zypp/DiskUsageCounter.cc

   1 /*---------------------------------------------------------------------\
   2 |                          ____ _   __ __ ___                          |
   3 |                         |__  / \ / / . \ . \                         |
   4 |                           / / \ V /|  _/  _/                         |
   5 |                          / /__ | | | | | |                           |
   6 |                         /_____||_| |_| |_|                           |
   7 |                                                                      |
   8 \---------------------------------------------------------------------*/
   9 /** \file       zypp/DiskUsageCounter.cc
  10  *
  11  */
  12 extern "C"
  13 {
  14 #include <sys/statvfs.h>
  15 }
  16
  17 #include <iostream>
  18 #include <fstream>
  19
  20 #include "zypp/base/Easy.h"
  21 #include "zypp/base/LogTools.h"
  22 #include "zypp/base/DtorReset.h"
  23 #include "zypp/base/String.h"
  24
  25 #include "zypp/DiskUsageCounter.h"
  26 #include "zypp/ExternalProgram.h"
  27 #include "zypp/sat/Pool.h"
  28 #include "zypp/sat/detail/PoolImpl.h"
  29
  30 using std::endl;
  31
  32 ///////////////////////////////////////////////////////////////////
  33 namespace zypp
  34 { /////////////////////////////////////////////////////////////////
  35
  36   ///////////////////////////////////////////////////////////////////
  37   namespace
  38   { /////////////////////////////////////////////////////////////////
  39
  40     DiskUsageCounter::MountPointSet calcDiskUsage( DiskUsageCounter::MountPointSet result, const Bitmap & installedmap_r )
  41     {
  42       if ( result.empty() )
  43       {
  44         // partitioning is not set
  45         return result;
  46       }
  47
  48       sat::Pool satpool( sat::Pool::instance() );
  49
  50       // init libsolv result vector with mountpoints
  51       static const ::DUChanges _initdu = { 0, 0, 0, 0 };
  52       std::vector< ::DUChanges> duchanges( result.size(), _initdu );
  53       {
  54         unsigned idx = 0;
  55         for_( it, result.begin(), result.end() )
  56         {
  57           duchanges[idx].path = it->dir.c_str();
  58           if ( it->growonly )
  59             duchanges[idx].flags |= DUCHANGES_ONLYADD;
  60           ++idx;
  61         }
  62       }
  63       // now calc...
  64       ::pool_calc_duchanges( satpool.get(),
  65                              const_cast<Bitmap &>(installedmap_r),
  66                              &duchanges[0],
  67                              duchanges.size() );
  68
  69       // and process the result
  70       {
  71         unsigned idx = 0;
  72         for_( it, result.begin(), result.end() )
  73         {
  74           static const ByteCount blockAdjust( 2, ByteCount::K ); // (files * blocksize) / (2 * 1K)
  75           it->pkg_size = it->used_size          // current usage
  76                        + duchanges[idx].kbytes  // package data size
  77                        + ( duchanges[idx].files * it->block_size / blockAdjust ); // half block per file
  78           ++idx;
  79         }
  80       }
  81
  82       return result;
  83     }
  84
  85     /////////////////////////////////////////////////////////////////
  86   } // namespace
  87   ///////////////////////////////////////////////////////////////////
  88
  89   DiskUsageCounter::MountPointSet DiskUsageCounter::disk_usage( const ResPool & pool_r ) const
  90   {
  91     Bitmap bitmap( Bitmap::poolSize );
  92
  93     // build installedmap (installed != transact)
  94     // stays installed or gets installed
  95     for_( it, pool_r.begin(), pool_r.end() )
  96     {
  97       if ( it->status().isInstalled() != it->status().transacts() )
  98       {
  99         bitmap.set( sat::asSolvable()(*it).id() );
 100       }
 101     }
 102     return calcDiskUsage( _mps, bitmap );
 103   }
 104
 105   DiskUsageCounter::MountPointSet DiskUsageCounter::disk_usage( sat::Solvable solv_r ) const
 106   {
 107     Bitmap bitmap( Bitmap::poolSize );
 108     bitmap.set( solv_r.id() );
 109
 110     // temp. unset @system Repo
 111     DtorReset tmp( sat::Pool::instance().get()->installed );
 112     sat::Pool::instance().get()->installed = nullptr;
 113
 114     return calcDiskUsage( _mps, bitmap );
 115   }
 116
 117   DiskUsageCounter::MountPointSet DiskUsageCounter::disk_usage( const Bitmap & bitmap_r ) const
 118   {
 119     // temp. unset @system Repo
 120     DtorReset tmp( sat::Pool::instance().get()->installed );
 121     sat::Pool::instance().get()->installed = nullptr;
 122
 123     return calcDiskUsage( _mps, bitmap_r );
 124   }
 125
 126   DiskUsageCounter::MountPointSet DiskUsageCounter::detectMountPoints( const std::string & rootdir )
 127   {
 128     DiskUsageCounter::MountPointSet ret;
 129
 130       std::ifstream procmounts( "/proc/mounts" );
 131
 132       if ( !procmounts ) {
 133         WAR << "Unable to read /proc/mounts" << std::endl;
 134       } else {
 135
 136         std::string prfx;
 137         if ( rootdir != "/" )
 138           prfx = rootdir; // rootdir not /
 139
 140         while ( procmounts ) {
 141           std::string l = str::getline( procmounts );
 142           if ( !(procmounts.fail() || procmounts.bad()) ) {
 143             // data to consume
 144
 145             // rootfs           /               rootfs          rw 0 0
 146             // /dev/root        /               reiserfs        rw 0 0
 147             // proc             /proc           proc            rw 0 0
 148             // devpts           /dev/pts        devpts          rw 0 0
 149             // /dev/hda5        /boot           ext2            rw 0 0
 150             // shmfs            /dev/shm        shm             rw 0 0
 151             // usbdevfs         /proc/bus/usb   usbdevfs        rw 0 0
 152
 153             std::vector<std::string> words;
 154             str::split( l, std::back_inserter(words) );
 155
 156             if ( words.size() < 3 ) {
 157               WAR << "Suspicious entry in /proc/mounts: " << l << std::endl;
 158               continue;
 159             }
 160
 161             //
 162             // Filter devices without '/' (proc,shmfs,..)
 163             //
 164             if ( words[0].find( '/' ) == std::string::npos ) {
 165               DBG << "Discard mount point : " << l << std::endl;
 166               continue;
 167             }
 168
 169             // remove /proc entry
 170             if (words[0] == "/proc")
 171             {
 172               DBG << "Discard /proc filesystem: " << l << std::endl;
 173               continue;
 174             }
 175
 176             //
 177             // Filter mountpoints not at or below _rootdir
 178             //
 179             std::string mp = words[1];
 180             if ( prfx.size() ) {
 181               if ( mp.compare( 0, prfx.size(), prfx ) != 0 ) {
 182                 // mountpoint not below rootdir
 183                 DBG << "Unwanted mount point : " << l << std::endl;
 184                 continue;
 185               }
 186               // strip prfx
 187               mp.erase( 0, prfx.size() );
 188               if ( mp.empty() ) {
 189                 mp = "/";
 190               } else if ( mp[0] != '/' ) {
 191                 // mountpoint not below rootdir
 192                 DBG << "Unwanted mount point : " << l << std::endl;
 193                 continue;
 194               }
 195             }
 196
 197             //
 198             // Filter cdrom
 199             //
 200             if ( words[2] == "iso9660" ) {
 201               DBG << "Discard cdrom : " << l << std::endl;
 202               continue;
 203             }
 204
 205             if ( words[2] == "vfat" || words[2] == "fat" || words[2] == "ntfs" || words[2] == "ntfs-3g")
 206             {
 207               MIL << words[1] << " contains ignored fs (" << words[2] << ')' << std::endl;
 208               continue;
 209             }
 210
 211             //
 212             // Filter some common unwanted mountpoints
 213             //
 214             const char * mpunwanted[] = {
 215               "/mnt", "/media", "/mounts", "/floppy", "/cdrom",
 216               "/suse", "/var/tmp", "/var/adm/mount", "/var/adm/YaST",
 217               /*last*/0/*entry*/
 218             };
 219
 220             const char ** nomp = mpunwanted;
 221             for ( ; *nomp; ++nomp ) {
 222               std::string pre( *nomp );
 223               if ( mp.compare( 0, pre.size(), pre ) == 0 // mp has prefix pre
 224                    && ( mp.size() == pre.size() || mp[pre.size()] == '/' ) ) {
 225                 break;
 226               }
 227             }
 228             if ( *nomp ) {
 229               DBG << "Filter mount point : " << l << std::endl;
 230               continue;
 231             }
 232
 233             //
 234             // Check whether mounted readonly
 235             //
 236             MountPoint::HintFlags hints;
 237
 238             std::vector<std::string> flags;
 239             str::split( words[3], std::back_inserter(flags), "," );
 240
 241             for ( unsigned i = 0; i < flags.size(); ++i ) {
 242               if ( flags[i] == "ro" ) {
 243                 hints |= MountPoint::Hint_readonly;
 244                 break;
 245               }
 246             }
 247             if ( hints.testFlag( MountPoint::Hint_readonly ) ) {
 248               DBG << "Filter ro mount point : " << l << std::endl;
 249               continue;
 250             }
 251
 252             //
 253             // check for snapshotting btrfs
 254             //
 255             if ( words[2] == "btrfs" )
 256             {
 257               if ( geteuid() != 0 )
 258               {
 259                 DBG << "Assume snapshots on " << words[1] << ": non-root user can't check" << std::endl;
 260                 hints |= MountPoint::Hint_growonly;
 261               }
 262               else
 263               {
 264                 // For now just check whether there is
 265                 // at least one snapshot on the volume:
 266                 ExternalProgram prog({"btrfs","subvolume","list","-s",words[1]});
 267                 std::string line( prog.receiveLine() );
 268                 if ( ! line.empty() )
 269                 {
 270                   DBG << "Found a snapshot on " << words[1] << ": " << line; // has trailing std::endl
 271                   hints |= MountPoint::Hint_growonly;
 272                 }
 273                 prog.kill();
 274               }
 275             }
 276
 277             //
 278             // statvfs (full path!) and get the data
 279             //
 280             struct statvfs sb;
 281             if ( statvfs( words[1].c_str(), &sb ) != 0 ) {
 282               WAR << "Unable to statvfs(" << words[1] << "); errno " << errno << std::endl;
 283               ret.insert( DiskUsageCounter::MountPoint( mp, words[2], 0LL, 0LL, 0LL, 0LL, hints ) );
 284             }
 285             else
 286             {
 287               //
 288               // Filter zero sized devices (bnc#769819)
 289               //
 290               if ( sb.f_blocks == 0 || sb.f_bsize == 0 )
 291               {
 292                 DBG << "Filter zero-sized mount point : " << l << std::endl;
 293                 continue;
 294               }
 295               ret.insert( DiskUsageCounter::MountPoint( mp, words[2], sb.f_bsize,
 296                 ((long long)sb.f_blocks)*sb.f_bsize/1024,
 297                 ((long long)(sb.f_blocks - sb.f_bfree))*sb.f_bsize/1024, 0LL, hints ) );
 298             }
 299           }
 300         }
 301     }
 302
 303     return ret;
 304   }
 305
 306   DiskUsageCounter::MountPointSet DiskUsageCounter::justRootPartition()
 307   {
 308     DiskUsageCounter::MountPointSet ret;
 309     ret.insert( DiskUsageCounter::MountPoint() );
 310     return ret;
 311   }
 312
 313   std::ostream & operator<<( std::ostream & str, const DiskUsageCounter::MountPoint & obj )
 314   {
 315      str << "dir:[" << obj.dir << "] [ bs: " << obj.blockSize()
 316         << " ts: " << obj.totalSize()
 317         << " us: " << obj.usedSize()
 318         << " (+-: " << obj.commitDiff()
 319         << ")" << (obj.readonly?"r":"") << (obj.growonly?"g":"") << " " << obj.fstype << "]";
 320     return str;
 321   }
 322
 323   std::ostream & operator<<( std::ostream & str, const DiskUsageCounter::MountPointSet & obj )
 324   { return dumpRange( str, obj.begin(), obj.end() ); }
 325
 326   /////////////////////////////////////////////////////////////////
 327 } // namespace zypp
 328 ///////////////////////////////////////////////////////////////////