Patch from Red Hat. See #463236, #463123 (and #491076 for the reviewed version) diff -ur grub-0.97/stage2/fsys_ext2fs.c grub-0.97.new/stage2/fsys_ext2fs.c --- grub-0.97/stage2/fsys_ext2fs.c 2008-07-23 01:18:18.000000000 +0200 +++ grub-0.97.new/stage2/fsys_ext2fs.c 2008-07-25 14:33:29.000000000 +0200 @@ -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 +263,14 @@ #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_GOOD_OLD_REV 0 /* The good old (original) format */ +#define EXT2_DYNAMIC_REV 1 /* V2 format w/ dynamic inode sizes */ +#define EXT2_GOOD_OLD_INODE_SIZE 128 +#define EXT2_INODE_SIZE(s) (((s)->s_rev_level == EXT2_GOOD_OLD_REV) ? \ + EXT2_GOOD_OLD_INODE_SIZE : \ + (s)->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 +606,7 @@ 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 +618,12 @@ /* 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;