btrfs: sysfs: show used checksum driver per filesystem (41e6d2a8) · Commits · 戴 / test

fs/btrfs/sysfs.c

+15 −0

Original line number	Diff line number	Diff line
		@@ -9,6 +9,7 @@
		#include <linux/spinlock.h>
		#include <linux/completion.h>
		#include <linux/bug.h>
		#include <crypto/hash.h>

		#include "ctree.h"
		#include "disk-io.h"
		@@ -626,6 +627,19 @@ static ssize_t btrfs_metadata_uuid_show(struct kobject *kobj,

		BTRFS_ATTR(, metadata_uuid, btrfs_metadata_uuid_show);

		static ssize_t btrfs_checksum_show(struct kobject *kobj,
		struct kobj_attribute a, char buf)
		{
		struct btrfs_fs_info *fs_info = to_fs_info(kobj);
		u16 csum_type = btrfs_super_csum_type(fs_info->super_copy);

		return snprintf(buf, PAGE_SIZE, "%s (%s)\n",
		btrfs_super_csum_name(csum_type),
		crypto_shash_driver_name(fs_info->csum_shash));
		}

		BTRFS_ATTR(, checksum, btrfs_checksum_show);

		static const struct attribute *btrfs_attrs[] = {
		BTRFS_ATTR_PTR(, label),
		BTRFS_ATTR_PTR(, nodesize),
		@@ -633,6 +647,7 @@ static const struct attribute *btrfs_attrs[] = {
		BTRFS_ATTR_PTR(, clone_alignment),
		BTRFS_ATTR_PTR(, quota_override),
		BTRFS_ATTR_PTR(, metadata_uuid),
		BTRFS_ATTR_PTR(, checksum),
		NULL,
		};