This series adds an initial implementation for scrub. It works quite straightforward. The usermode issues an ioctl for each device in the fs. For each device, it enumerates the allocated device chunks. For each chunk, the contained extents are enumerated and the data checksums fetched. The extents are read sequentially and the checksums verified. If an error occurs (checksum or EIO), a good copy is searched for. If one is found, the bad copy will be rewritten. All enumerations happen from the commit roots. During a transaction commit, the scrubs get paused and afterwards continue from the new roots. For future improvements please see the inline comments.
The accompanying user mode patches will follow shortly. Thanks, Arne Arne Jansen (5): Jan Schmidt (1): btrfs: add parameter to btrfs_lookup_csum_range btrfs: make struct map_lookup public btrfs: add state information for scrub btrfs: add scrub code and prototypes btrfs: sync scrub with commit & device removal btrfs: new ioctls for scrub fs/btrfs/Makefile | 2 +- fs/btrfs/ctree.h | 44 ++- fs/btrfs/disk-io.c | 16 + fs/btrfs/file-item.c | 8 +- fs/btrfs/inode.c | 2 +- fs/btrfs/ioctl.c | 85 +++ fs/btrfs/ioctl.h | 36 ++ fs/btrfs/relocation.c | 2 +- fs/btrfs/scrub.c | 1462 ++++++++++++++++++++++++++++++++++++++++++++++++ fs/btrfs/transaction.c | 3 + fs/btrfs/tree-log.c | 6 +- fs/btrfs/volumes.c | 16 +- fs/btrfs/volumes.h | 17 + 13 files changed, 1677 insertions(+), 22 deletions(-) create mode 100644 fs/btrfs/scrub.c -- 1.7.3.4 -- 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
