diff options
Diffstat (limited to 'fs/btrfs/sysfs.c')
-rw-r--r-- | fs/btrfs/sysfs.c | 50 |
1 files changed, 44 insertions, 6 deletions
diff --git a/fs/btrfs/sysfs.c b/fs/btrfs/sysfs.c index c5eb2143dc6..df39458f148 100644 --- a/fs/btrfs/sysfs.c +++ b/fs/btrfs/sysfs.c @@ -254,6 +254,7 @@ static ssize_t global_rsv_reserved_show(struct kobject *kobj, BTRFS_ATTR(global_rsv_reserved, 0444, global_rsv_reserved_show); #define to_space_info(_kobj) container_of(_kobj, struct btrfs_space_info, kobj) +#define to_raid_kobj(_kobj) container_of(_kobj, struct raid_kobject, kobj) static ssize_t raid_bytes_show(struct kobject *kobj, struct kobj_attribute *attr, char *buf); @@ -266,7 +267,7 @@ static ssize_t raid_bytes_show(struct kobject *kobj, { struct btrfs_space_info *sinfo = to_space_info(kobj->parent); struct btrfs_block_group_cache *block_group; - int index = kobj - sinfo->block_group_kobjs; + int index = to_raid_kobj(kobj)->raid_type; u64 val = 0; down_read(&sinfo->groups_sem); @@ -288,7 +289,7 @@ static struct attribute *raid_attributes[] = { static void release_raid_kobj(struct kobject *kobj) { - kobject_put(kobj->parent); + kfree(to_raid_kobj(kobj)); } struct kobj_type btrfs_raid_ktype = { @@ -374,11 +375,8 @@ static ssize_t btrfs_label_store(struct kobject *kobj, struct btrfs_root *root = fs_info->fs_root; int ret; - if (len >= BTRFS_LABEL_SIZE) { - pr_err("BTRFS: unable to set label with more than %d bytes\n", - BTRFS_LABEL_SIZE - 1); + if (len >= BTRFS_LABEL_SIZE) return -EINVAL; - } trans = btrfs_start_transaction(root, 0); if (IS_ERR(trans)) @@ -396,8 +394,48 @@ 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, }; |