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-rw-r--r--fs/dlm/lowcomms.c45
1 files changed, 25 insertions, 20 deletions
diff --git a/fs/dlm/lowcomms.c b/fs/dlm/lowcomms.c
index ed707d4323f4..32b534f4a9b6 100644
--- a/fs/dlm/lowcomms.c
+++ b/fs/dlm/lowcomms.c
@@ -122,10 +122,6 @@ struct connection {
struct connection *othercon;
struct work_struct rwork; /* Receive workqueue */
struct work_struct swork; /* Send workqueue */
- void (*orig_error_report)(struct sock *);
- void (*orig_data_ready)(struct sock *);
- void (*orig_state_change)(struct sock *);
- void (*orig_write_space)(struct sock *);
};
#define sock2con(x) ((struct connection *)(x)->sk_user_data)
@@ -148,6 +144,13 @@ struct dlm_node_addr {
struct sockaddr_storage *addr[DLM_MAX_ADDR_COUNT];
};
+static struct listen_sock_callbacks {
+ void (*sk_error_report)(struct sock *);
+ void (*sk_data_ready)(struct sock *);
+ void (*sk_state_change)(struct sock *);
+ void (*sk_write_space)(struct sock *);
+} listen_sock;
+
static LIST_HEAD(dlm_node_addrs);
static DEFINE_SPINLOCK(dlm_node_addrs_spin);
@@ -477,7 +480,7 @@ static void lowcomms_error_report(struct sock *sk)
if (con == NULL)
goto out;
- orig_report = con->orig_error_report;
+ orig_report = listen_sock.sk_error_report;
if (con->sock == NULL ||
kernel_getpeername(con->sock, (struct sockaddr *)&saddr, &buflen)) {
printk_ratelimited(KERN_ERR "dlm: node %d: socket error "
@@ -514,22 +517,26 @@ out:
}
/* Note: sk_callback_lock must be locked before calling this function. */
-static void save_callbacks(struct connection *con, struct sock *sk)
+static void save_listen_callbacks(struct socket *sock)
{
- con->orig_data_ready = sk->sk_data_ready;
- con->orig_state_change = sk->sk_state_change;
- con->orig_write_space = sk->sk_write_space;
- con->orig_error_report = sk->sk_error_report;
+ struct sock *sk = sock->sk;
+
+ listen_sock.sk_data_ready = sk->sk_data_ready;
+ listen_sock.sk_state_change = sk->sk_state_change;
+ listen_sock.sk_write_space = sk->sk_write_space;
+ listen_sock.sk_error_report = sk->sk_error_report;
}
-static void restore_callbacks(struct connection *con, struct sock *sk)
+static void restore_callbacks(struct socket *sock)
{
+ struct sock *sk = sock->sk;
+
write_lock_bh(&sk->sk_callback_lock);
sk->sk_user_data = NULL;
- sk->sk_data_ready = con->orig_data_ready;
- sk->sk_state_change = con->orig_state_change;
- sk->sk_write_space = con->orig_write_space;
- sk->sk_error_report = con->orig_error_report;
+ sk->sk_data_ready = listen_sock.sk_data_ready;
+ sk->sk_state_change = listen_sock.sk_state_change;
+ sk->sk_write_space = listen_sock.sk_write_space;
+ sk->sk_error_report = listen_sock.sk_error_report;
write_unlock_bh(&sk->sk_callback_lock);
}
@@ -542,8 +549,6 @@ static void add_sock(struct socket *sock, struct connection *con, bool save_cb)
con->sock = sock;
sk->sk_user_data = con;
- if (save_cb)
- save_callbacks(con, sk);
/* Install a data_ready callback */
sk->sk_data_ready = lowcomms_data_ready;
sk->sk_write_space = lowcomms_write_space;
@@ -583,8 +588,7 @@ static void close_connection(struct connection *con, bool and_other,
mutex_lock(&con->sock_mutex);
if (con->sock) {
- if (!test_bit(CF_IS_OTHERCON, &con->flags))
- restore_callbacks(con, con->sock->sk);
+ restore_callbacks(con->sock);
sock_release(con->sock);
con->sock = NULL;
}
@@ -1226,7 +1230,7 @@ static struct socket *tcp_create_listen_sock(struct connection *con,
log_print("Failed to set SO_REUSEADDR on socket: %d", result);
}
sock->sk->sk_user_data = con;
-
+ save_listen_callbacks(sock);
con->rx_action = tcp_accept_from_sock;
con->connect_action = tcp_connect_to_sock;
@@ -1310,6 +1314,7 @@ static int sctp_listen_for_all(void)
write_lock_bh(&sock->sk->sk_callback_lock);
/* Init con struct */
sock->sk->sk_user_data = con;
+ save_listen_callbacks(sock);
con->sock = sock;
con->sock->sk->sk_data_ready = lowcomms_data_ready;
con->rx_action = sctp_accept_from_sock;