restorevol

NAME

restorevol - Restore a volume from vos dump to the local file system

SYNOPSIS

restorevol [-file <dump file>] [-dir < restore dir> ]
[ -extension <name extension>]
[ -mountpoint <mount point root>]
[ -umask <mode mask>] [-help]

DESCRIPTION

restorevol takes an AFS volume in the format produced by vos dump and restores it to the local file system. Normally, the contents of a volume are maintained by the AFS File Server in an opaque format and copying a volume's raw data does not make it easily accessible. This utility will produce a directory tree that is equivalent to that seen via an AFS client, but without preserving the AFS-specific Access Control Lists (ACLs). It's primary use is to recover data from a volume dump or backup and make it available via a filesystem other than AFS. The dump output will read from standard input, or from a file if -file is specified. The restore process is as follows:

1.

The dump file will be restored within the current directory or that specified with -dir.

2.

Within this directory, a subdir is created. It's name is the RW volume name that was dumped. An extension can be appended to this directory name with -extension.

3.

All mountpoints will appear as symbolic links to the volume name. The path name to the volume will be either that in -mountpoint, or -dir. Symbolic links remain untouched.

4.

You can change your umask during the restore with -umask. Otherwise, restorevol uses your current umask. Mode bits for directories are 0777 (then AND'ed with the umask). Mode bits for files are the owner mode bits duplicated accross group and user (then AND'ed with the umask).

5.

For restores of full dumps, if a directory says it has a file and the file is not found, then a symbolic link AFSFile-<#> will appear in that restored tree. Restores of incremental dumps remove all these files at the end (expensive because it is a tree search).

6.

If a file or directory was found in the dump but found not to be connected to the hierarchical tree, then the file or directory will be connected at the root of the tree as __ORPHANEDIR__.<#> or __ORPHANFILE__.<#>.

7.

ACLs are not restored.

CAUTIONS

Normally, use vos_restore(1) instead of this command. restorevol is a tool of last resort to try to extract data from the data structures stored in a volume dumpfile and is not as regularly tested or used as the normal vos_restore(1) implementation. Using restorevol bypasses checks done by the fileserver(8) and salvager(8).

OPTIONS

-file <dump file>

Specifies the volume dump file to be read and restored to the local filesystem. If this option is not given, the volume dump will be read from standard input.

-dir <restore dir>

Names the directory in which to create the restored filesystem. The current directory is used by default. Note that any mountpoints inside the volume will point to the same directory unless the -mountpoint option is also specified.

-extension <name extension>

By default, the name of the directory created matches the RW volume name of the volume in the dump file. If this option is used, the directory name will be the RW volume name name extension as the suffix.

-mountpoint <mount point root>

By default, mountpoints inside the volume being restored point to the value given by -dir. This option allows mountpoints to be resolved relative to another path. A common use for this would be to specify a path under /afs as the mount point root so that mountpoints inside the restored volume would be resolved via AFS. The mount point root must exist, and the process running the command have read access to that directory, or the command will fail.

-umask <mode mask>

Sets the umask while creating files. If not specified, the current process umask is used. All directories are created with mode 0777 (ANDed with the umask), and files are created with the owner, group, and user mode bits set to the owner mode bits of the relevant AFS file (ANDed with the umask).

-help

Prints the online help for this command. All other valid options are ignored.

EXAMPLES

The following command restores the contents of the dumpfile in sample.dump to the directory /tmp/sample.2009-05-17, but having all mountpoints inside the volume point to AFS (note that this requires knowledge of where sample is mounted in AFS):

   % restorevol -file sample.dump -dir /tmp -extension .2009-05-17 \
       -mountpoint /afs/example.com/sample
   Restoring volume dump of 'sample' to directory '/tmp/sample.2009-05-17'

PRIVILEGE REQUIRED

The issuer must have read access to the dump file and write access to the directory into which the dump is restored. If the -mountpoint flag is given, the issuer must also have read access to that directory.

SEE ALSO

salvager(8), voldump(8), vos_dump(1), vos_restore(1)

COPYRIGHT

Copyright 2009 Steven Jenkins <[email protected]> This documentation is covered by the BSD License as written in the doc/LICENSE file. This man page was written by Steven Jenkins for OpenAFS.