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Subject[PATCH 1/7] connector: Keep the skb in cn_callback_data
Date
Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com>
Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
Acked-by: Evgeniy Polyakov <zbr@ioremap.net>
(cherry picked from commit 5491c43845dae6c68cb4edbcf2e2dde9a32a863d)
---
drivers/connector/cn_queue.c | 3 ++-
drivers/connector/connector.c | 11 +++++------
include/linux/connector.h | 6 +++---
3 files changed, 10 insertions(+), 10 deletions(-)
diff --git a/drivers/connector/cn_queue.c b/drivers/connector/cn_queue.c
index 408c2af..327dfde 100644
--- a/drivers/connector/cn_queue.c
+++ b/drivers/connector/cn_queue.c
@@ -78,8 +78,9 @@ void cn_queue_wrapper(struct work_struct *work)
struct cn_callback_entry *cbq =
container_of(work, struct cn_callback_entry, work);
struct cn_callback_data *d = &cbq->data;
+ struct cn_msg *msg = NLMSG_DATA(nlmsg_hdr(d->skb));

- d->callback(d->callback_priv);
+ d->callback(msg);

d->destruct_data(d->ddata);
d->ddata = NULL;
diff --git a/drivers/connector/connector.c b/drivers/connector/connector.c
index 08b2500..9bb14ac 100644
--- a/drivers/connector/connector.c
+++ b/drivers/connector/connector.c
@@ -129,10 +129,11 @@ EXPORT_SYMBOL_GPL(cn_netlink_send);
/*
* Callback helper - queues work and setup destructor for given data.
*/
-static int cn_call_callback(struct cn_msg *msg, void (*destruct_data)(void *), void *data)
+static int cn_call_callback(struct sk_buff *skb, void (*destruct_data)(void *), void *data)
{
struct cn_callback_entry *__cbq, *__new_cbq;
struct cn_dev *dev = &cdev;
+ struct cn_msg *msg = NLMSG_DATA(nlmsg_hdr(skb));
int err = -ENODEV;

spin_lock_bh(&dev->cbdev->queue_lock);
@@ -140,7 +141,7 @@ static int cn_call_callback(struct cn_msg *msg, void (*destruct_data)(void *), v
if (cn_cb_equal(&__cbq->id.id, &msg->id)) {
if (likely(!work_pending(&__cbq->work) &&
__cbq->data.ddata == NULL)) {
- __cbq->data.callback_priv = msg;
+ __cbq->data.skb = skb;

__cbq->data.ddata = data;
__cbq->data.destruct_data = destruct_data;
@@ -156,7 +157,7 @@ static int cn_call_callback(struct cn_msg *msg, void (*destruct_data)(void *), v
__new_cbq = kzalloc(sizeof(struct cn_callback_entry), GFP_ATOMIC);
if (__new_cbq) {
d = &__new_cbq->data;
- d->callback_priv = msg;
+ d->skb = skb;
d->callback = __cbq->data.callback;
d->ddata = data;
d->destruct_data = destruct_data;
@@ -191,7 +192,6 @@ static int cn_call_callback(struct cn_msg *msg, void (*destruct_data)(void *), v
*/
static void cn_rx_skb(struct sk_buff *__skb)
{
- struct cn_msg *msg;
struct nlmsghdr *nlh;
int err;
struct sk_buff *skb;
@@ -208,8 +208,7 @@ static void cn_rx_skb(struct sk_buff *__skb)
return;
}

- msg = NLMSG_DATA(nlh);
- err = cn_call_callback(msg, (void (*)(void *))kfree_skb, skb);
+ err = cn_call_callback(skb, (void (*)(void *))kfree_skb, skb);
if (err < 0)
kfree_skb(skb);
}
diff --git a/include/linux/connector.h b/include/linux/connector.h
index b68d278..51b9ebd 100644
--- a/include/linux/connector.h
+++ b/include/linux/connector.h
@@ -134,9 +134,9 @@ struct cn_callback_id {
struct cn_callback_data {
void (*destruct_data) (void *);
void *ddata;
-
- void *callback_priv;
- void (*callback) (void *);
+
+ struct sk_buff *skb;
+ void (*callback) (struct cn_msg *);

void *free;
};
--
1.6.0.4


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