+	filp->private_data = plm;
+
+	mutex_unlock(&sel_mutex);
+
+	return 0;
+err:
+	mutex_unlock(&sel_mutex);
+
+	if (plm)
+		vfree(plm->data);
+	kfree(plm);
+	return rc;
+}
+
+static int sel_release_policy(struct inode *inode, struct file *filp)
+{
+	struct policy_load_memory *plm = filp->private_data;
+
+	BUG_ON(!plm);
+
+	policy_opened = 0;
+
+	vfree(plm->data);
+	kfree(plm);
+
+	return 0;
+}
+
+static ssize_t sel_read_policy(struct file *filp, char __user *buf,
+			       size_t count, loff_t *ppos)
+{
+	struct policy_load_memory *plm = filp->private_data;
+	int ret;
+
+	mutex_lock(&sel_mutex);
+
+	ret = task_has_security(current, SECURITY__READ_POLICY);
+	if (ret)
+		goto out;
+
+	ret = simple_read_from_buffer(buf, count, ppos, plm->data, plm->len);
+out:
+	mutex_unlock(&sel_mutex);
+	return ret;
+}
+
+static int sel_mmap_policy_fault(struct vm_area_struct *vma,
+				 struct vm_fault *vmf)
+{
+	struct policy_load_memory *plm = vma->vm_file->private_data;
+	unsigned long offset;
+	struct page *page;
+
+	if (vmf->flags & (FAULT_FLAG_MKWRITE | FAULT_FLAG_WRITE))
+		return VM_FAULT_SIGBUS;
+
+	offset = vmf->pgoff << PAGE_SHIFT;
+	if (offset >= roundup(plm->len, PAGE_SIZE))
+		return VM_FAULT_SIGBUS;
+
+	page = vmalloc_to_page(plm->data + offset);
+	get_page(page);
+
+	vmf->page = page;
+
+	return 0;
+}
+
+static struct vm_operations_struct sel_mmap_policy_ops = {
+	.fault = sel_mmap_policy_fault,
+	.page_mkwrite = sel_mmap_policy_fault,
+};
+
+static int sel_mmap_policy(struct file *filp, struct vm_area_struct *vma)
+{
+	if (vma->vm_flags & VM_SHARED) {
+		/* do not allow mprotect to make mapping writable */
+		vma->vm_flags &= ~VM_MAYWRITE;
+
+		if (vma->vm_flags & VM_WRITE)
+			return -EACCES;
+	}
+
+	vma->vm_flags |= VM_DONTEXPAND | VM_DONTDUMP;
+	vma->vm_ops = &sel_mmap_policy_ops;
+
+	return 0;
+}
+
+static const struct file_operations sel_policy_ops = {
+	.open		= sel_open_policy,
+	.read		= sel_read_policy,
+	.mmap		= sel_mmap_policy,
+	.release	= sel_release_policy,
+	.llseek		= generic_file_llseek,
+};
+
+static ssize_t sel_write_load(struct file *file, const char __user *buf,
+			      size_t count, loff_t *ppos)
+
+{
+	ssize_t length;
+	void *data = NULL;
+
+	mutex_lock(&sel_mutex);
+
+	length = task_has_security(current, SECURITY__LOAD_POLICY);
+	if (length)
+		goto out;
+
+	/* No partial writes. */
+	length = -EINVAL;
+	if (*ppos != 0)
+		goto out;
+
+	length = -EFBIG;
+	if (count > 64 * 1024 * 1024)
+		goto out;
+
+	length = -ENOMEM;
+	data = vmalloc(count);
+	if (!data)
+		goto out;
+
+	length = -EFAULT;
+	if (copy_from_user(data, buf, count) != 0)
+		goto out;
+
+	length = security_load_policy(data, count);
+	if (length)
+		goto out;
+
+	length = sel_make_bools();
+	if (length)
+		goto out1;
+
+	length = sel_make_classes();
+	if (length)
+		goto out1;
+
+	length = sel_make_policycap();
+	if (length)
+		goto out1;
+
+	length = count;
+
+out1:
+	audit_log(current->audit_context, GFP_KERNEL, AUDIT_MAC_POLICY_LOAD,
+		"policy loaded auid=%u ses=%u",
+		from_kuid(&init_user_ns, audit_get_loginuid(current)),
+		audit_get_sessionid(current));
+out:
+	mutex_unlock(&sel_mutex);
+	vfree(data);
+	return length;
+}
+
+static const struct file_operations sel_load_ops = {
+	.write		= sel_write_load,
+	.llseek		= generic_file_llseek,
+};
+
+static ssize_t sel_write_context(struct file *file, char *buf, size_t size)
+{
+	char *canon = NULL;
+	u32 sid, len;
+	ssize_t length;
+
+	length = task_has_security(current, SECURITY__CHECK_CONTEXT);
+	if (length)
+		goto out;
+
+	length = security_context_to_sid(buf, size, &sid, GFP_KERNEL);
+	if (length)
+		goto out;
+
+	length = security_sid_to_context(sid, &canon, &len);
+	if (length)
+		goto out;
+
+	length = -ERANGE;
+	if (len > SIMPLE_TRANSACTION_LIMIT) {
+		printk(KERN_ERR "SELinux: %s:  context size (%u) exceeds "
+			"payload max\n", __func__, len);
+		goto out;
+	}
+
+	memcpy(buf, canon, len);
+	length = len;
+out:
+	kfree(canon);
+	return length;
+}
+
+static ssize_t sel_read_checkreqprot(struct file *filp, char __user *buf,
+				     size_t count, loff_t *ppos)
+{
+	char tmpbuf[TMPBUFLEN];
+	ssize_t length;
+
+	length = scnprintf(tmpbuf, TMPBUFLEN, "%u", selinux_checkreqprot);
+	return simple_read_from_buffer(buf, count, ppos, tmpbuf, length);
+}
+
+static ssize_t sel_write_checkreqprot(struct file *file, const char __user *buf,
+				      size_t count, loff_t *ppos)
+{
+	char *page = NULL;
+	ssize_t length;
+	unsigned int new_value;
+
+	length = task_has_security(current, SECURITY__SETCHECKREQPROT);
+	if (length)
+		goto out;
+
+	length = -ENOMEM;
+	if (count >= PAGE_SIZE)
+		goto out;
+
+	/* No partial writes. */
+	length = -EINVAL;
+	if (*ppos != 0)
+		goto out;
+
+	length = -ENOMEM;
+	page = (char *)get_zeroed_page(GFP_KERNEL);
+	if (!page)
+		goto out;
+
+	length = -EFAULT;
+	if (copy_from_user(page, buf, count))
+		goto out;
+
+	length = -EINVAL;
+	if (sscanf(page, "%u", &new_value) != 1)
+		goto out;
+
+	selinux_checkreqprot = new_value ? 1 : 0;
+	length = count;
+out:
+	free_page((unsigned long) page);
+	return length;
+}
+static const struct file_operations sel_checkreqprot_ops = {
+	.read		= sel_read_checkreqprot,
+	.write		= sel_write_checkreqprot,
+	.llseek		= generic_file_llseek,
+};
+
+/*
+ * Remaining nodes use transaction based IO methods like nfsd/nfsctl.c
+ */
+static ssize_t sel_write_access(struct file *file, char *buf, size_t size);
+static ssize_t sel_write_create(struct file *file, char *buf, size_t size);
+static ssize_t sel_write_relabel(struct file *file, char *buf, size_t size);
+static ssize_t sel_write_user(struct file *file, char *buf, size_t size);
+static ssize_t sel_write_member(struct file *file, char *buf, size_t size);
+
+static ssize_t (*write_op[])(struct file *, char *, size_t) = {
+	[SEL_ACCESS] = sel_write_access,
+	[SEL_CREATE] = sel_write_create,
+	[SEL_RELABEL] = sel_write_relabel,
+	[SEL_USER] = sel_write_user,
+	[SEL_MEMBER] = sel_write_member,
+	[SEL_CONTEXT] = sel_write_context,
+};
+
+static ssize_t selinux_transaction_write(struct file *file, const char __user *buf, size_t size, loff_t *pos)
+{
+	ino_t ino = file_inode(file)->i_ino;
+	char *data;
+	ssize_t rv;
+
+	if (ino >= ARRAY_SIZE(write_op) || !write_op[ino])
+		return -EINVAL;
+
+	data = simple_transaction_get(file, buf, size);
+	if (IS_ERR(data))
+		return PTR_ERR(data);
+
+	rv = write_op[ino](file, data, size);
+	if (rv > 0) {
+		simple_transaction_set(file, rv);
+		rv = size;
+	}
+	return rv;
+}
+
+static const struct file_operations transaction_ops = {
+	.write		= selinux_transaction_write,
+	.read		= simple_transaction_read,
+	.release	= simple_transaction_release,
+	.llseek		= generic_file_llseek,
+};
+
+/*
+ * payload - write methods
+ * If the method has a response, the response should be put in buf,
+ * and the length returned.  Otherwise return 0 or and -error.
+ */
+
+static ssize_t sel_write_access(struct file *file, char *buf, size_t size)
+{
+	char *scon = NULL, *tcon = NULL;
+	u32 ssid, tsid;
+	u16 tclass;
+	struct av_decision avd;
+	ssize_t length;
+
+	length = task_has_security(current, SECURITY__COMPUTE_AV);
+	if (length)
+		goto out;
+
+	length = -ENOMEM;
+	scon = kzalloc(size + 1, GFP_KERNEL);
+	if (!scon)
+		goto out;
+
+	length = -ENOMEM;
+	tcon = kzalloc(size + 1, GFP_KERNEL);
+	if (!tcon)
+		goto out;
+
+	length = -EINVAL;
+	if (sscanf(buf, "%s %s %hu", scon, tcon, &tclass) != 3)
+		goto out;
+
+	length = security_context_to_sid(scon, strlen(scon) + 1, &ssid,
+					 GFP_KERNEL);
+	if (length)
+		goto out;
+
+	length = security_context_to_sid(tcon, strlen(tcon) + 1, &tsid,
+					 GFP_KERNEL);
+	if (length)
+		goto out;
+
+	security_compute_av_user(ssid, tsid, tclass, &avd);
+
+	length = scnprintf(buf, SIMPLE_TRANSACTION_LIMIT,
+			  "%x %x %x %x %u %x",
+			  avd.allowed, 0xffffffff,
+			  avd.auditallow, avd.auditdeny,
+			  avd.seqno, avd.flags);
+out:
+	kfree(tcon);
+	kfree(scon);
+	return length;
+}
+
+static ssize_t sel_write_create(struct file *file, char *buf, size_t size)
+{
+	char *scon = NULL, *tcon = NULL;
+	char *namebuf = NULL, *objname = NULL;
+	u32 ssid, tsid, newsid;
+	u16 tclass;
+	ssize_t length;
+	char *newcon = NULL;
+	u32 len;
+	int nargs;
+
+	length = task_has_security(current, SECURITY__COMPUTE_CREATE);
+	if (length)
+		goto out;
+
+	length = -ENOMEM;
+	scon = kzalloc(size + 1, GFP_KERNEL);
+	if (!scon)
+		goto out;
+
+	length = -ENOMEM;
+	tcon = kzalloc(size + 1, GFP_KERNEL);
+	if (!tcon)
+		goto out;
+
+	length = -ENOMEM;
+	namebuf = kzalloc(size + 1, GFP_KERNEL);
+	if (!namebuf)
+		goto out;
+
+	length = -EINVAL;
+	nargs = sscanf(buf, "%s %s %hu %s", scon, tcon, &tclass, namebuf);
+	if (nargs < 3 || nargs > 4)
+		goto out;
+	if (nargs == 4) {
+		/*
+		 * If and when the name of new object to be queried contains
+		 * either whitespace or multibyte characters, they shall be
+		 * encoded based on the percentage-encoding rule.
+		 * If not encoded, the sscanf logic picks up only left-half
+		 * of the supplied name; splitted by a whitespace unexpectedly.
+		 */
+		char   *r, *w;
+		int     c1, c2;
+
+		r = w = namebuf;
+		do {
+			c1 = *r++;
+			if (c1 == '+')
+				c1 = ' ';
+			else if (c1 == '%') {
+				c1 = hex_to_bin(*r++);
+				if (c1 < 0)
+					goto out;
+				c2 = hex_to_bin(*r++);
+				if (c2 < 0)
+					goto out;
+				c1 = (c1 << 4) | c2;
+			}
+			*w++ = c1;
+		} while (c1 != '\0');
+
+		objname = namebuf;
+	}
+
+	length = security_context_to_sid(scon, strlen(scon) + 1, &ssid,
+					 GFP_KERNEL);
+	if (length)
+		goto out;
+
+	length = security_context_to_sid(tcon, strlen(tcon) + 1, &tsid,
+					 GFP_KERNEL);
+	if (length)
+		goto out;
+
+	length = security_transition_sid_user(ssid, tsid, tclass,
+					      objname, &newsid);
+	if (length)
+		goto out;
+
+	length = security_sid_to_context(newsid, &newcon, &len);
+	if (length)
+		goto out;
+
+	length = -ERANGE;
+	if (len > SIMPLE_TRANSACTION_LIMIT) {
+		printk(KERN_ERR "SELinux: %s:  context size (%u) exceeds "
+			"payload max\n", __func__, len);
+		goto out;
+	}
+
+	memcpy(buf, newcon, len);
+	length = len;
+out:
+	kfree(newcon);
+	kfree(namebuf);
+	kfree(tcon);
+	kfree(scon);
+	return length;
+}
+
+static ssize_t sel_write_relabel(struct file *file, char *buf, size_t size)
+{
+	char *scon = NULL, *tcon = NULL;
+	u32 ssid, tsid, newsid;
+	u16 tclass;
+	ssize_t length;
+	char *newcon = NULL;
+	u32 len;
+
+	length = task_has_security(current, SECURITY__COMPUTE_RELABEL);
+	if (length)
+		goto out;
+
+	length = -ENOMEM;
+	scon = kzalloc(size + 1, GFP_KERNEL);
+	if (!scon)
+		goto out;
+
+	length = -ENOMEM;
+	tcon = kzalloc(size + 1, GFP_KERNEL);
+	if (!tcon)
+		goto out;
+
+	length = -EINVAL;
+	if (sscanf(buf, "%s %s %hu", scon, tcon, &tclass) != 3)
+		goto out;
+
+	length = security_context_to_sid(scon, strlen(scon) + 1, &ssid,
+					 GFP_KERNEL);
+	if (length)
+		goto out;
+
+	length = security_context_to_sid(tcon, strlen(tcon) + 1, &tsid,
+					 GFP_KERNEL);
+	if (length)
+		goto out;
+
+	length = security_change_sid(ssid, tsid, tclass, &newsid);
+	if (length)
+		goto out;
+
+	length = security_sid_to_context(newsid, &newcon, &len);
+	if (length)
+		goto out;
+
+	length = -ERANGE;
+	if (len > SIMPLE_TRANSACTION_LIMIT)
+		goto out;
+
+	memcpy(buf, newcon, len);
+	length = len;
+out:
+	kfree(newcon);
+	kfree(tcon);
+	kfree(scon);
+	return length;
+}
+
+static ssize_t sel_write_user(struct file *file, char *buf, size_t size)
+{
+	char *con = NULL, *user = NULL, *ptr;
+	u32 sid, *sids = NULL;
+	ssize_t length;
+	char *newcon;
+	int i, rc;
+	u32 len, nsids;
+
+	length = task_has_security(current, SECURITY__COMPUTE_USER);
+	if (length)
+		goto out;
+
+	length = -ENOMEM;
+	con = kzalloc(size + 1, GFP_KERNEL);
+	if (!con)
+		goto out;
+
+	length = -ENOMEM;
+	user = kzalloc(size + 1, GFP_KERNEL);
+	if (!user)
+		goto out;
+
+	length = -EINVAL;
+	if (sscanf(buf, "%s %s", con, user) != 2)
+		goto out;
+
+	length = security_context_to_sid(con, strlen(con) + 1, &sid, GFP_KERNEL);
+	if (length)
+		goto out;
+
+	length = security_get_user_sids(sid, user, &sids, &nsids);
+	if (length)
+		goto out;
+
+	length = sprintf(buf, "%u", nsids) + 1;
+	ptr = buf + length;
+	for (i = 0; i < nsids; i++) {
+		rc = security_sid_to_context(sids[i], &newcon, &len);
+		if (rc) {
+			length = rc;
+			goto out;
+		}
+		if ((length + len) >= SIMPLE_TRANSACTION_LIMIT) {
+			kfree(newcon);
+			length = -ERANGE;
+			goto out;
+		}
+		memcpy(ptr, newcon, len);
+		kfree(newcon);
+		ptr += len;
+		length += len;
+	}
+out:
+	kfree(sids);
+	kfree(user);
+	kfree(con);
+	return length;
+}
+
+static ssize_t sel_write_member(struct file *file, char *buf, size_t size)
+{
+	char *scon = NULL, *tcon = NULL;
+	u32 ssid, tsid, newsid;
+	u16 tclass;
+	ssize_t length;
+	char *newcon = NULL;
+	u32 len;
+
+	length = task_has_security(current, SECURITY__COMPUTE_MEMBER);
+	if (length)
+		goto out;
+
+	length = -ENOMEM;
+	scon = kzalloc(size + 1, GFP_KERNEL);
+	if (!scon)
+		goto out;
+
+	length = -ENOMEM;
+	tcon = kzalloc(size + 1, GFP_KERNEL);
+	if (!tcon)
+		goto out;
+
+	length = -EINVAL;
+	if (sscanf(buf, "%s %s %hu", scon, tcon, &tclass) != 3)
+		goto out;
+
+	length = security_context_to_sid(scon, strlen(scon) + 1, &ssid,
+					 GFP_KERNEL);
+	if (length)
+		goto out;
+
+	length = security_context_to_sid(tcon, strlen(tcon) + 1, &tsid,
+					 GFP_KERNEL);
+	if (length)
+		goto out;
+
+	length = security_member_sid(ssid, tsid, tclass, &newsid);
+	if (length)
+		goto out;
+
+	length = security_sid_to_context(newsid, &newcon, &len);
+	if (length)
+		goto out;
+
+	length = -ERANGE;
+	if (len > SIMPLE_TRANSACTION_LIMIT) {
+		printk(KERN_ERR "SELinux: %s:  context size (%u) exceeds "
+			"payload max\n", __func__, len);
+		goto out;
+	}
+
+	memcpy(buf, newcon, len);
+	length = len;
+out:
+	kfree(newcon);
+	kfree(tcon);
+	kfree(scon);
+	return length;
+}
+
+static struct inode *sel_make_inode(struct super_block *sb, int mode)
+{
+	struct inode *ret = new_inode(sb);
+
+	if (ret) {
+		ret->i_mode = mode;
+		ret->i_atime = ret->i_mtime = ret->i_ctime = CURRENT_TIME;
+	}
+	return ret;
+}
+
+static ssize_t sel_read_bool(struct file *filep, char __user *buf,
+			     size_t count, loff_t *ppos)
+{
+	char *page = NULL;
+	ssize_t length;
+	ssize_t ret;
+	int cur_enforcing;
+	unsigned index = file_inode(filep)->i_ino & SEL_INO_MASK;
+	const char *name = filep->f_path.dentry->d_name.name;
+
+	mutex_lock(&sel_mutex);
+
+	ret = -EINVAL;
+	if (index >= bool_num || strcmp(name, bool_pending_names[index]))
+		goto out;
+
+	ret = -ENOMEM;
+	page = (char *)get_zeroed_page(GFP_KERNEL);
+	if (!page)
+		goto out;
+
+	cur_enforcing = security_get_bool_value(index);
+	if (cur_enforcing < 0) {
+		ret = cur_enforcing;
+		goto out;
+	}
+	length = scnprintf(page, PAGE_SIZE, "%d %d", cur_enforcing,
+			  bool_pending_values[index]);
+	ret = simple_read_from_buffer(buf, count, ppos, page, length);
+out:
+	mutex_unlock(&sel_mutex);
+	free_page((unsigned long)page);
+	return ret;
+}
+
+static ssize_t sel_write_bool(struct file *filep, const char __user *buf,
+			      size_t count, loff_t *ppos)
+{
+	char *page = NULL;
+	ssize_t length;
+	int new_value;
+	unsigned index = file_inode(filep)->i_ino & SEL_INO_MASK;
+	const char *name = filep->f_path.dentry->d_name.name;
+
+	mutex_lock(&sel_mutex);
+
+	length = task_has_security(current, SECURITY__SETBOOL);
+	if (length)
+		goto out;
+
+	length = -EINVAL;
+	if (index >= bool_num || strcmp(name, bool_pending_names[index]))
+		goto out;
+
+	length = -ENOMEM;
+	if (count >= PAGE_SIZE)
+		goto out;
+
+	/* No partial writes. */
+	length = -EINVAL;
+	if (*ppos != 0)
+		goto out;
+
+	length = -ENOMEM;
+	page = (char *)get_zeroed_page(GFP_KERNEL);
+	if (!page)
+		goto out;
+
+	length = -EFAULT;
+	if (copy_from_user(page, buf, count))
+		goto out;
+
+	length = -EINVAL;
+	if (sscanf(page, "%d", &new_value) != 1)
+		goto out;
+
+	if (new_value)
+		new_value = 1;
+
+	bool_pending_values[index] = new_value;
+	length = count;
+
+out:
+	mutex_unlock(&sel_mutex);
+	free_page((unsigned long) page);
+	return length;
+}
+
+static const struct file_operations sel_bool_ops = {
+	.read		= sel_read_bool,
+	.write		= sel_write_bool,
+	.llseek		= generic_file_llseek,
+};
+
+static ssize_t sel_commit_bools_write(struct file *filep,
+				      const char __user *buf,
+				      size_t count, loff_t *ppos)
+{
+	char *page = NULL;
+	ssize_t length;
+	int new_value;
+
+	mutex_lock(&sel_mutex);
+
+	length = task_has_security(current, SECURITY__SETBOOL);
+	if (length)
+		goto out;
+
+	length = -ENOMEM;
+	if (count >= PAGE_SIZE)
+		goto out;
+
+	/* No partial writes. */
+	length = -EINVAL;
+	if (*ppos != 0)
+		goto out;
+
+	length = -ENOMEM;
+	page = (char *)get_zeroed_page(GFP_KERNEL);
+	if (!page)
+		goto out;
+
+	length = -EFAULT;
+	if (copy_from_user(page, buf, count))
+		goto out;
+
+	length = -EINVAL;
+	if (sscanf(page, "%d", &new_value) != 1)
+		goto out;
+
+	length = 0;
+	if (new_value && bool_pending_values)
+		length = security_set_bools(bool_num, bool_pending_values);
+
+	if (!length)
+		length = count;
+
+out:
+	mutex_unlock(&sel_mutex);
+	free_page((unsigned long) page);
+	return length;
+}
+
+static const struct file_operations sel_commit_bools_ops = {
+	.write		= sel_commit_bools_write,
+	.llseek		= generic_file_llseek,
+};
+
+static void sel_remove_entries(struct dentry *de)
+{
+	d_genocide(de);
+	shrink_dcache_parent(de);
+}
+
+#define BOOL_DIR_NAME "booleans"
+
+static int sel_make_bools(void)
+{
+	int i, ret;
+	ssize_t len;
+	struct dentry *dentry = NULL;
+	struct dentry *dir = bool_dir;
+	struct inode *inode = NULL;
+	struct inode_security_struct *isec;
+	char **names = NULL, *page;
+	int num;
+	int *values = NULL;
+	u32 sid;
+
+	/* remove any existing files */
+	for (i = 0; i < bool_num; i++)
+		kfree(bool_pending_names[i]);
+	kfree(bool_pending_names);
+	kfree(bool_pending_values);
+	bool_num = 0;
+	bool_pending_names = NULL;
+	bool_pending_values = NULL;
+
+	sel_remove_entries(dir);
+
+	ret = -ENOMEM;
+	page = (char *)get_zeroed_page(GFP_KERNEL);
+	if (!page)
+		goto out;
+
+	ret = security_get_bools(&num, &names, &values);
+	if (ret)
+		goto out;
+
+	for (i = 0; i < num; i++) {
+		ret = -ENOMEM;
+		dentry = d_alloc_name(dir, names[i]);
+		if (!dentry)
+			goto out;
+
+		ret = -ENOMEM;
+		inode = sel_make_inode(dir->d_sb, S_IFREG | S_IRUGO | S_IWUSR);
+		if (!inode)
+			goto out;
+
+		ret = -ENAMETOOLONG;
+		len = snprintf(page, PAGE_SIZE, "/%s/%s", BOOL_DIR_NAME, names[i]);
+		if (len >= PAGE_SIZE)
+			goto out;
+
+		isec = (struct inode_security_struct *)inode->i_security;
+		ret = security_genfs_sid("selinuxfs", page, SECCLASS_FILE, &sid);
+		if (ret)
+			goto out;
+
+		isec->sid = sid;
+		isec->initialized = 1;
+		inode->i_fop = &sel_bool_ops;
+		inode->i_ino = i|SEL_BOOL_INO_OFFSET;
+		d_add(dentry, inode);
+	}
+	bool_num = num;
+	bool_pending_names = names;
+	bool_pending_values = values;
+
+	free_page((unsigned long)page);
+	return 0;
+out:
+	free_page((unsigned long)page);
+
+	if (names) {
+		for (i = 0; i < num; i++)
+			kfree(names[i]);
+		kfree(names);
+	}
+	kfree(values);
+	sel_remove_entries(dir);
+
+	return ret;
+}
+
+#define NULL_FILE_NAME "null"
+
+struct path selinux_null;
+
+static ssize_t sel_read_avc_cache_threshold(struct file *filp, char __user *buf,
+					    size_t count, loff_t *ppos)
+{
+	char tmpbuf[TMPBUFLEN];
+	ssize_t length;
+
+	length = scnprintf(tmpbuf, TMPBUFLEN, "%u", avc_cache_threshold);
+	return simple_read_from_buffer(buf, count, ppos, tmpbuf, length);
+}
+
+static ssize_t sel_write_avc_cache_threshold(struct file *file,
+					     const char __user *buf,
+					     size_t count, loff_t *ppos)
+
+{
+	char *page = NULL;
+	ssize_t ret;
+	int new_value;
+
+	ret = task_has_security(current, SECURITY__SETSECPARAM);
+	if (ret)
+		goto out;
+
+	ret = -ENOMEM;
+	if (count >= PAGE_SIZE)
+		goto out;
+
+	/* No partial writes. */
+	ret = -EINVAL;
+	if (*ppos != 0)
+		goto out;
+
+	ret = -ENOMEM;
+	page = (char *)get_zeroed_page(GFP_KERNEL);
+	if (!page)
+		goto out;
+
+	ret = -EFAULT;
+	if (copy_from_user(page, buf, count))
+		goto out;
+
+	ret = -EINVAL;
+	if (sscanf(page, "%u", &new_value) != 1)
+		goto out;
+
+	avc_cache_threshold = new_value;
+
+	ret = count;
+out:
+	free_page((unsigned long)page);
+	return ret;
+}
+
+static ssize_t sel_read_avc_hash_stats(struct file *filp, char __user *buf,
+				       size_t count, loff_t *ppos)
+{
+	char *page;
+	ssize_t length;
+
+	page = (char *)__get_free_page(GFP_KERNEL);
+	if (!page)
+		return -ENOMEM;
+
+	length = avc_get_hash_stats(page);
+	if (length >= 0)
+		length = simple_read_from_buffer(buf, count, ppos, page, length);
+	free_page((unsigned long)page);
+
+	return length;
+}
+
+static const struct file_operations sel_avc_cache_threshold_ops = {
+	.read		= sel_read_avc_cache_threshold,
+	.write		= sel_write_avc_cache_threshold,
+	.llseek		= generic_file_llseek,
+};
+
+static const struct file_operations sel_avc_hash_stats_ops = {
+	.read		= sel_read_avc_hash_stats,
+	.llseek		= generic_file_llseek,
+};
+
+#ifdef CONFIG_SECURITY_SELINUX_AVC_STATS
+static struct avc_cache_stats *sel_avc_get_stat_idx(loff_t *idx)
+{
+	int cpu;
+
+	for (cpu = *idx; cpu < nr_cpu_ids; ++cpu) {
+		if (!cpu_possible(cpu))
+			continue;
+		*idx = cpu + 1;
+		return &per_cpu(avc_cache_stats, cpu);
+	}
+	return NULL;
+}
+
+static void *sel_avc_stats_seq_start(struct seq_file *seq, loff_t *pos)
+{
+	loff_t n = *pos - 1;
+
+	if (*pos == 0)
+		return SEQ_START_TOKEN;
+
+	return sel_avc_get_stat_idx(&n);
+}
+
+static void *sel_avc_stats_seq_next(struct seq_file *seq, void *v, loff_t *pos)
+{
+	return sel_avc_get_stat_idx(pos);
+}
+
+static int sel_avc_stats_seq_show(struct seq_file *seq, void *v)
+{
+	struct avc_cache_stats *st = v;
+
+	if (v == SEQ_START_TOKEN)
+		seq_printf(seq, "lookups hits misses allocations reclaims "
+			   "frees\n");
+	else {
+		unsigned int lookups = st->lookups;
+		unsigned int misses = st->misses;
+		unsigned int hits = lookups - misses;
+		seq_printf(seq, "%u %u %u %u %u %u\n", lookups,
+			   hits, misses, st->allocations,
+			   st->reclaims, st->frees);
+	}
+	return 0;
+}
+
+static void sel_avc_stats_seq_stop(struct seq_file *seq, void *v)
+{ }
+
+static const struct seq_operations sel_avc_cache_stats_seq_ops = {
+	.start		= sel_avc_stats_seq_start,
+	.next		= sel_avc_stats_seq_next,
+	.show		= sel_avc_stats_seq_show,
+	.stop		= sel_avc_stats_seq_stop,
+};
+
+static int sel_open_avc_cache_stats(struct inode *inode, struct file *file)
+{
+	return seq_open(file, &sel_avc_cache_stats_seq_ops);
+}
+
+static const struct file_operations sel_avc_cache_stats_ops = {
+	.open		= sel_open_avc_cache_stats,
+	.read		= seq_read,
+	.llseek		= seq_lseek,
+	.release	= seq_release,
+};
+#endif
+
+static int sel_make_avc_files(struct dentry *dir)
+{
+	int i;
+	static struct tree_descr files[] = {
+		{ "cache_threshold",
+		  &sel_avc_cache_threshold_ops, S_IRUGO|S_IWUSR },
+		{ "hash_stats", &sel_avc_hash_stats_ops, S_IRUGO },
+#ifdef CONFIG_SECURITY_SELINUX_AVC_STATS
+		{ "cache_stats", &sel_avc_cache_stats_ops, S_IRUGO },
+#endif
+	};
+
+	for (i = 0; i < ARRAY_SIZE(files); i++) {
+		struct inode *inode;
+		struct dentry *dentry;
+
+		dentry = d_alloc_name(dir, files[i].name);
+		if (!dentry)
+			return -ENOMEM;
+
+		inode = sel_make_inode(dir->d_sb, S_IFREG|files[i].mode);
+		if (!inode)
+			return -ENOMEM;
+
+		inode->i_fop = files[i].ops;
+		inode->i_ino = ++sel_last_ino;
+		d_add(dentry, inode);
+	}
+
+	return 0;
+}
+
+static ssize_t sel_read_initcon(struct file *file, char __user *buf,
+				size_t count, loff_t *ppos)
+{
+	char *con;
+	u32 sid, len;
+	ssize_t ret;
+
+	sid = file_inode(file)->i_ino&SEL_INO_MASK;
+	ret = security_sid_to_context(sid, &con, &len);
+	if (ret)
+		return ret;
+
+	ret = simple_read_from_buffer(buf, count, ppos, con, len);
+	kfree(con);
+	return ret;
+}
+
+static const struct file_operations sel_initcon_ops = {
+	.read		= sel_read_initcon,
+	.llseek		= generic_file_llseek,
+};
+
+static int sel_make_initcon_files(struct dentry *dir)
+{
+	int i;
+
+	for (i = 1; i <= SECINITSID_NUM; i++) {
+		struct inode *inode;
+		struct dentry *dentry;
+		dentry = d_alloc_name(dir, security_get_initial_sid_context(i));
+		if (!dentry)
+			return -ENOMEM;
+
+		inode = sel_make_inode(dir->d_sb, S_IFREG|S_IRUGO);
+		if (!inode)
+			return -ENOMEM;
+
+		inode->i_fop = &sel_initcon_ops;
+		inode->i_ino = i|SEL_INITCON_INO_OFFSET;
+		d_add(dentry, inode);
+	}
+
+	return 0;
+}
+
+static inline unsigned long sel_class_to_ino(u16 class)
+{
+	return (class * (SEL_VEC_MAX + 1)) | SEL_CLASS_INO_OFFSET;
+}
+
+static inline u16 sel_ino_to_class(unsigned long ino)
+{
+	return (ino & SEL_INO_MASK) / (SEL_VEC_MAX + 1);
+}
+
+static inline unsigned long sel_perm_to_ino(u16 class, u32 perm)
+{
+	return (class * (SEL_VEC_MAX + 1) + perm) | SEL_CLASS_INO_OFFSET;
+}
+
+static inline u32 sel_ino_to_perm(unsigned long ino)
+{
+	return (ino & SEL_INO_MASK) % (SEL_VEC_MAX + 1);
+}
+
+static ssize_t sel_read_class(struct file *file, char __user *buf,
+				size_t count, loff_t *ppos)
+{
+	unsigned long ino = file_inode(file)->i_ino;
+	char res[TMPBUFLEN];
+	ssize_t len = snprintf(res, sizeof(res), "%d", sel_ino_to_class(ino));
+	return simple_read_from_buffer(buf, count, ppos, res, len);
+}
+
+static const struct file_operations sel_class_ops = {
+	.read		= sel_read_class,
+	.llseek		= generic_file_llseek,
+};
+
+static ssize_t sel_read_perm(struct file *file, char __user *buf,
+				size_t count, loff_t *ppos)
+{
+	unsigned long ino = file_inode(file)->i_ino;
+	char res[TMPBUFLEN];
+	ssize_t len = snprintf(res, sizeof(res), "%d", sel_ino_to_perm(ino));
+	return simple_read_from_buffer(buf, count, ppos, res, len);
+}
+
+static const struct file_operations sel_perm_ops = {
+	.read		= sel_read_perm,
+	.llseek		= generic_file_llseek,
+};
+
+static ssize_t sel_read_policycap(struct file *file, char __user *buf,
+				  size_t count, loff_t *ppos)
+{
+	int value;
+	char tmpbuf[TMPBUFLEN];
+	ssize_t length;
+	unsigned long i_ino = file_inode(file)->i_ino;
+
+	value = security_policycap_supported(i_ino & SEL_INO_MASK);
+	length = scnprintf(tmpbuf, TMPBUFLEN, "%d", value);
+
+	return simple_read_from_buffer(buf, count, ppos, tmpbuf, length);
+}
+
+static const struct file_operations sel_policycap_ops = {
+	.read		= sel_read_policycap,
+	.llseek		= generic_file_llseek,
+};
+
+static int sel_make_perm_files(char *objclass, int classvalue,
+				struct dentry *dir)
+{
+	int i, rc, nperms;
+	char **perms;
+
+	rc = security_get_permissions(objclass, &perms, &nperms);
+	if (rc)
+		return rc;
+
+	for (i = 0; i < nperms; i++) {
+		struct inode *inode;
+		struct dentry *dentry;
+
+		rc = -ENOMEM;
+		dentry = d_alloc_name(dir, perms[i]);
+		if (!dentry)
+			goto out;
+
+		rc = -ENOMEM;
+		inode = sel_make_inode(dir->d_sb, S_IFREG|S_IRUGO);
+		if (!inode)
+			goto out;
+
+		inode->i_fop = &sel_perm_ops;
+		/* i+1 since perm values are 1-indexed */
+		inode->i_ino = sel_perm_to_ino(classvalue, i + 1);
+		d_add(dentry, inode);
+	}
+	rc = 0;
+out:
+	for (i = 0; i < nperms; i++)
+		kfree(perms[i]);
+	kfree(perms);
+	return rc;
+}
+
+static int sel_make_class_dir_entries(char *classname, int index,
+					struct dentry *dir)
+{
+	struct dentry *dentry = NULL;
+	struct inode *inode = NULL;
+	int rc;
+
+	dentry = d_alloc_name(dir, "index");
+	if (!dentry)
+		return -ENOMEM;
+
+	inode = sel_make_inode(dir->d_sb, S_IFREG|S_IRUGO);
+	if (!inode)
+		return -ENOMEM;
+
+	inode->i_fop = &sel_class_ops;
+	inode->i_ino = sel_class_to_ino(index);
+	d_add(dentry, inode);
+
+	dentry = sel_make_dir(dir, "perms", &last_class_ino);
+	if (IS_ERR(dentry))
+		return PTR_ERR(dentry);
+
+	rc = sel_make_perm_files(classname, index, dentry);
+
+	return rc;
+}
+
+static int sel_make_classes(void)
+{
+	int rc, nclasses, i;
+	char **classes;
+
+	/* delete any existing entries */
+	sel_remove_entries(class_dir);
+
+	rc = security_get_classes(&classes, &nclasses);
+	if (rc)
+		return rc;
+
+	/* +2 since classes are 1-indexed */
+	last_class_ino = sel_class_to_ino(nclasses + 2);
+
+	for (i = 0; i < nclasses; i++) {
+		struct dentry *class_name_dir;
+
+		class_name_dir = sel_make_dir(class_dir, classes[i],
+				&last_class_ino);
+		if (IS_ERR(class_name_dir)) {
+			rc = PTR_ERR(class_name_dir);
+			goto out;
+		}
+
+		/* i+1 since class values are 1-indexed */
+		rc = sel_make_class_dir_entries(classes[i], i + 1,
+				class_name_dir);
+		if (rc)
+			goto out;
+	}
+	rc = 0;
+out:
+	for (i = 0; i < nclasses; i++)
+		kfree(classes[i]);
+	kfree(classes);
+	return rc;
+}
+
+static int sel_make_policycap(void)
+{
+	unsigned int iter;
+	struct dentry *dentry = NULL;
+	struct inode *inode = NULL;
+
+	sel_remove_entries(policycap_dir);
+
+	for (iter = 0; iter <= POLICYDB_CAPABILITY_MAX; iter++) {
+		if (iter < ARRAY_SIZE(policycap_names))
+			dentry = d_alloc_name(policycap_dir,
+					      policycap_names[iter]);
+		else
+			dentry = d_alloc_name(policycap_dir, "unknown");
+
+		if (dentry == NULL)
+			return -ENOMEM;
+
+		inode = sel_make_inode(policycap_dir->d_sb, S_IFREG | S_IRUGO);
+		if (inode == NULL)
+			return -ENOMEM;
+
+		inode->i_fop = &sel_policycap_ops;
+		inode->i_ino = iter | SEL_POLICYCAP_INO_OFFSET;
+		d_add(dentry, inode);
+	}
+
+	return 0;
+}
+
+static struct dentry *sel_make_dir(struct dentry *dir, const char *name,
+			unsigned long *ino)
+{
+	struct dentry *dentry = d_alloc_name(dir, name);
+	struct inode *inode;
+
+	if (!dentry)
+		return ERR_PTR(-ENOMEM);
+
+	inode = sel_make_inode(dir->d_sb, S_IFDIR | S_IRUGO | S_IXUGO);
+	if (!inode) {
+		dput(dentry);
+		return ERR_PTR(-ENOMEM);
+	}
+
+	inode->i_op = &simple_dir_inode_operations;
+	inode->i_fop = &simple_dir_operations;
+	inode->i_ino = ++(*ino);
+	/* directory inodes start off with i_nlink == 2 (for "." entry) */
+	inc_nlink(inode);
+	d_add(dentry, inode);
+	/* bump link count on parent directory, too */
+	inc_nlink(d_inode(dir));
+
+	return dentry;
+}
+
+static int sel_fill_super(struct super_block *sb, void *data, int silent)
+{
+	int ret;
+	struct dentry *dentry;
+	struct inode *inode;
+	struct inode_security_struct *isec;
+
+	static struct tree_descr selinux_files[] = {
+		[SEL_LOAD] = {"load", &sel_load_ops, S_IRUSR|S_IWUSR},
+		[SEL_ENFORCE] = {"enforce", &sel_enforce_ops, S_IRUGO|S_IWUSR},
+		[SEL_CONTEXT] = {"context", &transaction_ops, S_IRUGO|S_IWUGO},
+		[SEL_ACCESS] = {"access", &transaction_ops, S_IRUGO|S_IWUGO},
+		[SEL_CREATE] = {"create", &transaction_ops, S_IRUGO|S_IWUGO},
+		[SEL_RELABEL] = {"relabel", &transaction_ops, S_IRUGO|S_IWUGO},
+		[SEL_USER] = {"user", &transaction_ops, S_IRUGO|S_IWUGO},
+		[SEL_POLICYVERS] = {"policyvers", &sel_policyvers_ops, S_IRUGO},
+		[SEL_COMMIT_BOOLS] = {"commit_pending_bools", &sel_commit_bools_ops, S_IWUSR},
+		[SEL_MLS] = {"mls", &sel_mls_ops, S_IRUGO},
+		[SEL_DISABLE] = {"disable", &sel_disable_ops, S_IWUSR},
+		[SEL_MEMBER] = {"member", &transaction_ops, S_IRUGO|S_IWUGO},
+		[SEL_CHECKREQPROT] = {"checkreqprot", &sel_checkreqprot_ops, S_IRUGO|S_IWUSR},
+		[SEL_REJECT_UNKNOWN] = {"reject_unknown", &sel_handle_unknown_ops, S_IRUGO},
+		[SEL_DENY_UNKNOWN] = {"deny_unknown", &sel_handle_unknown_ops, S_IRUGO},
+		[SEL_STATUS] = {"status", &sel_handle_status_ops, S_IRUGO},
+		[SEL_POLICY] = {"policy", &sel_policy_ops, S_IRUGO},
+		/* last one */ {""}
+	};
+	ret = simple_fill_super(sb, SELINUX_MAGIC, selinux_files);
+	if (ret)
+		goto err;
+
+	bool_dir = sel_make_dir(sb->s_root, BOOL_DIR_NAME, &sel_last_ino);
+	if (IS_ERR(bool_dir)) {
+		ret = PTR_ERR(bool_dir);
+		bool_dir = NULL;
+		goto err;
+	}
+
+	ret = -ENOMEM;
+	dentry = d_alloc_name(sb->s_root, NULL_FILE_NAME);
+	if (!dentry)
+		goto err;
+
+	ret = -ENOMEM;
+	inode = sel_make_inode(sb, S_IFCHR | S_IRUGO | S_IWUGO);
+	if (!inode)
+		goto err;
+
+	inode->i_ino = ++sel_last_ino;
+	isec = (struct inode_security_struct *)inode->i_security;
+	isec->sid = SECINITSID_DEVNULL;
+	isec->sclass = SECCLASS_CHR_FILE;
+	isec->initialized = 1;
+
+	init_special_inode(inode, S_IFCHR | S_IRUGO | S_IWUGO, MKDEV(MEM_MAJOR, 3));
+	d_add(dentry, inode);
+	selinux_null.dentry = dentry;
+
+	dentry = sel_make_dir(sb->s_root, "avc", &sel_last_ino);
+	if (IS_ERR(dentry)) {
+		ret = PTR_ERR(dentry);
+		goto err;
+	}
+
+	ret = sel_make_avc_files(dentry);
+	if (ret)
+		goto err;
+
+	dentry = sel_make_dir(sb->s_root, "initial_contexts", &sel_last_ino);
+	if (IS_ERR(dentry)) {
+		ret = PTR_ERR(dentry);
+		goto err;
+	}
+
+	ret = sel_make_initcon_files(dentry);
+	if (ret)
+		goto err;
+
+	class_dir = sel_make_dir(sb->s_root, "class", &sel_last_ino);
+	if (IS_ERR(class_dir)) {
+		ret = PTR_ERR(class_dir);
+		class_dir = NULL;
+		goto err;
+	}
+
+	policycap_dir = sel_make_dir(sb->s_root, "policy_capabilities", &sel_last_ino);
+	if (IS_ERR(policycap_dir)) {
+		ret = PTR_ERR(policycap_dir);
+		policycap_dir = NULL;
+		goto err;
+	}
+	return 0;
+err:
+	printk(KERN_ERR "SELinux: %s:  failed while creating inodes\n",
+		__func__);
+	return ret;
+}
+
+static struct dentry *sel_mount(struct file_system_type *fs_type,
+		      int flags, const char *dev_name, void *data)
+{
+	return mount_single(fs_type, flags, data, sel_fill_super);
+}
+
+static struct file_system_type sel_fs_type = {
+	.name		= "selinuxfs",
+	.mount		= sel_mount,
+	.kill_sb	= kill_litter_super,
+};
+
+struct vfsmount *selinuxfs_mount;
+
+static int __init init_sel_fs(void)
+{
+	int err;
+
+	if (!selinux_enabled)
+		return 0;
+
+	err = sysfs_create_mount_point(fs_kobj, "selinux");
+	if (err)
+		return err;
+
+	err = register_filesystem(&sel_fs_type);
+	if (err) {
+		sysfs_remove_mount_point(fs_kobj, "selinux");
+		return err;
+	}
+
+	selinux_null.mnt = selinuxfs_mount = kern_mount(&sel_fs_type);
+	if (IS_ERR(selinuxfs_mount)) {
+		printk(KERN_ERR "selinuxfs:  could not mount!\n");
+		err = PTR_ERR(selinuxfs_mount);
+		selinuxfs_mount = NULL;
+	}
+
+	return err;
+}
+
+__initcall(init_sel_fs);
+
+#ifdef CONFIG_SECURITY_SELINUX_DISABLE
+void exit_sel_fs(void)
+{
+	sysfs_remove_mount_point(fs_kobj, "selinux");
+	kern_unmount(selinuxfs_mount);
+	unregister_filesystem(&sel_fs_type);
+}
+#endif