add new system file

hc

2024-02-20 102a0743326a03cd1a1202ceda21e175b7d3575c

 kernel/drivers/android/binder_alloc.h
..
..
@@ -1,15 +1,6 @@
1
+/* SPDX-License-Identifier: GPL-2.0-only */
1
2
 /*
2
3
  * Copyright (C) 2017 Google, Inc.
3
- *
4
- * This software is licensed under the terms of the GNU General Public
5
- * License version 2, as published by the Free Software Foundation, and
6
- * may be copied, distributed, and modified under those terms.
7
- *
8
- * This program is distributed in the hope that it will be useful,
9
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
10
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
11
- * GNU General Public License for more details.
12
- *
13
4
  */
14
5
 
15
6
 #ifndef _LINUX_BINDER_ALLOC_H
..
..
@@ -32,8 +23,11 @@
32
23
  * @entry:              entry alloc->buffers
33
24
  * @rb_node:            node for allocated_buffers/free_buffers rb trees
34
25
  * @free:               %true if buffer is free
26
+ * @clear_on_free:      %true if buffer must be zeroed after use
35
27
  * @allow_user_free:    %true if user is allowed to free buffer
36
28
  * @async_transaction:  %true if buffer is in use for an async txn
29
+ * @oneway_spam_suspect: %true if total async allocate size just exceed
30
+ * spamming detect threshold
37
31
  * @debug_id:           unique ID for debugging
38
32
  * @transaction:        pointer to associated struct binder_transaction
39
33
  * @target_node:        struct binder_node associated with this buffer
..
..
@@ -50,9 +44,11 @@
50
44
 	struct rb_node rb_node; /* free entry by size or allocated entry */
51
45
 				/* by address */
52
46
 	unsigned free:1;
47
+	unsigned clear_on_free:1;
53
48
 	unsigned allow_user_free:1;
54
49
 	unsigned async_transaction:1;
55
-	unsigned debug_id:29;
50
+	unsigned oneway_spam_suspect:1;
51
+	unsigned debug_id:27;
56
52
 
57
53
 	struct binder_transaction *transaction;
58
54
 
..
..
@@ -94,6 +90,8 @@
94
90
  * @buffer_size:        size of address space specified via mmap
95
91
  * @pid:                pid for associated binder_proc (invariant after init)
96
92
  * @pages_high:         high watermark of offset in @pages
93
+ * @oneway_spam_detected: %true if oneway spam detection fired, clear that
94
+ * flag once the async buffer has returned to a healthy state
97
95
  *
98
96
  * Bookkeeping structure for per-proc address space management for binder
99
97
  * buffers. It is normally initialized during binder_init() and binder_mmap()
..
..
@@ -114,6 +112,7 @@
114
112
 	uint32_t buffer_free;
115
113
 	int pid;
116
114
 	size_t pages_high;
115
+	bool oneway_spam_detected;
117
116
 };
118
117
 
119
118
 #ifdef CONFIG_ANDROID_BINDER_IPC_SELFTEST
..
..
@@ -132,6 +131,7 @@
132
131
 						  int pid);
133
132
 extern void binder_alloc_init(struct binder_alloc *alloc);
134
133
 extern int binder_alloc_shrinker_init(void);
134
+extern void binder_alloc_shrinker_exit(void);
135
135
 extern void binder_alloc_vma_close(struct binder_alloc *alloc);
136
136
 extern struct binder_buffer *
137
137
 binder_alloc_prepare_to_free(struct binder_alloc *alloc,
..
..
@@ -171,17 +171,17 @@
171
171
 				 const void __user *from,
172
172
 				 size_t bytes);
173
173
 
174
-void binder_alloc_copy_to_buffer(struct binder_alloc *alloc,
175
-				 struct binder_buffer *buffer,
176
-				 binder_size_t buffer_offset,
177
-				 void *src,
178
-				 size_t bytes);
174
+int binder_alloc_copy_to_buffer(struct binder_alloc *alloc,
175
+				struct binder_buffer *buffer,
176
+				binder_size_t buffer_offset,
177
+				void *src,
178
+				size_t bytes);
179
179
 
180
-void binder_alloc_copy_from_buffer(struct binder_alloc *alloc,
181
-				   void *dest,
182
-				   struct binder_buffer *buffer,
183
-				   binder_size_t buffer_offset,
184
-				   size_t bytes);
180
+int binder_alloc_copy_from_buffer(struct binder_alloc *alloc,
181
+				  void *dest,
182
+				  struct binder_buffer *buffer,
183
+				  binder_size_t buffer_offset,
184
+				  size_t bytes);
185
185
 
186
186
 #endif /* _LINUX_BINDER_ALLOC_H */
187
187