Test for detecting unwritten extent related corruption reading+writing under swap.

084

@@ -0,0 +1,81 @@
+#! /bin/sh
+# XFS QA Test No. 084
+#
+# Exercises unwritten extent reads and writes, looking
+# for data corruption (zeroes read) near the end of file.
+#
+#-----------------------------------------------------------------------
+# Copyright (c) 2000-2004 Silicon Graphics, Inc.  All Rights Reserved.
+# 
+# This program is free software; you can redistribute it and/or modify it
+# under the terms of version 2 of the GNU General Public License as
+# published by the Free Software Foundation.
+# 
+# This program is distributed in the hope that it would be useful, but
+# WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+# 
+# Further, this software is distributed without any warranty that it is
+# free of the rightful claim of any third person regarding infringement
+# or the like.  Any license provided herein, whether implied or
+# otherwise, applies only to this software file.  Patent licenses, if
+# any, provided herein do not apply to combinations of this program with
+# other software, or any other product whatsoever.
+# 
+# You should have received a copy of the GNU General Public License along
+# with this program; if not, write the Free Software Foundation, Inc., 59
+# Temple Place - Suite 330, Boston MA 02111-1307, USA.
+# 
+# Contact information: Silicon Graphics, Inc., 1600 Amphitheatre Pkwy,
+# Mountain View, CA  94043, or:
+# 
+# http://www.sgi.com 
+# 
+# For further information regarding this notice, see: 
+# 
+# http://oss.sgi.com/projects/GenInfo/SGIGPLNoticeExplan/
+#-----------------------------------------------------------------------
+#
+# creator
+owner=nathans@sgi.com
+
+seq=`basename $0`
+echo "QA output created by $seq"
+
+here=`pwd`
+tmp=/tmp/$$
+status=1	# failure is the default!
+trap "rm -f $tmp.*; exit \$status" 0 1 2 3 15
+
+# get standard environment, filters and checks
+. ./common.rc
+. ./common.filter
+
+_filter_resv()
+{
+	sed -e "s,$TEST_DIR/resv,[TESTFILE],g"
+}
+
+pgsize=`$here/src/feature -p`
+
+# -i == number of iterations
+# -l == bytes to leak on each iteration
+# -b == read/write block size
+# -s == preallocation size
+
+# real QA test starts here
+echo
+echo "*** First case - I/O blocksize same as pagesize"
+$here/src/resvtest -i 20 -b $pgsize "$TEST_DIR/resv" | _filter_resv
+[ $? -eq 0 ] && echo done
+rm -f "$TEST_DIR/mumble"
+
+echo
+echo "*** Second case - 512 byte I/O blocksize"
+$here/src/resvtest -i 40 -b 512 "$TEST_DIR/resv" | _filter_resv
+[ $? -eq 0 ] && echo done
+rm -f "$TEST_DIR/grumble"
+
+# success, all done
+status=0
+exit

084.out

@@ -0,0 +1,9 @@
+QA output created by 084
+
+*** First case - I/O blocksize same as pagesize
+reserved 40960000 bytes for [TESTFILE] using XFS_IOC_RESVSP64
+done
+
+*** Second case - 512 byte I/O blocksize
+reserved 40960000 bytes for [TESTFILE] using XFS_IOC_RESVSP64
+done

group

@@ -144,3 +144,4 @@ ioctl		nathans@sgi.com
 081 logprint quota
 082 logprint
 083 rw auto
+084 ioctl rw auto

src/Makefile

@@ -1,5 +1,5 @@
 # 
-# Copyright (c) 2000-2003 Silicon Graphics, Inc.  All Rights Reserved.
+# Copyright (c) 2000-2004 Silicon Graphics, Inc.  All Rights Reserved.
 # 
 # This program is free software; you can redistribute it and/or modify it
 # under the terms of version 2 of the GNU General Public License as
@@ -36,8 +36,8 @@ include $(TOPDIR)/include/builddefs
 TARGETS = alloc acl_get bstat devzero dirstress fault feature \
 	  fill fill2 getpagesize holes xfsctl loggen lstat64 \
 	  nametest permname randholes runas truncfile usemem \
-	  fstest mmapcat append_reader append_writer \
+	  fileread fstest mmapcat append_reader append_writer \
-	  dirperf metaperf enospc_unlink
+	  dirperf metaperf enospc_unlink resvtest scaleread
 ifeq ($(ENABLE_DBM), yes)
 TARGETS += dbtest
 endif
@@ -77,5 +77,11 @@ loggen:	loggen.o
 fstest:	fstest.o
 	$(LINKTEST)
 
+#scaleread: scaleread.o $(LDLIBS)
+#	$(LINKTEST)
+
+resvtest: resvtest.o
+	$(LINKTEST)
+
 acl_get: acl_get.o $(LIBACL) $(LIBATTR)
 	$(LINKTEST) $(LIBACL) $(LIBATTR) $(LDLIBS)

src/resvtest.c

@@ -0,0 +1,165 @@
+/*
+ * Copyright (c) 2004 Silicon Graphics, Inc.  All Rights Reserved.
+ * 
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of version 2 of the GNU General Public License as
+ * published by the Free Software Foundation.
+ * 
+ * This program is distributed in the hope that it would be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+ * 
+ * Further, this software is distributed without any warranty that it is
+ * free of the rightful claim of any third person regarding infringement
+ * or the like.  Any license provided herein, whether implied or
+ * otherwise, applies only to this software file.  Patent licenses, if
+ * any, provided herein do not apply to combinations of this program with
+ * other software, or any other product whatsoever.
+ * 
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write the Free Software Foundation, Inc., 59
+ * Temple Place - Suite 330, Boston MA 02111-1307, USA.
+ * 
+ * Contact information: Silicon Graphics, Inc., 1600 Amphitheatre Pkwy,
+ * Mountain View, CA  94043, or:
+ * 
+ * http://www.sgi.com 
+ * 
+ * For further information regarding this notice, see: 
+ * 
+ * http://oss.sgi.com/projects/GenInfo/SGIGPLNoticeExplan/
+ */
+ 
+#include "global.h"
+
+int
+main(int argc, char **argv)
+{
+	int		c, i, j, n, err = 0;
+	int		writefd, readfd;
+	long		iterations = 100;
+	long		psize, bsize, leaksize = 32 * 1024 * 1024;
+	char		*filename;
+	char		*readbuffer, *writebuffer;
+	off64_t		resvsize;
+	xfs_flock64_t	resvsp;
+
+	psize = bsize = getpagesize();
+	resvsize = bsize * (off64_t) 10000;
+
+	while ((c = getopt(argc, argv, "b:i:l:s:")) != EOF) {
+		switch(c) {
+		case 'b':
+			bsize = atol(optarg);
+			break;
+		case 'i':
+			iterations = atol(optarg);
+			break;
+		case 'l':
+			leaksize = atol(optarg);
+			break;
+		case 's':
+			resvsize = (off64_t) atoll(optarg);
+			break;
+		default:
+			err++;
+			break;
+		}
+	}
+
+	if (optind > argc + 1)
+		err++;
+
+	if (err) {
+		printf("Usage: %s [-b blksize] [-l leaksize] [-r resvsize]\n",
+			argv[0]);
+		exit(0);
+	}
+
+	filename = argv[optind];
+
+	readbuffer = memalign(psize, bsize);
+	writebuffer = memalign(psize, bsize);
+	if (!readbuffer || !writebuffer) {
+		perror("open");
+		exit(1);
+	}
+	memset(writebuffer, 'A', sizeof(writebuffer));
+
+	unlink(filename);
+	writefd = open(filename, O_RDWR | O_CREAT | O_EXCL, S_IRUSR | S_IWUSR);
+	if (writefd < 0) {
+		perror("open");
+		exit(1);
+	}
+	readfd = open(filename, O_RDONLY);
+	if (readfd < 0) {
+		perror("open");
+		exit(1);
+	}
+
+	/* preallocate file space */
+	resvsp.l_whence = 0;
+	resvsp.l_start = 0;
+	resvsp.l_len = resvsize;
+	if (ioctl(writefd, XFS_IOC_RESVSP64, &resvsp) < 0) {
+		fprintf(stdout, "attempt to reserve %lld bytes for %s "
+		                "using %s failed: %s (%d)\n", 
+				resvsize, filename, "XFS_IOC_RESVSP64",
+				strerror(errno), errno);
+	} else {
+		fprintf(stdout, "reserved %lld bytes for %s using %s\n",
+				resvsize, filename, "XFS_IOC_RESVSP64");
+	}
+
+	/* Space is now preallocated, start IO --
+	 * write at current offset, pressurize, seek to zero on reader
+	 * and read up to current write offset.
+	 */
+
+	n = 0;
+	while (++n < iterations) {
+		char *p;
+		int numerrors;
+
+		if (write(writefd, writebuffer, sizeof(writebuffer)) < 0) {
+			perror("write");
+			exit(1);
+		}
+
+		/* Apply some memory pressure 
+		 * (allocate another chunk and touch all pages)
+		 */
+		for (i = 0; i < (leaksize / psize); i++) {
+			p = malloc(psize);
+			if (p)
+				p[7] = '7';
+		}
+		sleep(1);
+		lseek(readfd, SEEK_SET, 0);
+		numerrors = 0;
+		for (j = 0; j < n; j++) {
+			if (read(readfd, readbuffer, sizeof(readbuffer)) < 0) {
+				perror("read");
+				exit(1);
+			}
+			for (i = 0; i < sizeof(readbuffer); i++) {
+				if (readbuffer[i] != 'A') {
+					fprintf(stderr,
+"errors detected in file, pos: %d (%lld+%d), nwrites: %d [val=0x%x].\n",
+						j, (long long)j * 4096,
+						i, n, readbuffer[i]);
+					numerrors++;
+					break;
+				}
+			}
+		}
+		if (numerrors > 10) {
+			exit(1);
+		} else if (numerrors) {
+			fprintf(stdout, "\n");
+		}
+	}
+
+	return(0);
+}