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svc: Move the authinfo cache to svc_xprt. 

Move the authinfo cache to svc_xprt. This allows both the TCP and RDMA
transports to share this logic. A flag bit is used to determine if
auth information is to be cached or not. Previously, this code looked
at the transport protocol.

I've also changed the spin_lock/unlock logic so that a lock is not taken for
transports that are not caching auth info.

Signed-off-by: Tom Tucker <tom@opengridcomputing.com>
Acked-by: Neil Brown <neilb@suse.de>
Reviewed-by: Chuck Lever <chuck.lever@oracle.com>
Reviewed-by: Greg Banks <gnb@sgi.com>
Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
This commit is contained in:
Tom Tucker 2007-12-30 21:08:08 -06:00 committed by J. Bruce Fields
parent 4bc6c497b2
commit def13d7401
5 changed files with 49 additions and 40 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
include/linux/sunrpc/svc_xprt.h
View File

@ -50,11 +50,15 @@ struct svc_xprt {
#define XPT_OLD 9 /* used for xprt aging mark+sweep */
#define XPT_DETACHED 10 /* detached from tempsocks list */
#define XPT_LISTENER 11 /* listening endpoint */
#define XPT_CACHE_AUTH 12 /* cache auth info */
struct svc_pool *xpt_pool; /* current pool iff queued */
struct svc_serv *xpt_server; /* service for transport */
atomic_t xpt_reserved; /* space on outq that is rsvd */
struct mutex xpt_mutex; /* to serialize sending data */
spinlock_t xpt_lock; /* protects sk_deferred
* and xpt_auth_cache */
void *xpt_auth_cache;/* auth cache */
};
int svc_reg_xprt_class(struct svc_xprt_class *);

5
include/linux/sunrpc/svcsock.h
View File

@ -20,8 +20,6 @@ struct svc_sock {
struct socket * sk_sock; /* berkeley socket layer */
struct sock * sk_sk; /* INET layer */
spinlock_t sk_lock; /* protects sk_deferred and
* sk_info_authunix */
struct list_head sk_deferred; /* deferred requests that need to
* be revisted */
@ -34,9 +32,6 @@ struct svc_sock {
int sk_reclen; /* length of record */
int sk_tcplen; /* current read length */
/* cache of various info for TCP sockets */
void *sk_info_authunix;
struct sockaddr_storage sk_local; /* local address */
struct sockaddr_storage sk_remote; /* remote peer's address */
int sk_remotelen; /* length of address */

4
net/sunrpc/svc_xprt.c
View File

@ -75,6 +75,9 @@ static void svc_xprt_free(struct kref *kref)
struct svc_xprt *xprt =
container_of(kref, struct svc_xprt, xpt_ref);
struct module *owner = xprt->xpt_class->xcl_owner;
if (test_bit(XPT_CACHE_AUTH, &xprt->xpt_flags)
&& xprt->xpt_auth_cache != NULL)
svcauth_unix_info_release(xprt->xpt_auth_cache);
xprt->xpt_ops->xpo_free(xprt);
module_put(owner);
}
@ -100,6 +103,7 @@ void svc_xprt_init(struct svc_xprt_class *xcl, struct svc_xprt *xprt,
INIT_LIST_HEAD(&xprt->xpt_list);
INIT_LIST_HEAD(&xprt->xpt_ready);
mutex_init(&xprt->xpt_mutex);
spin_lock_init(&xprt->xpt_lock);
}
EXPORT_SYMBOL_GPL(svc_xprt_init);

54
net/sunrpc/svcauth_unix.c
View File

@ -384,41 +384,45 @@ void svcauth_unix_purge(void)
static inline struct ip_map *
ip_map_cached_get(struct svc_rqst *rqstp)
{
struct ip_map *ipm;
struct svc_sock *svsk = rqstp->rq_sock;
spin_lock(&svsk->sk_lock);
ipm = svsk->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.
*/
svsk->sk_info_authunix = NULL;
spin_unlock(&svsk->sk_lock);
cache_put(&ipm->h, &ip_map_cache);
return NULL;
struct ip_map *ipm = NULL;
struct svc_xprt *xprt = rqstp->rq_xprt;
if (test_bit(XPT_CACHE_AUTH, &xprt->xpt_flags)) {
spin_lock(&xprt->xpt_lock);
ipm = xprt->xpt_auth_cache;
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.
*/
xprt->xpt_auth_cache = NULL;
spin_unlock(&xprt->xpt_lock);
cache_put(&ipm->h, &ip_map_cache);
return NULL;
}
cache_get(&ipm->h);
}
cache_get(&ipm->h);
spin_unlock(&xprt->xpt_lock);
}
spin_unlock(&svsk->sk_lock);
return ipm;
}
static inline void
ip_map_cached_put(struct svc_rqst *rqstp, struct ip_map *ipm)
{
struct svc_sock *svsk = rqstp->rq_sock;
struct svc_xprt *xprt = rqstp->rq_xprt;
spin_lock(&svsk->sk_lock);
if (svsk->sk_sock->type == SOCK_STREAM &&
svsk->sk_info_authunix == NULL) {
/* newly cached, keep the reference */
svsk->sk_info_authunix = ipm;
ipm = NULL;
if (test_bit(XPT_CACHE_AUTH, &xprt->xpt_flags)) {
spin_lock(&xprt->xpt_lock);
if (xprt->xpt_auth_cache == NULL) {
/* newly cached, keep the reference */
xprt->xpt_auth_cache = ipm;
ipm = NULL;
}
spin_unlock(&xprt->xpt_lock);
}
spin_unlock(&svsk->sk_lock);
if (ipm)
cache_put(&ipm->h, &ip_map_cache);
}

22
net/sunrpc/svcsock.c
View File

@ -113,12 +113,16 @@ static inline void svc_reclassify_socket(struct socket *sock)
switch (sk->sk_family) {
case AF_INET:
sock_lock_init_class_and_name(sk, "slock-AF_INET-NFSD",
&svc_slock_key[0], "sk_lock-AF_INET-NFSD", &svc_key[0]);
&svc_slock_key[0],
"sk_xprt.xpt_lock-AF_INET-NFSD",
&svc_key[0]);
break;
case AF_INET6:
sock_lock_init_class_and_name(sk, "slock-AF_INET6-NFSD",
&svc_slock_key[1], "sk_lock-AF_INET6-NFSD", &svc_key[1]);
&svc_slock_key[1],
"sk_xprt.xpt_lock-AF_INET6-NFSD",
&svc_key[1]);
break;
default:
@ -930,6 +934,7 @@ static void svc_udp_init(struct svc_sock *svsk, struct svc_serv *serv)
mm_segment_t oldfs;
svc_xprt_init(&svc_udp_class, &svsk->sk_xprt, serv);
clear_bit(XPT_CACHE_AUTH, &svsk->sk_xprt.xpt_flags);
svsk->sk_sk->sk_data_ready = svc_udp_data_ready;
svsk->sk_sk->sk_write_space = svc_write_space;
@ -1385,7 +1390,7 @@ static void svc_tcp_init(struct svc_sock *svsk, struct svc_serv *serv)
struct tcp_sock *tp = tcp_sk(sk);
svc_xprt_init(&svc_tcp_class, &svsk->sk_xprt, serv);
set_bit(XPT_CACHE_AUTH, &svsk->sk_xprt.xpt_flags);
if (sk->sk_state == TCP_LISTEN) {
dprintk("setting up TCP socket for listening\n");
set_bit(XPT_LISTENER, &svsk->sk_xprt.xpt_flags);
@ -1753,7 +1758,6 @@ static struct svc_sock *svc_setup_socket(struct svc_serv *serv,
svsk->sk_ostate = inet->sk_state_change;
svsk->sk_odata = inet->sk_data_ready;
svsk->sk_owspace = inet->sk_write_space;
spin_lock_init(&svsk->sk_lock);
INIT_LIST_HEAD(&svsk->sk_deferred);
/* Initialize the socket */
@ -1898,8 +1902,6 @@ static void svc_sock_free(struct svc_xprt *xprt)
struct svc_sock *svsk = container_of(xprt, struct svc_sock, sk_xprt);
dprintk("svc: svc_sock_free(%p)\n", svsk);
if (svsk->sk_info_authunix != NULL)
svcauth_unix_info_release(svsk->sk_info_authunix);
if (svsk->sk_sock->file)
sockfd_put(svsk->sk_sock);
else
@ -1984,9 +1986,9 @@ static void svc_revisit(struct cache_deferred_req *dreq, int too_many)
dprintk("revisit queued\n");
svsk = dr->svsk;
dr->svsk = NULL;
spin_lock(&svsk->sk_lock);
spin_lock(&svsk->sk_xprt.xpt_lock);
list_add(&dr->handle.recent, &svsk->sk_deferred);
spin_unlock(&svsk->sk_lock);
spin_unlock(&svsk->sk_xprt.xpt_lock);
set_bit(XPT_DEFERRED, &svsk->sk_xprt.xpt_flags);
svc_xprt_enqueue(&svsk->sk_xprt);
svc_xprt_put(&svsk->sk_xprt);
@ -2052,7 +2054,7 @@ static struct svc_deferred_req *svc_deferred_dequeue(struct svc_sock *svsk)
if (!test_bit(XPT_DEFERRED, &svsk->sk_xprt.xpt_flags))
return NULL;
spin_lock(&svsk->sk_lock);
spin_lock(&svsk->sk_xprt.xpt_lock);
clear_bit(XPT_DEFERRED, &svsk->sk_xprt.xpt_flags);
if (!list_empty(&svsk->sk_deferred)) {
dr = list_entry(svsk->sk_deferred.next,
@ -2061,6 +2063,6 @@ static struct svc_deferred_req *svc_deferred_dequeue(struct svc_sock *svsk)
list_del_init(&dr->handle.recent);
set_bit(XPT_DEFERRED, &svsk->sk_xprt.xpt_flags);
}
spin_unlock(&svsk->sk_lock);
spin_unlock(&svsk->sk_xprt.xpt_lock);
return dr;
}