From 9e469e30d712b54cd3ff4a82d4dd5510522b8f16 Mon Sep 17 00:00:00 2001 From: "Eric W. Biederman" Date: Sat, 2 Feb 2013 01:57:30 -0800 Subject: [PATCH] sunrpc: Hash uids by first computing their value in the initial userns In svcauth_unix introduce a helper unix_gid_hash as otherwise the expresion to generate the hash value is just too long. Cc: "J. Bruce Fields" Cc: Trond Myklebust Signed-off-by: "Eric W. Biederman" --- net/sunrpc/auth.c | 2 +- net/sunrpc/svcauth_unix.c | 9 +++++++-- 2 files changed, 8 insertions(+), 3 deletions(-) diff --git a/net/sunrpc/auth.c b/net/sunrpc/auth.c index 4cd0ecfe9837..392adc41e2e5 100644 --- a/net/sunrpc/auth.c +++ b/net/sunrpc/auth.c @@ -412,7 +412,7 @@ rpcauth_lookup_credcache(struct rpc_auth *auth, struct auth_cred * acred, *entry, *new; unsigned int nr; - nr = hash_long(acred->uid, cache->hashbits); + nr = hash_long(from_kuid(&init_user_ns, acred->uid), cache->hashbits); rcu_read_lock(); hlist_for_each_entry_rcu(entry, pos, &cache->hashtable[nr], cr_hash) { diff --git a/net/sunrpc/svcauth_unix.c b/net/sunrpc/svcauth_unix.c index 92166b57ec7a..faf17195a9fd 100644 --- a/net/sunrpc/svcauth_unix.c +++ b/net/sunrpc/svcauth_unix.c @@ -419,6 +419,11 @@ struct unix_gid { struct group_info *gi; }; +static int unix_gid_hash(kuid_t uid) +{ + return hash_long(from_kuid(&init_user_ns, uid), GID_HASHBITS); +} + static void unix_gid_put(struct kref *kref) { struct cache_head *item = container_of(kref, struct cache_head, ref); @@ -530,7 +535,7 @@ static int unix_gid_parse(struct cache_detail *cd, ug.h.expiry_time = expiry; ch = sunrpc_cache_update(cd, &ug.h, &ugp->h, - hash_long(uid, GID_HASHBITS)); + unix_gid_hash(uid)); if (!ch) err = -ENOMEM; else { @@ -621,7 +626,7 @@ static struct unix_gid *unix_gid_lookup(struct cache_detail *cd, kuid_t uid) struct cache_head *ch; ug.uid = uid; - ch = sunrpc_cache_lookup(cd, &ug.h, hash_long(uid, GID_HASHBITS)); + ch = sunrpc_cache_lookup(cd, &ug.h, unix_gid_hash(uid)); if (ch) return container_of(ch, struct unix_gid, h); else -- 2.39.5