From: Qu Wenruo wqu@suse.com
stable inclusion from stable-v6.6.9 commit 1a80999ba3766b14f4b2f6128643816ea77e5c52 category: bugfix bugzilla: https://gitee.com/openeuler/kernel/issues/I8SU2D
Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=...
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[ Upstream commit 0913445082496c2b29668ee26521401b273838b8 ]
With the new qgroup_iterator_add() and qgroup_iterator_clean(), we can get rid of the ulist and its GFP_ATOMIC memory allocation.
Reviewed-by: Boris Burkov boris@bur.io Signed-off-by: Qu Wenruo wqu@suse.com Reviewed-by: David Sterba dsterba@suse.com Signed-off-by: David Sterba dsterba@suse.com Stable-dep-of: b321a52cce06 ("btrfs: free qgroup pertrans reserve on transaction abort") Signed-off-by: Sasha Levin sashal@kernel.org Signed-off-by: Zheng Zengkai zhengzengkai@huawei.com --- fs/btrfs/qgroup.c | 32 ++++++++++---------------------- 1 file changed, 10 insertions(+), 22 deletions(-)
diff --git a/fs/btrfs/qgroup.c b/fs/btrfs/qgroup.c index 32e5defe4eff..0d2212fa0ce8 100644 --- a/fs/btrfs/qgroup.c +++ b/fs/btrfs/qgroup.c @@ -4106,9 +4106,7 @@ static void qgroup_convert_meta(struct btrfs_fs_info *fs_info, u64 ref_root, int num_bytes) { struct btrfs_qgroup *qgroup; - struct ulist_node *unode; - struct ulist_iterator uiter; - int ret = 0; + LIST_HEAD(qgroup_list);
if (num_bytes == 0) return; @@ -4119,31 +4117,21 @@ static void qgroup_convert_meta(struct btrfs_fs_info *fs_info, u64 ref_root, 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, - qgroup_to_aux(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_iterator_add(&qgroup_list, qgroup); + list_for_each_entry(qgroup, &qgroup_list, iterator) { + struct btrfs_qgroup_list *glist;
- qgroup_rsv_release(fs_info, qg, num_bytes, + qgroup_rsv_release(fs_info, qgroup, num_bytes, BTRFS_QGROUP_RSV_META_PREALLOC); - qgroup_rsv_add(fs_info, qg, num_bytes, + qgroup_rsv_add(fs_info, qgroup, 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, - qgroup_to_aux(glist->group), GFP_ATOMIC); - if (ret < 0) - goto out; - } + + list_for_each_entry(glist, &qgroup->groups, next_group) + qgroup_iterator_add(&qgroup_list, glist->group); } out: + qgroup_iterator_clean(&qgroup_list); spin_unlock(&fs_info->qgroup_lock); }