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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>
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@ -396,8 +396,48 @@ static ssize_t btrfs_label_store(struct kobject *kobj,
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}
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BTRFS_ATTR_RW(label, 0644, btrfs_label_show, btrfs_label_store);
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static ssize_t btrfs_no_store(struct kobject *kobj,
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struct kobj_attribute *a,
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const char *buf, size_t len)
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{
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return -EPERM;
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}
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static ssize_t btrfs_nodesize_show(struct kobject *kobj,
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struct kobj_attribute *a, char *buf)
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{
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struct btrfs_fs_info *fs_info = to_fs_info(kobj);
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return snprintf(buf, PAGE_SIZE, "%u\n", fs_info->super_copy->nodesize);
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}
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BTRFS_ATTR_RW(nodesize, 0444, btrfs_nodesize_show, btrfs_no_store);
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static ssize_t btrfs_sectorsize_show(struct kobject *kobj,
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struct kobj_attribute *a, char *buf)
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{
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struct btrfs_fs_info *fs_info = to_fs_info(kobj);
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return snprintf(buf, PAGE_SIZE, "%u\n", fs_info->super_copy->sectorsize);
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}
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BTRFS_ATTR_RW(sectorsize, 0444, btrfs_sectorsize_show, btrfs_no_store);
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static ssize_t btrfs_clone_alignment_show(struct kobject *kobj,
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struct kobj_attribute *a, char *buf)
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{
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struct btrfs_fs_info *fs_info = to_fs_info(kobj);
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return snprintf(buf, PAGE_SIZE, "%u\n", fs_info->super_copy->sectorsize);
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}
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BTRFS_ATTR_RW(clone_alignment, 0444, btrfs_clone_alignment_show, btrfs_no_store);
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static struct attribute *btrfs_attrs[] = {
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BTRFS_ATTR_PTR(label),
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BTRFS_ATTR_PTR(nodesize),
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BTRFS_ATTR_PTR(sectorsize),
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BTRFS_ATTR_PTR(clone_alignment),
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NULL,
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};
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