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Diffstat (limited to 'include/linux')
-rw-r--r--include/linux/key-ui.h6
-rw-r--r--include/linux/key.h25
2 files changed, 19 insertions, 12 deletions
diff --git a/include/linux/key-ui.h b/include/linux/key-ui.h
index 60cc7b762e7..159ca8d54e9 100644
--- a/include/linux/key-ui.h
+++ b/include/linux/key-ui.h
@@ -31,8 +31,10 @@ extern spinlock_t key_serial_lock;
* subscribed
*/
struct keyring_list {
- unsigned maxkeys; /* max keys this list can hold */
- unsigned nkeys; /* number of keys currently held */
+ struct rcu_head rcu; /* RCU deletion hook */
+ unsigned short maxkeys; /* max keys this list can hold */
+ unsigned short nkeys; /* number of keys currently held */
+ unsigned short delkey; /* key to be unlinked by RCU */
struct key *keys[0];
};
diff --git a/include/linux/key.h b/include/linux/key.h
index 6aa46d0e812..2c24ffaca86 100644
--- a/include/linux/key.h
+++ b/include/linux/key.h
@@ -18,7 +18,7 @@
#include <linux/types.h>
#include <linux/list.h>
#include <linux/rbtree.h>
-#include <linux/spinlock.h>
+#include <linux/rcupdate.h>
#include <asm/atomic.h>
#ifdef __KERNEL__
@@ -78,7 +78,6 @@ struct key {
key_serial_t serial; /* key serial number */
struct rb_node serial_node;
struct key_type *type; /* type of key */
- rwlock_t lock; /* examination vs change lock */
struct rw_semaphore sem; /* change vs change sem */
struct key_user *user; /* owner of this key */
time_t expiry; /* time at which key expires (or 0) */
@@ -86,14 +85,10 @@ struct key {
gid_t gid;
key_perm_t perm; /* access permissions */
unsigned short quotalen; /* length added to quota */
- unsigned short datalen; /* payload data length */
- unsigned short flags; /* status flags (change with lock writelocked) */
-#define KEY_FLAG_INSTANTIATED 0x00000001 /* set if key has been instantiated */
-#define KEY_FLAG_DEAD 0x00000002 /* set if key type has been deleted */
-#define KEY_FLAG_REVOKED 0x00000004 /* set if key had been revoked */
-#define KEY_FLAG_IN_QUOTA 0x00000008 /* set if key consumes quota */
-#define KEY_FLAG_USER_CONSTRUCT 0x00000010 /* set if key is being constructed in userspace */
-#define KEY_FLAG_NEGATIVE 0x00000020 /* set if key is negative */
+ unsigned short datalen; /* payload data length
+ * - may not match RCU dereferenced payload
+ * - payload should contain own length
+ */
#ifdef KEY_DEBUGGING
unsigned magic;
@@ -101,6 +96,14 @@ struct key {
#define KEY_DEBUG_MAGIC_X 0xf8e9dacbu
#endif
+ unsigned long flags; /* status flags (change with bitops) */
+#define KEY_FLAG_INSTANTIATED 0 /* set if key has been instantiated */
+#define KEY_FLAG_DEAD 1 /* set if key type has been deleted */
+#define KEY_FLAG_REVOKED 2 /* set if key had been revoked */
+#define KEY_FLAG_IN_QUOTA 3 /* set if key consumes quota */
+#define KEY_FLAG_USER_CONSTRUCT 4 /* set if key is being constructed in userspace */
+#define KEY_FLAG_NEGATIVE 5 /* set if key is negative */
+
/* the description string
* - this is used to match a key against search criteria
* - this should be a printable string
@@ -250,6 +253,8 @@ extern int keyring_add_key(struct key *keyring,
extern struct key *key_lookup(key_serial_t id);
+extern void keyring_replace_payload(struct key *key, void *replacement);
+
#define key_serial(key) ((key) ? (key)->serial : 0)
/*