From 17658e0660b29e530c3083a8371ddaded7337ed3 Mon Sep 17 00:00:00 2001
From: Laszlo Ersek <lersek@redhat.com>
Date: Sat, 22 Mar 2014 03:31:00 +0100
Subject: [PATCH 09/30] dump: add API to write vmcore
RH-Author: Laszlo Ersek <lersek@redhat.com>
Message-id: <1395459071-19118-9-git-send-email-lersek@redhat.com>
Patchwork-id: 58220
O-Subject: [RHEL-6.6 qemu-kvm PATCH 08/19] dump: add API to write vmcore
Bugzilla: 1035162
RH-Acked-by: Paolo Bonzini <pbonzini@redhat.com>
RH-Acked-by: Dr. David Alan Gilbert (git) <dgilbert@redhat.com>
RH-Acked-by: Luiz Capitulino <lcapitulino@redhat.com>
From: qiaonuohan <qiaonuohan@cn.fujitsu.com>
Function is used to write vmcore in flatten format. In flatten format, data is
written block by block, and in front of each block, a struct
MakedumpfileDataHeader is stored there to indicate the offset and size of the
data block.
struct MakedumpfileDataHeader {
int64_t offset;
int64_t buf_size;
};
Signed-off-by: Qiao Nuohan <qiaonuohan@cn.fujitsu.com>
Reviewed-by: Laszlo Ersek <lersek@redhat.com>
Signed-off-by: Luiz Capitulino <lcapitulino@redhat.com>
(cherry picked from commit 5d31babe5c7d854d6b8470bc9fa67a698926e65d)
Signed-off-by: Laszlo Ersek <lersek@redhat.com>
---
dump.c | 21 +++++++++++++++++++++
1 file changed, 21 insertions(+)
Signed-off-by: Miroslav Rezanina <mrezanin@redhat.com>
---
dump.c | 21 +++++++++++++++++++++
1 files changed, 21 insertions(+), 0 deletions(-)
diff --git a/dump.c b/dump.c
index 12d234d..42dabe3 100644
--- a/dump.c
+++ b/dump.c
@@ -728,6 +728,27 @@ static int write_end_flat_header(int fd)
return 0;
}
+static int write_buffer(int fd, off_t offset, const void *buf, size_t size)
+{
+ size_t written_size;
+ MakedumpfileDataHeader mdh;
+
+ mdh.offset = cpu_to_be64(offset);
+ mdh.buf_size = cpu_to_be64(size);
+
+ written_size = qemu_write_full(fd, &mdh, sizeof(mdh));
+ if (written_size != sizeof(mdh)) {
+ return -1;
+ }
+
+ written_size = qemu_write_full(fd, buf, size);
+ if (written_size != size) {
+ return -1;
+ }
+
+ return 0;
+}
+
static ram_addr_t get_start_block(DumpState *s)
{
GuestPhysBlock *block;
--
1.7.1