Hi all, This patchset adds support in e2fsprogs for attaching crc32c checksums to most of the ext4 metadata objects. A full design document is on the ext4 wiki[1]. Please see the cover letter for the kernel patches for a more thorough summary of this work. Please have a look at the design document and patches, and please feel free to suggest any changes. v2: Checksum the MMP block, store the checksum type in the superblock, include the inode generation in file checksums, and finally solve the problem of limited space in block groups by splitting the checksum into two halves. v2.1: Checksum the reserved parts of the htree tail structure. v2.2: Reincorporate the FS UUID in the bitmap checksum calcuations. Move all disk layout changes to the front and the feature flag enablement to the end of the patch set. Fail journal recovery if revoke block fails checksum. v2.3: Change fsck handling of checksum errors: First ask to clear the item; if the user declines, run the regular checks; if no corrective actions result, ask to reset the checksum. Also, precompute the UUID checksum seed, refactor the inode generation patch into respective patches, and clean up structure member declarations. v3: Eliminate the bg_use_meta_csum feature flag and make metadata_csum supersede uninit_bg. Enable metadata_csum by default on ext4dev filesystems. This patchset has been tested on 3.3.0-rc6 on x64 and i386. The patches seems to work fine on both platforms. The patchset is based atop the 1.42.1 release. --D [1] https://ext4.wiki.kernel.org/articles/e/x/t/Ext4_Disk_Layout_aecb.html -- To unsubscribe from this list: send the line "unsubscribe linux-ext4" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
