openwrt/tools/genext2fs/patches/300-blocksize-creator.patch

Index: genext2fs/genext2fs.c
===================================================================
--- genext2fs.orig/genext2fs.c	2011-09-03 14:21:17.000000000 +0200
+++ genext2fs/genext2fs.c	2011-09-03 14:21:17.000000000 +0200
@@ -151,13 +151,24 @@
 
 // block size
 
-#define BLOCKSIZE         1024
+static int blocksize = 1024;
+
+#define BLOCKSIZE         blocksize
 #define BLOCKS_PER_GROUP  8192
 #define INODES_PER_GROUP  8192
 /* Percentage of blocks that are reserved.*/
 #define RESERVED_BLOCKS       5/100
 #define MAX_RESERVED_BLOCKS  25/100
 
+/* The default value for s_creator_os. */
+#if defined(__GNU__)
+# define CREATOR_OS  1 /* Hurd */
+#elif defined(__FreeBSD__)
+# define CREATOR_OS  3 /* FreeBSD */
+#else
+# define CREATOR_OS  0 /* Linux */
+#endif
+
 
 // inode block size (why is it != BLOCKSIZE ?!?)
 /* The field i_blocks in the ext2 inode stores the number of data blocks
@@ -239,10 +250,10 @@
 	  (fs)->sb.s_blocks_per_group - 1) / (fs)->sb.s_blocks_per_group)
 
 // Get group block bitmap (bbm) given the group number
-#define GRP_GET_GROUP_BBM(fs,grp) ( get_blk((fs),(fs)->gd[(grp)].bg_block_bitmap) )
+#define GRP_GET_GROUP_BBM(fs,grp) ( get_blk((fs), get_gd((fs),(grp))->bg_block_bitmap) )
 
 // Get group inode bitmap (ibm) given the group number
-#define GRP_GET_GROUP_IBM(fs,grp) ( get_blk((fs),(fs)->gd[(grp)].bg_inode_bitmap) )
+#define GRP_GET_GROUP_IBM(fs,grp) ( get_blk((fs), get_gd((fs),(grp))->bg_inode_bitmap) )
 		
 // Given an inode number find the group it belongs to
 #define GRP_GROUP_OF_INODE(fs,nod) ( ((nod)-1) / (fs)->sb.s_inodes_per_group)
@@ -532,7 +543,7 @@
 	char d_name[0];
 } directory;
 
-typedef uint8 block[BLOCKSIZE];
+typedef uint8 *block;
 
 /* blockwalker fields:
    The blockwalker is used to access all the blocks of a file (including
@@ -571,16 +582,12 @@
 
 
 /* Filesystem structure that support groups */
-#if BLOCKSIZE == 1024
 typedef struct
 {
-	block zero;            // The famous block 0
-	superblock sb;         // The superblock
-	groupdescriptor gd[0]; // The group descriptors
+	uint8 zero[1024];      // Room for bootloader stuff
+	superblock sb;         // The superblock, always at 1024
+	// group descriptors come next, see get_gd() below
 } filesystem;
-#else
-#error UNHANDLED BLOCKSIZE
-#endif
 
 // now the endianness swap
 
@@ -820,6 +827,14 @@
 	return (uint8*)fs + blk*BLOCKSIZE;
 }
 
+// the group descriptors are aligned on the block size
+static inline groupdescriptor *
+get_gd(filesystem *fs, int no)
+{
+	int gdblk = (sizeof (filesystem) + BLOCKSIZE - 1) / BLOCKSIZE;
+	return ((groupdescriptor *) get_blk(fs, gdblk)) + no;
+}
+
 // return a given inode from a filesystem
 static inline inode *
 get_nod(filesystem *fs, uint32 nod)
@@ -829,7 +844,7 @@
 
 	offset = GRP_IBM_OFFSET(fs,nod);
 	grp = GRP_GROUP_OF_INODE(fs,nod);
-	itab = (inode *)get_blk(fs, fs->gd[grp].bg_inode_table);
+	itab = (inode *)get_blk(fs, get_gd(fs,grp)->bg_inode_table);
 	return itab+offset-1;
 }
 
@@ -875,18 +890,18 @@
 
 	grp = GRP_GROUP_OF_INODE(fs,nod);
 	nbgroups = GRP_NBGROUPS(fs);
-	if(!(bk = allocate(get_blk(fs,fs->gd[grp].bg_block_bitmap), 0))) {
+	if(!(bk = allocate(GRP_GET_GROUP_BBM(fs, grp), 0))) {
 		for(grp=0;grp<nbgroups && !bk;grp++)
-			bk=allocate(get_blk(fs,fs->gd[grp].bg_block_bitmap),0);
+			bk = allocate(GRP_GET_GROUP_BBM(fs, grp), 0);
 		grp--;
 	}
 	if (!bk)
 		error_msg_and_die("couldn't allocate a block (no free space)");
-	if(!(fs->gd[grp].bg_free_blocks_count--))
+	if(!(get_gd(fs, grp)->bg_free_blocks_count--))
 		error_msg_and_die("group descr %d. free blocks count == 0 (corrupted fs?)",grp);
 	if(!(fs->sb.s_free_blocks_count--))
 		error_msg_and_die("superblock free blocks count == 0 (corrupted fs?)");
-	return fs->sb.s_blocks_per_group*grp + bk;
+	return fs->sb.s_first_data_block + fs->sb.s_blocks_per_group*grp + (bk-1);
 }
 
 // free a block
@@ -897,8 +912,8 @@
 
 	grp = bk / fs->sb.s_blocks_per_group;
 	bk %= fs->sb.s_blocks_per_group;
-	deallocate(get_blk(fs,fs->gd[grp].bg_block_bitmap), bk);
-	fs->gd[grp].bg_free_blocks_count++;
+	deallocate(GRP_GET_GROUP_BBM(fs, grp), bk);
+	get_gd(fs, grp)->bg_free_blocks_count++;
 	fs->sb.s_free_blocks_count++;
 }
 
@@ -918,16 +933,16 @@
 	/* We do it for all inodes.                                           */
 	avefreei  =  fs->sb.s_free_inodes_count / nbgroups;
 	for(grp=0; grp<nbgroups; grp++) {
-		if (fs->gd[grp].bg_free_inodes_count < avefreei ||
-		    fs->gd[grp].bg_free_inodes_count == 0)
+		if (get_gd(fs, grp)->bg_free_inodes_count < avefreei ||
+		    get_gd(fs, grp)->bg_free_inodes_count == 0)
 			continue;
 		if (!best_group || 
-			fs->gd[grp].bg_free_blocks_count > fs->gd[best_group].bg_free_blocks_count)
+			get_gd(fs, grp)->bg_free_blocks_count > get_gd(fs, best_group)->bg_free_blocks_count)
 			best_group = grp;
 	}
-	if (!(nod = allocate(get_blk(fs,fs->gd[best_group].bg_inode_bitmap),0)))
+	if (!(nod = allocate(GRP_GET_GROUP_IBM(fs, best_group), 0)))
 		error_msg_and_die("couldn't allocate an inode (no free inode)");
-	if(!(fs->gd[best_group].bg_free_inodes_count--))
+	if(!(get_gd(fs, best_group)->bg_free_inodes_count--))
 		error_msg_and_die("group descr. free blocks count == 0 (corrupted fs?)");
 	if(!(fs->sb.s_free_inodes_count--))
 		error_msg_and_die("superblock free blocks count == 0 (corrupted fs?)");
@@ -1390,7 +1405,7 @@
 			case FM_IFDIR:
 				add2dir(fs, nod, nod, ".");
 				add2dir(fs, nod, parent_nod, "..");
-				fs->gd[GRP_GROUP_OF_INODE(fs,nod)].bg_used_dirs_count++;
+				get_gd(fs, GRP_GROUP_OF_INODE(fs,nod))->bg_used_dirs_count++;
 				break;
 		}
 	}
@@ -1860,7 +1875,7 @@
 		swap_nod(nod);
 	}
 	for(i=0;i<GRP_NBGROUPS(fs);i++)
-		swap_gd(&(fs->gd[i]));
+		swap_gd(get_gd(fs, i));
 	swap_sb(&fs->sb);
 }
 
@@ -1870,7 +1885,7 @@
 	uint32 i;
 	swap_sb(&fs->sb);
 	for(i=0;i<GRP_NBGROUPS(fs);i++)
-		swap_gd(&(fs->gd[i]));
+		swap_gd(get_gd(fs, i));
 	for(i = 1; i < fs->sb.s_inodes_count; i++)
 	{
 		inode *nod = get_nod(fs, i);
@@ -1895,7 +1910,8 @@
 
 // initialize an empty filesystem
 static filesystem *
-init_fs(int nbblocks, int nbinodes, int nbresrvd, int holes, uint32 fs_timestamp)
+init_fs(int nbblocks, int nbinodes, int nbresrvd, int holes,
+		uint32 fs_timestamp, uint32 creator_os)
 {
 	uint32 i;
 	filesystem *fs;
@@ -1921,10 +1937,14 @@
 	 */
 	min_nbgroups = (nbinodes + INODES_PER_GROUP - 1) / INODES_PER_GROUP;
 
+	/* On filesystems with 1k block size, the bootloader area uses a full
+	 * block. For 2048 and up, the superblock can be fitted into block 0.
+	 */
+	first_block = (BLOCKSIZE == 1024);
+
 	/* nbblocks is the total number of blocks in the filesystem.
 	 * a block group can have no more than 8192 blocks.
 	 */
-	first_block = (BLOCKSIZE == 1024);
 	nbgroups = (nbblocks - first_block + BLOCKS_PER_GROUP - 1) / BLOCKS_PER_GROUP;
 	if(nbgroups < min_nbgroups) nbgroups = min_nbgroups;
 	nbblocks_per_group = rndup((nbblocks - first_block + nbgroups - 1)/nbgroups, 8);
@@ -1936,10 +1956,10 @@
 	gdsz = rndup(nbgroups*sizeof(groupdescriptor),BLOCKSIZE)/BLOCKSIZE;
 	itblsz = nbinodes_per_group * sizeof(inode)/BLOCKSIZE;
 	overhead_per_group = 3 /*sb,bbm,ibm*/ + gdsz + itblsz;
-	if((uint32)nbblocks - 1 < overhead_per_group * nbgroups)
-		error_msg_and_die("too much overhead, try fewer inodes or more blocks. Note: options have changed, see --help or the man page.");
-	free_blocks = nbblocks - overhead_per_group*nbgroups - 1 /*boot block*/;
+	free_blocks = nbblocks - overhead_per_group*nbgroups - first_block;
 	free_blocks_per_group = nbblocks_per_group - overhead_per_group;
+	if(free_blocks < 0)
+		error_msg_and_die("too much overhead, try fewer inodes or more blocks. Note: options have changed, see --help or the man page.");
 
 	if(!(fs = (filesystem*)calloc(nbblocks, BLOCKSIZE)))
 		error_msg_and_die("not enough memory for filesystem");
@@ -1959,28 +1979,31 @@
 	fs->sb.s_wtime = fs_timestamp;
 	fs->sb.s_magic = EXT2_MAGIC_NUMBER;
 	fs->sb.s_lastcheck = fs_timestamp;
+	fs->sb.s_creator_os = creator_os;
 
 	// set up groupdescriptors
-	for(i=0, bbmpos=gdsz+2, ibmpos=bbmpos+1, itblpos=ibmpos+1;
+	for(i=0, bbmpos=first_block+1+gdsz, ibmpos=bbmpos+1, itblpos=ibmpos+1;
 		i<nbgroups;
 		i++, bbmpos+=nbblocks_per_group, ibmpos+=nbblocks_per_group, itblpos+=nbblocks_per_group)
 	{
+		groupdescriptor *gd = get_gd(fs, i);
+
 		if(free_blocks > free_blocks_per_group) {
-			fs->gd[i].bg_free_blocks_count = free_blocks_per_group;
+			gd->bg_free_blocks_count = free_blocks_per_group;
 			free_blocks -= free_blocks_per_group;
 		} else {
-			fs->gd[i].bg_free_blocks_count = free_blocks;
+			gd->bg_free_blocks_count = free_blocks;
 			free_blocks = 0; // this is the last block group
 		}
 		if(i)
-			fs->gd[i].bg_free_inodes_count = nbinodes_per_group;
+			gd->bg_free_inodes_count = nbinodes_per_group;
 		else
-			fs->gd[i].bg_free_inodes_count = nbinodes_per_group -
+			gd->bg_free_inodes_count = nbinodes_per_group -
 							EXT2_FIRST_INO + 2;
-		fs->gd[i].bg_used_dirs_count = 0;
-		fs->gd[i].bg_block_bitmap = bbmpos;
-		fs->gd[i].bg_inode_bitmap = ibmpos;
-		fs->gd[i].bg_inode_table = itblpos;
+		gd->bg_used_dirs_count = 0;
+		gd->bg_block_bitmap = bbmpos;
+		gd->bg_inode_bitmap = ibmpos;
+		gd->bg_inode_table = itblpos;
 	}
 
 	/* Mark non-filesystem blocks and inodes as allocated */
@@ -1988,9 +2011,9 @@
 	for(i = 0; i<nbgroups;i++) {
 
 		/* Block bitmap */
-		bbm = get_blk(fs,fs->gd[i].bg_block_bitmap);	
+		bbm = GRP_GET_GROUP_BBM(fs, i);
 		//non-filesystem blocks
-		for(j = fs->gd[i].bg_free_blocks_count
+		for(j = get_gd(fs, i)->bg_free_blocks_count
 		        + overhead_per_group + 1; j <= BLOCKSIZE * 8; j++)
 			allocate(bbm, j); 
 		//system blocks
@@ -1998,7 +2021,7 @@
 			allocate(bbm, j); 
 		
 		/* Inode bitmap */
-		ibm = get_blk(fs,fs->gd[i].bg_inode_bitmap);	
+		ibm = GRP_GET_GROUP_IBM(fs, i);
 		//non-filesystem inodes
 		for(j = fs->sb.s_inodes_per_group+1; j <= BLOCKSIZE * 8; j++)
 			allocate(ibm, j);
@@ -2012,9 +2035,9 @@
 	// make root inode and directory
 	/* We have groups now. Add the root filesystem in group 0 */
 	/* Also increment the directory count for group 0 */
-	fs->gd[0].bg_free_inodes_count--;
-	fs->gd[0].bg_used_dirs_count = 1;
-	itab0 = (inode *)get_blk(fs,fs->gd[0].bg_inode_table);
+	get_gd(fs, 0)->bg_free_inodes_count--;
+	get_gd(fs, 0)->bg_used_dirs_count = 1;
+	itab0 = (inode *)get_blk(fs, get_gd(fs,0)->bg_inode_table);
 	itab0[EXT2_ROOT_INO-1].i_mode = FM_IFDIR | FM_IRWXU | FM_IRGRP | FM_IROTH | FM_IXGRP | FM_IXOTH; 
 	itab0[EXT2_ROOT_INO-1].i_ctime = fs_timestamp;
 	itab0[EXT2_ROOT_INO-1].i_mtime = fs_timestamp;
@@ -2338,8 +2361,9 @@
 	for (i = 0; i < GRP_NBGROUPS(fs); i++) {
 		printf("Group No: %d\n", i+1);
 		printf("block bitmap: block %d,inode bitmap: block %d, inode table: block %d\n",
-		     fs->gd[i].bg_block_bitmap, fs->gd[i].bg_inode_bitmap,
-		     fs->gd[i].bg_inode_table);
+		     get_gd(fs, i)->bg_block_bitmap,
+		     get_gd(fs, i)->bg_inode_bitmap,
+		     get_gd(fs, i)->bg_inode_table);
 		printf("block bitmap allocation:\n");
 		print_bm(GRP_GET_GROUP_BBM(fs, i),fs->sb.s_blocks_per_group);
 		printf("inode bitmap allocation:\n");
@@ -2421,10 +2445,12 @@
 	"  -x, --starting-image <image>\n"
 	"  -d, --root <directory>\n"
 	"  -D, --devtable <file>\n"
+	"  -B, --block-size <bytes>\n"
 	"  -b, --size-in-blocks <blocks>\n"
 	"  -i, --bytes-per-inode <bytes per inode>\n"
 	"  -N, --number-of-inodes <number of inodes>\n"
 	"  -m, --reserved-percentage <percentage of blocks to reserve>\n"
+	"  -o, --creator-os <os>      'linux', 'hurd', 'freebsd' or a numerical value.\n"
 	"  -g, --block-map <path>     Generate a block map file for this path.\n"
 	"  -e, --fill-value <value>   Fill unallocated blocks with value.\n"
 	"  -z, --allow-holes          Allow files with holes.\n"
@@ -2446,6 +2472,29 @@
 extern char* optarg;
 extern int optind, opterr, optopt;
 
+// parse the value for -o <os>
+int
+lookup_creator_os(const char *name)
+{
+	static const char *const creators[] =
+		{"linux", "hurd", "2", "freebsd", NULL};
+	char *endptr;
+	int i;
+
+	// numerical value ?
+	i = strtol(name, &endptr, 0);
+	if(name[0] && *endptr == '\0')
+		return i;
+
+	// symbolic name ?
+	for(i=0; creators[i]; i++)
+	       if(strcasecmp(creators[i], name) == 0)
+		       return i;
+
+	// whatever ?
+	return -1;
+}
+
 int
 main(int argc, char **argv)
 {
@@ -2455,6 +2504,7 @@
 	float bytes_per_inode = -1;
 	float reserved_frac = -1;
 	int fs_timestamp = -1;
+	int creator_os = CREATOR_OS;
 	char * fsout = "-";
 	char * fsin = 0;
 	char * dopt[MAX_DOPT];
@@ -2478,10 +2528,12 @@
 	  { "starting-image",	required_argument,	NULL, 'x' },
 	  { "root",		required_argument,	NULL, 'd' },
 	  { "devtable",		required_argument,	NULL, 'D' },
+	  { "block-size",	required_argument,	NULL, 'B' },
 	  { "size-in-blocks",	required_argument,	NULL, 'b' },
 	  { "bytes-per-inode",	required_argument,	NULL, 'i' },
 	  { "number-of-inodes",	required_argument,	NULL, 'N' },
 	  { "reserved-percentage", required_argument,	NULL, 'm' },
+	  { "creator-os",	required_argument,	NULL, 'o' },
 	  { "block-map",	required_argument,	NULL, 'g' },
 	  { "fill-value",	required_argument,	NULL, 'e' },
 	  { "allow-holes",	no_argument, 		NULL, 'z' },
@@ -2497,11 +2549,11 @@
 
 	app_name = argv[0];
 
-	while((c = getopt_long(argc, argv, "x:d:D:b:i:N:m:g:e:zfqUPhVv", longopts, NULL)) != EOF) {
+	while((c = getopt_long(argc, argv, "x:d:D:B:b:i:N:m:o:g:e:zfqUPhVv", longopts, NULL)) != EOF) {
 #else
 	app_name = argv[0];
 
-	while((c = getopt(argc, argv,      "x:d:D:b:i:N:m:g:e:zfqUPhVv")) != EOF) {
+	while((c = getopt(argc, argv,      "x:d:D:B:b:i:N:m:o:g:e:zfqUPhVv")) != EOF) {
 #endif /* HAVE_GETOPT_LONG */
 		switch(c)
 		{
@@ -2512,6 +2564,9 @@
 			case 'D':
 				dopt[didx++] = optarg;
 				break;
+			case 'B':
+				blocksize = SI_atof(optarg);
+				break;
 			case 'b':
 				nbblocks = SI_atof(optarg);
 				break;
@@ -2524,6 +2579,9 @@
 			case 'm':
 				reserved_frac = SI_atof(optarg) / 100;
 				break;
+			case 'o':
+				creator_os = lookup_creator_os(optarg);
+				break;
 			case 'g':
 				gopt[gidx++] = optarg;
 				break;
@@ -2567,6 +2625,11 @@
 		error_msg_and_die("Not enough arguments. Try --help or else see the man page.");
 	fsout = argv[optind];
 
+	if(blocksize != 1024 && blocksize != 2048 && blocksize != 4096)
+		error_msg_and_die("Valid block sizes: 1024, 2048 or 4096.");
+	if(creator_os < 0)
+		error_msg_and_die("Creator OS unknown.");
+
 	hdlinks.hdl = (struct hdlink_s *)malloc(hdlink_cnt * sizeof(struct hdlink_s));
 	if (!hdlinks.hdl)
 		error_msg_and_die("Not enough memory");
@@ -2611,7 +2674,8 @@
 		}
 		if(fs_timestamp == -1)
 			fs_timestamp = time(NULL);
-		fs = init_fs(nbblocks, nbinodes, nbresrvd, holes, fs_timestamp);
+		fs = init_fs(nbblocks, nbinodes, nbresrvd, holes,
+				fs_timestamp, creator_os);
 	}
 	
 	populate_fs(fs, dopt, didx, squash_uids, squash_perms, fs_timestamp, NULL);
Index: genext2fs/test-gen.lib
===================================================================
--- genext2fs.orig/test-gen.lib	2011-09-03 13:40:35.000000000 +0200
+++ genext2fs/test-gen.lib	2011-09-03 14:21:17.000000000 +0200
@@ -8,7 +8,7 @@
 # Creates an image with a file of given size
 # Usage: dgen file-size number-of-blocks 
 dgen () {
-	size=$1; blocks=$2
+	size=$1; blocks=$2; blocksz=$3;
 	rm -rf test
 	mkdir -p test
 	cd test
@@ -20,7 +20,7 @@
         chmod 777 file.$1
 	TZ=UTC-11 touch -t 200502070321.43 file.$1 .
 	cd ..
-	./genext2fs -N 17 -b $blocks -d test -f -q ext2.img 
+	./genext2fs -B $blocksz -N 17 -b $blocks -d test -f -o Linux -q ext2.img
 }
 
 # fgen - Exercises the -f spec-file option of genext2fs
@@ -31,7 +31,7 @@
 	mkdir -p test
 	cp $fname test
 	TZ=UTC-11 touch -t 200502070321.43 test/$fname
-	./genext2fs -N 92 -b $blocks -D test/$fname -f ext2.img
+	./genext2fs -N 92 -b $blocks -D test/$fname -f -o Linux ext2.img
 }
 
 # gen_cleanup - Remove the files generated by the above functions
Index: genext2fs/test-mount.sh
===================================================================
--- genext2fs.orig/test-mount.sh	2011-09-03 13:40:35.000000000 +0200
+++ genext2fs/test-mount.sh	2011-09-03 14:21:17.000000000 +0200
@@ -33,9 +33,9 @@
 # and returns the command line with which to invoke dtest()
 # Usage: dtest-mount file-size number-of-blocks 
 dtest_mount () {
-	size=$1; blocks=$2
-	echo Testing with file of size $size
-	dgen $size $blocks
+	size=$1; blocks=$2; blocksz=$3;
+	echo Testing $blocks blocks of $blocksz bytes with file of size $size
+	dgen $size $blocks $blocksz
 	/sbin/e2fsck -fn ext2.img || fail
 	mkdir -p mnt
 	mount -t ext2 -o ro,loop ext2.img mnt || fail
@@ -44,7 +44,7 @@
 	                                awk '{print $5}'`" ] ; then
 		fail
 	fi
-	pass dtest $size $blocks
+	pass dtest $size $blocks $blocksz
 }
 
 # ftest-mount - Exercise the -f spec-file option of genext2fs
@@ -75,13 +75,21 @@
 	pass ftest $fname $blocks
 }
 
-dtest_mount 0 4096 
-dtest_mount 0 8193
-dtest_mount 0 8194
-dtest_mount 1 4096 
-dtest_mount 12288 4096 
-dtest_mount 274432 4096 
-dtest_mount 8388608 9000 
-dtest_mount 16777216 20000
+dtest_mount 0 4096 1024
+dtest_mount 0 2048 2048
+dtest_mount 0 1024 4096
+dtest_mount 0 8193 1024
+dtest_mount 0 8194 1024
+dtest_mount 0 8193 4096
+dtest_mount 0 8194 2048
+dtest_mount 1 4096 1024
+dtest_mount 1 1024 4096
+dtest_mount 12288 4096 1024
+dtest_mount 274432 4096 1024
+dtest_mount 8388608 9000 1024
+dtest_mount 8388608 4500 2048
+dtest_mount 8388608 2250 4096
+dtest_mount 16777216 20000 1024
+dtest_mount 16777216 10000 2048
 
 ftest_mount device_table.txt 4096 
Index: genext2fs/test.sh
===================================================================
--- genext2fs.orig/test.sh	2011-09-03 13:40:35.000000000 +0200
+++ genext2fs/test.sh	2011-09-03 14:21:17.000000000 +0200
@@ -30,9 +30,9 @@
 # Creates an image with a file of given size and verifies it
 # Usage: dtest file-size number-of-blocks correct-checksum
 dtest () {
-	size=$1; blocks=$2; checksum=$3
+	size=$1; blocks=$2; blocksz=$3; checksum=$4
 	echo Testing with file of size $size
-	dgen $size $blocks
+	dgen $size $blocks $blocksz
 	md5cmp $checksum
 	gen_cleanup
 }
@@ -53,12 +53,20 @@
 # replace the following lines with the output of
 # sudo sh test-mount.sh|grep test
 
-dtest 0 4096 3bc6424b8fcd51a0de34ee59d91d5f16
-dtest 0 8193 f174804f6b433b552706cbbfc60c416d
-dtest 0 8194 4855a55d0cbdc44584634df49ebd5711
-dtest 1 4096 09c569b6bfb45222c729c42d04d5451f
-dtest 12288 4096 61febcbfbf32024ef99103fcdc282c39
-dtest 274432 4096 0c517803552c55c1806e4220b0a0164f
-dtest 8388608 9000 e0e5ea15bced10ab486d8135584b5d8e
-dtest 16777216 20000 fdf636eb905ab4dc1bf76dce5ac5d209
+dtest 0 4096 1024 3bc6424b8fcd51a0de34ee59d91d5f16
+dtest 0 2048 2048 230afa16496df019878cc2370c661cdc
+dtest 0 1024 4096 ebff5eeb38b70f3f1cd081e60eb44561
+dtest 0 8193 1024 f174804f6b433b552706cbbfc60c416d
+dtest 0 8194 1024 4855a55d0cbdc44584634df49ebd5711
+dtest 0 8193 4096 c493679698418ec7e6552005e2d2a6d8
+dtest 0 8194 2048 ec13f328fa7543563f35f494bddc059c
+dtest 1 4096 1024 09c569b6bfb45222c729c42d04d5451f
+dtest 1 1024 4096 d318a326fdc907810ae9e6b0a20e9b06
+dtest 12288 4096 1024 61febcbfbf32024ef99103fcdc282c39
+dtest 274432 4096 1024 0c517803552c55c1806e4220b0a0164f
+dtest 8388608 9000 1024 e0e5ea15bced10ab486d8135584b5d8e
+dtest 8388608 4500 2048 39f4d537a72f5053fd6891721c59680d
+dtest 8388608 2250 4096 1d697fa4bc2cfffe02ac91edfadc40bf
+dtest 16777216 20000 1024 fdf636eb905ab4dc1bf76dce5ac5d209
+dtest 16777216 10000 2048 f9824a81ea5e74fdf469c097927c292b
 ftest device_table.txt 4096 a0af06d944b11d2902dfd705484c64cc