Date:	Fri, 03 Jun 2011 12:13:44 -0700
From:	Allison Henderson <achender@...ux.vnet.ibm.com>
To:	linux-fsdevel <linux-fsdevel@...r.kernel.org>,
	Ext4 Developers List <linux-ext4@...r.kernel.org>,
	xfs-oss <xfs@....sgi.com>
Subject: Fwd: [XFSTEST Add Fallocate Punch Hole Tests 1/3 v4] Add Punch Hole
 to FSX

Hi All,

I realized today that this patch needed to go out on some more mailing lists,
so I'm going to forward them along.  This is the patch set I've been 
working on to add more punch hole tests to xfstests.  I'll keep the xfs 
mailing list on the forward too, to help keep the discussions in one thread. Thx!

Allison Henderson
 
-------- Original Message --------
Subject: [XFSTEST Add Fallocate Punch Hole Tests 1/3 v4] Add Punch Hole to FSX
Date: Wed, 25 May 2011 19:34:28 -0700
From: Allison Henderson <achender@...ux.vnet.ibm.com>
To: xfs-oss <xfs@....sgi.com>

This patch adds punch hole tests to the fsx stress test. 

Signed-off-by: Allison Henderson <achender@...ibm.com>

v1 -> v2:
Corrections to the Makefile have been backed out.
Those corrections have been addressed in 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

v2 -> v4
Punch hole tests and functionality tests have been moved
into their own functions.  Existing dofallocate routine
has been renamed to do_preallocate.
---
:100644 100755 fe072d3... a55b6f7... M	ltp/fsx.c
 ltp/fsx.c |  140 +++++++++++++++++++++++++++++++++++++++++++++++++++++--------
 1 files changed, 122 insertions(+), 18 deletions(-)

diff --git a/ltp/fsx.c b/ltp/fsx.c
old mode 100644
new mode 100755
index fe072d3..a55b6f7
--- a/ltp/fsx.c
+++ b/ltp/fsx.c
@@ -69,6 +69,7 @@ int			logcount = 0;	/* total ops */
 #define OP_MAPWRITE	6
 #define OP_SKIPPED	7
 #define OP_FALLOCATE	8
+#define OP_PUNCH_HOLE	9

 #undef PAGE_SIZE
 #define PAGE_SIZE       getpagesize()
@@ -110,6 +111,7 @@ 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 */
@@ -279,6 +281,14 @@ logdump(void)
 			    badoff < lp->args[0] + lp->args[1])
 				prt("\t******FFFF");
 			break;
+		case OP_PUNCH_HOLE:
+			prt("PUNCH HOLE\t0x%x thru 0x%x\t(0x%x bytes)",
+			    lp->args[0], lp->args[0] + lp->args[1] - 1,
+			    lp->args[1]);
+			if (badoff >= lp->args[0] && badoff <
+						     lp->args[0] + lp->args[1])
+				prt("\t******PPPP");
+			break;
 		case OP_SKIPPED:
 			prt("SKIPPED (no operation)");
 			break;
@@ -784,10 +794,67 @@ dotruncate(unsigned size)
 	}
 }

+#ifdef FALLOC_FL_PUNCH_HOLE
+void
+do_punch_hole(unsigned offset, unsigned length)
+{
+	unsigned end_offset;
+	int max_offset = 0;
+	int max_len = 0;
+	int mode = FALLOC_FL_PUNCH_HOLE | FALLOC_FL_KEEP_SIZE;
+
+	if (length == 0) {
+		if (!quiet && testcalls > simulatedopcount)
+			prt("skipping zero length punch hole\n");
+			log4(OP_SKIPPED, OP_PUNCH_HOLE, offset, length);
+		return;
+	}
+
+	if (file_size <= (loff_t)offset) {
+		if (!quiet && testcalls > simulatedopcount)
+			prt("skipping hole punch off the end of the file\n");
+			log4(OP_SKIPPED, OP_PUNCH_HOLE, offset, length);
+		return;
+	}
+
+	end_offset = offset + length;
+
+	log4(OP_PUNCH_HOLE, offset, length, 0);
+
+	if (testcalls <= simulatedopcount)
+		return;
+
+	if ((progressinterval && testcalls % progressinterval == 0) ||
+	    (debug && (monitorstart == -1 || monitorend == -1 ||
+		      end_offset <= monitorend))) {
+		prt("%lu punch\tfrom 0x%x to 0x%x, (0x%x bytes)\n", testcalls,
+			offset, offset+length, length);
+	}
+	if (fallocate(fd, mode, (loff_t)offset, (loff_t)length) == -1) {
+		prt("%punch hole: %x to %x\n", offset, length);
+		prterr("do_punch_hole: fallocate");
+		report_failure(161);
+	}
+
+
+	max_offset = offset < file_size ? offset : file_size;
+	max_len = max_offset + length <= file_size ? length :
+			file_size - max_offset;
+	memset(good_buf + max_offset, '\0', max_len);
+}
+
+#else
+void
+do_punch_hole(unsigned offset, unsigned length)
+{
+	return;
+}
+#endif
+
 #ifdef FALLOCATE
 /* fallocate is basically a no-op unless extending, then a lot like a truncate */
 void
-dofallocate(unsigned offset, unsigned length)
+do_preallocate(unsigned offset, unsigned length)
 {
 	unsigned end_offset;
 	int keep_size;
@@ -831,13 +898,13 @@ dofallocate(unsigned offset, unsigned length)
 		prt("%lu falloc\tfrom 0x%x to 0x%x\n", testcalls, offset, length);
 	if (fallocate(fd, keep_size ? FALLOC_FL_KEEP_SIZE : 0, (loff_t)offset, (loff_t)length) == -1) {
 	        prt("fallocate: %x to %x\n", offset, length);
-		prterr("dofallocate: fallocate");
+		prterr("do_preallocate: fallocate");
 		report_failure(161);
 	}
 }
 #else
 void
-dofallocate(unsigned offset, unsigned length)
+do_preallocate(unsigned offset, unsigned length)
 {
 	return;
 }
@@ -895,8 +962,7 @@ test(void)
 	unsigned long	offset;
 	unsigned long	size = maxoplen;
 	unsigned long	rv = random();
-	unsigned long	op = rv % (3 + !lite + mapped_writes + fallocate_calls);
-
+	unsigned long	op = rv % (3 + !lite + mapped_writes + fallocate_calls + punch_hole_calls);
         /* turn off the map read if necessary */

         if (op == 2 && !mapped_reads)
@@ -924,6 +990,7 @@ test(void)
 	 * TRUNCATE:	op = -     3
 	 * MAPWRITE:    op = 3     4
 	 * FALLOCATE:   op = -     5
+	 * PUNCH HOLE:  op = -     6
 	 */
 	if (lite ? 0 : op == 3 && (style & 1) == 0) /* vanilla truncate? */
 		dotruncate(random() % maxfilelen);
@@ -941,7 +1008,12 @@ test(void)
 				offset %= maxfilelen;
 				if (offset + size > maxfilelen)
 					size = maxfilelen - offset;
-				dofallocate(offset, size);
+				do_preallocate(offset, size);
+			} else if (op == 6) {
+				offset %= maxfilelen;
+				if (offset + size > maxfilelen)
+					size = maxfilelen - offset;
+				do_punch_hole(offset, size);
 			} else if (op == 1 || op == (lite ? 3 : 4)) {
 				/* write / mapwrite */
 				offset %= maxfilelen;
@@ -1013,6 +1085,9 @@ usage(void)
 #ifdef FALLOCATE
 "	-F: Do not use fallocate (preallocation) calls\n"
 #endif
+#ifdef FALLOC_FL_PUNCH_HOLE
+"       -H: Do not use punch hole calls\n"
+#endif
 "	-L: fsxLite - no file creations & no file size changes\n\
 	-N numops: total # operations to do (default infinity)\n\
 	-O: use oplen (see -o flag) for every op (default random)\n\
@@ -1161,6 +1236,41 @@ int aio_rw(int rw, int fd, char *buf, unsigned len, unsigned offset)

 #endif

+void
+test_fallocate()
+{
+#ifdef FALLOCATE
+	if (!lite && fallocate_calls) {
+		if (fallocate(fd, 0, 0, 1) && errno == EOPNOTSUPP) {
+			warn("main: filesystem does not support fallocate, disabling");
+			fallocate_calls = 0;
+		} else {
+			ftruncate(fd, 0);
+		}
+	}
+#else /* ! FALLOCATE */
+	fallocate_calls = 0;
+#endif
+}
+
+void
+test_punch_hole()
+{
+#ifdef FALLOC_FL_PUNCH_HOLE
+	if (!lite && punch_hole_calls) {
+		if (fallocate(fd, 0, 0,
+			FALLOC_FL_KEEP_SIZE | FALLOC_FL_PUNCH_HOLE) &&
+			errno == EOPNOTSUPP) {
+
+			warn("main: filesystem does not support fallocate punch hole, disabling");
+			punch_hole_calls = 0;
+		}
+	}
+#else /* ! PUNCH HOLE */
+	punch_hole_calls = 0;
+#endif
+}
+
 int
 main(int argc, char **argv)
 {
@@ -1179,7 +1289,7 @@ main(int argc, char **argv)

 	setvbuf(stdout, (char *)0, _IOLBF, 0); /* line buffered stdout */

-	while ((ch = getopt(argc, argv, "b:c:dfl:m:no:p:qr:s:t:w:xyAD:FLN:OP:RS:WZ"))
+	while ((ch = getopt(argc, argv, "b:c:dfl:m:no:p:qr:s:t:w:xyAD:FHLN:OP:RS:WZ"))
 	       != EOF)
 		switch (ch) {
 		case 'b':
@@ -1276,6 +1386,9 @@ main(int argc, char **argv)
 		case 'F':
 			fallocate_calls = 0;
 			break;
+		case 'H':
+			punch_hole_calls = 0;
+			break;
 		case 'L':
 		        lite = 1;
 			break;
@@ -1421,17 +1534,8 @@ main(int argc, char **argv)
 	} else 
 		check_trunc_hack();

-#ifdef FALLOCATE
-	if (!lite && fallocate_calls) {
-		if (fallocate(fd, 0, 0, 1) && errno == EOPNOTSUPP) {
-			warn("main: filesystem does not support fallocate, disabling");
-			fallocate_calls = 0;
-		} else
-			ftruncate(fd, 0);
-	}
-#else /* ! FALLOCATE */
-	fallocate_calls = 0;
-#endif
+	test_fallocate();
+	test_punch_hole();

 	while (numops == -1 || numops--)
 		test();
-- 
1.7.1

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