Deep dive into Kernel

@include/block/block_int.h struct BlockDriverState /* * Note: the function bdrv_append() copies and swaps contents of * BlockDriverStates, so if you add new fields to this struct, please * inspect bdrv_append() to determine if the new fields need to be * copied as well. */ struct BlockDriverState { int64_t total_sectors; /* if we are reading a disk image, give its size in sectors */ int read_onl..

file: qemu-img.c ㅇ flags o 주요 변수들BlockDriverState *bs, *bs_old_backing = NULL, *bs_new_backing = NULL;BlockDriver *old_backing_drv, *new_backing_drv;int flags; o Open the image/* * Open the images. * * Ignore the old backing file for unsafe rebase in case we want to correct * the reference to a renamed or moved backing file. */ bs = bdrv_new_open("image", filename, fmt, flags, true, quiet); if (..

sudo add-apt-repository ppa:webupd8team/java sudo apt-get update sudo apt-get install oracle-java7-installersudo apt-get install oracle-java7-set-default

1. Write the command's and type(s) specification in the QAPI schema file (qapi-schema.json in the root source directory) { 'command': 'block_rebase', 'data': { 'device': 'str', 'file': 'str' } }Currently, I only support rebase from qcow2 to qcow2. edit qmp-commands.hx{ .name = "block_rebase", .args_type = "device:s,file:s", .mhandler.cmd_new = qmp_marshal_input_block_rebase, }, SQMPblock_rebase-..