diff options
| author | Johannes Thumshirn <jthumshirn@suse.de> | 2019-10-07 12:11:04 +0300 |
|---|---|---|
| committer | David Sterba <dsterba@suse.com> | 2019-11-18 19:51:43 +0300 |
| commit | 41e6d2a808ad89d34c662ba8dd1209c4fefb1416 (patch) | |
| tree | fc31a2b2c617bb36452b37c91530543a5e517996 /fs/btrfs/sysfs.c | |
| parent | f7cea56c0fff95bd5a6cd21b9fa299f66193b604 (diff) | |
| download | linux-41e6d2a808ad89d34c662ba8dd1209c4fefb1416.tar.xz | |
btrfs: sysfs: show used checksum driver per filesystem
Show the used driver for the checksum algorithm for the filesystem in
sysfs file /sys/fs/btrfs/UUID/features/checksum, eg.
crc32c (crc32c-generic)
Signed-off-by: Johannes Thumshirn <jthumshirn@suse.de>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Diffstat (limited to 'fs/btrfs/sysfs.c')
| -rw-r--r-- | fs/btrfs/sysfs.c | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/fs/btrfs/sysfs.c b/fs/btrfs/sysfs.c index 41eb6a313bf8..98979dd048a8 100644 --- a/fs/btrfs/sysfs.c +++ b/fs/btrfs/sysfs.c @@ -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, }; |