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btrfs-progs: docs: update btrfs-convert regarding reiserfs 

Signed-off-by: David Sterba <dsterba@suse.com>
This commit is contained in:
David Sterba 2017-08-22 19:18:48 +02:00
parent e75f466ddd
commit ebf449b521
1 changed files with 18 additions and 9 deletions
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27
Documentation/btrfs-convert.asciidoc
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@ -3,7 +3,7 @@ btrfs-convert(8)
NAME
----
btrfs-convert - convert from ext2/3/4 filesystem to btrfs in-place
btrfs-convert - convert from ext2/3/4 or reiserfs filesystem to btrfs in-place
SYNOPSIS
--------
@ -11,13 +11,22 @@ SYNOPSIS
DESCRIPTION
-----------
*btrfs-convert* is used to convert existing ext2/3/4 filesystem image to a
btrfs filesystem in-place. The original filesystem image is accessible
subvolume named 'ext2_saved' as file 'image'.
*btrfs-convert* is used to convert existing source filesystem image to a btrfs
filesystem in-place. The original filesystem image is accessible in subvolume
named like 'ext2_saved' as file 'image'.
WARNING: If you are going to perform rollback to ext2/3/4, you should not
execute *btrfs balance* command on the converted filesystem. This will change
the extent layout and make *btrfs-convert* unable to rollback.
Supported filesystems:
* ext2, ext3, ext4 -- original feature, always built in
* reiserfs -- since version 4.13, opptinally built, requires libreiserfscore 3.6.27
The list of supported source filesystem by a given binary is listed at the end
of help (option '--help').
WARNING: If you are going to perform rollback to the original filesystem, you
should not execute *btrfs balance* command on the converted filesystem. This
will change the extent layout and make *btrfs-convert* unable to rollback.
The conversion utilizes free space of the original filesystem. The exact
estimate of the required space cannot be foretold. The final btrfs metadata
@ -38,8 +47,8 @@ NOTE: The source filesystem should be clean, you are encouraged to run the
**REMOVE THE ORIGINAL FILESYSTEM METADATA**
By removing the 'ext2_saved' subvolume, all metadata of the original filesystem
will be removed:
By removing the subvolume named like 'ext2_saved' or 'reiserfs_saved', all
metadata of the original filesystem will be removed:
# btrfs subvolume delete /mnt/ext2_saved