[PATCH v3] rust: net: netlink: Migrate to zerocopy's IntoBytes
flat view
COLD25d
IN NET-NEXT: 5 (5M)
From: Sagar Taunk <hidden>
Date: 2026-09-15 14:42:52
Also in:
lkml, rust-for-linux
Subsystem:
networking [general], rust, the rest · Maintainers:
"David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Miguel Ojeda, Linus Torvalds
1 review trailer (1 from subsystem maintainers); queued in net-next as 5e5916923759 on 2026-09-18.
Replace the kernel's own `transmute::FromBytes` and `AsBytes` traits with their zerocopy equivalents. Specifically, this updates `GenlMsg::put` to rely on `IntoBytes` for converting attributes into byte slices. Also, add `Immutable` trait bound on `GenlMsg::put` as zerocopy splits the `no interior mutability` guarantee that `AsBytes` bundled together. Link: https://github.com/Rust-for-Linux/linux/issues/1241 Signed-off-by: Sagar Taunk <redacted> Reviewed-by: Alexandre Courbot <acourbot@nvidia.com> --- Changes Since V2: Follow vertical import style as told by Alexandre Courbot. No functional changes. rust/kernel/net/netlink.rs | 8 ++++++-- 1 file changed, 6 insertions(+), 2 deletions(-)
diff --git a/rust/kernel/net/netlink.rs b/rust/kernel/net/netlink.rs
index 22ef3dde36fa..a2f4bd171dcf 100644
--- a/rust/kernel/net/netlink.rs
+++ b/rust/kernel/net/netlink.rs@@ -12,7 +12,6 @@ alloc::{self, AllocError}, error::to_result, prelude::*, - transmute::AsBytes, types::Opaque, ThisModule, };
@@ -22,6 +21,11 @@ ptr::NonNull, // }; +use zerocopy::{ + Immutable, + IntoBytes, // +}; + /// The default netlink message size. pub const GENLMSG_DEFAULT_SIZE: usize = bindings::GENLMSG_DEFAULT_SIZE;
@@ -84,7 +88,7 @@ impl GenlMsg { #[inline] fn put<T>(&mut self, attrtype: c_int, value: &T) -> Result where - T: ?Sized + AsBytes, + T: ?Sized + IntoBytes + Immutable, { let skb = self.skb.skb.as_ptr(); let len = size_of_val(value);
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2.55.0