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AppArmor: add initial "features" directory to securityfs

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This adds the "features" subdirectory to the AppArmor securityfs
to display boolean features flags and the known capability mask.

Signed-off-by: Kees Cook <kees@ubuntu.com>
Signed-off-by: John Johansen <john.johansen@canonical.com>
This commit is contained in:
Kees Cook 2012-01-26 16:29:21 -08:00 committed by John Johansen
parent 9acd494be9
commit e74abcf335
2 changed files with 65 additions and 0 deletions
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51
security/apparmor/apparmorfs.c
View File

@ -18,6 +18,7 @@
#include <linux/seq_file.h>
#include <linux/uaccess.h>
#include <linux/namei.h>
#include <linux/capability.h>
#include "include/apparmor.h"
#include "include/apparmorfs.h"
@ -142,12 +143,62 @@ static const struct file_operations aa_fs_profile_remove = {
.llseek = default_llseek,
};
static int aa_fs_seq_show(struct seq_file *seq, void *v)
{
struct aa_fs_entry *fs_file = seq->private;
if (!fs_file)
return 0;
switch (fs_file->v_type) {
case AA_FS_TYPE_BOOLEAN:
seq_printf(seq, "%s\n", fs_file->v.boolean ? "yes" : "no");
break;
case AA_FS_TYPE_U64:
seq_printf(seq, "%#08lx\n", fs_file->v.u64);
break;
default:
/* Ignore unpritable entry types. */
break;
}
return 0;
}
static int aa_fs_seq_open(struct inode *inode, struct file *file)
{
return single_open(file, aa_fs_seq_show, inode->i_private);
}
const struct file_operations aa_fs_seq_file_ops = {
.owner = THIS_MODULE,
.open = aa_fs_seq_open,
.read = seq_read,
.llseek = seq_lseek,
.release = single_release,
};
/** Base file system setup **/
static struct aa_fs_entry aa_fs_entry_domain[] = {
AA_FS_FILE_BOOLEAN("change_hat", 1),
AA_FS_FILE_BOOLEAN("change_hatv", 1),
AA_FS_FILE_BOOLEAN("change_onexec", 1),
AA_FS_FILE_BOOLEAN("change_profile", 1),
{ }
};
static struct aa_fs_entry aa_fs_entry_features[] = {
AA_FS_DIR("domain", aa_fs_entry_domain),
AA_FS_FILE_U64("capability", VFS_CAP_FLAGS_MASK),
{ }
};
static struct aa_fs_entry aa_fs_entry_apparmor[] = {
AA_FS_FILE_FOPS(".load", 0640, &aa_fs_profile_load),
AA_FS_FILE_FOPS(".replace", 0640, &aa_fs_profile_replace),
AA_FS_FILE_FOPS(".remove", 0640, &aa_fs_profile_remove),
AA_FS_DIR("features", aa_fs_entry_features),
{ }
};

14
security/apparmor/include/apparmorfs.h
View File

@ -16,6 +16,8 @@
#define __AA_APPARMORFS_H
enum aa_fs_type {
AA_FS_TYPE_BOOLEAN,
AA_FS_TYPE_U64,
AA_FS_TYPE_FOPS,
AA_FS_TYPE_DIR,
};
@ -28,11 +30,23 @@ struct aa_fs_entry {
umode_t mode;
enum aa_fs_type v_type;
union {
bool boolean;
unsigned long u64;
struct aa_fs_entry *files;
} v;
const struct file_operations *file_ops;
};
extern const struct file_operations aa_fs_seq_file_ops;
#define AA_FS_FILE_BOOLEAN(_name, _value) \
{ .name = (_name), .mode = 0444, \
.v_type = AA_FS_TYPE_BOOLEAN, .v.boolean = (_value), \
.file_ops = &aa_fs_seq_file_ops }
#define AA_FS_FILE_U64(_name, _value) \
{ .name = (_name), .mode = 0444, \
.v_type = AA_FS_TYPE_U64, .v.u64 = (_value), \
.file_ops = &aa_fs_seq_file_ops }
#define AA_FS_FILE_FOPS(_name, _mode, _fops) \
{ .name = (_name), .v_type = AA_FS_TYPE_FOPS, \
.mode = (_mode), .file_ops = (_fops) }