OvmfPkg/VirtioFsDxe: implement the wrapper function for FUSE_CREATE

Add the VirtioFsFuseOpenOrCreate() function, for sending the FUSE_CREATE
command to the Virtio Filesystem device.

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: <20201216211125.19496-21-lersek@redhat.com>
Acked-by: Ard Biesheuvel <ard.biesheuvel@arm.com>

1 files changed, 17 insertions, 0 deletions

diff --git a/OvmfPkg/Include/IndustryStandard/VirtioFs.h b/OvmfPkg/Include/IndustryStandard/VirtioFs.h
index 9ffeb9c8c9..63aced229e 100644
--- a/OvmfPkg/Include/IndustryStandard/VirtioFs.h
+++ b/OvmfPkg/Include/IndustryStandard/VirtioFs.h
@@ -85,8 +85,14 @@ typedef struct {
 // File mode bitmasks.

 //

 #define VIRTIO_FS_FUSE_MODE_PERM_RWXU 0000700u

+#define VIRTIO_FS_FUSE_MODE_PERM_RUSR 0000400u

+#define VIRTIO_FS_FUSE_MODE_PERM_WUSR 0000200u

 #define VIRTIO_FS_FUSE_MODE_PERM_RWXG 0000070u

+#define VIRTIO_FS_FUSE_MODE_PERM_RGRP 0000040u

+#define VIRTIO_FS_FUSE_MODE_PERM_WGRP 0000020u

 #define VIRTIO_FS_FUSE_MODE_PERM_RWXO 0000007u

+#define VIRTIO_FS_FUSE_MODE_PERM_ROTH 0000004u

+#define VIRTIO_FS_FUSE_MODE_PERM_WOTH 0000002u

 

 //

 // Flags for VirtioFsFuseOpOpen.

@@ -108,6 +114,7 @@ typedef enum {
   VirtioFsFuseOpOpenDir     = 27,

   VirtioFsFuseOpReleaseDir  = 29,

   VirtioFsFuseOpFsyncDir    = 30,

+  VirtioFsFuseOpCreate      = 35,

 } VIRTIO_FS_FUSE_OPCODE;

 

 #pragma pack (1)

@@ -251,6 +258,16 @@ typedef struct {
   UINT16 MapAlignment;

   UINT32 Unused[8];

 } VIRTIO_FS_FUSE_INIT_RESPONSE;

+

+//

+// Header for VirtioFsFuseOpCreate.

+//

+typedef struct {

+  UINT32 Flags;

+  UINT32 Mode;

+  UINT32 Umask;

+  UINT32 Padding;

+} VIRTIO_FS_FUSE_CREATE_REQUEST;

 #pragma pack ()

 

 #endif // VIRTIO_FS_H_