[Qemu-devel] [RFC PATCH RDMA support v1: 06/13] implementation of new QEMUFileOps hooks

[mrhines@linux.vnet.ibm.com]

From: "Michael R. Hines" <mrhines@us.ibm.com>

These are the actual definitions of the accessor methods
which call out to QEMUFileOps hooks during the RAM iteration
faces. These hooks are accessed by arch_init.c,
which comes later in the patch series.

Signed-off-by: Michael R. Hines <mrhines@us.ibm.com>
---
 savevm.c |   78 ++++++++++++++++++++++++++++++++++++++++++++++++++++++--------
 1 file changed, 69 insertions(+), 9 deletions(-)

diff --git a/savevm.c b/savevm.c
index b1d8988..0a20e65 100644
--- a/savevm.c
+++ b/savevm.c
@@ -409,16 +409,24 @@ static const QEMUFileOps socket_write_ops = {
     .close =      socket_close
 };
 
-QEMUFile *qemu_fopen_socket(int fd, const char *mode)
+bool qemu_file_mode_is_not_valid(const char * mode)
 {
-    QEMUFileSocket *s = g_malloc0(sizeof(QEMUFileSocket));
-
     if (mode == NULL ||
         (mode[0] != 'r' && mode[0] != 'w') ||
         mode[1] != 'b' || mode[2] != 0) {
         fprintf(stderr, "qemu_fopen: Argument validity check failed\n");
-        return NULL;
+        return true;
     }
+    
+    return false;
+}
+
+QEMUFile *qemu_fopen_socket(int fd, const char *mode)
+{
+    QEMUFileSocket *s = g_malloc0(sizeof(QEMUFileSocket));
+
+    if(qemu_file_mode_is_not_valid(mode))
+	return NULL;
 
     s->fd = fd;
     if (mode[0] == 'w') {
@@ -434,12 +442,8 @@ QEMUFile *qemu_fopen(const char *filename, const char *mode)
 {
     QEMUFileStdio *s;
 
-    if (mode == NULL ||
-	(mode[0] != 'r' && mode[0] != 'w') ||
-	mode[1] != 'b' || mode[2] != 0) {
-        fprintf(stderr, "qemu_fopen: Argument validity check failed\n");
+    if(qemu_file_mode_is_not_valid(mode))
         return NULL;
-    }
 
     s = g_malloc0(sizeof(QEMUFileStdio));
 
@@ -554,6 +558,62 @@ static void qemu_fflush(QEMUFile *f)
     }
 }
 
+void ram_control_before_iterate(QEMUFile *f, uint32_t flags)
+{
+    int ret = 0;
+
+    if (f->ops->before_ram_iterate) {
+        qemu_fflush(f);
+        ret = f->ops->before_ram_iterate(f, f->opaque, flags);
+        if (ret < 0)
+            qemu_file_set_error(f, ret);
+    }
+}
+
+void ram_control_after_iterate(QEMUFile *f, uint32_t flags)
+{
+    int ret = 0;
+
+    if (f->ops->after_ram_iterate) {
+        qemu_fflush(f);
+        ret = f->ops->after_ram_iterate(f, f->opaque, flags);
+        if (ret < 0)
+            qemu_file_set_error(f, ret);
+    }
+}
+
+void ram_control_load_hook(QEMUFile *f, uint32_t flags)
+{
+    int ret = 0;
+
+    if (f->ops->hook_ram_load) {
+        qemu_fflush(f);
+        ret = f->ops->hook_ram_load(f, f->opaque, flags);
+        if (ret < 0)
+            qemu_file_set_error(f, ret);
+    }
+}
+
+size_t ram_control_save_page(QEMUFile *f, ram_addr_t block_offset, 
+                                    ram_addr_t offset, int cont, 
+                                    size_t size, bool zero)
+{
+    if (f->ops->save_page) {
+        size_t bytes;
+
+        qemu_fflush(f);
+
+        bytes = f->ops->save_page(f, f->opaque, block_offset, offset, cont, size, zero);
+
+        if (bytes > 0)
+            f->pos += bytes;
+
+        return bytes;
+    }
+
+    return -ENOTSUP;
+}
+
 static void qemu_fill_buffer(QEMUFile *f)
 {
     int len;
-- 
1.7.10.4