From 8d9067bda99c68e1a17d93e78cf3a5a3f67e0c35 Mon Sep 17 00:00:00 2001 From: David Howells Date: Fri, 6 Jan 2006 00:11:24 -0800 Subject: [PATCH] Keys: Remove key duplication Remove the key duplication stuff since there's nothing that uses it, no way to get at it and it's awkward to deal with for LSM purposes. Signed-off-by: David Howells Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- security/keys/keyring.c | 64 ------------------------------------------------- 1 file changed, 64 deletions(-) (limited to 'security/keys/keyring.c') diff --git a/security/keys/keyring.c b/security/keys/keyring.c index 4e9fa8be44b8..0acecbd4fa37 100644 --- a/security/keys/keyring.c +++ b/security/keys/keyring.c @@ -48,7 +48,6 @@ static inline unsigned keyring_hash(const char *desc) */ static int keyring_instantiate(struct key *keyring, const void *data, size_t datalen); -static int keyring_duplicate(struct key *keyring, const struct key *source); static int keyring_match(const struct key *keyring, const void *criterion); static void keyring_destroy(struct key *keyring); static void keyring_describe(const struct key *keyring, struct seq_file *m); @@ -59,7 +58,6 @@ struct key_type key_type_keyring = { .name = "keyring", .def_datalen = sizeof(struct keyring_list), .instantiate = keyring_instantiate, - .duplicate = keyring_duplicate, .match = keyring_match, .destroy = keyring_destroy, .describe = keyring_describe, @@ -118,68 +116,6 @@ static int keyring_instantiate(struct key *keyring, } /* end keyring_instantiate() */ -/*****************************************************************************/ -/* - * duplicate the list of subscribed keys from a source keyring into this one - */ -static int keyring_duplicate(struct key *keyring, const struct key *source) -{ - struct keyring_list *sklist, *klist; - unsigned max; - size_t size; - int loop, ret; - - const unsigned limit = - (PAGE_SIZE - sizeof(*klist)) / sizeof(struct key *); - - ret = 0; - - /* find out how many keys are currently linked */ - rcu_read_lock(); - sklist = rcu_dereference(source->payload.subscriptions); - max = 0; - if (sklist) - max = sklist->nkeys; - rcu_read_unlock(); - - /* allocate a new payload and stuff load with key links */ - if (max > 0) { - BUG_ON(max > limit); - - max = (max + 3) & ~3; - if (max > limit) - max = limit; - - ret = -ENOMEM; - size = sizeof(*klist) + sizeof(struct key *) * max; - klist = kmalloc(size, GFP_KERNEL); - if (!klist) - goto error; - - /* set links */ - rcu_read_lock(); - sklist = rcu_dereference(source->payload.subscriptions); - - klist->maxkeys = max; - klist->nkeys = sklist->nkeys; - memcpy(klist->keys, - sklist->keys, - sklist->nkeys * sizeof(struct key *)); - - for (loop = klist->nkeys - 1; loop >= 0; loop--) - atomic_inc(&klist->keys[loop]->usage); - - rcu_read_unlock(); - - rcu_assign_pointer(keyring->payload.subscriptions, klist); - ret = 0; - } - - error: - return ret; - -} /* end keyring_duplicate() */ - /*****************************************************************************/ /* * match keyrings on their name -- cgit v1.2.3