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ext2fs: Update Block Group Descriptor struct.

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Uncover some, previously reserved, fields that are used by Ext4.
These are currently unused but it is good to have them for future
reference.

Reviewed by:	bde
MFC after:	3 days
This commit is contained in:
Pedro F. Giffuni 2013-06-03 18:52:14 +00:00
parent 1783063f18
commit 4f69a09308
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=251336
1 changed files with 7 additions and 3 deletions
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10
sys/fs/ext2fs/ext2fs.h
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@ -281,9 +281,13 @@ struct ext2_gd {
uint32_t ext2bgd_i_tables; /* inodes table block */
uint16_t ext2bgd_nbfree; /* number of free blocks */
uint16_t ext2bgd_nifree; /* number of free inodes */
uint16_t ext2bgd_ndirs; /* number of directories */
uint16_t reserved;
uint32_t reserved2[3];
uint16_t ext2bgd_ndirs; /* number of directories */
uint16_t ext2bgd_flags; /* block group flags */
uint32_t ext2bgd_x_bitmap; /* snapshot exclusion bitmap loc. */
uint16_t ext2bgd_b_bmap_csum; /* block bitmap checksum */
uint16_t ext2bgd_i_bmap_csum; /* inode bitmap checksum */
uint16_t ext2bgd_i_unused; /* unused inode count */
uint16_t ext2bgd_csum; /* group descriptor checksum */
};
/* cluster summary information */