linux-kernel - [PATCH 3/4] AppArmor: add "file" details to securityfs

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Message-Id: <1327624163-21576-4-git-send-email-kees@ubuntu.com>
Date:	Thu, 26 Jan 2012 16:29:22 -0800
From:	Kees Cook <kees@...ntu.com>
To:	linux-security-module@...r.kernel.org
Cc:	linux-kernel@...r.kernel.org,
	John Johansen <john.johansen@...onical.com>
Subject: [PATCH 3/4] AppArmor: add "file" details to securityfs

Create the "file" directory in the securityfs for tracking features
related to files.

Signed-off-by: Kees Cook <kees@...ntu.com>
---
 security/apparmor/apparmorfs.c         |   10 ++++++++++
 security/apparmor/include/apparmorfs.h |    6 ++++++
 2 files changed, 16 insertions(+), 0 deletions(-)

diff --git a/security/apparmor/apparmorfs.c b/security/apparmor/apparmorfs.c
index 36efe64..68ce771 100644
--- a/security/apparmor/apparmorfs.c
+++ b/security/apparmor/apparmorfs.c
@@ -154,6 +154,9 @@ static int aa_fs_seq_show(struct seq_file *seq, void *v)
 	case AA_FS_TYPE_BOOLEAN:
 		seq_printf(seq, "%s\n", fs_file->v.boolean ? "yes" : "no");
 		break;
+	case AA_FS_TYPE_STRING:
+		seq_printf(seq, "%s\n", fs_file->v.string);
+		break;
 	case AA_FS_TYPE_U64:
 		seq_printf(seq, "%#08lx\n", fs_file->v.u64);
 		break;
@@ -180,6 +183,12 @@ const struct file_operations aa_fs_seq_file_ops = {
 
 /** Base file system setup **/
 
+static struct aa_fs_entry aa_fs_entry_file[] = {
+	AA_FS_FILE_STRING("mask", "create read write exec append mmap_exec " \
+				  "link lock"),
+	{ }
+};
+
 static struct aa_fs_entry aa_fs_entry_domain[] = {
 	AA_FS_FILE_BOOLEAN("change_hat",	1),
 	AA_FS_FILE_BOOLEAN("change_hatv",	1),
@@ -190,6 +199,7 @@ static struct aa_fs_entry aa_fs_entry_domain[] = {
 
 static struct aa_fs_entry aa_fs_entry_features[] = {
 	AA_FS_DIR("domain",			aa_fs_entry_domain),
+	AA_FS_DIR("file",			aa_fs_entry_file),
 	AA_FS_FILE_BOOLEAN("namespaces",	1),
 	AA_FS_FILE_U64("capability",		VFS_CAP_FLAGS_MASK),
 	{ }
diff --git a/security/apparmor/include/apparmorfs.h b/security/apparmor/include/apparmorfs.h
index 16e6545..7ea4769 100644
--- a/security/apparmor/include/apparmorfs.h
+++ b/security/apparmor/include/apparmorfs.h
@@ -17,6 +17,7 @@
 
 enum aa_fs_type {
 	AA_FS_TYPE_BOOLEAN,
+	AA_FS_TYPE_STRING,
 	AA_FS_TYPE_U64,
 	AA_FS_TYPE_FOPS,
 	AA_FS_TYPE_DIR,
@@ -31,6 +32,7 @@ struct aa_fs_entry {
 	enum aa_fs_type v_type;
 	union {
 		bool boolean;
+		char *string;
 		unsigned long u64;
 		struct aa_fs_entry *files;
 	} v;
@@ -43,6 +45,10 @@ extern const struct file_operations aa_fs_seq_file_ops;
 	{ .name = (_name), .mode = 0444, \
 	  .v_type = AA_FS_TYPE_BOOLEAN, .v.boolean = (_value), \
 	  .file_ops = &aa_fs_seq_file_ops }
+#define AA_FS_FILE_STRING(_name, _value) \
+	{ .name = (_name), .mode = 0444, \
+	  .v_type = AA_FS_TYPE_STRING, .v.string = (_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), \
-- 
1.7.0.4

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