/* Updated: Karl MacMillan <kmacmillan@tresys.com>
*
- * Added conditional policy language extensions
+ * Added conditional policy language extensions
*
+ * Updated: Hewlett-Packard <paul.moore@hp.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
+ * it under the terms of the GNU General Public License as published by
* the Free Software Foundation, version 2.
*/
#include <linux/seq_file.h>
#include <linux/percpu.h>
#include <linux/audit.h>
-#include <asm/uaccess.h>
-#include <asm/semaphore.h>
+#include <linux/uaccess.h>
/* selinuxfs pseudo filesystem for exporting the security policy API.
Based on the proc code and the fs/nfsd/nfsctl.c code. */
#include "objsec.h"
#include "conditional.h"
+/* Policy capability filenames */
+static char *policycap_names[] = {
+ "network_peer_controls",
+ "open_perms"
+};
+
unsigned int selinux_checkreqprot = CONFIG_SECURITY_SELINUX_CHECKREQPROT_VALUE;
#ifdef CONFIG_SECURITY_SELINUX_ENABLE_SECMARK_DEFAULT
static int __init checkreqprot_setup(char *str)
{
- selinux_checkreqprot = simple_strtoul(str,NULL,0) ? 1 : 0;
+ unsigned long checkreqprot;
+ if (!strict_strtoul(str, 0, &checkreqprot))
+ selinux_checkreqprot = checkreqprot ? 1 : 0;
return 1;
}
__setup("checkreqprot=", checkreqprot_setup);
static int __init selinux_compat_net_setup(char *str)
{
- selinux_compat_net = simple_strtoul(str,NULL,0) ? 1 : 0;
+ unsigned long compat_net;
+ if (!strict_strtoul(str, 0, &compat_net))
+ selinux_compat_net = compat_net ? 1 : 0;
return 1;
}
__setup("selinux_compat_net=", selinux_compat_net_setup);
static DEFINE_MUTEX(sel_mutex);
/* global data for booleans */
-static struct dentry *bool_dir = NULL;
-static int bool_num = 0;
-static int *bool_pending_values = NULL;
+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;
+
+/* global data for policy capabilities */
+static struct dentry *policycap_dir;
extern void selnl_notify_setenforce(int val);
static int task_has_security(struct task_struct *tsk,
u32 perms)
{
- struct task_security_struct *tsec;
-
- tsec = tsk->security;
+ 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(tsec->sid, SECINITSID_SECURITY,
+ return avc_has_perm(sid, SECINITSID_SECURITY,
SECCLASS_SECURITY, perms, NULL);
}
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 */
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_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)
}
#ifdef CONFIG_SECURITY_SELINUX_DEVELOP
-static ssize_t sel_write_enforce(struct file * file, const char __user * buf,
+static ssize_t sel_write_enforce(struct file *file, const char __user *buf,
size_t count, loff_t *ppos)
{
/* No partial writes. */
return -EINVAL;
}
- page = (char*)get_zeroed_page(GFP_KERNEL);
+ page = (char *)get_zeroed_page(GFP_KERNEL);
if (!page)
return -ENOMEM;
length = -EFAULT;
if (length)
goto out;
audit_log(current->audit_context, GFP_KERNEL, AUDIT_MAC_STATUS,
- "enforcing=%d old_enforcing=%d auid=%u", new_value,
- selinux_enforcing,
- audit_get_loginuid(current->audit_context));
+ "enforcing=%d old_enforcing=%d auid=%u ses=%u",
+ new_value, selinux_enforcing,
+ audit_get_loginuid(current),
+ audit_get_sessionid(current));
selinux_enforcing = new_value;
if (selinux_enforcing)
avc_ss_reset(0);
#define sel_write_enforce NULL
#endif
-static struct file_operations sel_enforce_ops = {
+static const struct file_operations sel_enforce_ops = {
.read = sel_read_enforce,
.write = sel_write_enforce,
};
+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 = filp->f_path.dentry->d_inode->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,
+};
+
#ifdef CONFIG_SECURITY_SELINUX_DISABLE
-static ssize_t sel_write_disable(struct file * file, const char __user * buf,
+static ssize_t sel_write_disable(struct file *file, const char __user *buf,
size_t count, loff_t *ppos)
{
/* No partial writes. */
return -EINVAL;
}
- page = (char*)get_zeroed_page(GFP_KERNEL);
+ page = (char *)get_zeroed_page(GFP_KERNEL);
if (!page)
return -ENOMEM;
length = -EFAULT;
if (length < 0)
goto out;
audit_log(current->audit_context, GFP_KERNEL, AUDIT_MAC_STATUS,
- "selinux=0 auid=%u",
- audit_get_loginuid(current->audit_context));
+ "selinux=0 auid=%u ses=%u",
+ audit_get_loginuid(current),
+ audit_get_sessionid(current));
}
length = count;
#define sel_write_disable NULL
#endif
-static struct file_operations sel_disable_ops = {
+static const 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)
+ size_t count, loff_t *ppos)
{
char tmpbuf[TMPBUFLEN];
ssize_t length;
return simple_read_from_buffer(buf, count, ppos, tmpbuf, length);
}
-static struct file_operations sel_policyvers_ops = {
+static const struct file_operations sel_policyvers_ops = {
.read = sel_read_policyvers,
};
/* 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 int sel_make_dir(struct inode *dir, struct dentry *dentry,
+ unsigned long *ino);
static ssize_t sel_read_mls(struct file *filp, char __user *buf,
size_t count, loff_t *ppos)
return simple_read_from_buffer(buf, count, ppos, tmpbuf, length);
}
-static struct file_operations sel_mls_ops = {
+static const struct file_operations sel_mls_ops = {
.read = sel_read_mls,
};
-static ssize_t sel_write_load(struct file * file, const char __user * buf,
+static ssize_t sel_write_load(struct file *file, const char __user *buf,
size_t count, loff_t *ppos)
{
goto out;
ret = sel_make_bools();
+ if (ret) {
+ length = ret;
+ goto out1;
+ }
+
+ ret = sel_make_classes();
+ if (ret) {
+ length = ret;
+ goto out1;
+ }
+
+ ret = sel_make_policycap();
if (ret)
length = ret;
else
length = count;
+
+out1:
audit_log(current->audit_context, GFP_KERNEL, AUDIT_MAC_POLICY_LOAD,
- "policy loaded auid=%u",
- audit_get_loginuid(current->audit_context));
+ "policy loaded auid=%u ses=%u",
+ audit_get_loginuid(current),
+ audit_get_sessionid(current));
out:
mutex_unlock(&sel_mutex);
vfree(data);
return length;
}
-static struct file_operations sel_load_ops = {
+static const struct file_operations sel_load_ops = {
.write = sel_write_load,
};
-static ssize_t sel_write_context(struct file * file, char *buf, size_t size)
+static ssize_t sel_write_context(struct file *file, char *buf, size_t size)
{
char *canon;
u32 sid, len;
return length;
if (len > SIMPLE_TRANSACTION_LIMIT) {
- printk(KERN_ERR "%s: context size (%u) exceeds payload "
- "max\n", __FUNCTION__, len);
+ printk(KERN_ERR "SELinux: %s: context size (%u) exceeds "
+ "payload max\n", __func__, len);
length = -ERANGE;
goto out;
}
return simple_read_from_buffer(buf, count, ppos, tmpbuf, length);
}
-static ssize_t sel_write_checkreqprot(struct file * file, const char __user * buf,
+static ssize_t sel_write_checkreqprot(struct file *file, const char __user *buf,
size_t count, loff_t *ppos)
{
char *page;
/* No partial writes. */
return -EINVAL;
}
- page = (char*)get_zeroed_page(GFP_KERNEL);
+ page = (char *)get_zeroed_page(GFP_KERNEL);
if (!page)
return -ENOMEM;
length = -EFAULT;
free_page((unsigned long) page);
return length;
}
-static struct file_operations sel_checkreqprot_ops = {
+static const struct file_operations sel_checkreqprot_ops = {
.read = sel_read_checkreqprot,
.write = sel_write_checkreqprot,
};
return simple_read_from_buffer(buf, count, ppos, tmpbuf, length);
}
-static ssize_t sel_write_compat_net(struct file * file, const char __user * buf,
+static ssize_t sel_write_compat_net(struct file *file, const char __user *buf,
size_t count, loff_t *ppos)
{
char *page;
/* No partial writes. */
return -EINVAL;
}
- page = (char*)get_zeroed_page(GFP_KERNEL);
+ page = (char *)get_zeroed_page(GFP_KERNEL);
if (!page)
return -ENOMEM;
length = -EFAULT;
free_page((unsigned long) page);
return length;
}
-static struct file_operations sel_compat_net_ops = {
+static const struct file_operations sel_compat_net_ops = {
.read = sel_read_compat_net,
.write = sel_write_compat_net,
};
/*
* 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 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,
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;
+ ino_t ino = file->f_path.dentry->d_inode->i_ino;
char *data;
ssize_t rv;
if (IS_ERR(data))
return PTR_ERR(data);
- rv = write_op[ino](file, data, size);
- if (rv>0) {
+ 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 = {
+static const struct file_operations transaction_ops = {
.write = selinux_transaction_write,
.read = simple_transaction_read,
.release = simple_transaction_release,
* and the length returned. Otherwise return 0 or and -error.
*/
-static ssize_t sel_write_access(struct file * file, char *buf, size_t size)
+static ssize_t sel_write_access(struct file *file, char *buf, size_t size)
{
char *scon, *tcon;
u32 ssid, tsid;
return length;
}
-static ssize_t sel_write_create(struct file * file, char *buf, size_t size)
+static ssize_t sel_write_create(struct file *file, char *buf, size_t size)
{
char *scon, *tcon;
u32 ssid, tsid, newsid;
goto out2;
if (len > SIMPLE_TRANSACTION_LIMIT) {
- printk(KERN_ERR "%s: context size (%u) exceeds payload "
- "max\n", __FUNCTION__, len);
+ printk(KERN_ERR "SELinux: %s: context size (%u) exceeds "
+ "payload max\n", __func__, len);
length = -ERANGE;
goto out3;
}
return length;
}
-static ssize_t sel_write_relabel(struct file * file, char *buf, size_t size)
+static ssize_t sel_write_relabel(struct file *file, char *buf, size_t size)
{
char *scon, *tcon;
u32 ssid, tsid, newsid;
return length;
}
-static ssize_t sel_write_user(struct file * file, char *buf, size_t size)
+static ssize_t sel_write_user(struct file *file, char *buf, size_t size)
{
char *con, *user, *ptr;
u32 sid, *sids;
return length;
}
-static ssize_t sel_write_member(struct file * file, char *buf, size_t size)
+static ssize_t sel_write_member(struct file *file, char *buf, size_t size)
{
char *scon, *tcon;
u32 ssid, tsid, newsid;
goto out2;
if (len > SIMPLE_TRANSACTION_LIMIT) {
- printk(KERN_ERR "%s: context size (%u) exceeds payload "
- "max\n", __FUNCTION__, len);
+ printk(KERN_ERR "SELinux: %s: context size (%u) exceeds "
+ "payload max\n", __func__, len);
length = -ERANGE;
goto out3;
}
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)
{
ssize_t length;
ssize_t ret;
int cur_enforcing;
- struct inode *inode;
+ struct inode *inode = filep->f_path.dentry->d_inode;
+ unsigned index = inode->i_ino & SEL_INO_MASK;
+ const char *name = filep->f_path.dentry->d_name.name;
mutex_lock(&sel_mutex);
- ret = -EFAULT;
-
- /* check to see if this file has been deleted */
- if (!filep->f_op)
+ if (index >= bool_num || strcmp(name, bool_pending_names[index])) {
+ ret = -EINVAL;
goto out;
+ }
if (count > PAGE_SIZE) {
ret = -EINVAL;
goto out;
}
- if (!(page = (char*)get_zeroed_page(GFP_KERNEL))) {
+ page = (char *)get_zeroed_page(GFP_KERNEL);
+ if (!page) {
ret = -ENOMEM;
goto out;
}
- inode = filep->f_dentry->d_inode;
- cur_enforcing = security_get_bool_value(inode->i_ino - BOOL_INO_OFFSET);
+ 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[inode->i_ino - BOOL_INO_OFFSET]);
+ bool_pending_values[index]);
ret = simple_read_from_buffer(buf, count, ppos, page, length);
out:
mutex_unlock(&sel_mutex);
size_t count, loff_t *ppos)
{
char *page = NULL;
- ssize_t length = -EFAULT;
+ ssize_t length;
int new_value;
- struct inode *inode;
+ struct inode *inode = filep->f_path.dentry->d_inode;
+ unsigned index = inode->i_ino & SEL_INO_MASK;
+ const char *name = filep->f_path.dentry->d_name.name;
mutex_lock(&sel_mutex);
if (length)
goto out;
- /* check to see if this file has been deleted */
- if (!filep->f_op)
+ if (index >= bool_num || strcmp(name, bool_pending_names[index])) {
+ length = -EINVAL;
goto out;
+ }
if (count >= PAGE_SIZE) {
length = -ENOMEM;
goto out;
}
+
if (*ppos != 0) {
/* No partial writes. */
+ length = -EINVAL;
goto out;
}
- page = (char*)get_zeroed_page(GFP_KERNEL);
+ page = (char *)get_zeroed_page(GFP_KERNEL);
if (!page) {
length = -ENOMEM;
goto out;
}
+ length = -EFAULT;
if (copy_from_user(page, buf, count))
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;
+ bool_pending_values[index] = new_value;
length = count;
out:
return length;
}
-static struct file_operations sel_bool_ops = {
- .read = sel_read_bool,
- .write = sel_write_bool,
+static const struct file_operations sel_bool_ops = {
+ .read = sel_read_bool,
+ .write = sel_write_bool,
};
static ssize_t sel_commit_bools_write(struct file *filep,
size_t count, loff_t *ppos)
{
char *page = NULL;
- ssize_t length = -EFAULT;
+ ssize_t length;
int new_value;
mutex_lock(&sel_mutex);
if (length)
goto out;
- /* check to see if this file has been deleted */
- if (!filep->f_op)
- goto out;
-
if (count >= PAGE_SIZE) {
length = -ENOMEM;
goto out;
/* No partial writes. */
goto out;
}
- page = (char*)get_zeroed_page(GFP_KERNEL);
+ page = (char *)get_zeroed_page(GFP_KERNEL);
if (!page) {
length = -ENOMEM;
goto out;
}
+ length = -EFAULT;
if (copy_from_user(page, buf, count))
goto out;
if (sscanf(page, "%d", &new_value) != 1)
goto out;
- if (new_value && bool_pending_values) {
+ if (new_value && bool_pending_values)
security_set_bools(bool_num, bool_pending_values);
- }
length = count;
return length;
}
-static struct file_operations sel_commit_bools_ops = {
- .write = sel_commit_bools_write,
+static const 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)
+static void sel_remove_entries(struct dentry *de)
{
- struct list_head *p, *node;
- struct super_block *sb = de->d_sb;
+ struct list_head *node;
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_u.fu_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"
u32 sid;
/* remove any existing files */
+ kfree(bool_pending_names);
kfree(bool_pending_values);
+ bool_pending_names = NULL;
bool_pending_values = NULL;
- sel_remove_bools(dir);
+ sel_remove_entries(dir);
- if (!(page = (char*)get_zeroed_page(GFP_KERNEL)))
+ page = (char *)get_zeroed_page(GFP_KERNEL);
+ if (!page)
return -ENOMEM;
ret = security_get_bools(&num, &names, &values);
ret = -ENAMETOOLONG;
goto err;
}
- isec = (struct inode_security_struct*)inode->i_security;
- if ((ret = security_genfs_sid("selinuxfs", page, SECCLASS_FILE, &sid)))
+ isec = (struct inode_security_struct *)inode->i_security;
+ ret = security_genfs_sid("selinuxfs", page, SECCLASS_FILE, &sid);
+ if (ret)
goto err;
isec->sid = sid;
isec->initialized = 1;
inode->i_fop = &sel_bool_ops;
- inode->i_ino = i + BOOL_INO_OFFSET;
+ inode->i_ino = i|SEL_BOOL_INO_OFFSET;
d_add(dentry, inode);
}
bool_num = num;
+ bool_pending_names = names;
bool_pending_values = values;
out:
free_page((unsigned long)page);
+ return ret;
+err:
if (names) {
for (i = 0; i < num; i++)
kfree(names[i]);
kfree(names);
}
- return ret;
-err:
kfree(values);
- sel_remove_bools(dir);
+ sel_remove_entries(dir);
ret = -ENOMEM;
goto out;
}
#define NULL_FILE_NAME "null"
-struct dentry *selinux_null = NULL;
+struct dentry *selinux_null;
static ssize_t sel_read_avc_cache_threshold(struct file *filp, char __user *buf,
size_t count, loff_t *ppos)
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,
+static ssize_t sel_write_avc_cache_threshold(struct file *file,
+ const char __user *buf,
size_t count, loff_t *ppos)
{
goto out;
}
- page = (char*)get_zeroed_page(GFP_KERNEL);
+ page = (char *)get_zeroed_page(GFP_KERNEL);
if (!page) {
ret = -ENOMEM;
goto out;
return ret;
}
-static struct file_operations sel_avc_cache_threshold_ops = {
+static const 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 = {
+static const struct file_operations sel_avc_hash_stats_ops = {
.read = sel_read_avc_hash_stats,
};
{
int cpu;
- for (cpu = *idx; cpu < NR_CPUS; ++cpu) {
+ for (cpu = *idx; cpu < nr_cpu_ids; ++cpu) {
if (!cpu_possible(cpu))
continue;
*idx = cpu + 1;
static void sel_avc_stats_seq_stop(struct seq_file *seq, void *v)
{ }
-static struct seq_operations sel_avc_cache_stats_seq_ops = {
+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,
return seq_open(file, &sel_avc_cache_stats_seq_ops);
}
-static struct file_operations sel_avc_cache_stats_ops = {
+static const struct file_operations sel_avc_cache_stats_ops = {
.open = sel_open_avc_cache_stats,
.read = seq_read,
.llseek = seq_lseek,
goto out;
}
inode->i_fop = files[i].ops;
+ inode->i_ino = ++sel_last_ino;
d_add(dentry, inode);
}
out:
return ret;
}
-static int sel_make_dir(struct inode *dir, struct dentry *dentry)
+static ssize_t sel_read_initcon(struct file *file, char __user *buf,
+ size_t count, loff_t *ppos)
+{
+ struct inode *inode;
+ char *con;
+ u32 sid, len;
+ ssize_t ret;
+
+ inode = file->f_path.dentry->d_inode;
+ sid = inode->i_ino&SEL_INO_MASK;
+ ret = security_sid_to_context(sid, &con, &len);
+ if (ret < 0)
+ 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,
+};
+
+static int sel_make_initcon_files(struct dentry *dir)
+{
+ int i, ret = 0;
+
+ 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) {
+ ret = -ENOMEM;
+ goto out;
+ }
+
+ inode = sel_make_inode(dir->d_sb, S_IFREG|S_IRUGO);
+ if (!inode) {
+ ret = -ENOMEM;
+ goto out;
+ }
+ inode->i_fop = &sel_initcon_ops;
+ inode->i_ino = i|SEL_INITCON_INO_OFFSET;
+ d_add(dentry, inode);
+ }
+out:
+ return ret;
+}
+
+static inline unsigned int sel_div(unsigned long a, unsigned long b)
+{
+ return a / b - (a % b < 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 sel_div(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)
+{
+ ssize_t rc, len;
+ char *page;
+ unsigned long ino = file->f_path.dentry->d_inode->i_ino;
+
+ page = (char *)__get_free_page(GFP_KERNEL);
+ if (!page) {
+ rc = -ENOMEM;
+ goto out;
+ }
+
+ len = snprintf(page, PAGE_SIZE, "%d", sel_ino_to_class(ino));
+ rc = simple_read_from_buffer(buf, count, ppos, page, len);
+ free_page((unsigned long)page);
+out:
+ return rc;
+}
+
+static const struct file_operations sel_class_ops = {
+ .read = sel_read_class,
+};
+
+static ssize_t sel_read_perm(struct file *file, char __user *buf,
+ size_t count, loff_t *ppos)
+{
+ ssize_t rc, len;
+ char *page;
+ unsigned long ino = file->f_path.dentry->d_inode->i_ino;
+
+ page = (char *)__get_free_page(GFP_KERNEL);
+ if (!page) {
+ rc = -ENOMEM;
+ goto out;
+ }
+
+ len = snprintf(page, PAGE_SIZE, "%d", sel_ino_to_perm(ino));
+ rc = simple_read_from_buffer(buf, count, ppos, page, len);
+ free_page((unsigned long)page);
+out:
+ return rc;
+}
+
+static const struct file_operations sel_perm_ops = {
+ .read = sel_read_perm,
+};
+
+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->f_path.dentry->d_inode->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,
+};
+
+static int sel_make_perm_files(char *objclass, int classvalue,
+ struct dentry *dir)
+{
+ int i, rc = 0, nperms;
+ char **perms;
+
+ rc = security_get_permissions(objclass, &perms, &nperms);
+ if (rc)
+ goto out;
+
+ for (i = 0; i < nperms; i++) {
+ struct inode *inode;
+ struct dentry *dentry;
+
+ dentry = d_alloc_name(dir, perms[i]);
+ if (!dentry) {
+ rc = -ENOMEM;
+ goto out1;
+ }
+
+ inode = sel_make_inode(dir->d_sb, S_IFREG|S_IRUGO);
+ if (!inode) {
+ rc = -ENOMEM;
+ goto out1;
+ }
+ 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);
+ }
+
+out1:
+ for (i = 0; i < nperms; i++)
+ kfree(perms[i]);
+ kfree(perms);
+out:
+ 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) {
+ rc = -ENOMEM;
+ goto out;
+ }
+
+ inode = sel_make_inode(dir->d_sb, S_IFREG|S_IRUGO);
+ if (!inode) {
+ rc = -ENOMEM;
+ goto out;
+ }
+
+ inode->i_fop = &sel_class_ops;
+ inode->i_ino = sel_class_to_ino(index);
+ d_add(dentry, inode);
+
+ dentry = d_alloc_name(dir, "perms");
+ if (!dentry) {
+ rc = -ENOMEM;
+ goto out;
+ }
+
+ rc = sel_make_dir(dir->d_inode, dentry, &last_class_ino);
+ if (rc)
+ goto out;
+
+ rc = sel_make_perm_files(classname, index, dentry);
+
+out:
+ return rc;
+}
+
+static void sel_remove_classes(void)
+{
+ struct list_head *class_node;
+
+ list_for_each(class_node, &class_dir->d_subdirs) {
+ struct dentry *class_subdir = list_entry(class_node,
+ struct dentry, d_u.d_child);
+ struct list_head *class_subdir_node;
+
+ list_for_each(class_subdir_node, &class_subdir->d_subdirs) {
+ struct dentry *d = list_entry(class_subdir_node,
+ struct dentry, d_u.d_child);
+
+ if (d->d_inode)
+ if (d->d_inode->i_mode & S_IFDIR)
+ sel_remove_entries(d);
+ }
+
+ sel_remove_entries(class_subdir);
+ }
+
+ sel_remove_entries(class_dir);
+}
+
+static int sel_make_classes(void)
+{
+ int rc = 0, nclasses, i;
+ char **classes;
+
+ /* delete any existing entries */
+ sel_remove_classes();
+
+ rc = security_get_classes(&classes, &nclasses);
+ if (rc < 0)
+ goto out;
+
+ /* +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 = d_alloc_name(class_dir, classes[i]);
+ if (!class_name_dir) {
+ rc = -ENOMEM;
+ goto out1;
+ }
+
+ rc = sel_make_dir(class_dir->d_inode, class_name_dir,
+ &last_class_ino);
+ if (rc)
+ goto out1;
+
+ /* i+1 since class values are 1-indexed */
+ rc = sel_make_class_dir_entries(classes[i], i+1,
+ class_name_dir);
+ if (rc)
+ goto out1;
+ }
+
+out1:
+ for (i = 0; i < nclasses; i++)
+ kfree(classes[i]);
+ kfree(classes);
+out:
+ 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 int sel_make_dir(struct inode *dir, struct dentry *dentry,
+ unsigned long *ino)
{
int ret = 0;
struct inode *inode;
}
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) */
- inode->i_nlink++;
+ inc_nlink(inode);
d_add(dentry, inode);
/* bump link count on parent directory, too */
- dir->i_nlink++;
+ inc_nlink(dir);
out:
return ret;
}
-static int sel_fill_super(struct super_block * sb, void * data, int silent)
+static int sel_fill_super(struct super_block *sb, void *data, int silent)
{
int ret;
struct dentry *dentry;
[SEL_MEMBER] = {"member", &transaction_ops, S_IRUGO|S_IWUGO},
[SEL_CHECKREQPROT] = {"checkreqprot", &sel_checkreqprot_ops, S_IRUGO|S_IWUSR},
[SEL_COMPAT_NET] = {"compat_net", &sel_compat_net_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},
/* last one */ {""}
};
ret = simple_fill_super(sb, SELINUX_MAGIC, selinux_files);
goto err;
}
- ret = sel_make_dir(root_inode, dentry);
+ ret = sel_make_dir(root_inode, dentry, &sel_last_ino);
if (ret)
goto err;
ret = -ENOMEM;
goto err;
}
- isec = (struct inode_security_struct*)inode->i_security;
+ 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;
goto err;
}
- ret = sel_make_dir(root_inode, dentry);
+ ret = sel_make_dir(root_inode, dentry, &sel_last_ino);
if (ret)
goto err;
ret = sel_make_avc_files(dentry);
if (ret)
goto err;
+
+ dentry = d_alloc_name(sb->s_root, "initial_contexts");
+ if (!dentry) {
+ ret = -ENOMEM;
+ goto err;
+ }
+
+ ret = sel_make_dir(root_inode, dentry, &sel_last_ino);
+ if (ret)
+ goto err;
+
+ ret = sel_make_initcon_files(dentry);
+ if (ret)
+ goto err;
+
+ dentry = d_alloc_name(sb->s_root, "class");
+ if (!dentry) {
+ ret = -ENOMEM;
+ goto err;
+ }
+
+ ret = sel_make_dir(root_inode, dentry, &sel_last_ino);
+ if (ret)
+ goto err;
+
+ class_dir = dentry;
+
+ dentry = d_alloc_name(sb->s_root, "policy_capabilities");
+ if (!dentry) {
+ ret = -ENOMEM;
+ goto err;
+ }
+
+ ret = sel_make_dir(root_inode, dentry, &sel_last_ino);
+ if (ret)
+ goto err;
+
+ policycap_dir = dentry;
+
out:
return ret;
err:
- printk(KERN_ERR "%s: failed while creating inodes\n", __FUNCTION__);
+ printk(KERN_ERR "SELinux: %s: failed while creating inodes\n",
+ __func__);
goto out;
}
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff