This patch set introduces two new features for scrub. They share the backref iteration code which is the reason they made it into the same patch set.
The first feature adds printk statements in case scrub finds an error which list all affected files. You will need patch 1, 2 and 3 for that. The second feature adds the trigger which enables us to correct i/o errors in case the affected extent does not have a checksum (nodatasum), eventually. You will need patch 1, 4, 5 and 6 for that. I tried to apply all patches to the current cmason/for-linus branch and to Arne's current for-chris branch. They do apply with no errors (some offsets possible). Please review. Next I'm starting to make up my mind how to implement on-the-fly error correction correctly. This will enable us to rewrite good data whenever we encounter a bad copy. I have some preliminary patches already, the stress in the first sentence is on "correctly". The second feature mentioned in this patch series will then automatically use that code, too. Changelog v1->v2: - Various cleanup, sensible error codes as suggested by David Sterba -Jan Jan Schmidt (7): added helper functions to iterate backrefs scrub: added unverified_errors scrub: print paths of corrupted files scrub: bugfix: mirror_num off by one add mirror_num to extent_read_full_page scrub: use int for mirror_num, not u64 scrub: add fixup code for errors on nodatasum files fs/btrfs/Makefile | 3 +- fs/btrfs/backref.c | 445 ++++++++++++++++++++++++++++++++++++++++++++++++++ fs/btrfs/backref.h | 59 +++++++ fs/btrfs/disk-io.c | 2 +- fs/btrfs/extent_io.c | 6 +- fs/btrfs/extent_io.h | 3 +- fs/btrfs/inode.c | 2 +- fs/btrfs/scrub.c | 384 +++++++++++++++++++++++++++++++++++++++---- 8 files changed, 865 insertions(+), 39 deletions(-) create mode 100644 fs/btrfs/backref.c create mode 100644 fs/btrfs/backref.h -- 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
