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ANDROID: binder: Add vendor hook to the binder

Browse source 
- To apply vendor's performance tune for blocked binder transaction,
     add the hook on the begin/end of transaction.

   - ANDROID_VENDOR_DATA added to binder_transaction.

Bug: 161400830

Signed-off-by: JianMin Liu <jian-min.liu@mediatek.com>
Change-Id: If60870623ce2669200238172737dd8455ac34b02
This commit is contained in:
JianMin Liu 2020-07-21 12:13:35 +08:00 • committed by Todd Kjos
commit 06f8eab9f4
3 changed files with 45 additions and 0 deletions
Download patch file Download diff file Expand all files Collapse all files

8
drivers/android/binder.c
View file

@ -65,6 +65,7 @@
#include <linux/ratelimit.h>
#include <linux/syscalls.h>
#include <linux/task_work.h>
#include <linux/android_vendor.h>
#include <uapi/linux/sched/types.h>
#include <uapi/linux/android/binder.h>
@ -75,6 +76,7 @@
#include "binder_alloc.h"
#include "binder_internal.h"
#include "binder_trace.h"
#include <trace/hooks/binder.h>
static HLIST_HEAD(binder_deferred_list);
static DEFINE_MUTEX(binder_deferred_lock);
@ -620,6 +622,7 @@ struct binder_transaction {
* during thread teardown
*/
spinlock_t lock;
ANDROID_VENDOR_DATA(1);
};
/**
@ -1207,6 +1210,7 @@ static void binder_transaction_priority(struct task_struct *task,
}
binder_set_priority(task, desired_prio);
trace_android_vh_binder_set_priority(t, task);
}
static struct binder_node *binder_get_node_ilocked(struct binder_proc *proc,
@ -3230,6 +3234,7 @@ static void binder_transaction(struct binder_proc *proc,
INIT_LIST_HEAD(&t->fd_fixups);
binder_stats_created(BINDER_STAT_TRANSACTION);
spin_lock_init(&t->lock);
trace_android_vh_binder_transaction_init(t);
tcomplete = kzalloc(sizeof(*tcomplete), GFP_KERNEL);
if (tcomplete == NULL) {
@ -3605,6 +3610,7 @@ static void binder_transaction(struct binder_proc *proc,
binder_enqueue_thread_work_ilocked(target_thread, &t->work);
binder_inner_proc_unlock(target_proc);
wake_up_interruptible_sync(&target_thread->wait);
trace_android_vh_binder_restore_priority(in_reply_to, current);
binder_restore_priority(current, in_reply_to->saved_priority);
binder_free_transaction(in_reply_to);
} else if (!(t->flags & TF_ONE_WAY)) {
@ -3716,6 +3722,7 @@ err_invalid_target_handle:
BUG_ON(thread->return_error.cmd != BR_OK);
if (in_reply_to) {
trace_android_vh_binder_restore_priority(in_reply_to, current);
binder_restore_priority(current, in_reply_to->saved_priority);
thread->return_error.cmd = BR_TRANSACTION_COMPLETE;
binder_enqueue_thread_work(thread, &thread->return_error.work);
@ -4390,6 +4397,7 @@ retry:
wait_event_interruptible(binder_user_error_wait,
binder_stop_on_user_error < 2);
}
trace_android_vh_binder_restore_priority(NULL, current);
binder_restore_priority(current, proc->default_priority);
}

4
drivers/android/vendor_hooks.c
View file

@ -11,6 +11,7 @@
#include <trace/hooks/sched.h>
#include <trace/hooks/dtask.h>
#include <trace/hooks/net.h>
#include <trace/hooks/binder.h>
/*
* Export tracepoints that act as a bare tracehook (ie: have no trace event
@ -26,3 +27,6 @@ EXPORT_TRACEPOINT_SYMBOL_GPL(android_vh_rwsem_write_wait_finish);
EXPORT_TRACEPOINT_SYMBOL_GPL(android_vh_sched_show_task);
EXPORT_TRACEPOINT_SYMBOL_GPL(android_vh_ptype_head);
EXPORT_TRACEPOINT_SYMBOL_GPL(android_vh_kfree_skb);
EXPORT_TRACEPOINT_SYMBOL_GPL(android_vh_binder_transaction_init);
EXPORT_TRACEPOINT_SYMBOL_GPL(android_vh_binder_set_priority);
EXPORT_TRACEPOINT_SYMBOL_GPL(android_vh_binder_restore_priority);

33
include/trace/hooks/binder.h Normal file
View file

@ -0,0 +1,33 @@
/* SPDX-License-Identifier: GPL-2.0 */
#undef TRACE_SYSTEM
#define TRACE_SYSTEM binder
#undef TRACE_INCLUDE_PATH
#define TRACE_INCLUDE_PATH trace/hooks
#if !defined(_TRACE_HOOK_BINDER_H) || defined(TRACE_HEADER_MULTI_READ)
#define _TRACE_HOOK_BINDER_H
#include <linux/tracepoint.h>
#include <trace/hooks/vendor_hooks.h>
/*
* Following tracepoints are not exported in tracefs and provide a
* mechanism for vendor modules to hook and extend functionality
*/
#if defined(CONFIG_TRACEPOINTS) && defined(CONFIG_ANDROID_VENDOR_HOOKS)
struct binder_transaction;
struct task_struct;
DECLARE_HOOK(android_vh_binder_transaction_init,
TP_PROTO(struct binder_transaction *t),
TP_ARGS(t));
DECLARE_HOOK(android_vh_binder_set_priority,
TP_PROTO(struct binder_transaction *t, struct task_struct *task),
TP_ARGS(t, task));
DECLARE_HOOK(android_vh_binder_restore_priority,
TP_PROTO(struct binder_transaction *t, struct task_struct *task),
TP_ARGS(t, task));
#else
#define trace_android_vh_binder_transaction_init(t)
#define trace_android_vh_binder_set_priority(t, task)
#define trace_android_vh_binder_restore_priority(t, task)
#endif
#endif /* _TRACE_HOOK_BINDER_H */
/* This part must be outside protection */
#include <trace/define_trace.h>