git: sbin/hammer: Add full mode for hammer recover to revive full scan

[Tomohiro Kusumi]

commit 3d9006655df747a9297e533e784e94fc790b0a29
Author: Tomohiro Kusumi <kusumi.tomohiro at gmail.com>
Date:   Sat Dec 10 15:21:00 2016 +0900

    sbin/hammer: Add full mode for hammer recover to revive full scan
    
    This commit revives the original full scan recovery by adding full
    option, after the previous commit introduced offset limit.
    Apparently, both full option and quick option can't be specified.
    
    To summarize 3 modes,
    
    1. default - Full scan, but only upto the last big-block being used.
    2. full - Full scan, which scans the entire fs image with no limit.
    3. quick - B-Tree only scan, plus associated records in other zones.
    
    1. was introduced (by the previous commit) to fix a bug, as well as
      to avoid irrelevant files.
    2. was introduced (by this commit) to revive the original full scan
      recovery behavior, which is by far the slowest, but most reliable
      in terms of recovery except for the above bug.
    3. was introduced (by e819b271) to speed up the recovery process,
      provided B-Tree zone is not corrupted. This is the fastest.

Summary of changes:
 sbin/hammer/cmd_recover.c | 20 +++++++++++++-------
 sbin/hammer/hammer.8      | 11 +++++++++--
 sbin/hammer/hammer.c      |  2 +-
 3 files changed, 23 insertions(+), 10 deletions(-)

http://gitweb.dragonflybsd.org/dragonfly.git/commitdiff/3d9006655df747a9297e533e784e94fc790b0a29


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