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[v4,0/4] e2image -b option to pass superblock number

Message ID 20180525124225.31089-1-artem.blagodarenko@gmail.com
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Series e2image -b option to pass superblock number | expand

Message

Artem Blagodarenko May 25, 2018, 12:42 p.m. UTC 
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