Miklos, This is the 2nd revision of the prep patch series for NFS export. I am posing the prep patches only to overlayfs list and will post NFS export implementation to fsdevel. In the 1st revision the mount option 'index=all' was used to request a full index. This revision re-brands the feature as 'verify=on', including a config/module option and documentation that explains the benefits of full index (i.e. avoid multiple redirect). The prep series goes on a bit beyond implementation of 'verify=on'. Patches 17-23 create the whiteout index entries and make some more changes that are prerequisites for NFS export implementation. To sanity test full index, I have implemented _overlay_check_fs() helper for xfstests [3], 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. There is also a new test to verify multiple redirect dir is detected on lookup. The series is based on top of my ovl-fixes [1] branch, which includes some patches I had already posted. The complete NFS export work is available here [2]. Amir. [1] https://github.com/amir73il/linux/commits/ovl-fixes [2] https://github.com/amir73il/linux/commits/ovl-nfs-export-v2 [3] https://github.com/amir73il/xfstests/commits/ovl-index-all Amir Goldstein (23): ovl: disable index when no xattr support ovl: ignore index mount option when no upper layer ovl: store layer index in ovl_layer ovl: factor out ovl_check_origin_fh() ovl: pass ovl_layer array to ovl_check_origin_fh() ovl: add support for "verify" feature ovl: verify stored origin fh matches lower dir ovl: unbless lower st_ino of files under unverified redirected dir ovl: lookup index for directories ovl: verify whiteout index entries on mount ovl: verify directory index entries on mount ovl: cleanup temp index entries ovl: create ovl_need_index() helper ovl: index all files on copy up with 'verify=on' ovl: index directories on copy up with 'verify=on' 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: factor out ovl_get_index_fh() helper ovl: do not pass overlay dentry to ovl_get_inode() ovl: grab i_count reference of lower inode ovl: use d_splice_alias() in place of d_add() in lookup ovl: copy up of disconnected dentries Documentation/filesystems/overlayfs.txt | 16 ++ fs/dcache.c | 1 + fs/overlayfs/Kconfig | 18 ++ fs/overlayfs/copy_up.c | 179 ++++++++++--- fs/overlayfs/dir.c | 58 +++-- fs/overlayfs/inode.c | 38 ++- fs/overlayfs/namei.c | 442 +++++++++++++++++++++++--------- fs/overlayfs/overlayfs.h | 29 ++- fs/overlayfs/ovl_entry.h | 3 + fs/overlayfs/readdir.c | 37 ++- fs/overlayfs/super.c | 74 ++++-- fs/overlayfs/util.c | 94 +++++-- 12 files changed, 752 insertions(+), 237 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
