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_zhang...@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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