| Message ID | 20111008075509.20506.61977.stgit@elm3c44.beaverton.ibm.com |
|---|---|
| State | Superseded, archived |
| Headers | show |
diff --git a/fs/ext4/bitmap.c b/fs/ext4/bitmap.c index fa3af81..43d9173 100644 --- a/fs/ext4/bitmap.c +++ b/fs/ext4/bitmap.c @@ -29,3 +29,15 @@ unsigned int ext4_count_free(struct buffer_head *map, unsigned int numchars) #endif /* EXT4FS_DEBUG */ +static __u32 ext4_bitmap_csum(struct super_block *sb, ext4_group_t group, + struct buffer_head *bh, int sz) +{ + __u32 crc; + struct ext4_sb_info *sbi = EXT4_SB(sb); + + group = cpu_to_le32(group); + crc = ext4_chksum(sbi, sbi->s_uuid_crc, (__u8 *)&group, sizeof(group)); + crc = ext4_chksum(sbi, crc, (__u8 *)bh->b_data, sz); + + return crc; +}
These helper functions will be used to calculate and verify the block and inode bitmap checksums. Signed-off-by: Darrick J. Wong <djwong@us.ibm.com> --- fs/ext4/bitmap.c | 12 ++++++++++++ 1 files changed, 12 insertions(+), 0 deletions(-) -- To unsubscribe from this list: send the line "unsubscribe linux-ext4" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html