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-rw-r--r--fs/afs/rxrpc.c35
1 files changed, 30 insertions, 5 deletions
diff --git a/fs/afs/rxrpc.c b/fs/afs/rxrpc.c
index 4830e0a6bf1d..2c588f9bbbda 100644
--- a/fs/afs/rxrpc.c
+++ b/fs/afs/rxrpc.c
@@ -23,6 +23,7 @@ struct workqueue_struct *afs_async_calls;
static void afs_wake_up_call_waiter(struct sock *, struct rxrpc_call *, unsigned long);
static long afs_wait_for_call_to_complete(struct afs_call *, struct afs_addr_cursor *);
static void afs_wake_up_async_call(struct sock *, struct rxrpc_call *, unsigned long);
+static void afs_delete_async_call(struct work_struct *);
static void afs_process_async_call(struct work_struct *);
static void afs_rx_new_call(struct sock *, struct rxrpc_call *, unsigned long);
static void afs_rx_discard_new_call(struct rxrpc_call *, unsigned long);
@@ -404,6 +405,12 @@ long afs_make_call(struct afs_addr_cursor *ac, struct afs_call *call,
}
}
+ /* If the call is going to be asynchronous, we need an extra ref for
+ * the call to hold itself so the caller need not hang on to its ref.
+ */
+ if (call->async)
+ afs_get_call(call, afs_call_trace_get);
+
/* create a call */
rxcall = rxrpc_kernel_begin_call(call->net->socket, srx, call->key,
(unsigned long)call,
@@ -444,15 +451,17 @@ long afs_make_call(struct afs_addr_cursor *ac, struct afs_call *call,
goto error_do_abort;
}
- /* at this point, an async call may no longer exist as it may have
- * already completed */
- if (call->async)
+ /* Note that at this point, we may have received the reply or an abort
+ * - and an asynchronous call may already have completed.
+ */
+ if (call->async) {
+ afs_put_call(call);
return -EINPROGRESS;
+ }
return afs_wait_for_call_to_complete(call, ac);
error_do_abort:
- call->state = AFS_CALL_COMPLETE;
if (ret != -ECONNABORTED) {
rxrpc_kernel_abort_call(call->net->socket, rxcall,
RX_USER_ABORT, ret, "KSD");
@@ -469,8 +478,24 @@ error_do_abort:
error_kill_call:
if (call->type->done)
call->type->done(call);
- afs_put_call(call);
+
+ /* We need to dispose of the extra ref we grabbed for an async call.
+ * The call, however, might be queued on afs_async_calls and we need to
+ * make sure we don't get any more notifications that might requeue it.
+ */
+ if (call->rxcall) {
+ rxrpc_kernel_end_call(call->net->socket, call->rxcall);
+ call->rxcall = NULL;
+ }
+ if (call->async) {
+ if (cancel_work_sync(&call->async_work))
+ afs_put_call(call);
+ afs_put_call(call);
+ }
+
ac->error = ret;
+ call->state = AFS_CALL_COMPLETE;
+ afs_put_call(call);
_leave(" = %d", ret);
return ret;
}