Commit fd5d2f78 authored by Trond Myklebust's avatar Trond Myklebust Committed by J. Bruce Fields

SUNRPC: Make server side AUTH_UNIX use lockless lookups

Convert structs ip_map and unix_gid to use RCU protected lookups.
Signed-off-by: default avatarTrond Myklebust <trond.myklebust@hammerspace.com>
Signed-off-by: default avatarJ. Bruce Fields <bfields@redhat.com>
parent ae74136b
...@@ -97,6 +97,7 @@ struct ip_map { ...@@ -97,6 +97,7 @@ struct ip_map {
char m_class[8]; /* e.g. "nfsd" */ char m_class[8]; /* e.g. "nfsd" */
struct in6_addr m_addr; struct in6_addr m_addr;
struct unix_domain *m_client; struct unix_domain *m_client;
struct rcu_head m_rcu;
}; };
static void ip_map_put(struct kref *kref) static void ip_map_put(struct kref *kref)
...@@ -107,7 +108,7 @@ static void ip_map_put(struct kref *kref) ...@@ -107,7 +108,7 @@ static void ip_map_put(struct kref *kref)
if (test_bit(CACHE_VALID, &item->flags) && if (test_bit(CACHE_VALID, &item->flags) &&
!test_bit(CACHE_NEGATIVE, &item->flags)) !test_bit(CACHE_NEGATIVE, &item->flags))
auth_domain_put(&im->m_client->h); auth_domain_put(&im->m_client->h);
kfree(im); kfree_rcu(im, m_rcu);
} }
static inline int hash_ip6(const struct in6_addr *ip) static inline int hash_ip6(const struct in6_addr *ip)
...@@ -286,9 +287,9 @@ static struct ip_map *__ip_map_lookup(struct cache_detail *cd, char *class, ...@@ -286,9 +287,9 @@ static struct ip_map *__ip_map_lookup(struct cache_detail *cd, char *class,
strcpy(ip.m_class, class); strcpy(ip.m_class, class);
ip.m_addr = *addr; ip.m_addr = *addr;
ch = sunrpc_cache_lookup(cd, &ip.h, ch = sunrpc_cache_lookup_rcu(cd, &ip.h,
hash_str(class, IP_HASHBITS) ^ hash_str(class, IP_HASHBITS) ^
hash_ip6(addr)); hash_ip6(addr));
if (ch) if (ch)
return container_of(ch, struct ip_map, h); return container_of(ch, struct ip_map, h);
...@@ -418,6 +419,7 @@ struct unix_gid { ...@@ -418,6 +419,7 @@ struct unix_gid {
struct cache_head h; struct cache_head h;
kuid_t uid; kuid_t uid;
struct group_info *gi; struct group_info *gi;
struct rcu_head rcu;
}; };
static int unix_gid_hash(kuid_t uid) static int unix_gid_hash(kuid_t uid)
...@@ -432,7 +434,7 @@ static void unix_gid_put(struct kref *kref) ...@@ -432,7 +434,7 @@ static void unix_gid_put(struct kref *kref)
if (test_bit(CACHE_VALID, &item->flags) && if (test_bit(CACHE_VALID, &item->flags) &&
!test_bit(CACHE_NEGATIVE, &item->flags)) !test_bit(CACHE_NEGATIVE, &item->flags))
put_group_info(ug->gi); put_group_info(ug->gi);
kfree(ug); kfree_rcu(ug, rcu);
} }
static int unix_gid_match(struct cache_head *corig, struct cache_head *cnew) static int unix_gid_match(struct cache_head *corig, struct cache_head *cnew)
...@@ -625,7 +627,7 @@ static struct unix_gid *unix_gid_lookup(struct cache_detail *cd, kuid_t uid) ...@@ -625,7 +627,7 @@ static struct unix_gid *unix_gid_lookup(struct cache_detail *cd, kuid_t uid)
struct cache_head *ch; struct cache_head *ch;
ug.uid = uid; ug.uid = uid;
ch = sunrpc_cache_lookup(cd, &ug.h, unix_gid_hash(uid)); ch = sunrpc_cache_lookup_rcu(cd, &ug.h, unix_gid_hash(uid));
if (ch) if (ch)
return container_of(ch, struct unix_gid, h); return container_of(ch, struct unix_gid, h);
else else
......
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