1 files changed, 45 insertions, 22 deletions

diff --git a/fs/erofs/sysfs.c b/fs/erofs/sysfs.c
index dad4e6c6c155..eed8797a193f 100644
--- a/fs/erofs/sysfs.c
+++ b/fs/erofs/sysfs.c
@@ -7,12 +7,14 @@
 #include <linux/kobject.h>
 
 #include "internal.h"
+#include "compress.h"
 
 enum {
 	attr_feature,
 	attr_drop_caches,
 	attr_pointer_ui,
 	attr_pointer_bool,
+	attr_accel,
 };
 
 enum {
@@ -60,14 +62,25 @@ static struct erofs_attr erofs_attr_##_name = {			\
 EROFS_ATTR_RW_UI(sync_decompress, erofs_mount_opts);
 EROFS_ATTR_FUNC(drop_caches, 0200);
 #endif
+#ifdef CONFIG_EROFS_FS_ZIP_ACCEL
+EROFS_ATTR_FUNC(accel, 0644);
+#endif
 
-static struct attribute *erofs_attrs[] = {
+static struct attribute *erofs_sb_attrs[] = {
 #ifdef CONFIG_EROFS_FS_ZIP
 	ATTR_LIST(sync_decompress),
 	ATTR_LIST(drop_caches),
 #endif
 	NULL,
 };
+ATTRIBUTE_GROUPS(erofs_sb);
+
+static struct attribute *erofs_attrs[] = {
+#ifdef CONFIG_EROFS_FS_ZIP_ACCEL
+	ATTR_LIST(accel),
+#endif
+	NULL,
+};
 ATTRIBUTE_GROUPS(erofs);
 
 /* Features this copy of erofs supports */
@@ -128,12 +141,14 @@ static ssize_t erofs_attr_show(struct kobject *kobj,
 		if (!ptr)
 			return 0;
 		return sysfs_emit(buf, "%d\n", *(bool *)ptr);
+	case attr_accel:
+		return z_erofs_crypto_show_engines(buf, PAGE_SIZE, '\n');
 	}
 	return 0;
 }
 
 static ssize_t erofs_attr_store(struct kobject *kobj, struct attribute *attr,
-						const char *buf, size_t len)
+				const char *buf, size_t len)
 {
 	struct erofs_sb_info *sbi = container_of(kobj, struct erofs_sb_info,
 						s_kobj);
@@ -182,6 +197,19 @@ static ssize_t erofs_attr_store(struct kobject *kobj, struct attribute *attr,
 			invalidate_mapping_pages(MNGD_MAPPING(sbi), 0, -1);
 		return len;
 #endif
+#ifdef CONFIG_EROFS_FS_ZIP_ACCEL
+	case attr_accel:
+		buf = skip_spaces(buf);
+		z_erofs_crypto_disable_all_engines();
+		while (*buf) {
+			t = strcspn(buf, "\n");
+			ret = z_erofs_crypto_enable_engine(buf, t);
+			if (ret < 0)
+				return ret;
+			buf += buf[t] != '\0' ? t + 1 : t;
+		}
+		return len;
+#endif
 	}
 	return 0;
 }
@@ -199,12 +227,13 @@ static const struct sysfs_ops erofs_attr_ops = {
 };
 
 static const struct kobj_type erofs_sb_ktype = {
-	.default_groups = erofs_groups,
+	.default_groups = erofs_sb_groups,
 	.sysfs_ops	= &erofs_attr_ops,
 	.release	= erofs_sb_release,
 };
 
 static const struct kobj_type erofs_ktype = {
+	.default_groups = erofs_groups,
 	.sysfs_ops	= &erofs_attr_ops,
 };
 
@@ -248,6 +277,12 @@ void erofs_unregister_sysfs(struct super_block *sb)
 	}
 }
 
+void erofs_exit_sysfs(void)
+{
+	kobject_put(&erofs_feat);
+	kset_unregister(&erofs_root);
+}
+
 int __init erofs_init_sysfs(void)
 {
 	int ret;
@@ -255,24 +290,12 @@ int __init erofs_init_sysfs(void)
 	kobject_set_name(&erofs_root.kobj, "erofs");
 	erofs_root.kobj.parent = fs_kobj;
 	ret = kset_register(&erofs_root);
-	if (ret)
-		goto root_err;
-
-	ret = kobject_init_and_add(&erofs_feat, &erofs_feat_ktype,
-				   NULL, "features");
-	if (ret)
-		goto feat_err;
-	return ret;
-
-feat_err:
-	kobject_put(&erofs_feat);
-	kset_unregister(&erofs_root);
-root_err:
+	if (!ret) {
+		ret = kobject_init_and_add(&erofs_feat, &erofs_feat_ktype,
+					   NULL, "features");
+		if (!ret)
+			return 0;
+		erofs_exit_sysfs();
+	}
 	return ret;
 }
-
-void erofs_exit_sysfs(void)
-{
-	kobject_put(&erofs_feat);
-	kset_unregister(&erofs_root);
-}