Miklos, This is the second of two prep patch sets [1][2] for NFS export [3]. NFS export is enabled with the 'verify_dir' and 'index=all' mount options. The requirement for 'index=all' can be relaxed if we create index for redirected dirs on lookup and for renamed non-dirs when encoding file handles. Decoding file handle will be more complex without index=all, so per your suggestion, this was not implemented for first version of NFS export. The first two patches in this series are tagged for stable v4.13. The first patch I already posted, relaxes some index lookup constrains that we can do without. The second patch allows kernel v4.13 to mount an overlay with whiteout index entries, which are being introduced by this patch set. To sanity test index=all, I have implemented _overlay_check_fs() helper for xfstests [4], which is a very basic "fsck" of the index dir. This helper is called at the end of each overlay xfstest to verify the sanity of the index entries. Amir. [1] https://github.com/amir73il/linux/commits/ovl-verify-dir [2] https://github.com/amir73il/linux/commits/ovl-index-all [3] https://github.com/amir73il/linux/commits/ovl-nfs-export [4] https://github.com/amir73il/xfstests/commits/ovl-index-all Amir Goldstein (11): ovl: fix EIO from lookup of non-indexed upper ovl: verify whiteout index entries on mount ovl: create ovl_need_index() helper ovl: add support for mount option index=all ovl: lookup index for directories ovl: verify directory index entries on mount ovl: index directories on copy up ovl: cleanup dir index when dir nlink drops to zero ovl: whiteout index when union nlink drops to zero ovl: whiteout orphan index entries on mount ovl: cleanup stale whiteout index entries on mount fs/overlayfs/copy_up.c | 130 +++++++++++++++++--- fs/overlayfs/dir.c | 58 +++++---- fs/overlayfs/inode.c | 20 ++- fs/overlayfs/namei.c | 314 +++++++++++++++++++++++++++++++++-------------- fs/overlayfs/overlayfs.h | 29 ++++- fs/overlayfs/ovl_entry.h | 2 +- fs/overlayfs/readdir.c | 48 ++++++-- fs/overlayfs/super.c | 28 +++-- fs/overlayfs/util.c | 55 ++++++--- 9 files changed, 505 insertions(+), 179 deletions(-) -- 2.7.4 -- To unsubscribe from this list: send the line "unsubscribe linux-unionfs" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
