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Message-ID: <20241005122531.20298-2-fujita.tomonori@gmail.com>
Date: Sat, 5 Oct 2024 21:25:26 +0900
From: FUJITA Tomonori <fujita.tomonori@...il.com>
To: netdev@...r.kernel.org
Cc: rust-for-linux@...r.kernel.org,
andrew@...n.ch,
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Subject: [PATCH net-next v2 1/6] rust: time: Implement PartialEq and PartialOrd for Ktime
Implement PartialEq and PartialOrd trait for Ktime by using C's
ktime_compare function so two Ktime instances can be compared to
determine whether a timeout is met or not.
Signed-off-by: FUJITA Tomonori <fujita.tomonori@...il.com>
---
rust/helpers/helpers.c | 1 +
rust/helpers/time.c | 8 ++++++++
rust/kernel/time.rs | 22 ++++++++++++++++++++++
3 files changed, 31 insertions(+)
create mode 100644 rust/helpers/time.c
diff --git a/rust/helpers/helpers.c b/rust/helpers/helpers.c
index 30f40149f3a9..c274546bcf78 100644
--- a/rust/helpers/helpers.c
+++ b/rust/helpers/helpers.c
@@ -21,6 +21,7 @@
#include "slab.c"
#include "spinlock.c"
#include "task.c"
+#include "time.c"
#include "uaccess.c"
#include "wait.c"
#include "workqueue.c"
diff --git a/rust/helpers/time.c b/rust/helpers/time.c
new file mode 100644
index 000000000000..d6f61affb2c3
--- /dev/null
+++ b/rust/helpers/time.c
@@ -0,0 +1,8 @@
+// SPDX-License-Identifier: GPL-2.0
+
+#include <linux/ktime.h>
+
+int rust_helper_ktime_compare(const ktime_t cmp1, const ktime_t cmp2)
+{
+ return ktime_compare(cmp1, cmp2);
+}
diff --git a/rust/kernel/time.rs b/rust/kernel/time.rs
index e3bb5e89f88d..c40105941a2c 100644
--- a/rust/kernel/time.rs
+++ b/rust/kernel/time.rs
@@ -81,3 +81,25 @@ fn sub(self, other: Ktime) -> Ktime {
}
}
}
+
+impl PartialEq for Ktime {
+ #[inline]
+ fn eq(&self, other: &Self) -> bool {
+ // SAFETY: FFI call.
+ let ret = unsafe { bindings::ktime_compare(self.inner, other.inner) };
+ ret == 0
+ }
+}
+
+impl PartialOrd for Ktime {
+ #[inline]
+ fn partial_cmp(&self, other: &Self) -> Option<core::cmp::Ordering> {
+ // SAFETY: FFI call.
+ let ret = unsafe { bindings::ktime_compare(self.inner, other.inner) };
+ match ret {
+ 0 => Some(core::cmp::Ordering::Equal),
+ x if x < 0 => Some(core::cmp::Ordering::Less),
+ _ => Some(core::cmp::Ordering::Greater),
+ }
+ }
+}
--
2.34.1
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