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-rw-r--r--include/linux/key-type.h31
1 files changed, 28 insertions, 3 deletions
diff --git a/include/linux/key-type.h b/include/linux/key-type.h
index 44792ee649de..8aba688a451a 100644
--- a/include/linux/key-type.h
+++ b/include/linux/key-type.h
@@ -53,6 +53,22 @@ typedef int (*request_key_actor_t)(struct key_construction *key,
const char *op, void *aux);
/*
+ * Preparsed matching criterion.
+ */
+struct key_match_data {
+ /* Comparison function, defaults to type->match, but can be replaced by
+ * type->match_preparse(). */
+ int (*cmp)(const struct key *key,
+ const struct key_match_data *match_data);
+
+ const void *raw_data; /* Raw match data */
+ void *preparsed; /* For ->match_preparse() to stash stuff */
+ unsigned lookup_type; /* Type of lookup for this search. */
+#define KEYRING_SEARCH_LOOKUP_DIRECT 0x0000 /* Direct lookup by description. */
+#define KEYRING_SEARCH_LOOKUP_ITERATE 0x0001 /* Iterative search. */
+};
+
+/*
* kernel managed key type definition
*/
struct key_type {
@@ -67,8 +83,6 @@ struct key_type {
/* Default key search algorithm. */
unsigned def_lookup_type;
-#define KEYRING_SEARCH_LOOKUP_DIRECT 0x0000 /* Direct lookup by description. */
-#define KEYRING_SEARCH_LOOKUP_ITERATE 0x0001 /* Iterative search. */
/* vet a description */
int (*vet_description)(const char *description);
@@ -96,8 +110,19 @@ struct key_type {
*/
int (*update)(struct key *key, struct key_preparsed_payload *prep);
+ /* Preparse the data supplied to ->match() (optional). The
+ * data to be preparsed can be found in match_data->raw_data.
+ * The lookup type can also be set by this function.
+ */
+ int (*match_preparse)(struct key_match_data *match_data);
+
/* match a key against a description */
- int (*match)(const struct key *key, const void *desc);
+ int (*match)(const struct key *key,
+ const struct key_match_data *match_data);
+
+ /* Free preparsed match data (optional). This should be supplied it
+ * ->match_preparse() is supplied. */
+ void (*match_free)(struct key_match_data *match_data);
/* clear some of the data from a key on revokation (optional)
* - the key's semaphore will be write-locked by the caller

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