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2018-06-01lightnvm: pass flag on graceful teardown to targetsJavier González5-17/+34
If the namespace is unregistered before the LightNVM target is removed (e.g., on hot unplug) it is too late for the target to store any metadata on the device - any attempt to write to the device will fail. In this case, pass on a "gracefull teardown" flag to the target to let it know when this happens. In the case of pblk, we pad the open line (close all open chunks) to improve data retention. In the event of an ungraceful shutdown, avoid this part and just clean up. Signed-off-by: Javier González <javier@cnexlabs.com> Signed-off-by: Matias Bjørling <mb@lightnvm.io> Signed-off-by: Jens Axboe <axboe@kernel.dk>
2018-06-01lightnvm: pblk: check for chunk size before allocating itJavier González1-3/+3
Do the check for the chunk state after making sure that the chunk type is supported. Fixes: 32ef9412c114 ("lightnvm: pblk: implement get log report chunk") Signed-off-by: Javier González <javier@cnexlabs.com> Signed-off-by: Matias Bjørling <mb@lightnvm.io> Signed-off-by: Jens Axboe <axboe@kernel.dk>
2018-06-01lightnvm: pblk: remove unnecessary argumentJavier González3-5/+5
Remove unnecessary argument on pblk_line_free() Signed-off-by: Javier González <javier@cnexlabs.com> Signed-off-by: Matias Bjørling <mb@lightnvm.io> Signed-off-by: Jens Axboe <axboe@kernel.dk>
2018-06-01lightnvm: pblk: remove unnecessary indirectionJavier González1-12/+2
Call nvm_submit_io directly and remove an unnecessary indirection on the read path. Signed-off-by: Javier González <javier@cnexlabs.com> Signed-off-by: Matias Bjørling <mb@lightnvm.io> Signed-off-by: Jens Axboe <axboe@kernel.dk>
2018-06-01lightnvm: pblk: return NVM_ error on failed submissionJavier González1-14/+8
Return a meaningful error when the sanity vector I/O check fails. Signed-off-by: Javier González <javier@cnexlabs.com> Signed-off-by: Matias Bjørling <mb@lightnvm.io> Signed-off-by: Jens Axboe <axboe@kernel.dk>
2018-06-01lightnvm: pblk: warn in case of corrupted write bufferJavier González1-3/+2
When cleaning up buffer entries as we wrap up, their state should be "completed". If any of the entries is in "submitted" state, it means that something bad has happened. Trigger a warning immediately instead of waiting for the state flag to eventually be updated, thus hiding the issue. Signed-off-by: Javier González <javier@cnexlabs.com> Signed-off-by: Matias Bjørling <mb@lightnvm.io> Signed-off-by: Jens Axboe <axboe@kernel.dk>
2018-06-01lightnvm: pblk: improve error msg on corrupted LBAsJavier González1-10/+32
In the event of a mismatch between the read LBA and the metadata pointer reported by the device, improve the error message to be able to detect the offending physical address (PPA) mapped to the corrupted LBA. Signed-off-by: Javier González <javier@cnexlabs.com> Signed-off-by: Matias Bjørling <mb@lightnvm.io> Signed-off-by: Jens Axboe <axboe@kernel.dk>
2018-06-01lightnvm: pblk: check read lba on gc pathJavier González1-6/+33
Check that the lba stored in the LBA metadata is correct in the GC path too. This requires a new helper function to check random reads in the vector read. Signed-off-by: Javier González <javier@cnexlabs.com> Signed-off-by: Matias Bjørling <mb@lightnvm.io> Signed-off-by: Jens Axboe <axboe@kernel.dk>
2018-06-01lightnvm: pblk: recheck for bad lines at runtimeJavier González2-14/+35
Bad blocks can grow at runtime. Check that the number of valid blocks in a line are within the sanity threshold before allocating the line for new writes. Signed-off-by: Javier González <javier@cnexlabs.com> Signed-off-by: Matias Bjørling <mb@lightnvm.io> Signed-off-by: Jens Axboe <axboe@kernel.dk>
2018-06-01lightnvm: pblk: fail gracefully on line alloc. failureJavier González2-9/+29
In the event of a line failing to allocate, fail gracefully and stop the pipeline to avoid more write failing in the same place. Signed-off-by: Javier González <javier@cnexlabs.com> Signed-off-by: Matias Bjørling <mb@lightnvm.io> Signed-off-by: Jens Axboe <axboe@kernel.dk>
2018-06-01Merge branch 'nvme-4.18' of git://git.infradead.org/nvme into for-4.18/blockJens Axboe10-191/+337
Pull NVMe changes from Christoph: "Below is another set of NVMe updates for 4.18. Besides the usual bug fixes this includes more feature completness in terms of AEN and log page handling on the target." * 'nvme-4.18' of git://git.infradead.org/nvme: nvme: use the changed namespaces list log to clear ns data changed AENs nvme: mark nvme_queue_scan static nvme: submit AEN event configuration on startup nvmet: mask pending AENs nvmet: add AEN configuration support nvmet: implement the changed namespaces log nvmet: split log page implementation nvmet: add a new nvmet_zero_sgl helper nvme.h: add AEN configuration symbols nvme.h: add the changed namespace list log nvme.h: untangle AEN notice definitions nvmet: fix error return code in nvmet_file_ns_enable() nvmet: fix a typo in nvmet_file_ns_enable() nvme-fabrics: allow internal passthrough command on deleting controllers nvme-loop: add support for multiple ports nvme-pci: simplify __nvme_submit_cmd nvme-pci: Rate limit the nvme timeout warnings nvme: allow duplicate controller if prior controller being deleted
2018-06-01nvme: use the changed namespaces list log to clear ns data changed AENsChristoph Hellwig2-4/+49
Per section 5.2 we need to issue the corresponding log page to clear an AEN, so for a namespace data changed AEN we need to read the changed namespace list log. And once we read that log anyway we might as well use it to optimize the rescan. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
2018-06-01nvme: mark nvme_queue_scan staticChristoph Hellwig2-11/+9
And move it toward the top of the file to avoid a forward declaration. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Sagi Grimberg <sagi@grimberg.me> Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de>
2018-06-01nvme: submit AEN event configuration on startupHannes Reinecke2-0/+18
We should register for AEN events; some law-abiding targets might not be sending us AENs otherwise. Signed-off-by: Hannes Reinecke <hare@suse.com> [hch: slight cleanups] Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de> Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
2018-06-01nvmet: mask pending AENsChristoph Hellwig3-1/+10
Per section 5.2 of the NVMe 1.3 spec: "When the controller posts a completion queue entry for an outstanding Asynchronous Event Request command and thus reports an asynchronous event, subsequent events of that event type are automatically masked by the controller until the host clears that event. An event is cleared by reading the log page associated with that event using the Get Log Page command (see section 5.14)." Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
2018-06-01nvmet: add AEN configuration supportChristoph Hellwig3-2/+32
AEN configuration via the 'Get Features' and 'Set Features' admin command is mandatory, so we should be implemeting handling for it. Signed-off-by: Hannes Reinecke <hare@suse.com> [hch: use WRITE_ONCE, check for invalid values] Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Sagi Grimberg <sagi@grimberg.me> Reviewed-by: Daniel Verkamp <daniel.verkamp@intel.com>
2018-06-01nvmet: implement the changed namespaces logChristoph Hellwig3-9/+76
Just keep a per-controller buffer of changed namespaces and copy it out in the get log page implementation. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Sagi Grimberg <sagi@grimberg.me> Reviewed-by: Daniel Verkamp <daniel.verkamp@intel.com>
2018-06-01nvmet: split log page implementationChristoph Hellwig1-63/+36
Remove the common code to allocate a buffer and copy it into the SGL. Instead the two no-op implementations just zero the SGL directly, and the smart log allocates a buffer on its own. This prepares for the more elaborate ANA log page. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Sagi Grimberg <sagi@grimberg.me> Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de>
2018-06-01nvmet: add a new nvmet_zero_sgl helperChristoph Hellwig2-0/+8
Zeroes the SGL in the payload. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Sagi Grimberg <sagi@grimberg.me> Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de>
2018-05-31nvme.h: untangle AEN notice definitionsChristoph Hellwig1-12/+18
Stop including the event type in the definitions for the notice type. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Sagi Grimberg <sagi@grimberg.me> Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de>
2018-05-31nvmet: fix error return code in nvmet_file_ns_enable()Wei Yongjun1-2/+6
Fix to return error code -ENOMEM from the memory alloc fail error handling case instead of 0, as done elsewhere in this function. Fixes: d5eff33ee6f8 ("nvmet: add simple file backed ns support") Signed-off-by: Wei Yongjun <weiyongjun1@huawei.com> Reviewed-by: Sagi Grimberg <sagi@grimberg.e> Signed-off-by: Christoph Hellwig <hch@lst.de>
2018-05-31nvmet: fix a typo in nvmet_file_ns_enable()Wei Yongjun1-1/+1
Fix a typo in nvmet_file_ns_enable(). Fixes: d5eff33ee6f8 ("nvmet: add simple file backed ns support") Signed-off-by: Wei Yongjun <weiyongjun1@huawei.com> Reviewed-by: Sagi Grimberg <sagi@grimberg.e> Signed-off-by: Christoph Hellwig <hch@lst.de>
2018-05-31nvme-fabrics: allow internal passthrough command on deleting controllersChristoph Hellwig1-48/+31
Without this we can't cleanly shut down. Based on analysis an an earlier patch from Hannes Reinecke. Fixes: bb06ec31452f ("nvme: expand nvmf_check_if_ready checks") Reported-by: Hannes Reinecke <hare@suse.de> Tested-by: Hannes Reinecke <hare@suse.com> Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Sagi Grimberg <sagi@grimberg.me> Reviewed-by: James Smart <james.smart@broadcom.com>
2018-05-31target: convert to bioset_init()/mempool_init()Kent Overstreet2-9/+7
Convert the target code to embedded bio sets. Reviewed-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Kent Overstreet <kent.overstreet@gmail.com> Signed-off-by: Jens Axboe <axboe@kernel.dk>
2018-05-31dm: convert to bioset_init()/mempool_init()Kent Overstreet17-206/+197
Convert dm to embedded bio sets. Acked-by: Mike Snitzer <snitzer@redhat.com> Signed-off-by: Kent Overstreet <kent.overstreet@gmail.com> Signed-off-by: Jens Axboe <axboe@kernel.dk>
2018-05-31md: convert to bioset_init()/mempool_init()Kent Overstreet15-181/+159
Convert md to embedded bio sets. Signed-off-by: Kent Overstreet <kent.overstreet@gmail.com> Signed-off-by: Jens Axboe <axboe@kernel.dk>
2018-05-31bcache: convert to bioset_init()/mempool_init()Kent Overstreet7-52/+37
Convert bcache to embedded bio sets. Reviewed-by: Coly Li <colyli@suse.de> Signed-off-by: Kent Overstreet <kent.overstreet@gmail.com> Signed-off-by: Jens Axboe <axboe@kernel.dk>
2018-05-31lightnvm: convert to bioset_init()/mempool_init()Kent Overstreet6-65/+65
Convert lightnvm to embedded bio sets. Reviewed-by: Javier González <javier@cnexlabs.com> Signed-off-by: Kent Overstreet <kent.overstreet@gmail.com> Signed-off-by: Jens Axboe <axboe@kernel.dk>
2018-05-31pktcdvd: convert to bioset_init()/mempool_init()Kent Overstreet1-25/+25
Convert pktcdvd to embedded bio sets. Signed-off-by: Kent Overstreet <kent.overstreet@gmail.com> Signed-off-by: Jens Axboe <axboe@kernel.dk>
2018-05-31drbd: convert to bioset_init()/mempool_init()Kent Overstreet6-59/+38
Convert drbd to embedded bio sets and mempools. Signed-off-by: Kent Overstreet <kent.overstreet@gmail.com> Signed-off-by: Jens Axboe <axboe@kernel.dk>
2018-05-31block: convert bounce, q->bio_split to bioset_init()/mempool_init()Kent Overstreet1-1/+1
Convert the core block functionality to embedded bio sets. Reviewed-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Kent Overstreet <kent.overstreet@gmail.com> Signed-off-by: Jens Axboe <axboe@kernel.dk>
2018-05-30blk-mq: only iterate over inflight requests in blk_mq_tagset_busy_iterChristoph Hellwig4-20/+3
We already check for started commands in all callbacks, but we should also protect against already completed commands. Do this by taking the checks to common code. Acked-by: Josef Bacik <josef@toxicpanda.com> Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Jens Axboe <axboe@kernel.dk>
2018-05-30nbd: clear DISCONNECT_REQUESTED flag once disconnection occurs.Kevin Vigor1-6/+15
When a userspace client requests a NBD device be disconnected, the DISCONNECT_REQUESTED flag is set. While this flag is set, the driver will not inform userspace when a connection is closed. Unfortunately the flag was never cleared, so once a disconnect was requested the driver would thereafter never tell userspace about a closed connection. Thus when connections failed due to timeout, no attempt to reconnect was made and eventually the device would fail. Fix by clearing the DISCONNECT_REQUESTED flag (and setting the DISCONNECTED flag) once all connections are closed. Reviewed-by: Josef Bacik <josef@toxicpanda.com> Signed-off-by: Kevin Vigor <kvigor@fb.com> Signed-off-by: Jens Axboe <axboe@kernel.dk>
2018-05-30nvme-loop: add support for multiple portsChristoph Hellwig2-19/+31
This is useful at least for multipath testing. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de>
2018-05-30nvme-pci: simplify __nvme_submit_cmdChristoph Hellwig1-23/+14
With recent CQ handling improvements we can now move the locking into __nvme_submit_cmd. Also remove the local tail variable to make the code more obvious, remove the __ prefix in the name, and fix the comments describing the function. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Jens Axboe <axboe@kernel.dk> Reviewed-by: Max Gurtovoy <maxg@mellanox.com>
2018-05-30nvme-pci: Rate limit the nvme timeout warningsKeith Busch1-1/+1
The block layer's timeout handling currently prevents drivers from completing commands outside the timeout callback once blk-mq decides they've expired. If a device breaks, this could potentially create many thousands of timed out commands. There's nothing of value to be gleaned from observing each of those messages, so this patch adds a rate limit on them. Signed-off-by: Keith Busch <keith.busch@intel.com> Signed-off-by: Christoph Hellwig <hch@lst.de>
2018-05-30nvme: allow duplicate controller if prior controller being deletedJames Smart1-1/+3
The current checks for whether a new controller request "matches" an existing controller ignores controller state and checks identity strings. There are cases where an existing controller may be in its last steps of deletion when they are "matched" by a new connection. Change the behavior so that the new connection ignores controllers that are deleted. Signed-off-by: James Smart <james.smart@broadcom.com> Signed-off-by: Christoph Hellwig <hch@lst.de>
2018-05-29block: remove parent device reference from struct bsg_class_deviceChristoph Hellwig3-18/+10
Bsg holding a reference to the parent device may result in a crash if a bsg file handle is closed after the parent device driver has unloaded. Holding a reference is not really needed: the parent device must exist between bsg_register_queue and bsg_unregister_queue. Before the device goes away the caller does blk_cleanup_queue so that all in-flight requests to the device are gone and all new requests cannot pass beyond the queue. The queue itself is a refcounted object and it will stay alive with a bsg file. Based on analysis, previous patch and changelog from Anatoliy Glagolev. Reported-by: Anatoliy Glagolev <glagolig@gmail.com> Reviewed-by: James E.J. Bottomley <jejb@linux.vnet.ibm.com> Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Jens Axboe <axboe@kernel.dk>
2018-05-29Merge branch 'nvme-4.18-2' of git://git.infradead.org/nvme into for-4.18/blockJens Axboe16-119/+457
Pull NVMe changes from Christoph: "Here is the current batch of nvme updates for 4.18, we have a few more patches in the queue, but I'd like to get this pile into your tree and linux-next ASAP. The biggest item is support for file-backed namespaces in the NVMe target from Chaitanya, in addition to that we mostly small fixes from all the usual suspects." * 'nvme-4.18-2' of git://git.infradead.org/nvme: nvme: fixup memory leak in nvme_init_identify() nvme: fix KASAN warning when parsing host nqn nvmet-loop: use nr_phys_segments when map rq to sgl nvmet-fc: increase LS buffer count per fc port nvmet: add simple file backed ns support nvmet: remove duplicate NULL initialization for req->ns nvmet: make a few error messages more generic nvme-fabrics: allow duplicate connections to the discovery controller nvme-fabrics: centralize discovery controller defaults nvme-fabrics: remove unnecessary controller subnqn validation nvme-fc: remove setting DNR on exception conditions nvme-rdma: stop admin queue before freeing it nvme-pci: Fix AER reset handling nvme-pci: set nvmeq->cq_vector after alloc cq/sq nvme: host: core: fix precedence of ternary operator nvme: fix lockdep warning in nvme_mpath_clear_current_path
2018-05-29libiscsi: don't try to bypass SCSI EHChristoph Hellwig1-2/+2
libiscsi is the only SCSI code that return BLK_EH_HANDLED, thus trying to bypass the normal SCSI EH code. We are going to remove this return value at the block layer, and at least from a quick look it doesn't look too harmful to try to send an abort for these cases, especially as the first one should not actually be possible. If this doesn't work out iscsi will probably need its own eh_strategy_handler instead to just do the right thing. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Hannes Reinecke <hare@suse.com> Signed-off-by: Jens Axboe <axboe@kernel.dk>
2018-05-29mmc: complete requests from ->timeoutChristoph Hellwig1-2/+3
By completing the request entirely in the driver we can remove the BLK_EH_HANDLED return value and thus the split responsibility between the driver and the block layer that has been causing trouble. [While this keeps existing behavior it seems to mismatch the comment, maintainers please chime in!] Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Hannes Reinecke <hare@suse.com> Signed-off-by: Jens Axboe <axboe@kernel.dk>
2018-05-29scsi_transport_fc: complete requests from ->timeoutChristoph Hellwig1-4/+3
By completing the request entirely in the driver we can remove the BLK_EH_HANDLED return value and thus the split responsibility between the driver and the block layer that has been causing trouble. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Hannes Reinecke <hare@suse.com> Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de> Signed-off-by: Jens Axboe <axboe@kernel.dk>
2018-05-29null_blk: complete requests from ->timeoutChristoph Hellwig1-2/+4
By completing the request entirely in the driver we can remove the BLK_EH_HANDLED return value and thus the split responsibility between the driver and the block layer that has been causing trouble. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Hannes Reinecke <hare@suse.com> Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de> Signed-off-by: Jens Axboe <axboe@kernel.dk>
2018-05-29mtip32xx: complete requests from ->timeoutChristoph Hellwig1-1/+2
By completing the request entirely in the driver we can remove the BLK_EH_HANDLED return value and thus the split responsibility between the driver and the block layer that has been causing trouble. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Hannes Reinecke <hare@suse.com> Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de> Signed-off-by: Jens Axboe <axboe@kernel.dk>
2018-05-29nbd: complete requests from ->timeoutChristoph Hellwig1-3/+4
By completing the request entirely in the driver we can remove the BLK_EH_HANDLED return value and thus the split responsibility between the driver and the block layer that has been causing trouble. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Hannes Reinecke <hare@suse.com> Signed-off-by: Jens Axboe <axboe@kernel.dk>
2018-05-29nvme: return BLK_EH_DONE from ->timeoutChristoph Hellwig3-11/+7
NVMe always completes the request before returning from ->timeout, either by polling for it, or by disabling the controller. Return BLK_EH_DONE so that the block layer doesn't even try to complete it again. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Hannes Reinecke <hare@suse.com> Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de> Signed-off-by: Jens Axboe <axboe@kernel.dk>
2018-05-29block: rename BLK_EH_NOT_HANDLED to BLK_EH_DONEChristoph Hellwig12-19/+19
The BLK_EH_NOT_HANDLED implies nothing happen, but very often that is not what is happening - instead the driver already completed the command. Fix the symbolic name to reflect that a little better. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Hannes Reinecke <hare@suse.com> Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de> Signed-off-by: Jens Axboe <axboe@kernel.dk>
2018-05-29libata: remove ata_scsi_timed_outChristoph Hellwig1-51/+0
As far as I can tell this function can't even be called any more, given that ATA implements its own eh_strategy_handler with ata_scsi_error, which never calls ->eh_timed_out. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Hannes Reinecke <hare@suse.com> Signed-off-by: Jens Axboe <axboe@kernel.dk>
2018-05-28bcache: Replace bch_read_string_list() by __sysfs_match_string()Andy Shevchenko1-35/+9
Kernel library has a common function to match user input from sysfs against an array of strings. Thus, replace bch_read_string_list() by __sysfs_match_string(). Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Signed-off-by: Coly Li <colyli@suse.de> Signed-off-by: Jens Axboe <axboe@kernel.dk>
2018-05-28bcache: Move couple of functions to sysfs.cAndy Shevchenko3-40/+35
There is couple of functions that are used exclusively in sysfs.c. Move it to there and make them static. Besides above, it will allow further clean up. No functional change intended. Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Signed-off-by: Coly Li <colyli@suse.de> Signed-off-by: Jens Axboe <axboe@kernel.dk>
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