feat(filesystem): 引入Umount系统调用 (#719)

* feat(filesystem): 引入Umount系统调用 * 将所有ENOSYS误用更正 * 修复了一个使同一个挂载点可以挂载2个文件系统的bug * 统一注释，增强程序稳定性，统一接口。注意：Umount时在fatfs的路径要使用大写，此受限于当前文件系统设计。

Author: Samuka007

README.md

@@ -112,7 +112,7 @@
 - [谢润霖](https://github.com/xiaolin2004)
 - [蔡俊源](https://github.com/SMALLC04)
 - Kelly
-- [戴吕琛](https://github.com/Samuka007)
+- [Samuka007](https://github.com/Samuka007)
 - [杨璐玮](https://github.com/val213)
 - [何懿聪](https://github.com/GnoCiYeH)
 - [周凯韬](https://github.com/laokengwt)

README_EN.md

@@ -104,7 +104,7 @@ We guarantee that all sponsorship funds and items will be used for:
 - [谢润霖](https://github.com/xiaolin2004)
 - [蔡俊源](https://github.com/SMALLC04)
 - Kelly
-- [戴吕琛](https://github.com/Samuka007)
+- [Samuka007](https://github.com/Samuka007)
 - [杨璐玮](https://github.com/val213)
 - [何懿聪](https://github.com/GnoCiYeH)
 - [周凯韬](https://github.com/laokengwt)

docs/kernel/libs/lib_ui/scm.md

@@ -13,30 +13,30 @@
 pub trait ScmUiFramework: Sync + Send + Debug {
  // 安装ui框架的回调函数
  fn install(&self) -> Result<i32, SystemError> {
- return Err(SystemError::EOPNOTSUPP_OR_ENOTSUP);
+ return Err(SystemError::ENOSYS);
  }
  // 卸载ui框架的回调函数
  fn uninstall(&self) -> Result<i32, SystemError> {
- return Err(SystemError::EOPNOTSUPP_OR_ENOTSUP);
+ return Err(SystemError::ENOSYS);
  }
  // 启用ui框架的回调函数
  fn enable(&self) -> Result<i32, SystemError> {
- return Err(SystemError::EOPNOTSUPP_OR_ENOTSUP);
+ return Err(SystemError::ENOSYS);
  }
  // 禁用ui框架的回调函数
  fn disable(&self) -> Result<i32, SystemError> {
- return Err(SystemError::EOPNOTSUPP_OR_ENOTSUP);
+ return Err(SystemError::ENOSYS);
  }
  // 改变ui框架的帧缓冲区的回调函数
  fn change(&self, _buf: ScmBufferInfo) -> Result<i32, SystemError> {
- return Err(SystemError::EOPNOTSUPP_OR_ENOTSUP);
+ return Err(SystemError::ENOSYS);
  }
  /// @brief 获取ScmUiFramework的元数据
  /// @return 成功：Ok(ScmUiFramework的元数据)
  /// 失败：Err(错误码)
  fn metadata(&self) -> Result<ScmUiFrameworkMetadata, SystemError> {
  // 若文件系统没有实现此方法，则返回“不支持”
- return Err(SystemError::EOPNOTSUPP_OR_ENOTSUP);
+ return Err(SystemError::ENOSYS);
  }
 }
 ```

kernel/src/arch/x86_64/kvm/mod.rs

@@ -34,14 +34,14 @@ impl X86_64KVMArch {
  // Check to see if CPU is Intel (“GenuineIntel”).
  if let Some(vi) = cpuid.get_vendor_info() {
  if vi.as_str() != "GenuineIntel" {
- return Err(SystemError::EOPNOTSUPP_OR_ENOTSUP);
+ return Err(SystemError::ENOSYS);
  }
  }
  // Check processor supports for Virtual Machine Extension (VMX) technology
  // CPUID.1:ECX.VMX[bit 5] = 1 (Intel Manual: 24.6 Discovering Support for VMX)
  if let Some(fi) = cpuid.get_feature_info() {
  if !fi.has_vmx() {
- return Err(SystemError::EOPNOTSUPP_OR_ENOTSUP);
+ return Err(SystemError::ENOSYS);
  }
  }
  Ok(())

kernel/src/arch/x86_64/kvm/vmx/ept.rs

@@ -15,7 +15,7 @@ pub fn check_ept_features() -> Result<(), SystemError> {
  const MTRR_ENABLE_BIT: u64 = 1 << 11;
  let ia32_mtrr_def_type = unsafe { msr::rdmsr(msr::IA32_MTRR_DEF_TYPE) };
  if (ia32_mtrr_def_type & MTRR_ENABLE_BIT) == 0 {
- return Err(SystemError::EOPNOTSUPP_OR_ENOTSUP);
+ return Err(SystemError::ENOSYS);
  }
  Ok(())
 }

kernel/src/arch/x86_64/kvm/vmx/vcpu.rs

@@ -419,7 +419,7 @@ impl Vcpu for VmxVcpu {
  }
  Err(e) => {
  kdebug!("[-] CPU does not support Intel VMX: {:?}", e);
- return Err(SystemError::EOPNOTSUPP_OR_ENOTSUP);
+ return Err(SystemError::ENOSYS);
  }
  };
 
@@ -429,7 +429,7 @@ impl Vcpu for VmxVcpu {
  }
  Err(_) => {
  kdebug!("[-] VMX operation is not supported on this processor.");
- return Err(SystemError::EOPNOTSUPP_OR_ENOTSUP);
+ return Err(SystemError::ENOSYS);
  }
  }
 
@@ -574,12 +574,12 @@ pub fn has_intel_vmx_support() -> Result<(), SystemError> {
  let cpuid = CpuId::new();
  if let Some(vi) = cpuid.get_vendor_info() {
  if vi.as_str() != "GenuineIntel" {
- return Err(SystemError::EOPNOTSUPP_OR_ENOTSUP);
+ return Err(SystemError::ENOSYS);
  }
  }
  if let Some(fi) = cpuid.get_feature_info() {
  if !fi.has_vmx() {
- return Err(SystemError::EOPNOTSUPP_OR_ENOTSUP);
+ return Err(SystemError::ENOSYS);
  }
  }
  Ok(())

kernel/src/driver/acpi/sysfs.rs

@@ -205,11 +205,11 @@ impl AttrAcpiTable {
 
 impl Attribute for AttrAcpiTable {
  fn show(&self, _kobj: Arc<dyn KObject>, _buf: &mut [u8]) -> Result<usize, SystemError> {
- return Err(SystemError::EOPNOTSUPP_OR_ENOTSUP);
+ return Err(SystemError::ENOSYS);
  }
 
  fn store(&self, _kobj: Arc<dyn KObject>, _buf: &[u8]) -> Result<usize, SystemError> {
- return Err(SystemError::EOPNOTSUPP_OR_ENOTSUP);
+ return Err(SystemError::ENOSYS);
  }
 
  fn name(&self) -> &str {
@@ -235,7 +235,7 @@ impl BinAttribute for AttrAcpiTable {
  _buf: &[u8],
  _offset: usize,
  ) -> Result<usize, SystemError> {
- return Err(SystemError::EOPNOTSUPP_OR_ENOTSUP);
+ return Err(SystemError::ENOSYS);
  }
 
  /// 展示 ACPI 表的内容

kernel/src/driver/base/device/bus.rs

@@ -134,9 +134,9 @@ pub trait Bus: Debug + Send + Sync {
  ///
  /// ## 默认实现
  ///
- /// 如果总线不支持该操作，返回`SystemError::EOPNOTSUPP_OR_ENOTSUP`
+ /// 如果总线不支持该操作，返回`SystemError::ENOSYS`
  fn probe(&self, _device: &Arc<dyn Device>) -> Result<(), SystemError> {
- return Err(SystemError::EOPNOTSUPP_OR_ENOTSUP);
+ return Err(SystemError::ENOSYS);
  }
  fn remove(&self, _device: &Arc<dyn Device>) -> Result<(), SystemError>;
  fn sync_state(&self, _device: &Arc<dyn Device>) {}
@@ -750,7 +750,7 @@ impl Attribute for DriverAttrUnbind {
  "Intertrait casting not implemented for kobj: {}",
  kobj.name()
  );
- SystemError::EOPNOTSUPP_OR_ENOTSUP
+ SystemError::ENOSYS
  })?;
 
  let bus = driver
@@ -799,7 +799,7 @@ impl Attribute for DriverAttrBind {
  "Intertrait casting not implemented for kobj: {}",
  kobj.name()
  );
- SystemError::EOPNOTSUPP_OR_ENOTSUP
+ SystemError::ENOSYS
  })?;
 
  let bus = driver

kernel/src/driver/base/device/dd.rs

@@ -502,7 +502,7 @@ impl DriverManager {
  .and_then(|bus| bus.upgrade())
  .ok_or(SystemError::EINVAL)?;
  let r = bus.probe(device);
- if r == Err(SystemError::EOPNOTSUPP_OR_ENOTSUP) {
+ if r == Err(SystemError::ENOSYS) {
  kerror!(
  "call_driver_probe: bus.probe() failed, dev: '{}', err: {:?}",
  device.name(),
@@ -592,7 +592,7 @@ impl Attribute for DeviceAttrStateSynced {
  "Intertrait casting not implemented for kobj: {}",
  kobj.name()
  );
- SystemError::EOPNOTSUPP_OR_ENOTSUP
+ SystemError::ENOSYS
  })?;
 
  let val = dev.state_synced();
@@ -627,7 +627,7 @@ impl Attribute for DeviceAttrCoredump {
  "Intertrait casting not implemented for kobj: {}",
  kobj.name()
  );
- SystemError::EOPNOTSUPP_OR_ENOTSUP
+ SystemError::ENOSYS
  })?;
 
  let drv = dev.driver().ok_or(SystemError::EINVAL)?;

kernel/src/driver/base/device/mod.rs

@@ -875,7 +875,7 @@ impl Attribute for DeviceAttrDev {
  "Intertrait casting not implemented for kobj: {}",
  kobj.name()
  );
- SystemError::EOPNOTSUPP_OR_ENOTSUP
+ SystemError::ENOSYS
  })?;
 
  let device_number = dev.id_table().device_number();