diff options
Diffstat (limited to 'net')
| -rw-r--r-- | net/sunrpc/svcauth_unix.c | 47 | ||||
| -rw-r--r-- | net/sunrpc/svcsock.c | 2 |
2 files changed, 46 insertions, 3 deletions
diff --git a/net/sunrpc/svcauth_unix.c b/net/sunrpc/svcauth_unix.c index 40d41a2831d..e1bd933629f 100644 --- a/net/sunrpc/svcauth_unix.c +++ b/net/sunrpc/svcauth_unix.c @@ -9,6 +9,7 @@ #include <linux/seq_file.h> #include <linux/hash.h> #include <linux/string.h> +#include <net/sock.h> #define RPCDBG_FACILITY RPCDBG_AUTH @@ -375,6 +376,44 @@ void svcauth_unix_purge(void) cache_purge(&ip_map_cache); } +static inline struct ip_map * +ip_map_cached_get(struct svc_rqst *rqstp) +{ + struct ip_map *ipm = rqstp->rq_sock->sk_info_authunix; + if (ipm != NULL) { + if (!cache_valid(&ipm->h)) { + /* + * The entry has been invalidated since it was + * remembered, e.g. by a second mount from the + * same IP address. + */ + rqstp->rq_sock->sk_info_authunix = NULL; + cache_put(&ipm->h, &ip_map_cache); + return NULL; + } + cache_get(&ipm->h); + } + return ipm; +} + +static inline void +ip_map_cached_put(struct svc_rqst *rqstp, struct ip_map *ipm) +{ + struct svc_sock *svsk = rqstp->rq_sock; + + if (svsk->sk_sock->type == SOCK_STREAM && svsk->sk_info_authunix == NULL) + svsk->sk_info_authunix = ipm; /* newly cached, keep the reference */ + else + cache_put(&ipm->h, &ip_map_cache); +} + +void +svcauth_unix_info_release(void *info) +{ + struct ip_map *ipm = info; + cache_put(&ipm->h, &ip_map_cache); +} + static int svcauth_unix_set_client(struct svc_rqst *rqstp) { @@ -384,8 +423,10 @@ svcauth_unix_set_client(struct svc_rqst *rqstp) if (rqstp->rq_proc == 0) return SVC_OK; - ipm = ip_map_lookup(rqstp->rq_server->sv_program->pg_class, - rqstp->rq_addr.sin_addr); + ipm = ip_map_cached_get(rqstp); + if (ipm == NULL) + ipm = ip_map_lookup(rqstp->rq_server->sv_program->pg_class, + rqstp->rq_addr.sin_addr); if (ipm == NULL) return SVC_DENIED; @@ -400,7 +441,7 @@ svcauth_unix_set_client(struct svc_rqst *rqstp) case 0: rqstp->rq_client = &ipm->m_client->h; kref_get(&rqstp->rq_client->ref); - cache_put(&ipm->h, &ip_map_cache); + ip_map_cached_put(rqstp, ipm); break; } return SVC_OK; diff --git a/net/sunrpc/svcsock.c b/net/sunrpc/svcsock.c index 1d512337ccd..b39e7e2b648 100644 --- a/net/sunrpc/svcsock.c +++ b/net/sunrpc/svcsock.c @@ -1610,6 +1610,8 @@ svc_delete_socket(struct svc_sock *svsk) sockfd_put(svsk->sk_sock); else sock_release(svsk->sk_sock); + if (svsk->sk_info_authunix != NULL) + svcauth_unix_info_release(svsk->sk_info_authunix); kfree(svsk); } else { spin_unlock_bh(&serv->sv_lock); |