1 /* SPDX-License-Identifier: GPL-2.0 */
2
3 #ifndef _LINUX_BINDER_INTERNAL_H
4 #define _LINUX_BINDER_INTERNAL_H
5
6 #include <linux/export.h>
7 #include <linux/fs.h>
8 #include <linux/list.h>
9 #include <linux/miscdevice.h>
10 #include <linux/mutex.h>
11 #include <linux/stddef.h>
12 #include <linux/types.h>
13 #include <linux/uidgid.h>
14
15 struct binder_context {
16 struct binder_node *binder_context_mgr_node;
17 struct mutex context_mgr_node_lock;
18 kuid_t binder_context_mgr_uid;
19 const char *name;
20 };
21
22 /**
23 * struct binder_device - information about a binder device node
24 * @hlist: list of binder devices (only used for devices requested via
25 * CONFIG_ANDROID_BINDER_DEVICES)
26 * @miscdev: information about a binder character device node
27 * @context: binder context information
28 * @binderfs_inode: This is the inode of the root dentry of the super block
29 * belonging to a binderfs mount.
30 */
31 struct binder_device {
32 struct hlist_node hlist;
33 struct miscdevice miscdev;
34 struct binder_context context;
35 struct inode *binderfs_inode;
36 };
37
38 /**
39 * binderfs_mount_opts - mount options for binderfs
40 * @max: maximum number of allocatable binderfs binder devices
41 * @stats_mode: enable binder stats in binderfs.
42 */
43 struct binderfs_mount_opts {
44 int max;
45 int stats_mode;
46 };
47
48 /**
49 * binderfs_info - information about a binderfs mount
50 * @ipc_ns: The ipc namespace the binderfs mount belongs to.
51 * @control_dentry: This records the dentry of this binderfs mount
52 * binder-control device.
53 * @root_uid: uid that needs to be used when a new binder device is
54 * created.
55 * @root_gid: gid that needs to be used when a new binder device is
56 * created.
57 * @mount_opts: The mount options in use.
58 * @device_count: The current number of allocated binder devices.
59 * @proc_log_dir: Pointer to the directory dentry containing process-specific
60 * logs.
61 */
62 struct binderfs_info {
63 struct ipc_namespace *ipc_ns;
64 struct dentry *control_dentry;
65 kuid_t root_uid;
66 kgid_t root_gid;
67 struct binderfs_mount_opts mount_opts;
68 int device_count;
69 struct dentry *proc_log_dir;
70 };
71
72 extern const struct file_operations binder_fops;
73
74 extern char *binder_devices_param;
75
76 #ifdef CONFIG_ANDROID_BINDERFS
77 extern bool is_binderfs_device(const struct inode *inode);
78 extern struct dentry *binderfs_create_file(struct dentry *dir, const char *name,
79 const struct file_operations *fops,
80 void *data);
81 extern void binderfs_remove_file(struct dentry *dentry);
82 #else
is_binderfs_device(const struct inode * inode)83 static inline bool is_binderfs_device(const struct inode *inode)
84 {
85 return false;
86 }
binderfs_create_file(struct dentry * dir,const char * name,const struct file_operations * fops,void * data)87 static inline struct dentry *binderfs_create_file(struct dentry *dir,
88 const char *name,
89 const struct file_operations *fops,
90 void *data)
91 {
92 return NULL;
93 }
binderfs_remove_file(struct dentry * dentry)94 static inline void binderfs_remove_file(struct dentry *dentry) {}
95 #endif
96
97 #ifdef CONFIG_ANDROID_BINDERFS
98 extern int __init init_binderfs(void);
99 #else
init_binderfs(void)100 static inline int __init init_binderfs(void)
101 {
102 return 0;
103 }
104 #endif
105
106 int binder_stats_show(struct seq_file *m, void *unused);
107 DEFINE_SHOW_ATTRIBUTE(binder_stats);
108
109 int binder_state_show(struct seq_file *m, void *unused);
110 DEFINE_SHOW_ATTRIBUTE(binder_state);
111
112 int binder_transactions_show(struct seq_file *m, void *unused);
113 DEFINE_SHOW_ATTRIBUTE(binder_transactions);
114
115 int binder_transaction_log_show(struct seq_file *m, void *unused);
116 DEFINE_SHOW_ATTRIBUTE(binder_transaction_log);
117
118 struct binder_transaction_log_entry {
119 int debug_id;
120 int debug_id_done;
121 int call_type;
122 int from_proc;
123 int from_thread;
124 int target_handle;
125 int to_proc;
126 int to_thread;
127 int to_node;
128 int data_size;
129 int offsets_size;
130 int return_error_line;
131 uint32_t return_error;
132 uint32_t return_error_param;
133 char context_name[BINDERFS_MAX_NAME + 1];
134 };
135
136 struct binder_transaction_log {
137 atomic_t cur;
138 bool full;
139 struct binder_transaction_log_entry entry[32];
140 };
141
142 extern struct binder_transaction_log binder_transaction_log;
143 extern struct binder_transaction_log binder_transaction_log_failed;
144 #endif /* _LINUX_BINDER_INTERNAL_H */
145