On Fri, May 11, 2018 at 01:35:24PM +0800, Qu Wenruo wrote: > This patchset can be fetched from github: > https://github.com/adam900710/linux/tree/write_time_sb_check > > We have 2 reports about corrupted btrfs super block, which has some garbage > in its super block, but otherwise it's completely fine and its csum even > matches. > > This means we develop memory corruption during btrfs mount time. > It's not clear whether it's caused by btrfs or some other kernel module, > but at least let's do write time verification to catch such corruption > early. > > Current design is to do 2 different checks at mount time and super write > time. > And for write time check, it only checks the template super block > (fs_info->super_to_commit) other than each super blocks to be written to > disk, mostly to avoid duplicated checks. > > Changelog: > v2: > Rename btrfs_check_super_valid() to btrfs_validate_super() suggested > by Nikolay and David. > v3: > Add a new patch to move btrfs_check_super_valid() to avoid forward > declaration. > Refactor btrfs_check_super_valid() to provide better naming and > function reusablity. > Code style and comment update. > Use 2 different functions, btrfs_validate_mount_super() and > btrfs_validate_write_super(), for mount and write time super check.
Added as topic branch to next, I'm still targeting 4.18 with this patchset so it'll end up in misc-next after some testing. Thanks. -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
