Implement statx.

We don't have the plumbing for btime yet, so that field is left off. The
returned mask indicates that btime is absent.

Fixes #343

PiperOrigin-RevId: 254575752

1 files changed, 22 insertions, 0 deletions

diff --git a/pkg/sentry/fs/attr.go b/pkg/sentry/fs/attr.go
index 1d9d7454a..9fc6a5bc2 100644
--- a/pkg/sentry/fs/attr.go
+++ b/pkg/sentry/fs/attr.go
@@ -89,6 +89,28 @@ func (n InodeType) String() string {
 	}
 }
 
+// LinuxType returns the linux file type for this inode type.
+func (n InodeType) LinuxType() uint32 {
+	switch n {
+	case RegularFile, SpecialFile:
+		return linux.ModeRegular
+	case Directory, SpecialDirectory:
+		return linux.ModeDirectory
+	case Symlink:
+		return linux.ModeSymlink
+	case Pipe:
+		return linux.ModeNamedPipe
+	case CharacterDevice:
+		return linux.ModeCharacterDevice
+	case BlockDevice:
+		return linux.ModeBlockDevice
+	case Socket:
+		return linux.ModeSocket
+	default:
+		return 0
+	}
+}
+
 // StableAttr contains Inode attributes that will be stable throughout the
 // lifetime of the Inode.
 //