diff options
| author | David Sterba <dsterba@suse.com> | 2016-09-02 16:57:23 +0200 |
|---|---|---|
| committer | David Sterba <dsterba@suse.com> | 2016-09-21 11:46:33 +0200 |
| commit | a5bd84871999f0fc4237a36d378678189aa2a185 (patch) | |
| tree | 29dc83e196a00c8e66e4ff2a4e3ced9744a4b932 /Documentation | |
| parent | bde687343b827bd425e912136ecf191c593b38fd (diff) | |
btrfs-progs: dump-super: changes in options to specify superblocks
Some tools (check, select-super, dump-super) can use the alternate
superblocks, but the options are not consistent. To make it less
confusing, change the meaning of option -s in 'dump-super' to specify
the superblock copy, instead of taking the offset.
Though this is a change in UI, the old usage is detected and the result
would be the same, no breakage in existing scripts.
Signed-off-by: David Sterba <dsterba@suse.com>
Diffstat (limited to 'Documentation')
| -rw-r--r-- | Documentation/btrfs-inspect-internal.asciidoc | 29 |
1 files changed, 20 insertions, 9 deletions
diff --git a/Documentation/btrfs-inspect-internal.asciidoc b/Documentation/btrfs-inspect-internal.asciidoc index 74f6dea8..44615e76 100644 --- a/Documentation/btrfs-inspect-internal.asciidoc +++ b/Documentation/btrfs-inspect-internal.asciidoc @@ -30,25 +30,36 @@ Besides verifictaion of the filesystem signature, there are no other sanity checks. The superblock checksum status is reported, the device item and filesystem UUIDs are checked and reported. + +NOTE: the meaning of option '-s' has changed in version 4.8 to be consistent +with other tools to specify superblock copy rather the offset. The old way still +works, but prints a warning. Please update your scripts to use '--bytenr' +instead. The option '-i' has been deprecated. ++ `Options` + -f|--full:::: print full superblock information, including the system chunk array and backup roots -a|--all:::: -print information about all present superblock copies (cannot be used together with '-i' option) --i <super_mirror>:::: -specify which mirror to print, valid values are 0, 1 and 2 and the superblock must be present on the device +print information about all present superblock copies (cannot be used together +with '-s' option) +-i <super>:::: +(deprecated since 4.8, same behaviour as '--super') +--bytenr <bytenr>:::: +specify offset to a superblock in a non-standard location at 'bytenr', useful +for debugging (disables the '-f' option) + -If there are multiple options specified, only the last one is applies. +If there are multiple options specified, only the last one applies. + -F|--force:::: -attempt to print the superblock even if thre's no valid BTRFS signature found +attempt to print the superblock even if thre's no valid BTRFS signature found, +the result may be completely wrong if the data do not resemble a superblock + -The result may be completely wrong if the data do not resemble a superblock. +-s|--super <bytenr>:::: +(see compatibility note above) + --s <bytenr>:::: -specify offset to a superblock in a non-standard location at 'bytenr', useful -for debugging (disables the '-f' option) +specify which mirror to print, valid values are 0, 1 and 2 and the superblock +must be present on the device with a valid signature, can be used together with +'--force' *dump-tree* [options] <device>:: (replaces the standalone tool *btrfs-debug-tree*) |