apparmor: export set of capabilities supported by the apparmor module

Signed-off-by: John Johansen <john.johansen@canonical.com>
Acked-by: Seth Arnold <seth.arnold@canonical.com>

diff --git a/security/apparmor/Makefile b/security/apparmor/Makefile
index 5706b74..0831e04 100644 (file)
--- a/security/apparmor/Makefile
+++ b/security/apparmor/Makefile
@@ -18,7 +18,11 @@ quiet_cmd_make-caps = GEN     $@
 cmd_make-caps = echo "static const char *const capability_names[] = {" > $@ ;\
        sed $< >>$@ -r -n -e '/CAP_FS_MASK/d' \
        -e 's/^\#define[ \t]+CAP_([A-Z0-9_]+)[ \t]+([0-9]+)/[\2] = "\L\1",/p';\
-       echo "};" >> $@
+       echo "};" >> $@ ;\
+       echo -n '\#define AA_FS_CAPS_MASK "' >> $@ ;\
+       sed $< -r -n -e '/CAP_FS_MASK/d' \
+           -e 's/^\#define[ \t]+CAP_([A-Z0-9_]+)[ \t]+([0-9]+)/\L\1/p' | \
+            tr '\n' ' ' | sed -e 's/ $$/"\n/' >> $@
 
 
 # Build a lower case string table of rlimit names.

diff --git a/security/apparmor/apparmorfs.c b/security/apparmor/apparmorfs.c
index 7a26608..d708a55 100644 (file)
--- a/security/apparmor/apparmorfs.c
+++ b/security/apparmor/apparmorfs.c
@@ -773,6 +773,7 @@ static struct aa_fs_entry aa_fs_entry_features[] = {
        AA_FS_DIR("file",                       aa_fs_entry_file),
        AA_FS_FILE_U64("capability",            VFS_CAP_FLAGS_MASK),
        AA_FS_DIR("rlimit",                     aa_fs_entry_rlimit),
+       AA_FS_DIR("caps",                       aa_fs_entry_caps),
        { }
 };
 

diff --git a/security/apparmor/capability.c b/security/apparmor/capability.c
index 887a5e9..84d1f5f 100644 (file)
--- a/security/apparmor/capability.c
+++ b/security/apparmor/capability.c
@@ -27,6 +27,11 @@
  */
 #include "capability_names.h"
 
+struct aa_fs_entry aa_fs_entry_caps[] = {
+       AA_FS_FILE_STRING("mask", AA_FS_CAPS_MASK),
+       { }
+};
+
 struct audit_cache {
        struct aa_profile *profile;
        kernel_cap_t caps;

diff --git a/security/apparmor/include/capability.h b/security/apparmor/include/capability.h
index c24d295..2e7c9d6 100644 (file)
--- a/security/apparmor/include/capability.h
+++ b/security/apparmor/include/capability.h
@@ -17,6 +17,8 @@
 
 #include <linux/sched.h>
 
+#include "apparmorfs.h"
+
 struct aa_profile;
 
 /* aa_caps - confinement data for capabilities
@@ -34,6 +36,8 @@ struct aa_caps {
        kernel_cap_t extended;
 };
 
+extern struct aa_fs_entry aa_fs_entry_caps[];
+
 int aa_capable(struct task_struct *task, struct aa_profile *profile, int cap,
               int audit);