[LTP] [PATCH v2] fallocate04: another check if SEEK_HOLE is not supported

[Zeng Linggang <zenglg.jy@cn.fujitsu.com>]

SEEK_HOLE is only supported since version 3.1. Check the specified
range blocks are zeroed while the kernel does not supported SEEK_HOLE.

Signed-off-by: Zhang Jin <jy_zhangjin@cn.fujitsu.com>
---
 testcases/kernel/syscalls/fallocate/fallocate04.c | 13 ++++++++++---
 1 file changed, 10 insertions(+), 3 deletions(-)

diff --git a/testcases/kernel/syscalls/fallocate/fallocate04.c b/testcases/kernel/syscalls/fallocate/fallocate04.c
index 911bbe8..e94c572 100644
--- a/testcases/kernel/syscalls/fallocate/fallocate04.c
+++ b/testcases/kernel/syscalls/fallocate/fallocate04.c
@@ -98,13 +98,13 @@ static void setup(void)
 	get_blocksize();
 }
 
-static void check_file_data(const char exp_buf[], size_t size)
+static void check_file_data_(const char exp_buf[], size_t size, off_t offset)
 {
 	char rbuf[size];
 
 	tst_resm(TINFO, "reading the file, compare with expected buffer");
 
-	SAFE_LSEEK(cleanup, fd, 0, SEEK_SET);
+	SAFE_LSEEK(cleanup, fd, offset, SEEK_SET);
 	SAFE_READ(cleanup, 1, fd, rbuf, size);
 
 	if (memcmp(exp_buf, rbuf, size)) {
@@ -116,6 +116,11 @@ static void check_file_data(const char exp_buf[], size_t size)
 	}
 }
 
+static inline void check_file_data(const char exp_buf[], size_t size)
+{
+	check_file_data_(exp_buf, size, 0);
+}
+
 static void test01(void)
 {
 	tst_resm(TINFO, "allocate '%zu' bytes", buf_size);
@@ -158,7 +163,9 @@ static void test02(void)
 			tst_brkm(TFAIL | TERRNO, cleanup,
 				 "fallocate() or lseek() failed");
 		}
-		tst_resm(TWARN | TERRNO, "lseek() doesn't support SEEK_HOLE");
+		char zeros[block_size];
+		memset(zeros, 0, block_size);
+		check_file_data_(zeros, block_size, block_size);
 	}
 	tst_resm(TINFO, "found a hole at '%ld' offset", ret);
 
-- 
1.9.3




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