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drbd - Distributed Redundant Block Device driver for Linux…  more info»

ChangeLog

Latest:
------
 For even more detail, use "git log" or visit http://git.drbd.org/.

8.0.16 (api:86/proto:86)
--------
 * Fixed the init script to work with all flavors of LSB

8.0.15 (api:86/proto:86)
--------
 * Adding a missing range check in ensure_mdev()
 * Fix for several potential memory leaks when allocating a device (Bugz 135)
 * Fixed error code pathes in request processing (Bugz 149)
 * Fixed an minor issue with the exposed data UUID logic (Bugz 164)
 * Fixed tight attach/detach loops (Bugz 171)
 * Fixed drbdadm adjust, when a running config contains "--discard-my-data" (Bugz 201)
 * Fix stack smashing in drbdmeta
 * Adding a missing range check in ensure_mdev() (Bugz 199)
 * Compatibility with Linux 2.6.27 and 2.6.28

8.0.14 (api:86/proto:86)
--------
 * fixed some access-after-free corner cases
 * fixed some potential deadlocks on state changes
 * don't use bounce buffers (reduce unnecessary buffer page bounces on 32bit)
 * properly serialize IO operations on the whole bitmap
 * reduce race possibilities in our thread restart code
 * linux 2.6.27 compatibility
 * latency improvements using TCP_QUICKACK
 * reduced spurious coding differrences between drbd-8.0 and drbd-8.2
 * drbdsetup now checks for /proc/drbd instead of playing netlink ping-pong
   to determin whether the drbd kernel module is present.
 * fixed (harmless but annoying) stack corruption in drbdadm
 * adjusted timeouts on 'detach' and 'down'
 * fixed unit conversion of disk size configuration parameter
 * fixed drbdadm/drbdsetup default unit mismatch
   for disk size configuration parameter
 * drbd.spec file update
 * documentation update

8.0.13 (api:86/proto:86)
--------
 * Fixed online resizing if there is application IO on the fly when the
   resize is triggered.
 * Fixed online resizing if it is triggered from the secondary node.
 * Fixed a possible deadlock in case "become-primary-on-both" is used, and
   a resync starts
 * Fixed the invocation of the pri-on-incon-degr handler
 * Fixed the exit codes of drbdsetup
 * sock_create_lite() to avoid a socket->sk leak
 * Auto-tune socket buffers if sndbuf-size is set to zero
 * Made it to compile on Linux-2.6.26

8.0.12 (api:86/proto:86)
--------
 * Corrected lock-out of application IO during bitmap IO.
   (Only triggered issues with multi-terrabyte volumes)
 * If an attach would causes a split-brain,
   abort the attach, do not drop the connection
 * A node without data (no disk, no connection) only accepts data
   (attach or connect) if that data matches the last-known data
 * Fixed various race conditions between state transitions
 * Various bugfixes to issues found by using the sparse tool
 * Corrected the exit codes of drbdsetup/drbdadm to match
   the expectations of dopd (drbd-outdate-peer-daemon)
 * Corrected the online changing of the number of AL extents while
   application IO is in flight.
 * Two new config options no-disk-flushes and no-md-flushes to disable
   the use of io subsystem flushes and barrier BIOs.
 * Make it compile on Linux-2.6.25
 * Support for standard disk stats
 * Work on stalling issues of the resync process
 * drbdsetup /dev/drbdX down no longer fails for non-existing minors
 * Added wipe-md to drbdadm

8.0.11 (api:86/proto:86)
--------
 * If we had no IO while a device was connected it could happen that
   the pending count was erroneously decreased to -1 at disconnect.
   Fixed.
 * Fixed a race that could deadlock worker and receiver while
   disconnecting a diskless node from a primary peer.
 * Fixed a minimal meory leak, upon each module unload of DRBD.

8.0.10 (api:86/proto:86)
--------
 * Fixed a race condition in the disconnect code path that could cause
   the pending count to not return to zero. This means that the
   next role change will block forever.

8.0.9 (api:86/proto:86)
--------
 * In case our backing devices support write barriers and cache
   flushes, we use these means to ensure data integrity in
   the presence of volatile disk write caches and power outages.
 * Fixed DRBD to no longer log
   "Sync bitmap getting lost (drbd_bm_set_bits_in_irq: (!b->bm))"
   endlessly after the local disk was lost.
 * Fixed protocol A for BIOs larger than the page size. If you
   hit the bug, DBBD would simply lose connection.
 * Don't accidentally truncate the device in case a secondary with
   a too small disk gets connected.
 * Changed state processing so that state changes visible
   via the drbdsetup events interface are always in the right order.
 * Made drbddisk's exit codes more LSB compliant.
 * Back-ported the new drbdmeta to drbd-8.0 (from drbd-8.2).
 * More robustness to the code that establishes connections.
 * Made '/etc/init.d/drbd status' to print a nice overview.
 * Made it to compile on Linux-2.6.24.

8.0.8 (api:86/proto:86)
--------
 * Improvements to the bitmap code. (The old code might reenabled
   interrupts by accident)
 * Fixed a endian issue in the wirte protocol. C bit-fields are
   might by layed out differently on little/big endian machines.
 * Drbdadm's adjust forgot sometimes to adjust options values that
   where inherited from the common section, fixed that.
 * Removed dopd. It gets (and should be) shipped with heartbeat.
 * When peer authentication is enabled, you could trick drbd to send
   a state report packet before it authenticated itself. Fixed that.
 * Added robustness to resync pause/continue.
 * Drbdsetup should not report a random error if no netlink
   answer is received from the drbd module.
 * Fixes to error code pathes. ( drbd_drain_block() and lc_alloc() )
 * Fixed a possible OOPS in case one manages to loose disk and
   network concurrently. (iSCSI disk and network over same switch)
 * Fixed the broadcasting of state change events to userspace.

8.0.7 (api:86/proto:86)
--------
 * Fixed drbdmeta's conversion of 07 style meta data.
 * Handle the failure of vmalloc() in the bitmap code more gracefully.
 * Do not pause resync on unconfigured devices.
 * Added missing piecos of the implementation of the "pri-lost" handler.
 * Added the "split-brain" handler.
 * Drop the network config after failure to authenticate.
 * Made it to compile on Linux-2.6.24-rc1.
 * Fixed an unlikely race that could cause a device to get stuck
   in SyncPause.
 * Online resizing failed to start resync properly (although it
   set up all the meta data correct). Fixed that.
 * Minor improvements to documentation and error messages.

8.0.6 (api:86/proto:86)
--------
 * Fixed DRBD to not deadlock while doing bitmap updates on Linux
   2.6.22 and later.
 * Make it compile on Linux-2.6.22 and later.
 * Removed a hardcoded path to docbook DTDs from our sgml files,
   maybe improving the situation with building the documentation.
 * When a drbd connect attempt gets accepted onto a other program,
   that simply closes the socket, drbd stays for some seconds in the
   "BrokenPipe" network state. When one removed the network
   config during that time, drbd OOPSed. This is fixed now.
 * drbdmeta can now also initialize meta data on meta devices
   smaller than 128MB.
 * Added an explicit NULL argument to our ioctl() calls in drbdmeta.
 * Added scripts/block-drbd, which is a nice way hand over DRBD
   role assignment to Xen, allowing one to do Xen live migrations
   in a sane way.
 * Added scripts/pretty-proc-drbd.sh
 * Added an option to drbd.conf which instructs the init script
   to promote DRBD devices to primary role upon machine start up.

8.0.5 (api:86/proto:86)
--------
 * Changed the default behaviour of the init script. Now the init
   script terminates in case the devices refuse to because they 
   had a split brain. Introduced an option to preserve the old
   behaviour.
 * Fixed a bug where the local_cnt could get imbalanced upon a 
   state change.
 * Fixed an bug in the UUID algorithm, that could lead to both
   sides in cs:WFBitMapT state. It was triggered when the disk
   on the SyncTarget gets detached and attached.
 * Implemented proper size checking on strings that get communicated
   with DRBD's netlink protocol.
 * Changed the maximal length of device names from 32 characters to
   128 characters. (udev based disk names might be very long nowadays)
 * Fixed the after-sb-0pri policies discard-younger/discard-older
 * When the resync speed was changed to a considerably lower 
   value while resync was running, it could happen that we erronously
   decremented the local_cnt too often.
 * Fixed a bug in the UUID code, that caused drbd to erronously report 
   a split brain after changing the role of a diskless node multiple 
   times.
 * Both nodes ended up in SyncSource when a state change occured on 
   one node while the disk state on the other node is in the temporal 
   'Negotiating' state. Fixed got fixed.
 * drbdmeta's parse/scan code for meta-data dumps got fixed for 
   huge devices, and an improved error reporting.
 * drbdadm had difficulties with option values of type string that
   start with an digit. Fixed.
 * Fixed a code path that should it make possible to unload the
   module even in case some of our receive buffers leaked.
 * The usermode helper program is now user definable. It is no
   longer hardcoded set to 'drbdadm'.

8.0.4 (api:86/proto:86)
--------
 * Fixed an OOPS in case you do an invalidate on an diskless device. And
   made invalidates on diskless devices possible by using drbdmeta.
 * Fix for an possbile OOPS in drbd_al_to_on_disk_bm().
 * Fix for a possible OOPS. This issue was triggered when you do an
   attach very soon (ms) after the disk was dropped.
 * Fix for a race condition in receive_state(). Symptom was that the
   resync stalls at 100% on a node.
 * Some block devices fail requests by clearing the BIO_UOTODATE flag
   (that is ok), but not returning an error (that is strange). 
   We now deal with that correctly.
 * Drbdadm's parser will now reject config files with resources with 
   missing "on" sections. (Instead of segfaulting)
 * Init script continues in case the setup of a single resource failes.
 * Improvements to the "drbdsetup events" interface: Updates about
   the resync progress and initial state of all devices if called with "-a".
 * The benchmark/dm program can now also create curstom bandwith loads.

8.0.3 (api:86/proto:86)
--------
 * Fixed a race condition that could cause us to continue to traverse a bio
   after it was freed. (led to an OOPS)
 * Fixed a race condition that could cause us to use members of an ee, after
   it was freed. (led to various weirdness)
 * Language fixes for the man pages.
 * The drbdsetup commands (events, wait-connect,...) release the lock now.
 * Minor fixes and updates to the user land tools and to the peer outdater.

8.0.2 (api:86/proto:86)
--------
 * Removed a bug that could cause an OOPS in drbd_al_to_on_disk_bm()
 * Improved the robustness of the UUID based algorithm that decides
   about the resync direction.
 * Fixed the error handling in case a the open() of a backing
   blockdevice fails.
 * Fixed a race condition that could cause a "drbdadm disconnect" to hang.
 * More verbosity in we can not claim a backing block device.
 * More verbosity and paranoia in the bitmap area.
 * On some vendor kernels 8.0.1 did not load because of kzalloc. fixed.
 * Fault injection can now not only be turned on or off, but can be 
   enabled on a per device basis.
 * Fixed the scripts and files needed to build drbd into a kernel.

8.0.1 (api:86/proto:86)
--------
 * Fixed some race conditions that could trigger an OOPS when the loca disk
   failes and DRBD detaches itself from the failing disk.
 * Added a missing call to drbd_try_outdate_peer().
 * LVM's LVs expose ambiguous queue settings. When a RAID-0 (md) PV is
   used the present a segment size of 64k but at the same time allow only
   8 sectors. Fixed DRBD to deal with that fact corretly.
 * New option "always-asbp" to also use the after-after-split-brain-policy
   handlers, even it is not possible to determine from the UUIDs that
   the data of the two nodes was related in the past.
 * More verbosity in case a bio_add_page() fails.
 * Replaced kmalloc()/memset() with kzmalloc(), and a wrapper for older kernls
 * A fast version of drbd_al_to_on_disk_bm(). This is necessary for short
   (even sub-second) switchover times while having large "al-extents" settings.
 * Fixed drbdadm's array overflows (of on stack objects)
 * drbdsetup can now dump its usage in a XML format
 * New init script for gentoo
 * Fixed Typos in the usage of /proc/sysrq-trigger in the example config.

8.0.0 (api:86/proto:86)
--------
 * No effecitve changes to rc2.

8.0rc2 (api:86/proto:86)
--------
 * Added the well known automagiacally adjust drbd_config.h to
   make drbd compile on every by vendor's backports defaced 
   kernel. ( Linux-2.6.x only of course )
 * Fixed races with starting and finishing resync processes 
   while heavy application IO is going on.
 * Ported DRBD to the new crypto API (and added a emulation of the
   now API on top of the old one for older 2.6.x kernels)
 * Code to perform better on ethernet networks with jumbo
   frames.
 * Bugfixes to our request code (race conditions).
 * Every error code that is returned by drbdsetup has a 
   textual description by now.

8.0rc1 (api:86/proto:85)
--------
 * The drbd-peer-outdater got updated to work in multi node heartbeat
   clusters. (But we still not suceeded to get this into Heartbeat's
   repository accepted.)
 * Fixed resync decission after a crash in a pri-pri cluster.
 * Implemented the ping-timeout option for "sub-second" failover clusters.
 * Implemented all the "violently" options in the reconnect handling.
 * Updated man pages of drbd.conf and drbdsetup.
 * Removed the "self-claiming" on secondary nodes.
 * Fixed an uncountable number of bugs.

8.0pre6 (api:85/proto:85)
--------
 * All panic() calls where removed from DRBD.
 * IO errors while accessing the backing storage device are now handled
   correct.
 * Conflict detection for two primaries is in place and tested.
 * More tracing stuff
 * Lots of bugs found and fixed

8.0pre5 (api:84/proto:83)
--------
 * The request code was completely rewritten.
 * The write conflict detection code for primary-primary is currently
   broken, but will be fixed soon.
 * drbdsetup is no longer based on IOCTL but works now via
   netlink/connector.
 * drbd_panic() is on its way out.
 * A runtime configurable tracing framework got added.
 * A lot of effort was put into finding and fixing bugs.

8.0pre4 (api:83/proto:82)
--------
 * Added the "drbd-peer-outdater" heartbeat plugin.
 * New ("cluster wide") state changes. (Cluster wide serialisation of
   major state changes, like becomming primary, invalidateing a disk etc...)
 * Write requests are now sent by the worker instead out of the process's
   context that calls make_request().
 * The worker thread no longer gets restarted upon loss of connection.
 * A testsuite developed by students of 'FH Hagenberg' was added.

8.0pre3 (api:82/proto:80)
--------
 * Now it works on device mapper (LVM) as well as on "real" block devices.
 * Finally (after years) a sane "drbdadm adjust" imprementation, which is
   really really robust.
 * Fixes for 64bit kernel / 32 bit userland environments
 * Fixes in the sys-v init script
 * Renamed "--do-what-I-say" to "--overwrite-data-of-peer". Hopefully
   people now understand what this option does.

8.0-pre2 (api:81/proto:80)
--------
 * removed the "on-disconnect" and "split-brain-fix" config options and
   added the "fencing" config option instead.
 * Updated all manpages to cover drbd-8.0
 * /proc/drbd shows the whole drbd_state_t, as well the logging of state
   changes shows every field of drbd_state_t now.
 * Deactivated most of the TCQ code for now, since it changed again
   in the mainline kernel.
 * Minor other fixes.

8.0_pre1 (api:80/proto:80)
--------
 * Removed support for Linux-2.4.x
 * Cleanup of the wire protocol.
 * Added optional peer authentication with a shared secret.
 * Consolidated state changes into a central function.
 * Improved, tunable after-split-brain recovery strategies.
 * Always verify all IDs used in the protocol that are used as pointers.
 * Introduced the "outdate" disk state, and commands for managing it.
 * Introduced the "drbdmeta" command, and require the user to create
   meta-data explicitly.
 * Support for primary/primary (for OCFS2, GFS...)
 * Replaced the sync-groups with the sync-after mechanism.
 * The "common" section in the configuration file.
 * Replaced the generation counters (GCs) with data-generation-UUIDs
 * Improved performance by using Linux-2.6's BIOs with up to 32k per
   IO request. Before we transferred only up to 4k per IO request.
 * A Warning if the disk sizes are more than 10% different.
 * A connection teardown packet to differentiate between a crash
   of the peer and a peer that is shut down gracefully.
 * External imposable SyncPause states, to serialize DRBD's resynchronisation
   with the resynchronisation of backing storage's RAID configurations.
 * Backing storage can be hot added to disk less nodes.
 * Prepared for advanced integration to Heartbeat-2.0
 * Changed internal APIs so that missed writes of the meta-data super
   block are reported as they happen.
 * The http://usage.drbd.org sub project.
 * Rewrote the scanner/parser of drbd.conf. 10 times smaller/faster and
   easier to maintain.
 * Asynchronous meta-data IO [ Code drop from the DRBD+ branch ]
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