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| author | Laszlo Ersek <lersek@redhat.com> | 2020-12-16 22:11:08 +0100 |
|---|---|---|
| committer | mergify[bot] <37929162+mergify[bot]@users.noreply.github.com> | 2020-12-21 17:16:23 +0000 |
| commit | c4edb49b4f074f8d22a9c5e8f337dc29658de01c (patch) | |
| tree | 7c8c1dc9c66994aa9f1b62da261722e8124bc89c /OvmfPkg/VirtioFsDxe/SimpleFsSetPosition.c | |
| parent | b6b240f94f586126afce661f89871fecfff7d12a (diff) | |
| download | edk2-c4edb49b4f074f8d22a9c5e8f337dc29658de01c.tar.gz edk2-c4edb49b4f074f8d22a9c5e8f337dc29658de01c.tar.bz2 edk2-c4edb49b4f074f8d22a9c5e8f337dc29658de01c.zip | |
OvmfPkg/VirtioFsDxe: implement EFI_FILE_PROTOCOL.GetPosition, .SetPosition
Using the functions introduced previously, we can now implement
VirtioFsSimpleFileGetPosition() and VirtioFsSimpleFileSetPosition().
Cc: Ard Biesheuvel <ard.biesheuvel@arm.com>
Cc: Jordan Justen <jordan.l.justen@intel.com>
Cc: Philippe Mathieu-Daudé <philmd@redhat.com>
Ref: https://bugzilla.tianocore.org/show_bug.cgi?id=3097
Signed-off-by: Laszlo Ersek <lersek@redhat.com>
Message-Id: <20201216211125.19496-32-lersek@redhat.com>
Acked-by: Ard Biesheuvel <ard.biesheuvel@arm.com>
Diffstat (limited to 'OvmfPkg/VirtioFsDxe/SimpleFsSetPosition.c')
| -rw-r--r-- | OvmfPkg/VirtioFsDxe/SimpleFsSetPosition.c | 40 |
1 files changed, 39 insertions, 1 deletions
diff --git a/OvmfPkg/VirtioFsDxe/SimpleFsSetPosition.c b/OvmfPkg/VirtioFsDxe/SimpleFsSetPosition.c index ee8cb1f4e4..ac62853026 100644 --- a/OvmfPkg/VirtioFsDxe/SimpleFsSetPosition.c +++ b/OvmfPkg/VirtioFsDxe/SimpleFsSetPosition.c @@ -16,5 +16,43 @@ VirtioFsSimpleFileSetPosition ( IN UINT64 Position
)
{
- return EFI_DEVICE_ERROR;
+ VIRTIO_FS_FILE *VirtioFsFile;
+ VIRTIO_FS *VirtioFs;
+ EFI_STATUS Status;
+ VIRTIO_FS_FUSE_ATTRIBUTES_RESPONSE FuseAttr;
+
+ VirtioFsFile = VIRTIO_FS_FILE_FROM_SIMPLE_FILE (This);
+
+ //
+ // Directories can only be rewound, per spec.
+ //
+ if (VirtioFsFile->IsDirectory) {
+ if (Position != 0) {
+ return EFI_UNSUPPORTED;
+ }
+ VirtioFsFile->FilePosition = 0;
+ return EFI_SUCCESS;
+ }
+
+ //
+ // Regular file.
+ //
+ if (Position < MAX_UINT64) {
+ //
+ // Caller is requesting absolute file position.
+ //
+ VirtioFsFile->FilePosition = Position;
+ return EFI_SUCCESS;
+ }
+
+ //
+ // Caller is requesting a seek to EOF.
+ //
+ VirtioFs = VirtioFsFile->OwnerFs;
+ Status = VirtioFsFuseGetAttr (VirtioFs, VirtioFsFile->NodeId, &FuseAttr);
+ if (EFI_ERROR (Status)) {
+ return Status;
+ }
+ VirtioFsFile->FilePosition = FuseAttr.Size;
+ return EFI_SUCCESS;
}
|