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btrfs: factor out sysfs code for deleting block group and space infos

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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@suse.com>
This commit is contained in:
David Sterba 2019-08-01 18:50:16 +02:00
parent 5b28692e0c
commit b5865babb7
3 changed files with 24 additions and 13 deletions
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14
fs/btrfs/extent-tree.c
View File

@ -7539,8 +7539,6 @@ 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);
@ -7554,17 +7552,7 @@ 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;
}

22
fs/btrfs/sysfs.c
View File

@ -800,6 +800,28 @@ 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) {

1
fs/btrfs/sysfs.h
View File

@ -98,5 +98,6 @@ void btrfs_sysfs_remove_mounted(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