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binder: Make transaction_log available in binderfs

Telusuri Sumber 
Currently, the binder transaction log files 'transaction_log'
and 'failed_transaction_log' live in debugfs at the following locations:

/sys/kernel/debug/binder/failed_transaction_log
/sys/kernel/debug/binder/transaction_log

This patch makes these files also available in a binderfs instance
mounted with the mount option "stats=global".
It does not affect the presence of these files in debugfs.
If a binderfs instance is mounted at path /dev/binderfs, the location of
these files will be as follows:

/dev/binderfs/binder_logs/failed_transaction_log
/dev/binderfs/binder_logs/transaction_log

This change provides an alternate option to access these files when
debugfs is not mounted.

Acked-by: Christian Brauner <christian.brauner@ubuntu.com>
Signed-off-by: Hridya Valsaraju <hridya@google.com>
Link: https://lore.kernel.org/r/20190903161655.107408-4-hridya@google.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Hridya Valsaraju
2019-09-03 09:16:54 -07:00
committed by Greg Kroah-Hartman
orang tua 0e13e452da
melakukan 03e2e07e38
3 mengubah file dengan 53 tambahan dan 29 penghapusan
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18
drivers/android/binderfs.c
Melihat File

@@ -630,6 +630,24 @@ static int init_binder_logs(struct super_block *sb)
dentry = binderfs_create_file(binder_logs_root_dir, "transactions",
&binder_transactions_fops, NULL);
if (IS_ERR(dentry)) {
ret = PTR_ERR(dentry);
goto out;
}
dentry = binderfs_create_file(binder_logs_root_dir,
"transaction_log",
&binder_transaction_log_fops,
&binder_transaction_log);
if (IS_ERR(dentry)) {
ret = PTR_ERR(dentry);
goto out;
}
dentry = binderfs_create_file(binder_logs_root_dir,
"failed_transaction_log",
&binder_transaction_log_fops,
&binder_transaction_log_failed);
if (IS_ERR(dentry))
ret = PTR_ERR(dentry);