[LTP] [PATCH v2 0/2] Introduce SAFE_SPLICE()

[LTP] [PATCH v2 0/2] Introduce SAFE_SPLICE()

[Andrea Cervesato]

- add SAFE_SPLICE()
- update tests to use the new macro

Signed-off-by: Andrea Cervesato <andrea.cervesato@suse.com>
---
Changes in v2:
- fix compile issues by moving SAFE_SPLICE in lapi/splice.h
- Link to v1: https://lore.kernel.org/r/20260430-safe_splice-v1-0-d1d919ff2a3a@suse.com

---
Andrea Cervesato (2):
      lib: Add SAFE_SPLICE() macro
      tee01, vmsplice01, af_alg08: Use SAFE_SPLICE()

 include/lapi/splice.h                           | 28 +++++++++++++++++++++++++
 testcases/kernel/crypto/af_alg08.c              |  9 ++------
 testcases/kernel/syscalls/tee/tee01.c           | 10 +++------
 testcases/kernel/syscalls/vmsplice/vmsplice01.c |  5 +----
 4 files changed, 34 insertions(+), 18 deletions(-)
---
base-commit: 72ca484cca53710b956ba2fcc1ff203fe9c9b73b
change-id: 20260430-safe_splice-a3d6403f99cd

Best regards,
-- 
Andrea Cervesato <andrea.cervesato@suse.com>


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[LTP] [PATCH v2 1/2] lib: Add SAFE_SPLICE() macro

[Andrea Cervesato]

From: Andrea Cervesato <andrea.cervesato@suse.com>

Add new SAFE_SPLIT() in lapi/splice.h.

Signed-off-by: Andrea Cervesato <andrea.cervesato@suse.com>
---
 include/lapi/splice.h                           | 28 +++++++++++++++++++++++++
 testcases/kernel/crypto/af_alg08.c              | 10 ++-------
 testcases/kernel/syscalls/tee/tee01.c           |  9 ++------
 testcases/kernel/syscalls/vmsplice/vmsplice01.c |  6 +-----
 4 files changed, 33 insertions(+), 20 deletions(-)

diff --git a/include/lapi/splice.h b/include/lapi/splice.h
index 191b22d2d6397d1efad5e2025be5a2c4370724dc..e346e5cca9f44bd8421c6b99f84cd4646269ac1f 100644
--- a/include/lapi/splice.h
+++ b/include/lapi/splice.h
@@ -7,6 +7,13 @@
 #ifndef LAPI_SPLICE_H__
 #define LAPI_SPLICE_H__
 
+#ifndef _GNU_SOURCE
+# define _GNU_SOURCE
+#endif
+
+#include <fcntl.h>
+#include <sys/types.h>
+
 #include "config.h"
 #include "lapi/syscalls.h"
 
@@ -19,4 +26,25 @@ static inline ssize_t splice(int fd_in, loff_t *off_in, int fd_out,
 }
 #endif
 
+static inline ssize_t safe_splice(const char *file, const int lineno,
+				   int fd_in, loff_t *off_in,
+				   int fd_out, loff_t *off_out,
+				   size_t len, unsigned int flags)
+{
+	ssize_t ret;
+
+	ret = splice(fd_in, off_in, fd_out, off_out, len, flags);
+
+	if (ret < 0) {
+		tst_brk_(file, lineno, TBROK | TERRNO,
+			"splice(%d, %d, %zu) failed", fd_in, fd_out, len);
+	}
+
+	return ret;
+}
+
+#define SAFE_SPLICE(fd_in, off_in, fd_out, off_out, len, flags) \
+	safe_splice(__FILE__, __LINE__, (fd_in), (off_in), (fd_out), \
+		    (off_out), (len), (flags))
+
 #endif /* LAPI_SPLICE_H__ */
diff --git a/testcases/kernel/crypto/af_alg08.c b/testcases/kernel/crypto/af_alg08.c
index 4f27f3c9da7cc277926c6fe3eee1a4649a483763..05f17eea4797b7575c97e194e34c0390c6d6be22 100644
--- a/testcases/kernel/crypto/af_alg08.c
+++ b/testcases/kernel/crypto/af_alg08.c
@@ -27,7 +27,6 @@
 #include "tst_test.h"
 #include "tst_af_alg.h"
 #include "lapi/socket.h"
-#include "lapi/splice.h"
 
 #define TESTFILE "copy_fail"
 #define OVERWRITE_SIZE 4
@@ -92,13 +91,8 @@ static void try_corrupt(void)
 
 	SAFE_PIPE(pipefd);
 
-	TEST(splice(file_fd, &off_in, pipefd[1], NULL, OVERWRITE_SIZE, 0));
-	if (TST_RET < 0)
-		tst_brk(TBROK | TTERRNO, "splice(file -> pipe)");
-
-	TEST(splice(pipefd[0], NULL, reqfd, NULL, OVERWRITE_SIZE, 0));
-	if (TST_RET < 0)
-		tst_brk(TBROK | TTERRNO, "splice(pipe -> AF_ALG)");
+	SAFE_SPLICE(file_fd, &off_in, pipefd[1], NULL, OVERWRITE_SIZE, 0);
+	SAFE_SPLICE(pipefd[0], NULL, reqfd, NULL, OVERWRITE_SIZE, 0);
 
 	/* Expected to fail (invalid ciphertext); triggers the scratch write */
 	TST_EXP_FAIL_SILENT(recv(reqfd, recvbuf, sizeof(recvbuf), 0), EBADMSG);
diff --git a/testcases/kernel/syscalls/tee/tee01.c b/testcases/kernel/syscalls/tee/tee01.c
index d1489d0453f11faab41ab6e8e2dabbb372566f60..680793eb2b21cfd2609492d3be3bef10abb25acf 100644
--- a/testcases/kernel/syscalls/tee/tee01.c
+++ b/testcases/kernel/syscalls/tee/tee01.c
@@ -15,7 +15,6 @@
 #include "tst_test.h"
 #include "lapi/fcntl.h"
 #include "lapi/tee.h"
-#include "lapi/splice.h"
 
 #define TEST_BLOCK_SIZE 1024
 
@@ -58,17 +57,13 @@ static void tee_test(void)
 	SAFE_PIPE(pipe1);
 	SAFE_PIPE(pipe2);
 
-	ret = splice(fd_in, NULL, pipe1[1], NULL, TEST_BLOCK_SIZE, 0);
-	if (ret < 0)
-		tst_brk(TBROK | TERRNO, "splice(fd_in, pipe1) failed");
+	SAFE_SPLICE(fd_in, NULL, pipe1[1], NULL, TEST_BLOCK_SIZE, 0);
 
 	ret = tee(pipe1[0], pipe2[1], TEST_BLOCK_SIZE, SPLICE_F_NONBLOCK);
 	if (ret < 0)
 		tst_brk(TBROK | TERRNO, "tee() failed");
 
-	ret = splice(pipe2[0], NULL, fd_out, NULL, TEST_BLOCK_SIZE, 0);
-	if (ret < 0)
-		tst_brk(TBROK | TERRNO, "splice(pipe2, fd_out) failed");
+	SAFE_SPLICE(pipe2[0], NULL, fd_out, NULL, TEST_BLOCK_SIZE, 0);
 
 	SAFE_CLOSE(pipe2[0]);
 	SAFE_CLOSE(pipe2[1]);
diff --git a/testcases/kernel/syscalls/vmsplice/vmsplice01.c b/testcases/kernel/syscalls/vmsplice/vmsplice01.c
index 17486179baa2a897c2efbf0d2b4d39273788aadc..7b55e66a373d2d72824fbb9146b2af353a5ff1c9 100644
--- a/testcases/kernel/syscalls/vmsplice/vmsplice01.c
+++ b/testcases/kernel/syscalls/vmsplice/vmsplice01.c
@@ -15,7 +15,6 @@
 
 #include "tst_test.h"
 #include "lapi/fcntl.h"
-#include "lapi/splice.h"
 #include "lapi/vmsplice.h"
 
 #define TEST_BLOCK_SIZE (1<<17)	/* 128K */
@@ -50,7 +49,6 @@ static void vmsplice_test(void)
 {
 	int pipes[2];
 	long written;
-	int ret;
 	int fd_out;
 	struct iovec v;
 	loff_t offset;
@@ -85,9 +83,7 @@ static void vmsplice_test(void)
 			}
 		}
 
-		ret = splice(pipes[0], NULL, fd_out, &offset, written, 0);
-		if (ret < 0)
-			tst_brk(TBROK | TERRNO, "splice() failed");
+		SAFE_SPLICE(pipes[0], NULL, fd_out, &offset, written, 0);
 		//printf("offset = %lld\n", (long long)offset);
 	}
 

-- 
2.51.0


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[LTP] [PATCH v2 2/2] tee01, vmsplice01, af_alg08: Use SAFE_SPLICE()

[Andrea Cervesato]

From: Andrea Cervesato <andrea.cervesato@suse.com>

Replace raw splice() calls with SAFE_SPLICE() in tests where splice is
utility plumbing, not the subject of testing.

Signed-off-by: Andrea Cervesato <andrea.cervesato@suse.com>
---
 testcases/kernel/crypto/af_alg08.c              | 1 +
 testcases/kernel/syscalls/tee/tee01.c           | 1 +
 testcases/kernel/syscalls/vmsplice/vmsplice01.c | 1 +
 3 files changed, 3 insertions(+)

diff --git a/testcases/kernel/crypto/af_alg08.c b/testcases/kernel/crypto/af_alg08.c
index 05f17eea4797b7575c97e194e34c0390c6d6be22..5517a7cec31f56c6769d0a5ac37d20477986c3f0 100644
--- a/testcases/kernel/crypto/af_alg08.c
+++ b/testcases/kernel/crypto/af_alg08.c
@@ -27,6 +27,7 @@
 #include "tst_test.h"
 #include "tst_af_alg.h"
 #include "lapi/socket.h"
+#include "lapi/splice.h"
 
 #define TESTFILE "copy_fail"
 #define OVERWRITE_SIZE 4
diff --git a/testcases/kernel/syscalls/tee/tee01.c b/testcases/kernel/syscalls/tee/tee01.c
index 680793eb2b21cfd2609492d3be3bef10abb25acf..24d1b6e4810492e4e4761038fd88505d1df8e49c 100644
--- a/testcases/kernel/syscalls/tee/tee01.c
+++ b/testcases/kernel/syscalls/tee/tee01.c
@@ -14,6 +14,7 @@
 
 #include "tst_test.h"
 #include "lapi/fcntl.h"
+#include "lapi/splice.h"
 #include "lapi/tee.h"
 
 #define TEST_BLOCK_SIZE 1024
diff --git a/testcases/kernel/syscalls/vmsplice/vmsplice01.c b/testcases/kernel/syscalls/vmsplice/vmsplice01.c
index 7b55e66a373d2d72824fbb9146b2af353a5ff1c9..64eed8391797fb01b14c548ebcfe390a403da5ec 100644
--- a/testcases/kernel/syscalls/vmsplice/vmsplice01.c
+++ b/testcases/kernel/syscalls/vmsplice/vmsplice01.c
@@ -15,6 +15,7 @@
 
 #include "tst_test.h"
 #include "lapi/fcntl.h"
+#include "lapi/splice.h"
 #include "lapi/vmsplice.h"
 
 #define TEST_BLOCK_SIZE (1<<17)	/* 128K */

-- 
2.51.0


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Re: [LTP] lib: Add SAFE_SPLICE() macro

[linuxtestproject.agent]

Hi Andrea,

--- [PATCH 1/2] ---

On Mon, 4 May 2026, Andrea Cervesato wrote:
> lib: Add SAFE_SPLICE() macro
>
> Add new SAFE_SPLIT() in lapi/splice.h.

"SAFE_SPLIT()" -> "SAFE_SPLICE()".

> -#include "lapi/splice.h"
> ...
> +	SAFE_SPLICE(file_fd, &off_in, pipefd[1], NULL, OVERWRITE_SIZE, 0);

After this commit, SAFE_SPLICE() is called in af_alg08.c, tee01.c, and
vmsplice01.c but all three no longer include <lapi/splice.h> — the tree
does not compile. The include removal and the SAFE_SPLICE() conversion
must not be split across commits.

This patch also mixes "add library macro" with "convert test files";
split them: patch 1 touches only lapi/splice.h, patch 2 adds the
include and converts the splice() calls in all three test files.

--- [PATCH 2/2] ---

On Mon, 4 May 2026, Andrea Cervesato wrote:
> tee01, vmsplice01, af_alg08: Use SAFE_SPLICE()
>
> Replace raw splice() calls with SAFE_SPLICE() in tests where splice is
> utility plumbing, not the subject of testing.

This patch only adds three "#include lapi/splice.h" lines; the actual
splice()-to-SAFE_SPLICE() conversion is in patch 1/2. Subject and body
must describe what this patch actually does, or better: restructure
the series so the conversion and its include live in the same commit.

---
Note:

Our agent completed the review of the patch.

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comment this email or ignore the suggestions.

Regards,
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