[Qemu-devel] [PATCH v3 09/32] blockdev: Move qcow probe to its own file

[Colin Lord <clord@redhat.com>]

Isolates qcow probe as part of the modularization process.

Signed-off-by: Colin Lord <clord@redhat.com>
---
 block/Makefile.objs         |  2 +-
 block/probe/qcow.c          | 16 ++++++++++++++++
 block/qcow.c                | 31 ++-----------------------------
 include/block/driver/qcow.h | 21 +++++++++++++++++++++
 include/block/probe.h       |  1 +
 5 files changed, 41 insertions(+), 30 deletions(-)
 create mode 100644 block/probe/qcow.c
 create mode 100644 include/block/driver/qcow.h

diff --git a/block/Makefile.objs b/block/Makefile.objs
index 12607db..9458da8 100644
--- a/block/Makefile.objs
+++ b/block/Makefile.objs
@@ -25,7 +25,7 @@ block-obj-y += write-threshold.o
 
 block-obj-y += crypto.o
 block-obj-y += probe/bochs.o probe/cloop.o probe/luks.o probe/dmg.o
-block-obj-y += probe/parallels.o
+block-obj-y += probe/parallels.o probe/qcow.o
 
 common-obj-y += stream.o
 common-obj-y += commit.o
diff --git a/block/probe/qcow.c b/block/probe/qcow.c
new file mode 100644
index 0000000..6024d11
--- /dev/null
+++ b/block/probe/qcow.c
@@ -0,0 +1,16 @@
+#include "qemu/osdep.h"
+#include "block/block_int.h"
+#include "block/probe.h"
+#include "block/driver/qcow.h"
+
+int qcow_probe(const uint8_t *buf, int buf_size, const char *filename)
+{
+    const QCowHeader *cow_header = (const void *)buf;
+
+    if (buf_size >= sizeof(QCowHeader) &&
+        be32_to_cpu(cow_header->magic) == QCOW_MAGIC &&
+        be32_to_cpu(cow_header->version) == QCOW_VERSION)
+        return 100;
+    else
+        return 0;
+}
diff --git a/block/qcow.c b/block/qcow.c
index 312af52..828749c 100644
--- a/block/qcow.c
+++ b/block/qcow.c
@@ -26,6 +26,8 @@
 #include "qemu-common.h"
 #include "qemu/error-report.h"
 #include "block/block_int.h"
+#include "block/probe.h"
+#include "block/driver/qcow.h"
 #include "sysemu/block-backend.h"
 #include "qemu/module.h"
 #include "qemu/bswap.h"
@@ -37,28 +39,11 @@
 /**************************************************************/
 /* QEMU COW block driver with compression and encryption support */
 
-#define QCOW_MAGIC (('Q' << 24) | ('F' << 16) | ('I' << 8) | 0xfb)
-#define QCOW_VERSION 1
-
 #define QCOW_CRYPT_NONE 0
 #define QCOW_CRYPT_AES  1
 
 #define QCOW_OFLAG_COMPRESSED (1LL << 63)
 
-typedef struct QCowHeader {
-    uint32_t magic;
-    uint32_t version;
-    uint64_t backing_file_offset;
-    uint32_t backing_file_size;
-    uint32_t mtime;
-    uint64_t size; /* in bytes */
-    uint8_t cluster_bits;
-    uint8_t l2_bits;
-    uint16_t padding;
-    uint32_t crypt_method;
-    uint64_t l1_table_offset;
-} QEMU_PACKED QCowHeader;
-
 #define L2_CACHE_SIZE 16
 
 typedef struct BDRVQcowState {
@@ -85,18 +70,6 @@ typedef struct BDRVQcowState {
 
 static int decompress_cluster(BlockDriverState *bs, uint64_t cluster_offset);
 
-static int qcow_probe(const uint8_t *buf, int buf_size, const char *filename)
-{
-    const QCowHeader *cow_header = (const void *)buf;
-
-    if (buf_size >= sizeof(QCowHeader) &&
-        be32_to_cpu(cow_header->magic) == QCOW_MAGIC &&
-        be32_to_cpu(cow_header->version) == QCOW_VERSION)
-        return 100;
-    else
-        return 0;
-}
-
 static int qcow_open(BlockDriverState *bs, QDict *options, int flags,
                      Error **errp)
 {
diff --git a/include/block/driver/qcow.h b/include/block/driver/qcow.h
new file mode 100644
index 0000000..c96ea24
--- /dev/null
+++ b/include/block/driver/qcow.h
@@ -0,0 +1,21 @@
+#ifndef QCOW_H
+#define QCOW_H
+
+#define QCOW_MAGIC (('Q' << 24) | ('F' << 16) | ('I' << 8) | 0xfb)
+#define QCOW_VERSION 1
+
+typedef struct QCowHeader {
+    uint32_t magic;
+    uint32_t version;
+    uint64_t backing_file_offset;
+    uint32_t backing_file_size;
+    uint32_t mtime;
+    uint64_t size; /* in bytes */
+    uint8_t cluster_bits;
+    uint8_t l2_bits;
+    uint16_t padding;
+    uint32_t crypt_method;
+    uint64_t l1_table_offset;
+} QEMU_PACKED QCowHeader;
+
+#endif
diff --git a/include/block/probe.h b/include/block/probe.h
index f8b0984..5230da4 100644
--- a/include/block/probe.h
+++ b/include/block/probe.h
@@ -7,5 +7,6 @@ int block_crypto_probe_luks(const uint8_t *buf, int buf_size,
                             const char *filename);
 int dmg_probe(const uint8_t *buf, int buf_size, const char *filename);
 int parallels_probe(const uint8_t *buf, int buf_size, const char *filename);
+int qcow_probe(const uint8_t *buf, int buf_size, const char *filename);
 
 #endif
-- 
2.5.5