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Commit 3a6cad90 authored by Stefan Behrens's avatar Stefan Behrens Committed by Josef Bacik
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Btrfs: explicitly use global_block_rsv for quota_tree 



The quota_tree was set up to use the empty_block_rsv before
which would be problematic when the filesystem is filled up
and ENOSPC happens during internal operations while the quota
tree is updated and COWed (when the btrfs_qgroup_info_item
items) are written. In fact, use_block_rsv() which is used
in btrfs_cow_block() falls back to the global_block_rsv in
this case. But just in order to make it more clear what is
happening, change it to explicitly use the global_block_rsv.

Signed-off-by: default avatarStefan Behrens <sbehrens@giantdisaster.de>
Signed-off-by: default avatarJosef Bacik <jbacik@fusionio.com>
parent 17a5adcc

fs/btrfs/extent-tree.c

+2 −0
Original line number Diff line number Diff line
@@ -4564,6 +4564,8 @@ static void init_global_block_rsv(struct btrfs_fs_info *fs_info) 
	fs_info->csum_root->block_rsv = &fs_info->global_block_rsv;

	fs_info->dev_root->block_rsv = &fs_info->global_block_rsv;

	fs_info->tree_root->block_rsv = &fs_info->global_block_rsv;

	if (fs_info->quota_root)

		fs_info->quota_root->block_rsv = &fs_info->global_block_rsv;

	fs_info->chunk_root->block_rsv = &fs_info->chunk_block_rsv;



	update_global_block_rsv(fs_info);