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authorKrishnan Parthasarathi <kparthas@redhat.com>2013-05-28 14:23:49 +0530
committerAnand Avati <avati@redhat.com>2013-06-15 22:34:28 -0700
commit74fe3057270fabb79f311414dd9c47c6245b52c7 (patch)
treead97701f03822a19101c08b5f71e1013b8b91572 /rpc/rpc-lib
parentd6e5c6d8c489063df5aca8998903e11afee8439d (diff)
rpc: Cleanup rpc object in TRANSPORT_CLEANUP event
rpc_transport object should be alive as long as the rpc_clnt object is alive. To ensure this, on rpc_clnt's last unref, we cleanup the corresponding rpc_transport object and complete the rpc_clnt cleanup later, in a bottom-up fashion. Introduced rpc_clnt_is_disabled, to allow higher layers to differentiate between the 'final'[1] disconnect triggered from upper layers, and a normal disconnect. This differentiation helps in cleaning up resources, at higher layers, in a race-free manner. [1] - 'final' here means that the rpc and the associated connection, is not going to be used anymore. eg - glusterd_brick_disconnect on volume-stop. Change-Id: I2ecf891a36e3b02cd9eacca964e659525d1bbc6e BUG: 962619 Signed-off-by: Krishnan Parthasarathi <kparthas@redhat.com> Reviewed-on: http://review.gluster.org/5107 Tested-by: Gluster Build System <jenkins@build.gluster.com> Reviewed-by: Anand Avati <avati@redhat.com>
Diffstat (limited to 'rpc/rpc-lib')
-rw-r--r--rpc/rpc-lib/src/rpc-clnt.c49
-rw-r--r--rpc/rpc-lib/src/rpc-clnt.h3
-rw-r--r--rpc/rpc-lib/src/rpc-transport.c14
-rw-r--r--rpc/rpc-lib/src/rpc-transport.h3
4 files changed, 43 insertions, 26 deletions
diff --git a/rpc/rpc-lib/src/rpc-clnt.c b/rpc/rpc-lib/src/rpc-clnt.c
index c8bb8e2..b1d004a 100644
--- a/rpc/rpc-lib/src/rpc-clnt.c
+++ b/rpc/rpc-lib/src/rpc-clnt.c
@@ -819,6 +819,9 @@ out:
return;
}
+static void
+rpc_clnt_destroy (struct rpc_clnt *rpc);
+
int
rpc_clnt_notify (rpc_transport_t *trans, void *mydata,
rpc_transport_event_t event, void *data, ...)
@@ -864,9 +867,7 @@ rpc_clnt_notify (rpc_transport_t *trans, void *mydata,
}
case RPC_TRANSPORT_CLEANUP:
- /* this event should not be received on a client for, a
- * transport is only disconnected, but never destroyed.
- */
+ rpc_clnt_destroy (clnt);
ret = 0;
break;
@@ -1541,18 +1542,21 @@ rpc_clnt_ref (struct rpc_clnt *rpc)
static void
-rpc_clnt_destroy (struct rpc_clnt *rpc)
+rpc_clnt_trigger_destroy (struct rpc_clnt *rpc)
{
if (!rpc)
return;
- if (rpc->conn.trans) {
- rpc_transport_unregister_notify (rpc->conn.trans);
- rpc_transport_disconnect (rpc->conn.trans);
- rpc_transport_unref (rpc->conn.trans);
- }
+ rpc_clnt_disable (rpc);
+ rpc_transport_unref (rpc->conn.trans);
+}
+
+static void
+rpc_clnt_destroy (struct rpc_clnt *rpc)
+{
+ if (!rpc)
+ return;
- rpc_clnt_reconnect_cleanup (&rpc->conn);
saved_frames_destroy (rpc->conn.saved_frames);
pthread_mutex_destroy (&rpc->lock);
pthread_mutex_destroy (&rpc->conn.lock);
@@ -1579,13 +1583,36 @@ rpc_clnt_unref (struct rpc_clnt *rpc)
}
pthread_mutex_unlock (&rpc->lock);
if (!count) {
- rpc_clnt_destroy (rpc);
+ rpc_clnt_trigger_destroy (rpc);
return NULL;
}
return rpc;
}
+char
+rpc_clnt_is_disabled (struct rpc_clnt *rpc)
+{
+
+ rpc_clnt_connection_t *conn = NULL;
+ char disabled = 0;
+
+ if (!rpc) {
+ goto out;
+ }
+
+ conn = &rpc->conn;
+
+ pthread_mutex_lock (&conn->lock);
+ {
+ disabled = rpc->disabled;
+ }
+ pthread_mutex_unlock (&conn->lock);
+
+out:
+ return disabled;
+}
+
void
rpc_clnt_disable (struct rpc_clnt *rpc)
{
diff --git a/rpc/rpc-lib/src/rpc-clnt.h b/rpc/rpc-lib/src/rpc-clnt.h
index 1f74e55..584963a 100644
--- a/rpc/rpc-lib/src/rpc-clnt.h
+++ b/rpc/rpc-lib/src/rpc-clnt.h
@@ -240,4 +240,7 @@ int rpcclnt_cbk_program_register (struct rpc_clnt *svc,
void
rpc_clnt_disable (struct rpc_clnt *rpc);
+char
+rpc_clnt_is_disabled (struct rpc_clnt *rpc);
+
#endif /* !_RPC_CLNT_H */
diff --git a/rpc/rpc-lib/src/rpc-transport.c b/rpc/rpc-lib/src/rpc-transport.c
index 55ff0a3..89f3b3e 100644
--- a/rpc/rpc-lib/src/rpc-transport.c
+++ b/rpc/rpc-lib/src/rpc-transport.c
@@ -477,6 +477,8 @@ rpc_transport_unref (rpc_transport_t *this)
if (this->mydata)
this->notify (this, this->mydata, RPC_TRANSPORT_CLEANUP,
NULL);
+ this->mydata = NULL;
+ this->notify = NULL;
rpc_transport_destroy (this);
}
@@ -520,18 +522,6 @@ out:
}
-inline int
-rpc_transport_unregister_notify (rpc_transport_t *trans)
-{
- GF_VALIDATE_OR_GOTO ("rpc-transport", trans, out);
-
- trans->notify = NULL;
- trans->mydata = NULL;
-
-out:
- return 0;
-}
-
//give negative values to skip setting that value
//this function asserts if both the values are negative.
diff --git a/rpc/rpc-lib/src/rpc-transport.h b/rpc/rpc-lib/src/rpc-transport.h
index 9e78b5a..a8744d6 100644
--- a/rpc/rpc-lib/src/rpc-transport.h
+++ b/rpc/rpc-lib/src/rpc-transport.h
@@ -273,9 +273,6 @@ int
rpc_transport_register_notify (rpc_transport_t *trans, rpc_transport_notify_t,
void *mydata);
-int
-rpc_transport_unregister_notify (rpc_transport_t *trans);
-
int32_t
rpc_transport_get_peername (rpc_transport_t *this, char *hostname, int hostlen);