Miklos, This is the first 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 'verify_dir' can be relaxed if we attach generation numbers to index entries as you suggested, but this was not implemented for first version of NFS export. The first two patches in this series, one from zhangyi and one from me are not directly related to 'verify_dir', but they make sense in this context, because 'verify_dir' may refuse to follow to lower dir and leave a pure upper dir with ORIGIN and whiteouts. These two patches have been around for a while and already have a merged xfstest to verify them (overlay/031). The last two patches add the actual verification of lower dir. They have been on my development branch for a few cycles already and the feature is being exercised with snapshots test. [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 Amir Goldstein (7): ovl: fix rmdir problem on origin dir ovl: no direct iteration for dir with copy up origin ovl: remove unneeded arg from ovl_verify_origin() ovl: disable redirect_dir and index when no xattr support ovl: ignore redirect_dir and index when no upper layer ovl: add support for verify_dir mount option ovl: follow decoded origin file handle of merge dir Documentation/filesystems/overlayfs.txt | 20 ++++++++++ fs/dcache.c | 1 + fs/overlayfs/dir.c | 21 +++++++--- fs/overlayfs/namei.c | 60 +++++++++++++++++++++++++---- fs/overlayfs/overlayfs.h | 8 ++-- fs/overlayfs/ovl_entry.h | 1 + fs/overlayfs/readdir.c | 59 ++++++++++++++++++++++------ fs/overlayfs/super.c | 68 +++++++++++++++++++++++---------- fs/overlayfs/util.c | 20 ++++++++++ 9 files changed, 209 insertions(+), 49 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
