diff options
| -rw-r--r-- | fs/btrfs/ctree.h | 8 | ||||
| -rw-r--r-- | fs/btrfs/extent-tree.c | 39 | ||||
| -rw-r--r-- | fs/btrfs/sysfs.c | 5 |
3 files changed, 36 insertions, 16 deletions
diff --git a/fs/btrfs/ctree.h b/fs/btrfs/ctree.h index 02895a126ab9..af523d695432 100644 --- a/fs/btrfs/ctree.h +++ b/fs/btrfs/ctree.h @@ -1123,6 +1123,12 @@ struct btrfs_qgroup_limit_item { __le64 rsv_excl; } __attribute__ ((__packed__)); +/* For raid type sysfs entries */ +struct raid_kobject { + int raid_type; + struct kobject kobj; +}; + struct btrfs_space_info { spinlock_t lock; @@ -1173,7 +1179,7 @@ struct btrfs_space_info { wait_queue_head_t wait; struct kobject kobj; - struct kobject block_group_kobjs[BTRFS_NR_RAID_TYPES]; + struct kobject *block_group_kobjs[BTRFS_NR_RAID_TYPES]; }; #define BTRFS_BLOCK_RSV_GLOBAL 1 diff --git a/fs/btrfs/extent-tree.c b/fs/btrfs/extent-tree.c index 6caddd5970e4..fafb3e53ecde 100644 --- a/fs/btrfs/extent-tree.c +++ b/fs/btrfs/extent-tree.c @@ -3497,10 +3497,8 @@ static int update_space_info(struct btrfs_fs_info *info, u64 flags, return ret; } - for (i = 0; i < BTRFS_NR_RAID_TYPES; i++) { + for (i = 0; i < BTRFS_NR_RAID_TYPES; i++) INIT_LIST_HEAD(&found->block_groups[i]); - kobject_init(&found->block_group_kobjs[i], &btrfs_raid_ktype); - } init_rwsem(&found->groups_sem); spin_lock_init(&found->lock); found->flags = flags & BTRFS_BLOCK_GROUP_TYPE_MASK; @@ -8586,8 +8584,9 @@ int btrfs_free_block_groups(struct btrfs_fs_info *info) list_del(&space_info->list); for (i = 0; i < BTRFS_NR_RAID_TYPES; i++) { struct kobject *kobj; - kobj = &space_info->block_group_kobjs[i]; - if (kobj->parent) { + kobj = space_info->block_group_kobjs[i]; + space_info->block_group_kobjs[i] = NULL; + if (kobj) { kobject_del(kobj); kobject_put(kobj); } @@ -8611,17 +8610,26 @@ static void __link_block_group(struct btrfs_space_info *space_info, up_write(&space_info->groups_sem); if (first) { - struct kobject *kobj = &space_info->block_group_kobjs[index]; + struct raid_kobject *rkobj; int ret; - kobject_get(&space_info->kobj); /* put in release */ - ret = kobject_add(kobj, &space_info->kobj, "%s", - get_raid_name(index)); + rkobj = kzalloc(sizeof(*rkobj), GFP_NOFS); + if (!rkobj) + goto out_err; + rkobj->raid_type = index; + kobject_init(&rkobj->kobj, &btrfs_raid_ktype); + ret = kobject_add(&rkobj->kobj, &space_info->kobj, + "%s", get_raid_name(index)); if (ret) { - pr_warn("BTRFS: failed to add kobject for block cache. ignoring.\n"); - kobject_put(&space_info->kobj); + kobject_put(&rkobj->kobj); + goto out_err; } + space_info->block_group_kobjs[index] = &rkobj->kobj; } + + return; +out_err: + pr_warn("BTRFS: failed to add kobject for block cache. ignoring.\n"); } static struct btrfs_block_group_cache * @@ -8956,6 +8964,7 @@ int btrfs_remove_block_group(struct btrfs_trans_handle *trans, struct btrfs_root *tree_root = root->fs_info->tree_root; struct btrfs_key key; struct inode *inode; + struct kobject *kobj = NULL; int ret; int index; int factor; @@ -9055,11 +9064,15 @@ int btrfs_remove_block_group(struct btrfs_trans_handle *trans, */ list_del_init(&block_group->list); if (list_empty(&block_group->space_info->block_groups[index])) { - kobject_del(&block_group->space_info->block_group_kobjs[index]); - kobject_put(&block_group->space_info->block_group_kobjs[index]); + kobj = block_group->space_info->block_group_kobjs[index]; + block_group->space_info->block_group_kobjs[index] = NULL; clear_avail_alloc_bits(root->fs_info, block_group->flags); } up_write(&block_group->space_info->groups_sem); + if (kobj) { + kobject_del(kobj); + kobject_put(kobj); + } if (block_group->cached == BTRFS_CACHE_STARTED) wait_block_group_cache_done(block_group); diff --git a/fs/btrfs/sysfs.c b/fs/btrfs/sysfs.c index c0dfda5644f2..df39458f1487 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 = { |