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 4th version of the patch set. Changes since v3: * superblock backup reading functions are moved away from lib/ext2fs to lib/support Artem Blagodarenko (4): ext2fs: opening filesystem code refactoring e2image: add -b option 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 | 44 +++++--------- e2fsck/util.c | 73 ----------------------- lib/ext2fs/openfs.c | 36 +++++++++++- lib/support/Makefile.in | 8 ++- lib/support/sb_backup.c | 137 ++++++++++++++++++++++++++++++++++++++++++++ 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(+), 128 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
