[PATCH v8 0/8] erofs-utils: mkfs: introduce rebuild mode

[Jingbo Xu]

v8:
- patch 7: fix the missing call for erofs_mkfs_dump_blobs() in rebuild
  mode by also calling erofs_mkfs_dump_blobs() when sbi->extra_devices
  is not zero; otherwise the content of the on-disk device slot is all 0
- patch 8: strip overlay.opaque xattr when --ovlfs-strip=1; update the
  commit message accordingly

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/
v3: https://lore.kernel.org/all/20230822092457.114686-1-jefflexu@linux.alibaba.com/
v4: https://lore.kernel.org/all/20230823071517.12303-1-jefflexu@linux.alibaba.com/
v5: https://lore.kernel.org/all/20230901094706.27539-1-jefflexu@linux.alibaba.com/
v6: https://lore.kernel.org/all/20230905100227.1072-1-jefflexu@linux.alibaba.com/
v7: https://lore.kernel.org/all/20230909163240.42057-2-hsiangkao@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 layer0.erofs ... layerN.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 layer0.erofs ... layerN.erofs


Jingbo Xu (8):
  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_get_dentry() helper
  erofs-utils: lib: add erofs_rebuild_load_tree() helper
  erofs-utils: mkfs: introduce rebuild mode
  erofs-utils: mkfs: add `--ovlfs-strip` option

 include/erofs/blobchunk.h |   2 +
 include/erofs/config.h    |   1 +
 include/erofs/inode.h     |   5 +-
 include/erofs/internal.h  |   7 +-
 include/erofs/list.h      |  20 ++
 include/erofs/rebuild.h   |  21 ++
 include/erofs/xattr.h     |   2 +
 lib/Makefile.am           |   3 +-
 lib/blobchunk.c           |   2 +-
 lib/inode.c               |  31 ++-
 lib/rebuild.c             | 404 ++++++++++++++++++++++++++++++++++++++
 lib/tar.c                 | 109 +---------
 lib/xattr.c               |  87 ++++++++
 mkfs/main.c               | 227 ++++++++++++++++-----
 14 files changed, 751 insertions(+), 170 deletions(-)
 create mode 100644 include/erofs/rebuild.h
 create mode 100644 lib/rebuild.c

-- 
2.19.1.6.gb485710b