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rxrpc: Add a tracepoint to track rxrpc_local refcounting

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Add a tracepoint to track reference counting on the rxrpc_local struct.

Signed-off-by: David Howells <dhowells@redhat.com>
This commit is contained in:
David Howells 2018-03-30 21:05:28 +01:00
parent d3be4d2443
commit 09d2bf595d
4 changed files with 111 additions and 27 deletions
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65
net/rxrpc/local_object.c
View file

@ -95,6 +95,7 @@ static struct rxrpc_local *rxrpc_alloc_local(struct rxrpc_net *rxnet,
local->debug_id = atomic_inc_return(&rxrpc_debug_id);
memcpy(&local->srx, srx, sizeof(*srx));
local->srx.srx_service = 0;
trace_rxrpc_local(local, rxrpc_local_new, 1, NULL);
}
_leave(" = %p", local);
@ -256,15 +257,74 @@ addr_in_use:
return ERR_PTR(-EADDRINUSE);
}
/*
* Get a ref on a local endpoint.
*/
struct rxrpc_local *rxrpc_get_local(struct rxrpc_local *local)
{
const void *here = __builtin_return_address(0);
int n;
n = atomic_inc_return(&local->usage);
trace_rxrpc_local(local, rxrpc_local_got, n, here);
return local;
}
/*
* Get a ref on a local endpoint unless its usage has already reached 0.
*/
struct rxrpc_local *rxrpc_get_local_maybe(struct rxrpc_local *local)
{
const void *here = __builtin_return_address(0);
if (local) {
int n = __atomic_add_unless(&local->usage, 1, 0);
if (n > 0)
trace_rxrpc_local(local, rxrpc_local_got, n + 1, here);
else
local = NULL;
}
return local;
}
/*
* Queue a local endpoint.
*/
void rxrpc_queue_local(struct rxrpc_local *local)
{
const void *here = __builtin_return_address(0);
if (rxrpc_queue_work(&local->processor))
trace_rxrpc_local(local, rxrpc_local_queued,
atomic_read(&local->usage), here);
}
/*
* A local endpoint reached its end of life.
*/
void __rxrpc_put_local(struct rxrpc_local *local)
static void __rxrpc_put_local(struct rxrpc_local *local)
{
_enter("%d", local->debug_id);
rxrpc_queue_work(&local->processor);
}
/*
* Drop a ref on a local endpoint.
*/
void rxrpc_put_local(struct rxrpc_local *local)
{
const void *here = __builtin_return_address(0);
int n;
if (local) {
n = atomic_dec_return(&local->usage);
trace_rxrpc_local(local, rxrpc_local_put, n, here);
if (n == 0)
__rxrpc_put_local(local);
}
}
/*
* Destroy a local endpoint's socket and then hand the record to RCU to dispose
* of.
@ -322,7 +382,8 @@ static void rxrpc_local_processor(struct work_struct *work)
container_of(work, struct rxrpc_local, processor);
bool again;
_enter("%d", local->debug_id);
trace_rxrpc_local(local, rxrpc_local_processing,
atomic_read(&local->usage), NULL);
do {
again = false;