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-rw-r--r--drivers/android/binder.c15
-rw-r--r--drivers/android/binder_internal.h8
-rw-r--r--drivers/android/binderfs.c140
3 files changed, 153 insertions, 10 deletions
diff --git a/drivers/android/binder.c b/drivers/android/binder.c
index ef2d3e582368..4b4ab5790678 100644
--- a/drivers/android/binder.c
+++ b/drivers/android/binder.c
@@ -5907,7 +5907,7 @@ static void print_binder_proc_stats(struct seq_file *m,
}
-static int state_show(struct seq_file *m, void *unused)
+int binder_state_show(struct seq_file *m, void *unused)
{
struct binder_proc *proc;
struct binder_node *node;
@@ -5946,7 +5946,7 @@ static int state_show(struct seq_file *m, void *unused)
return 0;
}
-static int stats_show(struct seq_file *m, void *unused)
+int binder_stats_show(struct seq_file *m, void *unused)
{
struct binder_proc *proc;
@@ -5962,7 +5962,7 @@ static int stats_show(struct seq_file *m, void *unused)
return 0;
}
-static int transactions_show(struct seq_file *m, void *unused)
+int binder_transactions_show(struct seq_file *m, void *unused)
{
struct binder_proc *proc;
@@ -6050,9 +6050,6 @@ const struct file_operations binder_fops = {
.release = binder_release,
};
-DEFINE_SHOW_ATTRIBUTE(state);
-DEFINE_SHOW_ATTRIBUTE(stats);
-DEFINE_SHOW_ATTRIBUTE(transactions);
DEFINE_SHOW_ATTRIBUTE(transaction_log);
static int __init init_binder_device(const char *name)
@@ -6108,17 +6105,17 @@ static int __init binder_init(void)
0444,
binder_debugfs_dir_entry_root,
NULL,
- &state_fops);
+ &binder_state_fops);
debugfs_create_file("stats",
0444,
binder_debugfs_dir_entry_root,
NULL,
- &stats_fops);
+ &binder_stats_fops);
debugfs_create_file("transactions",
0444,
binder_debugfs_dir_entry_root,
NULL,
- &transactions_fops);
+ &binder_transactions_fops);
debugfs_create_file("transaction_log",
0444,
binder_debugfs_dir_entry_root,
diff --git a/drivers/android/binder_internal.h b/drivers/android/binder_internal.h
index fe8c745dc8e0..12ef96f256c6 100644
--- a/drivers/android/binder_internal.h
+++ b/drivers/android/binder_internal.h
@@ -57,4 +57,12 @@ static inline int __init init_binderfs(void)
}
#endif
+int binder_stats_show(struct seq_file *m, void *unused);
+DEFINE_SHOW_ATTRIBUTE(binder_stats);
+
+int binder_state_show(struct seq_file *m, void *unused);
+DEFINE_SHOW_ATTRIBUTE(binder_state);
+
+int binder_transactions_show(struct seq_file *m, void *unused);
+DEFINE_SHOW_ATTRIBUTE(binder_transactions);
#endif /* _LINUX_BINDER_INTERNAL_H */
diff --git a/drivers/android/binderfs.c b/drivers/android/binderfs.c
index e54c99bc995f..f2539b6a4968 100644
--- a/drivers/android/binderfs.c
+++ b/drivers/android/binderfs.c
@@ -280,7 +280,7 @@ static void binderfs_evict_inode(struct inode *inode)
clear_inode(inode);
- if (!device)
+ if (!S_ISCHR(inode->i_mode) || !device)
return;
mutex_lock(&binderfs_minors_mutex);
@@ -502,6 +502,141 @@ static const struct inode_operations binderfs_dir_inode_operations = {
.unlink = binderfs_unlink,
};
+static struct inode *binderfs_make_inode(struct super_block *sb, int mode)
+{
+ struct inode *ret;
+
+ ret = new_inode(sb);
+ if (ret) {
+ ret->i_ino = iunique(sb, BINDERFS_MAX_MINOR + INODE_OFFSET);
+ ret->i_mode = mode;
+ ret->i_atime = ret->i_mtime = ret->i_ctime = current_time(ret);
+ }
+ return ret;
+}
+
+static struct dentry *binderfs_create_dentry(struct dentry *parent,
+ const char *name)
+{
+ struct dentry *dentry;
+
+ dentry = lookup_one_len(name, parent, strlen(name));
+ if (IS_ERR(dentry))
+ return dentry;
+
+ /* Return error if the file/dir already exists. */
+ if (d_really_is_positive(dentry)) {
+ dput(dentry);
+ return ERR_PTR(-EEXIST);
+ }
+
+ return dentry;
+}
+
+static struct dentry *binderfs_create_file(struct dentry *parent,
+ const char *name,
+ const struct file_operations *fops,
+ void *data)
+{
+ struct dentry *dentry;
+ struct inode *new_inode, *parent_inode;
+ struct super_block *sb;
+
+ parent_inode = d_inode(parent);
+ inode_lock(parent_inode);
+
+ dentry = binderfs_create_dentry(parent, name);
+ if (IS_ERR(dentry))
+ goto out;
+
+ sb = parent_inode->i_sb;
+ new_inode = binderfs_make_inode(sb, S_IFREG | 0444);
+ if (!new_inode) {
+ dput(dentry);
+ dentry = ERR_PTR(-ENOMEM);
+ goto out;
+ }
+
+ new_inode->i_fop = fops;
+ new_inode->i_private = data;
+ d_instantiate(dentry, new_inode);
+ fsnotify_create(parent_inode, dentry);
+
+out:
+ inode_unlock(parent_inode);
+ return dentry;
+}
+
+static struct dentry *binderfs_create_dir(struct dentry *parent,
+ const char *name)
+{
+ struct dentry *dentry;
+ struct inode *new_inode, *parent_inode;
+ struct super_block *sb;
+
+ parent_inode = d_inode(parent);
+ inode_lock(parent_inode);
+
+ dentry = binderfs_create_dentry(parent, name);
+ if (IS_ERR(dentry))
+ goto out;
+
+ sb = parent_inode->i_sb;
+ new_inode = binderfs_make_inode(sb, S_IFDIR | 0755);
+ if (!new_inode) {
+ dput(dentry);
+ dentry = ERR_PTR(-ENOMEM);
+ goto out;
+ }
+
+ new_inode->i_fop = &simple_dir_operations;
+ new_inode->i_op = &simple_dir_inode_operations;
+
+ set_nlink(new_inode, 2);
+ d_instantiate(dentry, new_inode);
+ inc_nlink(parent_inode);
+ fsnotify_mkdir(parent_inode, dentry);
+
+out:
+ inode_unlock(parent_inode);
+ return dentry;
+}
+
+static int init_binder_logs(struct super_block *sb)
+{
+ struct dentry *binder_logs_root_dir, *dentry;
+ int ret = 0;
+
+ binder_logs_root_dir = binderfs_create_dir(sb->s_root,
+ "binder_logs");
+ if (IS_ERR(binder_logs_root_dir)) {
+ ret = PTR_ERR(binder_logs_root_dir);
+ goto out;
+ }
+
+ dentry = binderfs_create_file(binder_logs_root_dir, "stats",
+ &binder_stats_fops, NULL);
+ if (IS_ERR(dentry)) {
+ ret = PTR_ERR(dentry);
+ goto out;
+ }
+
+ dentry = binderfs_create_file(binder_logs_root_dir, "state",
+ &binder_state_fops, NULL);
+ if (IS_ERR(dentry)) {
+ ret = PTR_ERR(dentry);
+ goto out;
+ }
+
+ dentry = binderfs_create_file(binder_logs_root_dir, "transactions",
+ &binder_transactions_fops, NULL);
+ if (IS_ERR(dentry))
+ ret = PTR_ERR(dentry);
+
+out:
+ return ret;
+}
+
static int binderfs_fill_super(struct super_block *sb, void *data, int silent)
{
int ret;
@@ -579,6 +714,9 @@ static int binderfs_fill_super(struct super_block *sb, void *data, int silent)
name++;
}
+ if (info->mount_opts.stats_mode == STATS_GLOBAL)
+ return init_binder_logs(sb);
+
return 0;
}
generated by cgit v1.2.3 (git 2.39.0) at 2024-12-18 12:29:42 +0300