diff options
Diffstat (limited to 'OvmfPkg')
| -rw-r--r-- | OvmfPkg/OvmfPkgIa32.dsc | 1 | ||||
| -rw-r--r-- | OvmfPkg/OvmfPkgIa32.fdf | 1 | ||||
| -rw-r--r-- | OvmfPkg/OvmfPkgIa32X64.dsc | 1 | ||||
| -rw-r--r-- | OvmfPkg/OvmfPkgIa32X64.fdf | 1 | ||||
| -rw-r--r-- | OvmfPkg/OvmfPkgX64.dsc | 1 | ||||
| -rw-r--r-- | OvmfPkg/OvmfPkgX64.fdf | 1 | ||||
| -rw-r--r-- | OvmfPkg/VirtioFsDxe/DriverBinding.c | 112 | ||||
| -rw-r--r-- | OvmfPkg/VirtioFsDxe/VirtioFsDxe.inf | 92 |
8 files changed, 210 insertions, 0 deletions
diff --git a/OvmfPkg/OvmfPkgIa32.dsc b/OvmfPkg/OvmfPkgIa32.dsc index 8eede796a8..4ff70674fb 100644 --- a/OvmfPkg/OvmfPkgIa32.dsc +++ b/OvmfPkg/OvmfPkgIa32.dsc @@ -812,6 +812,7 @@ MdeModulePkg/Universal/Disk/UnicodeCollation/EnglishDxe/EnglishDxe.inf
FatPkg/EnhancedFatDxe/Fat.inf
MdeModulePkg/Universal/Disk/UdfDxe/UdfDxe.inf
+ OvmfPkg/VirtioFsDxe/VirtioFsDxe.inf
MdeModulePkg/Bus/Scsi/ScsiBusDxe/ScsiBusDxe.inf
MdeModulePkg/Bus/Scsi/ScsiDiskDxe/ScsiDiskDxe.inf
OvmfPkg/SataControllerDxe/SataControllerDxe.inf
diff --git a/OvmfPkg/OvmfPkgIa32.fdf b/OvmfPkg/OvmfPkgIa32.fdf index c07b775d0a..f400c845b9 100644 --- a/OvmfPkg/OvmfPkgIa32.fdf +++ b/OvmfPkg/OvmfPkgIa32.fdf @@ -290,6 +290,7 @@ INF MdeModulePkg/Universal/Acpi/BootGraphicsResourceTableDxe/BootGraphicsResour INF FatPkg/EnhancedFatDxe/Fat.inf
INF MdeModulePkg/Universal/Disk/UdfDxe/UdfDxe.inf
+INF OvmfPkg/VirtioFsDxe/VirtioFsDxe.inf
!if $(TOOL_CHAIN_TAG) != "XCODE5"
INF ShellPkg/DynamicCommand/TftpDynamicCommand/TftpDynamicCommand.inf
diff --git a/OvmfPkg/OvmfPkgIa32X64.dsc b/OvmfPkg/OvmfPkgIa32X64.dsc index f9f82a48f4..d40a59183c 100644 --- a/OvmfPkg/OvmfPkgIa32X64.dsc +++ b/OvmfPkg/OvmfPkgIa32X64.dsc @@ -826,6 +826,7 @@ MdeModulePkg/Universal/Disk/UnicodeCollation/EnglishDxe/EnglishDxe.inf
FatPkg/EnhancedFatDxe/Fat.inf
MdeModulePkg/Universal/Disk/UdfDxe/UdfDxe.inf
+ OvmfPkg/VirtioFsDxe/VirtioFsDxe.inf
MdeModulePkg/Bus/Scsi/ScsiBusDxe/ScsiBusDxe.inf
MdeModulePkg/Bus/Scsi/ScsiDiskDxe/ScsiDiskDxe.inf
OvmfPkg/SataControllerDxe/SataControllerDxe.inf
diff --git a/OvmfPkg/OvmfPkgIa32X64.fdf b/OvmfPkg/OvmfPkgIa32X64.fdf index 9adf1525c1..d055552fd0 100644 --- a/OvmfPkg/OvmfPkgIa32X64.fdf +++ b/OvmfPkg/OvmfPkgIa32X64.fdf @@ -291,6 +291,7 @@ INF MdeModulePkg/Universal/Acpi/BootGraphicsResourceTableDxe/BootGraphicsResour INF FatPkg/EnhancedFatDxe/Fat.inf
INF MdeModulePkg/Universal/Disk/UdfDxe/UdfDxe.inf
+INF OvmfPkg/VirtioFsDxe/VirtioFsDxe.inf
!if $(TOOL_CHAIN_TAG) != "XCODE5"
INF ShellPkg/DynamicCommand/TftpDynamicCommand/TftpDynamicCommand.inf
diff --git a/OvmfPkg/OvmfPkgX64.dsc b/OvmfPkg/OvmfPkgX64.dsc index e59ae05b73..ec7886235a 100644 --- a/OvmfPkg/OvmfPkgX64.dsc +++ b/OvmfPkg/OvmfPkgX64.dsc @@ -822,6 +822,7 @@ MdeModulePkg/Universal/Disk/UnicodeCollation/EnglishDxe/EnglishDxe.inf
FatPkg/EnhancedFatDxe/Fat.inf
MdeModulePkg/Universal/Disk/UdfDxe/UdfDxe.inf
+ OvmfPkg/VirtioFsDxe/VirtioFsDxe.inf
MdeModulePkg/Bus/Scsi/ScsiBusDxe/ScsiBusDxe.inf
MdeModulePkg/Bus/Scsi/ScsiDiskDxe/ScsiDiskDxe.inf
OvmfPkg/SataControllerDxe/SataControllerDxe.inf
diff --git a/OvmfPkg/OvmfPkgX64.fdf b/OvmfPkg/OvmfPkgX64.fdf index 17ba9e177a..1a2ef5bf2a 100644 --- a/OvmfPkg/OvmfPkgX64.fdf +++ b/OvmfPkg/OvmfPkgX64.fdf @@ -300,6 +300,7 @@ INF MdeModulePkg/Universal/Acpi/BootGraphicsResourceTableDxe/BootGraphicsResour INF FatPkg/EnhancedFatDxe/Fat.inf
INF MdeModulePkg/Universal/Disk/UdfDxe/UdfDxe.inf
+INF OvmfPkg/VirtioFsDxe/VirtioFsDxe.inf
!if $(TOOL_CHAIN_TAG) != "XCODE5"
INF ShellPkg/DynamicCommand/TftpDynamicCommand/TftpDynamicCommand.inf
diff --git a/OvmfPkg/VirtioFsDxe/DriverBinding.c b/OvmfPkg/VirtioFsDxe/DriverBinding.c new file mode 100644 index 0000000000..ac0a6330f0 --- /dev/null +++ b/OvmfPkg/VirtioFsDxe/DriverBinding.c @@ -0,0 +1,112 @@ +/** @file
+ Provide EFI_SIMPLE_FILE_SYSTEM_PROTOCOL instances on virtio-fs devices.
+
+ Copyright (C) 2020, Red Hat, Inc.
+
+ SPDX-License-Identifier: BSD-2-Clause-Patent
+**/
+
+#include <Library/BaseLib.h> // AsciiStrCmp()
+#include <Library/UefiBootServicesTableLib.h> // gBS
+#include <Protocol/ComponentName2.h> // EFI_COMPONENT_NAME2_PROTOCOL
+#include <Protocol/DriverBinding.h> // EFI_DRIVER_BINDING_PROTOCOL
+
+//
+// UEFI Driver Model protocol instances.
+//
+STATIC EFI_DRIVER_BINDING_PROTOCOL mDriverBinding;
+STATIC EFI_COMPONENT_NAME2_PROTOCOL mComponentName2;
+
+//
+// UEFI Driver Model protocol member functions.
+//
+EFI_STATUS
+EFIAPI
+VirtioFsBindingSupported (
+ IN EFI_DRIVER_BINDING_PROTOCOL *This,
+ IN EFI_HANDLE ControllerHandle,
+ IN EFI_DEVICE_PATH_PROTOCOL *RemainingDevicePath OPTIONAL
+ )
+{
+ return EFI_UNSUPPORTED;
+}
+
+EFI_STATUS
+EFIAPI
+VirtioFsBindingStart (
+ IN EFI_DRIVER_BINDING_PROTOCOL *This,
+ IN EFI_HANDLE ControllerHandle,
+ IN EFI_DEVICE_PATH_PROTOCOL *RemainingDevicePath OPTIONAL
+ )
+{
+ return EFI_DEVICE_ERROR;
+}
+
+EFI_STATUS
+EFIAPI
+VirtioFsBindingStop (
+ IN EFI_DRIVER_BINDING_PROTOCOL *This,
+ IN EFI_HANDLE ControllerHandle,
+ IN UINTN NumberOfChildren,
+ IN EFI_HANDLE *ChildHandleBuffer OPTIONAL
+ )
+{
+ return EFI_DEVICE_ERROR;
+}
+
+EFI_STATUS
+EFIAPI
+VirtioFsGetDriverName (
+ IN EFI_COMPONENT_NAME2_PROTOCOL *This,
+ IN CHAR8 *Language,
+ OUT CHAR16 **DriverName
+ )
+{
+ if (AsciiStrCmp (Language, "en") != 0) {
+ return EFI_UNSUPPORTED;
+ }
+ *DriverName = L"Virtio Filesystem Driver";
+ return EFI_SUCCESS;
+}
+
+EFI_STATUS
+EFIAPI
+VirtioFsGetControllerName (
+ IN EFI_COMPONENT_NAME2_PROTOCOL *This,
+ IN EFI_HANDLE ControllerHandle,
+ IN EFI_HANDLE ChildHandle OPTIONAL,
+ IN CHAR8 *Language,
+ OUT CHAR16 **ControllerName
+ )
+{
+ return EFI_UNSUPPORTED;
+}
+
+//
+// Entry point of this driver.
+//
+EFI_STATUS
+EFIAPI
+VirtioFsEntryPoint (
+ IN EFI_HANDLE ImageHandle,
+ IN EFI_SYSTEM_TABLE *SystemTable
+ )
+{
+ EFI_STATUS Status;
+
+ mDriverBinding.Supported = VirtioFsBindingSupported;
+ mDriverBinding.Start = VirtioFsBindingStart;
+ mDriverBinding.Stop = VirtioFsBindingStop;
+ mDriverBinding.Version = 0x10;
+ mDriverBinding.ImageHandle = ImageHandle;
+ mDriverBinding.DriverBindingHandle = ImageHandle;
+
+ mComponentName2.GetDriverName = VirtioFsGetDriverName;
+ mComponentName2.GetControllerName = VirtioFsGetControllerName;
+ mComponentName2.SupportedLanguages = "en";
+
+ Status = gBS->InstallMultipleProtocolInterfaces (&ImageHandle,
+ &gEfiDriverBindingProtocolGuid, &mDriverBinding,
+ &gEfiComponentName2ProtocolGuid, &mComponentName2, NULL);
+ return Status;
+}
diff --git a/OvmfPkg/VirtioFsDxe/VirtioFsDxe.inf b/OvmfPkg/VirtioFsDxe/VirtioFsDxe.inf new file mode 100644 index 0000000000..69cb44bc7c --- /dev/null +++ b/OvmfPkg/VirtioFsDxe/VirtioFsDxe.inf @@ -0,0 +1,92 @@ +## @file
+# Provide EFI_SIMPLE_FILE_SYSTEM_PROTOCOL instances on virtio-fs devices.
+#
+# Copyright (C) 2020, Red Hat, Inc.
+#
+# SPDX-License-Identifier: BSD-2-Clause-Patent
+#
+#
+# Permission Model of this driver:
+#
+# Regardless of the UID and GID values this driver send in the FUSE request
+# header, the daemon (that is, the Virtio Filesystem device) always acts with
+# root privileges on the host side. The only time the daemon considers said UID
+# and GID fields is when creating a new file or directory. Thus, the guest
+# driver cannot rely on the host for enforcing any file mode permissions,
+# regardless of the "personality" that the guest driver poses as, because
+# "root" on the host side ignores all file mode bits.
+#
+# Therefore the guest driver has to do its own permission checking, and use the
+# host-side file mode bits only as a kind of "metadata storage" or "reminder"
+# -- hopefully in a way that makes some sense on the host side too.
+#
+# The complete mapping between the EFI_FILE_PROTOCOL and the host-side file
+# mode bits is described below.
+#
+# - The guest driver poses as UID 0, GID 0, PID 1.
+#
+# - If and only if all "w" bits are missing from a file on the host side, then
+# the file or directory is reported as EFI_FILE_READ_ONLY in the guest. When
+# setting EFI_FILE_READ_ONLY in the guest, all "w" bits (0222) are cleared on
+# the host; when clearing EFI_FILE_READ_ONLY in the guest, all "w" bits are
+# set on the host. Viewed from the host side, this sort of reflects that an
+# EFI_FILE_READ_ONLY file should not be written by anyone.
+#
+# - The attributes EFI_FILE_HIDDEN, EFI_FILE_SYSTEM, EFI_FILE_RESERVED, and
+# EFI_FILE_ARCHIVE are never reported in the guest, and they are silently
+# ignored when a SetInfo() call or a file-creating Open() call requests them.
+#
+# - On the host, files are created with 0666 file mode bits, directories are
+# created with 0777 file mode bits.
+#
+# - In the guest, the EFI_FILE_READ_ONLY attribute only controls the permitted
+# open mode. In particular, on directories, the EFI_FILE_READ_ONLY attribute
+# does not prevent the creation or deletion of entries inside the directory;
+# EFI_FILE_READ_ONLY only prevents the renaming, deleting, flushing (syncing)
+# and touching of the directory itself (with "touching" meaning updating the
+# timestamps). The fact that EFI_FILE_READ_ONLY being set on a directory is
+# irrelevant in the guest with regard to entry creation/deletion, is
+# well-mirrored by the fact that virtiofsd -- which runs as root, regardless
+# of guest driver personality -- ignores the absence of "w" permissions on a
+# host-side directory, when creating or removing entries in it.
+#
+# - When an EFI_FILE_PROTOCOL is opened read-only, then the Delete(), Write()
+# and Flush() member functions are disabled for it. Additionally, SetInfo()
+# is restricted to flipping the EFI_FILE_READ_ONLY bit (which takes effect at
+# the next Open()).
+#
+# - As a consequence of the above, for deleting a directory, it must be
+# presented in the guest as openable for writing.
+#
+# - We diverge from the UEFI spec, and permit Flush() on a directory that has
+# been opened read-write; otherwise the only way to invoke FUSE_FSYNCDIR on a
+# directory would be to Close() it.
+#
+# - OpenVolume() opens the root directory for read-only access. The Open()
+# member function may open it for read-write access. While the root directory
+# cannot be renamed or deleted, opening it for read-write access is useful
+# for calling Flush(), according to the previous paragraph, or for updating
+# the root directory's timestamps with SetInfo().
+##
+
+[Defines]
+ INF_VERSION = 1.29
+ BASE_NAME = VirtioFsDxe
+ FILE_GUID = 7BD9DDF7-8B83-488E-AEC9-24C78610289C
+ MODULE_TYPE = UEFI_DRIVER
+ ENTRY_POINT = VirtioFsEntryPoint
+
+[Packages]
+ MdePkg/MdePkg.dec
+
+[Sources]
+ DriverBinding.c
+
+[LibraryClasses]
+ BaseLib
+ UefiBootServicesTableLib
+ UefiDriverEntryPoint
+
+[Protocols]
+ gEfiComponentName2ProtocolGuid ## PRODUCES
+ gEfiDriverBindingProtocolGuid ## PRODUCES
|