[PATCH v3 00/11] erofs-utils: mkfs: introduce rebuild mode

[Jingbo Xu]

v3:
- the original v2 patch [1] is split into patch 1 and 2
- patch 3 is new fix
- patch 6: trusted.overlay.opaque xattr won't be stripped in the mrged
  view
- patch 8: whiteout is droped only when the object (file or directory)
  this whiteout tends to hide indeed appears in a merged view; this is
  implemented with the help of a newly introduced inode->drop flag

[1] https://lore.kernel.org/all/20230816021347.126886-5-jefflexu@linux.alibaba.com/
[2] https://lore.kernel.org/all/20230816021347.126886-8-jefflexu@linux.alibaba.com/

v1: https://lore.kernel.org/all/20230814034239.54660-1-jefflexu@linux.alibaba.com/
v2: https://lore.kernel.org/all/20230816021347.126886-1-jefflexu@linux.alibaba.com/

-------------------------

Introduce a new rebuild mode merging multiple erofs images generated
from either tarerfs index mode (--tar=i):

	mkfs.erofs --tar=i --aufs layer0.erofs layer0.tar
	...
	mkfs.erofs --tar=i --aufs layerN.erofs layerN.tar

	mkfs.erofs merge.erofs layerN.erofs ... layer0.erofs

or tarerofs non-index mode (--tar=f):

	mkfs.erofs --tar=f -Enoinline_data --aufs layer0.erofs layer0.tar
	...
	mkfs.erofs --tar=f -Enoinline_data --aufs layerN.erofs layerN.tar

	mkfs.erofs merge.erofs layerN.erofs ... layer0.erofs


Jingbo Xu (11):
  erofs-utils: lib: fix erofs_init_devices
  erofs-utils: lib: scan devtable if extra_devices is not specified
  erofs-utils: lib: fix dirent type of whiteout in tarerofs
  erofs-utils: lib: add list_splice_tail() helper
  erofs-utils: lib: make erofs_get_unhashed_chunk() global
  erofs-utils: lib: add erofs_read_xattrs_from_disk() helper
  erofs-utils: lib: add erofs_insert_ihash() helper
  erofs-utils: lib: add erofs_rebuild_dump_tree() helper
  erofs-utils: lib: add erofs_rebuild_get_dentry() helper
  erofs-utils: lib: add erofs_rebuild_load_tree() helper
  erofs-utils: mkfs: introduce rebuild mode

 include/erofs/blobchunk.h |   2 +
 include/erofs/inode.h     |   5 +-
 include/erofs/internal.h  |   7 +
 include/erofs/list.h      |  20 ++
 include/erofs/rebuild.h   |  21 ++
 include/erofs/xattr.h     |  33 +---
 lib/Makefile.am           |   3 +-
 lib/blobchunk.c           |   2 +-
 lib/inode.c               |  25 ++-
 lib/rebuild.c             | 395 ++++++++++++++++++++++++++++++++++++++
 lib/super.c               |   9 +-
 lib/tar.c                 | 119 +-----------
 lib/xattr.c               | 112 +++++++++++
 mkfs/main.c               | 199 +++++++++++++++----
 14 files changed, 752 insertions(+), 200 deletions(-)
 create mode 100644 include/erofs/rebuild.h
 create mode 100644 lib/rebuild.c

-- 
2.19.1.6.gb485710b