git: HAMMER - Add version 3 meta-data features
commit 83f2a3aae851887c1143dd5174eade5b66682dce
Author: Matthew Dillon <dillon@apollo.backplane.com>
Date: Wed Oct 14 11:44:59 2009 -0700
HAMMER - Add version 3 meta-data features
* These features are available for filesystem version 3. Version 2 may be upgraded
to version 3 in-place. These features are not usable until you upgrade.
* Definitively store snapshots in filesystem meta-data. Softlinks still
work. The new snapshot directives (snap, snaplo, snapq, etc) also allow
you to specify up to a 64-character note for each snapshot you create.
The snapls directive may be used to list all snapshots stored in meta-data.
'hammer cleanup' will move all softlink-based snapshots residing in the
<fs>/snapshots directory to meta-data when it next snapshots the filesystem
(within a day of upgrading, usually). The snapshot softlinks are left intact.
Storing snapshot information in meta-data means that accidental wipes of
your <fs>/snapshots directory will NOT cause later hammer cleanup runs to
destroy your snapshots! The meta-data snapshots are also removed if you
do a prune-everything, or through normal pruning expirations, and thus
'hammer snapls' will definitively list your valid snapshots.
This feature also means that you can obtain a definitive list of snapshots
available on mirroring slaves.
* Definitively store the hammer cleanup configuration file in filesystem meta-data.
This meta-data is not mirrored. 'hammer cleanup' will move <fs>/snapshots/config
to the new meta-data config and deletes <fs>/snapshots/config after you've upgraded
the filesystem. You can edit the configuration with the 'viconfig' directive.
* The HAMMER utility has new directives: snap, snaplo, snapq, snaprm, snapls,
config, and viconfig.
* WARNING! Filesystems mounted 'nohistory' and files chflagged similarly do not
have snapshots, but the hammer utility still allows the directives to be run.
This is a bug that needs to be fixed.
Summary of changes:
sbin/hammer/Makefile | 3 +-
sbin/hammer/cmd_cleanup.c | 412 ++++++++++++++++++++++++++++++-----
sbin/hammer/cmd_config.c | 230 +++++++++++++++++++
sbin/hammer/cmd_snapshot.c | 388 ++++++++++++++++++++++++++++++++-
sbin/hammer/cmd_softprune.c | 152 +++++++++++--
sbin/hammer/cmd_version.c | 19 ++-
sbin/hammer/hammer.8 | 53 +++++
sbin/hammer/hammer.c | 43 ++++
sbin/hammer/hammer.h | 5 +
sys/vfs/hammer/hammer.h | 9 +-
sys/vfs/hammer/hammer_disk.h | 38 +++-
sys/vfs/hammer/hammer_ioctl.c | 374 +++++++++++++++++++++++++++++++-
sys/vfs/hammer/hammer_ioctl.h | 50 ++++-
sys/vfs/hammer/hammer_mirror.c | 64 +++++-
sys/vfs/hammer/hammer_object.c | 187 ++++++++++++++++-
sys/vfs/hammer/hammer_ondisk.c | 2 +
sys/vfs/hammer/hammer_reblock.c | 4 +-
sys/vfs/hammer/hammer_transaction.c | 9 +-
sys/vfs/hammer/hammer_vfsops.c | 1 +
19 files changed, 1940 insertions(+), 103 deletions(-)
create mode 100644 sbin/hammer/cmd_config.c
http://gitweb.dragonflybsd.org/dragonfly.git/commitdiff/83f2a3aae851887c1143dd5174eade5b66682dce
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