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virtio-devices: modify or provide safety comments

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Signed-off-by: Wei Liu <liuwe@microsoft.com>
This commit is contained in:
Wei Liu
2022-11-16 22:42:25 +00:00
committed by Liu Wei
parent f110029acf
commit c45d24df16
12 changed files with 41 additions and 9 deletions
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virtio-devices/src/vsock/packet.rs
+5 -4
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@@ -239,7 +239,7 @@ impl VsockPacket {
/// Provides in-place, byte-slice, access to the vsock packet header.
///
pub fn hdr(&self) -> &[u8] {
// This is safe since bound checks have already been performed when creating the packet
// SAFETY: bound checks have already been performed when creating the packet
// from the virtq descriptor.
unsafe { std::slice::from_raw_parts(self.hdr as *const u8, VSOCK_PKT_HDR_SIZE) }
}
@@ -247,7 +247,7 @@ impl VsockPacket {
/// Provides in-place, byte-slice, mutable access to the vsock packet header.
///
pub fn hdr_mut(&mut self) -> &mut [u8] {
// This is safe since bound checks have already been performed when creating the packet
// SAFETY: bound checks have already been performed when creating the packet
// from the virtq descriptor.
unsafe { std::slice::from_raw_parts_mut(self.hdr, VSOCK_PKT_HDR_SIZE) }
}
@@ -261,7 +261,7 @@ impl VsockPacket {
/// is stored in the packet header, and accessible via `VsockPacket::len()`.
pub fn buf(&self) -> Option<&[u8]> {
self.buf.map(|ptr| {
// This is safe since bound checks have already been performed when creating the packet
// SAFETY: bound checks have already been performed when creating the packet
// from the virtq descriptor.
unsafe { std::slice::from_raw_parts(ptr as *const u8, self.buf_size) }
})
@@ -276,7 +276,7 @@ impl VsockPacket {
/// is stored in the packet header, and accessible via `VsockPacket::len()`.
pub fn buf_mut(&mut self) -> Option<&mut [u8]> {
self.buf.map(|ptr| {
// This is safe since bound checks have already been performed when creating the packet
// SAFETY: bound checks have already been performed when creating the packet
// from the virtq descriptor.
unsafe { std::slice::from_raw_parts_mut(ptr, self.buf_size) }
})
@@ -383,6 +383,7 @@ impl VsockPacket {
}
#[cfg(test)]
#[allow(clippy::undocumented_unsafe_blocks)]
mod tests {
use super::super::tests::TestContext;
use super::*;