Add configure option --with-device-nodes-on

[lvm2.git] / WHATS_NEW_DM

Version 1.02.62 - 4th February 2011
===================================
  Add --addnodeonresume and --addnodeoncreate options to dmsetup.
  Add dm_task_set_add_node to libdevmapper to control dev node creation time.
  Add dm_task_secure_data to libdevmapper to wipe ioctl buffers in kernel.
  Log debug message when expected uevent is not generated.
  Only compile memory debugging code when DEBUG_MEM is set.
  Set DM_UDEV_DISABLE_OTHER_RULES_FLAG for suspended DM devices in udev rules.
  Begin a new pool object for each row in _output_as_rows() correctly.

Version 1.02.61 - 10th January 2011
===================================
  Add DM_COOKIE_AUTO_CREATE to libdevmapper.h.
  Export DM_CONTROL_NODE_UMASK and use it while creating /dev/mapper/control.

Version 1.02.60 - 20th December 2010
====================================
  Check for unlink failure in remove_lockfile() in dmeventd.
  Use dm_free for dm_malloc-ed areas in _clog_ctr/_clog_dtr in cmirrord.
  Use char* arithmetic in _process_all() & _targets() in dmsetup.
  Change dm_regex_create() API to accept const char * const *patterns.
  Add new dm_prepare_selinux_context fn to libdevmapper and use it throughout.
  Detect existence of new SELinux selabel interface during configure.

Version 1.02.59 - 6th December 2010
===================================
  Add backtraces to _process_mapper_dir and  _create_and_load_v4 error paths.
  Remove superfluous checks for NULL before calling dm_free.

Version 1.02.58 - 22nd November 2010
====================================
  Fix _output_field crash from field_id free with DEBUG_MEM. (1.02.57)

Version 1.02.57 - 8th November 2010
===================================
  Fix regex optimiser not to ignore RHS of OR nodes in _find_leftmost_common.
  Add dmeventd -R to restart dmeventd without losing monitoring state. (1.02.56)
  Fix memory leak of field_id in _output_field function.
  Allocate buffer for reporting functions dynamically to support long outputs.

Version 1.02.56 - 25th October 2010
===================================
  Return const pointer from dm_basename() in libdevmapper.
  Implement dmeventd -R to restart without state loss.
  Add dm_zalloc and use it and dm_pool_zalloc throughout.
  Add --setuuid to dmsetup rename.
  Add dm_task_set_newuuid to set uuid of mapped device post-creation.

Version 1.02.55 - 24th September 2010
=====================================
  Fix the way regions are marked complete to avoid slow --nosync cmirror I/O.
  Add DM_REPORT_FIELD_TYPE_ID_LEN to libdevmapper.h.

Version 1.02.54 - 18th August 2010
==================================
  Fix dm-mod autoloading logic to not assume control node is set correctly.
  Add dmeventd/executable to lvm.conf to test alternative dmeventd.
  Export dm_event_handler_set_dmeventd_path to override built-in dmeventd path.
  Generate libdevmapper-event exported symbols.
  Remove superfluous NULL pointer tests before dm_free from dmeventd.
  Assume dm-mod autoloading support is in kernel 2.6.36 and higher, not 2.6.35.
  Fix udev rules to support udev database content generated by older rules.
  Reinstate detection of inappropriate uevent with DISK_RO set and suppress it.
  Fix regex ttree off-by-one error.
  Add --enable-valgrind-pool to configure.
  Fix segfault in regex matcher with characters of ordinal value > 127.
  Fix 'void*' arithmetic warnings in dbg_malloc.c and libdm-iface.c.
  Wait for node creation before displaying debug info in dmsetup.
  Fix return status 0 for "dmsetup info -c -o help".
  Add check for kernel semaphore support and disable udev_sync if not available.

Version 1.02.53 - 28th July 2010
================================
  Revert failed table load preparation after "create, load and resume".
  Switch dmeventd to use dm_create_lockfile and drop duplicate code.
  Add dm_create_lockfile to libdm to handle pidfiles for all daemons.
  Replace lookup with next in struct dfa_state & calculate states on demand.
  Improve the regex matcher, reducing the number of charset nodes used.
  Add dm_regex_fingerprint to facilitate regex testing.
  Skip ffs(0) in _test_word in bitset functions.
  Use "nowatch" udev rule for inappropriate devices.

Version 1.02.52 - 6th July 2010
===============================
  Fix dmlosetup snprintf %llu compiler warning.
  Add parentheses to some libdevmapper.h macro arguments.
  Add printf format attributes to dm_{sn,as}printf and fix a caller.
  Move dmeventd man page from install_lvm2 to install_device-mapper. (1.02.50)

Version 1.02.51 - 30th June 2010
================================
  Generate libdevmapper exported symbols from header file.

Version 1.02.50 - 23rd June 2010
================================
  Fix INTERNAL_ERROR typo in ioctl iface unknown task message.
  Fix udev rules to handle spurious events properly.
  Use C99 [] not [0] in dm_ulog_request struct to avoid abort when fortified.
  Allow use of devmapper header file in C++ mode (extern "C" and __typeof__).
  Add dmeventd man page.

Version 1.02.49 - 4th June 2010
===============================
  Support autoloading of dm-mod module for kernels from 2.6.35.
  Document 'clear' in dmsetup man page.
  Fix semctl parameter (union) to avoid misaligned parameter on some arches.
  Add dm_tree_node_set_presuspend_node() to presuspend child when deactivating.
  Initial support for replicator target.

Version 1.02.48 - 17th May 2010
================================
  Use -d to control level of messages sent to syslog by dmeventd.
  Change -d to -f to run dmeventd in foreground.
  Do not print encryption key in message debug output (cryptsetup luksResume).
  Fix dmeventd static build library dependencies.
  Fix udev flags on remove in create_and_load error path.

Version 1.02.47 - 30th April 2010
=================================
  Add support for new IMPORT{db} udev rule.
  Add DM_UDEV_PRIMARY_SOURCE_FLAG udev flag to recognize proper DM events.
  Also include udev libs in libdevmapper.pc when udev_sync is enabled.
  Cache bitset locations to speed up _calc_states.
  Add a regex optimisation pass for shared prefixes and suffixes.
  Add dm_bit_and and dm_bitset_equal to libdevmapper.
  Simplify dm_bitset_create.
  Speed up dm_bit_get_next with ffs().

Version 1.02.46 - 14th April 2010
=================================
  Change dm_tree_deactivate_children to fail if device is open.
  Wipe memory buffers for dm-ioctl parameters before releasing.
  Strictly require libudev if udev_sync is used.
  Add support for ioctl's DM_UEVENT_GENERATED_FLAG.

Version 1.02.45 - 9th March 2010
================================
  Add --showkeys parameter description to dmsetup man page.
  Add --help option as synonym for help command.

Version 1.02.44 - 15th February 2010
====================================
  Add DM_UDEV_DISABLE_LIBRARY_FALLBACK udev flag to rely on udev only.
  Export dm_udev_create_cookie function to create new cookies on demand.
  Add --udevcookie, udevcreatecookie and udevreleasecookie to dmsetup.
  Set udev state automatically instead of using DM_UDEV_DISABLE_CHECKING.

Version 1.02.43 - 21st January 2010
===================================
  Remove bitset, hash and pool headers superceded by libdevmapper.h.
  Fix off-by-one error causing bad cluster mirror table construction.

Version 1.02.42 - 14th January 2010
===================================
  Add support for the "snapshot-merge" kernel target (2.6.33-rc1).
  Introduce a third activation_priority level in dm_tree_activate_children.

Version 1.02.41 - 12th January 2010
===================================
  If DM_UDEV_DISABLE_CHECKING is set in environment, disable udev warnings.
  Add dm_tree_add_dev_with_udev_flags to provide wider support for udev flags.
  Add --noudevrules option for dmsetup to disable /dev node management by udev.
  Fix 'dmsetup info -c -o all' to show all fields.
  Return errors if dm_tree_*_children functions fail.
  Fix coredump and memory leak for 'dmsetup help -c'.
  Disable udev rules for change events with DISK_RO set.

Version 1.02.40 - 19th November 2009
====================================
  Fix install_device-mapper Makefile target to not build dmeventd plugins.
  Support udev flags even when udev_sync is disabled or not compiled in.
  Remove 'last_rule' from udev rules: honour DM_UDEV_DISABLE_OTHER_RULES_FLAG.
  Add dmsetup --inactive support.
  Add dm_task_query_inactive_table to libdevmapper for kernel driver >= 4.16.
  Fix hash lookup segfault when keys compared are different lengths.

Version 1.02.39 - 26th October 2009
===================================
  Remove strict default permissions for DM devices from 95-dm-notify.rules.
  Add dmsetup udevflags command to decode udev flags in given cookie value.
  Support udev flags in libdevmapper incl. dm_tree_add_new_dev_with_udev_flags.
  Make libdm ABI consistent when built with/without selinux support.

Version 1.02.38 - 25th September 2009
=====================================
  Export DM_DEV_DIR_UMASK, the default umask for /dev directories created.
  Handle any path supplied to dm_task_set_name by looking up in /dev/mapper.
  Add several examples to 12-dm-permissions.rules.
  Add splitname and --yes to dmsetup man page.
  Fix _mirror_emit_segment_line return code.
  Fix dmeventd _temporary_log_fn parameters. (2.02.50)

Version 1.02.37 - 15th September 2009
=====================================
  Add dmsetup manpage entries for udevcomplete_all and udevcookies.
  Check udev is running when processing cookies and retain state internally.
  Add y|--yes option to dmsetup for default 'yes' answer to prompts.
  Fix tools Makefile to process dmsetup sources separately.
  Restore umask when device node creation fails.
  Check kernel vsn to use 'block_on_error' or 'handle_errors' in mirror table.
  Add dm-log-userspace.h to tree for cmirrord builds.

Version 1.02.36 - 6th August 2009
=================================
  Add udevcookies, udevcomplete, udevcomplete_all and --noudevwait to dmsetup.
  Add libdevmapper functions to support synchronisation with udev.

Version 1.02.35 - 28th July 2009
================================
  Add LOG_LINE_WITH_ERRNO macro.
  Use log_error macro consistently throughout in place of log_err.

Version 1.02.34 - 15th July 2009
================================
  Use _exit() not exit() after forking to avoid flushing libc buffers twice.
  Rename plog macro to LOG_LINE & add LOG_MESG variant for dm_dump_memory_debug.
  Change plog to use dm_log_with_errno unless deprecated dm_log_init was used.
  Add dm_log_with_errno and dm_log_with_errno_init, deprecating the old fns.
  Fix whitespace in linear target line to fix identical table line detection.
  Add device number to more log messages during activation.

Version 1.02.33 - 30th June 2009
================================
  Don't fallback to default major number: use dm_task_set_major_minor. (1.02.31)
  Do not fork daemon when dmeventd cannot be found.
  Add crypt target handling to libdevmapper tree nodes.
  Add splitname command to dmsetup.
  Add subsystem, vg_name, lv_name, lv_layer fields to dmsetup reports.
  Make mempool optional in dm_split_lvm_name().

Version 1.02.32 - 21st May 2009
===============================
  Only generate libdevmapper.a when configured to link statically.
  Export dm_tree_node_size_changed() from libdevmapper.
  Propagate the table size_changed property up the dm device tree.
  Detect failure to free memory pools when releasing the library.
  Fix segfault when getopt processes dmsetup -U, -G and -M options.

Version 1.02.31 - 3rd March 2009
================================
  If kernel supports only one dm major number, use in place of any supplied.

Version 1.02.30 - 26th January 2009
====================================
  Add "all" field to reports expanding to all fields of report type.
  Enforce device name length and character limitations in libdm.
  Replace _dm_snprintf with EMIT_PARAMS macro for creating target lines.

Version 1.02.29 - 10th November 2008
====================================
  Merge device-mapper into the LVM2 tree.
  Split out dm-logging.h from log.h.
  Use lvm-types.h.
  Add usrsbindir to configure.

Version 1.02.28 - 18th September 2008
=====================================
  Only resume devices in dm_tree_preload_children if size changes.
  Extend deptree buffers so the largest possible device numbers fit.
  Generate versioned libdevmapper-event.so.
  Underline longer report help text headings.

Version 1.02.27 - 25th June 2008
================================
  Align struct memblock in dbg_malloc for sparc.
  Add --unquoted and --rows to dmsetup.
  Avoid compiler warning about cast in dmsetup.c's OFFSET_OF macro.
  Fix inverted no_flush debug message.
  Remove --enable-jobs from configure. (Set at runtime instead.)
  Bring configure.in and list.h into line with the lvm2 versions.

Version 1.02.26 - 6th June 2008
===============================
  Initialise params buffer to empty string in _emit_segment.
  Skip add_dev_node when ioctls disabled.
  Make dm_hash_iter safe against deletion.
  Accept a NULL pointer to dm_free silently.
  Add tables_loaded, readonly and suspended columns to reports.
  Add --nameprefixes to dmsetup.
  Add field name prefix option to reporting functions.
  Calculate string size within dm_pool_grow_object.

Version 1.02.25 - 10th April 2008
=================================
  Remove redundant if-before-free tests.
  Use log_warn for reporting field help text instead of log_print.
  Change cluster mirror log type name (s/clustered_/clustered-/)

Version 1.02.24 - 20th December 2007
====================================
  Fix deptree to pass new name to _resume_node after a rename.
  Suppress other node operations if node is deleted.
  Add node operation stack debug messages.
  Report error when empty device name passed to readahead functions.
  Fix minimum readahead debug message.

Version 1.02.23 - 5th December 2007
===================================
  Update dm-ioctl.h after removal of compat code.
  Add readahead support to libdevmapper and dmsetup.
  Fix double free in a libdevmapper-event error path.
  Fix configure --with-dmeventd-path substitution.
  Allow a DM_DEV_DIR environment variable to override /dev in dmsetup.
  Create a libdevmapper.so.$LIB_VERSION symlink within the build tree.
  Avoid static link failure with some SELinux libraries that require libpthread.
  Remove obsolete dmfs code from tree and update INSTALL.

Version 1.02.22 - 21st August 2007
==================================
  Fix inconsistent licence notices: executables are GPLv2; libraries LGPLv2.1.
  Update to use autoconf 2.61, while still supporting 2.57.
  Avoid repeated dm_task free on some dm_event_get_registered_device errors.
  Introduce log_sys_* macros from LVM2.
  Export dm_fclose and dm_create_dir; remove libdm-file.h.
  Don't log EROFS mkdir failures in _create_dir_recursive (for LVM2).
  Add fclose wrapper dm_fclose that catches write failures (using ferror).

Version 1.02.21 - 13th July 2007
================================
  Introduce _LOG_STDERR to send log_warn() messages to stderr not stdout.
  Fix dmsetup -o devno string termination. (1.02.20)

Version 1.02.20 - 15th June 2007
================================
  Fix default dmsetup report buffering and add --unbuffered.
  Add tree-based and dependency fields to dmsetup reports.

Version 1.02.19 - 27th April 2007
=================================
  Standardise protective include file #defines.
  Add regex functions to library.
  Avoid trailing separator in reports when there are hidden sort fields.
  Fix segfault in 'dmsetup status' without --showkeys against crypt target.
  Deal with some more compiler warnings.
  Introduce _add_field() and _is_same_field() to libdm-report.c.
  Fix some libdevmapper-event and dmeventd memory leaks.
  Remove unnecessary memset() return value checks.
  Fix a few leaks in reporting error paths. [1.02.15+]

Version 1.02.18 - 13th February 2007
====================================
  Improve dmeventd messaging protocol: drain pipe and tag messages.

Version 1.02.17 - 29th January 2007
===================================
  Add recent reporting options to dmsetup man page.
  Revise some report fields names.
  Add dmsetup 'help' command and update usage text.
  Use fixed-size fields in report interface and reorder.

Version 1.02.16 - 25th January 2007
===================================
  Add some missing close() and fclose() return value checks.
  Migrate dmsetup column-based output over to new libdevmapper report framework.
  Add descriptions to reporting field definitions.
  Add a dso-private variable to dmeventd dso interface.
  Add dm_event_handler_[gs]et_timeout functions.
  Streamline dm_report_field_* interface.
  Add cmdline debug & version options to dmeventd.
  Add DM_LIB_VERSION definition to configure.h.
  Suppress 'Unrecognised field' error if report field is 'help'.
  Add --separator and --sort to dmsetup (unused).
  Make alignment flag optional when specifying report fields.

Version 1.02.15 - 17th January 2007
===================================
  Add basic reporting functions to libdevmapper.
  Fix a malloc error path in dmsetup message.
  More libdevmapper-event interface changes and fixes.
  Rename dm_saprintf() to dm_asprintf().
  Report error if NULL pointer is supplied to dm_strdup_aux().
  Reinstate dm_event_get_registered_device.

Version 1.02.14 - 11th January 2007
===================================
  Add dm_saprintf().
  Use CFLAGS when linking so mixed sparc builds can supply -m64.
  Add dm_tree_use_no_flush_suspend().
  Lots of dmevent changes including revised interface.
  Export dm_basename().
  Cope with a trailing space when comparing tables prior to possible reload.
  Fix dmeventd to cope if monitored device disappears.

Version 1.02.13 - 28 Nov 2006
=============================
  Update dmsetup man page (setgeometry & message).
  Fix dmsetup free after getline with debug.
  Suppress encryption key in 'dmsetup table' output unless --showkeys supplied.

Version 1.02.12 - 13 Oct 2006
=============================
  Avoid deptree attempting to suspend a device that's already suspended.

Version 1.02.11 -  12 Oct 2006
==============================
  Add suspend noflush support.
  Add basic dmsetup loop support.
  Switch dmsetup to use dm_malloc and dm_free.

Version 1.02.10 - 19 Sep 2006
=============================
  Add dm_snprintf(), dm_split_words() and dm_split_lvm_name() to libdevmapper.
  Reorder mm bounds_check code to reduce window for a dmeventd race.

Version 1.02.09 - 15 Aug 2006
=============================
  Add --table argument to dmsetup for a one-line table.
  Abort if errors are found during cmdline option processing.
  Add lockfs indicator to debug output.

Version 1.02.08 - 17 July 2006
==============================
  Append full patch to check in emails.
  Avoid duplicate dmeventd subdir with 'make distclean'.
  Update dmsetup man page.
  Add --force to dmsetup remove* to load error target.
  dmsetup remove_all also performs mknodes.
  Don't suppress identical table reloads if permission changes.
  Fix corelog segment line.
  Suppress some compiler warnings.

Version 1.02.07 - 11 May 2006
=============================
  Add DM_CORELOG flag to dm_tree_node_add_mirror_target().
  Avoid a dmeventd compiler warning.

Version 1.02.06 - 10 May 2006
=============================
  Move DEFS into configure.h.
  Fix leaks in error paths found by coverity.
  Remove dmsetup line buffer limitation.

Version 1.02.05 - 19 Apr 2006
=============================
  Separate install_include target in makefiles.
  Separate out DEFS from CFLAGS.
  Support pkg-config.
  Check for libsepol.

Version 1.02.04 - 14 Apr 2006
=============================
  Bring dmsetup man page up-to-date.
  Use name-based device refs if kernel doesn't support device number refs.
  Fix memory leak (struct dm_ioctl) when struct dm_task is reused.
  If _create_and_load_v4 fails part way through, revert the creation.
  dmeventd thread/fifo fixes.
  Add file & line to dm_strdup_aux().
  Add setgeometry.

Version 1.02.03 - 7 Feb 2006
============================
  Add exported functions to set uid, gid and mode.
  Rename _log to dm_log and export.
  Add dm_tree_skip_lockfs.
  Fix dm_strdup debug definition.
  Fix hash function to avoid using a negative array offset.
  Don't inline _find in hash.c and tidy signed/unsigned etc.
  Fix libdevmapper.h #endif.
  Fix dmsetup version driver version.
  Add sync, nosync and block_on_error mirror log parameters.
  Add hweight32.
  Fix dmeventd build.

Version 1.02.02 - 2 Dec 2005
============================
  dmeventd added.
  Export dm_task_update_nodes.
  Use names instead of numbers in messages when ioctls fail.

Version 1.02.01 - 23 Nov 2005
=============================
  Resume snapshot-origins last.
  Drop leading zeros from dm_format_dev.
  Suppress attempt to reload identical table.
  Additional LVM- prefix matching for transitional period.

Version 1.02.00 - 10 Nov 2005
=============================
  Added activation functions to library.
  Added return macros.
  Also suppress error if device doesn't exist with DM_DEVICE_STATUS.
  Export dm_set_selinux_context().
  Add dm_driver_version().
  Added dependency tree functions to library.
  Added hash, bitset, pool, dbg_malloc to library.
  Added ls --tree to dmsetup.
  Added dmsetup --nolockfs support for suspend/reload.

Version 1.01.05 - 26 Sep 2005
=============================
  Resync list.h with LVM2.
  Remember increased buffer size and use for subsequent calls.
  On 'buffer full' condition, double buffer size and repeat ioctl.
  Fix termination of getopt_long() option array.
  Report 'buffer full' condition with v4 ioctl as well as with v1.

Version 1.01.04 - 2 Aug 2005
============================
  Fix dmsetup ls -j and status --target with empty table.

Version 1.01.03 - 13 Jun 2005
=============================
  Use matchpathcon mode parameter.
  Fix configure script to re-enable selinux.

Version 1.01.02 - 17 May 2005
=============================
  Call dm_lib_exit() and dm_lib_release() automatically now.
  Add --target <target_type> filter to dmsetup table/status/ls.
  Add --exec <command> to dmsetup ls.
  Fix dmsetup getopt_long usage.

Version 1.01.01 - 29 Mar 2005
=============================
  Update dmsetup man page.
  Drop-in devmap_name replacement.
  Add option to compile without ioctl for testing.
  Fix DM_LIB_VERSION sed.

Version 1.01.00 - 17 Jan 2005
=============================
  Add dm_task_no_open_count() to skip getting open_count.

Version 1.00.21 - 7 Jan 2005
============================
  Fix /proc/devices parsing.

Version 1.00.20 - 6 Jan 2005
============================
  Attempt to fix /dev/mapper/control transparently if it's wrong.
  Configuration-time option for setting uid/gid/mode for /dev/mapper nodes.
  Update kernel patches for 2.4.27/2.4.28-pre-4 (includes minor fixes).
  Add --noheadings columns option for colon-separated dmsetup output.
  Support device referencing by uuid or major/minor.
  Warn if kernel data didn't fit in buffer.
  Fix a printf.

Version 1.00.19 - 3 July 2004
=============================
  More autoconf fixes.
  Fix a dmsetup newline.
  Fix device number handling for 2.6 kernels.

Version 1.00.18 - 20 Jun 2004
=============================
  Fix a uuid free in libdm-iface.
  Fix a targets string size calc in driver.
  Add -c to dmsetup for column-based output.
  Add target message-passing ioctl.

Version 1.00.17 - 17 Apr 2004
=============================
  configure --with-owner= --with-group= to avoid -o and -g args to 'install'
  Fix library selinux linking.

Version 1.00.16 - 16 Apr 2004
=============================
  Ignore error setting selinux file context if fs doesn't support it.

Version 1.00.15 - 7 Apr 2004
============================
  Fix status overflow check in kernel patches.

Version 1.00.14 - 6 Apr 2004
============================
  Fix static selinux build.

Version 1.00.13 - 6 Apr 2004
============================
  Add some basic selinux support.

Version 1.00.12 - 6 Apr 2004
============================
  Fix dmsetup.static install.

Version 1.00.11 - 5 Apr 2004
============================
  configure --enable-static_link does static build in addition to dynamic.
  Moved Makefile library targets definition into template.

Version 1.00.10 - 2 Apr 2004
============================
  Fix DESTDIR handling.
  Static build installs to dmsetup.static.
  Basic support for internationalisation.
  Minor Makefile tidy-ups/fixes.

Version 1.00.09 - 31 Mar 2004
=============================
  Update copyright notices to Red Hat.
  Move full mknodes functionality from dmsetup into libdevmapper.
  Avoid sscanf %as for uClibc compatibility.
  Cope if DM_LIST_VERSIONS is not defined.
  Add DM_LIST_VERSIONS functionality to kernel patches.
  Generate new kernel patches for 2.4.26-rc1.

Version 1.00.08 - 27 Feb 2004
=============================
  Added 'dmsetup targets'.
  Added event_nr support to 'dmsetup wait'.
  Updated dmsetup man page.
  Allow logging function to be reset to use internal one.
  Bring log macros in line with LVM2 ones.
  Added 'make install_static_lib' which installs libdevmapper.a.
  Made configure/makefiles closer to LVM2 versions.
  Fixed DESTDIR for make install/install_static_lib.
  Updated README/INSTALL to reflect move to sources.redhat.com.
  Updated autoconf files to 2003-06-17.