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Message-Id: <20231022.153009.202146429329494922.fujita.tomonori@gmail.com>
Date: Sun, 22 Oct 2023 15:30:09 +0900 (JST)
From: FUJITA Tomonori <fujita.tomonori@...il.com>
To: miguel.ojeda.sandonis@...il.com
Cc: fujita.tomonori@...il.com, nmi@...aspace.dk, netdev@...r.kernel.org,
rust-for-linux@...r.kernel.org, andrew@...n.ch, tmgross@...ch.edu,
boqun.feng@...il.com, wedsonaf@...il.com, benno.lossin@...ton.me,
greg@...ah.com, ojeda@...nel.org
Subject: Re: [PATCH net-next v5 3/5] WIP rust: add second `bindgen` pass
for enum exhaustiveness checking
On Sat, 21 Oct 2023 14:05:53 +0200
Miguel Ojeda <miguel.ojeda.sandonis@...il.com> wrote:
> On Sat, Oct 21, 2023 at 5:51 AM FUJITA Tomonori
> <fujita.tomonori@...il.com> wrote:
>>
>> Hmm, this works for me.
>
> Andreas was probably using `O=`, but you were not.
>
> At least that is what I guessed yesterday and what the suggestion I gave fixes.
I see, thanks.
> This is also why sending unfinished work by someone else is not the
> best idea. I would also have marked that patch as RFC and put it at
> the end perhaps, to make it clearer.
>
> By the way, the patch is missing your SoB. I would recommend using
> `--signoff` in Git and b4's `am`, `cherry-pick` etc.
Incorporated the Makefile fix and added my Signed-off-by. You would
like to keep WIP in the subject?
=
From ff5b567a8b4e4a48f8a0c7f1ac71f8ef2c2ed226 Mon Sep 17 00:00:00 2001
From: Miguel Ojeda <ojeda@...nel.org>
Date: Fri, 13 Oct 2023 12:37:58 +0200
Subject: [PATCH] WIP rust: add second `bindgen` pass for enum exhaustiveness
checking
error[E0005]: refutable pattern in function argument
--> rust/bindings/bindings_enum_check.rs:29:6
|
29 | (phy_state::PHY_DOWN
| ______^
30 | | | phy_state::PHY_READY
31 | | | phy_state::PHY_HALTED
32 | | | phy_state::PHY_ERROR
... |
35 | | | phy_state::PHY_NOLINK
36 | | | phy_state::PHY_CABLETEST): phy_state,
| |______________________________^ pattern `phy_state::PHY_NEW` not covered
|
note: `phy_state` defined here
--> rust/bindings/bindings_generated_enum_check.rs:60739:10
|
60739 | pub enum phy_state {
| ^^^^^^^^^
...
60745 | PHY_NEW = 5,
| ------- not covered
= note: the matched value is of type `phy_state`
Signed-off-by: Miguel Ojeda <ojeda@...nel.org>
Signed-off-by: FUJITA Tomonori <fujita.tomonori@...il.com>
---
rust/.gitignore | 1 +
rust/Makefile | 14 +++++++++++
rust/bindings/bindings_enum_check.rs | 36 ++++++++++++++++++++++++++++
3 files changed, 51 insertions(+)
create mode 100644 rust/bindings/bindings_enum_check.rs
diff --git a/rust/.gitignore b/rust/.gitignore
index d3829ffab80b..1a76ad0d6603 100644
--- a/rust/.gitignore
+++ b/rust/.gitignore
@@ -1,6 +1,7 @@
# SPDX-License-Identifier: GPL-2.0
bindings_generated.rs
+bindings_generated_enum_check.rs
bindings_helpers_generated.rs
doctests_kernel_generated.rs
doctests_kernel_generated_kunit.c
diff --git a/rust/Makefile b/rust/Makefile
index a27f35f924ec..b37842120b74 100644
--- a/rust/Makefile
+++ b/rust/Makefile
@@ -15,6 +15,7 @@ always-$(CONFIG_RUST) += libmacros.so
no-clean-files += libmacros.so
always-$(CONFIG_RUST) += bindings/bindings_generated.rs bindings/bindings_helpers_generated.rs
+always-$(CONFIG_RUST) += bindings/bindings_generated_enum_check.rs
obj-$(CONFIG_RUST) += alloc.o bindings.o kernel.o
always-$(CONFIG_RUST) += exports_alloc_generated.h exports_bindings_generated.h \
exports_kernel_generated.h
@@ -341,6 +342,19 @@ $(obj)/bindings/bindings_generated.rs: $(src)/bindings/bindings_helper.h \
$(src)/bindgen_parameters FORCE
$(call if_changed_dep,bindgen)
+$(obj)/bindings/bindings_generated_enum_check.rs: private bindgen_target_flags = \
+ $(shell grep -v '^#\|^$$' $(srctree)/$(src)/bindgen_parameters) \
+ --default-enum-style rust
+$(obj)/bindings/bindings_generated_enum_check.rs: private bindgen_target_extra = ; \
+ OBJTREE=$(abspath $(objtree)) $(RUSTC_OR_CLIPPY) $(rust_flags) $(rustc_target_flags) \
+ --crate-type rlib -L$(objtree)/$(obj) \
+ --emit=dep-info=$(obj)/bindings/.bindings_enum_check.rs.d \
+ --emit=metadata=$(obj)/bindings/libbindings_enum_check.rmeta \
+ --crate-name enum_check $(srctree)/$(src)/bindings/bindings_enum_check.rs
+$(obj)/bindings/bindings_generated_enum_check.rs: $(src)/bindings/bindings_helper.h \
+ $(src)/bindings/bindings_enum_check.rs $(src)/bindgen_parameters FORCE
+ $(call if_changed_dep,bindgen)
+
$(obj)/uapi/uapi_generated.rs: private bindgen_target_flags = \
$(shell grep -Ev '^#|^$$' $(srctree)/$(src)/bindgen_parameters)
$(obj)/uapi/uapi_generated.rs: $(src)/uapi/uapi_helper.h \
diff --git a/rust/bindings/bindings_enum_check.rs b/rust/bindings/bindings_enum_check.rs
new file mode 100644
index 000000000000..eef7e9ca3c54
--- /dev/null
+++ b/rust/bindings/bindings_enum_check.rs
@@ -0,0 +1,36 @@
+// SPDX-License-Identifier: GPL-2.0
+
+//! Bindings' enum exhaustiveness check.
+//!
+//! Eventually, this should be replaced by a safe version of `--rustified-enum`, see
+//! https://github.com/rust-lang/rust-bindgen/issues/2646.
+
+#![no_std]
+#![allow(
+ clippy::all,
+ dead_code,
+ missing_docs,
+ non_camel_case_types,
+ non_upper_case_globals,
+ non_snake_case,
+ improper_ctypes,
+ unreachable_pub,
+ unsafe_op_in_unsafe_fn
+)]
+
+include!(concat!(
+ env!("OBJTREE"),
+ "/rust/bindings/bindings_generated_enum_check.rs"
+));
+
+fn check_phy_state(
+ (phy_state::PHY_DOWN
+ | phy_state::PHY_READY
+ | phy_state::PHY_HALTED
+ | phy_state::PHY_ERROR
+ | phy_state::PHY_UP
+ | phy_state::PHY_RUNNING
+ | phy_state::PHY_NOLINK
+ | phy_state::PHY_CABLETEST): phy_state,
+) {
+}
--
2.34.1
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