Linux-2.6.12-rc2v2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!

1 files changed, 1340 insertions, 0 deletions

diff --git a/security/selinux/selinuxfs.c b/security/selinux/selinuxfs.c
new file mode 100644
index 000000000000..07221568b505
--- /dev/null
+++ b/security/selinux/selinuxfs.c
@@ -0,0 +1,1340 @@
+/* Updated: Karl MacMillan <kmacmillan@tresys.com>
+ *
+ *      Added conditional policy language extensions
+ *
+ * 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/config.h>
+#include <linux/kernel.h>
+#include <linux/pagemap.h>
+#include <linux/slab.h>
+#include <linux/vmalloc.h>
+#include <linux/fs.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 <asm/uaccess.h>
+#include <asm/semaphore.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"
+
+unsigned int selinux_checkreqprot = CONFIG_SECURITY_SELINUX_CHECKREQPROT_VALUE;
+
+static int __init checkreqprot_setup(char *str)
+{
+        selinux_checkreqprot = simple_strtoul(str,NULL,0) ? 1 : 0;
+        return 1;
+}
+__setup("checkreqprot=", checkreqprot_setup);
+
+
+static DECLARE_MUTEX(sel_sem);
+
+/* global data for booleans */
+static struct dentry *bool_dir = NULL;
+static int bool_num = 0;
+static int *bool_pending_values = NULL;
+
+extern void selnl_notify_setenforce(int val);
+
+/* Check whether a task is allowed to use a security operation. */
+static int task_has_security(struct task_struct *tsk,
+                             u32 perms)
+{
+        struct task_security_struct *tsec;
+
+        tsec = tsk->security;
+        if (!tsec)
+                return -EACCES;
+
+        return avc_has_perm(tsec->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_AVC,        /* AVC management directory */
+        SEL_MEMBER,     /* compute polyinstantiation membership decision */
+        SEL_CHECKREQPROT, /* check requested protection, not kernel-applied one */
+};
+
+#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;
+        ssize_t length;
+        int new_value;
+
+        if (count < 0 || count >= PAGE_SIZE)
+                return -ENOMEM;
+        if (*ppos != 0) {
+                /* No partial writes. */
+                return -EINVAL;
+        }
+        page = (char*)get_zeroed_page(GFP_KERNEL);
+        if (!page)
+                return -ENOMEM;
+        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;
+                selinux_enforcing = new_value;
+                if (selinux_enforcing)
+                        avc_ss_reset(0);
+                selnl_notify_setenforce(selinux_enforcing);
+        }
+        length = count;
+out:
+        free_page((unsigned long) page);
+        return length;
+}
+#else
+#define sel_write_enforce NULL
+#endif
+
+static struct file_operations sel_enforce_ops = {
+        .read           = sel_read_enforce,
+        .write          = sel_write_enforce,
+};
+
+#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;
+        ssize_t length;
+        int new_value;
+        extern int selinux_disable(void);
+
+        if (count < 0 || count >= PAGE_SIZE)
+                return -ENOMEM;
+        if (*ppos != 0) {
+                /* No partial writes. */
+                return -EINVAL;
+        }
+        page = (char*)get_zeroed_page(GFP_KERNEL);
+        if (!page)
+                return -ENOMEM;
+        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 < 0)
+                        goto out;
+        }
+
+        length = count;
+out:
+        free_page((unsigned long) page);
+        return length;
+}
+#else
+#define sel_write_disable NULL
+#endif
+
+static struct file_operations sel_disable_ops = {
+        .write          = sel_write_disable,
+};
+
+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 struct file_operations sel_policyvers_ops = {
+        .read           = sel_read_policyvers,
+};
+
+/* declaration for sel_write_load */
+static int sel_make_bools(void);
+
+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", selinux_mls_enabled);
+        return simple_read_from_buffer(buf, count, ppos, tmpbuf, length);
+}
+
+static struct file_operations sel_mls_ops = {
+        .read           = sel_read_mls,
+};
+
+static ssize_t sel_write_load(struct file * file, const char __user * buf,
+                              size_t count, loff_t *ppos)
+
+{
+        int ret;
+        ssize_t length;
+        void *data = NULL;
+
+        down(&sel_sem);
+
+        length = task_has_security(current, SECURITY__LOAD_POLICY);
+        if (length)
+                goto out;
+
+        if (*ppos != 0) {
+                /* No partial writes. */
+                length = -EINVAL;
+                goto out;
+        }
+
+        if ((count < 0) || (count > 64 * 1024 * 1024)
+            || (data = vmalloc(count)) == NULL) {
+                length = -ENOMEM;
+                goto out;
+        }
+
+        length = -EFAULT;
+        if (copy_from_user(data, buf, count) != 0)
+                goto out;
+
+        length = security_load_policy(data, count);
+        if (length)
+                goto out;
+
+        ret = sel_make_bools();
+        if (ret)
+                length = ret;
+        else
+                length = count;
+out:
+        up(&sel_sem);
+        vfree(data);
+        return length;
+}
+
+static struct file_operations sel_load_ops = {
+        .write          = sel_write_load,
+};
+
+
+static ssize_t sel_write_context(struct file * file, const char __user * buf,
+                                 size_t count, loff_t *ppos)
+
+{
+        char *page;
+        u32 sid;
+        ssize_t length;
+
+        length = task_has_security(current, SECURITY__CHECK_CONTEXT);
+        if (length)
+                return length;
+
+        if (count < 0 || count >= PAGE_SIZE)
+                return -ENOMEM;
+        if (*ppos != 0) {
+                /* No partial writes. */
+                return -EINVAL;
+        }
+        page = (char*)get_zeroed_page(GFP_KERNEL);
+        if (!page)
+                return -ENOMEM;
+        length = -EFAULT;
+        if (copy_from_user(page, buf, count))
+                goto out;
+
+        length = security_context_to_sid(page, count, &sid);
+        if (length < 0)
+                goto out;
+
+        length = count;
+out:
+        free_page((unsigned long) page);
+        return length;
+}
+
+static struct file_operations sel_context_ops = {
+        .write          = sel_write_context,
+};
+
+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;
+        ssize_t length;
+        unsigned int new_value;
+
+        length = task_has_security(current, SECURITY__SETCHECKREQPROT);
+        if (length)
+                return length;
+
+        if (count < 0 || count >= PAGE_SIZE)
+                return -ENOMEM;
+        if (*ppos != 0) {
+                /* No partial writes. */
+                return -EINVAL;
+        }
+        page = (char*)get_zeroed_page(GFP_KERNEL);
+        if (!page)
+                return -ENOMEM;
+        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 struct file_operations sel_checkreqprot_ops = {
+        .read           = sel_read_checkreqprot,
+        .write          = sel_write_checkreqprot,
+};
+
+/*
+ * 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,
+};
+
+static ssize_t selinux_transaction_write(struct file *file, const char __user *buf, size_t size, loff_t *pos)
+{
+        ino_t ino =  file->f_dentry->d_inode->i_ino;
+        char *data;
+        ssize_t rv;
+
+        if (ino >= sizeof(write_op)/sizeof(write_op[0]) || !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 struct file_operations transaction_ops = {
+        .write          = selinux_transaction_write,
+        .read           = simple_transaction_read,
+        .release        = simple_transaction_release,
+};
+
+/*
+ * 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, *tcon;
+        u32 ssid, tsid;
+        u16 tclass;
+        u32 req;
+        struct av_decision avd;
+        ssize_t length;
+
+        length = task_has_security(current, SECURITY__COMPUTE_AV);
+        if (length)
+                return length;
+
+        length = -ENOMEM;
+        scon = kmalloc(size+1, GFP_KERNEL);
+        if (!scon)
+                return length;
+        memset(scon, 0, size+1);
+
+        tcon = kmalloc(size+1, GFP_KERNEL);
+        if (!tcon)
+                goto out;
+        memset(tcon, 0, size+1);
+
+        length = -EINVAL;
+        if (sscanf(buf, "%s %s %hu %x", scon, tcon, &tclass, &req) != 4)
+                goto out2;
+
+        length = security_context_to_sid(scon, strlen(scon)+1, &ssid);
+        if (length < 0)
+                goto out2;
+        length = security_context_to_sid(tcon, strlen(tcon)+1, &tsid);
+        if (length < 0)
+                goto out2;
+
+        length = security_compute_av(ssid, tsid, tclass, req, &avd);
+        if (length < 0)
+                goto out2;
+
+        length = scnprintf(buf, SIMPLE_TRANSACTION_LIMIT,
+                          "%x %x %x %x %u",
+                          avd.allowed, avd.decided,
+                          avd.auditallow, avd.auditdeny,
+                          avd.seqno);
+out2:
+        kfree(tcon);
+out:
+        kfree(scon);
+        return length;
+}
+
+static ssize_t sel_write_create(struct file * file, char *buf, size_t size)
+{
+        char *scon, *tcon;
+        u32 ssid, tsid, newsid;
+        u16 tclass;
+        ssize_t length;
+        char *newcon;
+        u32 len;
+
+        length = task_has_security(current, SECURITY__COMPUTE_CREATE);
+        if (length)
+                return length;
+
+        length = -ENOMEM;
+        scon = kmalloc(size+1, GFP_KERNEL);
+        if (!scon)
+                return length;
+        memset(scon, 0, size+1);
+
+        tcon = kmalloc(size+1, GFP_KERNEL);
+        if (!tcon)
+                goto out;
+        memset(tcon, 0, size+1);
+
+        length = -EINVAL;
+        if (sscanf(buf, "%s %s %hu", scon, tcon, &tclass) != 3)
+                goto out2;
+
+        length = security_context_to_sid(scon, strlen(scon)+1, &ssid);
+        if (length < 0)
+                goto out2;
+        length = security_context_to_sid(tcon, strlen(tcon)+1, &tsid);
+        if (length < 0)
+                goto out2;
+
+        length = security_transition_sid(ssid, tsid, tclass, &newsid);
+        if (length < 0)
+                goto out2;
+
+        length = security_sid_to_context(newsid, &newcon, &len);
+        if (length < 0)
+                goto out2;
+
+        if (len > SIMPLE_TRANSACTION_LIMIT) {
+                printk(KERN_ERR "%s:  context size (%u) exceeds payload "
+                       "max\n", __FUNCTION__, len);
+                length = -ERANGE;
+                goto out3;
+        }
+
+        memcpy(buf, newcon, len);
+        length = len;
+out3:
+        kfree(newcon);
+out2:
+        kfree(tcon);
+out:
+        kfree(scon);
+        return length;
+}
+
+static ssize_t sel_write_relabel(struct file * file, char *buf, size_t size)
+{
+        char *scon, *tcon;
+        u32 ssid, tsid, newsid;
+        u16 tclass;
+        ssize_t length;
+        char *newcon;
+        u32 len;
+
+        length = task_has_security(current, SECURITY__COMPUTE_RELABEL);
+        if (length)
+                return length;
+
+        length = -ENOMEM;
+        scon = kmalloc(size+1, GFP_KERNEL);
+        if (!scon)
+                return length;
+        memset(scon, 0, size+1);
+
+        tcon = kmalloc(size+1, GFP_KERNEL);
+        if (!tcon)
+                goto out;
+        memset(tcon, 0, size+1);
+
+        length = -EINVAL;
+        if (sscanf(buf, "%s %s %hu", scon, tcon, &tclass) != 3)
+                goto out2;
+
+        length = security_context_to_sid(scon, strlen(scon)+1, &ssid);
+        if (length < 0)
+                goto out2;
+        length = security_context_to_sid(tcon, strlen(tcon)+1, &tsid);
+        if (length < 0)
+                goto out2;
+
+        length = security_change_sid(ssid, tsid, tclass, &newsid);
+        if (length < 0)
+                goto out2;
+
+        length = security_sid_to_context(newsid, &newcon, &len);
+        if (length < 0)
+                goto out2;
+
+        if (len > SIMPLE_TRANSACTION_LIMIT) {
+                length = -ERANGE;
+                goto out3;
+        }
+
+        memcpy(buf, newcon, len);
+        length = len;
+out3:
+        kfree(newcon);
+out2:
+        kfree(tcon);
+out:
+        kfree(scon);
+        return length;
+}
+
+static ssize_t sel_write_user(struct file * file, char *buf, size_t size)
+{
+        char *con, *user, *ptr;
+        u32 sid, *sids;
+        ssize_t length;
+        char *newcon;
+        int i, rc;
+        u32 len, nsids;
+
+        length = task_has_security(current, SECURITY__COMPUTE_USER);
+        if (length)
+                return length;
+
+        length = -ENOMEM;
+        con = kmalloc(size+1, GFP_KERNEL);
+        if (!con)
+                return length;
+        memset(con, 0, size+1);
+
+        user = kmalloc(size+1, GFP_KERNEL);
+        if (!user)
+                goto out;
+        memset(user, 0, size+1);
+
+        length = -EINVAL;
+        if (sscanf(buf, "%s %s", con, user) != 2)
+                goto out2;
+
+        length = security_context_to_sid(con, strlen(con)+1, &sid);
+        if (length < 0)
+                goto out2;
+
+        length = security_get_user_sids(sid, user, &sids, &nsids);
+        if (length < 0)
+                goto out2;
+
+        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 out3;
+                }
+                if ((length + len) >= SIMPLE_TRANSACTION_LIMIT) {
+                        kfree(newcon);
+                        length = -ERANGE;
+                        goto out3;
+                }
+                memcpy(ptr, newcon, len);
+                kfree(newcon);
+                ptr += len;
+                length += len;
+        }
+out3:
+        kfree(sids);
+out2:
+        kfree(user);
+out:
+        kfree(con);
+        return length;
+}
+
+static ssize_t sel_write_member(struct file * file, char *buf, size_t size)
+{
+        char *scon, *tcon;
+        u32 ssid, tsid, newsid;
+        u16 tclass;
+        ssize_t length;
+        char *newcon;
+        u32 len;
+
+        length = task_has_security(current, SECURITY__COMPUTE_MEMBER);
+        if (length)
+                return length;
+
+        length = -ENOMEM;
+        scon = kmalloc(size+1, GFP_KERNEL);
+        if (!scon)
+                return length;
+        memset(scon, 0, size+1);
+
+        tcon = kmalloc(size+1, GFP_KERNEL);
+        if (!tcon)
+                goto out;
+        memset(tcon, 0, size+1);
+
+        length = -EINVAL;
+        if (sscanf(buf, "%s %s %hu", scon, tcon, &tclass) != 3)
+                goto out2;
+
+        length = security_context_to_sid(scon, strlen(scon)+1, &ssid);
+        if (length < 0)
+                goto out2;
+        length = security_context_to_sid(tcon, strlen(tcon)+1, &tsid);
+        if (length < 0)
+                goto out2;
+
+        length = security_member_sid(ssid, tsid, tclass, &newsid);
+        if (length < 0)
+                goto out2;
+
+        length = security_sid_to_context(newsid, &newcon, &len);
+        if (length < 0)
+                goto out2;
+
+        if (len > SIMPLE_TRANSACTION_LIMIT) {
+                printk(KERN_ERR "%s:  context size (%u) exceeds payload "
+                       "max\n", __FUNCTION__, len);
+                length = -ERANGE;
+                goto out3;
+        }
+
+        memcpy(buf, newcon, len);
+        length = len;
+out3:
+        kfree(newcon);
+out2:
+        kfree(tcon);
+out:
+        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_uid = ret->i_gid = 0;
+                ret->i_blksize = PAGE_CACHE_SIZE;
+                ret->i_blocks = 0;
+                ret->i_atime = ret->i_mtime = ret->i_ctime = CURRENT_TIME;
+        }
+        return ret;
+}
+
+#define BOOL_INO_OFFSET 30
+
+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 end;
+        ssize_t ret;
+        int cur_enforcing;
+        struct inode *inode;
+
+        down(&sel_sem);
+
+        ret = -EFAULT;
+
+        /* check to see if this file has been deleted */
+        if (!filep->f_op)
+                goto out;
+
+        if (count < 0 || count > PAGE_SIZE) {
+                ret = -EINVAL;
+                goto out;
+        }
+        if (!(page = (char*)get_zeroed_page(GFP_KERNEL))) {
+                ret = -ENOMEM;
+                goto out;
+        }
+
+        inode = filep->f_dentry->d_inode;
+        cur_enforcing = security_get_bool_value(inode->i_ino - BOOL_INO_OFFSET);
+        if (cur_enforcing < 0) {
+                ret = cur_enforcing;
+                goto out;
+        }
+
+        length = scnprintf(page, PAGE_SIZE, "%d %d", cur_enforcing,
+                          bool_pending_values[inode->i_ino - BOOL_INO_OFFSET]);
+        if (length < 0) {
+                ret = length;
+                goto out;
+        }
+
+        if (*ppos >= length) {
+                ret = 0;
+                goto out;
+        }
+        if (count + *ppos > length)
+                count = length - *ppos;
+        end = count + *ppos;
+        if (copy_to_user(buf, (char *) page + *ppos, count)) {
+                ret = -EFAULT;
+                goto out;
+        }
+        *ppos = end;
+        ret = count;
+out:
+        up(&sel_sem);
+        if (page)
+                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 = -EFAULT;
+        int new_value;
+        struct inode *inode;
+
+        down(&sel_sem);
+
+        length = task_has_security(current, SECURITY__SETBOOL);
+        if (length)
+                goto out;
+
+        /* check to see if this file has been deleted */
+        if (!filep->f_op)
+                goto out;
+
+        if (count < 0 || count >= PAGE_SIZE) {
+                length = -ENOMEM;
+                goto out;
+        }
+        if (*ppos != 0) {
+                /* No partial writes. */
+                goto out;
+        }
+        page = (char*)get_zeroed_page(GFP_KERNEL);
+        if (!page) {
+                length = -ENOMEM;
+                goto out;
+        }
+
+        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;
+
+        inode = filep->f_dentry->d_inode;
+        bool_pending_values[inode->i_ino - BOOL_INO_OFFSET] = new_value;
+        length = count;
+
+out:
+        up(&sel_sem);
+        if (page)
+                free_page((unsigned long) page);
+        return length;
+}
+
+static struct file_operations sel_bool_ops = {
+        .read           = sel_read_bool,
+        .write          = sel_write_bool,
+};
+
+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 = -EFAULT;
+        int new_value;
+
+        down(&sel_sem);
+
+        length = task_has_security(current, SECURITY__SETBOOL);
+        if (length)
+                goto out;
+
+        /* check to see if this file has been deleted */
+        if (!filep->f_op)
+                goto out;
+
+        if (count < 0 || count >= PAGE_SIZE) {
+                length = -ENOMEM;
+                goto out;
+        }
+        if (*ppos != 0) {
+                /* No partial writes. */
+                goto out;
+        }
+        page = (char*)get_zeroed_page(GFP_KERNEL);
+        if (!page) {
+                length = -ENOMEM;
+                goto out;
+        }
+
+        if (copy_from_user(page, buf, count))
+                goto out;
+
+        length = -EINVAL;
+        if (sscanf(page, "%d", &new_value) != 1)
+                goto out;
+
+        if (new_value) {
+                security_set_bools(bool_num, bool_pending_values);
+        }
+
+        length = count;
+
+out:
+        up(&sel_sem);
+        if (page)
+                free_page((unsigned long) page);
+        return length;
+}
+
+static struct file_operations sel_commit_bools_ops = {
+        .write          = sel_commit_bools_write,
+};
+
+/* delete booleans - partial revoke() from
+ * fs/proc/generic.c proc_kill_inodes */
+static void sel_remove_bools(struct dentry *de)
+{
+        struct list_head *p, *node;
+        struct super_block *sb = de->d_sb;
+
+        spin_lock(&dcache_lock);
+        node = de->d_subdirs.next;
+        while (node != &de->d_subdirs) {
+                struct dentry *d = list_entry(node, struct dentry, d_child);
+                list_del_init(node);
+
+                if (d->d_inode) {
+                        d = dget_locked(d);
+                        spin_unlock(&dcache_lock);
+                        d_delete(d);
+                        simple_unlink(de->d_inode, d);
+                        dput(d);
+                        spin_lock(&dcache_lock);
+                }
+                node = de->d_subdirs.next;
+        }
+
+        spin_unlock(&dcache_lock);
+
+        file_list_lock();
+        list_for_each(p, &sb->s_files) {
+                struct file * filp = list_entry(p, struct file, f_list);
+                struct dentry * dentry = filp->f_dentry;
+
+                if (dentry->d_parent != de) {
+                        continue;
+                }
+                filp->f_op = NULL;
+        }
+        file_list_unlock();
+}
+
+#define BOOL_DIR_NAME "booleans"
+
+static int sel_make_bools(void)
+{
+        int i, ret = 0;
+        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 */
+        if (bool_pending_values)
+                kfree(bool_pending_values);
+
+        sel_remove_bools(dir);
+
+        if (!(page = (char*)get_zeroed_page(GFP_KERNEL)))
+                return -ENOMEM;
+
+        ret = security_get_bools(&num, &names, &values);
+        if (ret != 0)
+                goto out;
+
+        for (i = 0; i < num; i++) {
+                dentry = d_alloc_name(dir, names[i]);
+                if (!dentry) {
+                        ret = -ENOMEM;
+                        goto err;
+                }
+                inode = sel_make_inode(dir->d_sb, S_IFREG | S_IRUGO | S_IWUSR);
+                if (!inode) {
+                        ret = -ENOMEM;
+                        goto err;
+                }
+
+                len = snprintf(page, PAGE_SIZE, "/%s/%s", BOOL_DIR_NAME, names[i]);
+                if (len < 0) {
+                        ret = -EINVAL;
+                        goto err;
+                } else if (len >= PAGE_SIZE) {
+                        ret = -ENAMETOOLONG;
+                        goto err;
+                }
+                isec = (struct inode_security_struct*)inode->i_security;
+                if ((ret = security_genfs_sid("selinuxfs", page, SECCLASS_FILE, &sid)))
+                        goto err;
+                isec->sid = sid;
+                isec->initialized = 1;
+                inode->i_fop = &sel_bool_ops;
+                inode->i_ino = i + BOOL_INO_OFFSET;
+                d_add(dentry, inode);
+        }
+        bool_num = num;
+        bool_pending_values = values;
+out:
+        free_page((unsigned long)page);
+        if (names) {
+                for (i = 0; i < num; i++) {
+                        if (names[i])
+                                kfree(names[i]);
+                }
+                kfree(names);
+        }
+        return ret;
+err:
+        d_genocide(dir);
+        ret = -ENOMEM;
+        goto out;
+}
+
+#define NULL_FILE_NAME "null"
+
+struct dentry *selinux_null = 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;
+        ssize_t ret;
+        int new_value;
+
+        if (count < 0 || count >= PAGE_SIZE) {
+                ret = -ENOMEM;
+                goto out;
+        }
+
+        if (*ppos != 0) {
+                /* No partial writes. */
+                ret = -EINVAL;
+                goto out;
+        }
+
+        page = (char*)get_zeroed_page(GFP_KERNEL);
+        if (!page) {
+                ret = -ENOMEM;
+                goto out;
+        }
+
+        if (copy_from_user(page, buf, count)) {
+                ret = -EFAULT;
+                goto out_free;
+        }
+
+        if (sscanf(page, "%u", &new_value) != 1) {
+                ret = -EINVAL;
+                goto out;
+        }
+
+        if (new_value != avc_cache_threshold) {
+                ret = task_has_security(current, SECURITY__SETSECPARAM);
+                if (ret)
+                        goto out_free;
+                avc_cache_threshold = new_value;
+        }
+        ret = count;
+out_free:
+        free_page((unsigned long)page);
+out:
+        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 ret = 0;
+
+        page = (char *)__get_free_page(GFP_KERNEL);
+        if (!page) {
+                ret = -ENOMEM;
+                goto out;
+        }
+        ret = avc_get_hash_stats(page);
+        if (ret >= 0)
+                ret = simple_read_from_buffer(buf, count, ppos, page, ret);
+        free_page((unsigned long)page);
+out:
+        return ret;
+}
+
+static struct file_operations sel_avc_cache_threshold_ops = {
+        .read           = sel_read_avc_cache_threshold,
+        .write          = sel_write_avc_cache_threshold,
+};
+
+static struct file_operations sel_avc_hash_stats_ops = {
+        .read           = sel_read_avc_hash_stats,
+};
+
+#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_CPUS; ++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
+                seq_printf(seq, "%u %u %u %u %u %u\n", st->lookups,
+                           st->hits, st->misses, st->allocations,
+                           st->reclaims, st->frees);
+        return 0;
+}
+
+static void sel_avc_stats_seq_stop(struct seq_file *seq, void *v)
+{ }
+
+static 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 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, ret = 0;
+        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 < sizeof (files) / sizeof (files[0]); i++) {
+                struct inode *inode;
+                struct dentry *dentry;
+
+                dentry = d_alloc_name(dir, files[i].name);
+                if (!dentry) {
+                        ret = -ENOMEM;
+                        goto err;
+                }
+
+                inode = sel_make_inode(dir->d_sb, S_IFREG|files[i].mode);
+                if (!inode) {
+                        ret = -ENOMEM;
+                        goto err;
+                }
+                inode->i_fop = files[i].ops;
+                d_add(dentry, inode);
+        }
+out:
+        return ret;
+err:
+        d_genocide(dir);
+        goto out;
+}
+
+static int sel_make_dir(struct super_block *sb, struct dentry *dentry)
+{
+        int ret = 0;
+        struct inode *inode;
+
+        inode = sel_make_inode(sb, S_IFDIR | S_IRUGO | S_IXUGO);
+        if (!inode) {
+                ret = -ENOMEM;
+                goto out;
+        }
+        inode->i_op = &simple_dir_inode_operations;
+        inode->i_fop = &simple_dir_operations;
+        d_add(dentry, inode);
+out:
+        return ret;
+}
+
+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", &sel_context_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},
+                /* last one */ {""}
+        };
+        ret = simple_fill_super(sb, SELINUX_MAGIC, selinux_files);
+        if (ret)
+                return ret;
+
+        dentry = d_alloc_name(sb->s_root, BOOL_DIR_NAME);
+        if (!dentry)
+                return -ENOMEM;
+
+        inode = sel_make_inode(sb, S_IFDIR | S_IRUGO | S_IXUGO);
+        if (!inode)
+                goto out;
+        inode->i_op = &simple_dir_inode_operations;
+        inode->i_fop = &simple_dir_operations;
+        d_add(dentry, inode);
+        bool_dir = dentry;
+        ret = sel_make_bools();
+        if (ret)
+                goto out;
+
+        dentry = d_alloc_name(sb->s_root, NULL_FILE_NAME);
+        if (!dentry)
+                return -ENOMEM;
+
+        inode = sel_make_inode(sb, S_IFCHR | S_IRUGO | S_IWUGO);
+        if (!inode)
+                goto out;
+        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 = d_alloc_name(sb->s_root, "avc");
+        if (!dentry)
+                return -ENOMEM;
+
+        ret = sel_make_dir(sb, dentry);
+        if (ret)
+                goto out;
+
+        ret = sel_make_avc_files(dentry);
+        if (ret)
+                goto out;
+
+        return 0;
+out:
+        dput(dentry);
+        printk(KERN_ERR "%s:  failed while creating inodes\n", __FUNCTION__);
+        return -ENOMEM;
+}
+
+static struct super_block *sel_get_sb(struct file_system_type *fs_type,
+                                      int flags, const char *dev_name, void *data)
+{
+        return get_sb_single(fs_type, flags, data, sel_fill_super);
+}
+
+static struct file_system_type sel_fs_type = {
+        .name           = "selinuxfs",
+        .get_sb         = sel_get_sb,
+        .kill_sb        = kill_litter_super,
+};
+
+struct vfsmount *selinuxfs_mount;
+
+static int __init init_sel_fs(void)
+{
+        int err;
+
+        if (!selinux_enabled)
+                return 0;
+        err = register_filesystem(&sel_fs_type);
+        if (!err) {
+                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)
+{
+        unregister_filesystem(&sel_fs_type);
+}
+#endif