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afs: Add some tracepoints

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Add three tracepoints to the AFS filesystem:

 (1) The afs_recv_data tracepoint logs data segments that are extracted
     from the data received from the peer through afs_extract_data().

 (2) The afs_notify_call tracepoint logs notification from AF_RXRPC of data
     coming in to an asynchronous call.

 (3) The afs_cb_call tracepoint logs incoming calls that have had their
     operation ID extracted and mapped into a supported cache manager
     service call.

To make (3) work, the name strings in the afs_call_type struct objects have
to be annotated with __tracepoint_string.  This is done with the CM_NAME()
macro.

Further, the AFS call state enum needs a name so that it can be used to
declare parameter types.

Signed-off-by: David Howells <dhowells@redhat.com>
This commit is contained in:
David Howells
2017-01-05 10:38:34 +00:00
parent 4289e60cb0
commit 8e8d7f13b6
5 changed files with 144 additions and 15 deletions
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109
include/trace/events/afs.h Normal file
View File

@@ -0,0 +1,109 @@
/* AFS tracepoints
*
* Copyright (C) 2016 Red Hat, Inc. All Rights Reserved.
* Written by David Howells (dhowells@redhat.com)
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public Licence
* as published by the Free Software Foundation; either version
* 2 of the Licence, or (at your option) any later version.
*/
#undef TRACE_SYSTEM
#define TRACE_SYSTEM afs
#if !defined(_TRACE_AFS_H) || defined(TRACE_HEADER_MULTI_READ)
#define _TRACE_AFS_H
#include <linux/tracepoint.h>
TRACE_EVENT(afs_recv_data,
TP_PROTO(struct afs_call *call, unsigned count, unsigned offset,
bool want_more, int ret),
TP_ARGS(call, count, offset, want_more, ret),
TP_STRUCT__entry(
__field(struct rxrpc_call *, rxcall )
__field(struct afs_call *, call )
__field(enum afs_call_state, state )
__field(unsigned int, count )
__field(unsigned int, offset )
__field(unsigned short, unmarshall )
__field(bool, want_more )
__field(int, ret )
),
TP_fast_assign(
__entry->rxcall = call->rxcall;
__entry->call = call;
__entry->state = call->state;
__entry->unmarshall = call->unmarshall;
__entry->count = count;
__entry->offset = offset;
__entry->want_more = want_more;
__entry->ret = ret;
),
TP_printk("c=%p ac=%p s=%u u=%u %u/%u wm=%u ret=%d",
__entry->rxcall,
__entry->call,
__entry->state, __entry->unmarshall,
__entry->offset, __entry->count,
__entry->want_more, __entry->ret)
);
TRACE_EVENT(afs_notify_call,
TP_PROTO(struct rxrpc_call *rxcall, struct afs_call *call),
TP_ARGS(rxcall, call),
TP_STRUCT__entry(
__field(struct rxrpc_call *, rxcall )
__field(struct afs_call *, call )
__field(enum afs_call_state, state )
__field(unsigned short, unmarshall )
),
TP_fast_assign(
__entry->rxcall = rxcall;
__entry->call = call;
__entry->state = call->state;
__entry->unmarshall = call->unmarshall;
),
TP_printk("c=%p ac=%p s=%u u=%u",
__entry->rxcall,
__entry->call,
__entry->state, __entry->unmarshall)
);
TRACE_EVENT(afs_cb_call,
TP_PROTO(struct afs_call *call),
TP_ARGS(call),
TP_STRUCT__entry(
__field(struct rxrpc_call *, rxcall )
__field(struct afs_call *, call )
__field(const char *, name )
__field(u32, op )
),
TP_fast_assign(
__entry->rxcall = call->rxcall;
__entry->call = call;
__entry->name = call->type->name;
__entry->op = call->operation_ID;
),
TP_printk("c=%p ac=%p %s o=%u",
__entry->rxcall,
__entry->call,
__entry->name,
__entry->op)
);
#endif /* _TRACE_AFS_H */
/* This part must be outside protection */
#include <trace/define_trace.h>