[PATCH 09/13] btrfs: factor out sysfs code for deleting block group and space infos

[David Sterba <dsterba@xxxxxxxx>]

The helpers to create block group and space info directories already
live in sysfs.c, move the deletion part there too.

Signed-off-by: David Sterba <dsterba@xxxxxxxx>
---
 fs/btrfs/extent-tree.c | 14 +-------------
 fs/btrfs/sysfs.c       | 22 ++++++++++++++++++++++
 fs/btrfs/sysfs.h       |  1 +
 3 files changed, 24 insertions(+), 13 deletions(-)

diff --git a/fs/btrfs/extent-tree.c b/fs/btrfs/extent-tree.c
index 8ac496fddc59..3a711f5e7919 100644
--- a/fs/btrfs/extent-tree.c
+++ b/fs/btrfs/extent-tree.c
@@ -7744,8 +7744,6 @@ int btrfs_free_block_groups(struct btrfs_fs_info *info)
 	btrfs_release_global_block_rsv(info);
 
 	while (!list_empty(&info->space_info)) {
-		int i;
-
 		space_info = list_entry(info->space_info.next,
 					struct btrfs_space_info,
 					list);
@@ -7759,17 +7757,7 @@ int btrfs_free_block_groups(struct btrfs_fs_info *info)
 			    space_info->bytes_may_use > 0))
 			btrfs_dump_space_info(info, space_info, 0, 0);
 		list_del(&space_info->list);
-		for (i = 0; i < BTRFS_NR_RAID_TYPES; i++) {
-			struct kobject *kobj;
-			kobj = space_info->block_group_kobjs[i];
-			space_info->block_group_kobjs[i] = NULL;
-			if (kobj) {
-				kobject_del(kobj);
-				kobject_put(kobj);
-			}
-		}
-		kobject_del(&space_info->kobj);
-		kobject_put(&space_info->kobj);
+		btrfs_sysfs_remove_space_info(space_info);
 	}
 	return 0;
 }
diff --git a/fs/btrfs/sysfs.c b/fs/btrfs/sysfs.c
index 0f7e97ceec4e..2490144863ae 100644
--- a/fs/btrfs/sysfs.c
+++ b/fs/btrfs/sysfs.c
@@ -789,6 +789,28 @@ void btrfs_sysfs_add_block_group_type(struct btrfs_block_group_cache *cache)
 	space_info->block_group_kobjs[index] = &rkobj->kobj;
 }
 
+/*
+ * Remove sysfs directories for all block group types of a given space info and
+ * the space info as well
+ */
+void btrfs_sysfs_remove_space_info(struct btrfs_space_info *space_info)
+{
+	int i;
+
+	for (i = 0; i < BTRFS_NR_RAID_TYPES; i++) {
+		struct kobject *kobj;
+
+		kobj = space_info->block_group_kobjs[i];
+		space_info->block_group_kobjs[i] = NULL;
+		if (kobj) {
+			kobject_del(kobj);
+			kobject_put(kobj);
+		}
+	}
+	kobject_del(&space_info->kobj);
+	kobject_put(&space_info->kobj);
+}
+
 static const char *alloc_name(u64 flags)
 {
 	switch (flags) {
diff --git a/fs/btrfs/sysfs.h b/fs/btrfs/sysfs.h
index 371fa9db5bbd..857710e77775 100644
--- a/fs/btrfs/sysfs.h
+++ b/fs/btrfs/sysfs.h
@@ -105,5 +105,6 @@ void btrfs_add_raid_kobjects(struct btrfs_fs_info *fs_info);
 void btrfs_sysfs_add_block_group_type(struct btrfs_block_group_cache *cache);
 int btrfs_sysfs_add_space_info_type(struct btrfs_fs_info *fs_info,
 				    struct btrfs_space_info *space_info);
+void btrfs_sysfs_remove_space_info(struct btrfs_space_info *space_info);
 
 #endif
-- 
2.22.0