change system file

hc

2024-10-09 244b2c5ca8b14627e4a17755e5922221e121c771

 kernel/drivers/android/binder_alloc.h
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@@ -1,15 +1,6 @@
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+/* SPDX-License-Identifier: GPL-2.0-only */
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 /*
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  * Copyright (C) 2017 Google, Inc.
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- *
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- * This software is licensed under the terms of the GNU General Public
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- * License version 2, as published by the Free Software Foundation, and
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- * may be copied, distributed, and modified under those terms.
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- *
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- * This program is distributed in the hope that it will be useful,
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- * but WITHOUT ANY WARRANTY; without even the implied warranty of
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- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
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- * GNU General Public License for more details.
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- *
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  */
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 #ifndef _LINUX_BINDER_ALLOC_H
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@@ -32,8 +23,11 @@
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  * @entry:              entry alloc->buffers
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  * @rb_node:            node for allocated_buffers/free_buffers rb trees
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  * @free:               %true if buffer is free
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+ * @clear_on_free:      %true if buffer must be zeroed after use
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  * @allow_user_free:    %true if user is allowed to free buffer
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  * @async_transaction:  %true if buffer is in use for an async txn
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+ * @oneway_spam_suspect: %true if total async allocate size just exceed
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+ * spamming detect threshold
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  * @debug_id:           unique ID for debugging
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  * @transaction:        pointer to associated struct binder_transaction
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  * @target_node:        struct binder_node associated with this buffer
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@@ -50,9 +44,11 @@
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 	struct rb_node rb_node; /* free entry by size or allocated entry */
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 				/* by address */
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 	unsigned free:1;
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+	unsigned clear_on_free:1;
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 	unsigned allow_user_free:1;
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 	unsigned async_transaction:1;
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-	unsigned debug_id:29;
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+	unsigned oneway_spam_suspect:1;
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+	unsigned debug_id:27;
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 	struct binder_transaction *transaction;
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@@ -94,6 +90,8 @@
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  * @buffer_size:        size of address space specified via mmap
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  * @pid:                pid for associated binder_proc (invariant after init)
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  * @pages_high:         high watermark of offset in @pages
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+ * @oneway_spam_detected: %true if oneway spam detection fired, clear that
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+ * flag once the async buffer has returned to a healthy state
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  *
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  * Bookkeeping structure for per-proc address space management for binder
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  * buffers. It is normally initialized during binder_init() and binder_mmap()
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@@ -114,6 +112,7 @@
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 	uint32_t buffer_free;
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 	int pid;
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 	size_t pages_high;
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+	bool oneway_spam_detected;
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 };
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 #ifdef CONFIG_ANDROID_BINDER_IPC_SELFTEST
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@@ -132,6 +131,7 @@
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 						  int pid);
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 extern void binder_alloc_init(struct binder_alloc *alloc);
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 extern int binder_alloc_shrinker_init(void);
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+extern void binder_alloc_shrinker_exit(void);
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 extern void binder_alloc_vma_close(struct binder_alloc *alloc);
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 extern struct binder_buffer *
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 binder_alloc_prepare_to_free(struct binder_alloc *alloc,
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@@ -171,17 +171,17 @@
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 				 const void __user *from,
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 				 size_t bytes);
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-void binder_alloc_copy_to_buffer(struct binder_alloc *alloc,
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-				 struct binder_buffer *buffer,
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-				 binder_size_t buffer_offset,
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-				 void *src,
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-				 size_t bytes);
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+int binder_alloc_copy_to_buffer(struct binder_alloc *alloc,
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+				struct binder_buffer *buffer,
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+				binder_size_t buffer_offset,
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+				void *src,
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+				size_t bytes);
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-void binder_alloc_copy_from_buffer(struct binder_alloc *alloc,
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-				   void *dest,
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-				   struct binder_buffer *buffer,
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-				   binder_size_t buffer_offset,
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-				   size_t bytes);
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+int binder_alloc_copy_from_buffer(struct binder_alloc *alloc,
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+				  void *dest,
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+				  struct binder_buffer *buffer,
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+				  binder_size_t buffer_offset,
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+				  size_t bytes);
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 #endif /* _LINUX_BINDER_ALLOC_H */
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