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| * drbd: Allow online change of replication protocol only with agreed_pv >= 100Philipp Reisner2012-11-08
| | | | | | | | | | Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com> Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
| * drbd: Check consistency of net options when the get changed onlinePhilipp Reisner2012-11-08
| | | | | | | | | | 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: protect all idr accesses that might sleep with drbd_cfg_rwsemPhilipp Reisner2012-11-08
| | | | | | | | | | | | | | | | | | | | | | | | | | | | With this commit the locking for all accesses to IDRs is complete: * Non sleeping read accesses are protected by RCU * sleeping read accesses are protocted by a read lock on drbd_cfg_rwsem * accesses that add anything are protected by a write lock * accesses that remove an object are protoected by a write lock and a call to synchronize_rcu() after it is removed from the IDR and before the object is actually free()ed. Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com> Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
| * drbd: Converted drbd_cfg_mutex into drbd_cfg_rwsemPhilipp Reisner2012-11-08
| | | | | | | | | | Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com> Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
| * drbd: rcu_read_[un]lock() for all idr accesses that do not sleepPhilipp Reisner2012-11-08
| | | | | | | | | | Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com> Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
| * drbd: Inlined drbd_free_mdev(); it got called only from one placePhilipp Reisner2012-11-08
| | | | | | | | | | Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com> Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
| * drbd: drbd_delete_device() takes a struct drbd_conf * nowPhilipp Reisner2012-11-08
| | | | | | | | | | Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com> Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
| * drbd: Rename drbd_pp_free() to drbd_free_pages()Andreas Gruenbacher2012-11-08
| | | | | | | | | | Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com> Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
| * drbd: Rename drbd_pp_alloc() to drbd_alloc_pages() and make it non-staticAndreas Gruenbacher2012-11-08
| | | | | | | | | | Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com> Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
| * drbd: Rename drbd_pp_first_pages_or_try_alloc() to __drbd_alloc_pages()Andreas Gruenbacher2012-11-08
| | | | | | | | | | Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com> Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
| * drbd: Make drbd_wait_ee_list_empty() and _drbd_wait_ee_list_empty() staticAndreas Gruenbacher2012-11-08
| | | | | | | | | | Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com> Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
| * drbd: Rename drbd_{ ee -> peer_req }_has_active_pageAndreas Gruenbacher2012-11-08
| | | | | | | | | | Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com> Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
| * drbd: Rename reclaim_net_ee(), drbd_process_done_ee(), ↵Andreas Gruenbacher2012-11-08
| | | | | | | | | | | | | | drbd_process_done_ee(), tconn_process_done_ee() to *_peer_reqs Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com> Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
| * drbd: Rename drbd_release_ee() to drbd_free_peer_reqs()Andreas Gruenbacher2012-11-08
| | | | | | | | | | Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com> Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
| * drbd: Rename drbd_free_ee() and variants to *_peer_req()Andreas Gruenbacher2012-11-08
| | | | | | | | | | Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com> Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
| * drbd: Rename drbd_alloc_ee() to drbd_alloc_peer_req()Andreas Gruenbacher2012-11-08
| | | | | | | | | | Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com> Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
| * drbd: drbd_init_ee() no longer existsAndreas Gruenbacher2012-11-08
| | | | | | | | | | Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com> Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
| * drbd: Make all asynchronous command handlers return 0 upon success and an ↵Andreas Gruenbacher2012-11-08
| | | | | | | | | | | | | | error code otherwise Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com> Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
| * drbd: validate_req_change_req_state(): Return 0 upon success and an error ↵Andreas Gruenbacher2012-11-08
| | | | | | | | | | | | | | code otherwise Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com> Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
| * drbd: Removed outdated comments and code that envisioned VNRs in header 95Andreas Gruenbacher2012-11-08
| | | | | | | | | | | | | | | | | | Since have now header 100, that has space for 16 bit volume numbers, the high byte of the length in header 95 is no longer reserved for 8 bit volume numbers. Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com> Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
| * drbd: Introduce protocol version 100 headersAndreas Gruenbacher2012-11-08
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The 8 byte header finally becomes too small. With the protocol 100 header we have 16 bit for the volume number, proper 32 bit for the data length, and 32 bit for further extensions in the future. Previous versions of drbd are using version 80 headers for all packets short enough for protocol 80. They support both header versions in worker context, but only version 80 headers in asynchronous context. For backwards compatibility, continue to use version 80 headers for short packets before protocol version 100. From protocol version 100 on, use the same header version for all packets. Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com> Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
| * drbd: Remove headers from on-the-wire data structures (struct p_*)Andreas Gruenbacher2012-11-08
| | | | | | | | | | | | | | | | | | Prepare the introduction of the protocol 100 headers. The actual protocol header is removed for the packet declarations. I.e. allow us to use the packets with different headers. Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com> Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
| * drbd: Remove some fixed header size assumptionsAndreas Gruenbacher2012-11-08
| | | | | | | | | | Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com> Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
| * drbd: Remove now-unused int_dig_out bufferAndreas Gruenbacher2012-11-08
| | | | | | | | | | Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com> Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
| * drbd: Replace and remove old primitivesAndreas Gruenbacher2012-11-08
| | | | | | | | | | | | | | | | | | | | | | | | | | Centralize sock->mutex locking and unlocking in [drbd|conn]_prepare_command() and [drbd|conn]_send_comman(). Therefore all *_send_* functions are touched to use these primitives instead of drbd_get_data_sock()/drbd_put_data_sock() and former helper functions. That change makes the *_send_* functions more standardized. Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com> Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
| * drbd: Introduce drbd_header_size()Andreas Gruenbacher2012-11-08
| | | | | | | | | | Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com> Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
| * drbd: Introduce new primitives for sending commandsAndreas Gruenbacher2012-11-08
| | | | | | | | | | Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com> Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
| * drbd: drbd_send_ping(), drbd_send_ping(): Return 0 upon success and an error ↵Andreas Gruenbacher2012-11-08
| | | | | | | | | | | | | | code otherwise Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com> Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
| * drbd: Use tconn in request_timer_fn()Philipp Reisner2012-11-08
| | | | | | | | | | Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com> Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
| * drbd: Improved logging of state changesPhilipp Reisner2012-11-08
| | | | | | | | | | Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com> Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
| * drbd: Implemented IO thawing for multiple volumesPhilipp Reisner2012-11-08
| | | | | | | | | | Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com> Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
| * drbd: Implemented conn_lowest_disk()Philipp Reisner2012-11-08
| | | | | | | | | | Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com> Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
| * drbd: Implemented conn_lowest_conn()Philipp Reisner2012-11-08
| | | | | | | | | | Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com> Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
| * drbd: Calculate and provide ns_min to the w_after_conn_state_ch() workPhilipp Reisner2012-11-08
| | | | | | | | | | Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com> Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
| * drbd: Renamed nms to ns_maxPhilipp Reisner2012-11-08
| | | | | | | | | | 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: Moved susp, susp_nod and susp_fen to the connection objectPhilipp Reisner2012-11-08
| | | | | | | | | | Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com> Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
| * drbd: Renamed id_susp(union drbd_state s) to drbd_suspended(struct drbd_conf *)Philipp Reisner2012-11-08
| | | | | | | | | | Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com> Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
| * drbd: Introduced drbd_read_state()Philipp Reisner2012-11-08
| | | | | | | | | | Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com> Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
| * drbd: improvements to activate/deactivate multiple activity log extentsLars Ellenberg2012-11-08
| | | | | | | | | | | | | | | | | | | | | | | | | | Recent commit drbd: get rid of bio_split, allow bios of "arbitrary" size had a reference count leak: it only deactivated the first of several activity log extents for intervals crossing extent boundaries. This commit generalizes on bios spanning multiple activity log extents in drbd_al_begin_io, and adds the necessary loop around lc_put in drbd_al_complete_io as well. Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com> Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
| * drbd: get rid of bio_split, allow bios of "arbitrary" sizeLars Ellenberg2012-11-08
| | | | | | | | | | | | | | | | Where "arbitrary" size is currently 1 MiB, which is the BIO_MAX_SIZE for architectures with 4k PAGE_CACHE_SIZE (most). Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com> Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
| * drbd: prepare to activate two activity log extents at onceLars Ellenberg2012-11-08
| | | | | | | | | | Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com> Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
| * drbd: preparation commit, pass drbd_interval to drbd_al_begin/complete_ioLars Ellenberg2012-11-08
| | | | | | | | | | | | | | | | | | We want to avoid bio_split for bios crossing activity log boundaries. So we may need to activate two activity log extents "atomically". drbd_al_begin_io() needs to know more than just the start sector. Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com> Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
| * drbd: introduce the "initialized" activity log transaction typeLars Ellenberg2012-11-08
| | | | | | | | | | | | | | | | | | So we can initialize a clean on disk activity log area, without the module complaining with loud assert messages because of checksum or magic value mismatches. Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com> Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
| * drbd: Change how the "handshake" packets are calledAndreas Gruenbacher2012-11-08
| | | | | | | | | | | | | | | | | | | | | | | | Packets of type P_HAND_SHAKE define which protocol versions and features a node supports. For clarity, call those packets P_CONNECTION_FEATURES instead. (This does not determine the features that a specific drbd device supports, such as drbd protocol A, B, C.) Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com> Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
| * drbd: Change how the initial packets are calledAndreas Gruenbacher2012-11-08
| | | | | | | | | | | | | | | | | | | | The first packets exchanged when a connection is established are referred to as P_HAND_SHAKE_S and P_HAND_SHAKE_M in the code, followed by P_HAND_SHAKE packets. To avoid confusion between these two unrelated things, call the initial packets P_INITIAL_DATA and P_INITIAL_META. Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com> Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
| * drbd: _conn_send_cmd(), _drbd_send_cmd(): Pass a struct drbd_socket instead ↵Andreas Gruenbacher2012-11-08
| | | | | | | | | | | | | | of a plain socket Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com> Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
| * drbd: drbd_connect(): Initialize struct drbd_socket before sending anythingAndreas Gruenbacher2012-11-08
| | | | | | | | | | Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com> Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
| * drbd: Map from (connection, volume number) to device in the asender handlersAndreas Gruenbacher2012-11-08
| | | | | | | | | | Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com> Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
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