cramfs: new package

menu "Hardware handling"

source "package/acpid/Config.in"

source "package/cramfs/Config.in"

source "package/dbus/Config.in"

source "package/dbus-glib/Config.in"

source "package/dbus-python/Config.in"

config BR2_PACKAGE_CRAMFS

       bool "cramfs"

       help

         cramfs is a comporessed read-only filesystem. This package

         contains the tools to generate and check a cramfs filesystem.

	 http://sourceforge.net/projects/cramfs/

 No newline at end of file

--- cramfs-1.1/mkcramfs.c.orig	2005-04-13 05:55:57.000000000 -0600

+++ cramfs-1.1/mkcramfs.c	2005-04-13 16:19:57.000000000 -0600

@@ -117,6 +117,7 @@

 static int opt_squash = 0;

 static char *opt_image = NULL;

 static char *opt_name = NULL;

+static int swap_endian = 0;

 static int warn_dev, warn_gid, warn_namelen, warn_skip, warn_size, warn_uid;

 static const char *const memory_exhausted = "memory exhausted";

@@ -155,6 +156,8 @@

 		" -i file    insert a file image into the filesystem (requires >= 2.4.0)\n"

 		" -n name    set name of cramfs filesystem\n"

 		" -p         pad by %d bytes for boot code\n"

+		" -l         litte endian filesystem\n"

+		" -b         big endian filesystem\n"

 		" -s         sort directory entries (old option, ignored)\n"

 		" -v         be more verbose\n"

 		" -z         make explicit holes (requires >= 2.3.39)\n"

@@ -504,6 +506,50 @@

 	return totalsize;

 }

+/* routines to swap endianness/bitfields in inode/superblock block data */

+static void fix_inode(struct cramfs_inode *inode)

+{

+#define wswap(x)    (((x)>>24) | (((x)>>8)&0xff00) | (((x)&0xff00)<<8) | (((x)&0xff)<<24))

+	/* attempt #2 */

+	inode->mode = (inode->mode >> 8) | ((inode->mode&0xff)<<8);

+	inode->uid = (inode->uid >> 8) | ((inode->uid&0xff)<<8);

+	inode->size = (inode->size >> 16) | (inode->size&0xff00) |

+		((inode->size&0xff)<<16);

+	((u32*)inode)[2] = wswap(inode->offset | (inode->namelen<<26));

+}

+

+static void fix_offset(struct cramfs_inode *inode, u32 offset)

+{

+	u32 tmp = wswap(((u32*)inode)[2]);

+	((u32*)inode)[2] = wswap((offset >> 2) | (tmp&0xfc000000));

+}

+

+static void fix_block_pointer(u32 *p)

+{

+	*p = wswap(*p);

+}

+

+static void fix_super(struct cramfs_super *super)

+{

+	u32 *p = (u32*)super;

+

+	/* fix superblock fields */

+	p[0] = wswap(p[0]);	/* magic */

+	p[1] = wswap(p[1]);	/* size */

+	p[2] = wswap(p[2]);	/* flags */

+	p[3] = wswap(p[3]);	/* future */

+

+	/* fix filesystem info fields */

+	p = (u32*)&super->fsid;

+	p[0] = wswap(p[0]);	/* crc */

+	p[1] = wswap(p[1]);	/* edition */

+	p[2] = wswap(p[2]);	/* blocks */

+	p[3] = wswap(p[3]);	/* files */

+

+	fix_inode(&super->root);

+#undef wswap

+}

+

 /* Returns sizeof(struct cramfs_super), which includes the root inode. */

 static unsigned int write_superblock(struct entry *root, char *base, int size)

 {

@@ -539,6 +585,7 @@

 	super->root.gid = root->gid;

 	super->root.size = root->size;

 	super->root.offset = offset >> 2;

+	if (swap_endian) fix_super(super);

 	return offset;

 }

@@ -553,7 +600,10 @@

 	if (offset >= (1 << (2 + CRAMFS_OFFSET_WIDTH))) {

 		error_msg_and_die("filesystem too big");

 	}

-	inode->offset = (offset >> 2);

+	if (swap_endian)

+		fix_offset(inode, offset);

+	else

+		inode->offset = (offset >> 2);

 }

 /*

@@ -638,6 +688,7 @@

 				stack_entries++;

 			}

 			entry = entry->next;

+			if (swap_endian) fix_inode(inode);

 		}

 		/*

@@ -734,6 +785,7 @@

 		}

 		*(u32 *) (base + offset) = curr;

+		if (swap_endian) fix_block_pointer((u32*)(base + offset));

 		offset += 4;

 	} while (size);

@@ -1146,7 +1198,7 @@

 		progname = argv[0];

 	/* command line options */

-	while ((c = getopt(argc, argv, "hEe:i:n:psvzD:q")) != EOF) {

+	while ((c = getopt(argc, argv, "hEe:i:n:psvzD:qlb")) != EOF) {

 		switch (c) {

 		case 'h':

 			usage(MKFS_OK);

@@ -1174,6 +1227,18 @@

 			opt_pad = PAD_SIZE;

 			fslen_ub += PAD_SIZE;

 			break;

+		case 'b':

+#if __BYTE_ORDER == __LITTLE_ENDIAN

+			swap_endian = 1;

+			printf("Swapping filesystem endian-ness\n");

+#endif

+			break;

+		case 'l':

+#if __BYTE_ORDER == __BIG_ENDIAN

+			swap_endian = 1;

+			printf("Swapping filesystem endian-ness\n");

+#endif

+			break;

 		case 's':

 			/* old option, ignored */

 			break;

--- cramfs-1.1/cramfsck.c.orig	2005-04-25 11:50:31.000000000 -0700

+++ cramfs-1.1/cramfsck.c	2005-04-25 16:53:25.000000000 -0700

@@ -30,6 +30,7 @@

  * 2000/07/15: Daniel Quinlan (initial support for block devices)

  * 2002/01/10: Daniel Quinlan (additional checks, test more return codes,

  *                            use read if mmap fails, standardize messages)

+ * 2004/09/01: Alfonso Acosta (Add swapping support)

  */

 /* compile-time options */

@@ -51,6 +52,7 @@

 #include <utime.h>

 #include <sys/ioctl.h>

 #define _LINUX_STRING_H_

+#include <byteswap.h>

 #include "linux/cramfs_fs.h"

 #include <zlib.h>

@@ -74,6 +76,7 @@

 static char *filename;		/* ROM image filename */

 struct cramfs_super super;	/* just find the cramfs superblock once */

 static int opt_verbose = 0;	/* 1 = verbose (-v), 2+ = very verbose (-vv) */

+static int need_swapping = 0;   /* fs and host dont have the same endianness */

 #ifdef INCLUDE_FS_TESTS

 static int opt_extract = 0;		/* extract cramfs (-x) */

 static char *extract_dir = "/";	/* extraction directory (-x) */

@@ -85,6 +88,9 @@

 static unsigned long start_data = ~0UL;	/* start of the data (256 MB = max) */

 static unsigned long end_data = 0;	/* end of the data */

+/* access 32 byte variables */

+#define CRAMFS_32(x)  (need_swapping ? bswap_32(x) : x)

+

 /* Guarantee access to at least 8kB at a time */

 #define ROMBUFFER_BITS	13

 #define ROMBUFFERSIZE	(1 << ROMBUFFER_BITS)

@@ -166,20 +172,34 @@

 	if (super.magic == CRAMFS_MAGIC) {

 		*start = 0;

 	}

+	else if (super.magic == bswap_32(CRAMFS_MAGIC)) {

+		*start = 0;

+		need_swapping = 1;

+	}

+

 	else if (*length >= (PAD_SIZE + sizeof(super))) {

 		lseek(fd, PAD_SIZE, SEEK_SET);

 		if (read(fd, &super, sizeof(super)) != sizeof(super)) {

 			die(FSCK_ERROR, 1, "read failed: %s", filename);

 		}

-		if (super.magic == CRAMFS_MAGIC) {

+		if (super.magic == CRAMFS_32(CRAMFS_MAGIC)) {

 			*start = PAD_SIZE;

 		}

 	}

 	/* superblock tests */

-	if (super.magic != CRAMFS_MAGIC) {

+	if (super.magic != CRAMFS_32(CRAMFS_MAGIC)) {

 		die(FSCK_UNCORRECTED, 0, "superblock magic not found");

 	}

+	if (need_swapping){

+		super.size = bswap_32(super.size);

+		super.flags = bswap_32(super.flags);

+		super.future = bswap_32(super.future);

+		super.fsid.crc = bswap_32(super.fsid.crc);

+		super.fsid.edition = bswap_32(super.fsid.edition);

+		super.fsid.blocks = bswap_32(super.fsid.blocks);

+		super.fsid.files = bswap_32(super.fsid.files); 

+	}	

 	if (super.flags & ~CRAMFS_SUPPORTED_FLAGS) {

 		die(FSCK_ERROR, 0, "unsupported filesystem features");

 	}

@@ -215,7 +235,10 @@

 		die(FSCK_USAGE, 0, "unable to test CRC: old cramfs format");

 #endif /* not INCLUDE_FS_TESTS */

 	}

-

+	else if (need_swapping) {

+       /* crc checking in this case would mean  translating the whole file */

+		return;

+	}

 	crc = crc32(0L, Z_NULL, 0);

 	buf = mmap(NULL, super.size, PROT_READ | PROT_WRITE, MAP_PRIVATE, fd, 0);

@@ -300,12 +323,23 @@

 static struct cramfs_inode *cramfs_iget(struct cramfs_inode * i)

 {

+#define wswap(x)    (((x)>>24) | (((x)>>8)&0xff00) | (((x)&0xff00)<<8) | (((x)&0xff)<<24))

 	struct cramfs_inode *inode = malloc(sizeof(struct cramfs_inode));

 	if (!inode) {

 		die(FSCK_ERROR, 1, "malloc failed");

 	}

-	*inode = *i;

+	if(!need_swapping) {

+		*inode = *i;

+	}

+	else { 

+		inode->mode=bswap_16(i->mode);

+		inode->uid=bswap_16(i->uid);

+		inode->size=bswap_32(i->size << 8);

+		inode->gid=i->gid;

+		inode->namelen = bswap_32(((u32*)i)[2]) >> 26;

+		inode->offset = bswap_32(((u32*)i)[2]) & 0x3FFFFFFF;

+	}

 	return inode;

 }

@@ -324,9 +358,9 @@

  */

 static struct cramfs_inode *read_super(void)

 {

-	unsigned long offset = super.root.offset << 2;

-

-	if (!S_ISDIR(super.root.mode))

+	struct cramfs_inode *root = cramfs_iget(&super.root);

+	unsigned long offset = root->offset << 2; 

+	if (!S_ISDIR(root->mode))

 		die(FSCK_UNCORRECTED, 0, "root inode is not directory");

 	if (!(super.flags & CRAMFS_FLAG_SHIFTED_ROOT_OFFSET) &&

 	    ((offset != sizeof(struct cramfs_super)) &&

@@ -334,7 +368,7 @@

 	{

 		die(FSCK_UNCORRECTED, 0, "bad root offset (%lu)", offset);

 	}

-	return cramfs_iget(&super.root);

+	return root;

 }

 static int uncompress_block(void *src, int len)

@@ -366,7 +400,7 @@

 	do {

 		unsigned long out = PAGE_CACHE_SIZE;

-		unsigned long next = *(u32 *) romfs_read(offset);

+		unsigned long next = CRAMFS_32(*(u32 *) romfs_read(offset));

 		if (next > end_data) {

 			end_data = next;

@@ -529,7 +563,7 @@

 {

 	unsigned long offset = i->offset << 2;

 	unsigned long curr = offset + 4;

-	unsigned long next = *(u32 *) romfs_read(offset);

+	unsigned long next = CRAMFS_32(*(u32 *) romfs_read(offset));

 	unsigned long size;

 	if (offset == 0) {

--- cramfs-1.1/cramfsck.c.orig	2006-12-22 22:16:59.328125000 +1100

+++ cramfs-1.1/cramfsck.c	2006-12-19 01:02:05.531250000 +1100

@@ -56,6 +56,10 @@

 #include "linux/cramfs_fs.h"

 #include <zlib.h>

+#ifdef __CYGWIN__

+#define _IO(type,nr)	_IOC(_IOC_NONE,(type),(nr),0)

+#endif /* __CYGWIN__ */

+

 #define BLKGETSIZE	_IO(0x12,96) /* return device size /512 (long *arg) */

 /* Exit codes used by fsck-type programs */