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2c92ca849f
With the rework of how the __string() handles dynamic strings where it
saves off the source string in field in the helper structure[1], the
assignment of that value to the trace event field is stored in the helper
value and does not need to be passed in again.
This means that with:
__string(field, mystring)
Which use to be assigned with __assign_str(field, mystring), no longer
needs the second parameter and it is unused. With this, __assign_str()
will now only get a single parameter.
There's over 700 users of __assign_str() and because coccinelle does not
handle the TRACE_EVENT() macro I ended up using the following sed script:
git grep -l __assign_str | while read a ; do
sed -e 's/\(__assign_str([^,]*[^ ,]\) *,[^;]*/\1)/' $a > /tmp/test-file;
mv /tmp/test-file $a;
done
I then searched for __assign_str() that did not end with ';' as those
were multi line assignments that the sed script above would fail to catch.
Note, the same updates will need to be done for:
__assign_str_len()
__assign_rel_str()
__assign_rel_str_len()
I tested this with both an allmodconfig and an allyesconfig (build only for both).
[1] https://lore.kernel.org/linux-trace-kernel/20240222211442.634192653@goodmis.org/
Link: https://lore.kernel.org/linux-trace-kernel/20240516133454.681ba6a0@rorschach.local.home
Cc: Masami Hiramatsu <mhiramat@kernel.org>
Cc: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Julia Lawall <Julia.Lawall@inria.fr>
Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>
Acked-by: Jani Nikula <jani.nikula@intel.com>
Acked-by: Christian König <christian.koenig@amd.com> for the amdgpu parts.
Acked-by: Thomas Hellström <thomas.hellstrom@linux.intel.com> #for
Acked-by: Rafael J. Wysocki <rafael@kernel.org> # for thermal
Acked-by: Takashi Iwai <tiwai@suse.de>
Acked-by: Darrick J. Wong <djwong@kernel.org> # xfs
Tested-by: Guenter Roeck <linux@roeck-us.net>
303 lines
6.3 KiB
C
303 lines
6.3 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#undef TRACE_SYSTEM
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#define TRACE_SYSTEM cgroup
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#if !defined(_TRACE_CGROUP_H) || defined(TRACE_HEADER_MULTI_READ)
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#define _TRACE_CGROUP_H
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#include <linux/cgroup.h>
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#include <linux/tracepoint.h>
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DECLARE_EVENT_CLASS(cgroup_root,
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TP_PROTO(struct cgroup_root *root),
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TP_ARGS(root),
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TP_STRUCT__entry(
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__field( int, root )
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__field( u16, ss_mask )
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__string( name, root->name )
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),
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TP_fast_assign(
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__entry->root = root->hierarchy_id;
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__entry->ss_mask = root->subsys_mask;
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__assign_str(name);
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),
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TP_printk("root=%d ss_mask=%#x name=%s",
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__entry->root, __entry->ss_mask, __get_str(name))
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);
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DEFINE_EVENT(cgroup_root, cgroup_setup_root,
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TP_PROTO(struct cgroup_root *root),
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TP_ARGS(root)
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);
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DEFINE_EVENT(cgroup_root, cgroup_destroy_root,
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TP_PROTO(struct cgroup_root *root),
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TP_ARGS(root)
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);
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DEFINE_EVENT(cgroup_root, cgroup_remount,
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TP_PROTO(struct cgroup_root *root),
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TP_ARGS(root)
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);
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DECLARE_EVENT_CLASS(cgroup,
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TP_PROTO(struct cgroup *cgrp, const char *path),
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TP_ARGS(cgrp, path),
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TP_STRUCT__entry(
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__field( int, root )
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__field( int, level )
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__field( u64, id )
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__string( path, path )
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),
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TP_fast_assign(
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__entry->root = cgrp->root->hierarchy_id;
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__entry->id = cgroup_id(cgrp);
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__entry->level = cgrp->level;
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__assign_str(path);
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),
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TP_printk("root=%d id=%llu level=%d path=%s",
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__entry->root, __entry->id, __entry->level, __get_str(path))
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);
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DEFINE_EVENT(cgroup, cgroup_mkdir,
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TP_PROTO(struct cgroup *cgrp, const char *path),
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TP_ARGS(cgrp, path)
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);
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DEFINE_EVENT(cgroup, cgroup_rmdir,
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TP_PROTO(struct cgroup *cgrp, const char *path),
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TP_ARGS(cgrp, path)
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);
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DEFINE_EVENT(cgroup, cgroup_release,
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TP_PROTO(struct cgroup *cgrp, const char *path),
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TP_ARGS(cgrp, path)
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);
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DEFINE_EVENT(cgroup, cgroup_rename,
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TP_PROTO(struct cgroup *cgrp, const char *path),
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TP_ARGS(cgrp, path)
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);
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DEFINE_EVENT(cgroup, cgroup_freeze,
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TP_PROTO(struct cgroup *cgrp, const char *path),
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TP_ARGS(cgrp, path)
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);
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DEFINE_EVENT(cgroup, cgroup_unfreeze,
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TP_PROTO(struct cgroup *cgrp, const char *path),
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TP_ARGS(cgrp, path)
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);
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DECLARE_EVENT_CLASS(cgroup_migrate,
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TP_PROTO(struct cgroup *dst_cgrp, const char *path,
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struct task_struct *task, bool threadgroup),
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TP_ARGS(dst_cgrp, path, task, threadgroup),
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TP_STRUCT__entry(
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__field( int, dst_root )
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__field( int, dst_level )
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__field( u64, dst_id )
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__field( int, pid )
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__string( dst_path, path )
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__string( comm, task->comm )
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),
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TP_fast_assign(
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__entry->dst_root = dst_cgrp->root->hierarchy_id;
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__entry->dst_id = cgroup_id(dst_cgrp);
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__entry->dst_level = dst_cgrp->level;
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__assign_str(dst_path);
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__entry->pid = task->pid;
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__assign_str(comm);
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),
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TP_printk("dst_root=%d dst_id=%llu dst_level=%d dst_path=%s pid=%d comm=%s",
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__entry->dst_root, __entry->dst_id, __entry->dst_level,
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__get_str(dst_path), __entry->pid, __get_str(comm))
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);
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DEFINE_EVENT(cgroup_migrate, cgroup_attach_task,
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TP_PROTO(struct cgroup *dst_cgrp, const char *path,
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struct task_struct *task, bool threadgroup),
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TP_ARGS(dst_cgrp, path, task, threadgroup)
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);
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DEFINE_EVENT(cgroup_migrate, cgroup_transfer_tasks,
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TP_PROTO(struct cgroup *dst_cgrp, const char *path,
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struct task_struct *task, bool threadgroup),
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TP_ARGS(dst_cgrp, path, task, threadgroup)
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);
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DECLARE_EVENT_CLASS(cgroup_event,
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TP_PROTO(struct cgroup *cgrp, const char *path, int val),
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TP_ARGS(cgrp, path, val),
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TP_STRUCT__entry(
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__field( int, root )
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__field( int, level )
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__field( u64, id )
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__string( path, path )
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__field( int, val )
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),
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TP_fast_assign(
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__entry->root = cgrp->root->hierarchy_id;
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__entry->id = cgroup_id(cgrp);
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__entry->level = cgrp->level;
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__assign_str(path);
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__entry->val = val;
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),
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TP_printk("root=%d id=%llu level=%d path=%s val=%d",
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__entry->root, __entry->id, __entry->level, __get_str(path),
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__entry->val)
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);
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DEFINE_EVENT(cgroup_event, cgroup_notify_populated,
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TP_PROTO(struct cgroup *cgrp, const char *path, int val),
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TP_ARGS(cgrp, path, val)
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);
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DEFINE_EVENT(cgroup_event, cgroup_notify_frozen,
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TP_PROTO(struct cgroup *cgrp, const char *path, int val),
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TP_ARGS(cgrp, path, val)
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);
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DECLARE_EVENT_CLASS(cgroup_rstat,
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TP_PROTO(struct cgroup *cgrp, int cpu, bool contended),
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TP_ARGS(cgrp, cpu, contended),
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TP_STRUCT__entry(
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__field( int, root )
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__field( int, level )
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__field( u64, id )
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__field( int, cpu )
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__field( bool, contended )
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),
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TP_fast_assign(
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__entry->root = cgrp->root->hierarchy_id;
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__entry->id = cgroup_id(cgrp);
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__entry->level = cgrp->level;
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__entry->cpu = cpu;
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__entry->contended = contended;
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),
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TP_printk("root=%d id=%llu level=%d cpu=%d lock contended:%d",
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__entry->root, __entry->id, __entry->level,
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__entry->cpu, __entry->contended)
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);
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/* Related to global: cgroup_rstat_lock */
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DEFINE_EVENT(cgroup_rstat, cgroup_rstat_lock_contended,
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TP_PROTO(struct cgroup *cgrp, int cpu, bool contended),
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TP_ARGS(cgrp, cpu, contended)
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);
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DEFINE_EVENT(cgroup_rstat, cgroup_rstat_locked,
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TP_PROTO(struct cgroup *cgrp, int cpu, bool contended),
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TP_ARGS(cgrp, cpu, contended)
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);
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DEFINE_EVENT(cgroup_rstat, cgroup_rstat_unlock,
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TP_PROTO(struct cgroup *cgrp, int cpu, bool contended),
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TP_ARGS(cgrp, cpu, contended)
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);
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/* Related to per CPU: cgroup_rstat_cpu_lock */
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DEFINE_EVENT(cgroup_rstat, cgroup_rstat_cpu_lock_contended,
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TP_PROTO(struct cgroup *cgrp, int cpu, bool contended),
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TP_ARGS(cgrp, cpu, contended)
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);
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DEFINE_EVENT(cgroup_rstat, cgroup_rstat_cpu_lock_contended_fastpath,
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TP_PROTO(struct cgroup *cgrp, int cpu, bool contended),
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TP_ARGS(cgrp, cpu, contended)
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);
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DEFINE_EVENT(cgroup_rstat, cgroup_rstat_cpu_locked,
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TP_PROTO(struct cgroup *cgrp, int cpu, bool contended),
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TP_ARGS(cgrp, cpu, contended)
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);
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DEFINE_EVENT(cgroup_rstat, cgroup_rstat_cpu_locked_fastpath,
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TP_PROTO(struct cgroup *cgrp, int cpu, bool contended),
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TP_ARGS(cgrp, cpu, contended)
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);
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DEFINE_EVENT(cgroup_rstat, cgroup_rstat_cpu_unlock,
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TP_PROTO(struct cgroup *cgrp, int cpu, bool contended),
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TP_ARGS(cgrp, cpu, contended)
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);
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DEFINE_EVENT(cgroup_rstat, cgroup_rstat_cpu_unlock_fastpath,
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TP_PROTO(struct cgroup *cgrp, int cpu, bool contended),
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TP_ARGS(cgrp, cpu, contended)
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);
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#endif /* _TRACE_CGROUP_H */
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/* This part must be outside protection */
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#include <trace/define_trace.h>
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