Commit 45b4949c authored by Leonid Bloch's avatar Leonid Bloch Committed by Kevin Wolf
Browse files

qcow2: Resize the cache upon image resizing 



The caches are now recalculated upon image resizing. This is done
because the new default behavior of assigning L2 cache relatively to
the image size, implies that the cache will be adapted accordingly
after an image resize.

Signed-off-by: default avatarLeonid Bloch <lbloch@janustech.com>
Reviewed-by: default avatarAlberto Garcia <berto@igalia.com>
Signed-off-by: default avatarKevin Wolf <kwolf@redhat.com>
parent 80668d0f

block/qcow2.c

+11 −0
Original line number Diff line number Diff line
@@ -3418,6 +3418,7 @@ static int coroutine_fn qcow2_co_truncate(BlockDriverState *bs, int64_t offset, 
    uint64_t old_length;

    int64_t new_l1_size;

    int ret;

    QDict *options;



    if (prealloc != PREALLOC_MODE_OFF && prealloc != PREALLOC_MODE_METADATA &&

        prealloc != PREALLOC_MODE_FALLOC && prealloc != PREALLOC_MODE_FULL)
@@ -3642,6 +3643,8 @@ static int coroutine_fn qcow2_co_truncate(BlockDriverState *bs, int64_t offset, 
        }

    }



    bs->total_sectors = offset / BDRV_SECTOR_SIZE;



    /* write updated header.size */

    offset = cpu_to_be64(offset);

    ret = bdrv_pwrite_sync(bs->file, offsetof(QCowHeader, size),
@@ -3652,6 +3655,14 @@ static int coroutine_fn qcow2_co_truncate(BlockDriverState *bs, int64_t offset, 
    }



    s->l1_vm_state_index = new_l1_size;



    /* Update cache sizes */

    options = qdict_clone_shallow(bs->options);

    ret = qcow2_update_options(bs, options, s->flags, errp);

    qobject_unref(options);

    if (ret < 0) {

        goto fail;

    }

    ret = 0;

fail:

    qemu_co_mutex_unlock(&s->lock);