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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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2
Documentation/security/keys/request-key.rst
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@ -148,7 +148,7 @@ The Search Algorithm
A search of any particular keyring proceeds in the following fashion:
1) When the key management code searches for a key (keyring_search_aux) it
1) When the key management code searches for a key (keyring_search_rcu) it
firstly calls key_permission(SEARCH) on the keyring it's starting with,
if this denies permission, it doesn't search further.