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From b67ef65a1f5d8ceb02ca11c0af92d2c06fd006cb Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Marc-Andr=C3=A9=20Lureau?= <marcandre.lureau@redhat.com>
Date: Wed, 13 Dec 2017 13:38:57 +0100
Subject: [PATCH 26/41] dump-guest-memory: introduce dump_process() helper
 function.
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RH-Author: Marc-André Lureau <marcandre.lureau@redhat.com>
Message-id: <20171213133912.26176-27-marcandre.lureau@redhat.com>
Patchwork-id: 78375
O-Subject: [RHEL-7.5 qemu-kvm PATCH v3 26/41] dump-guest-memory: introduce dump_process() helper function.
Bugzilla: 1411490
RH-Acked-by: Laszlo Ersek <lersek@redhat.com>
RH-Acked-by: Michael S. Tsirkin <mst@redhat.com>
RH-Acked-by: Miroslav Rezanina <mrezanin@redhat.com>

From: Peter Xu <peterx@redhat.com>

No functional change. Cleanup only.

Signed-off-by: Peter Xu <peterx@redhat.com>
Reviewed-by: Fam Zheng <famz@redhat.com>
Message-Id: <1455772616-8668-6-git-send-email-peterx@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

(cherry picked from commit ca1fc8c97e9f26690b1ddbbbced5bafb3d65f6b5)

RHEL: minor conflict due to "detach" mode not being backported.

Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Signed-off-by: Miroslav Rezanina <mrezanin@redhat.com>
---
 dump.c                | 35 +++++++++++++++++++++++------------
 include/sysemu/dump.h |  3 +++
 2 files changed, 26 insertions(+), 12 deletions(-)

diff --git a/dump.c b/dump.c
index 639d52a..4bce6cf 100644
--- a/dump.c
+++ b/dump.c
@@ -1470,6 +1470,9 @@ static void dump_init(DumpState *s, int fd, bool has_format,
     Error *err = NULL;
     int ret;
 
+    s->has_format = has_format;
+    s->format = format;
+
     /* kdump-compressed is conflict with paging and filter */
     if (has_format && format != DUMP_GUEST_MEMORY_FORMAT_ELF) {
         assert(!paging && !has_filter);
@@ -1628,8 +1631,25 @@ cleanup:
     dump_cleanup(s);
 }
 
-void qmp_dump_guest_memory(bool paging, const char *file, bool has_begin,
-                           int64_t begin, bool has_length,
+/* this operation might be time consuming. */
+static void dump_process(DumpState *s, Error **errp)
+{
+    Error *local_err = NULL;
+
+    if (s->has_format && s->format != DUMP_GUEST_MEMORY_FORMAT_ELF) {
+        create_kdump_vmcore(s, &local_err);
+    } else {
+        create_vmcore(s, &local_err);
+    }
+
+    s->status = (local_err ? DUMP_STATUS_FAILED : DUMP_STATUS_COMPLETED);
+    error_propagate(errp, local_err);
+
+    dump_cleanup(s);
+}
+
+void qmp_dump_guest_memory(bool paging, const char *file,
+                           bool has_begin, int64_t begin, bool has_length,
                            int64_t length, bool has_format,
                            DumpGuestMemoryFormat format, Error **errp)
 {
@@ -1712,16 +1732,7 @@ void qmp_dump_guest_memory(bool paging, const char *file, bool has_begin,
         return;
     }
 
-    if (has_format && format != DUMP_GUEST_MEMORY_FORMAT_ELF) {
-        create_kdump_vmcore(s, &local_err);
-    } else {
-        create_vmcore(s, &local_err);
-    }
-
-    s->status = (local_err ? DUMP_STATUS_FAILED : DUMP_STATUS_COMPLETED);
-    error_propagate(errp, local_err);
-
-    dump_cleanup(s);
+    dump_process(s, errp);
 }
 
 DumpGuestMemoryCapability *qmp_query_dump_guest_memory_capability(Error **errp)
diff --git a/include/sysemu/dump.h b/include/sysemu/dump.h
index 21fc02d..1da3ddb 100644
--- a/include/sysemu/dump.h
+++ b/include/sysemu/dump.h
@@ -178,6 +178,9 @@ typedef struct DumpState {
     size_t num_dumpable;        /* number of page that can be dumped */
     uint32_t flag_compress;     /* indicate the compression format */
     DumpStatus status;          /* current dump status */
+
+    bool has_format;              /* whether format is provided */
+    DumpGuestMemoryFormat format; /* valid only if has_format == true */
 } DumpState;
 
 uint16_t cpu_to_dump16(DumpState *s, uint16_t val);
-- 
1.8.3.1