- 03 Nov, 2012 8 commits
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Lars Ellenberg authored
We have resources resp. connections, volumes, and minor numbers. A config request may specifies all three of them. If it turns out that the minor belongs to a different connection, or a different volume number in the same connection, that configuration request is invalid. Signed-off-by:
Philipp Reisner <philipp.reisner@linbit.com> Signed-off-by:
Lars Ellenberg <lars.ellenberg@linbit.com>
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Lars Ellenberg authored
Follow O_CREAT semantics when creating connection or minor device/volume objects. If we need O_CREAT|O_EXCL semantics some time down the road, we can add NLM_F_EXCL to the netlink message flags. Signed-off-by:
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Lars Ellenberg authored
Even if the connection is still established. We should be able to reduce a volume from a replication group, without taking the whole group offline. Signed-off-by:
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Lars Ellenberg authored
Get rid of a temporary variable and, funny bitand assignment. Just short circuit, returning false, once we encounter the first still configured volume. FIXME verify call sites for need of rcu_read_lock or stronger. Signed-off-by:
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Lars Ellenberg authored
We want to see existing connection objects, even if they do not currently have volumes attached. Change the .dumpit variant of drbd_adm_get_status to iterate not over minor devices, but over connections + volumes. Signed-off-by:
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Lars Ellenberg authored
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Lars Ellenberg authored
s/idr_get_new/idr_get_new_above/ Signed-off-by:
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Lars Ellenberg authored
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- 14 Oct, 2011 32 commits
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Lars Ellenberg authored
This adds the new API header and helper files. Signed-off-by:
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Lars Ellenberg authored
This function was used to broadcast the (leading part of the) bio payload in case we see a data integrity error. It could be received from userland with the drbdsetup events subcommand, to have a peek into the payload that caused the checksum mismatch, and guess from there what may have caused the mismatch, mainly to guess wether it was modification of in-flight data, or data corruption by broken hardware or software bugs. Meanwhile we support bios that are larger than the maximum payload a netlink datagram can carry. And we have means to reliably detect modification of in-flight data by calculating, and comparing, the checksum before and after sendmsg. There is no need to carry this around anymore. Signed-off-by:
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Lars Ellenberg authored
drbd: fix drbd_delete_device: remove vnr from volumes; idr_remove(); synchronize_rcu(); before cleanup Still missing: rcu_readlock() on the various call sites that access/iterate over those idrs. We don't need a specific write lock, as we only modify from configuration context, which is already strictly serialized. Signed-off-by:
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Lars Ellenberg authored
Don't rely on availability of bios from the global fs_bio_set, we should use our own bio_set for meta data IO. Signed-off-by:
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Lars Ellenberg authored
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Lars Ellenberg authored
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Lars Ellenberg authored
This commit got it wrong: drbd: Make the peer_seq updating code more obvious Make it more clear that update_peer_seq() is supposed to wake up the seq_wait queue whenever the sequence number changes. We don't need to wake up everytime we receive a sequence number that is _different_ from our currently stored "newest" sequence number, but only if we receive a sequence number _newer_ than what we already have, when we actually change mdev->peer_seq. Signed-off-by: -
Lars Ellenberg authored
Old default behaviour was "pass-on", which is not useful in production at all. Signed-off-by:
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Lars Ellenberg authored
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Philipp Reisner authored
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Philipp Reisner authored
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Philipp Reisner authored
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Philipp Reisner authored
Up to now it only operated on minor numbers. Now it can work also on named connections. Signed-off-by:
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Philipp Reisner authored
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Philipp Reisner authored
Now those can be used with a struct drbd_conf * that has an other name than 'mdev'. Signed-off-by:
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Philipp Reisner authored
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Philipp Reisner authored
* Moved CONFIG_PENDING and DEVICE_DYING from mdev to tconn. * Renamed drbd_reconfig_start() and drbd_reconfig_done() to conn_reconfig_start() and conn_reconfig_done(). Signed-off-by:
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Andreas Gruenbacher authored
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Andreas Gruenbacher authored
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Andreas Gruenbacher authored
Instead of artificially enlarging the command decoding arrays to P_MAX_CMD entries, check if an index is within the valid range using the ARRAY_SIZE() macro. Signed-off-by:
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Andreas Gruenbacher authored
Opening a device only succeeds on a primary node, or when explicitly setting the allow_oos module parameter to allow opening the device read-only on a secondary node. There is no other way that a request can get into drbd_make_request(), so this code cannot trigger. Signed-off-by:
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Andreas Gruenbacher authored
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:
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Andreas Gruenbacher authored
When the node with the discard flag resolves write conflicts in dual-primary mode, it may determine that its peer has sent ack packets on the metadata socket which did not arrive, yet. Wait for the next ack with ping-timeout instead of a hard-coded 30 seconds. Signed-off-by:
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Andreas Gruenbacher authored
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Andreas Gruenbacher authored
Commit 9b1e63e changed the concurrent write detection algorithm to only insert peer requests into write_requests tree after determining that there is no conflict. With this change, new conflicting local requests could be added while the algorithm runs, but this case was not handled correctly. Instead of making the algorithm deal with this case, switch back to adding peer requests to the write_requests tree immediately: this improves fairness. When a peer request is discarded, remove that request from the write_requests Signed-off-by:
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Andreas Gruenbacher authored
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Lars Ellenberg authored
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Lars Ellenberg authored
Summary log messages meant for global bitmap IO should not be printed for bitmap IO caused by activity log transactions. Signed-off-by:
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Lars Ellenberg authored
Use a new on-disk transaction format for the activity log, which allows for multiple changes to the active set per transaction. Using 4k transaction blocks, we can now get rid of the work-around code to deal with devices not supporting 512 byte logical block size. Signed-off-by:
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Lars Ellenberg authored
Allow multiple changes to the active set of elements in lru_cache. The only current user of lru_cache, drbd, is driving this generalisation. Signed-off-by:
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Lars Ellenberg authored
We are about to allow several changes to the active set in one activity log transaction. We have to write out the corresponding bitmap pages as well, if changed. Introduce drbd_bm_mark_for_writeout(), then re-use the existing bitmap writeout path to submit all marked pages in one go. Signed-off-by:
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Lars Ellenberg authored
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