Commit 5d31babe authored Feb 18, 2014 by qiaonuohan Committed by Luiz Capitulino Feb 28, 2014

dump: add API to write vmcore



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>

parent fda05387

dump.c

+21 −0

Original line number	Diff line number	Diff line
		@@ -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;