Attachment #160981 for bug #220687

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    __u32 s_rev_level;		/* Revision level */
    __u16 s_def_resuid;		/* Default uid for reserved blocks */
    __u16 s_def_resgid;		/* Default gid for reserved blocks */
    /*
     * 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

#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 */

      gdp = GROUP_DESC;
      ino_blk = gdp[desc].bg_inode_table +
	(((current_ino - 1) % (SUPERBLOCK->s_inodes_per_group))
	 >> log2 (EXT2_INODES_PER_BLOCK (SUPERBLOCK)));
#ifdef E2DEBUG
      printf ("inode table fsblock=%d\n", ino_blk);
#endif /* E2DEBUG */

      /* reset indirect blocks! */
      mapblock2 = mapblock1 = -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_INODES_PER_BLOCK (SUPERBLOCK), EXT2_INODE_SIZE (SUPERBLOCK));
	      sizeof (struct ext2_inode));
      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;

Return to bug 220687

Lines 79-85 Link Here

(-)grub-0.97-800/stage2/fsys_ext2fs.c (-7 / +59 lines)
79	__u32 s_rev_level; /* Revision level */	79	__u32 s_rev_level; /* Revision level */
80	__u16 s_def_resuid; /* Default uid for reserved blocks */	80	__u16 s_def_resuid; /* Default uid for reserved blocks */
81	__u16 s_def_resgid; /* Default gid for reserved blocks */	81	__u16 s_def_resgid; /* Default gid for reserved blocks */
82	__u32 s_reserved[235]; /* Padding to the end of the block */	82	/*
		83	* These fields are for EXT2_DYNAMIC_REV superblocks only.
		84	*
		85	* Note: the difference between the compatible feature set and
		86	* the incompatible feature set is that if there is a bit set
		87	* in the incompatible feature set that the kernel doesn't
		88	* know about, it should refuse to mount the filesystem.
		89	*
		90	* e2fsck's requirements are more strict; if it doesn't know
		91	* about a feature in either the compatible or incompatible
		92	* feature set, it must abort and not try to meddle with
		93	* things it doesn't understand...
		94	*/
		95	__u32 s_first_ino; /* First non-reserved inode */
		96	__u16 s_inode_size; /* size of inode structure */
		97	__u16 s_block_group_nr; /* block group # of this superblock */
		98	__u32 s_feature_compat; /* compatible feature set */
		99	__u32 s_feature_incompat; /* incompatible feature set */
		100	__u32 s_feature_ro_compat; /* readonly-compatible feature set */
		101	__u8 s_uuid[16]; /* 128-bit uuid for volume */
		102	char s_volume_name[16]; /* volume name */
		103	char s_last_mounted[64]; /* directory where last mounted */
		104	__u32 s_algorithm_usage_bitmap; /* For compression */
		105	/*
		106	* Performance hints. Directory preallocation should only
		107	* happen if the EXT2_FEATURE_COMPAT_DIR_PREALLOC flag is on.
		108	*/
		109	__u8 s_prealloc_blocks; /* Nr of blocks to try to preallocate*/
		110	__u8 s_prealloc_dir_blocks; /* Nr to preallocate for dirs */
		111	__u16 s_reserved_gdt_blocks;/* Per group table for online growth */
		112	/*
		113	* Journaling support valid if EXT2_FEATURE_COMPAT_HAS_JOURNAL set.
		114	*/
		115	__u8 s_journal_uuid[16]; /* uuid of journal superblock */
		116	__u32 s_journal_inum; /* inode number of journal file */
		117	__u32 s_journal_dev; /* device number of journal file */
		118	__u32 s_last_orphan; /* start of list of inodes to delete */
		119	__u32 s_hash_seed[4]; /* HTREE hash seed */
		120	__u8 s_def_hash_version; /* Default hash version to use */
		121	__u8 s_jnl_backup_type; /* Default type of journal backup */
		122	__u16 s_reserved_word_pad;
		123	__u32 s_default_mount_opts;
		124	__u32 s_first_meta_bg; /* First metablock group */
		125	__u32 s_mkfs_time; /* When the filesystem was created */
		126	__u32 s_jnl_blocks[17]; /* Backup of the journal inode */
		127	__u32 s_reserved[172]; /* Padding to the end of the block */
83	};	128	};
84		129
85	struct ext2_group_desc	130	struct ext2_group_desc
Lines 218-223 Link Here
218	#define EXT2_ADDR_PER_BLOCK(s) (EXT2_BLOCK_SIZE(s) / sizeof (__u32))	263	#define EXT2_ADDR_PER_BLOCK(s) (EXT2_BLOCK_SIZE(s) / sizeof (__u32))
219	#define EXT2_ADDR_PER_BLOCK_BITS(s) (log2(EXT2_ADDR_PER_BLOCK(s)))	264	#define EXT2_ADDR_PER_BLOCK_BITS(s) (log2(EXT2_ADDR_PER_BLOCK(s)))
220		265
		266	#define EXT2_GOOD_OLD_REV 0 /* The good old (original) format */
		267	#define EXT2_DYNAMIC_REV 1 /* V2 format w/ dynamic inode sizes */
		268	#define EXT2_GOOD_OLD_INODE_SIZE 128
		269	#define EXT2_INODE_SIZE(s) (((s)->s_rev_level == EXT2_GOOD_OLD_REV) ? \
		270	EXT2_GOOD_OLD_INODE_SIZE : \
		271	(s)->s_inode_size)
		272	#define EXT2_INODES_PER_BLOCK(s) (EXT2_BLOCK_SIZE(s)/EXT2_INODE_SIZE(s))
		273
221	/* linux/ext2_fs.h */	274	/* linux/ext2_fs.h */
222	#define EXT2_BLOCK_SIZE_BITS(s) ((s)->s_log_block_size + 10)	275	#define EXT2_BLOCK_SIZE_BITS(s) ((s)->s_log_block_size + 10)
223	/* kind of from ext2/super.c */	276	/* kind of from ext2/super.c */
Lines 553-559 Link Here
553	gdp = GROUP_DESC;	606	gdp = GROUP_DESC;
554	ino_blk = gdp[desc].bg_inode_table +	607	ino_blk = gdp[desc].bg_inode_table +
555	(((current_ino - 1) % (SUPERBLOCK->s_inodes_per_group))	608	(((current_ino - 1) % (SUPERBLOCK->s_inodes_per_group))
556	>> log2 (EXT2_BLOCK_SIZE (SUPERBLOCK) / sizeof (struct ext2_inode)));	609	>> log2 (EXT2_INODES_PER_BLOCK (SUPERBLOCK)));
557	#ifdef E2DEBUG	610	#ifdef E2DEBUG
558	printf ("inode table fsblock=%d\n", ino_blk);	611	printf ("inode table fsblock=%d\n", ino_blk);
559	#endif /* E2DEBUG */	612	#endif /* E2DEBUG */
Lines 565-577 Link Here
565	/* reset indirect blocks! */	618	/* reset indirect blocks! */
566	mapblock2 = mapblock1 = -1;	619	mapblock2 = mapblock1 = -1;
567		620
568	raw_inode = INODE +	621	raw_inode = (struct ext2_inode )((char )INODE +
569	((current_ino - 1)	622	((current_ino - 1) & (EXT2_INODES_PER_BLOCK (SUPERBLOCK) - 1)) *
570	& (EXT2_BLOCK_SIZE (SUPERBLOCK) / sizeof (struct ext2_inode) - 1));	623	EXT2_INODE_SIZE (SUPERBLOCK));
571	#ifdef E2DEBUG	624	#ifdef E2DEBUG
572	printf ("ipb=%d, sizeof(inode)=%d\n",	625	printf ("ipb=%d, sizeof(inode)=%d\n",
573	(EXT2_BLOCK_SIZE (SUPERBLOCK) / sizeof (struct ext2_inode)),	626	EXT2_INODES_PER_BLOCK (SUPERBLOCK), EXT2_INODE_SIZE (SUPERBLOCK));
574	sizeof (struct ext2_inode));
575	printf ("inode=%x, raw_inode=%x\n", INODE, raw_inode);	627	printf ("inode=%x, raw_inode=%x\n", INODE, raw_inode);
576	printf ("offset into inode table block=%d\n", (int) raw_inode - (int) INODE);	628	printf ("offset into inode table block=%d\n", (int) raw_inode - (int) INODE);
577	for (i = (unsigned char ) INODE; i <= (unsigned char ) raw_inode;	629	for (i = (unsigned char ) INODE; i <= (unsigned char ) raw_inode;