2908f5e101
Add a cookie debug ID and use that in traces and in procfiles rather than displaying the (hashed) pointer to the cookie. This is easier to correlate and we don't lose anything when interpreting oops output since that shows unhashed addresses and registers that aren't comparable to the hashed values. Changes: ver #2: - Fix the fscache_op tracepoint to handle a NULL cookie pointer. 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/158861210988.340223.11688464116498247790.stgit@warthog.procyon.org.uk/ # rfc Link: https://lore.kernel.org/r/159465769844.1376105.14119502774019865432.stgit@warthog.procyon.org.uk/ Link: https://lore.kernel.org/r/160588459097.3465195.1273313637721852165.stgit@warthog.procyon.org.uk/ # rfc Link: https://lore.kernel.org/r/162431193544.2908479.17556704572948300790.stgit@warthog.procyon.org.uk/
322 lines
8.0 KiB
C
322 lines
8.0 KiB
C
/* SPDX-License-Identifier: GPL-2.0-or-later */
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/* 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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#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(unsigned int, obj )
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__field(unsigned int, 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->fscache.debug_id;
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__entry->cookie = cookie->debug_id;
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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=%08x o=%08x 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(unsigned int, 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->fscache.debug_id;
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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=%08x 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(unsigned int, 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->fscache.debug_id;
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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=%08x 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(unsigned int, 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->fscache.debug_id;
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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=%08x 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(unsigned int, 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->fscache.debug_id;
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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=%08x 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(unsigned int, 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->fscache.debug_id;
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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=%08x 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(unsigned int, 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->fscache.debug_id;
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__entry->de = de;
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),
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TP_printk("o=%08x 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(unsigned int, obj )
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__field(unsigned int, xobj )
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__field(struct dentry *, de )
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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->fscache.debug_id;
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__entry->de = de;
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__entry->xobj = xobj->fscache.debug_id;
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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=%08x d=%p wo=%08x 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(unsigned int, 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->fscache.debug_id;
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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=%08x 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(unsigned int, 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->fscache.debug_id;
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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=%08x 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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