There was a discussion about possibility of using superblock backup for creating images with e2image. https://www.spinics.net/lists/linux-ext4/msg30583.html Now our customer faced with situation then it would be useful to have image file from partition with broken superblock. Here is set of patches that adds this functionality. This is 7th version of the patch set. Changes from previous version: * Only two cases in try_open_fs() now: with and without passed superblock size. * Some minor code style and comments issues are fixed. Artem Blagodarenko (4): ext2fs: opening filesystem code refactoring e2image: add -b and -B options to use supperblock backup tests: add test for e2image -b option ext2fs: automaticlly open backup superblocks e2fsck/e2fsck.h | 2 - e2fsck/message.c | 3 +- e2fsck/unix.c | 42 ++++--------- e2fsck/util.c | 73 ----------------------- lib/ext2fs/openfs.c | 39 ++++++++++-- lib/support/Makefile.in | 8 ++- lib/support/sb_backup.c | 140 ++++++++++++++++++++++++++++++++++++++++++++ lib/support/sb_backup.h | 20 +++++++ misc/dumpe2fs.c | 17 +----- misc/e2image.8.in | 33 +++++++++++ misc/e2image.c | 50 ++++++++++++++-- tests/i_zero_super/expect.1 | 22 +++++++ tests/i_zero_super/image.gz | Bin 0 -> 13262 bytes tests/i_zero_super/script | 11 ++++ 14 files changed, 328 insertions(+), 132 deletions(-) create mode 100644 lib/support/sb_backup.c create mode 100644 lib/support/sb_backup.h create mode 100644 tests/i_zero_super/expect.1 create mode 100644 tests/i_zero_super/image.gz create mode 100644 tests/i_zero_super/script -- 2.14.3
