Commit 64cfaef6 authored by Qu Wenruo's avatar Qu Wenruo Committed by David Sterba

btrfs: qgroup: Introduce function to convert META_PREALLOC into META_PERTRANS

For meta_prealloc reservation users, after btrfs_join_transaction()
caller will modify tree so part (or even all) meta_prealloc reservation
should be converted to meta_pertrans until transaction commit time.

This patch introduces a new function,
btrfs_qgroup_convert_reserved_meta() to do this for META_PREALLOC
reservation user.
Signed-off-by: default avatarQu Wenruo <wqu@suse.com>
Signed-off-by: default avatarDavid Sterba <dsterba@suse.com>
parent e1211d0e
...@@ -3134,6 +3134,62 @@ void __btrfs_qgroup_free_meta(struct btrfs_root *root, int num_bytes, ...@@ -3134,6 +3134,62 @@ void __btrfs_qgroup_free_meta(struct btrfs_root *root, int num_bytes,
btrfs_qgroup_free_refroot(fs_info, root->objectid, num_bytes, type); btrfs_qgroup_free_refroot(fs_info, root->objectid, num_bytes, type);
} }
static void qgroup_convert_meta(struct btrfs_fs_info *fs_info, u64 ref_root,
int num_bytes)
{
struct btrfs_root *quota_root = fs_info->quota_root;
struct btrfs_qgroup *qgroup;
struct ulist_node *unode;
struct ulist_iterator uiter;
int ret = 0;
if (num_bytes == 0)
return;
if (!quota_root)
return;
spin_lock(&fs_info->qgroup_lock);
qgroup = find_qgroup_rb(fs_info, ref_root);
if (!qgroup)
goto out;
ulist_reinit(fs_info->qgroup_ulist);
ret = ulist_add(fs_info->qgroup_ulist, qgroup->qgroupid,
(uintptr_t)qgroup, GFP_ATOMIC);
if (ret < 0)
goto out;
ULIST_ITER_INIT(&uiter);
while ((unode = ulist_next(fs_info->qgroup_ulist, &uiter))) {
struct btrfs_qgroup *qg;
struct btrfs_qgroup_list *glist;
qg = unode_aux_to_qgroup(unode);
qgroup_rsv_release(fs_info, qg, num_bytes,
BTRFS_QGROUP_RSV_META_PREALLOC);
qgroup_rsv_add(fs_info, qg, num_bytes,
BTRFS_QGROUP_RSV_META_PERTRANS);
list_for_each_entry(glist, &qg->groups, next_group) {
ret = ulist_add(fs_info->qgroup_ulist,
glist->group->qgroupid,
(uintptr_t)glist->group, GFP_ATOMIC);
if (ret < 0)
goto out;
}
}
out:
spin_unlock(&fs_info->qgroup_lock);
}
void btrfs_qgroup_convert_reserved_meta(struct btrfs_root *root, int num_bytes)
{
struct btrfs_fs_info *fs_info = root->fs_info;
if (!test_bit(BTRFS_FS_QUOTA_ENABLED, &fs_info->flags) ||
!is_fstree(root->objectid))
return;
qgroup_convert_meta(fs_info, root->objectid, num_bytes);
}
/* /*
* Check qgroup reserved space leaking, normally at destroy inode * Check qgroup reserved space leaking, normally at destroy inode
* time * time
......
...@@ -332,5 +332,13 @@ static inline void btrfs_qgroup_free_meta_prealloc(struct btrfs_root *root, ...@@ -332,5 +332,13 @@ static inline void btrfs_qgroup_free_meta_prealloc(struct btrfs_root *root,
*/ */
void btrfs_qgroup_free_meta_all_pertrans(struct btrfs_root *root); void btrfs_qgroup_free_meta_all_pertrans(struct btrfs_root *root);
/*
* Convert @num_bytes of META_PREALLOCATED reservation to META_PERTRANS.
*
* This is called when preallocated meta reservation needs to be used.
* Normally after btrfs_join_transaction() call.
*/
void btrfs_qgroup_convert_reserved_meta(struct btrfs_root *root, int num_bytes);
void btrfs_qgroup_check_reserved_leak(struct inode *inode); void btrfs_qgroup_check_reserved_leak(struct inode *inode);
#endif /* __BTRFS_QGROUP__ */ #endif /* __BTRFS_QGROUP__ */
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