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authorTrond Myklebust <trondmy@gmail.com>2018-10-01 17:41:44 +0300
committerJ. Bruce Fields <bfields@redhat.com>2018-10-03 18:32:59 +0300
commit608a0ab2f54ab0e301ad76a41aad979ea0d02670 (patch)
tree26382fa9fd57a2f549fb991c067c72257a2b2b61 /net/sunrpc/svcauth_unix.c
parent30382d6ce593f863292cd7c026a79077c4e7280f (diff)
downloadlinux-608a0ab2f54ab0e301ad76a41aad979ea0d02670.tar.xz
SUNRPC: Add lockless lookup of the server's auth domain
Avoid taking the global auth_domain_lock in most lookups of the auth domain by adding an RCU protected lookup. Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com> Signed-off-by: J. Bruce Fields <bfields@redhat.com>
Diffstat (limited to 'net/sunrpc/svcauth_unix.c')
-rw-r--r--net/sunrpc/svcauth_unix.c10
1 files changed, 8 insertions, 2 deletions
diff --git a/net/sunrpc/svcauth_unix.c b/net/sunrpc/svcauth_unix.c
index af7f28fb8102..84cf39021a03 100644
--- a/net/sunrpc/svcauth_unix.c
+++ b/net/sunrpc/svcauth_unix.c
@@ -37,20 +37,26 @@ struct unix_domain {
extern struct auth_ops svcauth_null;
extern struct auth_ops svcauth_unix;
-static void svcauth_unix_domain_release(struct auth_domain *dom)
+static void svcauth_unix_domain_release_rcu(struct rcu_head *head)
{
+ struct auth_domain *dom = container_of(head, struct auth_domain, rcu_head);
struct unix_domain *ud = container_of(dom, struct unix_domain, h);
kfree(dom->name);
kfree(ud);
}
+static void svcauth_unix_domain_release(struct auth_domain *dom)
+{
+ call_rcu(&dom->rcu_head, svcauth_unix_domain_release_rcu);
+}
+
struct auth_domain *unix_domain_find(char *name)
{
struct auth_domain *rv;
struct unix_domain *new = NULL;
- rv = auth_domain_lookup(name, NULL);
+ rv = auth_domain_find(name);
while(1) {
if (rv) {
if (new && rv != &new->h)