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From 71ef58e93b4a9aafa838117bdaeebc72c2b826c3 Mon Sep 17 00:00:00 2001
From: Jeffrey Cody <jcody@redhat.com>
Date: Wed, 20 Nov 2013 19:44:02 +0100
Subject: [PATCH 19/25] block: vhdx - move more endian translations to vhdx-endian.c

RH-Author: Jeffrey Cody <jcody@redhat.com>
Message-id: <e18245e69af41489c6172765a45640076f8b2379.1384975172.git.jcody@redhat.com>
Patchwork-id: 55812
O-Subject: [RHEL7 qemu-kvm PATCH 19/26] block: vhdx - move more endian translations to vhdx-endian.c
Bugzilla: 879234
RH-Acked-by: Stefan Hajnoczi <stefanha@redhat.com>
RH-Acked-by: Paolo Bonzini <pbonzini@redhat.com>
RH-Acked-by: Fam Zheng <famz@redhat.com>

In preparation for vhdx_create(), move more endian translation
functions out to vhdx-endian.c.

Signed-off-by: Jeff Cody <jcody@redhat.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
(cherry picked from commit c325ee1de84dde5b2a90c30e1b788defa31c5d53)
---
 block/vhdx-endian.c | 75 +++++++++++++++++++++++++++++++++++++++++++++++++++++
 block/vhdx.c        | 20 +++-----------
 block/vhdx.h        |  9 ++++++-
 3 files changed, 87 insertions(+), 17 deletions(-)

Signed-off-by: Miroslav Rezanina <mrezanin@redhat.com>
---
 block/vhdx-endian.c |   75 +++++++++++++++++++++++++++++++++++++++++++++++++++
 block/vhdx.c        |   20 +++-----------
 block/vhdx.h        |    9 +++++-
 3 files changed, 87 insertions(+), 17 deletions(-)

diff --git a/block/vhdx-endian.c b/block/vhdx-endian.c
index 3e93e63..fe879ed 100644
--- a/block/vhdx-endian.c
+++ b/block/vhdx-endian.c
@@ -139,3 +139,78 @@ void vhdx_log_entry_hdr_le_export(VHDXLogEntryHeader *hdr)
 }
 
 
+/* Region table entries */
+void vhdx_region_header_le_import(VHDXRegionTableHeader *hdr)
+{
+    assert(hdr != NULL);
+
+    le32_to_cpus(&hdr->signature);
+    le32_to_cpus(&hdr->checksum);
+    le32_to_cpus(&hdr->entry_count);
+}
+
+void vhdx_region_header_le_export(VHDXRegionTableHeader *hdr)
+{
+    assert(hdr != NULL);
+
+    cpu_to_le32s(&hdr->signature);
+    cpu_to_le32s(&hdr->checksum);
+    cpu_to_le32s(&hdr->entry_count);
+}
+
+void vhdx_region_entry_le_import(VHDXRegionTableEntry *e)
+{
+    assert(e != NULL);
+
+    leguid_to_cpus(&e->guid);
+    le64_to_cpus(&e->file_offset);
+    le32_to_cpus(&e->length);
+    le32_to_cpus(&e->data_bits);
+}
+
+void vhdx_region_entry_le_export(VHDXRegionTableEntry *e)
+{
+    assert(e != NULL);
+
+    cpu_to_leguids(&e->guid);
+    cpu_to_le64s(&e->file_offset);
+    cpu_to_le32s(&e->length);
+    cpu_to_le32s(&e->data_bits);
+}
+
+
+/* Metadata headers & table */
+void vhdx_metadata_header_le_import(VHDXMetadataTableHeader *hdr)
+{
+    assert(hdr != NULL);
+
+    le64_to_cpus(&hdr->signature);
+    le16_to_cpus(&hdr->entry_count);
+}
+
+void vhdx_metadata_header_le_export(VHDXMetadataTableHeader *hdr)
+{
+    assert(hdr != NULL);
+
+    cpu_to_le64s(&hdr->signature);
+    cpu_to_le16s(&hdr->entry_count);
+}
+
+void vhdx_metadata_entry_le_import(VHDXMetadataTableEntry *e)
+{
+    assert(e != NULL);
+
+    leguid_to_cpus(&e->item_id);
+    le32_to_cpus(&e->offset);
+    le32_to_cpus(&e->length);
+    le32_to_cpus(&e->data_bits);
+}
+void vhdx_metadata_entry_le_export(VHDXMetadataTableEntry *e)
+{
+    assert(e != NULL);
+
+    cpu_to_leguids(&e->item_id);
+    cpu_to_le32s(&e->offset);
+    cpu_to_le32s(&e->length);
+    cpu_to_le32s(&e->data_bits);
+}
diff --git a/block/vhdx.c b/block/vhdx.c
index 97099aa..9d51176 100644
--- a/block/vhdx.c
+++ b/block/vhdx.c
@@ -472,10 +472,7 @@ static int vhdx_open_region_tables(BlockDriverState *bs, BDRVVHDXState *s)
         goto fail;
     }
     memcpy(&s->rt, buffer, sizeof(s->rt));
-    le32_to_cpus(&s->rt.signature);
-    le32_to_cpus(&s->rt.checksum);
-    le32_to_cpus(&s->rt.entry_count);
-    le32_to_cpus(&s->rt.reserved);
+    vhdx_region_header_le_import(&s->rt);
     offset += sizeof(s->rt);
 
     if (!vhdx_checksum_is_valid(buffer, VHDX_HEADER_BLOCK_SIZE, 4) ||
@@ -494,10 +491,7 @@ static int vhdx_open_region_tables(BlockDriverState *bs, BDRVVHDXState *s)
         memcpy(&rt_entry, buffer + offset, sizeof(rt_entry));
         offset += sizeof(rt_entry);
 
-        leguid_to_cpus(&rt_entry.guid);
-        le64_to_cpus(&rt_entry.file_offset);
-        le32_to_cpus(&rt_entry.length);
-        le32_to_cpus(&rt_entry.data_bits);
+        vhdx_region_entry_le_import(&rt_entry);
 
         /* check for region overlap between these entries, and any
          * other memory regions in the file */
@@ -587,9 +581,7 @@ static int vhdx_parse_metadata(BlockDriverState *bs, BDRVVHDXState *s)
     memcpy(&s->metadata_hdr, buffer, sizeof(s->metadata_hdr));
     offset += sizeof(s->metadata_hdr);
 
-    le64_to_cpus(&s->metadata_hdr.signature);
-    le16_to_cpus(&s->metadata_hdr.reserved);
-    le16_to_cpus(&s->metadata_hdr.entry_count);
+    vhdx_metadata_header_le_import(&s->metadata_hdr);
 
     if (memcmp(&s->metadata_hdr.signature, "metadata", 8)) {
         ret = -EINVAL;
@@ -608,11 +600,7 @@ static int vhdx_parse_metadata(BlockDriverState *bs, BDRVVHDXState *s)
         memcpy(&md_entry, buffer + offset, sizeof(md_entry));
         offset += sizeof(md_entry);
 
-        leguid_to_cpus(&md_entry.item_id);
-        le32_to_cpus(&md_entry.offset);
-        le32_to_cpus(&md_entry.length);
-        le32_to_cpus(&md_entry.data_bits);
-        le32_to_cpus(&md_entry.reserved2);
+        vhdx_metadata_entry_le_import(&md_entry);
 
         if (guid_eq(md_entry.item_id, file_param_guid)) {
             if (s->metadata_entries.present & META_FILE_PARAMETER_PRESENT) {
diff --git a/block/vhdx.h b/block/vhdx.h
index 7deb7fd..0acad37 100644
--- a/block/vhdx.h
+++ b/block/vhdx.h
@@ -421,7 +421,14 @@ void vhdx_log_desc_le_export(VHDXLogDescriptor *d);
 void vhdx_log_data_le_export(VHDXLogDataSector *d);
 void vhdx_log_entry_hdr_le_import(VHDXLogEntryHeader *hdr);
 void vhdx_log_entry_hdr_le_export(VHDXLogEntryHeader *hdr);
-
+void vhdx_region_header_le_import(VHDXRegionTableHeader *hdr);
+void vhdx_region_header_le_export(VHDXRegionTableHeader *hdr);
+void vhdx_region_entry_le_import(VHDXRegionTableEntry *e);
+void vhdx_region_entry_le_export(VHDXRegionTableEntry *e);
+void vhdx_metadata_header_le_import(VHDXMetadataTableHeader *hdr);
+void vhdx_metadata_header_le_export(VHDXMetadataTableHeader *hdr);
+void vhdx_metadata_entry_le_import(VHDXMetadataTableEntry *e);
+void vhdx_metadata_entry_le_export(VHDXMetadataTableEntry *e);
 int vhdx_user_visible_write(BlockDriverState *bs, BDRVVHDXState *s);
 
 #endif
-- 
1.7.1