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LVM2 mirror repository https://sourceware.org/lvm2/
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Mikulas Patocka ed30145f4a libdm: fix races with udev 
On modern systems udev manages nodes in /dev/mapper directory.
It creates, deletes and renames the nodes according to the
state of the kernel driver.

When the dmsetup is compiled without udev support (--enable-udev_sync)
and runs on the system with running udevd it tries to manage nodes in
/dev/mapper too, so it can race with udev.
dmsetup checks if the node was created/deleted/renamed with the stat
syscall, and skips the operation if it was. However, if udev
creates/deletes/renames the node after the stat syscall and before the
mknod/unlink/rename syscall, dmsetup reports an error.

Since in the system everything happened as expected, skip reporting
error for such case.

These races can be easily provoked by inserting sleep at appropriate
places.

Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
2013-10-17 11:57:33 +02:00
autoconf Using Fedora 14's autoreconf. 2011-01-07 14:38:34 +00:00
conf release 2.02.103 2013-10-04 14:32:23 +01:00
daemons cleanup: WHATS_NEW + compiler warning about discarding const 2013-10-10 09:09:16 +02:00
doc conf: add separate 'conf' dir for config files 2013-07-02 15:22:11 +02:00
include reporting: Add devtypes command. 2013-09-18 01:09:15 +01:00
lib coverity: assigned variable not used and reassigned later 2013-10-16 15:06:43 +02:00
libdaemon libdaemon: Fix a subtle race in worker thread creation. 2013-10-10 00:34:35 +02:00
libdm libdm: fix races with udev 2013-10-17 11:57:33 +02:00
liblvm lvm2app: lvm_list_pvs_free seg. fault when no PVs 2013-08-14 15:17:39 -05:00
man cmdline: Add --ignoreskippedcluster. 2013-10-01 21:20:10 +01:00
old-tests Add .gitignore files for an in-source-tree build. 2012-06-08 16:26:21 +01:00
po INSTALL rules updates 2010-04-09 21:42:48 +00:00
python python-lvm: Correct parsing arguments for integers 2013-07-26 10:24:01 -05:00
report-generators add copyright notices to new files 2010-07-28 12:20:38 +00:00
reports [REPORT-GENERATORS] cut down stylsheet.css to what we actually use 2010-07-21 10:00:38 +00:00
scripts lvmconf: use_lvmetad=0 on --enable-cluster, reset to default on --disable-cluster 2013-09-24 14:03:42 +02:00
test tests: correct LVM_TEST_THIN_CHECK_CMD 2013-10-16 15:10:03 +02:00
tools coverity: sscanf should use "%u" instead of "%i" 2013-10-17 10:17:16 +02:00
udev udev: add support for "NOSCAN" flag 2013-10-08 13:43:14 +02:00
unit-tests cleanup: replace memset with struct initilization 2012-06-22 13:23:03 +02:00
.gitignore gitignore: Ignore files ending in ~ 2012-06-11 16:13:02 +01:00
aclocal.m4 Add aclocal.m4 (for pkgconfig). 2011-01-07 16:27:05 +00:00
configure configure: autoreconf 2013-07-31 15:59:05 +02:00
configure.in libdm: Link to libpthread unconditionally. 2013-10-10 00:34:35 +02:00
COPYING Outline docs 2001-12-31 16:12:40 +00:00
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 Makefiles: Fix CC variable override. 2013-09-16 19:57:14 +01:00
Makefile.in Makefile: add missing deps 2013-09-23 12:13:51 +02:00
README Rename git report from LVM2.git to lvm2.git. 2012-06-08 17:41:43 +01:00
VERSION post-release 2013-10-04 14:41:32 +01:00
VERSION_DM post-release 2013-10-04 14:41:32 +01:00
WHATS_NEW thin: fix lvconvert for active pool. 2013-10-16 10:53:01 +02:00
WHATS_NEW_DM libdm: fix races with udev 2013-10-17 11:57:33 +02:00

README 

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

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://sources.redhat.com/pub/lvm2/

The source code is stored in git:
  http://git.fedorahosted.org/git/lvm2.git
  git clone git://git.fedorahosted.org/git/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/linux-lvm

  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

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