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David Teigland aecf542126 metadata: prevent writing beyond metadata area
lvm uses a bcache block size of 128K.  A bcache block
at the end of the metadata area will overlap the PEs
from which LVs are allocated.  How much depends on
alignments.  When lvm reads and writes one of these
bcache blocks to update VG metadata, it can also be
reading and writing PEs that belong to an LV.

If these overlapping PEs are being written to by the
LV user (e.g. filesystem) at the same time that lvm
is modifying VG metadata in the overlapping bcache
block, then the user's updates to the PEs can be lost.

This patch is a quick hack to prevent lvm from writing
past the end of the metadata area.
2018-10-29 16:53:17 -05:00
autoconf autoconf: Fix py-compile permissions 2016-02-18 01:05:05 +00:00
base cov: add at least ASSERT 2018-10-15 17:49:44 +02:00
conf build: make genrate config file 2018-10-11 11:06:23 +02:00
coverity coverity: model few more functions 2017-06-27 12:17:16 +02:00
daemons cov: dmeventd plugin fix memleak 2018-10-15 17:49:22 +02:00
device_mapper cov: drop uneeded header files 2018-10-15 17:49:44 +02:00
doc Merge branch 'master' into 2018-05-11-fork-libdm 2018-06-01 13:04:12 +01:00
include build: Update configure 2018-09-14 13:53:29 +02:00
lib metadata: prevent writing beyond metadata area 2018-10-29 16:53:17 -05:00
libdaemon device_mapper: remove dbg_malloc. 2018-06-08 13:40:53 +01:00
libdm cov: shutdown warning 2018-10-16 21:55:19 +02:00
man build: make generate 2018-10-10 11:25:50 +02:00
nix lockd: Clean up spec 2015-07-04 14:36:57 +02:00
po doc: change fsf address 2016-01-21 12:11:37 +01:00
scripts More cleanup needed for dropped scripts 2018-09-13 11:09:25 -05:00
spec spec: lvmdbusd requires python3 setuptools 2018-10-22 12:51:51 +02:00
test tests: add new test for lvm on md devices 2018-10-18 13:06:42 -05:00
tools cov: pvscan ensure sigle_devs list is always initialized 2018-10-15 17:49:44 +02:00
udev udev: keep systemd vars on change event in 69-dm-lvm-metad.rules for systemd reload 2018-04-17 11:38:12 +02:00
.gitignore gitignore 2018-05-23 16:53:18 +02:00
acinclude.m4 [build] uncomment 'serial 3' in an m4 file. 2018-04-30 09:44:27 +01:00
aclocal.m4 liblvm: remove lvmapi 2018-06-08 09:38:05 +01:00
configure build: Use PYTHON env. variable when provided 2018-10-10 13:27:16 +02:00
configure.ac build: Use PYTHON env. variable when provided 2018-10-10 13:27:16 +02:00
COPYING doc: change fsf address 2016-01-21 12:11:37 +01:00
COPYING.BSD Add BSD 2-Clause License 2018-07-27 17:09:46 +02:00
COPYING.LIB Fix inconsistent licence notices: executables are GPLv2; libraries LGPLv2.1. 2007-08-20 20:55:30 +00:00
INSTALL quick review of docs 2008-11-04 17:49:22 +00:00
make.tmpl.in build: add vdo configuration option --with-vdo= 2018-07-09 15:28:35 +02:00
Makefile.in Remove lvmetad 2018-07-11 11:26:42 -05:00
README pre-release 2018-10-10 11:26:53 +02:00
TESTING docs: Add TESTING file 2017-12-14 16:45:47 +01:00
VERSION post-release 2018-10-10 13:27:16 +02:00
VERSION_DM post-release 2018-10-10 13:27:16 +02:00
WHATS_NEW post-release 2018-10-10 13:27:16 +02:00
WHATS_NEW_DM post-release 2018-10-10 13:27:16 +02:00

This tree contains the LVM2 and device-mapper tools and libraries.

This is development branch, for stable 2.02 release see 2018-06-01-stable
branch.

For more information about LVM2 read the changelog in the WHATS_NEW file.
Installation instructions are in INSTALL.

There is no warranty - see COPYING and COPYING.LIB.

Tarballs are available from:
  ftp://sourceware.org/pub/lvm2/
  ftp://sources.redhat.com/pub/lvm2/
  https://github.com/lvmteam/lvm2/releases

The source code is stored in git:
  https://sourceware.org/git/?p=lvm2.git
  git clone git://sourceware.org/git/lvm2.git
mirrored to:
  https://github.com/lvmteam/lvm2
  git clone https://github.com/lvmteam/lvm2.git
  git clone git@github.com:lvmteam/lvm2.git

Mailing list for general discussion related to LVM2:
  linux-lvm@redhat.com
  Subscribe from https://www.redhat.com/mailman/listinfo/linux-lvm

Mailing lists for LVM2 development, patches and commits:
  lvm-devel@redhat.com
  Subscribe from https://www.redhat.com/mailman/listinfo/lvm-devel

  lvm2-commits@lists.fedorahosted.org (Read-only archive of commits)
  Subscribe from https://fedorahosted.org/mailman/listinfo/lvm2-commits

Mailing list for device-mapper development, including kernel patches
and multipath-tools:
  dm-devel@redhat.com
  Subscribe from https://www.redhat.com/mailman/listinfo/dm-devel

Website:
  https://sourceware.org/lvm2/

Report upstream bugs at:
  https://bugzilla.redhat.com/enter_bug.cgi?product=LVM%20and%20device-mapper
or open issues at:
  https://github.com/lvmteam/lvm2/issues

The source code repository used until 7th June 2012 is accessible here:
  http://sources.redhat.com/cgi-bin/cvsweb.cgi/LVM2/?cvsroot=lvm2.