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/* SPDX-License-Identifier: GPL-2.0-or-later */
/* FS-Cache tracepoints
*
* Copyright (C) 2021 Red Hat, Inc. All Rights Reserved.
* Written by David Howells (dhowells@redhat.com)
*/
#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_cache_trace {
fscache_cache_collision,
fscache_cache_get_acquire,
fscache_cache_new_acquire,
fscache_cache_put_alloc_volume,
fscache_cache_put_cache,
fscache_cache_put_prep_failed,
fscache_cache_put_relinquish,
fscache_cache_put_volume,
};
enum fscache_volume_trace {
fscache_volume_collision,
fscache_volume_get_cookie,
fscache_volume_get_create_work,
fscache_volume_get_hash_collision,
fscache_volume_free,
fscache_volume_new_acquire,
fscache_volume_put_cookie,
fscache_volume_put_create_work,
fscache_volume_put_hash_collision,
fscache_volume_put_relinquish,
fscache_volume_see_create_work,
fscache_volume_see_hash_wake,
};
enum fscache_cookie_trace {
fscache_cookie_collision,
fscache_cookie_discard,
fscache_cookie_get_end_access,
fscache_cookie_get_hash_collision,
fscache_cookie_new_acquire,
fscache_cookie_put_hash_collision,
fscache_cookie_put_over_queued,
fscache_cookie_put_relinquish,
fscache_cookie_put_withdrawn,
fscache_cookie_put_work,
fscache_cookie_see_active,
fscache_cookie_see_relinquish,
fscache_cookie_see_withdraw,
fscache_cookie_see_work,
};
#endif
/*
* Declare tracing information enums and their string mappings for display.
*/
#define fscache_cache_traces \
EM(fscache_cache_collision, "*COLLIDE*") \
EM(fscache_cache_get_acquire, "GET acq ") \
EM(fscache_cache_new_acquire, "NEW acq ") \
EM(fscache_cache_put_alloc_volume, "PUT alvol") \
EM(fscache_cache_put_cache, "PUT cache") \
EM(fscache_cache_put_prep_failed, "PUT pfail") \
EM(fscache_cache_put_relinquish, "PUT relnq") \
E_(fscache_cache_put_volume, "PUT vol ")
#define fscache_volume_traces \
EM(fscache_volume_collision, "*COLLIDE*") \
EM(fscache_volume_get_cookie, "GET cook ") \
EM(fscache_volume_get_create_work, "GET creat") \
EM(fscache_volume_get_hash_collision, "GET hcoll") \
EM(fscache_volume_free, "FREE ") \
EM(fscache_volume_new_acquire, "NEW acq ") \
EM(fscache_volume_put_cookie, "PUT cook ") \
EM(fscache_volume_put_create_work, "PUT creat") \
EM(fscache_volume_put_hash_collision, "PUT hcoll") \
EM(fscache_volume_put_relinquish, "PUT relnq") \
EM(fscache_volume_see_create_work, "SEE creat") \
E_(fscache_volume_see_hash_wake, "SEE hwake")
#define fscache_cookie_traces \
EM(fscache_cookie_collision, "*COLLIDE*") \
EM(fscache_cookie_discard, "DISCARD ") \
EM(fscache_cookie_get_hash_collision, "GET hcoll") \
EM(fscache_cookie_get_end_access, "GQ endac") \
EM(fscache_cookie_new_acquire, "NEW acq ") \
EM(fscache_cookie_put_hash_collision, "PUT hcoll") \
EM(fscache_cookie_put_over_queued, "PQ overq") \
EM(fscache_cookie_put_relinquish, "PUT relnq") \
EM(fscache_cookie_put_withdrawn, "PUT wthdn") \
EM(fscache_cookie_put_work, "PQ work ") \
EM(fscache_cookie_see_active, "- activ") \
EM(fscache_cookie_see_relinquish, "- x-rlq") \
EM(fscache_cookie_see_withdraw, "- x-wth") \
E_(fscache_cookie_see_work, "- work ")
/*
* 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_cache_traces;
fscache_volume_traces;
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_cache,
TP_PROTO(unsigned int cache_debug_id,
int usage,
enum fscache_cache_trace where),
TP_ARGS(cache_debug_id, usage, where),
TP_STRUCT__entry(
__field(unsigned int, cache )
__field(int, usage )
__field(enum fscache_cache_trace, where )
),
TP_fast_assign(
__entry->cache = cache_debug_id;
__entry->usage = usage;
__entry->where = where;
),
TP_printk("C=%08x %s r=%d",
__entry->cache,
__print_symbolic(__entry->where, fscache_cache_traces),
__entry->usage)
);
TRACE_EVENT(fscache_volume,
TP_PROTO(unsigned int volume_debug_id,
int usage,
enum fscache_volume_trace where),
TP_ARGS(volume_debug_id, usage, where),
TP_STRUCT__entry(
__field(unsigned int, volume )
__field(int, usage )
__field(enum fscache_volume_trace, where )
),
TP_fast_assign(
__entry->volume = volume_debug_id;
__entry->usage = usage;
__entry->where = where;
),
TP_printk("V=%08x %s u=%d",
__entry->volume,
__print_symbolic(__entry->where, fscache_volume_traces),
__entry->usage)
);
TRACE_EVENT(fscache_cookie,
TP_PROTO(unsigned int cookie_debug_id,
int ref,
enum fscache_cookie_trace where),
TP_ARGS(cookie_debug_id, ref, where),
TP_STRUCT__entry(
__field(unsigned int, cookie )
__field(int, ref )
__field(enum fscache_cookie_trace, where )
),
TP_fast_assign(
__entry->cookie = cookie_debug_id;
__entry->ref = ref;
__entry->where = where;
),
TP_printk("c=%08x %s r=%d",
__entry->cookie,
__print_symbolic(__entry->where, fscache_cookie_traces),
__entry->ref)
);
TRACE_EVENT(fscache_acquire,
TP_PROTO(struct fscache_cookie *cookie),
TP_ARGS(cookie),
TP_STRUCT__entry(
__field(unsigned int, cookie )
__field(unsigned int, volume )
__field(int, v_ref )
__field(int, v_n_cookies )
),
TP_fast_assign(
__entry->cookie = cookie->debug_id;
__entry->volume = cookie->volume->debug_id;
__entry->v_ref = refcount_read(&cookie->volume->ref);
__entry->v_n_cookies = atomic_read(&cookie->volume->n_cookies);
),
TP_printk("c=%08x V=%08x vr=%d vc=%d",
__entry->cookie,
__entry->volume, __entry->v_ref, __entry->v_n_cookies)
);
TRACE_EVENT(fscache_relinquish,
TP_PROTO(struct fscache_cookie *cookie, bool retire),
TP_ARGS(cookie, retire),
TP_STRUCT__entry(
__field(unsigned int, cookie )
__field(unsigned int, volume )
__field(int, ref )
__field(int, n_active )
__field(u8, flags )
__field(bool, retire )
),
TP_fast_assign(
__entry->cookie = cookie->debug_id;
__entry->volume = cookie->volume->debug_id;
__entry->ref = refcount_read(&cookie->ref);
__entry->n_active = atomic_read(&cookie->n_active);
__entry->flags = cookie->flags;
__entry->retire = retire;
),
TP_printk("c=%08x V=%08x r=%d U=%d f=%02x rt=%u",
__entry->cookie, __entry->volume, __entry->ref,
__entry->n_active, __entry->flags, __entry->retire)
);
#endif /* _TRACE_FSCACHE_H */
/* This part must be outside protection */
#include <trace/define_trace.h>
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