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6#ifndef _LINUX_BINDER_ALLOC_H
7#define _LINUX_BINDER_ALLOC_H
8
9#include <linux/rbtree.h>
10#include <linux/list.h>
11#include <linux/mm.h>
12#include <linux/rtmutex.h>
13#include <linux/vmalloc.h>
14#include <linux/slab.h>
15#include <linux/list_lru.h>
16#include <uapi/linux/android/binder.h>
17
18extern struct list_lru binder_alloc_lru;
19struct binder_transaction;
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42struct binder_buffer {
43 struct list_head entry;
44 struct rb_node rb_node;
45
46 unsigned free:1;
47 unsigned clear_on_free:1;
48 unsigned allow_user_free:1;
49 unsigned async_transaction:1;
50 unsigned oneway_spam_suspect:1;
51 unsigned debug_id:27;
52
53 struct binder_transaction *transaction;
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55 struct binder_node *target_node;
56 size_t data_size;
57 size_t offsets_size;
58 size_t extra_buffers_size;
59 void __user *user_data;
60 int pid;
61};
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69struct binder_lru_page {
70 struct list_head lru;
71 struct page *page_ptr;
72 struct binder_alloc *alloc;
73};
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101struct binder_alloc {
102 struct mutex mutex;
103 struct vm_area_struct *vma;
104 struct mm_struct *vma_vm_mm;
105 void __user *buffer;
106 struct list_head buffers;
107 struct rb_root free_buffers;
108 struct rb_root allocated_buffers;
109 size_t free_async_space;
110 struct binder_lru_page *pages;
111 size_t buffer_size;
112 uint32_t buffer_free;
113 int pid;
114 size_t pages_high;
115 bool oneway_spam_detected;
116};
117
118#ifdef CONFIG_ANDROID_BINDER_IPC_SELFTEST
119void binder_selftest_alloc(struct binder_alloc *alloc);
120#else
121static inline void binder_selftest_alloc(struct binder_alloc *alloc) {}
122#endif
123enum lru_status binder_alloc_free_page(struct list_head *item,
124 struct list_lru_one *lru,
125 spinlock_t *lock, void *cb_arg);
126extern struct binder_buffer *binder_alloc_new_buf(struct binder_alloc *alloc,
127 size_t data_size,
128 size_t offsets_size,
129 size_t extra_buffers_size,
130 int is_async,
131 int pid);
132extern void binder_alloc_init(struct binder_alloc *alloc);
133extern int binder_alloc_shrinker_init(void);
134extern void binder_alloc_vma_close(struct binder_alloc *alloc);
135extern struct binder_buffer *
136binder_alloc_prepare_to_free(struct binder_alloc *alloc,
137 uintptr_t user_ptr);
138extern void binder_alloc_free_buf(struct binder_alloc *alloc,
139 struct binder_buffer *buffer);
140extern int binder_alloc_mmap_handler(struct binder_alloc *alloc,
141 struct vm_area_struct *vma);
142extern void binder_alloc_deferred_release(struct binder_alloc *alloc);
143extern int binder_alloc_get_allocated_count(struct binder_alloc *alloc);
144extern void binder_alloc_print_allocated(struct seq_file *m,
145 struct binder_alloc *alloc);
146void binder_alloc_print_pages(struct seq_file *m,
147 struct binder_alloc *alloc);
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155static inline size_t
156binder_alloc_get_free_async_space(struct binder_alloc *alloc)
157{
158 size_t free_async_space;
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160 mutex_lock(&alloc->mutex);
161 free_async_space = alloc->free_async_space;
162 mutex_unlock(&alloc->mutex);
163 return free_async_space;
164}
165
166unsigned long
167binder_alloc_copy_user_to_buffer(struct binder_alloc *alloc,
168 struct binder_buffer *buffer,
169 binder_size_t buffer_offset,
170 const void __user *from,
171 size_t bytes);
172
173int binder_alloc_copy_to_buffer(struct binder_alloc *alloc,
174 struct binder_buffer *buffer,
175 binder_size_t buffer_offset,
176 void *src,
177 size_t bytes);
178
179int binder_alloc_copy_from_buffer(struct binder_alloc *alloc,
180 void *dest,
181 struct binder_buffer *buffer,
182 binder_size_t buffer_offset,
183 size_t bytes);
184
185#endif
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