OvmfPkg/VirtioFsDxe: submit the FUSE_INIT request to the device

Submit the FUSE_INIT request to the Virtio Filesystem device, for starting
the FUSE session.

The FUSE_INIT request is logged by the virtio-fs daemon, with this patch
applied, when (for example) using the "CONNECT" UEFI shell command.

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: <20201216211125.19496-9-lersek@redhat.com>
Acked-by: Ard Biesheuvel <ard.biesheuvel@arm.com>

1 files changed, 31 insertions, 0 deletions

diff --git a/OvmfPkg/Include/IndustryStandard/VirtioFs.h b/OvmfPkg/Include/IndustryStandard/VirtioFs.h
index 521288b03f..006e0f5deb 100644
--- a/OvmfPkg/Include/IndustryStandard/VirtioFs.h
+++ b/OvmfPkg/Include/IndustryStandard/VirtioFs.h
@@ -76,6 +76,13 @@ typedef struct {
 #define VIRTIO_FS_FUSE_MAJOR  7

 #define VIRTIO_FS_FUSE_MINOR 31

 

+//

+// FUSE operation codes.

+//

+typedef enum {

+  VirtioFsFuseOpInit        = 26,

+} VIRTIO_FS_FUSE_OPCODE;

+

 #pragma pack (1)

 //

 // Request-response headers common to all request types.

@@ -96,6 +103,30 @@ typedef struct {
   INT32  Error;

   UINT64 Unique;

 } VIRTIO_FS_FUSE_RESPONSE;

+

+//

+// Headers for VirtioFsFuseOpInit.

+//

+typedef struct {

+  UINT32 Major;

+  UINT32 Minor;

+  UINT32 MaxReadahead;

+  UINT32 Flags;

+} VIRTIO_FS_FUSE_INIT_REQUEST;

+

+typedef struct {

+  UINT32 Major;

+  UINT32 Minor;

+  UINT32 MaxReadahead;

+  UINT32 Flags;

+  UINT16 MaxBackground;

+  UINT16 CongestionThreshold;

+  UINT32 MaxWrite;

+  UINT32 TimeGran;

+  UINT16 MaxPages;

+  UINT16 MapAlignment;

+  UINT32 Unused[8];

+} VIRTIO_FS_FUSE_INIT_RESPONSE;

 #pragma pack ()

 

 #endif // VIRTIO_FS_H_