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keys: Move the RCU locks outwards from the keyring search functions

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Move the RCU locks outwards from the keyring search functions so that it
will become possible to provide an RCU-capable partial request_key()
function in a later commit.

Signed-off-by: David Howells <dhowells@redhat.com>
This commit is contained in:
David Howells
2019-06-19 16:10:15 +01:00
parent a09003b5d7
commit e59428f721
8 changed files with 77 additions and 61 deletions
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8
security/keys/request_key.c
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@@ -385,7 +385,9 @@ static int construct_alloc_key(struct keyring_search_context *ctx,
* waited for locks */
mutex_lock(&key_construction_mutex);
key_ref = search_process_keyrings(ctx);
rcu_read_lock();
key_ref = search_process_keyrings_rcu(ctx);
rcu_read_unlock();
if (!IS_ERR(key_ref))
goto key_already_present;
@@ -561,7 +563,9 @@ struct key *request_key_and_link(struct key_type *type,
}
/* search all the process keyrings for a key */
key_ref = search_process_keyrings(&ctx);
rcu_read_lock();
key_ref = search_process_keyrings_rcu(&ctx);
rcu_read_unlock();
if (!IS_ERR(key_ref)) {
if (dest_keyring) {