linux/drivers/block/drbd, branch v3.19

Merge branch 'for-3.19/drivers' of git://git.kernel.dk/linux-block

2014-12-13T22:22:26Z

Pull block layer driver updates from Jens Axboe: - NVMe updates: - The blk-mq conversion from Matias (and others) - A stack of NVMe bug fixes from the nvme tree, mostly from Keith. - Various bug fixes from me, fixing issues in both the blk-mq conversion and generic bugs. - Abort and CPU online fix from Sam. - Hot add/remove fix from Indraneel. - A couple of drbd fixes from the drbd team (Andreas, Lars, Philipp) - With the generic IO stat accounting from 3.19/core, converting md, bcache, and rsxx to use those. From Gu Zheng. - Boundary check for queue/irq mode for null_blk from Matias. Fixes cases where invalid values could be given, causing the device to hang. - The xen blkfront pull request, with two bug fixes from Vitaly. * 'for-3.19/drivers' of git://git.kernel.dk/linux-block: (56 commits) NVMe: fix race condition in nvme_submit_sync_cmd() NVMe: fix retry/error logic in nvme_queue_rq() NVMe: Fix FS mount issue (hot-remove followed by hot-add) NVMe: fix error return checking from blk_mq_alloc_request() NVMe: fix freeing of wrong request in abort path xen/blkfront: remove redundant flush_op xen/blkfront: improve protection against issuing unsupported REQ_FUA NVMe: Fix command setup on IO retry null_blk: boundary check queue_mode and irqmode block/rsxx: use generic io stats accounting functions to simplify io stat accounting md: use generic io stats accounting functions to simplify io stat accounting drbd: use generic io stats accounting functions to simplify io stat accounting md/bcache: use generic io stats accounting functions to simplify io stat accounting NVMe: Update module version major number NVMe: fail pci initialization if the device doesn't have any BARs NVMe: add ->exit_hctx() hook NVMe: make setup work for devices that don't do INTx NVMe: enable IO stats by default NVMe: nvme_submit_async_admin_req() must use atomic rq allocation NVMe: replace blk_put_request() with blk_mq_free_request() ...

drbd: use generic io stats accounting functions to simplify io stat accounting

2014-11-24T15:05:14Z

Use generic io stats accounting help functions (generic_{start,end}_io_acct) to simplify io stat accounting. Signed-off-by: Gu Zheng Signed-off-by: Jens Axboe

kill f_dentry uses

2014-11-19T18:01:25Z

Signed-off-by: Al Viro

drbd: Remove an useless copy of kernel_setsockopt()

2014-11-10T16:27:43Z

Old backward-compat cruft Signed-off-by: Philipp Reisner Signed-off-by: Lars Ellenberg Signed-off-by: Jens Axboe

drbd: Fix state change in case of connection timeout

2014-11-10T16:27:41Z

A connection timeout affects all volumes of a resource! Under the following conditions: A resource with multiple volumes AND ko-count >=1 AND a write request triggers the timeout (ko-count * timeout) DRBD's internal state gets confused. That in turn may lead to very miss leading follow up failures. E.g. "BUG: scheduling while atomic" CC: stable@kernel.org # v3.17 Signed-off-by: Philipp Reisner Signed-off-by: Lars Ellenberg Signed-off-by: Jens Axboe

drbd: merge_bvec_fn: properly remap bvm->bi_bdev

2014-11-10T16:27:39Z

This was not noticed for many years. Affects operation if md raid is used a backing device for DRBD. CC: stable@kernel.org # v3.2+ Signed-off-by: Philipp Reisner Signed-off-by: Lars Ellenberg Signed-off-by: Jens Axboe

drbd: fix resync throttling initialization

2014-11-10T16:27:37Z

If for some reason DRBD resync was the only activity on a backend device, drbd_rs_c_min_rate_throttle() would mistakenly decide that it is still initialization time, and keep throttling the resync. This patch explicitly initializes ->rs_last_events to the current backend event counters, and drops the rs_last_events == 0 from the throttle condition. Reported-by: Mikhail Sugakov Signed-off-by: Philipp Reisner Signed-off-by: Lars Ellenberg Signed-off-by: Jens Axboe

drbd: fix race between role change and handshake

2014-11-10T16:27:35Z

Symptoms: If DRBD was "cleanly shut down" (all in sync, both Secondary before disconnect, identical data generation uuids), and then one side was promoted *during* the next connection handshake, the role change could confuse the handshake. The Primary would get stuck in WFBitmapS, the Secondary would log unexpected cstate (Connected) in receive_bitmap and get stuck in WFBitmapT. Fix: The test in is_valid_soft_transition wrong. It works because the not allowed actions (promote/attach) do not touch the cstate. The previous condition failed to demand a cstate change in one clause. In order to avoid deadlocks give up the state_mutex while waiting for the transient state to go away. Conflicts: drbd/drbd_state.c drbd/drbd_state.h drbd/drbd_wrappers.h Signed-off-by: Philipp Reisner Signed-off-by: Lars Ellenberg Signed-off-by: Jens Axboe

drbd: Only use drbd_msg_put_info() in drbd_nl.c

2014-11-10T16:27:33Z

Avoid generic netlink calls in other parts of the code base. Signed-off-by: Philipp Reisner Signed-off-by: Lars Ellenberg Signed-off-by: Jens Axboe

drbd: Minor cleanups

2014-11-10T16:27:30Z

. Update comments . drbd_set_{in,out_of}_sync(): Remove unused parameters . Move common code into adm_del_resource() . Redefine ERR_MINOR_EXISTS -> ERR_MINOR_OR_VOLUME_EXISTS Signed-off-by: Philipp Reisner Signed-off-by: Lars Ellenberg Signed-off-by: Jens Axboe