diff options
Diffstat (limited to 'OvmfPkg/VirtioFsDxe')
| -rw-r--r-- | OvmfPkg/VirtioFsDxe/Helpers.c | 119 | ||||
| -rw-r--r-- | OvmfPkg/VirtioFsDxe/VirtioFsDxe.h | 7 | ||||
| -rw-r--r-- | OvmfPkg/VirtioFsDxe/VirtioFsDxe.inf | 2 |
3 files changed, 128 insertions, 0 deletions
diff --git a/OvmfPkg/VirtioFsDxe/Helpers.c b/OvmfPkg/VirtioFsDxe/Helpers.c index 8ffdabf..e9582e4 100644 --- a/OvmfPkg/VirtioFsDxe/Helpers.c +++ b/OvmfPkg/VirtioFsDxe/Helpers.c @@ -9,6 +9,7 @@ #include <Library/BaseLib.h> // StrLen()
#include <Library/BaseMemoryLib.h> // CopyMem()
#include <Library/MemoryAllocationLib.h> // AllocatePool()
+#include <Library/TimeBaseLib.h> // EpochToEfiTime()
#include <Library/VirtioLib.h> // Virtio10WriteFeatures()
#include "VirtioFsDxe.h"
@@ -1589,3 +1590,121 @@ FreeRhsPath8: FreePool (RhsPath8);
return Status;
}
+
+/**
+ Convert select fields of a VIRTIO_FS_FUSE_ATTRIBUTES_RESPONSE object to
+ corresponding fields in EFI_FILE_INFO.
+
+ @param[in] FuseAttr The VIRTIO_FS_FUSE_ATTRIBUTES_RESPONSE object to
+ convert the relevant fields from.
+
+ @param[out] FileInfo The EFI_FILE_INFO structure to modify. Importantly, the
+ FileInfo->Size and FileInfo->FileName fields are not
+ overwritten.
+
+ @retval EFI_SUCCESS Conversion successful.
+
+ @retval EFI_UNSUPPORTED The allocated size of the file is inexpressible in
+ EFI_FILE_INFO.
+
+ @retval EFI_UNSUPPORTED One of the file access times is inexpressible in
+ EFI_FILE_INFO.
+
+ @retval EFI_UNSUPPORTED The file type is inexpressible in EFI_FILE_INFO.
+
+ @retval EFI_UNSUPPORTED The file is a regular file that has multiple names
+ on the host side (i.e., its hard link count is
+ greater than one).
+**/
+EFI_STATUS
+VirtioFsFuseAttrToEfiFileInfo (
+ IN VIRTIO_FS_FUSE_ATTRIBUTES_RESPONSE *FuseAttr,
+ OUT EFI_FILE_INFO *FileInfo
+ )
+{
+ UINT64 EpochTime[3];
+ EFI_TIME *ConvertedTime[ARRAY_SIZE (EpochTime)];
+ UINTN Idx;
+
+ FileInfo->FileSize = FuseAttr->Size;
+
+ //
+ // The unit for FuseAttr->Blocks is 512B.
+ //
+ if (FuseAttr->Blocks >= BIT55) {
+ return EFI_UNSUPPORTED;
+ }
+ FileInfo->PhysicalSize = LShiftU64 (FuseAttr->Blocks, 9);
+
+ //
+ // Convert the timestamps. File creation time is not tracked by the Virtio
+ // Filesystem device, so set FileInfo->CreateTime from FuseAttr->Mtime as
+ // well.
+ //
+ EpochTime[0] = FuseAttr->Mtime;
+ EpochTime[1] = FuseAttr->Atime;
+ EpochTime[2] = FuseAttr->Mtime;
+ ConvertedTime[0] = &FileInfo->CreateTime;
+ ConvertedTime[1] = &FileInfo->LastAccessTime;
+ ConvertedTime[2] = &FileInfo->ModificationTime;
+
+ for (Idx = 0; Idx < ARRAY_SIZE (EpochTime); Idx++) {
+ //
+ // EpochToEfiTime() takes a UINTN for seconds.
+ //
+ if (EpochTime[Idx] > MAX_UINTN) {
+ return EFI_UNSUPPORTED;
+ }
+ //
+ // Set the following fields in the converted time: Year, Month, Day, Hour,
+ // Minute, Second, Nanosecond.
+ //
+ EpochToEfiTime ((UINTN)EpochTime[Idx], ConvertedTime[Idx]);
+ //
+ // The times are all expressed in UTC. Consequently, they are not affected
+ // by daylight saving.
+ //
+ ConvertedTime[Idx]->TimeZone = 0;
+ ConvertedTime[Idx]->Daylight = 0;
+ //
+ // Clear the padding fields.
+ //
+ ConvertedTime[Idx]->Pad1 = 0;
+ ConvertedTime[Idx]->Pad2 = 0;
+ }
+
+ //
+ // Set the attributes.
+ //
+ switch (FuseAttr->Mode & VIRTIO_FS_FUSE_MODE_TYPE_MASK) {
+ case VIRTIO_FS_FUSE_MODE_TYPE_DIR:
+ FileInfo->Attribute = EFI_FILE_DIRECTORY;
+ break;
+ case VIRTIO_FS_FUSE_MODE_TYPE_REG:
+ FileInfo->Attribute = 0;
+ break;
+ default:
+ //
+ // Other file types are not supported.
+ //
+ return EFI_UNSUPPORTED;
+ }
+ //
+ // Report the regular file or directory as read-only if all classes lack
+ // write permission.
+ //
+ if ((FuseAttr->Mode & (VIRTIO_FS_FUSE_MODE_PERM_WUSR |
+ VIRTIO_FS_FUSE_MODE_PERM_WGRP |
+ VIRTIO_FS_FUSE_MODE_PERM_WOTH)) == 0) {
+ FileInfo->Attribute |= EFI_FILE_READ_ONLY;
+ }
+
+ //
+ // A hard link count greater than 1 is not supported for regular files.
+ //
+ if ((FileInfo->Attribute & EFI_FILE_DIRECTORY) == 0 && FuseAttr->Nlink > 1) {
+ return EFI_UNSUPPORTED;
+ }
+
+ return EFI_SUCCESS;
+}
diff --git a/OvmfPkg/VirtioFsDxe/VirtioFsDxe.h b/OvmfPkg/VirtioFsDxe/VirtioFsDxe.h index 795cf4e..6cc5257 100644 --- a/OvmfPkg/VirtioFsDxe/VirtioFsDxe.h +++ b/OvmfPkg/VirtioFsDxe/VirtioFsDxe.h @@ -11,6 +11,7 @@ #define VIRTIO_FS_DXE_H_
#include <Base.h> // SIGNATURE_64()
+#include <Guid/FileInfo.h> // EFI_FILE_INFO
#include <IndustryStandard/VirtioFs.h> // VIRTIO_FS_TAG_BYTES
#include <Library/DebugLib.h> // CR()
#include <Protocol/SimpleFileSystem.h> // EFI_SIMPLE_FILE_SYSTEM_PROTOCOL
@@ -225,6 +226,12 @@ VirtioFsAppendPath ( OUT BOOLEAN *RootEscape
);
+EFI_STATUS
+VirtioFsFuseAttrToEfiFileInfo (
+ IN VIRTIO_FS_FUSE_ATTRIBUTES_RESPONSE *FuseAttr,
+ OUT EFI_FILE_INFO *FileInfo
+ );
+
//
// Wrapper functions for FUSE commands (primitives).
//
diff --git a/OvmfPkg/VirtioFsDxe/VirtioFsDxe.inf b/OvmfPkg/VirtioFsDxe/VirtioFsDxe.inf index b942baa..7d72721 100644 --- a/OvmfPkg/VirtioFsDxe/VirtioFsDxe.inf +++ b/OvmfPkg/VirtioFsDxe/VirtioFsDxe.inf @@ -77,6 +77,7 @@ ENTRY_POINT = VirtioFsEntryPoint
[Packages]
+ EmbeddedPkg/EmbeddedPkg.dec
MdePkg/MdePkg.dec
OvmfPkg/OvmfPkg.dec
@@ -110,6 +111,7 @@ BaseMemoryLib
DebugLib
MemoryAllocationLib
+ TimeBaseLib
UefiBootServicesTableLib
UefiDriverEntryPoint
VirtioLib
|