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binderfs: add extended_error feature entry

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Add extended_error to the binderfs feature list, to help userspace
determine whether the BINDER_GET_EXTENDED_ERROR ioctl is supported by
the binder driver.

Reviewed-by: Christian Brauner (Microsoft) <brauner@kernel.org>
Acked-by: Todd Kjos <tkjos@google.com>
Signed-off-by: Carlos Llamas <cmllamas@google.com>
Link: https://lore.kernel.org/r/20220429235644.697372-4-cmllamas@google.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Carlos Llamas 2022-04-29 23:56:42 +00:00 committed by Greg Kroah-Hartman
parent bd32889e84
commit d23386ed70
2 changed files with 9 additions and 0 deletions
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8
drivers/android/binderfs.c
View File

@ -60,6 +60,7 @@ enum binderfs_stats_mode {
struct binder_features {
bool oneway_spam_detection;
bool extended_error;
};
static const struct constant_table binderfs_param_stats[] = {
@ -75,6 +76,7 @@ static const struct fs_parameter_spec binderfs_fs_parameters[] = {
static struct binder_features binder_features = {
.oneway_spam_detection = true,
.extended_error = true,
};
static inline struct binderfs_info *BINDERFS_SB(const struct super_block *sb)
@ -615,6 +617,12 @@ static int init_binder_features(struct super_block *sb)
if (IS_ERR(dentry))
return PTR_ERR(dentry);
dentry = binderfs_create_file(dir, "extended_error",
&binder_features_fops,
&binder_features.extended_error);
if (IS_ERR(dentry))
return PTR_ERR(dentry);
return 0;
}

1
tools/testing/selftests/filesystems/binderfs/binderfs_test.c
View File

@ -64,6 +64,7 @@ static int __do_binderfs_test(struct __test_metadata *_metadata)
device_path[sizeof(P_tmpdir "/binderfs_XXXXXX/") + BINDERFS_MAX_NAME];
static const char * const binder_features[] = {
"oneway_spam_detection",
"extended_error",
};
change_mountns(_metadata);