grub 0.97 : add support fo 256 bytes inodes

Recent mkfs.ext[2|3|4] create filesystems with 256 bytes inodes
So if you boot a system with a recent e2fsprogs,
 install an openembedded based distribution like angstrom from it,
 and then try to boot the openembedded-based distribution: it won't
 work (grub wouldn't be able to read files from the disk)

The patch came from:
http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=%23463236

2 files changed, 96 insertions, 1 deletions

diff --git a/recipes/grub/grub-0.97/grub-support-256byte-inode.diff b/recipes/grub/grub-0.97/grub-support-256byte-inode.diff
new file mode 100644
index 0000000000..bef3bc18e7
--- /dev/null
+++ b/recipes/grub/grub-0.97/grub-support-256byte-inode.diff
@@ -0,0 +1,94 @@
+diff -Nrup a/stage2/fsys_ext2fs.c b/stage2/fsys_ext2fs.c
+--- a/stage2/fsys_ext2fs.c	2004-08-08 20:19:18.000000000 +0200
++++ b/stage2/fsys_ext2fs.c	2008-01-30 14:27:20.000000000 +0100
+@@ -79,7 +79,52 @@ struct ext2_super_block
+     __u32 s_rev_level;		/* Revision level */
+     __u16 s_def_resuid;		/* Default uid for reserved blocks */
+     __u16 s_def_resgid;		/* Default gid for reserved blocks */
+-    __u32 s_reserved[235];	/* Padding to the end of the block */
++    /*
++     * These fields are for EXT2_DYNAMIC_REV superblocks only.
++     *
++     * Note: the difference between the compatible feature set and
++     * the incompatible feature set is that if there is a bit set
++     * in the incompatible feature set that the kernel doesn't
++     * know about, it should refuse to mount the filesystem.
++     *
++     * e2fsck's requirements are more strict; if it doesn't know
++     * about a feature in either the compatible or incompatible
++     * feature set, it must abort and not try to meddle with
++     * things it doesn't understand...
++     */
++    __u32 s_first_ino;		/* First non-reserved inode */
++    __u16 s_inode_size;		/* size of inode structure */
++    __u16 s_block_group_nr;	/* block group # of this superblock */
++    __u32 s_feature_compat;	/* compatible feature set */
++    __u32 s_feature_incompat;	/* incompatible feature set */
++    __u32 s_feature_ro_compat;	/* readonly-compatible feature set */
++    __u8  s_uuid[16];		/* 128-bit uuid for volume */
++    char  s_volume_name[16];	/* volume name */
++    char  s_last_mounted[64];	/* directory where last mounted */
++    __u32 s_algorithm_usage_bitmap; /* For compression */
++    /*
++     * Performance hints.  Directory preallocation should only
++     * happen if the EXT2_FEATURE_COMPAT_DIR_PREALLOC flag is on.
++     */
++    __u8  s_prealloc_blocks;	/* Nr of blocks to try to preallocate*/
++    __u8  s_prealloc_dir_blocks;	/* Nr to preallocate for dirs */
++    __u16 s_reserved_gdt_blocks;/* Per group table for online growth */
++    /*
++     * Journaling support valid if EXT2_FEATURE_COMPAT_HAS_JOURNAL set.
++     */
++    __u8 s_journal_uuid[16];	/* uuid of journal superblock */
++    __u32 s_journal_inum;	/* inode number of journal file */
++    __u32 s_journal_dev;	/* device number of journal file */
++    __u32 s_last_orphan;	/* start of list of inodes to delete */
++    __u32 s_hash_seed[4];	/* HTREE hash seed */
++    __u8  s_def_hash_version;	/* Default hash version to use */
++    __u8  s_jnl_backup_type; 	/* Default type of journal backup */
++    __u16 s_reserved_word_pad;
++    __u32 s_default_mount_opts;
++    __u32 s_first_meta_bg;	/* First metablock group */
++    __u32 s_mkfs_time;		/* When the filesystem was created */
++    __u32 s_jnl_blocks[17]; 	/* Backup of the journal inode */
++    __u32 s_reserved[172];	/* Padding to the end of the block */
+   };
+ 
+ struct ext2_group_desc
+@@ -218,6 +263,9 @@ struct ext2_dir_entry
+ #define EXT2_ADDR_PER_BLOCK(s)          (EXT2_BLOCK_SIZE(s) / sizeof (__u32))
+ #define EXT2_ADDR_PER_BLOCK_BITS(s)		(log2(EXT2_ADDR_PER_BLOCK(s)))
+ 
++#define EXT2_INODE_SIZE(s)		(SUPERBLOCK->s_inode_size)
++#define EXT2_INODES_PER_BLOCK(s)	(EXT2_BLOCK_SIZE(s)/EXT2_INODE_SIZE(s))
++
+ /* linux/ext2_fs.h */
+ #define EXT2_BLOCK_SIZE_BITS(s)        ((s)->s_log_block_size + 10)
+ /* kind of from ext2/super.c */
+@@ -553,7 +601,7 @@ ext2fs_dir (char *dirname)
+       gdp = GROUP_DESC;
+       ino_blk = gdp[desc].bg_inode_table +
+ 	(((current_ino - 1) % (SUPERBLOCK->s_inodes_per_group))
+-	 >> log2 (EXT2_BLOCK_SIZE (SUPERBLOCK) / sizeof (struct ext2_inode)));
++	 >> log2 (EXT2_INODES_PER_BLOCK (SUPERBLOCK)));
+ #ifdef E2DEBUG
+       printf ("inode table fsblock=%d\n", ino_blk);
+ #endif /* E2DEBUG */
+@@ -565,13 +613,12 @@ ext2fs_dir (char *dirname)
+       /* reset indirect blocks! */
+       mapblock2 = mapblock1 = -1;
+ 
+-      raw_inode = INODE +
+-	((current_ino - 1)
+-	 & (EXT2_BLOCK_SIZE (SUPERBLOCK) / sizeof (struct ext2_inode) - 1));
++      raw_inode = (struct ext2_inode *)((char *)INODE +
++	((current_ino - 1) & (EXT2_INODES_PER_BLOCK (SUPERBLOCK) - 1)) *
++	EXT2_INODE_SIZE (SUPERBLOCK));
+ #ifdef E2DEBUG
+       printf ("ipb=%d, sizeof(inode)=%d\n",
+-	      (EXT2_BLOCK_SIZE (SUPERBLOCK) / sizeof (struct ext2_inode)),
+-	      sizeof (struct ext2_inode));
++	      EXT2_INODES_PER_BLOCK (SUPERBLOCK), EXT2_INODE_SIZE (SUPERBLOCK));
+       printf ("inode=%x, raw_inode=%x\n", INODE, raw_inode);
+       printf ("offset into inode table block=%d\n", (int) raw_inode - (int) INODE);
+       for (i = (unsigned char *) INODE; i <= (unsigned char *) raw_inode;
diff --git a/recipes/grub/grub_0.97.bb b/recipes/grub/grub_0.97.bb
index 40adff9ee9..0d64ed76df 100644
--- a/recipes/grub/grub_0.97.bb
+++ b/recipes/grub/grub_0.97.bb
@@ -3,10 +3,11 @@ HOMEPAGE = "http://www.gnu.org/software/grub"
 SECTION = "bootloaders"
 PRIORITY = "optional"
 RDEPENDS_${PN}-install = "diffutils"
-PR = "r5"
+PR = "r6"
 
 SRC_URI = "ftp://alpha.gnu.org/gnu/grub/grub-${PV}.tar.gz \
            file://automake-1.10.patch;patch=1 \
+           file://grub-support-256byte-inode.diff;patch=1 \
            file://menu.lst"
 
 inherit autotools