Hi there.
When updating to e2fsprogs-1.40.6 like LFS devel did, I noticed my
system(s) no longer booting via grub. Slightly inconvenient ;-)
After digging around a while I found that mke2fs has changed the inode
size to 256, making grub effectively unable to read the filesystem to
find it's directory, the kernel etc.
I dug around in the net for a while and found a patch
(
http://people.debian.org/~terpstra/message/20080130.140155.866d3ad1.en.html
)
but the formatting on a html-page always leaves a bit to be desired.
I attach the version we use her for review, eventually it can be of use
for LFS devel.
Warmest greetings, keep up the good work,
drifter
--
[EMAIL PROTECTED]
23.....56.......drifting
By caffeine alone I set my mind in motion, By the beans of Java
do thoughts acquire speed, hands acquire shaking, the shaking
becomes a warning, By caffeine alone do I set my mind in motion
--- stage2/fsys_ext2fs.c.unchanged 2008-02-22 15:45:07.000000000 +0100
+++ stage2/fsys_ext2fs.c 2008-02-22 15:46:25.000000000 +0100
@@ -79,7 +79,52 @@
__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 +263,10 @@
#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 +602,7 @@
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 +614,14 @@
/* 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;
--
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