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-rw-r--r--include/linux/key.h11
1 files changed, 11 insertions, 0 deletions
diff --git a/include/linux/key.h b/include/linux/key.h
index 80d677483e31..cd0abb8c9c33 100644
--- a/include/linux/key.h
+++ b/include/linux/key.h
@@ -309,6 +309,17 @@ static inline key_serial_t key_serial(const struct key *key)
extern void key_set_timeout(struct key *, unsigned);
+/*
+ * The permissions required on a key that we're looking up.
+ */
+#define KEY_NEED_VIEW 0x01 /* Require permission to view attributes */
+#define KEY_NEED_READ 0x02 /* Require permission to read content */
+#define KEY_NEED_WRITE 0x04 /* Require permission to update / modify */
+#define KEY_NEED_SEARCH 0x08 /* Require permission to search (keyring) or find (key) */
+#define KEY_NEED_LINK 0x10 /* Require permission to link */
+#define KEY_NEED_SETATTR 0x20 /* Require permission to change attributes */
+#define KEY_NEED_ALL 0x3f /* All the above permissions */
+
/**
* key_is_instantiated - Determine if a key has been positively instantiated
* @key: The key to check.