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send-dump.pl
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send-dump.pl
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#!/usr/bin/perl
# Dumper for btrfs send streams.
# Released under the same terms, or lack thereof, as btrfs-dump.pl.
open($f,$ARGV[0]) or die "Error opening ".$ARGV[0].": ".$!;
binmode($f);
while (!eof($f)) {
do_stream($f);
if (!eof($f)) {
print "---\n";
}
}
close($f);
sub do_stream {
my ($f)=@_;
read($f,$a,0x11);
($magic,$ver)=unpack("a13V",$a);
if ($magic ne "btrfs-stream\0") {
printf STDERR "Not a send file.\n";
close($f);
exit;
}
if ($ver != 1) {
printf STDERR "Version $ver not supported.\n";
close($f);
exit;
}
$type = 0;
while (!eof($f) && $type != 21) {
read($f,$a,0xa);
($len,$type,$crc)=unpack("VvV",$a);
if ($type == 1) {
printf("subvol, %x, %08x\n", $len, $crc);
} elsif ($type == 2) {
printf("snapshot, %x, %08x\n", $len, $crc);
} elsif ($type == 3) {
printf("mkfile, %x, %08x\n", $len, $crc);
} elsif ($type == 4) {
printf("mkdir, %x, %08x\n", $len, $crc);
} elsif ($type == 5) {
printf("mknod, %x, %08x\n", $len, $crc);
} elsif ($type == 6) {
printf("mkfifo, %x, %08x\n", $len, $crc);
} elsif ($type == 7) {
printf("mksock, %x, %08x\n", $len, $crc);
} elsif ($type == 8) {
printf("symlink, %x, %08x\n", $len, $crc);
} elsif ($type == 9) {
printf("rename, %x, %08x\n", $len, $crc);
} elsif ($type == 10) {
printf("link, %x, %08x\n", $len, $crc);
} elsif ($type == 11) {
printf("unlink, %x, %08x\n", $len, $crc);
} elsif ($type == 12) {
printf("rmdir, %x, %08x\n", $len, $crc);
} elsif ($type == 13) {
printf("set_xattr, %x, %08x\n", $len, $crc);
} elsif ($type == 14) {
printf("remove_xattr, %x, %08x\n", $len, $crc);
} elsif ($type == 15) {
printf("write, %x, %08x\n", $len, $crc);
} elsif ($type == 16) {
printf("clone, %x, %08x\n", $len, $crc);
} elsif ($type == 17) {
printf("truncate, %x, %08x\n", $len, $crc);
} elsif ($type == 18) {
printf("chmod, %x, %08x\n", $len, $crc);
} elsif ($type == 19) {
printf("chown, %x, %08x\n", $len, $crc);
} elsif ($type == 20) {
printf("utimes, %x, %08x\n", $len, $crc);
} elsif ($type == 21) {
printf("end, %x, %08x\n", $len, $crc);
} elsif ($type == 22) {
printf("update-extent, %x, %08x\n", $len, $crc);
} else {
printf("unknown(%x), %x, %08x\n", $type, $len, $crc);
}
read($f,$b,$len);
print_tlvs($b);
}
}
sub btrfstime {
my ($t)=@_;
my $ut = unpack("Q",$t);
my @lt = localtime($ut);
return sprintf("%04u-%02u-%02u %02u:%02u:%02u",$lt[5]+1900,$lt[4]+1,$lt[3],$lt[2],$lt[1],$lt[0]);
}
sub print_tlvs {
my ($b)=@_;
while (length($b)>0) {
my ($t,$l)=unpack("vv",$b);
if ($t == 1) {
printf(" uuid: %08x-%04x-%04x-%04x-%02x%02x%02x%02x%02x%02x\n", unpack("NnnnCCCCCC",substr($b,4,$l)));
$b=substr($b,$l+4);
} elsif ($t == 2) {
printf(" transid: %x\n", unpack("Q",substr($b,4,$l)));
$b=substr($b,$l+4);
} elsif ($t == 3) {
printf(" inode: %x\n", unpack("Q",substr($b,4,$l)));
$b=substr($b,$l+4);
} elsif ($t == 4) {
printf(" size: %x\n", unpack("Q",substr($b,4,$l)));
$b=substr($b,$l+4);
} elsif ($t == 5) {
printf(" mode: %o\n", unpack("Q",substr($b,4,$l)));
$b=substr($b,$l+4);
} elsif ($t == 6) {
printf(" uid: %u\n", unpack("Q",substr($b,4,$l)));
$b=substr($b,$l+4);
} elsif ($t == 7) {
printf(" gid: %u\n", unpack("Q",substr($b,4,$l)));
$b=substr($b,$l+4);
} elsif ($t == 8) {
printf(" rdev: %x\n", unpack("Q",substr($b,4,$l)));
$b=substr($b,$l+4);
} elsif ($t == 9) {
printf(" ctime: %s\n", btrfstime(substr($b,4,$l)));
$b=substr($b,$l+4);
} elsif ($t == 10) {
printf(" mtime: %s\n", btrfstime(substr($b,4,$l)));
$b=substr($b,$l+4);
} elsif ($t == 11) {
printf(" atime: %s\n", btrfstime(substr($b,4,$l)));
$b=substr($b,$l+4);
} elsif ($t == 12) {
printf(" otime: %s\n", btrfstime(substr($b,4,$l)));
$b=substr($b,$l+4);
} elsif ($t == 13) {
printf(" xattr_name: \"%s\"\n", substr($b,4,$l));
$b=substr($b,$l+4);
} elsif ($t == 14) {
printf(" xattr_data: \"%s\"\n", substr($b,4,$l));
$b=substr($b,$l+4);
} elsif ($t == 15) {
printf(" path: \"%s\"\n", substr($b,4,$l));
$b=substr($b,$l+4);
} elsif ($t == 16) {
printf(" path_to: \"%s\"\n", substr($b,4,$l));
$b=substr($b,$l+4);
} elsif ($t == 17) {
printf(" path_link: \"%s\"\n", substr($b,4,$l));
$b=substr($b,$l+4);
} elsif ($t == 18) {
printf(" offset: %x\n", unpack("Q",substr($b,4,$l)));
$b=substr($b,$l+4);
} elsif ($t == 19) {
printf(" data: (%x bytes)\n", $l);
$b=substr($b,$l+4);
} elsif ($t == 20) {
printf(" clone_uuid: %08x-%04x-%04x-%04x-%02x%02x%02x%02x%02x%02x\n", unpack("NnnnCCCCCC",substr($b,4,$l)));
$b=substr($b,$l+4);
} elsif ($t == 21) {
printf(" clone_transid: %x\n", unpack("Q",substr($b,4,$l)));
$b=substr($b,$l+4);
} elsif ($t == 22) {
printf(" clone_path: \"%s\"\n", substr($b,4,$l));
$b=substr($b,$l+4);
} elsif ($t == 23) {
printf(" clone_offset: %x\n", unpack("Q",substr($b,4,$l)));
$b=substr($b,$l+4);
} elsif ($t == 24) {
printf(" clone_len: %x\n", unpack("Q",substr($b,4,$l)));
$b=substr($b,$l+4);
} else {
printf(" unknown(%u),%x\n",$t,$l);
$b=substr($b,$l+4);
}
}
}