libceph: prevent the race of incoming work during teardown
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@suse.com>
Reviewed-by: Sage Weil <sage@inktank.com>
diff --git a/net/ceph/ceph_common.c b/net/ceph/ceph_common.c
index 58b09ef..3b45e01 100644
--- a/net/ceph/ceph_common.c
+++ b/net/ceph/ceph_common.c
@@ -495,6 +495,8 @@
{
dout("destroy_client %p\n", client);
+ atomic_set(&client->msgr.stopping, 1);
+
/* unmount */
ceph_osdc_stop(&client->osdc);