diff options
Diffstat (limited to 'fs/btrfs/sysfs.c')
| -rw-r--r-- | fs/btrfs/sysfs.c | 40 |
1 files changed, 40 insertions, 0 deletions
diff --git a/fs/btrfs/sysfs.c b/fs/btrfs/sysfs.c index c5eb2143dc66..ba2a645dee07 100644 --- a/fs/btrfs/sysfs.c +++ b/fs/btrfs/sysfs.c @@ -396,8 +396,48 @@ static ssize_t btrfs_label_store(struct kobject *kobj, } BTRFS_ATTR_RW(label, 0644, btrfs_label_show, btrfs_label_store); +static ssize_t btrfs_no_store(struct kobject *kobj, + struct kobj_attribute *a, + const char *buf, size_t len) +{ + return -EPERM; +} + +static ssize_t btrfs_nodesize_show(struct kobject *kobj, + struct kobj_attribute *a, char *buf) +{ + struct btrfs_fs_info *fs_info = to_fs_info(kobj); + + return snprintf(buf, PAGE_SIZE, "%u\n", fs_info->super_copy->nodesize); +} + +BTRFS_ATTR_RW(nodesize, 0444, btrfs_nodesize_show, btrfs_no_store); + +static ssize_t btrfs_sectorsize_show(struct kobject *kobj, + struct kobj_attribute *a, char *buf) +{ + struct btrfs_fs_info *fs_info = to_fs_info(kobj); + + return snprintf(buf, PAGE_SIZE, "%u\n", fs_info->super_copy->sectorsize); +} + +BTRFS_ATTR_RW(sectorsize, 0444, btrfs_sectorsize_show, btrfs_no_store); + +static ssize_t btrfs_clone_alignment_show(struct kobject *kobj, + struct kobj_attribute *a, char *buf) +{ + struct btrfs_fs_info *fs_info = to_fs_info(kobj); + + return snprintf(buf, PAGE_SIZE, "%u\n", fs_info->super_copy->sectorsize); +} + +BTRFS_ATTR_RW(clone_alignment, 0444, btrfs_clone_alignment_show, btrfs_no_store); + static struct attribute *btrfs_attrs[] = { BTRFS_ATTR_PTR(label), + BTRFS_ATTR_PTR(nodesize), + BTRFS_ATTR_PTR(sectorsize), + BTRFS_ATTR_PTR(clone_alignment), NULL, }; |