diff options
Diffstat (limited to 'net/sunrpc/svcauth_unix.c')
-rw-r--r-- | net/sunrpc/svcauth_unix.c | 52 |
1 files changed, 45 insertions, 7 deletions
diff --git a/net/sunrpc/svcauth_unix.c b/net/sunrpc/svcauth_unix.c index 1020d54b01d074..e1bd933629fe59 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 @@ -348,12 +349,9 @@ int auth_unix_forget_old(struct auth_domain *dom) struct auth_domain *auth_unix_lookup(struct in_addr addr) { - struct ip_map key, *ipm; + struct ip_map *ipm; struct auth_domain *rv; - strcpy(key.m_class, "nfsd"); - key.m_addr = addr; - ipm = ip_map_lookup("nfsd", addr); if (!ipm) @@ -378,6 +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) { @@ -387,8 +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; @@ -403,7 +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; |