[3/5] sunrpc: add auth_unix hash_cred() function
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Message ID 1475163881-12438-4-git-send-email-sorenson@redhat.com
State New
Headers show

Commit Message

Frank Sorenson Sept. 29, 2016, 3:44 p.m. UTC
Add a hash_cred() function for auth_unix, using both the
uid and gid from the auth_cred.

Signed-off-by: Frank Sorenson <sorenson@redhat.com>
---
 net/sunrpc/auth_unix.c | 9 +++++++++
 1 file changed, 9 insertions(+)

Patch
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diff --git a/net/sunrpc/auth_unix.c b/net/sunrpc/auth_unix.c
index a99278c..4c0c572 100644
--- a/net/sunrpc/auth_unix.c
+++ b/net/sunrpc/auth_unix.c
@@ -46,6 +46,14 @@  unx_destroy(struct rpc_auth *auth)
 	rpcauth_clear_credcache(auth->au_credcache);
 }
 
+static int
+unx_hash_cred(struct auth_cred *acred, unsigned int hashbits)
+{
+	return hash_64(from_kgid(&init_user_ns, acred->gid) |
+		((u64)from_kuid(&init_user_ns, acred->uid) <<
+			(sizeof(gid_t) * 8)), hashbits);
+}
+
 /*
  * Lookup AUTH_UNIX creds for current process
  */
@@ -220,6 +228,7 @@  const struct rpc_authops authunix_ops = {
 	.au_name	= "UNIX",
 	.create		= unx_create,
 	.destroy	= unx_destroy,
+	.hash_cred	= unx_hash_cred,
 	.lookup_cred	= unx_lookup_cred,
 	.crcreate	= unx_create_cred,
 };