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linux/include/trace/events/fscache.h

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fscache: Add tracepoints Add some tracepoints to fscache: (*) fscache_cookie - Tracks a cookie's usage count. (*) fscache_netfs - Logs registration of a network filesystem, including the pointer to the cookie allocated. (*) fscache_acquire - Logs cookie acquisition. (*) fscache_relinquish - Logs cookie relinquishment. (*) fscache_enable - Logs enablement of a cookie. (*) fscache_disable - Logs disablement of a cookie. (*) fscache_osm - Tracks execution of states in the object state machine. and cachefiles: (*) cachefiles_ref - Tracks a cachefiles object's usage count. (*) cachefiles_lookup - Logs result of lookup_one_len(). (*) cachefiles_mkdir - Logs result of vfs_mkdir(). (*) cachefiles_create - Logs result of vfs_create(). (*) cachefiles_unlink - Logs calls to vfs_unlink(). (*) cachefiles_rename - Logs calls to vfs_rename(). (*) cachefiles_mark_active - Logs an object becoming active. (*) cachefiles_wait_active - Logs a wait for an old object to be destroyed. (*) cachefiles_mark_inactive - Logs an object becoming inactive. (*) cachefiles_mark_buried - Logs the burial of an object. Signed-off-by: David Howells <dhowells@redhat.com>
2018-04-04 20:41:27 +08:00
/* FS-Cache 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 fscache
#if !defined(_TRACE_FSCACHE_H) || defined(TRACE_HEADER_MULTI_READ)
#define _TRACE_FSCACHE_H
#include <linux/fscache.h>
#include <linux/tracepoint.h>
/*
* Define enums for tracing information.
*/
#ifndef __FSCACHE_DECLARE_TRACE_ENUMS_ONCE_ONLY
#define __FSCACHE_DECLARE_TRACE_ENUMS_ONCE_ONLY
enum fscache_cookie_trace {
fscache_cookie_get_acquire_parent,
fscache_cookie_get_attach_object,
fscache_cookie_get_register_netfs,
fscache_cookie_put_acquire_nobufs,
fscache_cookie_put_relinquish,
fscache_cookie_put_object,
fscache_cookie_put_parent,
};
#endif
/*
* Declare tracing information enums and their string mappings for display.
*/
#define fscache_cookie_traces \
EM(fscache_cookie_get_acquire_parent, "GET prn") \
EM(fscache_cookie_get_attach_object, "GET obj") \
EM(fscache_cookie_get_register_netfs, "GET net") \
EM(fscache_cookie_put_acquire_nobufs, "PUT nbf") \
EM(fscache_cookie_put_relinquish, "PUT rlq") \
EM(fscache_cookie_put_object, "PUT obj") \
E_(fscache_cookie_put_parent, "PUT prn")
/*
* Export enum symbols via userspace.
*/
#undef EM
#undef E_
#define EM(a, b) TRACE_DEFINE_ENUM(a);
#define E_(a, b) TRACE_DEFINE_ENUM(a);
fscache_cookie_traces;
/*
* Now redefine the EM() and E_() macros to map the enums to the strings that
* will be printed in the output.
*/
#undef EM
#undef E_
#define EM(a, b) { a, b },
#define E_(a, b) { a, b }
TRACE_EVENT(fscache_cookie,
TP_PROTO(struct fscache_cookie *cookie,
enum fscache_cookie_trace where,
int usage),
TP_ARGS(cookie, where, usage),
TP_STRUCT__entry(
__field(struct fscache_cookie *, cookie )
__field(struct fscache_cookie *, parent )
__field(enum fscache_cookie_trace, where )
__field(int, usage )
__field(int, n_children )
__field(int, n_active )
__field(u8, flags )
),
TP_fast_assign(
__entry->cookie = cookie;
__entry->parent = cookie->parent;
__entry->where = where;
__entry->usage = usage;
__entry->n_children = atomic_read(&cookie->n_children);
__entry->n_active = atomic_read(&cookie->n_active);
__entry->flags = cookie->flags;
),
TP_printk("%s c=%p u=%d p=%p Nc=%d Na=%d f=%02x",
__print_symbolic(__entry->where, fscache_cookie_traces),
__entry->cookie, __entry->usage,
__entry->parent, __entry->n_children, __entry->n_active,
__entry->flags)
);
TRACE_EVENT(fscache_netfs,
TP_PROTO(struct fscache_netfs *netfs),
TP_ARGS(netfs),
TP_STRUCT__entry(
__field(struct fscache_cookie *, cookie )
__array(char, name, 8 )
),
TP_fast_assign(
__entry->cookie = netfs->primary_index;
strncpy(__entry->name, netfs->name, 8);
__entry->name[7] = 0;
),
TP_printk("c=%p n=%s",
__entry->cookie, __entry->name)
);
TRACE_EVENT(fscache_acquire,
TP_PROTO(struct fscache_cookie *cookie),
TP_ARGS(cookie),
TP_STRUCT__entry(
__field(struct fscache_cookie *, cookie )
__field(struct fscache_cookie *, parent )
__array(char, name, 8 )
__field(int, p_usage )
__field(int, p_n_children )
__field(u8, p_flags )
),
TP_fast_assign(
__entry->cookie = cookie;
__entry->parent = cookie->parent;
__entry->p_usage = atomic_read(&cookie->parent->usage);
__entry->p_n_children = atomic_read(&cookie->parent->n_children);
__entry->p_flags = cookie->parent->flags;
memcpy(__entry->name, cookie->def->name, 8);
__entry->name[7] = 0;
),
TP_printk("c=%p p=%p pu=%d pc=%d pf=%02x n=%s",
__entry->cookie, __entry->parent, __entry->p_usage,
__entry->p_n_children, __entry->p_flags, __entry->name)
);
TRACE_EVENT(fscache_relinquish,
TP_PROTO(struct fscache_cookie *cookie, bool retire),
TP_ARGS(cookie, retire),
TP_STRUCT__entry(
__field(struct fscache_cookie *, cookie )
__field(struct fscache_cookie *, parent )
__field(int, usage )
__field(int, n_children )
__field(int, n_active )
__field(u8, flags )
__field(bool, retire )
),
TP_fast_assign(
__entry->cookie = cookie;
__entry->parent = cookie->parent;
__entry->usage = atomic_read(&cookie->usage);
__entry->n_children = atomic_read(&cookie->n_children);
__entry->n_active = atomic_read(&cookie->n_active);
__entry->flags = cookie->flags;
__entry->retire = retire;
),
TP_printk("c=%p u=%d p=%p Nc=%d Na=%d f=%02x r=%u",
__entry->cookie, __entry->usage,
__entry->parent, __entry->n_children, __entry->n_active,
__entry->flags, __entry->retire)
);
TRACE_EVENT(fscache_enable,
TP_PROTO(struct fscache_cookie *cookie),
TP_ARGS(cookie),
TP_STRUCT__entry(
__field(struct fscache_cookie *, cookie )
__field(int, usage )
__field(int, n_children )
__field(int, n_active )
__field(u8, flags )
),
TP_fast_assign(
__entry->cookie = cookie;
__entry->usage = atomic_read(&cookie->usage);
__entry->n_children = atomic_read(&cookie->n_children);
__entry->n_active = atomic_read(&cookie->n_active);
__entry->flags = cookie->flags;
),
TP_printk("c=%p u=%d Nc=%d Na=%d f=%02x",
__entry->cookie, __entry->usage,
__entry->n_children, __entry->n_active, __entry->flags)
);
TRACE_EVENT(fscache_disable,
TP_PROTO(struct fscache_cookie *cookie),
TP_ARGS(cookie),
TP_STRUCT__entry(
__field(struct fscache_cookie *, cookie )
__field(int, usage )
__field(int, n_children )
__field(int, n_active )
__field(u8, flags )
),
TP_fast_assign(
__entry->cookie = cookie;
__entry->usage = atomic_read(&cookie->usage);
__entry->n_children = atomic_read(&cookie->n_children);
__entry->n_active = atomic_read(&cookie->n_active);
__entry->flags = cookie->flags;
),
TP_printk("c=%p u=%d Nc=%d Na=%d f=%02x",
__entry->cookie, __entry->usage,
__entry->n_children, __entry->n_active, __entry->flags)
);
TRACE_EVENT(fscache_osm,
TP_PROTO(struct fscache_object *object,
const struct fscache_state *state,
bool wait, bool oob, s8 event_num),
TP_ARGS(object, state, wait, oob, event_num),
TP_STRUCT__entry(
__field(struct fscache_cookie *, cookie )
__field(struct fscache_object *, object )
__array(char, state, 8 )
__field(bool, wait )
__field(bool, oob )
__field(s8, event_num )
),
TP_fast_assign(
__entry->cookie = object->cookie;
__entry->object = object;
__entry->wait = wait;
__entry->oob = oob;
__entry->event_num = event_num;
memcpy(__entry->state, state->short_name, 8);
),
TP_printk("c=%p o=%p %s %s%sev=%d",
__entry->cookie,
__entry->object,
__entry->state,
__print_symbolic(__entry->wait,
{ true, "WAIT" },
{ false, "WORK" }),
__print_symbolic(__entry->oob,
{ true, " OOB " },
{ false, " " }),
__entry->event_num)
);
#endif /* _TRACE_FSCACHE_H */
/* This part must be outside protection */
#include <trace/define_trace.h>