Reproduce the patch against the latest source repo.
Add an atomic variable 'stopping' as flag in struct ceph_messenger,
set this flag to 1 in function ceph_destroy_client(), and add the condition code
in function ceph_data_ready() to test the flag value, if true(1), just return.
Signed-off-by: Guanjun He <gjhe@xxxxxxxx>
---
include/linux/ceph/messenger.h | 1 +
net/ceph/ceph_common.c | 2 ++
net/ceph/messenger.c | 5 +++++
3 files changed, 8 insertions(+), 0 deletions(-)
diff --git a/include/linux/ceph/messenger.h b/include/linux/ceph/messenger.h
index 2521a95..2586f34 100644
--- a/include/linux/ceph/messenger.h
+++ b/include/linux/ceph/messenger.h
@@ -53,6 +53,7 @@ struct ceph_messenger {
struct ceph_entity_inst inst; /* my name+address */
struct ceph_entity_addr my_enc_addr;
+ atomic_t stopping;
bool nocrc;
/*
diff --git a/net/ceph/ceph_common.c b/net/ceph/ceph_common.c
index ba4323b..478f3a4 100644
--- a/net/ceph/ceph_common.c
+++ b/net/ceph/ceph_common.c
@@ -501,6 +501,8 @@ void ceph_destroy_client(struct ceph_client *client)
{
dout("destroy_client %p\n", client);
+ atomic_set(&client->msgr->stopping, 1);
+
/* unmount */
ceph_osdc_stop(&client->osdc);
diff --git a/net/ceph/messenger.c b/net/ceph/messenger.c
index b332c3d..11ea62e 100644
--- a/net/ceph/messenger.c
+++ b/net/ceph/messenger.c
@@ -156,6 +156,9 @@ EXPORT_SYMBOL(ceph_msgr_flush);
static void ceph_data_ready(struct sock *sk, int count_unused)
{
struct ceph_connection *con = sk->sk_user_data;
+ if (atomic_read(&con->msgr->stopping)) {
+ return;
+ }
if (sk->sk_state != TCP_CLOSE_WAIT) {
dout("ceph_data_ready on %p state = %lu, queueing work\n",
@@ -2285,6 +2288,8 @@ struct ceph_messenger *ceph_messenger_create(struct ceph_entity_addr *myaddr,
get_random_bytes(&msgr->inst.addr.nonce, sizeof(msgr->inst.addr.nonce));
encode_my_addr(msgr);
+ atomic_set(&msgr->stopping, 0);
+
dout("messenger_create %p\n", msgr);
return msgr;
}
--
1.7.3.4
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