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a18feb5576
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>
326 lines
8.2 KiB
C
326 lines
8.2 KiB
C
/* CacheFiles tracepoints
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*
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* Copyright (C) 2016 Red Hat, Inc. All Rights Reserved.
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* Written by David Howells (dhowells@redhat.com)
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public Licence
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* as published by the Free Software Foundation; either version
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* 2 of the Licence, or (at your option) any later version.
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*/
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#undef TRACE_SYSTEM
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#define TRACE_SYSTEM cachefiles
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#if !defined(_TRACE_CACHEFILES_H) || defined(TRACE_HEADER_MULTI_READ)
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#define _TRACE_CACHEFILES_H
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#include <linux/tracepoint.h>
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/*
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* Define enums for tracing information.
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*/
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#ifndef __CACHEFILES_DECLARE_TRACE_ENUMS_ONCE_ONLY
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#define __CACHEFILES_DECLARE_TRACE_ENUMS_ONCE_ONLY
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enum cachefiles_obj_ref_trace {
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cachefiles_obj_put_wait_retry = fscache_obj_ref__nr_traces,
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cachefiles_obj_put_wait_timeo,
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cachefiles_obj_ref__nr_traces
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};
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#endif
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/*
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* Define enum -> string mappings for display.
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*/
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#define cachefiles_obj_kill_traces \
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EM(FSCACHE_OBJECT_IS_STALE, "stale") \
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EM(FSCACHE_OBJECT_NO_SPACE, "no_space") \
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EM(FSCACHE_OBJECT_WAS_RETIRED, "was_retired") \
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E_(FSCACHE_OBJECT_WAS_CULLED, "was_culled")
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#define cachefiles_obj_ref_traces \
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EM(fscache_obj_get_add_to_deps, "GET add_to_deps") \
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EM(fscache_obj_get_queue, "GET queue") \
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EM(fscache_obj_put_alloc_fail, "PUT alloc_fail") \
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EM(fscache_obj_put_attach_fail, "PUT attach_fail") \
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EM(fscache_obj_put_drop_obj, "PUT drop_obj") \
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EM(fscache_obj_put_enq_dep, "PUT enq_dep") \
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EM(fscache_obj_put_queue, "PUT queue") \
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EM(fscache_obj_put_work, "PUT work") \
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EM(cachefiles_obj_put_wait_retry, "PUT wait_retry") \
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E_(cachefiles_obj_put_wait_timeo, "PUT wait_timeo")
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/*
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* Export enum symbols via userspace.
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*/
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#undef EM
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#undef E_
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#define EM(a, b) TRACE_DEFINE_ENUM(a);
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#define E_(a, b) TRACE_DEFINE_ENUM(a);
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cachefiles_obj_kill_traces;
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cachefiles_obj_ref_traces;
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/*
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* Now redefine the EM() and E_() macros to map the enums to the strings that
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* will be printed in the output.
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*/
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#undef EM
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#undef E_
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#define EM(a, b) { a, b },
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#define E_(a, b) { a, b }
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TRACE_EVENT(cachefiles_ref,
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TP_PROTO(struct cachefiles_object *obj,
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struct fscache_cookie *cookie,
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enum cachefiles_obj_ref_trace why,
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int usage),
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TP_ARGS(obj, cookie, why, usage),
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/* Note that obj may be NULL */
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TP_STRUCT__entry(
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__field(struct cachefiles_object *, obj )
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__field(struct fscache_cookie *, cookie )
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__field(enum cachefiles_obj_ref_trace, why )
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__field(int, usage )
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),
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TP_fast_assign(
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__entry->obj = obj;
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__entry->cookie = cookie;
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__entry->usage = usage;
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__entry->why = why;
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),
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TP_printk("c=%p o=%p u=%d %s",
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__entry->cookie, __entry->obj, __entry->usage,
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__print_symbolic(__entry->why, cachefiles_obj_ref_traces))
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);
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TRACE_EVENT(cachefiles_lookup,
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TP_PROTO(struct cachefiles_object *obj,
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struct dentry *de,
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struct inode *inode),
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TP_ARGS(obj, de, inode),
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TP_STRUCT__entry(
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__field(struct cachefiles_object *, obj )
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__field(struct dentry *, de )
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__field(struct inode *, inode )
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),
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TP_fast_assign(
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__entry->obj = obj;
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__entry->de = de;
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__entry->inode = inode;
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),
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TP_printk("o=%p d=%p i=%p",
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__entry->obj, __entry->de, __entry->inode)
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);
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TRACE_EVENT(cachefiles_mkdir,
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TP_PROTO(struct cachefiles_object *obj,
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struct dentry *de, int ret),
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TP_ARGS(obj, de, ret),
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TP_STRUCT__entry(
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__field(struct cachefiles_object *, obj )
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__field(struct dentry *, de )
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__field(int, ret )
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),
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TP_fast_assign(
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__entry->obj = obj;
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__entry->de = de;
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__entry->ret = ret;
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),
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TP_printk("o=%p d=%p r=%u",
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__entry->obj, __entry->de, __entry->ret)
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);
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TRACE_EVENT(cachefiles_create,
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TP_PROTO(struct cachefiles_object *obj,
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struct dentry *de, int ret),
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TP_ARGS(obj, de, ret),
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TP_STRUCT__entry(
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__field(struct cachefiles_object *, obj )
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__field(struct dentry *, de )
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__field(int, ret )
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),
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TP_fast_assign(
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__entry->obj = obj;
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__entry->de = de;
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__entry->ret = ret;
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),
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TP_printk("o=%p d=%p r=%u",
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__entry->obj, __entry->de, __entry->ret)
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);
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TRACE_EVENT(cachefiles_unlink,
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TP_PROTO(struct cachefiles_object *obj,
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struct dentry *de,
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enum fscache_why_object_killed why),
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TP_ARGS(obj, de, why),
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/* Note that obj may be NULL */
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TP_STRUCT__entry(
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__field(struct cachefiles_object *, obj )
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__field(struct dentry *, de )
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__field(enum fscache_why_object_killed, why )
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),
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TP_fast_assign(
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__entry->obj = obj;
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__entry->de = de;
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__entry->why = why;
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),
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TP_printk("o=%p d=%p w=%s",
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__entry->obj, __entry->de,
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__print_symbolic(__entry->why, cachefiles_obj_kill_traces))
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);
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TRACE_EVENT(cachefiles_rename,
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TP_PROTO(struct cachefiles_object *obj,
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struct dentry *de,
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struct dentry *to,
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enum fscache_why_object_killed why),
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TP_ARGS(obj, de, to, why),
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/* Note that obj may be NULL */
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TP_STRUCT__entry(
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__field(struct cachefiles_object *, obj )
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__field(struct dentry *, de )
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__field(struct dentry *, to )
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__field(enum fscache_why_object_killed, why )
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),
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TP_fast_assign(
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__entry->obj = obj;
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__entry->de = de;
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__entry->to = to;
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__entry->why = why;
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),
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TP_printk("o=%p d=%p t=%p w=%s",
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__entry->obj, __entry->de, __entry->to,
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__print_symbolic(__entry->why, cachefiles_obj_kill_traces))
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);
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TRACE_EVENT(cachefiles_mark_active,
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TP_PROTO(struct cachefiles_object *obj,
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struct dentry *de),
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TP_ARGS(obj, de),
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/* Note that obj may be NULL */
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TP_STRUCT__entry(
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__field(struct cachefiles_object *, obj )
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__field(struct dentry *, de )
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),
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TP_fast_assign(
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__entry->obj = obj;
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__entry->de = de;
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),
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TP_printk("o=%p d=%p",
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__entry->obj, __entry->de)
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);
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TRACE_EVENT(cachefiles_wait_active,
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TP_PROTO(struct cachefiles_object *obj,
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struct dentry *de,
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struct cachefiles_object *xobj),
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TP_ARGS(obj, de, xobj),
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/* Note that obj may be NULL */
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TP_STRUCT__entry(
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__field(struct cachefiles_object *, obj )
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__field(struct dentry *, de )
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__field(struct cachefiles_object *, xobj )
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__field(u16, flags )
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__field(u16, fsc_flags )
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),
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TP_fast_assign(
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__entry->obj = obj;
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__entry->de = de;
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__entry->xobj = xobj;
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__entry->flags = xobj->flags;
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__entry->fsc_flags = xobj->fscache.flags;
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),
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TP_printk("o=%p d=%p wo=%p wf=%x wff=%x",
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__entry->obj, __entry->de, __entry->xobj,
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__entry->flags, __entry->fsc_flags)
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);
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TRACE_EVENT(cachefiles_mark_inactive,
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TP_PROTO(struct cachefiles_object *obj,
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struct dentry *de,
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struct inode *inode),
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TP_ARGS(obj, de, inode),
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/* Note that obj may be NULL */
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TP_STRUCT__entry(
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__field(struct cachefiles_object *, obj )
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__field(struct dentry *, de )
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__field(struct inode *, inode )
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),
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TP_fast_assign(
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__entry->obj = obj;
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__entry->de = de;
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__entry->inode = inode;
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),
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TP_printk("o=%p d=%p i=%p",
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__entry->obj, __entry->de, __entry->inode)
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);
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TRACE_EVENT(cachefiles_mark_buried,
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TP_PROTO(struct cachefiles_object *obj,
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struct dentry *de,
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enum fscache_why_object_killed why),
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TP_ARGS(obj, de, why),
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/* Note that obj may be NULL */
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TP_STRUCT__entry(
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__field(struct cachefiles_object *, obj )
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__field(struct dentry *, de )
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__field(enum fscache_why_object_killed, why )
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),
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TP_fast_assign(
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__entry->obj = obj;
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__entry->de = de;
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__entry->why = why;
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),
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TP_printk("o=%p d=%p w=%s",
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__entry->obj, __entry->de,
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__print_symbolic(__entry->why, cachefiles_obj_kill_traces))
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);
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#endif /* _TRACE_CACHEFILES_H */
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/* This part must be outside protection */
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#include <trace/define_trace.h>
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