doc/RelNotes/v1.44.0.txt

   1 E2fsprogs 1.44.0 (February 27, 2018)
   2 ====================================
   3
   4 Updates/Fixes since v1.43.9:
   5
   6 UI and Features
   7 ---------------
   8
   9 E2fsprogs now supports the large_dir (INCOMPAT_LARGEDIR) feature.  This
  10 feature allows larger directories to be created, both with directory
  11 sizes over 2GB and and a maximum htree depth of 3 instead of the
  12 current limit of 2.  These features are needed in order to exceed
  13 the currently limit of approximately 10M entries in a single
  14 directory for 4KB blocksize (~100k for 1KB).
  15
  16 E2fsprogs now supports the ea_inode (INCOMPAT_EA_INODE) feature, which
  17 stores large extended attributes in an external inode instead of a
  18 single data block.  This is backwards compatible with a Lustre file
  19 system feature, but it has been extended to support deduplicating
  20 extended attribute values which are used in multiple inodes.
  21
  22 The metadata_csum feature (RO_COMPAT_METADATA_CSUM) is now enabled by
  23 default by mke2fs.
  24
  25 The resize2fs program will no longer complain about resizing bigalloc
  26 file systems as being dangerous when doing an on-line resize (since this
  27 is purely a kernel feature).
  28
  29 Debugfs's ls command will now print the high bits of the inode's mode
  30 bits.
  31
  32 Fixes
  33 -----
  34
  35 Fixed some potential buffer overrun bugs in the blkid library and in the
  36 fsck program.
  37
  38 There were some corner cases which tune2fs wouldn't correctly handle
  39 when operating on a file system which was not cleanly mounted and thus
  40 required running the journal because it could be modified.  Tune2fs will
  41 now run the journal before trying to change the superblock, and if the
  42 file system needs to be checked after the journal has been replayed, it
  43 will require it before proceeding.  Also if the file system is busy (for
  44 example, because it is in use by Lustre), but is not present in the
  45 /proc/mounts or /etc/mtab, tune2fs will not try to replay the journal,
  46 since this could do real damage if it the file system is being actively
  47 modified by the kernel.
  48
  49 The libss library (used by debugfs) now supports the version 7 of the
  50 libreadline shared library.
  51
  52 The e2freefrag program will use the GETFSMAP ioctl if it is available
  53 and the file system is mounted, so that the free space statistics will
  54 be more accurate.
  55
  56
  57 Performance, Internal Implementation, Development Support etc.
  58 --------------------------------------------------------------
  59
  60 Mke2fs now uses io_channel_flush() instead of sync() for the sync_kludge
  61 feature.
  62
  63 E2fsprogs now uses i_size as the primary way of determining whether a
  64 symlink is a fast symlink.
  65
  66 Fix various compiler and UBSAN warnings.
  67
  68 Long running test are now skipped with "make check" and only run when
  69 "make fullcheck".  The test runner will warn when potentially long
  70 running tests are being run via "make check".
  71
  72 E2fsck is now much faster for bigalloc file systems when scanning
  73 extents for bigalloc file systems.  (Addresses Google Bug #36886699)