ext4: Convert to generic reserved quota's space management.

This patch also fixes write vs chown race condition.

Acked-by: "Theodore Ts'o" <tytso@mit.edu>
Signed-off-by: Dmitry Monakhov <dmonakhov@openvz.org>
Signed-off-by: Jan Kara <jack@suse.cz>

1 files changed, 5 insertions, 0 deletions

diff --git a/fs/ext4/super.c b/fs/ext4/super.c
index 827bde1f2594..6ed9aa91f27d 100644
--- a/fs/ext4/super.c
+++ b/fs/ext4/super.c
@@ -704,6 +704,9 @@ static struct inode *ext4_alloc_inode(struct super_block *sb)
         ei->i_allocated_meta_blocks = 0;
         ei->i_delalloc_reserved_flag = 0;
         spin_lock_init(&(ei->i_block_reservation_lock));
+#ifdef CONFIG_QUOTA
+        ei->i_reserved_quota = 0;
+#endif
         INIT_LIST_HEAD(&ei->i_aio_dio_complete_list);
         ei->cur_aio_dio = NULL;
         ei->i_sync_tid = 0;
@@ -1014,7 +1017,9 @@ static const struct dquot_operations ext4_quota_operations = {
         .reserve_space  = dquot_reserve_space,
         .claim_space    = dquot_claim_space,
         .release_rsv    = dquot_release_reserved_space,
+#ifdef CONFIG_QUOTA
         .get_reserved_space = ext4_get_reserved_space,
+#endif
         .alloc_inode    = dquot_alloc_inode,
         .free_space     = dquot_free_space,
         .free_inode     = dquot_free_inode,