[PATCH] fs: fsstress: make test more POSIX compliant

in commit bacc849720ec4efda5a0a8a9ea6a0e93a1415541, malloc.h was removed
and stdlib.h got used instead. However, it's not enough. The function
memalign() is also obsolete (via man memalign) and we should use
posix_memalign instead. Also if we keep memalign() function here, the
program would probably hit segfault once it enters dwrite_t and dread_t.

Besides the POSIX compliant fix, I also did a small fix to remove
compling warnings.

I tried to update this program output to tst_resm/tst_brkm style but
failed, I got confused by some printf output.

Signed-off-by: Caspar Zhang <czhang@redhat.com>
---
 testcases/kernel/fs/fsstress/fsstress.c |   38
++++++++++++++++++------------
 1 files changed, 23 insertions(+), 15 deletions(-)

diff --git a/testcases/kernel/fs/fsstress/fsstress.c
b/testcases/kernel/fs/fsstress/fsstress.c
index e3b48ea..0e5fba2 100644
--- a/testcases/kernel/fs/fsstress/fsstress.c
+++ b/testcases/kernel/fs/fsstress/fsstress.c
@@ -1746,7 +1746,7 @@ void
 dread_f(int opno, long r)
 {
 	__int64_t	align;
-	char		*buf;
+	char		*buf=NULL;
 	struct dioattr	diob;
 	int		e;
 	pathname_t	f;
@@ -1799,11 +1799,9 @@ dread_f(int opno, long r)
 		return;
 	}

-	if (no_xfs) {
-		diob.d_miniosz = stb.st_blksize;
-		diob.d_maxiosz = stb.st_blksize * 256;  /* good number ? */
-		diob.d_mem = stb.st_blksize;
-	}
+	diob.d_miniosz = stb.st_blksize;
+	diob.d_maxiosz = stb.st_blksize * 256;  /* good number ? */
+	diob.d_mem = stb.st_blksize;
 #ifndef NO_XFS
 	else if (ioctl(fd, XFS_IOC_DIOINFO, &diob) < 0) {
 		if (v)
@@ -1826,7 +1824,13 @@ dread_f(int opno, long r)
 		len = align;
 	else if (len > diob.d_maxiosz)
 		len = diob.d_maxiosz;
-	buf = memalign(diob.d_mem, len);
+	if (posix_memalign((void **)buf, diob.d_mem, len) != 0) {
+		perror("posix_memalign");
+		exit (1);
+	} else if (buf == NULL) {
+		fprintf(stderr, "buf remains NULL unexpectly\n");
+		exit (1);
+	}
 	e = read(fd, buf, len) < 0 ? errno : 0;
 	free(buf);
 	if (v)
@@ -1840,7 +1844,7 @@ void
 dwrite_f(int opno, long r)
 {
 	__int64_t	align;
-	char		*buf;
+	char		*buf=NULL;
 	struct dioattr	diob;
 	int		e;
 	pathname_t	f;
@@ -1882,11 +1886,9 @@ dwrite_f(int opno, long r)
 		close(fd);
 		return;
 	}
-	if (no_xfs) {
-		diob.d_miniosz = stb.st_blksize;
-		diob.d_maxiosz = stb.st_blksize * 256;  /* good number ? */
-		diob.d_mem = stb.st_blksize;
-	}
+	diob.d_miniosz = stb.st_blksize;
+	diob.d_maxiosz = stb.st_blksize * 256;  /* good number ? */
+	diob.d_mem = stb.st_blksize;
 #ifndef NO_XFS
 	else if (ioctl(fd, XFS_IOC_DIOINFO, &diob) < 0) {
 		if (v)
@@ -1909,7 +1911,13 @@ dwrite_f(int opno, long r)
 		len = align;
 	else if (len > diob.d_maxiosz)
 		len = diob.d_maxiosz;
-	buf = memalign(diob.d_mem, len);
+	if (posix_memalign((void **)buf, diob.d_mem, len) != 0) {
+		perror("posix_memalign");
+		exit (1);
+	} else if (buf == NULL)	{
+		fprintf(stderr, "buf remains NULL unexpectly\n");
+		exit (1);
+	}
 	off %= maxfsize;
 	lseek64(fd, off, SEEK_SET);
 	memset(buf, nameseq & 0xff, len);
@@ -2650,4 +2658,4 @@ write_f(int opno, long r)
 			procid, opno, f.path, (long long)off, (long int)len, e);
 	free_pathname(&f);
 	close(fd);
-}
\ No newline at end of file
+}
-- 
1.7.4.1


-- 
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Red Hat Software (Beijing) Co., R&D Branch
http://www.cn.redhat.com/
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