Quota fixes for e2fsprogs

index 23717f03f428..a49aa6ac8c2f 100644
@@ -41,6 +41,68 @@ struct quotafile_ops quotafile_ops_2 = {
 	.report		= v2_report,
 };
 
+/*
+ * Copy dquot from disk to memory
+ */
+static void v2r0_disk2memdqblk(struct dquot *dquot, void *dp)
+{
+	struct util_dqblk *m = &dquot->dq_dqb;
+	struct v2r0_disk_dqblk *d = dp, empty;
+
+	dquot->dq_id = ext2fs_le32_to_cpu(d->dqb_id);
+	m->dqb_ihardlimit = ext2fs_le32_to_cpu(d->dqb_ihardlimit);
+	m->dqb_isoftlimit = ext2fs_le32_to_cpu(d->dqb_isoftlimit);
+	m->dqb_bhardlimit = ext2fs_le32_to_cpu(d->dqb_bhardlimit);
+	m->dqb_bsoftlimit = ext2fs_le32_to_cpu(d->dqb_bsoftlimit);
+	m->dqb_curinodes = ext2fs_le32_to_cpu(d->dqb_curinodes);
+	m->dqb_curspace = ext2fs_le64_to_cpu(d->dqb_curspace);
+	m->dqb_itime = ext2fs_le64_to_cpu(d->dqb_itime);
+	m->dqb_btime = ext2fs_le64_to_cpu(d->dqb_btime);
+
+	memset(&empty, 0, sizeof(struct v2r0_disk_dqblk));
+	empty.dqb_itime = ext2fs_cpu_to_le64(1);
+	if (!memcmp(&empty, dp, sizeof(struct v2r0_disk_dqblk)))
+		m->dqb_itime = 0;
+}
+
+/*
+ * Copy dquot from memory to disk
+ */
+static void v2r0_mem2diskdqblk(void *dp, struct dquot *dquot)
+{
+	struct util_dqblk *m = &dquot->dq_dqb;
+	struct v2r0_disk_dqblk *d = dp;
+
+	d->dqb_ihardlimit = ext2fs_cpu_to_le32(m->dqb_ihardlimit);
+	d->dqb_isoftlimit = ext2fs_cpu_to_le32(m->dqb_isoftlimit);
+	d->dqb_bhardlimit = ext2fs_cpu_to_le32(m->dqb_bhardlimit);
+	d->dqb_bsoftlimit = ext2fs_cpu_to_le32(m->dqb_bsoftlimit);
+	d->dqb_curinodes = ext2fs_cpu_to_le32(m->dqb_curinodes);
+	d->dqb_curspace = ext2fs_cpu_to_le64(m->dqb_curspace);
+	d->dqb_itime = ext2fs_cpu_to_le64(m->dqb_itime);
+	d->dqb_btime = ext2fs_cpu_to_le64(m->dqb_btime);
+	d->dqb_id = ext2fs_cpu_to_le32(dquot->dq_id);
+	if (qtree_entry_unused(&dquot->dq_h->qh_info.u.v2_mdqi.dqi_qtree, dp))
+		d->dqb_itime = ext2fs_cpu_to_le64(1);
+}
+
+static int v2r0_is_id(void *dp, struct dquot *dquot)
+{
+	struct v2r0_disk_dqblk *d = dp;
+	struct qtree_mem_dqinfo *info =
+			&dquot->dq_h->qh_info.u.v2_mdqi.dqi_qtree;
+
+	if (qtree_entry_unused(info, dp))
+		return 0;
+	return ext2fs_le32_to_cpu(d->dqb_id) == dquot->dq_id;
+}
+
+static struct qtree_fmt_operations v2r0_fmt_ops = {
+	.mem2disk_dqblk = v2r0_mem2diskdqblk,
+	.disk2mem_dqblk = v2r0_disk2memdqblk,
+	.is_id = v2r0_is_id,
+};
+
 /*
  * Copy dquot from disk to memory
  */

@@ -164,7 +226,8 @@ static int v2_check_file(struct quota_handle *h, int type, int fmt)
 		log_err("Your quota file is stored in wrong endianity");
 		return 0;
 	}
-	if (V2_VERSION != ext2fs_le32_to_cpu(dqh.dqh_version))
+	if (V2_VERSION_R0 != ext2fs_le32_to_cpu(dqh.dqh_version) &&
+	    V2_VERSION_R1 != ext2fs_le32_to_cpu(dqh.dqh_version))
 		return 0;
 	return 1;
 }

@@ -174,13 +237,25 @@ static int v2_check_file(struct quota_handle *h, int type, int fmt)
  */
 static int v2_init_io(struct quota_handle *h)
 {
+	struct v2_disk_dqheader dqh;
 	struct v2_disk_dqinfo ddqinfo;
 	struct v2_mem_dqinfo *info;
 	__u64 filesize;
+	int version;
 
-	h->qh_info.u.v2_mdqi.dqi_qtree.dqi_entry_size =
-		sizeof(struct v2r1_disk_dqblk);
-	h->qh_info.u.v2_mdqi.dqi_qtree.dqi_ops = &v2r1_fmt_ops;
+	if (!v2_read_header(h, &dqh))
+		return -1;
+	version = ext2fs_le32_to_cpu(dqh.dqh_version);
+
+	if (version == V2_VERSION_R0) {
+		h->qh_info.u.v2_mdqi.dqi_qtree.dqi_entry_size =
+			sizeof(struct v2r0_disk_dqblk);
+		h->qh_info.u.v2_mdqi.dqi_qtree.dqi_ops = &v2r0_fmt_ops;
+	} else {
+		h->qh_info.u.v2_mdqi.dqi_qtree.dqi_entry_size =
+			sizeof(struct v2r1_disk_dqblk);
+		h->qh_info.u.v2_mdqi.dqi_qtree.dqi_ops = &v2r1_fmt_ops;
+	}
 
 	/* Read information about quotafile */
 	if (h->e2fs_read(&h->qh_qf, V2_DQINFOOFF, &ddqinfo,

@@ -231,7 +306,7 @@ static int v2_new_io(struct quota_handle *h)
 
 	/* Write basic quota header */
 	ddqheader.dqh_magic = ext2fs_cpu_to_le32(file_magics[h->qh_type]);
-	ddqheader.dqh_version = ext2fs_cpu_to_le32(V2_VERSION);
+	ddqheader.dqh_version = ext2fs_cpu_to_le32(V2_VERSION_R1);
 	if (h->e2fs_write(&h->qh_qf, 0, &ddqheader, sizeof(ddqheader)) !=
 			sizeof(ddqheader))
 		return -1;

index de2db2785cb0..35054cafaa23 100644
@@ -13,7 +13,8 @@
 /* Offset of info header in file */
 #define V2_DQINFOOFF		sizeof(struct v2_disk_dqheader)
 /* Supported version of quota-tree format */
-#define V2_VERSION 1
+#define V2_VERSION_R1 1
+#define V2_VERSION_R0 0
 
 struct v2_disk_dqheader {
 	__le32 dqh_magic;	/* Magic number identifying file */

@@ -36,6 +37,20 @@ struct v2_disk_dqinfo {
 					 * free entry */
 } __attribute__ ((packed));
 
+struct v2r0_disk_dqblk {
+	__le32 dqb_id;	/* id this quota applies to */
+	__le32 dqb_ihardlimit;	/* absolute limit on allocated inodes */
+	__le32 dqb_isoftlimit;	/* preferred inode limit */
+	__le32 dqb_curinodes;	/* current # allocated inodes */
+	__le32 dqb_bhardlimit;	/* absolute limit on disk space
+					 * (in QUOTABLOCK_SIZE) */
+	__le32 dqb_bsoftlimit;	/* preferred limit on disk space
+					 * (in QUOTABLOCK_SIZE) */
+	__le64 dqb_curspace;	/* current space occupied (in bytes) */
+	__le64 dqb_btime;	/* time limit for excessive disk use */
+	__le64 dqb_itime;	/* time limit for excessive inode use */
+} __attribute__ ((packed));
+
 struct v2r1_disk_dqblk {
 	__le32 dqb_id;	/* id this quota applies to */
 	__le32 dqb_pad;

index fbc3833aee98..34ab632fb81c 100644
@@ -569,14 +569,14 @@ static int scan_dquots_callback(struct dquot *dquot, void *cb_data)
  */
 static errcode_t quota_read_all_dquots(struct quota_handle *qh,
                                        quota_ctx_t qctx,
-				       int update_limits EXT2FS_ATTR((unused)))
+				       int update_limits)
 {
 	struct scan_dquots_data scan_data;
 
 	scan_data.quota_dict = qctx->quota_dict[qh->qh_type];
 	scan_data.check_consistency = 0;
-	scan_data.update_limits = 0;
-	scan_data.update_usage = 1;
+	scan_data.update_limits = update_limits;
+	scan_data.update_usage = 0;
 
 	return qh->qh_ops->scan_dquots(qh, scan_dquots_callback, &scan_data);
 }