Try to restore files from a damaged btrfs filesystem(unmounted)
btrfs restore [options] <device> <path> | -l <device>
btrfs restore is used to try to salvage files from a damaged filesystem and restore them into <path> or just list the tree roots.
Since current btrfs-check(8) or btrfs-rescue(8) only has very limited usage, btrfs restore is normally a better choice.
It is recommended to read the following btrfs wiki page if your data is not salvaged with default option: \m[blue]https://btrfs.wiki.kernel.org/index.php/Restore\m
get snapshots, btrfs restore skips snapshots in default.
get extended attributes.
overwrite directories/files in <path>.
use <bytenr> to read root tree.
only restore files that are under specified root whose root bytenr is <bytenr>.
use given superblock mirror identified by <mirror>, it can be 0,1,2.
only restore files that are under specified root whose objectid is <rootid>.
list tree roots.
dry run (only list files that would be recovered).
restore only filenames matching regex, you have to use following syntax (possibly quoted): ^/(|home(|/username(|/Desktop(|/.*))))$
ignore case (--path-regrex only).
btrfs restore returns a zero exit status if it succeeds. Non zero is returned in case of failure.
btrfs is part of btrfs-progs. Please refer to the btrfs wiki \m[blue]http://btrfs.wiki.kernel.org\m for further details.