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authorDavid Howells <dhowells@redhat.com>2008-11-14 10:39:20 +1100
committerJames Morris <jmorris@namei.org>2008-11-14 10:39:20 +1100
commitbb952bb98a7e479262c7eb25d5592545a3af147d (patch)
tree9a2158c07a22a5fbddcec412944d2e7534eecc8f /include/linux/cred.h
parent275bb41e9d058fbb327e7642f077e1beaeac162e (diff)
downloadlinux-bb952bb98a7e479262c7eb25d5592545a3af147d.tar.gz
CRED: Separate per-task-group keyrings from signal_struct
Separate per-task-group keyrings from signal_struct and dangle their anchor from the cred struct rather than the signal_struct. Signed-off-by: David Howells <dhowells@redhat.com> Reviewed-by: James Morris <jmorris@namei.org> Signed-off-by: James Morris <jmorris@namei.org>
Diffstat (limited to 'include/linux/cred.h')
-rw-r--r--include/linux/cred.h16
1 files changed, 16 insertions, 0 deletions
diff --git a/include/linux/cred.h b/include/linux/cred.h
index 166ce4ddba6..62b9e532422 100644
--- a/include/linux/cred.h
+++ b/include/linux/cred.h
@@ -72,6 +72,21 @@ extern int in_group_p(gid_t);
extern int in_egroup_p(gid_t);
/*
+ * The common credentials for a thread group
+ * - shared by CLONE_THREAD
+ */
+#ifdef CONFIG_KEYS
+struct thread_group_cred {
+ atomic_t usage;
+ pid_t tgid; /* thread group process ID */
+ spinlock_t lock;
+ struct key *session_keyring; /* keyring inherited over fork */
+ struct key *process_keyring; /* keyring private to this process */
+ struct rcu_head rcu; /* RCU deletion hook */
+};
+#endif
+
+/*
* The security context of a task
*
* The parts of the context break down into two categories:
@@ -114,6 +129,7 @@ struct cred {
* keys to */
struct key *thread_keyring; /* keyring private to this thread */
struct key *request_key_auth; /* assumed request_key authority */
+ struct thread_group_cred *tgcred; /* thread-group shared credentials */
#endif
#ifdef CONFIG_SECURITY
void *security; /* subjective LSM security */