From 5febf432df1cfa5b25d99b54c32103fafbdd0eb9 Mon Sep 17 00:00:00 2001 From: Miguel Ojeda Date: Sun, 16 Aug 2026 15:32:33 +0200 Subject: kbuild: rust: keep Rust objects out of Clang LTO with inline helpers Under `CONFIG_LTO_CLANG` + `CONFIG_RUST_INLINE_HELPERS`, one may hit `objtool` errors such as: vmlinux.o: error: objtool: _R..._3Gsp4boot+0xd6a: can't find jump dest instruction at .text._R..._3Gsp4boot+0x1dfd The reason is that in such builds, the Clang invocation that compiles the combined Rust plus helpers bitcode emits LLVM bitcode (again) -- the final code generation happens in the linker's LTO step, which the `-mllvm` trap options passed to Clang do not reach. This, in turn, means that unreachable traps are missing, and the impossible paths do not merely fallthrough to the next symbol, but past the end of their own section, since LTO builds place each function in its own section. Thus filter `CC_FLAGS_LTO` out of the Clang invocation, so that it always emits machine code directly, with the traps in place. Assisted-by: LLM Cc: Gary Guo Cc: Boqun Feng Cc: Alice Ryhl Cc: Matthew Maurer Cc: Josh Poimboeuf Cc: Peter Zijlstra Cc: stable@vger.kernel.org Fixes: 3a2486cc1da5 ("kbuild: rust: provide an option to inline C helpers into Rust") Acked-by: Gary Guo Link: https://patch.msgid.link/20260816133233.197500-2-ojeda@kernel.org Signed-off-by: Miguel Ojeda --- net/ceph/auth_x.h | 54 ++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 54 insertions(+) create mode 100644 net/ceph/auth_x.h (limited to 'net/ceph/auth_x.h') diff --git a/net/ceph/auth_x.h b/net/ceph/auth_x.h new file mode 100644 index 000000000..c03735f96 --- /dev/null +++ b/net/ceph/auth_x.h @@ -0,0 +1,54 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +#ifndef _FS_CEPH_AUTH_X_H +#define _FS_CEPH_AUTH_X_H + +#include + +#include + +#include "crypto.h" +#include "auth_x_protocol.h" + +/* + * Handle ticket for a single service. + */ +struct ceph_x_ticket_handler { + struct rb_node node; + unsigned int service; + + struct ceph_crypto_key session_key; + bool have_key; + + u64 secret_id; + struct ceph_buffer *ticket_blob; + + time64_t renew_after, expires; +}; + +#define CEPHX_AU_ENC_BUF_LEN 128 /* big enough for encrypted blob */ + +struct ceph_x_authorizer { + struct ceph_authorizer base; + struct ceph_crypto_key session_key; + struct ceph_buffer *buf; + unsigned int service; + u64 nonce; + u64 secret_id; + char enc_buf[CEPHX_AU_ENC_BUF_LEN] __aligned(8); +}; + +struct ceph_x_info { + struct ceph_crypto_key secret; + + bool starting; + u64 server_challenge; + + unsigned int have_keys; + struct rb_root ticket_handlers; + + struct ceph_x_authorizer auth_authorizer; +}; + +int ceph_x_init(struct ceph_auth_client *ac); + +#endif -- cgit v1.3.1