This patch adds punch hole tests to the fsx
stress test. The test is performed through
the fallocate call by randomly choosing to
use the punch hole flag when running the
fallocate test. Regions that have
been punched out should contain zeros, so
the expected file contents buffer is updated
to contain zeros when a hole is punched out.

Signed-off-by: Allison Henderson <redacted>
---
v0 -> v1:
Corrections to the Makefile have been backed out.
This patch needs to be applied on top of
the "xfstests: clean up fallocate configuration tests"
patch

The punch hole tests can be disabled with the
-H flag, and will also be disabled if it is
detected that the filesystem does not support
punch hole


:100644 100644 fe072d3... 8978ef1... M	ltp/fsx.c
 ltp/fsx.c |  111 ++++++++++++++++++++++++++++++++++++++++++++++++++++--------
 1 files changed, 96 insertions(+), 15 deletions(-)

diff --git a/ltp/fsx.c b/ltp/fsx.c
index fe072d3..8978ef1 100644
--- a/ltp/fsx.c
+++ b/ltp/fsx.c

@@ -110,6 +110,7 @@ int	randomoplen = 1;		/* -O flag disables it */
 int	seed = 1;			/* -S flag */
 int     mapped_writes = 1;              /* -W flag disables */
 int     fallocate_calls = 1;            /* -F flag disables */
+int     punch_hole_calls = 1;           /* -H flag disables */
 int 	mapped_reads = 1;		/* -R flag disables it */
 int	fsxgoodfd = 0;
 int	o_direct;			/* -Z */

@@ -207,7 +208,8 @@ logdump(void)
 {
 	int	i, count, down;
 	struct log_entry	*lp;
-	char *falloc_type[3] = {"PAST_EOF", "EXTENDING", "INTERIOR"};
+	char *falloc_type[4] = {"PAST_EOF", "EXTENDING", "INTERIOR",
+				"PUNCH_HOLE"};
 
 	prt("LOG DUMP (%d total operations):\n", logcount);
 	if (logcount < LOGSIZE) {

@@ -791,6 +793,11 @@ dofallocate(unsigned offset, unsigned length)
 {
 	unsigned end_offset;
 	int keep_size;
+	int max_offset = 0;
+	int max_len = 0;
+	int mode = 0;
+	char *op_name;
+	int punch_hole = 0;
 
         if (length == 0) {
                 if (!quiet && testcalls > simulatedopcount)

@@ -799,11 +806,37 @@ dofallocate(unsigned offset, unsigned length)
                 return;
         }
 
+#ifdef FALLOC_FL_PUNCH_HOLE
+	if (fallocate_calls && !punch_hole_calls)
+		punch_hole = 0;
+	else if (!fallocate_calls && punch_hole_calls)
+		punch_hole = 1;
+	else
+		punch_hole = random() % 2;
+
+	/* Keep size must be set for punch hole */
+	if (punch_hole) {
+		keep_size = 1;
+		mode = FALLOC_FL_PUNCH_HOLE;
+	} else
+		keep_size = random() % 2;
+#else
 	keep_size = random() % 2;
+#endif

@@ -1426,8 +1489,26 @@ main(int argc, char **argv)
 		if (fallocate(fd, 0, 0, 1) && errno == EOPNOTSUPP) {
 			warn("main: filesystem does not support fallocate, disabling");
 			fallocate_calls = 0;
-		} else
+			/*
+			 * punch hole depends on fallocate,
+			 * so turn punch hole off too
+			 */
+			punch_hole_calls = 0;
+		} else {
+#ifdef FALLOC_FL_PUNCH_HOLE
+			if (fallocate(fd,
+				FALLOC_FL_KEEP_SIZE | FALLOC_FL_PUNCH_HOLE,
+				0, 1) && errno == EOPNOTSUPP) {
+				warn("main: filesystem does not support"
+					" fallocate punch hole, disabling");
+				punch_hole_calls = 0;
+			}
+#else
+			punch_hole_calls = 0;
+#endif
+
 			ftruncate(fd, 0);
+		}
 	}
 #else /* ! FALLOCATE */
 	fallocate_calls = 0;