C++ (Cpp) qcow2_cache_flush_dependency示例

示例#1

文件： qcow2-cache.c 项目： rmhsilva/qemu

static int qcow2_cache_entry_flush(BlockDriverState *bs, Qcow2Cache *c, int i)
{
    BDRVQcowState *s = bs->opaque;
    int ret = 0;

    if (!c->entries[i].dirty || !c->entries[i].offset) {
        return 0;
    }

    trace_qcow2_cache_entry_flush(qemu_coroutine_self(),
                                  c == s->l2_table_cache, i);

    if (c->depends) {
        ret = qcow2_cache_flush_dependency(bs, c);
    } else if (c->depends_on_flush) {
        ret = bdrv_flush(bs->file);
        if (ret >= 0) {
            c->depends_on_flush = false;
        }
    }

    if (ret < 0) {
        return ret;
    }

    if (c == s->refcount_block_cache) {
        ret = qcow2_pre_write_overlap_check(bs,
                                            QCOW2_OL_DEFAULT & ~QCOW2_OL_REFCOUNT_BLOCK,
                                            c->entries[i].offset, s->cluster_size);
    } else if (c == s->l2_table_cache) {
        ret = qcow2_pre_write_overlap_check(bs,
                                            QCOW2_OL_DEFAULT & ~QCOW2_OL_ACTIVE_L2,
                                            c->entries[i].offset, s->cluster_size);
    } else {
        ret = qcow2_pre_write_overlap_check(bs, QCOW2_OL_DEFAULT,
                                            c->entries[i].offset, s->cluster_size);
    }

    if (ret < 0) {
        return ret;
    }

    if (c == s->refcount_block_cache) {
        BLKDBG_EVENT(bs->file, BLKDBG_REFBLOCK_UPDATE_PART);
    } else if (c == s->l2_table_cache) {
        BLKDBG_EVENT(bs->file, BLKDBG_L2_UPDATE);
    }

    ret = bdrv_pwrite(bs->file, c->entries[i].offset, c->entries[i].table,
                      s->cluster_size);
    if (ret < 0) {
        return ret;
    }

    c->entries[i].dirty = false;

    return 0;
}

示例#2

文件： qcow2-cache.c 项目： 16aug/nvmeqemu

int qcow2_cache_set_dependency(BlockDriverState *bs, Qcow2Cache *c,
    Qcow2Cache *dependency)
{
    int ret;

    if (dependency->depends) {
        ret = qcow2_cache_flush_dependency(bs, dependency);
        if (ret < 0) {
            return ret;
        }
    }

    if (c->depends && (c->depends != dependency)) {
        ret = qcow2_cache_flush_dependency(bs, c);
        if (ret < 0) {
            return ret;
        }
    }

    c->depends = dependency;
    return 0;
}

示例#3

文件： qcow2-cache.c 项目： 16aug/nvmeqemu

static int qcow2_cache_entry_flush(BlockDriverState *bs, Qcow2Cache *c, int i)
{
    BDRVQcowState *s = bs->opaque;
    int ret = 0;

    if (!c->entries[i].dirty || !c->entries[i].offset) {
        return 0;
    }

    if (c->depends) {
        ret = qcow2_cache_flush_dependency(bs, c);
    } else if (c->depends_on_flush) {
        ret = bdrv_flush(bs->file);
        if (ret >= 0) {
            c->depends_on_flush = false;
        }
    }

    if (ret < 0) {
        return ret;
    }

    if (c == s->refcount_block_cache) {
        BLKDBG_EVENT(bs->file, BLKDBG_REFBLOCK_UPDATE_PART);
    } else if (c == s->l2_table_cache) {
        BLKDBG_EVENT(bs->file, BLKDBG_L2_UPDATE);
    }

    ret = bdrv_pwrite(bs->file, c->entries[i].offset, c->entries[i].table,
        s->cluster_size);
    if (ret < 0) {
        return ret;
    }

    c->entries[i].dirty = false;

    return 0;
}