apparmor: allow introspecting the policy namespace name

Signed-off-by: John Johansen <john.johansen@canonical.com>

diff --git a/security/apparmor/apparmorfs.c b/security/apparmor/apparmorfs.c
index 14b96a44a3f57888eaf4d23a67d37975d56d55a3..9fd7f73a4e86f92d5b5558b11cfe1f4b6400862a 100644 (file)
--- a/security/apparmor/apparmorfs.c
+++ b/security/apparmor/apparmorfs.c
@@ -356,6 +356,7 @@ static const struct file_operations aa_fs_seq_hash_fops = {
        .release        = single_release,
 };
 
+
 static int aa_fs_seq_show_ns_level(struct seq_file *seq, void *v)
 {
        struct aa_ns *ns = aa_current_profile()->ns;
@@ -378,6 +379,28 @@ static const struct file_operations aa_fs_ns_level = {
        .release        = single_release,
 };
 
+static int aa_fs_seq_show_ns_name(struct seq_file *seq, void *v)
+{
+       struct aa_ns *ns = aa_current_profile()->ns;
+
+       seq_printf(seq, "%s\n", ns->base.name);
+
+       return 0;
+}
+
+static int aa_fs_seq_open_ns_name(struct inode *inode, struct file *file)
+{
+       return single_open(file, aa_fs_seq_show_ns_name, inode->i_private);
+}
+
+static const struct file_operations aa_fs_ns_name = {
+       .owner          = THIS_MODULE,
+       .open           = aa_fs_seq_open_ns_name,
+       .read           = seq_read,
+       .llseek         = seq_lseek,
+       .release        = single_release,
+};
+
 /** fns to setup dynamic per profile/namespace files **/
 void __aa_fs_profile_rmdir(struct aa_profile *profile)
 {
@@ -852,6 +875,7 @@ static struct aa_fs_entry aa_fs_entry_apparmor[] = {
        AA_FS_FILE_FOPS(".replace", 0640, &aa_fs_profile_replace),
        AA_FS_FILE_FOPS(".remove", 0640, &aa_fs_profile_remove),
        AA_FS_FILE_FOPS(".ns_level", 0666, &aa_fs_ns_level),
+       AA_FS_FILE_FOPS(".ns_name", 0640, &aa_fs_ns_name),
        AA_FS_FILE_FOPS("profiles", 0640, &aa_fs_profiles_fops),
        AA_FS_DIR("features", aa_fs_entry_features),
        { }