lib/CloudStore/Store.pm

   1 package CloudStore::Store;
   2 use warnings;
   3 use strict;
   4
   5 use autodie;
   6 use JSON::XS;
   7 use File::Path qw(make_path);
   8 use File::Slurp qw();
   9 use Digest::MD5 qw(md5_base64);
  10 use Data::Dump qw(dump);
  11 use Carp qw(confess);
  12 use TokyoCabinet;
  13
  14 use WarnColor;
  15
  16 sub new {
  17         my $class = shift;
  18
  19         my $self = {@_};
  20         bless $self, $class;
  21
  22         die "no dir" unless $self->{dir};
  23         $self->{md5pool} = $self->{dir} . '/md5';
  24
  25         warn "# new ",dump $self if $ENV{DEBUG};
  26
  27         return $self;
  28 }
  29
  30 sub user_set {
  31         my ( $self,$data ) = @_;
  32 }
  33
  34 sub user_get {
  35         my ( $self,$data ) = @_;
  36 }
  37
  38 sub mkbasedir {
  39         my $dir = shift;
  40         $dir =~ s{/[^/]+$}{}; # strip filename
  41         mkdir $dir unless -e $dir;
  42 }
  43
  44 sub modify_file {
  45         my ( $self,$data ) = @_;
  46
  47         if ( $data->{file} =~ m{^(.*/)?.sync/send/([^/]+)$} ) {
  48                 my $from_dir = $1;
  49                 warn "SEND $2 from $from_dir\n";
  50                 my $sent_files;
  51                 open(my $send, '<', $self->blob_path($data) );
  52                 while(<$send>) {
  53                         s/[\n\r]+$//;
  54
  55                         my ( $to, $file ) = split(/\s+/,$_,2);
  56                         my ( undef, undef, $uid, $gid, undef, undef, $email, $dir, $shell ) =
  57                                 getpwnam $to;
  58
  59                         my $from = $data;
  60                         $from->{file} = $from_dir . $file;
  61                         my $from_path = $self->blob_path($from);
  62
  63                         if ( ! -r $from_path ) {
  64                                 warn "ERROR: $from_path: $!";
  65                                 next;
  66                         }
  67
  68                         my $to_path = "$dir/received/$file";
  69                         mkbasedir $to_path;
  70
  71                         warn "SEND $from_path -> $to_path\n";
  72                         unlink $to_path if -e $to_path; # FIXME why we need this?
  73                         $sent_files->{$to} += link $from_path, $to_path;
  74                         # FIXME cross-shard
  75                         my $md5 = $self->md5sum($data)->get( $from_dir . $file ) || warn "no md5 for $from_dir$file";
  76                         $self->md5sum({login => $to})->put( "/received/$file" => $md5 );
  77                 }
  78
  79                 warn "SENT ",dump $sent_files;
  80
  81                 return 0; # skip dedup
  82         } elsif ( $data->{file} =~ m{^(.*/)?.sync/pending/([^/]+)$} ) {
  83                 my $from_dir = $1;
  84                 warn "PENDIG $2 from $from_dir";
  85                 open(my $pend, '<', $self->blob_path($data) );
  86                 while(<$pend>) {
  87                         s/[\n\r]+$//;
  88
  89                         if ( m/^DELETED\#(.+)$/ ) {
  90                                 my $path = $self->blob_path($data => $from_dir . $1 );
  91                                 if ( -e $path ) {
  92                                         warn "UNLINK $path";
  93                                         -d $path ? rmdir $path : unlink $path || warn "ERROR: unlink $path $!";
  94                                         next;
  95                                 } else {
  96                                         warn "MISSING $path to unlink";
  97                                         next;
  98                                 }
  99                         } elsif ( ! /^(MOVED|RENAMED)\#/ ) {
 100                                 warn "skip $_\n";
 101                                 next;
 102                         }
 103
 104                         my ( undef, $from, $to ) = split(/\#/,$_,3);
 105
 106                         my ( $from_path, $to_path ) = map {
 107                                 my $tmp = $data;
 108                                 $tmp->{file} = $from_dir . $_;
 109                                 $self->blob_path($tmp);
 110                         } ( $from, $to );
 111
 112                         if ( ! -e $from_path ) {
 113                                 warn "SKIPPED $from_path: $!";
 114                                 next;
 115                         }
 116
 117                         warn "MV $from_path -> $to_path";
 118                         mkbasedir $to_path;
 119                         rename $from_path, $to_path;
 120
 121                         my $md5 = $self->md5sum($data)->get( $from_dir . $from );
 122                         if ( ! $md5 ) {
 123                                 warn "ERROR: no md5sum $from_dir $from " unless $md5;
 124                                 next;
 125                         }
 126
 127                         $self->md5sum($data)->out( $from_dir . $from );
 128                         $self->md5sum($data)->put( $from_dir . $to => $md5 );
 129
 130                         warn "$md5 moved to $from_dir $to";
 131                 }
 132
 133                 return 0; # skip dedup
 134         }
 135
 136         #return $file->{size} > 4096 ? 1 : 0; # FIXME
 137         return 1; # dedup
 138 }
 139
 140 # never called by rsync directly!
 141 sub new_file {
 142         my ( $self,$data ) = @_;
 143 #       $self->file_set($data);
 144 }
 145
 146 sub remove_file {
 147         my ( $self, $data ) = @_;
 148
 149         my $md5 = $self->md5sum($data)->get( $data->{file} );
 150         return unless $md5; # directories don't have md5sums
 151         my $path = $self->{md5pool} . '/' . $md5;
 152         my ($dev,$ino,$mode,$nlink,$uid,$gid,$rdev,$size,
 153                 $atime,$mtime,$ctime,$blksize,$blocks)
 154                         = stat($path);
 155         if ( $nlink == 1 ) {
 156                 my $id = getpwnam 'md5';
 157                 chown $id,$gid, $path;
 158                 warn "# chown $id $gid $path";
 159         }
 160
 161         $self->md5sum($data)->out( $data->{file} );
 162 }
 163
 164 sub make_dir {
 165         my ( $self, $data ) = @_;
 166
 167 }
 168
 169 sub new_link {
 170         my ( $self, $data ) = @_;
 171
 172         warn "# new_link ",dump $data;
 173
 174         if ( $data->{file} =~ m{^(.*/?)\.send/([^/]+)/(.+)$} ) {
 175                 my ( $dir, $to, $name ) = ( $1, $2, $3 );
 176                 my $path = $self->blob_path($data);
 177                 my $link_to = readlink $path;
 178                 warn "$link_to";
 179                 if ( $link_to =~ s{^\Q/rsyncd-munged/\E}{/} ) {
 180
 181                         my $s = $path;
 182                         $s =~ s{/[^/]+$}{}; # strip filename
 183                         while ( $link_to =~ s{/../}{/} ) {
 184                                 $s =~ s{/[^/]+$}{} || die "can't strip $s";
 185                                 warn "## simplify $s $link_to\n";
 186                         }
 187                         $s .= $link_to;
 188
 189                         my $d = $self->blob_path({
 190                                 pid => $data->{pid},
 191                                 file => $name
 192                         });
 193
 194                         # $name can contain directories so we must create them
 195                         mkbasedir $d;
 196
 197                         if ( ! -e $s ) {
 198                                 warn "ERROR: can't find source $s";
 199                         } else {
 200
 201                                 warn "link $s -> $d\n";
 202                                 link $s, $d;
 203
 204                                 my ($l,$f) = ($1,$2) if $s =~ m{users/([^/]+)/blob/(.+)};
 205
 206 #                               my $origin = $self->file_get({
 207 #                                       login => $l,
 208 #                                       file  => $f,
 209 #                               });
 210 #                               $self->new_file($origin);
 211                                 warn "INFO: sent file ",dump($l,$f);
 212                                 my $md5 = $self->md5sum($data)->get($s);
 213                                 $self->md5sum({ login => $to })->put($d => $md5 );
 214                                 # FIXME broken!
 215                         }
 216
 217
 218                 } else {
 219                         warn "ERROR: can't SEND To:$to Name:$name Link:$link_to";
 220                 }
 221         }
 222 }
 223
 224 sub md5sum {
 225         my ( $self, $data ) = @_;
 226
 227         my $login = $data->{login} || confess "missing login in ",dump $data;
 228
 229         return $self->{md5sum}->{$login} if exists $self->{md5sum}->{$login};
 230
 231         my ( undef, undef, $uid, $gid, undef, undef, $email, $dir, $shell ) =
 232                 getpwnam $login;
 233
 234         my $md5_path = "$dir/.md5";
 235
 236         my $db = TokyoCabinet::HDB->new();
 237         $db->open($md5_path, $db->OWRITER | $db->OCREAT)
 238         or die "can't open $md5_path: ",$db->errmsg( $db->ecode );
 239
 240         warn "open $md5_path";
 241
 242         $self->{md5sum}->{$login} = $db;
 243         return $db;
 244 }
 245
 246 sub rsync_log {
 247         my ( $self, $data ) = @_;
 248         if ( $data =~ m/\[(\d+)\] rsync \w+ (\S+) \w+ (\S+)/ ) {
 249                 my ( $pid, $module, $login ) = ( $1, $2, $3 );
 250
 251                 $login =~ s/\@.+//;
 252                 my ( undef, undef, $uid, $gid, undef, undef, $email, $dir, $shell ) =
 253                         getpwnam $login;
 254
 255                 $self->{pid}->{$pid} = {
 256                         login => $login,
 257                         uid => $uid,
 258                         gid => $gid,
 259                         email => $email,
 260                         dir => $dir,
 261                         shell => $shell,
 262                 };
 263
 264                 warn "created $pid";
 265
 266         } elsif ( $data =~ m/\[(\d+)\] sent \S+ bytes\s+received \S+ bytes/ ) {
 267                 my $pid = $1;
 268
 269                 foreach my $login ( keys %{ $self->{md5sum} } ) {
 270                         $self->{md5sum}->{$login}->close;
 271                         warn "close md5sum $login";
 272                 }
 273                 delete $self->{md5sum};
 274
 275                 delete $self->{pid}->{$pid};
 276                 warn "removed $pid";
 277
 278         } else {
 279 #               warn "## rsync_log $data";
 280         }
 281 }
 282
 283 sub blob_path {
 284         my ( $self, $data, $path ) = @_;
 285         my $blob = $self->{pid}->{ $data->{pid} }->{dir} || die "no dir for $data->{pid} in ",dump( $self->{pid} );
 286         $blob .= '/' . ( defined $path ? $path : $data->{file} );
 287         return $blob;
 288 }
 289
 290
 291 sub rsync_transfer {
 292         my ( $self,$data ) = @_;
 293
 294         my $path = $self->blob_path($data);
 295
 296         if ( $data->{itemize} =~ m/^[c>]([fdL])/ ) { # received change/create
 297                 my $type = $1;
 298
 299                 if ( $type eq 'f' ) {
 300                         $self->modify_file( $data ) && # selective dedup
 301                         $self->dedup( $data, $path );
 302                 } elsif ( $type eq 'd' ) {
 303                         $self->make_dir( $data );
 304                 } elsif ( $type eq 'L' ) {
 305                         $self->new_link( $data );
 306                 } else {
 307                         die "unknown type $type ", dump $data;
 308                 }
 309         } elsif ( $data->{itemize} =~ m/\*deleting/ ) {
 310                 $self->remove_file($data);
 311         } else {
 312                 warn "IGNORED ",dump($data) if $ENV{DEBUG};
 313         }
 314         return $data;
 315 }
 316
 317 sub md5pool {
 318         my ( $self, $data ) = @_;
 319
 320         my $pool = $self->{md5pool} || die "no md5pool in ",dump $self;
 321         mkdir $pool unless -e $pool;
 322
 323         my $md5 = $data->{md5} || die "no md5 in ",dump $data;
 324         my $path = $self->blob_path($data);
 325
 326         if ( -e "$pool/$md5" ) {
 327                 warn "dedup hit $md5 $path\n";
 328                 my $dedup = $path . '.dedup';
 329                 rename $path, $dedup;
 330                 link "$pool/$md5", $path;
 331                 unlink $dedup;
 332                 # FIXME fix perms?
 333         } else {
 334                 link $path, "$pool/$md5";
 335                 warn "dedup +++ $md5 $path";
 336         }
 337
 338         $self->md5sum($data)->put( $data->{file} => $md5 );
 339 }
 340
 341 my $empty_md5 = " " x 32;
 342
 343 sub dedup {
 344         my ( $self, $data, $path ) = @_;
 345
 346         if ( $data->{file} =~ /^(.+\/)?md5sum$/ ) {
 347                 my $dir = $1;
 348                 my $imported = 0;
 349                 warn "IMPORT ", $data->{file}, "\n";
 350                 open(my $md5sum, '<', $path);
 351                 while(<$md5sum>) {
 352                         chomp;
 353                         my ( $md5, $file ) = split(/\s+/,$_,2);
 354                         if ( ! -e "$self->{md5path}/$md5" ) {
 355                                 warn "MISSING $md5 $file\n";
 356                                 next;
 357                         }
 358                         my $new = {
 359                                 pid => $data->{pid},
 360                                 file => "$dir$file",
 361                                 md5 => $md5,
 362                         };
 363                         my $new_path = $self->blob_path($new);
 364                         if ( ! -e $new_path ) {
 365                                 # create path from md5sum file
 366                                 mkbasedir $new_path;
 367                                 $imported += link "$self->{md5path}/$md5", $new_path;
 368                                 $self->new_file($new);
 369                                 warn "import from $path ",dump($new);
 370                                 $self->md5pool( $new );
 371                         } else {
 372                                 $self->md5pool( $new );
 373                         }
 374                 }
 375                 print "INFO imported $imported files from ",dump($data);
 376         }
 377
 378         if ( $data->{md5} ne $empty_md5 ) {
 379                 $self->md5pool( $data );
 380         } else {
 381                 warn "empty md5", dump $data;
 382         }
 383 }
 384
 385 1;