你可以在文件保存之前添加判断可用空间的逻辑，并在不满足条件时返回错误提示。以下是一个示例代码，供参考：
public function saas_upgrade()
{
if ($this->request->isPost() == false) {
$this->error(__("Invalid method"));
}
$data = [
'file_upgrade' => $this->request->file('file_upgrade'),
];
// 判断剩余磁盘空间是否小于50M
$availableSpace = disk_free_space('/');
if ($availableSpace < 50 * 1024 * 1024) { // 单位为字节
$this->error("剩余磁盘空间不足50M");
}
$rule = [
'fname' => 'require|regex:^[a-zA-Z0-9_]*\.tar\.gz$',
];
$file_upgrade = [
'file' => $data['file_upgrade'],
'fname' => $data['file_upgrade']->getOriginalName(),
'fsize' => $data['file_upgrade']->getSize(),
];
$validate = Validate::rule($rule);
if (!$validate->check($file_upgrade)) {
$this->error($validate->getError());
}
file_put_contents("/www/server/saas_upgrade/saas_upgrade.tar.gz", file_get_contents($file_upgrade['file']));
shell_exec("sudo /www/server/saas_upgrade.sh > /dev/null 2>&1 &");
$this->success("上传升级包成功,正在自动升级,请等待片刻再访问SaaS系统");
}
这段代码通过 disk_free_space('/') 函数获取根目录的可用空间，单位为字节。如果剩余空间小于 50MB（50 * 1024 * 1024 字节），则会返回错误提示。你可以根据实际情况调整判断条件和错误提示信息。
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![/data # iw --debug dev wlan0 connect -w "lucky-5g" auth open key 0:1234567890
Usage: iw [options] dev connect [-w] [] [] [auth open|shared] [key 0:abcde d:1:6162636465] [mfp:req/opt/no]
Join the network with ...](https://linuxcpp.0voice.com/zb_users/upload/2023/05/202305162239148267954.png)
![驱动代码
void kalRxTaskletSchedule(struct GLUE_INFO *pr)
{
static unsigned int num = 0;
tasklet_hi_schedule(&pr->rRxTask[(num++)%NR_CPUS]);
// tasklet_hi_schedule(&pr->rRxTask);
DBGLOG(HAL, ERROR,](https://linuxcpp.0voice.com/zb_users/upload/2023/05/202305162226144313964.png)
