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path: root/drivers/block/drbd/drbd_req.h
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* drbd: introduce WRITE_SAME supportLars Ellenberg2016-06-13
| | | | | | | | | | | | | | | We will support WRITE_SAME, if * all peers support WRITE_SAME (both in kernel and DRBD version), * all peer devices support WRITE_SAME * logical_block_size is identical on all peers. We may at some point introduce a fallback on the receiving side for devices/kernels that do not support WRITE_SAME, by open-coding a submit loop. But not yet. Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com> Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com> Signed-off-by: Jens Axboe <axboe@fb.com>
* drbd: De-inline drbd_should_do_remote() and drbd_should_send_out_of_sync()Andreas Gruenbacher2015-11-25
| | | | | | | | | There is no need to have these two as inline functions. In addition, drbd_should_send_out_of_sync() is only used in a single place, anyway. Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com> Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com> Signed-off-by: Jens Axboe <axboe@fb.com>
* drbd: silence -Wmissing-prototypes warningsLars Ellenberg2014-07-10
| | | | | Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com> Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
* drbd: prepare sending side for REQ_DISCARDLars Ellenberg2014-04-30
| | | | | | | | | | Note that I do NOT call __drbd_chk_io_error for failed REQ_DISCARD. That may be wrong, though, or needs to differ between EOPNOTSUPP and other errors... Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com> Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com> Signed-off-by: Jens Axboe <axboe@fb.com>
* drbd: Remove drbd_wrappers.hPhilipp Reisner2014-04-30
| | | | | | Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com> Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com> Signed-off-by: Jens Axboe <axboe@fb.com>
* drbd: Create a dedicated struct drbd_device_workAndreas Gruenbacher2014-02-17
| | | | | | | | | | | | drbd_device_work is a work item that has a reference to a device, while drbd_work is a more generic work item that does not carry a reference to a device. All callbacks get a pointer to a drbd_work instance, those callbacks that expect a drbd_device_work use the container_of macro to get it. Signed-off-by: Andreas Gruenbacher <agruen@linbit.com> Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com>
* drbd: Move conf_mutex from connection to resourceAndreas Gruenbacher2014-02-17
| | | | | Signed-off-by: Andreas Gruenbacher <agruen@linbit.com> Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com>
* drbd: Introduce "peer_device" object between "device" and "connection"Andreas Gruenbacher2014-02-17
| | | | | | | | | | | | | In a setup where a device (aka volume) can replicate to multiple peers and one connection can be shared between multiple devices, we need separate objects to represent devices on peer nodes and network connections. As a first step to introduce multiple connections per device, give each drbd_device object a single drbd_peer_device object which connects it to a drbd_connection object. Signed-off-by: Andreas Gruenbacher <agruen@linbit.com> Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com>
* drbd: Rename drbd_tconn -> drbd_connectionAndreas Gruenbacher2014-02-17
| | | | | | | sed -i -e 's:all_tconn:connections:g' -e 's:tconn:connection:g' Signed-off-by: Andreas Gruenbacher <agruen@linbit.com> Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com>
* drbd: Rename "mdev" to "device"Andreas Gruenbacher2014-02-17
| | | | | | | sed -i -e 's:mdev:device:g' Signed-off-by: Andreas Gruenbacher <agruen@linbit.com> Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com>
* drbd: Rename struct drbd_conf -> struct drbd_deviceAndreas Gruenbacher2014-02-17
| | | | | | | sed -i -e 's:\<drbd_conf\>:drbd_device:g' Signed-off-by: Andreas Gruenbacher <agruen@linbit.com> Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com>
* block: Abstract out bvec iteratorKent Overstreet2013-11-23
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Immutable biovecs are going to require an explicit iterator. To implement immutable bvecs, a later patch is going to add a bi_bvec_done member to this struct; for now, this patch effectively just renames things. Signed-off-by: Kent Overstreet <kmo@daterainc.com> Cc: Jens Axboe <axboe@kernel.dk> Cc: Geert Uytterhoeven <geert@linux-m68k.org> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Paul Mackerras <paulus@samba.org> Cc: "Ed L. Cashin" <ecashin@coraid.com> Cc: Nick Piggin <npiggin@kernel.dk> Cc: Lars Ellenberg <drbd-dev@lists.linbit.com> Cc: Jiri Kosina <jkosina@suse.cz> Cc: Matthew Wilcox <willy@linux.intel.com> Cc: Geoff Levand <geoff@infradead.org> Cc: Yehuda Sadeh <yehuda@inktank.com> Cc: Sage Weil <sage@inktank.com> Cc: Alex Elder <elder@inktank.com> Cc: ceph-devel@vger.kernel.org Cc: Joshua Morris <josh.h.morris@us.ibm.com> Cc: Philip Kelleher <pjk1939@linux.vnet.ibm.com> Cc: Rusty Russell <rusty@rustcorp.com.au> Cc: "Michael S. Tsirkin" <mst@redhat.com> Cc: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> Cc: Jeremy Fitzhardinge <jeremy@goop.org> Cc: Neil Brown <neilb@suse.de> Cc: Alasdair Kergon <agk@redhat.com> Cc: Mike Snitzer <snitzer@redhat.com> Cc: dm-devel@redhat.com Cc: Martin Schwidefsky <schwidefsky@de.ibm.com> Cc: Heiko Carstens <heiko.carstens@de.ibm.com> Cc: linux390@de.ibm.com Cc: Boaz Harrosh <bharrosh@panasas.com> Cc: Benny Halevy <bhalevy@tonian.com> Cc: "James E.J. Bottomley" <JBottomley@parallels.com> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: "Nicholas A. Bellinger" <nab@linux-iscsi.org> Cc: Alexander Viro <viro@zeniv.linux.org.uk> Cc: Chris Mason <chris.mason@fusionio.com> Cc: "Theodore Ts'o" <tytso@mit.edu> Cc: Andreas Dilger <adilger.kernel@dilger.ca> Cc: Jaegeuk Kim <jaegeuk.kim@samsung.com> Cc: Steven Whitehouse <swhiteho@redhat.com> Cc: Dave Kleikamp <shaggy@kernel.org> Cc: Joern Engel <joern@logfs.org> Cc: Prasad Joshi <prasadjoshi.linux@gmail.com> Cc: Trond Myklebust <Trond.Myklebust@netapp.com> Cc: KONISHI Ryusuke <konishi.ryusuke@lab.ntt.co.jp> Cc: Mark Fasheh <mfasheh@suse.com> Cc: Joel Becker <jlbec@evilplan.org> Cc: Ben Myers <bpm@sgi.com> Cc: xfs@oss.sgi.com Cc: Steven Rostedt <rostedt@goodmis.org> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Ingo Molnar <mingo@redhat.com> Cc: Len Brown <len.brown@intel.com> Cc: Pavel Machek <pavel@ucw.cz> Cc: "Rafael J. Wysocki" <rjw@sisk.pl> Cc: Herton Ronaldo Krzesinski <herton.krzesinski@canonical.com> Cc: Ben Hutchings <ben@decadent.org.uk> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Guo Chao <yan@linux.vnet.ibm.com> Cc: Tejun Heo <tj@kernel.org> Cc: Asai Thambi S P <asamymuthupa@micron.com> Cc: Selvan Mani <smani@micron.com> Cc: Sam Bradshaw <sbradshaw@micron.com> Cc: Wei Yongjun <yongjun_wei@trendmicro.com.cn> Cc: "Roger Pau Monné" <roger.pau@citrix.com> Cc: Jan Beulich <jbeulich@suse.com> Cc: Stefano Stabellini <stefano.stabellini@eu.citrix.com> Cc: Ian Campbell <Ian.Campbell@citrix.com> Cc: Sebastian Ott <sebott@linux.vnet.ibm.com> Cc: Christian Borntraeger <borntraeger@de.ibm.com> Cc: Minchan Kim <minchan@kernel.org> Cc: Jiang Liu <jiang.liu@huawei.com> Cc: Nitin Gupta <ngupta@vflare.org> Cc: Jerome Marchand <jmarchand@redhat.com> Cc: Joe Perches <joe@perches.com> Cc: Peng Tao <tao.peng@emc.com> Cc: Andy Adamson <andros@netapp.com> Cc: fanchaoting <fanchaoting@cn.fujitsu.com> Cc: Jie Liu <jeff.liu@oracle.com> Cc: Sunil Mushran <sunil.mushran@gmail.com> Cc: "Martin K. Petersen" <martin.petersen@oracle.com> Cc: Namjae Jeon <namjae.jeon@samsung.com> Cc: Pankaj Kumar <pankaj.km@samsung.com> Cc: Dan Magenheimer <dan.magenheimer@oracle.com> Cc: Mel Gorman <mgorman@suse.de>6
* drbd: only fail empty flushes if no good data is reachableLars Ellenberg2013-03-28
| | | | | | | | | | | | | We completed empty flushes (blkdev_issue_flush()) with IO error if we lost the local disk, even if we still have an established replication link to a healthy remote disk. Fix this to only report errors to upper layers, if neither local nor remote data is reachable. Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com> Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com> Signed-off-by: Jens Axboe <axboe@kernel.dk>
* drbd: fix potential protocol error and resulting disconnect/reconnectLars Ellenberg2013-01-21
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | When we notice a disk failure on the receiving side, we stop sending it new incoming writes. Depending on exact timing of various events, the same transfer log epoch could end up containing both replicated (before we noticed the failure) and local-only requests (after we noticed the failure). The sanity checks in tl_release(), called when receiving a P_BARRIER_ACK, check that the ack'ed transfer log epoch matches the expected epoch, and the number of contained writes matches the number of ack'ed writes. In this case, they counted both replicated and local-only writes, but the peer only acknowledges those it has seen. We get a mismatch, resulting in a protocol error and disconnect/reconnect cycle. Messages logged are "BAD! BarrierAck #%u received with n_writes=%u, expected n_writes=%u!\n" A similar issue can also be triggered when starting a resync while having a healthy replication link, by invalidating one side, forcing a full sync, or attaching to a diskless node. Fix this by closing the current epoch if the state changes in a way that would cause the replication intent of the next write. Epochs now contain either only non-replicated, or only replicated writes. Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com> Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
* drbd: disambiguation, s/P_DISCARD_WRITE/P_SUPERSEDED/Lars Ellenberg2012-11-09
| | | | | | | | | | | | To avoid confusion with REQ_DISCARD aka TRIM, rename our "discard concurrent write acks" from P_DISCARD_WRITE to P_SUPERSEDED. At the same time, rename the drbd request event DISCARD_WRITE to CONFLICT_RESOLVED. It already triggers both successful completion or restart of the request, depending on our RQ_POSTPONED flag. Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com> Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
* drbd: allow read requests to be retried after force-detachLars Ellenberg2012-11-08
| | | | | | | | | | | | | | | | | | | | | Sometimes, a lower level block device turns into a tar-pit, not completing requests at all, not even doing error completion. We can force-detach from such a tar-pit block device, either by disk-timeout, or by drbdadm detach --force. Queueing for retry only from the request destruction path (kref hit 0) makes it impossible to retry affected read requests from the peer, until the local IO completion happened, as the locally submitted bio holds a reference on the drbd request object. If we can only complete READs when the local completion finally happens, we would not need to force-detach in the first place. Instead, queue for retry where we otherwise had done the error completion. Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com> Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
* drbd: base completion and destruction of requests on ref countsLars Ellenberg2012-11-08
| | | | | | | | | | | | | | cherry-picked and adapted from drbd 9 devel branch The logic for when to get or put a reference is in mod_rq_state(). To not get confused in the freeze/thaw respectively resend/restart paths, or when cleaning up requests waiting for P_BARRIER_ACK, this also introduces additional state flags: RQ_COMPLETION_SUSP, and RQ_EXP_BARR_ACK. Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com> Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
* drbd: rename drbd_restart_write to drbd_restart_requestLars Ellenberg2012-11-08
| | | | | | | Meanwhile, this is used to restart failed READ requests as well. Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com> Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
* drbd: fix potential deadlock during "restart" of conflicting writesLars Ellenberg2012-11-08
| | | | | | | | | | | | | | | | | | | | | | w_restart_write(), run from worker context, calls __drbd_make_request() and further drbd_al_begin_io(, delegate=true), which then potentially deadlocks. The previous patch moved a BUG_ON to expose such call paths, which would now be triggered. Also, if we call __drbd_make_request() from resource worker context, like w_restart_write() did, and that should block for whatever reason (!drbd_state_is_stable(), resource suspended, ...), we potentially deadlock the whole resource, as the worker is needed for state changes and other things. Create a dedicated retry workqueue for this instead. Also make sure that inc_ap_bio()/dec_ap_bio() are properly paired, even if do_retry() needs to retry itself, in case __drbd_make_request() returns != 0. Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com> Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
* drbd: Get rid of MR_{READ,WRITE}_SHIFTAndreas Gruenbacher2012-11-08
| | | | | Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com> Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
* drbd: detach from frozen backing devicePhilipp Reisner2012-11-08
| | | | | | | | | | | | | | | | | | | | * drbd-8.3: documentation: Documented detach's --force and disk's --disk-timeout drbd: Implemented the disk-timeout option drbd: Force flag for the detach operation drbd: Allow new IOs while the local disk in in FAILED state drbd: Bitmap IO functions can not return prematurely if the disk breaks drbd: Added a kref to bm_aio_ctx drbd: Hold a reference to ldev while doing meta-data IO drbd: Keep a reference to the bio until the completion handler finished drbd: Implemented wait_until_done_or_disk_failure() drbd: Replaced md_io_mutex by an atomic: md_io_in_use drbd: moved md_io into mdev drbd: Immediately allow completion of IOs, that wait for IO completions on a failed disk drbd: Keep a reference to barrier acked requests Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com> Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
* drbd: Runtime changeable wire protocolPhilipp Reisner2012-11-08
| | | | | | | | | | | The wire protocol is no longer a property that is negotiated between the two peers. It is now expressed with two bits (DP_SEND_WRITE_ACK and DP_SEND_RECEIVE_ACK) in each data packet. Therefore the primary node is free to change the wire protocol at any time without disconnect/reconnect. Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com> Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
* drbd: Introduced a new type union drbd_dev_statePhilipp Reisner2012-11-08
| | | | | Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com> Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
* drbd: Rename various functions from *_oos_* to *_out_of_sync_* for clarityAndreas Gruenbacher2012-11-08
| | | | | Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com> Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
* drbd: Converted the transfer log from mdev to tconnPhilipp Reisner2011-10-14
| | | | | Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com> Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
* drbd: Improve how conflicting writes are handledAndreas Gruenbacher2011-10-14
| | | | | | | | | | | | | | | | | | | The previous algorithm for dealing with overlapping concurrent writes was generating unnecessary warnings for scenarios which could be legitimate, and did not always handle partially overlapping requests correctly. Improve it algorithm as follows: * While local or remote write requests are in progress, conflicting new local write requests will be delayed (commit 82172f7). * When a conflict between a local and remote write request is detected, the node with the discard flag decides how to resolve the conflict: It will ask its peer to discard conflicting requests which are fully contained in the local request and retry requests which overlap only partially. This involves a protocol change. Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com> Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
* drbd: Rename drbd_endio_{pri,sec} -> drbd_{,peer_}request_endioAndreas Gruenbacher2011-10-14
| | | | | Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com> Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
* drbd: Moved the mdev member into drbd_work (from drbd_request and ↵Philipp Reisner2011-09-28
| | | | | | | drbd_peer_request) Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com> Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
* drbd: Allow to wait for the completion of an epoch entry as wellAndreas Gruenbacher2011-09-28
| | | | | Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com> Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
* drbd: struct drbd_request: Introduce a new collision flagAndreas Gruenbacher2011-09-28
| | | | | | | | This flag is set when a processes puts itself to sleep to wait for a conflicting request to complete. Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com> Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
* drbd: Move some functions to where they are usedAndreas Gruenbacher2011-09-28
| | | | | | | | | Move drbd_update_congested() to drbd_main.c, and drbd_req_new() and drbd_req_free() to drbd_req.c: those functions are not used anywhere else. Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com> Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
* drbd: moved req_lock and transfer log from mdev to tconnPhilipp Reisner2011-08-29
| | | | | | | | | | | | | sed -i \ -e 's/mdev->req_lock/mdev->tconn->req_lock/g' \ -e 's/mdev->unused_spare_tle/mdev->tconn->unused_spare_tle/g' \ -e 's/mdev->newest_tle/mdev->tconn->newest_tle/g' \ -e 's/mdev->oldest_tle/mdev->tconn->oldest_tle/g' \ -e 's/mdev->out_of_sequence_requests/mdev->tconn->out_of_sequence_requests/g' \ *.[ch] Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com> Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
* drbd: Inline function overlaps() is now unusedAndreas Gruenbacher2011-08-29
| | | | | Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com> Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
* drbd: Convert all constants in enum drbd_req_event to upper caseAndreas Gruenbacher2011-08-29
| | | | | Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com> Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
* drbd: Remove the unused hash tablesAndreas Gruenbacher2011-08-29
| | | | | Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com> Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
* drbd: Use interval tree for overlapping write request detectionAndreas Gruenbacher2011-08-25
| | | | | Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com> Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
* drbd: Put sector and size in struct drbd_request into struct drbd_intervalAndreas Gruenbacher2011-08-25
| | | | | Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com> Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
* drbd: Request lookup code cleanup (1)Andreas Gruenbacher2011-08-25
| | | | | | | | | Move _ar_id_to_req() to drbd_receiver.c and mark it non-inline. Remove the leading underscores from _ar_id_to_req() and _ack_id_to_req(). Mark ar_hash_slot() inline. Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com> Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
* drbd: fix warningAndrew Morton2011-05-24
| | | | | | | | | | | | | In file included from drivers/block/drbd/drbd_main.c:54: drivers/block/drbd/drbd_int.h:1190: warning: parameter has incomplete type Forward declarations of enums do not work. Fix it unpleasantly by moving the prototype. Cc: Jens Axboe <axboe@kernel.dk> Signed-off-by: Lars Ellenberg <drbd-dev@lists.linbit.com> Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
* drbd: Fix spellingBart Van Assche2011-05-24
| | | | | | | | Found these with the help of ispell -l. Signed-off-by: Bart Van Assche <bvanassche@acm.org> Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com> Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com>
* drbd: Implemented real timeout checking for request processing timePhilipp Reisner2011-03-10
| | | | | Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com> Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
* drbd: Ensure that an epoch contains only requests of one kindPhilipp Reisner2011-03-10
| | | | | | | | | The assert in drbd_req.c:755 forces us to have only requests of one kind in an epoch. The two kinds we distinguish here are: local-only or mirrored. Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com> Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
* drbd: Begin to account BIO processing time before inc_ap_bio()Philipp Reisner2011-03-10
| | | | | | | Since inc_ap_bio() might sleep already Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com> Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
* drbd: New packet for Ahead/Behind mode: P_OUT_OF_SYNCPhilipp Reisner2011-03-10
| | | | | Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com> Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
* drbd: Track the numbers of sectors in flightPhilipp Reisner2011-03-10
| | | | | Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com> Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
* drbd: fix for spin_lock_irqsave in endio callbackLars Ellenberg2010-11-27
| | | | | | | | | | | | | | | | | In commit 9b7f76dc37919ea36caa9680a3f765e5b19b25fb, Author: Lars Ellenberg <lars.ellenberg@linbit.com> Date: Wed Aug 11 23:40:24 2010 +0200 drbd: new configuration parameter c-min-rate a bad chunk slipped through, which is now reverted as well, restoring the correct irqsave for the endio callback. This patch also add comments at both req_mod() and in the endio callback so it should not happen again. Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com> Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
* drbd: Disable activity log updates when the whole device is out of syncPhilipp Reisner2010-10-14
| | | | | | | | | | | | | | | | | | | | | When the complete device is marked as out of sync, we can disable updates of the on disk AL. Currently AL updates are only disabled if one uses the "invalidate-remote" command on an unconnected, primary device, or when at attach time all bits in the bitmap are set. As of now, AL updated do not get disabled when a all bits becomes set due to application writes to an unconnected DRBD device. While this is a missing feature, it is not considered important, and might get added later. BTW, after initializing a "one legged" DRBD device drbdadm create-md resX drbdadm -- --force primary resX AL updates also get disabled, until the first connect. Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com> Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
* drbd: Finished the "on-no-data-accessible suspend-io;" functionalityPhilipp Reisner2010-10-14
| | | | | | | | | When no data is accessible (no connection to the peer, nor a local disk) allow the user to select to freeze all IO operations instead of getting IO errors. Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com> Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
* drbd: factored drbd_req_make_private_bio() out of drbd_req_new()Philipp Reisner2010-10-14
| | | | | | | Preparing tl_thaw_dio() Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com> Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
* drbd: factored tl_restart() out of tl_clear().Philipp Reisner2010-10-14
| | | | | | | | If IO was frozen for a temporal network outage, resend the content of the transfer-log into the newly established connection. Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com> Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
generated by cgit v1.2.1 (git 2.18.0) at 2024-10-30 20:33:02 +0000