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btrfs: export more from FS_INFO to sysfs 

Similar to the FS_INFO updates, export the basic filesystem info through
sysfs: node size, sector size and clone alignment.

Signed-off-by: David Sterba <dsterba@suse.cz>
Signed-off-by: Chris Mason <clm@fb.com>
wifi-calibration
David Sterba 2014-05-07 18:17:16 +02:00 committed by Chris Mason
parent 80a773fbfc
commit df93589a17
1 changed files with 40 additions and 0 deletions
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40
fs/btrfs/sysfs.c
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@ -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,
};