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Diffstat (limited to 'devices/src/virtio/queue.rs')
| -rw-r--r-- | devices/src/virtio/queue.rs | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/devices/src/virtio/queue.rs b/devices/src/virtio/queue.rs index 59b09b7..702c100 100644 --- a/devices/src/virtio/queue.rs +++ b/devices/src/virtio/queue.rs @@ -103,6 +103,14 @@ impl<'a> DescriptorChain<'a> { self.flags & VIRTQ_DESC_F_WRITE != 0 } + /// If the driver designated this as a read only descriptor. + /// + /// If this is false, this descriptor is write only. + /// Read only means the emulated device can read and the driver can write. + pub fn is_read_only(&self) -> bool { + self.flags & VIRTQ_DESC_F_WRITE == 0 + } + /// Gets the next descriptor in this descriptor chain, if there is one. /// /// Note that this is distinct from the next descriptor chain returned by `AvailIter`, which is |