git: usr.sbin/makefs: Add HAMMER2 offline read / VOP_READ support

[Tomohiro Kusumi]

commit fc4148fe6433963760fb77515a762ce076e70282
Author: Tomohiro Kusumi <tkusumi at netbsd.org>
Date:   Fri Jun 23 23:45:51 2023 -0700

    usr.sbin/makefs: Add HAMMER2 offline read / VOP_READ support
    
    The offline read takes HAMMER2 specific "-o R" option.
    `image-file` argument is a valid HAMMER2 image file or block device.
    Unlike other offline commands, `directory` must be a valid directory.
    
    e.g.
    $ makefs -t hammer2 -o R=/path/to/file /dev/adx /a/b/c
    $ makefs -t hammer2 -o R=/path/to/file /path/to/hammer2.img /a/b/c
    
    The "-o R" option requires file path argument. The file is retrieved
    from `image-file` and written to a file under `directory`.
    In the examples above, /path/to/file is retrieved as /a/b/c/file
    on success.

Summary of changes:
 usr.sbin/makefs/hammer2.c               | 114 ++++++++++++++++++++++++++++++++
 usr.sbin/makefs/hammer2.h               |   6 ++
 usr.sbin/makefs/hammer2/hammer2.h       |   1 +
 usr.sbin/makefs/hammer2/hammer2_vnops.c |  33 ++++++++-
 usr.sbin/makefs/makefs.8                |  12 +++-
 5 files changed, 161 insertions(+), 5 deletions(-)

http://gitweb.dragonflybsd.org/dragonfly.git/commitdiff/fc4148fe6433963760fb77515a762ce076e70282


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