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linux/include/trace/events/fscache.h
David Howells 20ec197bfa fscache: Use refcount_t for the cookie refcount instead of atomic_t 
Use refcount_t for the fscache_cookie refcount instead of atomic_t and
rename the 'usage' member to 'ref' in such cases.  The tracepoints that
reference it change from showing "u=%d" to "r=%d".

Signed-off-by: David Howells <dhowells@redhat.com>
Reviewed-by: Jeff Layton <jlayton@redhat.com>
cc: linux-cachefs@redhat.com
Link: https://lore.kernel.org/r/162431204358.2908479.8006938388213098079.stgit@warthog.procyon.org.uk/
2021-08-27 13:34:03 +01:00

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/* SPDX-License-Identifier: GPL-2.0-or-later */
/* FS-Cache tracepoints
*
* Copyright (C) 2016 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_cookie_trace {
fscache_cookie_collision,
fscache_cookie_discard,
fscache_cookie_get_acquire_parent,
fscache_cookie_get_attach_object,
fscache_cookie_get_reacquire,
fscache_cookie_get_register_netfs,
fscache_cookie_put_acquire_nobufs,
fscache_cookie_put_dup_netfs,
fscache_cookie_put_relinquish,
fscache_cookie_put_object,
fscache_cookie_put_parent,
};
enum fscache_page_trace {
fscache_page_cached,
fscache_page_inval,
fscache_page_maybe_release,
fscache_page_radix_clear_store,
fscache_page_radix_delete,
fscache_page_radix_insert,
fscache_page_radix_pend2store,
fscache_page_radix_set_pend,
fscache_page_uncache,
fscache_page_write,
fscache_page_write_end,
fscache_page_write_end_pend,
fscache_page_write_end_noc,
fscache_page_write_wait,
fscache_page_trace__nr
};
enum fscache_op_trace {
fscache_op_cancel,
fscache_op_cancel_all,
fscache_op_cancelled,
fscache_op_completed,
fscache_op_enqueue_async,
fscache_op_enqueue_mythread,
fscache_op_gc,
fscache_op_init,
fscache_op_put,
fscache_op_run,
fscache_op_signal,
fscache_op_submit,
fscache_op_submit_ex,
fscache_op_work,
fscache_op_trace__nr
};
enum fscache_page_op_trace {
fscache_page_op_alloc_one,
fscache_page_op_attr_changed,
fscache_page_op_check_consistency,
fscache_page_op_invalidate,
fscache_page_op_retr_multi,
fscache_page_op_retr_one,
fscache_page_op_write_one,
fscache_page_op_trace__nr
};
#endif
/*
* Declare tracing information enums and their string mappings for display.
*/
#define fscache_cookie_traces \
EM(fscache_cookie_collision, "*COLLISION*") \
EM(fscache_cookie_discard, "DISCARD") \
EM(fscache_cookie_get_acquire_parent, "GET prn") \
EM(fscache_cookie_get_attach_object, "GET obj") \
EM(fscache_cookie_get_reacquire, "GET raq") \
EM(fscache_cookie_get_register_netfs, "GET net") \
EM(fscache_cookie_put_acquire_nobufs, "PUT nbf") \
EM(fscache_cookie_put_dup_netfs, "PUT dnt") \
EM(fscache_cookie_put_relinquish, "PUT rlq") \
EM(fscache_cookie_put_object, "PUT obj") \
E_(fscache_cookie_put_parent, "PUT prn")
#define fscache_page_traces \
EM(fscache_page_cached, "Cached ") \
EM(fscache_page_inval, "InvalPg") \
EM(fscache_page_maybe_release, "MayRels") \
EM(fscache_page_uncache, "Uncache") \
EM(fscache_page_radix_clear_store, "RxCStr ") \
EM(fscache_page_radix_delete, "RxDel ") \
EM(fscache_page_radix_insert, "RxIns ") \
EM(fscache_page_radix_pend2store, "RxP2S ") \
EM(fscache_page_radix_set_pend, "RxSPend ") \
EM(fscache_page_write, "WritePg") \
EM(fscache_page_write_end, "EndPgWr") \
EM(fscache_page_write_end_pend, "EndPgWP") \
EM(fscache_page_write_end_noc, "EndPgNC") \
E_(fscache_page_write_wait, "WtOnWrt")
#define fscache_op_traces \
EM(fscache_op_cancel, "Cancel1") \
EM(fscache_op_cancel_all, "CancelA") \
EM(fscache_op_cancelled, "Canclld") \
EM(fscache_op_completed, "Complet") \
EM(fscache_op_enqueue_async, "EnqAsyn") \
EM(fscache_op_enqueue_mythread, "EnqMyTh") \
EM(fscache_op_gc, "GC ") \
EM(fscache_op_init, "Init ") \
EM(fscache_op_put, "Put ") \
EM(fscache_op_run, "Run ") \
EM(fscache_op_signal, "Signal ") \
EM(fscache_op_submit, "Submit ") \
EM(fscache_op_submit_ex, "SubmitX") \
E_(fscache_op_work, "Work ")
#define fscache_page_op_traces \
EM(fscache_page_op_alloc_one, "Alloc1 ") \
EM(fscache_page_op_attr_changed, "AttrChg") \
EM(fscache_page_op_check_consistency, "CheckCn") \
EM(fscache_page_op_invalidate, "Inval ") \
EM(fscache_page_op_retr_multi, "RetrMul") \
EM(fscache_page_op_retr_one, "Retr1 ") \
E_(fscache_page_op_write_one, "Write1 ")
/*
* 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(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(enum fscache_cookie_trace, where )
__field(int, ref )
),
TP_fast_assign(
__entry->cookie = cookie_debug_id;
__entry->where = where;
__entry->ref = ref;
),
TP_printk("%s c=%08x r=%d",
__print_symbolic(__entry->where, fscache_cookie_traces),
__entry->cookie, __entry->ref)
);
TRACE_EVENT(fscache_netfs,
TP_PROTO(struct fscache_netfs *netfs),
TP_ARGS(netfs),
TP_STRUCT__entry(
__field(unsigned int, cookie )
__array(char, name, 8 )
),
TP_fast_assign(
__entry->cookie = netfs->primary_index->debug_id;
strncpy(__entry->name, netfs->name, 8);
__entry->name[7] = 0;
),
TP_printk("c=%08x n=%s",
__entry->cookie, __entry->name)
);
TRACE_EVENT(fscache_acquire,
TP_PROTO(struct fscache_cookie *cookie),
TP_ARGS(cookie),
TP_STRUCT__entry(
__field(unsigned int, cookie )
__field(unsigned int, parent )
__array(char, name, 8 )
__field(int, p_ref )
__field(int, p_n_children )
__field(u8, p_flags )
),
TP_fast_assign(
__entry->cookie = cookie->debug_id;
__entry->parent = cookie->parent->debug_id;
__entry->p_ref = refcount_read(&cookie->parent->ref);
__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=%08x p=%08x pr=%d pc=%d pf=%02x n=%s",
__entry->cookie, __entry->parent, __entry->p_ref,
__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(unsigned int, cookie )
__field(unsigned int, parent )
__field(int, ref )
__field(int, n_children )
__field(int, n_active )
__field(u8, flags )
__field(bool, retire )
),
TP_fast_assign(
__entry->cookie = cookie->debug_id;
__entry->parent = cookie->parent->debug_id;
__entry->ref = refcount_read(&cookie->ref);
__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=%08x r=%d p=%08x Nc=%d Na=%d f=%02x r=%u",
__entry->cookie, __entry->ref,
__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(unsigned int, cookie )
__field(int, ref )
__field(int, n_children )
__field(int, n_active )
__field(u8, flags )
),
TP_fast_assign(
__entry->cookie = cookie->debug_id;
__entry->ref = refcount_read(&cookie->ref);
__entry->n_children = atomic_read(&cookie->n_children);
__entry->n_active = atomic_read(&cookie->n_active);
__entry->flags = cookie->flags;
),
TP_printk("c=%08x r=%d Nc=%d Na=%d f=%02x",
__entry->cookie, __entry->ref,
__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(unsigned int, cookie )
__field(int, ref )
__field(int, n_children )
__field(int, n_active )
__field(u8, flags )
),
TP_fast_assign(
__entry->cookie = cookie->debug_id;
__entry->ref = refcount_read(&cookie->ref);
__entry->n_children = atomic_read(&cookie->n_children);
__entry->n_active = atomic_read(&cookie->n_active);
__entry->flags = cookie->flags;
),
TP_printk("c=%08x r=%d Nc=%d Na=%d f=%02x",
__entry->cookie, __entry->ref,
__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(unsigned int, cookie )
__field(unsigned int, object )
__array(char, state, 8 )
__field(bool, wait )
__field(bool, oob )
__field(s8, event_num )
),
TP_fast_assign(
__entry->cookie = object->cookie->debug_id;
__entry->object = object->debug_id;
__entry->wait = wait;
__entry->oob = oob;
__entry->event_num = event_num;
memcpy(__entry->state, state->short_name, 8);
),
TP_printk("c=%08x o=%08d %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)
);
TRACE_EVENT(fscache_page,
TP_PROTO(struct fscache_cookie *cookie, struct page *page,
enum fscache_page_trace why),
TP_ARGS(cookie, page, why),
TP_STRUCT__entry(
__field(unsigned int, cookie )
__field(pgoff_t, page )
__field(enum fscache_page_trace, why )
),
TP_fast_assign(
__entry->cookie = cookie->debug_id;
__entry->page = page->index;
__entry->why = why;
),
TP_printk("c=%08x %s pg=%lx",
__entry->cookie,
__print_symbolic(__entry->why, fscache_page_traces),
__entry->page)
);
TRACE_EVENT(fscache_check_page,
TP_PROTO(struct fscache_cookie *cookie, struct page *page,
void *val, int n),
TP_ARGS(cookie, page, val, n),
TP_STRUCT__entry(
__field(unsigned int, cookie )
__field(void *, page )
__field(void *, val )
__field(int, n )
),
TP_fast_assign(
__entry->cookie = cookie->debug_id;
__entry->page = page;
__entry->val = val;
__entry->n = n;
),
TP_printk("c=%08x pg=%p val=%p n=%d",
__entry->cookie, __entry->page, __entry->val, __entry->n)
);
TRACE_EVENT(fscache_wake_cookie,
TP_PROTO(struct fscache_cookie *cookie),
TP_ARGS(cookie),
TP_STRUCT__entry(
__field(unsigned int, cookie )
),
TP_fast_assign(
__entry->cookie = cookie->debug_id;
),
TP_printk("c=%08x", __entry->cookie)
);
TRACE_EVENT(fscache_op,
TP_PROTO(struct fscache_cookie *cookie, struct fscache_operation *op,
enum fscache_op_trace why),
TP_ARGS(cookie, op, why),
TP_STRUCT__entry(
__field(unsigned int, cookie )
__field(unsigned int, op )
__field(enum fscache_op_trace, why )
),
TP_fast_assign(
__entry->cookie = cookie ? cookie->debug_id : 0;
__entry->op = op->debug_id;
__entry->why = why;
),
TP_printk("c=%08x op=%08x %s",
__entry->cookie, __entry->op,
__print_symbolic(__entry->why, fscache_op_traces))
);
TRACE_EVENT(fscache_page_op,
TP_PROTO(struct fscache_cookie *cookie, struct page *page,
struct fscache_operation *op, enum fscache_page_op_trace what),
TP_ARGS(cookie, page, op, what),
TP_STRUCT__entry(
__field(unsigned int, cookie )
__field(unsigned int, op )
__field(pgoff_t, page )
__field(enum fscache_page_op_trace, what )
),
TP_fast_assign(
__entry->cookie = cookie->debug_id;
__entry->page = page ? page->index : 0;
__entry->op = op->debug_id;
__entry->what = what;
),
TP_printk("c=%08x %s pg=%lx op=%08x",
__entry->cookie,
__print_symbolic(__entry->what, fscache_page_op_traces),
__entry->page, __entry->op)
);
TRACE_EVENT(fscache_wrote_page,
TP_PROTO(struct fscache_cookie *cookie, struct page *page,
struct fscache_operation *op, int ret),
TP_ARGS(cookie, page, op, ret),
TP_STRUCT__entry(
__field(unsigned int, cookie )
__field(unsigned int, op )
__field(pgoff_t, page )
__field(int, ret )
),
TP_fast_assign(
__entry->cookie = cookie->debug_id;
__entry->page = page->index;
__entry->op = op->debug_id;
__entry->ret = ret;
),
TP_printk("c=%08x pg=%lx op=%08x ret=%d",
__entry->cookie, __entry->page, __entry->op, __entry->ret)
);
TRACE_EVENT(fscache_gang_lookup,
TP_PROTO(struct fscache_cookie *cookie, struct fscache_operation *op,
void **results, int n, pgoff_t store_limit),
TP_ARGS(cookie, op, results, n, store_limit),
TP_STRUCT__entry(
__field(unsigned int, cookie )
__field(unsigned int, op )
__field(pgoff_t, results0 )
__field(int, n )
__field(pgoff_t, store_limit )
),
TP_fast_assign(
__entry->cookie = cookie->debug_id;
__entry->op = op->debug_id;
__entry->results0 = results[0] ? ((struct page *)results[0])->index : (pgoff_t)-1;
__entry->n = n;
__entry->store_limit = store_limit;
),
TP_printk("c=%08x op=%08x r0=%lx n=%d sl=%lx",
__entry->cookie, __entry->op, __entry->results0, __entry->n,
__entry->store_limit)
);
#endif /* _TRACE_FSCACHE_H */
/* This part must be outside protection */
#include <trace/define_trace.h>
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