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From: Song Liu <song@kernel.org>
To: <bpf@vger.kernel.org>
Cc: <ast@kernel.org>, <daniel@iogearbox.net>, <andrii@kernel.org>,
	<martin.lau@kernel.org>, <kernel-team@meta.com>,
	<iii@linux.ibm.com>, <bjorn@kernel.org>,
	Song Liu <song@kernel.org>
Subject: [PATCH v3 bpf-next 3/8] bpf: Adjust argument names of arch_prepare_bpf_trampoline()
Date: Tue, 26 Sep 2023 12:00:15 -0700	[thread overview]
Message-ID: <20230926190020.1111575-4-song@kernel.org> (raw)
In-Reply-To: <20230926190020.1111575-1-song@kernel.org>

We are using "im" for "struct bpf_tramp_image" and "tr" for "struct
bpf_trampoline" in most of the code base. The only exception is the
prototype and fallback version of arch_prepare_bpf_trampoline(). Update
them to match the rest of the code base.

We mix "orig_call" and "func_addr" for the argument in different versions
of arch_prepare_bpf_trampoline(). s/orig_call/func_addr/g so they match.

Signed-off-by: Song Liu <song@kernel.org>
Acked-by: Ilya Leoshkevich <iii@linux.ibm.com>
Tested-by: Ilya Leoshkevich <iii@linux.ibm.com>  # on s390x
---
 arch/arm64/net/bpf_jit_comp.c | 10 +++++-----
 include/linux/bpf.h           |  4 ++--
 kernel/bpf/trampoline.c       |  4 ++--
 3 files changed, 9 insertions(+), 9 deletions(-)

diff --git a/arch/arm64/net/bpf_jit_comp.c b/arch/arm64/net/bpf_jit_comp.c
index 7d4af64e3982..d81b886ea4df 100644
--- a/arch/arm64/net/bpf_jit_comp.c
+++ b/arch/arm64/net/bpf_jit_comp.c
@@ -1828,7 +1828,7 @@ static void restore_args(struct jit_ctx *ctx, int args_off, int nregs)
  *
  */
 static int prepare_trampoline(struct jit_ctx *ctx, struct bpf_tramp_image *im,
-			      struct bpf_tramp_links *tlinks, void *orig_call,
+			      struct bpf_tramp_links *tlinks, void *func_addr,
 			      int nregs, u32 flags)
 {
 	int i;
@@ -1926,7 +1926,7 @@ static int prepare_trampoline(struct jit_ctx *ctx, struct bpf_tramp_image *im,
 
 	if (flags & BPF_TRAMP_F_IP_ARG) {
 		/* save ip address of the traced function */
-		emit_addr_mov_i64(A64_R(10), (const u64)orig_call, ctx);
+		emit_addr_mov_i64(A64_R(10), (const u64)func_addr, ctx);
 		emit(A64_STR64I(A64_R(10), A64_SP, ip_off), ctx);
 	}
 
@@ -2029,7 +2029,7 @@ static int prepare_trampoline(struct jit_ctx *ctx, struct bpf_tramp_image *im,
 int arch_prepare_bpf_trampoline(struct bpf_tramp_image *im, void *image,
 				void *image_end, const struct btf_func_model *m,
 				u32 flags, struct bpf_tramp_links *tlinks,
-				void *orig_call)
+				void *func_addr)
 {
 	int i, ret;
 	int nregs = m->nr_args;
@@ -2050,7 +2050,7 @@ int arch_prepare_bpf_trampoline(struct bpf_tramp_image *im, void *image,
 	if (nregs > 8)
 		return -ENOTSUPP;
 
-	ret = prepare_trampoline(&ctx, im, tlinks, orig_call, nregs, flags);
+	ret = prepare_trampoline(&ctx, im, tlinks, func_addr, nregs, flags);
 	if (ret < 0)
 		return ret;
 
@@ -2061,7 +2061,7 @@ int arch_prepare_bpf_trampoline(struct bpf_tramp_image *im, void *image,
 	ctx.idx = 0;
 
 	jit_fill_hole(image, (unsigned int)(image_end - image));
-	ret = prepare_trampoline(&ctx, im, tlinks, orig_call, nregs, flags);
+	ret = prepare_trampoline(&ctx, im, tlinks, func_addr, nregs, flags);
 
 	if (ret > 0 && validate_code(&ctx) < 0)
 		ret = -EINVAL;
diff --git a/include/linux/bpf.h b/include/linux/bpf.h
index a82efd34b741..f90339c26c4e 100644
--- a/include/linux/bpf.h
+++ b/include/linux/bpf.h
@@ -1079,10 +1079,10 @@ struct bpf_tramp_run_ctx;
  *      fexit = a set of program to run after original function
  */
 struct bpf_tramp_image;
-int arch_prepare_bpf_trampoline(struct bpf_tramp_image *tr, void *image, void *image_end,
+int arch_prepare_bpf_trampoline(struct bpf_tramp_image *im, void *image, void *image_end,
 				const struct btf_func_model *m, u32 flags,
 				struct bpf_tramp_links *tlinks,
-				void *orig_call);
+				void *func_addr);
 u64 notrace __bpf_prog_enter_sleepable_recur(struct bpf_prog *prog,
 					     struct bpf_tramp_run_ctx *run_ctx);
 void notrace __bpf_prog_exit_sleepable_recur(struct bpf_prog *prog, u64 start,
diff --git a/kernel/bpf/trampoline.c b/kernel/bpf/trampoline.c
index e97aeda3a86b..e114a1c7961e 100644
--- a/kernel/bpf/trampoline.c
+++ b/kernel/bpf/trampoline.c
@@ -1032,10 +1032,10 @@ bpf_trampoline_exit_t bpf_trampoline_exit(const struct bpf_prog *prog)
 }
 
 int __weak
-arch_prepare_bpf_trampoline(struct bpf_tramp_image *tr, void *image, void *image_end,
+arch_prepare_bpf_trampoline(struct bpf_tramp_image *im, void *image, void *image_end,
 			    const struct btf_func_model *m, u32 flags,
 			    struct bpf_tramp_links *tlinks,
-			    void *orig_call)
+			    void *func_addr)
 {
 	return -ENOTSUPP;
 }
-- 
2.34.1


  parent reply	other threads:[~2023-09-26 19:00 UTC|newest]

Thread overview: 14+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2023-09-26 19:00 [PATCH v3 bpf-next 0/8] Allocate bpf trampoline on bpf_prog_pack Song Liu
2023-09-26 19:00 ` [PATCH v3 bpf-next 1/8] s390/bpf: Let arch_prepare_bpf_trampoline return program size Song Liu
2023-09-26 19:00 ` [PATCH v3 bpf-next 2/8] bpf: Let bpf_prog_pack_free handle any pointer Song Liu
2023-09-27 18:29   ` Björn Töpel
2023-09-26 19:00 ` Song Liu [this message]
2023-09-26 19:00 ` [PATCH v3 bpf-next 4/8] bpf: Add helpers for trampoline image management Song Liu
2023-09-26 19:00 ` [PATCH v3 bpf-next 5/8] bpf, x86: Adjust arch_prepare_bpf_trampoline return value Song Liu
2023-09-26 19:00 ` [PATCH v3 bpf-next 6/8] bpf: Add arch_bpf_trampoline_size() Song Liu
2023-09-26 19:00 ` [PATCH v3 bpf-next 7/8] bpf: Use arch_bpf_trampoline_size Song Liu
2023-09-26 19:00 ` [PATCH v3 bpf-next 8/8] x86, bpf: Use bpf_prog_pack for bpf trampoline Song Liu
2023-09-27 13:16   ` Jiri Olsa
2023-09-27 15:47     ` Song Liu
2023-10-04 15:40 ` [PATCH v3 bpf-next 0/8] Allocate bpf trampoline on bpf_prog_pack patchwork-bot+netdevbpf
2023-10-04 15:50   ` Alexei Starovoitov

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