rxrpc, afs: Use debug_ids rather than pointers in traces

In rxrpc and afs, use the debug_ids that are monotonically allocated to
various objects as they're allocated rather than pointers as kernel
pointers are now hashed making them less useful.  Further, the debug ids
aren't reused anywhere nearly as quickly.

In addition, allow kernel services that use rxrpc, such as afs, to take
numbers from the rxrpc counter, assign them to their own call struct and
pass them in to rxrpc for both client and service calls so that the trace
lines for each will have the same ID tag.

Signed-off-by: David Howells <dhowells@redhat.com>

12 files changed, 163 insertions, 145 deletions

diff --git a/fs/afs/internal.h b/fs/afs/internal.h
index f38d6a561a84..72217170b155 100644
--- a/fs/afs/internal.h
+++ b/fs/afs/internal.h
@@ -118,6 +118,7 @@ struct afs_call {
 	bool			ret_reply0;	/* T if should return reply[0] on success */
 	bool			upgrade;	/* T to request service upgrade */
 	u16			service_id;	/* Actual service ID (after upgrade) */
+	unsigned int		debug_id;	/* Trace ID */
 	u32			operation_ID;	/* operation ID for an incoming call */
 	u32			count;		/* count for use in unmarshalling */
 	__be32			tmp;		/* place to extract temporary data */
diff --git a/fs/afs/rxrpc.c b/fs/afs/rxrpc.c
index e1126659f043..b819900916e6 100644
--- a/fs/afs/rxrpc.c
+++ b/fs/afs/rxrpc.c
@@ -131,6 +131,7 @@ static struct afs_call *afs_alloc_call(struct afs_net *net,
 
 	call->type = type;
 	call->net = net;
+	call->debug_id = atomic_inc_return(&rxrpc_debug_id);
 	atomic_set(&call->usage, 1);
 	INIT_WORK(&call->async_work, afs_process_async_call);
 	init_waitqueue_head(&call->waitq);
@@ -169,11 +170,12 @@ void afs_put_call(struct afs_call *call)
 		afs_put_server(call->net, call->cm_server);
 		afs_put_cb_interest(call->net, call->cbi);
 		kfree(call->request);
-		kfree(call);
 
-		o = atomic_dec_return(&net->nr_outstanding_calls);
 		trace_afs_call(call, afs_call_trace_free, 0, o,
 			       __builtin_return_address(0));
+		kfree(call);
+
+		o = atomic_dec_return(&net->nr_outstanding_calls);
 		if (o == 0)
 			wake_up_atomic_t(&net->nr_outstanding_calls);
 	}
@@ -378,7 +380,8 @@ long afs_make_call(struct afs_addr_cursor *ac, struct afs_call *call,
 					 (async ?
 					  afs_wake_up_async_call :
 					  afs_wake_up_call_waiter),
-					 call->upgrade);
+					 call->upgrade,
+					 call->debug_id);
 	if (IS_ERR(rxcall)) {
 		ret = PTR_ERR(rxcall);
 		goto error_kill_call;
@@ -727,7 +730,8 @@ void afs_charge_preallocation(struct work_struct *work)
 					       afs_wake_up_async_call,
 					       afs_rx_attach,
 					       (unsigned long)call,
-					       GFP_KERNEL) < 0)
+					       GFP_KERNEL,
+					       call->debug_id) < 0)
 			break;
 		call = NULL;
 	}
diff --git a/include/net/af_rxrpc.h b/include/net/af_rxrpc.h
index 2b3a6eec4570..8ae8ee004258 100644
--- a/include/net/af_rxrpc.h
+++ b/include/net/af_rxrpc.h
@@ -31,6 +31,11 @@ enum rxrpc_call_completion {
 	NR__RXRPC_CALL_COMPLETIONS
 };
 
+/*
+ * Debug ID counter for tracing.
+ */
+extern atomic_t rxrpc_debug_id;
+
 typedef void (*rxrpc_notify_rx_t)(struct sock *, struct rxrpc_call *,
 				  unsigned long);
 typedef void (*rxrpc_notify_end_tx_t)(struct sock *, struct rxrpc_call *,
@@ -50,7 +55,8 @@ struct rxrpc_call *rxrpc_kernel_begin_call(struct socket *,
 					   s64,
 					   gfp_t,
 					   rxrpc_notify_rx_t,
-					   bool);
+					   bool,
+					   unsigned int);
 int rxrpc_kernel_send_data(struct socket *, struct rxrpc_call *,
 			   struct msghdr *, size_t,
 			   rxrpc_notify_end_tx_t);
@@ -63,7 +69,8 @@ void rxrpc_kernel_get_peer(struct socket *, struct rxrpc_call *,
 			   struct sockaddr_rxrpc *);
 u64 rxrpc_kernel_get_rtt(struct socket *, struct rxrpc_call *);
 int rxrpc_kernel_charge_accept(struct socket *, rxrpc_notify_rx_t,
-			       rxrpc_user_attach_call_t, unsigned long, gfp_t);
+			       rxrpc_user_attach_call_t, unsigned long, gfp_t,
+			       unsigned int);
 void rxrpc_kernel_set_tx_length(struct socket *, struct rxrpc_call *, s64);
 int rxrpc_kernel_retry_call(struct socket *, struct rxrpc_call *,
 			    struct sockaddr_rxrpc *, struct key *);
diff --git a/include/trace/events/afs.h b/include/trace/events/afs.h
index 6b59c63a8e51..63815f66b274 100644
--- a/include/trace/events/afs.h
+++ b/include/trace/events/afs.h
@@ -133,8 +133,7 @@ TRACE_EVENT(afs_recv_data,
 	    TP_ARGS(call, count, offset, want_more, ret),
 
 	    TP_STRUCT__entry(
-		    __field(struct rxrpc_call *,	rxcall		)
-		    __field(struct afs_call *,		call		)
+		    __field(unsigned int,		call		)
 		    __field(enum afs_call_state,	state		)
 		    __field(unsigned int,		count		)
 		    __field(unsigned int,		offset		)
@@ -144,8 +143,7 @@ TRACE_EVENT(afs_recv_data,
 			     ),
 
 	    TP_fast_assign(
-		    __entry->rxcall	= call->rxcall;
-		    __entry->call	= call;
+		    __entry->call	= call->debug_id;
 		    __entry->state	= call->state;
 		    __entry->unmarshall	= call->unmarshall;
 		    __entry->count	= count;
@@ -154,8 +152,7 @@ TRACE_EVENT(afs_recv_data,
 		    __entry->ret	= ret;
 			   ),
 
-	    TP_printk("c=%p ac=%p s=%u u=%u %u/%u wm=%u ret=%d",
-		      __entry->rxcall,
+	    TP_printk("c=%08x s=%u u=%u %u/%u wm=%u ret=%d",
 		      __entry->call,
 		      __entry->state, __entry->unmarshall,
 		      __entry->offset, __entry->count,
@@ -168,21 +165,18 @@ TRACE_EVENT(afs_notify_call,
 	    TP_ARGS(rxcall, call),
 
 	    TP_STRUCT__entry(
-		    __field(struct rxrpc_call *,	rxcall		)
-		    __field(struct afs_call *,		call		)
+		    __field(unsigned int,		call		)
 		    __field(enum afs_call_state,	state		)
 		    __field(unsigned short,		unmarshall	)
 			     ),
 
 	    TP_fast_assign(
-		    __entry->rxcall	= rxcall;
-		    __entry->call	= call;
+		    __entry->call	= call->debug_id;
 		    __entry->state	= call->state;
 		    __entry->unmarshall	= call->unmarshall;
 			   ),
 
-	    TP_printk("c=%p ac=%p s=%u u=%u",
-		      __entry->rxcall,
+	    TP_printk("c=%08x s=%u u=%u",
 		      __entry->call,
 		      __entry->state, __entry->unmarshall)
 	    );
@@ -193,21 +187,18 @@ TRACE_EVENT(afs_cb_call,
 	    TP_ARGS(call),
 
 	    TP_STRUCT__entry(
-		    __field(struct rxrpc_call *,	rxcall		)
-		    __field(struct afs_call *,		call		)
+		    __field(unsigned int,		call		)
 		    __field(const char *,		name		)
 		    __field(u32,			op		)
 			     ),
 
 	    TP_fast_assign(
-		    __entry->rxcall	= call->rxcall;
-		    __entry->call	= call;
+		    __entry->call	= call->debug_id;
 		    __entry->name	= call->type->name;
 		    __entry->op		= call->operation_ID;
 			   ),
 
-	    TP_printk("c=%p ac=%p %s o=%u",
-		      __entry->rxcall,
+	    TP_printk("c=%08x %s o=%u",
 		      __entry->call,
 		      __entry->name,
 		      __entry->op)
@@ -220,7 +211,7 @@ TRACE_EVENT(afs_call,
 	    TP_ARGS(call, op, usage, outstanding, where),
 
 	    TP_STRUCT__entry(
-		    __field(struct afs_call *,		call		)
+		    __field(unsigned int,		call		)
 		    __field(int,			op		)
 		    __field(int,			usage		)
 		    __field(int,			outstanding	)
@@ -228,14 +219,14 @@ TRACE_EVENT(afs_call,
 			     ),
 
 	    TP_fast_assign(
-		    __entry->call = call;
+		    __entry->call = call->debug_id;
 		    __entry->op = op;
 		    __entry->usage = usage;
 		    __entry->outstanding = outstanding;
 		    __entry->where = where;
 			   ),
 
-	    TP_printk("c=%p %s u=%d o=%d sp=%pSR",
+	    TP_printk("c=%08x %s u=%d o=%d sp=%pSR",
 		      __entry->call,
 		      __print_symbolic(__entry->op, afs_call_traces),
 		      __entry->usage,
@@ -249,13 +240,13 @@ TRACE_EVENT(afs_make_fs_call,
 	    TP_ARGS(call, fid),
 
 	    TP_STRUCT__entry(
-		    __field(struct afs_call *,		call		)
+		    __field(unsigned int,		call		)
 		    __field(enum afs_fs_operation,	op		)
 		    __field_struct(struct afs_fid,	fid		)
 			     ),
 
 	    TP_fast_assign(
-		    __entry->call = call;
+		    __entry->call = call->debug_id;
 		    __entry->op = call->operation_ID;
 		    if (fid) {
 			    __entry->fid = *fid;
@@ -266,7 +257,7 @@ TRACE_EVENT(afs_make_fs_call,
 		    }
 			   ),
 
-	    TP_printk("c=%p %06x:%06x:%06x %s",
+	    TP_printk("c=%08x %06x:%06x:%06x %s",
 		      __entry->call,
 		      __entry->fid.vid,
 		      __entry->fid.vnode,
@@ -280,16 +271,16 @@ TRACE_EVENT(afs_make_vl_call,
 	    TP_ARGS(call),
 
 	    TP_STRUCT__entry(
-		    __field(struct afs_call *,		call		)
+		    __field(unsigned int,		call		)
 		    __field(enum afs_vl_operation,	op		)
 			     ),
 
 	    TP_fast_assign(
-		    __entry->call = call;
+		    __entry->call = call->debug_id;
 		    __entry->op = call->operation_ID;
 			   ),
 
-	    TP_printk("c=%p %s",
+	    TP_printk("c=%08x %s",
 		      __entry->call,
 		      __print_symbolic(__entry->op, afs_vl_operations))
 	    );
@@ -300,20 +291,20 @@ TRACE_EVENT(afs_call_done,
 	    TP_ARGS(call),
 
 	    TP_STRUCT__entry(
-		    __field(struct afs_call *,		call		)
+		    __field(unsigned int,		call		)
 		    __field(struct rxrpc_call *,	rx_call		)
 		    __field(int,			ret		)
 		    __field(u32,			abort_code	)
 			     ),
 
 	    TP_fast_assign(
-		    __entry->call = call;
+		    __entry->call = call->debug_id;
 		    __entry->rx_call = call->rxcall;
 		    __entry->ret = call->error;
 		    __entry->abort_code = call->abort_code;
 			   ),
 
-	    TP_printk("   c=%p ret=%d ab=%d [%p]",
+	    TP_printk("   c=%08x ret=%d ab=%d [%p]",
 		      __entry->call,
 		      __entry->ret,
 		      __entry->abort_code,
@@ -327,7 +318,7 @@ TRACE_EVENT(afs_send_pages,
 	    TP_ARGS(call, msg, first, last, offset),
 
 	    TP_STRUCT__entry(
-		    __field(struct afs_call *,		call		)
+		    __field(unsigned int,		call		)
 		    __field(pgoff_t,			first		)
 		    __field(pgoff_t,			last		)
 		    __field(unsigned int,		nr		)
@@ -337,7 +328,7 @@ TRACE_EVENT(afs_send_pages,
 			     ),
 
 	    TP_fast_assign(
-		    __entry->call = call;
+		    __entry->call = call->debug_id;
 		    __entry->first = first;
 		    __entry->last = last;
 		    __entry->nr = msg->msg_iter.nr_segs;
@@ -346,7 +337,7 @@ TRACE_EVENT(afs_send_pages,
 		    __entry->flags = msg->msg_flags;
 			   ),
 
-	    TP_printk(" c=%p %lx-%lx-%lx b=%x o=%x f=%x",
+	    TP_printk(" c=%08x %lx-%lx-%lx b=%x o=%x f=%x",
 		      __entry->call,
 		      __entry->first, __entry->first + __entry->nr - 1, __entry->last,
 		      __entry->bytes, __entry->offset,
@@ -360,7 +351,7 @@ TRACE_EVENT(afs_sent_pages,
 	    TP_ARGS(call, first, last, cursor, ret),
 
 	    TP_STRUCT__entry(
-		    __field(struct afs_call *,		call		)
+		    __field(unsigned int,		call		)
 		    __field(pgoff_t,			first		)
 		    __field(pgoff_t,			last		)
 		    __field(pgoff_t,			cursor		)
@@ -368,14 +359,14 @@ TRACE_EVENT(afs_sent_pages,
 			     ),
 
 	    TP_fast_assign(
-		    __entry->call = call;
+		    __entry->call = call->debug_id;
 		    __entry->first = first;
 		    __entry->last = last;
 		    __entry->cursor = cursor;
 		    __entry->ret = ret;
 			   ),
 
-	    TP_printk(" c=%p %lx-%lx c=%lx r=%d",
+	    TP_printk(" c=%08x %lx-%lx c=%lx r=%d",
 		      __entry->call,
 		      __entry->first, __entry->last,
 		      __entry->cursor, __entry->ret)
@@ -450,7 +441,7 @@ TRACE_EVENT(afs_call_state,
 	    TP_ARGS(call, from, to, ret, remote_abort),
 
 	    TP_STRUCT__entry(
-		    __field(struct afs_call *,		call		)
+		    __field(unsigned int,		call		)
 		    __field(enum afs_call_state,	from		)
 		    __field(enum afs_call_state,	to		)
 		    __field(int,			ret		)
@@ -458,14 +449,14 @@ TRACE_EVENT(afs_call_state,
 			     ),
 
 	    TP_fast_assign(
-		    __entry->call = call;
+		    __entry->call = call->debug_id;
 		    __entry->from = from;
 		    __entry->to = to;
 		    __entry->ret = ret;
 		    __entry->abort = remote_abort;
 			   ),
 
-	    TP_printk("c=%p %u->%u r=%d ab=%d",
+	    TP_printk("c=%08x %u->%u r=%d ab=%d",
 		      __entry->call,
 		      __entry->from, __entry->to,
 		      __entry->ret, __entry->abort)
diff --git a/include/trace/events/rxrpc.h b/include/trace/events/rxrpc.h
index 41979f907575..4d2c2d35c5cb 100644
--- a/include/trace/events/rxrpc.h
+++ b/include/trace/events/rxrpc.h
@@ -439,20 +439,20 @@ TRACE_EVENT(rxrpc_conn,
 	    TP_ARGS(conn, op, usage, where),
 
 	    TP_STRUCT__entry(
-		    __field(struct rxrpc_connection *,	conn		)
-		    __field(int,			op		)
-		    __field(int,			usage		)
-		    __field(const void *,		where		)
+		    __field(unsigned int,	conn		)
+		    __field(int,		op		)
+		    __field(int,		usage		)
+		    __field(const void *,	where		)
 			     ),
 
 	    TP_fast_assign(
-		    __entry->conn = conn;
+		    __entry->conn = conn->debug_id;
 		    __entry->op = op;
 		    __entry->usage = usage;
 		    __entry->where = where;
 			   ),
 
-	    TP_printk("C=%p %s u=%d sp=%pSR",
+	    TP_printk("C=%08x %s u=%d sp=%pSR",
 		      __entry->conn,
 		      __print_symbolic(__entry->op, rxrpc_conn_traces),
 		      __entry->usage,
@@ -466,7 +466,7 @@ TRACE_EVENT(rxrpc_client,
 	    TP_ARGS(conn, channel, op),
 
 	    TP_STRUCT__entry(
-		    __field(struct rxrpc_connection *,	conn		)
+		    __field(unsigned int,		conn		)
 		    __field(u32,			cid		)
 		    __field(int,			channel		)
 		    __field(int,			usage		)
@@ -475,7 +475,7 @@ TRACE_EVENT(rxrpc_client,
 			     ),
 
 	    TP_fast_assign(
-		    __entry->conn = conn;
+		    __entry->conn = conn->debug_id;
 		    __entry->channel = channel;
 		    __entry->usage = atomic_read(&conn->usage);
 		    __entry->op = op;
@@ -483,7 +483,7 @@ TRACE_EVENT(rxrpc_client,
 		    __entry->cs = conn->cache_state;
 			   ),
 
-	    TP_printk("C=%p h=%2d %s %s i=%08x u=%d",
+	    TP_printk("C=%08x h=%2d %s %s i=%08x u=%d",
 		      __entry->conn,
 		      __entry->channel,
 		      __print_symbolic(__entry->op, rxrpc_client_traces),
@@ -499,7 +499,7 @@ TRACE_EVENT(rxrpc_call,
 	    TP_ARGS(call, op, usage, where, aux),
 
 	    TP_STRUCT__entry(
-		    __field(struct rxrpc_call *,	call		)
+		    __field(unsigned int,		call		)
 		    __field(int,			op		)
 		    __field(int,			usage		)
 		    __field(const void *,		where		)
@@ -507,14 +507,14 @@ TRACE_EVENT(rxrpc_call,
 			     ),
 
 	    TP_fast_assign(
-		    __entry->call = call;
+		    __entry->call = call->debug_id;
 		    __entry->op = op;
 		    __entry->usage = usage;
 		    __entry->where = where;
 		    __entry->aux = aux;
 			   ),
 
-	    TP_printk("c=%p %s u=%d sp=%pSR a=%p",
+	    TP_printk("c=%08x %s u=%d sp=%pSR a=%p",
 		      __entry->call,
 		      __print_symbolic(__entry->op, rxrpc_call_traces),
 		      __entry->usage,
@@ -593,12 +593,13 @@ TRACE_EVENT(rxrpc_rx_done,
 	    );
 
 TRACE_EVENT(rxrpc_abort,
-	    TP_PROTO(const char *why, u32 cid, u32 call_id, rxrpc_seq_t seq,
-		     int abort_code, int error),
+	    TP_PROTO(unsigned int call_nr, const char *why, u32 cid, u32 call_id,
+		     rxrpc_seq_t seq, int abort_code, int error),
 
-	    TP_ARGS(why, cid, call_id, seq, abort_code, error),
+	    TP_ARGS(call_nr, why, cid, call_id, seq, abort_code, error),
 
 	    TP_STRUCT__entry(
+		    __field(unsigned int,		call_nr		)
 		    __array(char,			why, 4		)
 		    __field(u32,			cid		)
 		    __field(u32,			call_id		)
@@ -609,6 +610,7 @@ TRACE_EVENT(rxrpc_abort,
 
 	    TP_fast_assign(
 		    memcpy(__entry->why, why, 4);
+		    __entry->call_nr = call_nr;
 		    __entry->cid = cid;
 		    __entry->call_id = call_id;
 		    __entry->abort_code = abort_code;
@@ -616,7 +618,8 @@ TRACE_EVENT(rxrpc_abort,
 		    __entry->seq = seq;
 			   ),
 
-	    TP_printk("%08x:%08x s=%u a=%d e=%d %s",
+	    TP_printk("c=%08x %08x:%08x s=%u a=%d e=%d %s",
+		      __entry->call_nr,
 		      __entry->cid, __entry->call_id, __entry->seq,
 		      __entry->abort_code, __entry->error, __entry->why)
 	    );
@@ -627,7 +630,7 @@ TRACE_EVENT(rxrpc_transmit,
 	    TP_ARGS(call, why),
 
 	    TP_STRUCT__entry(
-		    __field(struct rxrpc_call *,	call		)
+		    __field(unsigned int,		call		)
 		    __field(enum rxrpc_transmit_trace,	why		)
 		    __field(rxrpc_seq_t,		tx_hard_ack	)
 		    __field(rxrpc_seq_t,		tx_top		)
@@ -635,14 +638,14 @@ TRACE_EVENT(rxrpc_transmit,
 			     ),
 
 	    TP_fast_assign(
-		    __entry->call = call;
+		    __entry->call = call->debug_id;
 		    __entry->why = why;
 		    __entry->tx_hard_ack = call->tx_hard_ack;
 		    __entry->tx_top = call->tx_top;
 		    __entry->tx_winsize = call->tx_winsize;
 			   ),
 
-	    TP_printk("c=%p %s f=%08x n=%u/%u",
+	    TP_printk("c=%08x %s f=%08x n=%u/%u",
 		      __entry->call,
 		      __print_symbolic(__entry->why, rxrpc_transmit_traces),
 		      __entry->tx_hard_ack + 1,
@@ -657,7 +660,7 @@ TRACE_EVENT(rxrpc_rx_data,
 	    TP_ARGS(call, seq, serial, flags, anno),
 
 	    TP_STRUCT__entry(
-		    __field(struct rxrpc_call *,	call		)
+		    __field(unsigned int,		call		)
 		    __field(rxrpc_seq_t,		seq		)
 		    __field(rxrpc_serial_t,		serial		)
 		    __field(u8,				flags		)
@@ -665,14 +668,14 @@ TRACE_EVENT(rxrpc_rx_data,
 			     ),
 
 	    TP_fast_assign(
-		    __entry->call = call;
+		    __entry->call = call->debug_id;
 		    __entry->seq = seq;
 		    __entry->serial = serial;
 		    __entry->flags = flags;
 		    __entry->anno = anno;
 			   ),
 
-	    TP_printk("c=%p DATA %08x q=%08x fl=%02x a=%02x",
+	    TP_printk("c=%08x DATA %08x q=%08x fl=%02x a=%02x",
 		      __entry->call,
 		      __entry->serial,
 		      __entry->seq,
@@ -688,7 +691,7 @@ TRACE_EVENT(rxrpc_rx_ack,
 	    TP_ARGS(call, serial, ack_serial, first, prev, reason, n_acks),
 
 	    TP_STRUCT__entry(
-		    __field(struct rxrpc_call *,	call		)
+		    __field(unsigned int,		call		)
 		    __field(rxrpc_serial_t,		serial		)
 		    __field(rxrpc_serial_t,		ack_serial	)
 		    __field(rxrpc_seq_t,		first		)
@@ -698,7 +701,7 @@ TRACE_EVENT(rxrpc_rx_ack,
 			     ),
 
 	    TP_fast_assign(
-		    __entry->call = call;
+		    __entry->call = call->debug_id;
 		    __entry->serial = serial;
 		    __entry->ack_serial = ack_serial;
 		    __entry->first = first;
@@ -707,7 +710,7 @@ TRACE_EVENT(rxrpc_rx_ack,
 		    __entry->n_acks = n_acks;
 			   ),
 
-	    TP_printk("c=%p %08x %s r=%08x f=%08x p=%08x n=%u",
+	    TP_printk("c=%08x %08x %s r=%08x f=%08x p=%08x n=%u",
 		      __entry->call,
 		      __entry->serial,
 		      __print_symbolic(__entry->reason, rxrpc_ack_names),
@@ -724,18 +727,18 @@ TRACE_EVENT(rxrpc_rx_abort,
 	    TP_ARGS(call, serial, abort_code),
 
 	    TP_STRUCT__entry(
-		    __field(struct rxrpc_call *,	call		)
+		    __field(unsigned int,		call		)
 		    __field(rxrpc_serial_t,		serial		)
 		    __field(u32,			abort_code	)
 			     ),
 
 	    TP_fast_assign(
-		    __entry->call = call;
+		    __entry->call = call->debug_id;
 		    __entry->serial = serial;
 		    __entry->abort_code = abort_code;
 			   ),
 
-	    TP_printk("c=%p ABORT %08x ac=%d",
+	    TP_printk("c=%08x ABORT %08x ac=%d",
 		      __entry->call,
 		      __entry->serial,
 		      __entry->abort_code)
@@ -748,20 +751,20 @@ TRACE_EVENT(rxrpc_rx_rwind_change,
 	    TP_ARGS(call, serial, rwind, wake),
 
 	    TP_STRUCT__entry(
-		    __field(struct rxrpc_call *,	call		)
+		    __field(unsigned int,		call		)
 		    __field(rxrpc_serial_t,		serial		)
 		    __field(u32,			rwind		)
 		    __field(bool,			wake		)
 			     ),
 
 	    TP_fast_assign(
-		    __entry->call = call;
+		    __entry->call = call->debug_id;
 		    __entry->serial = serial;
 		    __entry->rwind = rwind;
 		    __entry->wake = wake;
 			   ),
 
-	    TP_printk("c=%p %08x rw=%u%s",
+	    TP_printk("c=%08x %08x rw=%u%s",
 		      __entry->call,
 		      __entry->serial,
 		      __entry->rwind,
@@ -775,7 +778,7 @@ TRACE_EVENT(rxrpc_tx_data,
 	    TP_ARGS(call, seq, serial, flags, retrans, lose),
 
 	    TP_STRUCT__entry(
-		    __field(struct rxrpc_call *,	call		)
+		    __field(unsigned int,		call		)
 		    __field(rxrpc_seq_t,		seq		)
 		    __field(rxrpc_serial_t,		serial		)
 		    __field(u8,				flags		)
@@ -784,7 +787,7 @@ TRACE_EVENT(rxrpc_tx_data,
 			     ),
 
 	    TP_fast_assign(
-		    __entry->call = call;
+		    __entry->call = call->debug_id;
 		    __entry->seq = seq;
 		    __entry->serial = serial;
 		    __entry->flags = flags;
@@ -792,7 +795,7 @@ TRACE_EVENT(rxrpc_tx_data,
 		    __entry->lose = lose;
 			   ),
 
-	    TP_printk("c=%p DATA %08x q=%08x fl=%02x%s%s",
+	    TP_printk("c=%08x DATA %08x q=%08x fl=%02x%s%s",
 		      __entry->call,
 		      __entry->serial,
 		      __entry->seq,
@@ -809,7 +812,7 @@ TRACE_EVENT(rxrpc_tx_ack,
 	    TP_ARGS(call, serial, ack_first, ack_serial, reason, n_acks),
 
 	    TP_STRUCT__entry(
-		    __field(struct rxrpc_call *,	call		)
+		    __field(unsigned int,		call		)
 		    __field(rxrpc_serial_t,		serial		)
 		    __field(rxrpc_seq_t,		ack_first	)
 		    __field(rxrpc_serial_t,		ack_serial	)
@@ -818,7 +821,7 @@ TRACE_EVENT(rxrpc_tx_ack,
 			     ),
 
 	    TP_fast_assign(
-		    __entry->call = call;
+		    __entry->call = call ? call->debug_id : 0;
 		    __entry->serial = serial;
 		    __entry->ack_first = ack_first;
 		    __entry->ack_serial = ack_serial;
@@ -826,7 +829,7 @@ TRACE_EVENT(rxrpc_tx_ack,
 		    __entry->n_acks = n_acks;
 			   ),
 
-	    TP_printk(" c=%p ACK  %08x %s f=%08x r=%08x n=%u",
+	    TP_printk(" c=%08x ACK  %08x %s f=%08x r=%08x n=%u",
 		      __entry->call,
 		      __entry->serial,
 		      __print_symbolic(__entry->reason, rxrpc_ack_names),
@@ -842,7 +845,7 @@ TRACE_EVENT(rxrpc_receive,
 	    TP_ARGS(call, why, serial, seq),
 
 	    TP_STRUCT__entry(
-		    __field(struct rxrpc_call *,	call		)
+		    __field(unsigned int,		call		)
 		    __field(enum rxrpc_receive_trace,	why		)
 		    __field(rxrpc_serial_t,		serial		)
 		    __field(rxrpc_seq_t,		seq		)
@@ -851,7 +854,7 @@ TRACE_EVENT(rxrpc_receive,
 			     ),
 
 	    TP_fast_assign(
-		    __entry->call = call;
+		    __entry->call = call->debug_id;
 		    __entry->why = why;
 		    __entry->serial = serial;
 		    __entry->seq = seq;
@@ -859,7 +862,7 @@ TRACE_EVENT(rxrpc_receive,
 		    __entry->top = call->rx_top;
 			   ),
 
-	    TP_printk("c=%p %s r=%08x q=%08x w=%08x-%08x",
+	    TP_printk("c=%08x %s r=%08x q=%08x w=%08x-%08x",
 		      __entry->call,
 		      __print_symbolic(__entry->why, rxrpc_receive_traces),
 		      __entry->serial,
@@ -876,7 +879,7 @@ TRACE_EVENT(rxrpc_recvmsg,
 	    TP_ARGS(call, why, seq, offset, len, ret),
 
 	    TP_STRUCT__entry(
-		    __field(struct rxrpc_call *,	call		)
+		    __field(unsigned int,		call		)
 		    __field(enum rxrpc_recvmsg_trace,	why		)
 		    __field(rxrpc_seq_t,		seq		)
 		    __field(unsigned int,		offset		)
@@ -885,7 +888,7 @@ TRACE_EVENT(rxrpc_recvmsg,
 			     ),
 
 	    TP_fast_assign(
-		    __entry->call = call;
+		    __entry->call = call->debug_id;
 		    __entry->why = why;
 		    __entry->seq = seq;
 		    __entry->offset = offset;
@@ -893,7 +896,7 @@ TRACE_EVENT(rxrpc_recvmsg,
 		    __entry->ret = ret;
 			   ),
 
-	    TP_printk("c=%p %s q=%08x o=%u l=%u ret=%d",
+	    TP_printk("c=%08x %s q=%08x o=%u l=%u ret=%d",
 		      __entry->call,
 		      __print_symbolic(__entry->why, rxrpc_recvmsg_traces),
 		      __entry->seq,
@@ -909,18 +912,18 @@ TRACE_EVENT(rxrpc_rtt_tx,
 	    TP_ARGS(call, why, send_serial),
 
 	    TP_STRUCT__entry(
-		    __field(struct rxrpc_call *,	call		)
+		    __field(unsigned int,		call		)
 		    __field(enum rxrpc_rtt_tx_trace,	why		)
 		    __field(rxrpc_serial_t,		send_serial	)
 			     ),
 
 	    TP_fast_assign(
-		    __entry->call = call;
+		    __entry->call = call->debug_id;
 		    __entry->why = why;
 		    __entry->send_serial = send_serial;
 			   ),
 
-	    TP_printk("c=%p %s sr=%08x",
+	    TP_printk("c=%08x %s sr=%08x",
 		      __entry->call,
 		      __print_symbolic(__entry->why, rxrpc_rtt_tx_traces),
 		      __entry->send_serial)
@@ -934,7 +937,7 @@ TRACE_EVENT(rxrpc_rtt_rx,
 	    TP_ARGS(call, why, send_serial, resp_serial, rtt, nr, avg),
 
 	    TP_STRUCT__entry(
-		    __field(struct rxrpc_call *,	call		)
+		    __field(unsigned int,		call		)
 		    __field(enum rxrpc_rtt_rx_trace,	why		)
 		    __field(u8,				nr		)
 		    __field(rxrpc_serial_t,		send_serial	)
@@ -944,7 +947,7 @@ TRACE_EVENT(rxrpc_rtt_rx,
 			     ),
 
 	    TP_fast_assign(
-		    __entry->call = call;
+		    __entry->call = call->debug_id;
 		    __entry->why = why;
 		    __entry->send_serial = send_serial;
 		    __entry->resp_serial = resp_serial;
@@ -953,7 +956,7 @@ TRACE_EVENT(rxrpc_rtt_rx,
 		    __entry->avg = avg;
 			   ),
 
-	    TP_printk("c=%p %s sr=%08x rr=%08x rtt=%lld nr=%u avg=%lld",
+	    TP_printk("c=%08x %s sr=%08x rr=%08x rtt=%lld nr=%u avg=%lld",
 		      __entry->call,
 		      __print_symbolic(__entry->why, rxrpc_rtt_rx_traces),
 		      __entry->send_serial,
@@ -970,7 +973,7 @@ TRACE_EVENT(rxrpc_timer,
 	    TP_ARGS(call, why, now),
 
 	    TP_STRUCT__entry(
-		    __field(struct rxrpc_call *,		call		)
+		    __field(unsigned int,			call		)
 		    __field(enum rxrpc_timer_trace,		why		)
 		    __field(long,				now		)
 		    __field(long,				ack_at		)
@@ -984,7 +987,7 @@ TRACE_EVENT(rxrpc_timer,
 			     ),
 
 	    TP_fast_assign(
-		    __entry->call		= call;
+		    __entry->call		= call->debug_id;
 		    __entry->why		= why;
 		    __entry->now		= now;
 		    __entry->ack_at		= call->ack_at;
@@ -996,7 +999,7 @@ TRACE_EVENT(rxrpc_timer,
 		    __entry->timer		= call->timer.expires;
 			   ),
 
-	    TP_printk("c=%p %s a=%ld la=%ld r=%ld xr=%ld xq=%ld xt=%ld t=%ld",
+	    TP_printk("c=%08x %s a=%ld la=%ld r=%ld xr=%ld xq=%ld xt=%ld t=%ld",
 		      __entry->call,
 		      __print_symbolic(__entry->why, rxrpc_timer_traces),
 		      __entry->ack_at - __entry->now,
@@ -1039,7 +1042,7 @@ TRACE_EVENT(rxrpc_propose_ack,
 		    outcome),
 
 	    TP_STRUCT__entry(
-		    __field(struct rxrpc_call *,		call		)
+		    __field(unsigned int,			call		)
 		    __field(enum rxrpc_propose_ack_trace,	why		)
 		    __field(rxrpc_serial_t,			serial		)
 		    __field(u8,					ack_reason	)
@@ -1049,7 +1052,7 @@ TRACE_EVENT(rxrpc_propose_ack,
 			     ),
 
 	    TP_fast_assign(
-		    __entry->call	= call;
+		    __entry->call	= call->debug_id;
 		    __entry->why	= why;
 		    __entry->serial	= serial;
 		    __entry->ack_reason	= ack_reason;
@@ -1058,7 +1061,7 @@ TRACE_EVENT(rxrpc_propose_ack,
 		    __entry->outcome	= outcome;
 			   ),
 
-	    TP_printk("c=%p %s %s r=%08x i=%u b=%u%s",
+	    TP_printk("c=%08x %s %s r=%08x i=%u b=%u%s",
 		      __entry->call,
 		      __print_symbolic(__entry->why, rxrpc_propose_ack_traces),
 		      __print_symbolic(__entry->ack_reason, rxrpc_ack_names),
@@ -1075,20 +1078,20 @@ TRACE_EVENT(rxrpc_retransmit,
 	    TP_ARGS(call, seq, annotation, expiry),
 
 	    TP_STRUCT__entry(
-		    __field(struct rxrpc_call *,	call		)
+		    __field(unsigned int,		call		)
 		    __field(rxrpc_seq_t,		seq		)
 		    __field(u8,				annotation	)
 		    __field(s64,			expiry		)
 			     ),
 
 	    TP_fast_assign(
-		    __entry->call = call;
+		    __entry->call = call->debug_id;
 		    __entry->seq = seq;
 		    __entry->annotation = annotation;
 		    __entry->expiry = expiry;
 			   ),
 
-	    TP_printk("c=%p q=%x a=%02x xp=%lld",
+	    TP_printk("c=%08x q=%x a=%02x xp=%lld",
 		      __entry->call,
 		      __entry->seq,
 		      __entry->annotation,
@@ -1102,7 +1105,7 @@ TRACE_EVENT(rxrpc_congest,
 	    TP_ARGS(call, summary, ack_serial, change),
 
 	    TP_STRUCT__entry(
-		    __field(struct rxrpc_call *,		call		)
+		    __field(unsigned int,			call		)
 		    __field(enum rxrpc_congest_change,		change		)
 		    __field(rxrpc_seq_t,			hard_ack	)
 		    __field(rxrpc_seq_t,			top		)
@@ -1112,7 +1115,7 @@ TRACE_EVENT(rxrpc_congest,
 			     ),
 
 	    TP_fast_assign(
-		    __entry->call	= call;
+		    __entry->call	= call->debug_id;
 		    __entry->change	= change;
 		    __entry->hard_ack	= call->tx_hard_ack;
 		    __entry->top	= call->tx_top;
@@ -1121,7 +1124,7 @@ TRACE_EVENT(rxrpc_congest,
 		    memcpy(&__entry->sum, summary, sizeof(__entry->sum));
 			   ),
 
-	    TP_printk("c=%p r=%08x %s q=%08x %s cw=%u ss=%u nr=%u,%u nw=%u,%u r=%u b=%u u=%u d=%u l=%x%s%s%s",
+	    TP_printk("c=%08x r=%08x %s q=%08x %s cw=%u ss=%u nr=%u,%u nw=%u,%u r=%u b=%u u=%u d=%u l=%x%s%s%s",
 		      __entry->call,
 		      __entry->ack_serial,
 		      __print_symbolic(__entry->sum.ack_reason, rxrpc_ack_names),
@@ -1146,16 +1149,16 @@ TRACE_EVENT(rxrpc_disconnect_call,
 	    TP_ARGS(call),
 
 	    TP_STRUCT__entry(
-		    __field(struct rxrpc_call *,	call		)
+		    __field(unsigned int,		call		)
 		    __field(u32,			abort_code	)
 			     ),
 
 	    TP_fast_assign(
-		    __entry->call = call;
+		    __entry->call = call->debug_id;
 		    __entry->abort_code = call->abort_code;
 			   ),
 
-	    TP_printk("c=%p ab=%08x",
+	    TP_printk("c=%08x ab=%08x",
 		      __entry->call,
 		      __entry->abort_code)
 	    );
@@ -1166,16 +1169,16 @@ TRACE_EVENT(rxrpc_improper_term,
 	    TP_ARGS(call),
 
 	    TP_STRUCT__entry(
-		    __field(struct rxrpc_call *,	call		)
+		    __field(unsigned int,		call		)
 		    __field(u32,			abort_code	)
 			     ),
 
 	    TP_fast_assign(
-		    __entry->call = call;
+		    __entry->call = call->debug_id;
 		    __entry->abort_code = call->abort_code;
 			   ),
 
-	    TP_printk("c=%p ab=%08x",
+	    TP_printk("c=%08x ab=%08x",
 		      __entry->call,
 		      __entry->abort_code)
 	    );
@@ -1187,18 +1190,18 @@ TRACE_EVENT(rxrpc_rx_eproto,
 	    TP_ARGS(call, serial, why),
 
 	    TP_STRUCT__entry(
-		    __field(struct rxrpc_call *,	call		)
+		    __field(unsigned int,		call		)
 		    __field(rxrpc_serial_t,		serial		)
 		    __field(const char *,		why		)
 			     ),
 
 	    TP_fast_assign(
-		    __entry->call = call;
+		    __entry->call = call->debug_id;
 		    __entry->serial = serial;
 		    __entry->why = why;
 			   ),
 
-	    TP_printk("c=%p EPROTO %08x %s",
+	    TP_printk("c=%08x EPROTO %08x %s",
 		      __entry->call,
 		      __entry->serial,
 		      __entry->why)
@@ -1210,20 +1213,20 @@ TRACE_EVENT(rxrpc_connect_call,
 	    TP_ARGS(call),
 
 	    TP_STRUCT__entry(
-		    __field(struct rxrpc_call *,	call		)
+		    __field(unsigned int,		call		)
 		    __field(unsigned long,		user_call_ID	)
 		    __field(u32,			cid		)
 		    __field(u32,			call_id		)
 			     ),
 
 	    TP_fast_assign(
-		    __entry->call = call;
+		    __entry->call = call->debug_id;
 		    __entry->user_call_ID = call->user_call_ID;
 		    __entry->cid = call->cid;
 		    __entry->call_id = call->call_id;
 			   ),
 
-	    TP_printk("c=%p u=%p %08x:%08x",
+	    TP_printk("c=%08x u=%p %08x:%08x",
 		      __entry->call,
 		      (void *)__entry->user_call_ID,
 		      __entry->cid,
@@ -1236,18 +1239,18 @@ TRACE_EVENT(rxrpc_resend,
 	    TP_ARGS(call, ix),
 
 	    TP_STRUCT__entry(
-		    __field(struct rxrpc_call *,	call		)
+		    __field(unsigned int,		call		)
 		    __field(int,			ix		)
 		    __array(u8,				anno, 64	)
 			     ),
 
 	    TP_fast_assign(
-		    __entry->call = call;
+		    __entry->call = call->debug_id;
 		    __entry->ix = ix;
 		    memcpy(__entry->anno, call->rxtx_annotations, 64);
 			   ),
 
-	    TP_printk("c=%p ix=%u a=%64phN",
+	    TP_printk("c=%08x ix=%u a=%64phN",
 		      __entry->call,
 		      __entry->ix,
 		      __entry->anno)
diff --git a/net/rxrpc/af_rxrpc.c b/net/rxrpc/af_rxrpc.c
index 9e1c2c6b6a67..ec5ec68be1aa 100644
--- a/net/rxrpc/af_rxrpc.c
+++ b/net/rxrpc/af_rxrpc.c
@@ -40,6 +40,7 @@ static const struct proto_ops rxrpc_rpc_ops;
 
 /* current debugging ID */
 atomic_t rxrpc_debug_id;
+EXPORT_SYMBOL(rxrpc_debug_id);
 
 /* count of skbs currently in use */
 atomic_t rxrpc_n_tx_skbs, rxrpc_n_rx_skbs;
@@ -267,6 +268,7 @@ static int rxrpc_listen(struct socket *sock, int backlog)
  * @gfp: The allocation constraints
  * @notify_rx: Where to send notifications inste