Make ar7_part more readable and endianness safe

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@8886 3c298f89-4303-0410-b956-a3cf2f4a3e73

2 files changed, 64 insertions, 42 deletions

diff --git a/target/linux/ar7/files/drivers/mtd/ar7part.c b/target/linux/ar7/files/drivers/mtd/ar7part.c
index 775041d7d..8bfd5711a 100644
--- a/target/linux/ar7/files/drivers/mtd/ar7part.c
+++ b/target/linux/ar7/files/drivers/mtd/ar7part.c
@@ -26,7 +26,18 @@
 #include <linux/mtd/mtd.h>
 #include <linux/mtd/partitions.h>
 #include <linux/bootmem.h>
-#include <linux/squashfs_fs.h>
+#include <linux/magic.h>
+
+#define AR7_PARTS	4
+#define ROOT_OFFSET	0xe0000
+
+#ifdef CONFIG_CPU_LITTLE_ENDIAN
+#define LOADER_MAGIC1	0xfeedfa42
+#define LOADER_MAGIC2	0xfeed1281
+#else
+#define LOADER_MAGIC1	0x42faedfe
+#define LOADER_MAGIC2	0x8112edfe
+#endif
 
 struct ar7_bin_rec {
 	unsigned int checksum;
@@ -34,7 +45,7 @@ struct ar7_bin_rec {
 	unsigned int address;
 };
 
-static struct mtd_partition ar7_parts[5];
+static struct mtd_partition ar7_parts[AR7_PARTS];
 
 static int create_mtd_partitions(struct mtd_info *master,
 				 struct mtd_partition **pparts,
@@ -43,12 +54,10 @@ static int create_mtd_partitions(struct mtd_info *master,
 	struct ar7_bin_rec header;
 	unsigned int offset, len;
 	unsigned int pre_size = master->erasesize, post_size = 0;
-	unsigned int root_offset = 0xe0000;
+	unsigned int root_offset = ROOT_OFFSET;
 
 	int retries = 10;
 
-	printk(KERN_INFO "Parsing AR7 partition map...\n");
-
 	ar7_parts[0].name = "loader";
 	ar7_parts[0].offset = 0;
 	ar7_parts[0].size = master->erasesize;
@@ -65,9 +74,9 @@ static int create_mtd_partitions(struct mtd_info *master,
 			sizeof(header), &len, (u_char *)&header);
 		if (!strncmp((char *)&header, "TIENV0.8", 8))
 			ar7_parts[1].offset = pre_size;
-		if (header.checksum == 0xfeedfa42)
+		if (header.checksum == LOADER_MAGIC1)
 			break;
-		if (header.checksum == 0xfeed1281)
+		if (header.checksum == LOADER_MAGIC2)
 			break;
 		pre_size += master->erasesize;
 	} while (retries--);
@@ -80,7 +89,7 @@ static int create_mtd_partitions(struct mtd_info *master,
 	}
 
 	switch (header.checksum) {
-	case 0xfeedfa42:
+	case LOADER_MAGIC1:
 		while (header.length) {
 			offset += sizeof(header) + header.length;
 			master->read(master, offset, sizeof(header),
@@ -88,7 +97,7 @@ static int create_mtd_partitions(struct mtd_info *master,
 		}
 		root_offset = offset + sizeof(header) + 4;
 		break;
-	case 0xfeed1281:
+	case LOADER_MAGIC2:
 		while (header.length) {
 			offset += sizeof(header) + header.length;
 			master->read(master, offset, sizeof(header),
@@ -120,7 +129,7 @@ static int create_mtd_partitions(struct mtd_info *master,
 	ar7_parts[3].mask_flags = 0;
 
 	*pparts = ar7_parts;
-	return 4;
+	return AR7_PARTS;
 }
 
 static struct mtd_part_parser ar7_parser = {
diff --git a/target/linux/generic-2.6/patches-2.6.22/001-squashfs.patch b/target/linux/generic-2.6/patches-2.6.22/001-squashfs.patch
index 38306841d..efe21bf72 100644
--- a/target/linux/generic-2.6/patches-2.6.22/001-squashfs.patch
+++ b/target/linux/generic-2.6/patches-2.6.22/001-squashfs.patch
@@ -1,6 +1,6 @@
-diff -urN linux-2.6.21.1.old/fs/Kconfig linux-2.6.21.1.dev/fs/Kconfig
---- linux-2.6.21.1.old/fs/Kconfig	2007-04-27 23:49:26.000000000 +0200
-+++ linux-2.6.21.1.dev/fs/Kconfig	2007-05-26 19:00:37.121351760 +0200
+diff -urN linux-2.6.22.4/fs/Kconfig linux-2.6.22.4-squashfs/fs/Kconfig
+--- linux-2.6.22.4/fs/Kconfig	2007-08-21 06:33:06.000000000 +0200
++++ linux-2.6.22.4-squashfs/fs/Kconfig	2007-09-20 19:13:44.000000000 +0200
 @@ -1367,6 +1367,71 @@
  
  	  If unsure, say N.
@@ -73,9 +73,9 @@ diff -urN linux-2.6.21.1.old/fs/Kconfig linux-2.6.21.1.dev/fs/Kconfig
  config VXFS_FS
  	tristate "FreeVxFS file system support (VERITAS VxFS(TM) compatible)"
  	depends on BLOCK
-diff -urN linux-2.6.21.1.old/fs/Makefile linux-2.6.21.1.dev/fs/Makefile
---- linux-2.6.21.1.old/fs/Makefile	2007-04-27 23:49:26.000000000 +0200
-+++ linux-2.6.21.1.dev/fs/Makefile	2007-05-26 19:00:37.121351760 +0200
+diff -urN linux-2.6.22.4/fs/Makefile linux-2.6.22.4-squashfs/fs/Makefile
+--- linux-2.6.22.4/fs/Makefile	2007-08-21 06:33:06.000000000 +0200
++++ linux-2.6.22.4-squashfs/fs/Makefile	2007-09-20 19:13:44.000000000 +0200
 @@ -72,6 +72,7 @@
  obj-$(CONFIG_JBD2)		+= jbd2/
  obj-$(CONFIG_EXT2_FS)		+= ext2/
@@ -84,9 +84,9 @@ diff -urN linux-2.6.21.1.old/fs/Makefile linux-2.6.21.1.dev/fs/Makefile
  obj-$(CONFIG_RAMFS)		+= ramfs/
  obj-$(CONFIG_HUGETLBFS)		+= hugetlbfs/
  obj-$(CONFIG_CODA_FS)		+= coda/
-diff -urN linux-2.6.21.1.old/fs/squashfs/inode.c linux-2.6.21.1.dev/fs/squashfs/inode.c
---- linux-2.6.21.1.old/fs/squashfs/inode.c	1970-01-01 01:00:00.000000000 +0100
-+++ linux-2.6.21.1.dev/fs/squashfs/inode.c	2007-05-26 19:00:37.123351456 +0200
+diff -urN linux-2.6.22.4/fs/squashfs/inode.c linux-2.6.22.4-squashfs/fs/squashfs/inode.c
+--- linux-2.6.22.4/fs/squashfs/inode.c	1970-01-01 01:00:00.000000000 +0100
++++ linux-2.6.22.4-squashfs/fs/squashfs/inode.c	2007-09-20 19:13:44.000000000 +0200
 @@ -0,0 +1,2122 @@
 +/*
 + * Squashfs - a compressed read only filesystem for Linux
@@ -2210,9 +2210,9 @@ diff -urN linux-2.6.21.1.old/fs/squashfs/inode.c linux-2.6.21.1.dev/fs/squashfs/
 +MODULE_DESCRIPTION("squashfs, a compressed read-only filesystem");
 +MODULE_AUTHOR("Phillip Lougher <phillip@lougher.org.uk>");
 +MODULE_LICENSE("GPL");
-diff -urN linux-2.6.21.1.old/fs/squashfs/Makefile linux-2.6.21.1.dev/fs/squashfs/Makefile
---- linux-2.6.21.1.old/fs/squashfs/Makefile	1970-01-01 01:00:00.000000000 +0100
-+++ linux-2.6.21.1.dev/fs/squashfs/Makefile	2007-05-26 19:00:37.123351456 +0200
+diff -urN linux-2.6.22.4/fs/squashfs/Makefile linux-2.6.22.4-squashfs/fs/squashfs/Makefile
+--- linux-2.6.22.4/fs/squashfs/Makefile	1970-01-01 01:00:00.000000000 +0100
++++ linux-2.6.22.4-squashfs/fs/squashfs/Makefile	2007-09-20 19:13:44.000000000 +0200
 @@ -0,0 +1,7 @@
 +#
 +# Makefile for the linux squashfs routines.
@@ -2221,9 +2221,9 @@ diff -urN linux-2.6.21.1.old/fs/squashfs/Makefile linux-2.6.21.1.dev/fs/squashfs
 +obj-$(CONFIG_SQUASHFS) += squashfs.o
 +squashfs-y += inode.o
 +squashfs-y += squashfs2_0.o
-diff -urN linux-2.6.21.1.old/fs/squashfs/squashfs2_0.c linux-2.6.21.1.dev/fs/squashfs/squashfs2_0.c
---- linux-2.6.21.1.old/fs/squashfs/squashfs2_0.c	1970-01-01 01:00:00.000000000 +0100
-+++ linux-2.6.21.1.dev/fs/squashfs/squashfs2_0.c	2007-05-26 19:00:37.125351152 +0200
+diff -urN linux-2.6.22.4/fs/squashfs/squashfs2_0.c linux-2.6.22.4-squashfs/fs/squashfs/squashfs2_0.c
+--- linux-2.6.22.4/fs/squashfs/squashfs2_0.c	1970-01-01 01:00:00.000000000 +0100
++++ linux-2.6.22.4-squashfs/fs/squashfs/squashfs2_0.c	2007-09-20 19:13:44.000000000 +0200
 @@ -0,0 +1,758 @@
 +/*
 + * Squashfs - a compressed read only filesystem for Linux
@@ -2983,9 +2983,9 @@ diff -urN linux-2.6.21.1.old/fs/squashfs/squashfs2_0.c linux-2.6.21.1.dev/fs/squ
 +
 +	return 1;
 +}
-diff -urN linux-2.6.21.1.old/fs/squashfs/squashfs.h linux-2.6.21.1.dev/fs/squashfs/squashfs.h
---- linux-2.6.21.1.old/fs/squashfs/squashfs.h	1970-01-01 01:00:00.000000000 +0100
-+++ linux-2.6.21.1.dev/fs/squashfs/squashfs.h	2007-05-26 19:00:37.125351152 +0200
+diff -urN linux-2.6.22.4/fs/squashfs/squashfs.h linux-2.6.22.4-squashfs/fs/squashfs/squashfs.h
+--- linux-2.6.22.4/fs/squashfs/squashfs.h	1970-01-01 01:00:00.000000000 +0100
++++ linux-2.6.22.4-squashfs/fs/squashfs/squashfs.h	2007-09-20 19:13:44.000000000 +0200
 @@ -0,0 +1,86 @@
 +/*
 + * Squashfs - a compressed read only filesystem for Linux
@@ -3073,9 +3073,22 @@ diff -urN linux-2.6.21.1.old/fs/squashfs/squashfs.h linux-2.6.21.1.dev/fs/squash
 +	return 0;
 +}
 +#endif
-diff -urN linux-2.6.21.1.old/include/linux/squashfs_fs.h linux-2.6.21.1.dev/include/linux/squashfs_fs.h
---- linux-2.6.21.1.old/include/linux/squashfs_fs.h	1970-01-01 01:00:00.000000000 +0100
-+++ linux-2.6.21.1.dev/include/linux/squashfs_fs.h	2007-05-26 19:00:37.143348416 +0200
+diff -urN linux-2.6.22.4/include/linux/magic.h linux-2.6.22.4-squashfs/include/linux/magic.h
+--- linux-2.6.22.4/include/linux/magic.h	2007-08-21 06:33:06.000000000 +0200
++++ linux-2.6.22.4-squashfs/include/linux/magic.h	2007-09-20 19:15:43.000000000 +0200
+@@ -36,6 +36,9 @@
+ #define REISER2FS_SUPER_MAGIC_STRING	"ReIsEr2Fs"
+ #define REISER2FS_JR_SUPER_MAGIC_STRING	"ReIsEr3Fs"
+ 
++#define SQUASHFS_MAGIC			0x73717368
++#define SQUASHFS_MAGIC_SWAP		0x68737173
++
+ #define SMB_SUPER_MAGIC		0x517B
+ #define USBDEVICE_SUPER_MAGIC	0x9fa2
+ 
+diff -urN linux-2.6.22.4/include/linux/squashfs_fs.h linux-2.6.22.4-squashfs/include/linux/squashfs_fs.h
+--- linux-2.6.22.4/include/linux/squashfs_fs.h	1970-01-01 01:00:00.000000000 +0100
++++ linux-2.6.22.4-squashfs/include/linux/squashfs_fs.h	2007-09-20 19:15:01.000000000 +0200
 @@ -0,0 +1,911 @@
 +#ifndef SQUASHFS_FS
 +#define SQUASHFS_FS
@@ -3117,8 +3130,6 @@ diff -urN linux-2.6.21.1.old/include/linux/squashfs_fs.h linux-2.6.21.1.dev/incl
 +#define SQUASHFS_CACHED_FRAGMENTS	CONFIG_SQUASHFS_FRAGMENT_CACHE_SIZE
 +#define SQUASHFS_MAJOR			3
 +#define SQUASHFS_MINOR			0
-+#define SQUASHFS_MAGIC			0x73717368
-+#define SQUASHFS_MAGIC_SWAP		0x68737173
 +#define SQUASHFS_START			0
 +
 +/* size of metadata (inode and directory) blocks */
@@ -3263,6 +3274,8 @@ diff -urN linux-2.6.21.1.old/include/linux/squashfs_fs.h linux-2.6.21.1.dev/incl
 +#define SQUASHFS_META_NUMBER	8
 +#define SQUASHFS_SLOTS		4
 +
++#include <linux/magic.h>
++
 +struct meta_entry {
 +	long long		data_block;
 +	unsigned int		index_block;
@@ -3988,9 +4001,9 @@ diff -urN linux-2.6.21.1.old/include/linux/squashfs_fs.h linux-2.6.21.1.dev/incl
 +
 +#endif
 +#endif
-diff -urN linux-2.6.21.1.old/include/linux/squashfs_fs_i.h linux-2.6.21.1.dev/include/linux/squashfs_fs_i.h
---- linux-2.6.21.1.old/include/linux/squashfs_fs_i.h	1970-01-01 01:00:00.000000000 +0100
-+++ linux-2.6.21.1.dev/include/linux/squashfs_fs_i.h	2007-05-26 19:00:37.143348416 +0200
+diff -urN linux-2.6.22.4/include/linux/squashfs_fs_i.h linux-2.6.22.4-squashfs/include/linux/squashfs_fs_i.h
+--- linux-2.6.22.4/include/linux/squashfs_fs_i.h	1970-01-01 01:00:00.000000000 +0100
++++ linux-2.6.22.4-squashfs/include/linux/squashfs_fs_i.h	2007-09-20 19:13:44.000000000 +0200
 @@ -0,0 +1,45 @@
 +#ifndef SQUASHFS_FS_I
 +#define SQUASHFS_FS_I
@@ -4037,9 +4050,9 @@ diff -urN linux-2.6.21.1.old/include/linux/squashfs_fs_i.h linux-2.6.21.1.dev/in
 +	struct inode	vfs_inode;
 +};
 +#endif
-diff -urN linux-2.6.21.1.old/include/linux/squashfs_fs_sb.h linux-2.6.21.1.dev/include/linux/squashfs_fs_sb.h
---- linux-2.6.21.1.old/include/linux/squashfs_fs_sb.h	1970-01-01 01:00:00.000000000 +0100
-+++ linux-2.6.21.1.dev/include/linux/squashfs_fs_sb.h	2007-05-26 19:00:37.144348264 +0200
+diff -urN linux-2.6.22.4/include/linux/squashfs_fs_sb.h linux-2.6.22.4-squashfs/include/linux/squashfs_fs_sb.h
+--- linux-2.6.22.4/include/linux/squashfs_fs_sb.h	1970-01-01 01:00:00.000000000 +0100
++++ linux-2.6.22.4-squashfs/include/linux/squashfs_fs_sb.h	2007-09-20 19:13:44.000000000 +0200
 @@ -0,0 +1,74 @@
 +#ifndef SQUASHFS_FS_SB
 +#define SQUASHFS_FS_SB
@@ -4115,9 +4128,9 @@ diff -urN linux-2.6.21.1.old/include/linux/squashfs_fs_sb.h linux-2.6.21.1.dev/i
 +	int			(*read_fragment_index_table)(struct super_block *s);
 +};
 +#endif
-diff -urN linux-2.6.21.1.old/init/do_mounts_rd.c linux-2.6.21.1.dev/init/do_mounts_rd.c
---- linux-2.6.21.1.old/init/do_mounts_rd.c	2007-04-27 23:49:26.000000000 +0200
-+++ linux-2.6.21.1.dev/init/do_mounts_rd.c	2007-05-26 19:00:37.144348264 +0200
+diff -urN linux-2.6.22.4/init/do_mounts_rd.c linux-2.6.22.4-squashfs/init/do_mounts_rd.c
+--- linux-2.6.22.4/init/do_mounts_rd.c	2007-08-21 06:33:06.000000000 +0200
++++ linux-2.6.22.4-squashfs/init/do_mounts_rd.c	2007-09-20 19:13:44.000000000 +0200
 @@ -5,6 +5,7 @@
  #include <linux/ext2_fs.h>
  #include <linux/romfs_fs.h>