Commit 9680caee authored by Kevin Wolf's avatar Kevin Wolf
Browse files

qdev-monitor: Add blk_by_qdev_id() 



This finds the BlockBackend attached to the device model identified by
its qdev ID.

Signed-off-by: default avatarKevin Wolf <kwolf@redhat.com>
Reviewed-by: default avatarEric Blake <eblake@redhat.com>
parent 6c1db528

include/sysemu/block-backend.h

+1 −0
Original line number Diff line number Diff line
@@ -112,6 +112,7 @@ void blk_attach_dev_nofail(BlockBackend *blk, void *dev); 
void blk_detach_dev(BlockBackend *blk, void *dev);

void *blk_get_attached_dev(BlockBackend *blk);

BlockBackend *blk_by_dev(void *dev);

BlockBackend *blk_by_qdev_id(const char *id, Error **errp);

void blk_set_dev_ops(BlockBackend *blk, const BlockDevOps *ops, void *opaque);

int blk_pread_unthrottled(BlockBackend *blk, int64_t offset, uint8_t *buf,

                          int count);

qdev-monitor.c

+18 −0
Original line number Diff line number Diff line
@@ -28,6 +28,7 @@ 
#include "qemu/config-file.h"

#include "qemu/error-report.h"

#include "qemu/help_option.h"

#include "sysemu/block-backend.h"



/*

 * Aliases were a bad idea from the start.  Let's keep them
@@ -838,6 +839,23 @@ void qmp_device_del(const char *id, Error **errp) 
    }

}



BlockBackend *blk_by_qdev_id(const char *id, Error **errp)

{

    DeviceState *dev;

    BlockBackend *blk;



    dev = find_device_state(id, errp);

    if (dev == NULL) {

        return NULL;

    }



    blk = blk_by_dev(dev);

    if (!blk) {

        error_setg(errp, "Device does not have a block device backend");

    }

    return blk;

}



void qdev_machine_init(void)

{

    qdev_get_peripheral_anon();