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2019-05-07block: fix mismerge in bvec_advanceChristoph Hellwig1-7/+1
When Jens merged my commit to only allow contiguous page structs in a bio_vec with Ming's 5.1 fix to ensue the bvec length didn't overflow we failed to keep the removal of the expensive nth_page calls. This commits adds them back as intended. Fixes: 5c61ee2cd586 ("Merge tag 'v5.1-rc6' into for-5.2/block") Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Jens Axboe <axboe@kernel.dk>
2019-05-04block: don't drain in-progress dispatch in blk_cleanup_queue()Ming Lei1-12/+0
Now freeing hw queue resource is moved to hctx's release handler, we don't need to worry about the race between blk_cleanup_queue and run queue any more. So don't drain in-progress dispatch in blk_cleanup_queue(). This is basically revert of c2856ae2f315 ("blk-mq: quiesce queue before freeing queue"). Cc: Dongli Zhang <dongli.zhang@oracle.com> Cc: James Smart <james.smart@broadcom.com> Cc: Bart Van Assche <bart.vanassche@wdc.com> Cc: linux-scsi@vger.kernel.org, Cc: Martin K . Petersen <martin.petersen@oracle.com>, Cc: Christoph Hellwig <hch@lst.de>, Cc: James E . J . Bottomley <jejb@linux.vnet.ibm.com>, Reviewed-by: Bart Van Assche <bvanassche@acm.org> Reviewed-by: Hannes Reinecke <hare@suse.com> Tested-by: James Smart <james.smart@broadcom.com> Signed-off-by: Ming Lei <ming.lei@redhat.com> Signed-off-by: Jens Axboe <axboe@kernel.dk>
2019-05-04blk-mq: move cancel of hctx->run_work into blk_mq_hw_sysfs_releaseMing Lei2-8/+2
hctx is always released after requeue is freed. With holding queue's kobject refcount, it is safe for driver to run queue, so one run queue might be scheduled after blk_sync_queue() is done. So moving the cancel of hctx->run_work into blk_mq_hw_sysfs_release() for avoiding run released queue. Cc: Dongli Zhang <dongli.zhang@oracle.com> Cc: James Smart <james.smart@broadcom.com> Cc: Bart Van Assche <bart.vanassche@wdc.com> Cc: linux-scsi@vger.kernel.org, Cc: Martin K . Petersen <martin.petersen@oracle.com>, Cc: Christoph Hellwig <hch@lst.de>, Cc: James E . J . Bottomley <jejb@linux.vnet.ibm.com>, Reviewed-by: Bart Van Assche <bvanassche@acm.org> Reviewed-by: Hannes Reinecke <hare@suse.com> Tested-by: James Smart <james.smart@broadcom.com> Signed-off-by: Ming Lei <ming.lei@redhat.com> Signed-off-by: Jens Axboe <axboe@kernel.dk>
2019-05-04blk-mq: always free hctx after request queue is freedMing Lei3-13/+42
In normal queue cleanup path, hctx is released after request queue is freed, see blk_mq_release(). However, in __blk_mq_update_nr_hw_queues(), hctx may be freed because of hw queues shrinking. This way is easy to cause use-after-free, because: one implicit rule is that it is safe to call almost all block layer APIs if the request queue is alive; and one hctx may be retrieved by one API, then the hctx can be freed by blk_mq_update_nr_hw_queues(); finally use-after-free is triggered. Fixes this issue by always freeing hctx after releasing request queue. If some hctxs are removed in blk_mq_update_nr_hw_queues(), introduce a per-queue list to hold them, then try to resuse these hctxs if numa node is matched. Cc: Dongli Zhang <dongli.zhang@oracle.com> Cc: James Smart <james.smart@broadcom.com> Cc: Bart Van Assche <bart.vanassche@wdc.com> Cc: linux-scsi@vger.kernel.org, Cc: Martin K . Petersen <martin.petersen@oracle.com>, Cc: Christoph Hellwig <hch@lst.de>, Cc: James E . J . Bottomley <jejb@linux.vnet.ibm.com>, Reviewed-by: Hannes Reinecke <hare@suse.com> Tested-by: James Smart <james.smart@broadcom.com> Signed-off-by: Ming Lei <ming.lei@redhat.com> Signed-off-by: Jens Axboe <axboe@kernel.dk>
2019-05-04blk-mq: split blk_mq_alloc_and_init_hctx into two partsMing Lei1-64/+75
Split blk_mq_alloc_and_init_hctx into two parts, and one is blk_mq_alloc_hctx() for allocating all hctx resources, another is blk_mq_init_hctx() for initializing hctx, which serves as counter-part of blk_mq_exit_hctx(). Cc: Dongli Zhang <dongli.zhang@oracle.com> Cc: James Smart <james.smart@broadcom.com> Cc: Bart Van Assche <bart.vanassche@wdc.com> Cc: linux-scsi@vger.kernel.org Cc: Martin K . Petersen <martin.petersen@oracle.com> Cc: Christoph Hellwig <hch@lst.de> Cc: James E . J . Bottomley <jejb@linux.vnet.ibm.com> Reviewed-by: Hannes Reinecke <hare@suse.com> Reviewed-by: Christoph Hellwig <hch@lst.de> Tested-by: James Smart <james.smart@broadcom.com> Signed-off-by: Ming Lei <ming.lei@redhat.com> Signed-off-by: Jens Axboe <axboe@kernel.dk>
2019-05-04blk-mq: free hw queue's resource in hctx's release handlerMing Lei4-8/+10
Once blk_cleanup_queue() returns, tags shouldn't be used any more, because blk_mq_free_tag_set() may be called. Commit 45a9c9d909b2 ("blk-mq: Fix a use-after-free") fixes this issue exactly. However, that commit introduces another issue. Before 45a9c9d909b2, we are allowed to run queue during cleaning up queue if the queue's kobj refcount is held. After that commit, queue can't be run during queue cleaning up, otherwise oops can be triggered easily because some fields of hctx are freed by blk_mq_free_queue() in blk_cleanup_queue(). We have invented ways for addressing this kind of issue before, such as: 8dc765d438f1 ("SCSI: fix queue cleanup race before queue initialization is done") c2856ae2f315 ("blk-mq: quiesce queue before freeing queue") But still can't cover all cases, recently James reports another such kind of issue: https://marc.info/?l=linux-scsi&m=155389088124782&w=2 This issue can be quite hard to address by previous way, given scsi_run_queue() may run requeues for other LUNs. Fixes the above issue by freeing hctx's resources in its release handler, and this way is safe becasue tags isn't needed for freeing such hctx resource. This approach follows typical design pattern wrt. kobject's release handler. Cc: Dongli Zhang <dongli.zhang@oracle.com> Cc: James Smart <james.smart@broadcom.com> Cc: Bart Van Assche <bart.vanassche@wdc.com> Cc: linux-scsi@vger.kernel.org, Cc: Martin K . Petersen <martin.petersen@oracle.com>, Cc: Christoph Hellwig <hch@lst.de>, Cc: James E . J . Bottomley <jejb@linux.vnet.ibm.com>, Reported-by: James Smart <james.smart@broadcom.com> Fixes: 45a9c9d909b2 ("blk-mq: Fix a use-after-free") Cc: stable@vger.kernel.org Reviewed-by: Hannes Reinecke <hare@suse.com> Reviewed-by: Christoph Hellwig <hch@lst.de> Tested-by: James Smart <james.smart@broadcom.com> Signed-off-by: Ming Lei <ming.lei@redhat.com> Signed-off-by: Jens Axboe <axboe@kernel.dk>
2019-05-04blk-mq: move cancel of requeue_work into blk_mq_releaseMing Lei2-1/+2
With holding queue's kobject refcount, it is safe for driver to schedule requeue. However, blk_mq_kick_requeue_list() may be called after blk_sync_queue() is done because of concurrent requeue activities, then requeue work may not be completed when freeing queue, and kernel oops is triggered. So moving the cancel of requeue_work into blk_mq_release() for avoiding race between requeue and freeing queue. Cc: Dongli Zhang <dongli.zhang@oracle.com> Cc: James Smart <james.smart@broadcom.com> Cc: Bart Van Assche <bart.vanassche@wdc.com> Cc: linux-scsi@vger.kernel.org, Cc: Martin K . Petersen <martin.petersen@oracle.com>, Cc: Christoph Hellwig <hch@lst.de>, Cc: James E . J . Bottomley <jejb@linux.vnet.ibm.com>, Reviewed-by: Bart Van Assche <bvanassche@acm.org> Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de> Reviewed-by: Hannes Reinecke <hare@suse.com> Reviewed-by: Christoph Hellwig <hch@lst.de> Tested-by: James Smart <james.smart@broadcom.com> Signed-off-by: Ming Lei <ming.lei@redhat.com> Signed-off-by: Jens Axboe <axboe@kernel.dk>
2019-05-04blk-mq: grab .q_usage_counter when queuing request from plug code pathMing Lei1-1/+11
Just like aio/io_uring, we need to grab 2 refcount for queuing one request, one is for submission, another is for completion. If the request isn't queued from plug code path, the refcount grabbed in generic_make_request() serves for submission. In theroy, this refcount should have been released after the sumission(async run queue) is done. blk_freeze_queue() works with blk_sync_queue() together for avoiding race between cleanup queue and IO submission, given async run queue activities are canceled because hctx->run_work is scheduled with the refcount held, so it is fine to not hold the refcount when running the run queue work function for dispatch IO. However, if request is staggered into plug list, and finally queued from plug code path, the refcount in submission side is actually missed. And we may start to run queue after queue is removed because the queue's kobject refcount isn't guaranteed to be grabbed in flushing plug list context, then kernel oops is triggered, see the following race: blk_mq_flush_plug_list(): blk_mq_sched_insert_requests() insert requests to sw queue or scheduler queue blk_mq_run_hw_queue Because of concurrent run queue, all requests inserted above may be completed before calling the above blk_mq_run_hw_queue. Then queue can be freed during the above blk_mq_run_hw_queue(). Fixes the issue by grab .q_usage_counter before calling blk_mq_sched_insert_requests() in blk_mq_flush_plug_list(). This way is safe because the queue is absolutely alive before inserting request. Cc: Dongli Zhang <dongli.zhang@oracle.com> Cc: James Smart <james.smart@broadcom.com> Cc: linux-scsi@vger.kernel.org, Cc: Martin K . Petersen <martin.petersen@oracle.com>, Cc: Christoph Hellwig <hch@lst.de>, Cc: James E . J . Bottomley <jejb@linux.vnet.ibm.com>, Reviewed-by: Bart Van Assche <bvanassche@acm.org> Tested-by: James Smart <james.smart@broadcom.com> Signed-off-by: Ming Lei <ming.lei@redhat.com> Signed-off-by: Jens Axboe <axboe@kernel.dk>
2019-05-02Merge branch 'nvme-5.2' of git://git.infradead.org/nvme into for-5.2/blockJens Axboe7-31/+59
Pull NVMe updates from Christoph. * 'nvme-5.2' of git://git.infradead.org/nvme: nvmet: protect discovery change log event list iteration nvme: mark nvme_core_init and nvme_core_exit static nvme: move command size checks to the core nvme-fabrics: check more command sizes nvme-pci: check more command sizes nvme-pci: remove an unneeded variable initialization nvme-pci: unquiesce admin queue on shutdown nvme-pci: shutdown on timeout during deletion nvme-pci: fix psdt field for single segment sgls nvme-multipath: don't print ANA group state by default nvme-multipath: split bios with the ns_head bio_set before submitting nvme-tcp: fix possible null deref on a timed out io queue connect
2019-05-02block: fix function name in commentRaul E Rangel1-1/+1
The comment was out of date. Reviewed-by: Bart Van Assche <bvanassche@acm.org> Signed-off-by: Raul E Rangel <rrangel@chromium.org> Signed-off-by: Jens Axboe <axboe@kernel.dk>
2019-05-01nvmet: protect discovery change log event list iterationSagi Grimberg1-0/+5
When we iterate on the discovery subsystem controllers we need to protect against concurrent mutations to it. Signed-off-by: Sagi Grimberg <sagi@grimberg.me> Reviewed-by: Minwoo Im <minwoo.im@samsung.com> Signed-off-by: Christoph Hellwig <hch@lst.de>
2019-05-01nvme: mark nvme_core_init and nvme_core_exit staticChristoph Hellwig2-5/+2
Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Bart Van Assche <bvanassche@acm.org> Reviewed-by: Keith Busch <keith.busch@intel.com> Reviewed-by: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com>
2019-05-01nvme: move command size checks to the coreChristoph Hellwig2-28/+30
Most command aren't PCIe specific, so move the size checking for them to core.c Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Bart Van Assche <bvanassche@acm.org> Reviewed-by: Keith Busch <keith.busch@intel.com> Reviewed-by: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com>
2019-05-01nvme-fabrics: check more command sizesMinwoo Im1-0/+1
struct common_command provides a common structure for NVMe-oF command format. It also needs to be checked for unintended size growth. Signed-off-by: Minwoo Im <minwoo.im.dev@gmail.com> Reviewed-by: Sagi Grimberg <sagi@grimberg.me> Reviewed-by: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com> Signed-off-by: Christoph Hellwig <hch@lst.de>
2019-05-01nvme-pci: check more command sizesMinwoo Im1-0/+7
All the NVMe command has 64bytes fixed size so that it has been assured with BUILD_BUG_ON(). The remaining command structures in linux/nvme.h also need to be checked here. Signed-off-by: Minwoo Im <minwoo.im.dev@gmail.com> Reviewed-by: Sagi Grimberg <sagi@grimberg.me> Reviewed-by: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com> Signed-off-by: Christoph Hellwig <hch@lst.de>
2019-05-01nvme-pci: remove an unneeded variable initializationMinwoo Im1-1/+1
Variable "n" will be assigned once kstrtoint() succeeds, otherwise it will not be referred because kstrtoint() will return an error which means go out from this function. Signed-off-by: Minwoo Im <minwoo.im.dev@gmail.com> Signed-off-by: Christoph Hellwig <hch@lst.de>
2019-05-01nvme-pci: unquiesce admin queue on shutdownKeith Busch1-1/+4
Just like IO queues, the admin queue also will not be restarted after a controller shutdown. Unquiesce this queue so that we do not block request dispatch on a permanently disabled controller. Reported-by: Yufen Yu <yuyufen@huawei.com> Signed-off-by: Keith Busch <keith.busch@intel.com> Signed-off-by: Christoph Hellwig <hch@lst.de>
2019-05-01nvme-pci: shutdown on timeout during deletionKeith Busch1-1/+4
We do not restart a controller in a deleting state for timeout errors. When in this state, unblock potential request dispatchers with failed completions by shutting down the controller on timeout detection. Reported-by: Yufen Yu <yuyufen@huawei.com> Signed-off-by: Keith Busch <keith.busch@intel.com> Signed-off-by: Christoph Hellwig <hch@lst.de>
2019-05-01nvme-pci: fix psdt field for single segment sglsKlaus Birkelund Jensen1-0/+1
The shortcut for single segment SGL requests did not set the PSDT field to mark the request as using SGLs. Fixes: 297910571f08 ("nvme-pci: optimize mapping single segment requests using SGLs") Signed-off-by: Klaus Birkelund Jensen <klaus.jensen@cnexlabs.com> Signed-off-by: Christoph Hellwig <hch@lst.de>
2019-05-01nvme-multipath: don't print ANA group state by defaultHannes Reinecke1-1/+1
Signed-off-by: Hannes Reinecke <hare@suse.com> Signed-off-by: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com> Reviewed-by: Sagi Grimberg <sagi@grimberg.me> Signed-off-by: Christoph Hellwig <hch@lst.de>
2019-05-01nvme-multipath: split bios with the ns_head bio_set before submittingHannes Reinecke1-0/+8
If the bio is moved to a different queue via blk_steal_bios() and the original queue is destroyed in nvme_remove_ns() we'll be ending with a crash in bio_endio() as the mempool for the split bio bvecs had already been destroyed. So split the bio using the original queue (which will remain during the lifetime of the bio) before sending it down to the underlying device. Signed-off-by: Hannes Reinecke <hare@suse.com> Reviewed-by: Ming Lei <ming.lei@redhat.com> Signed-off-by: Christoph Hellwig <hch@lst.de>
2019-05-01nvme-tcp: fix possible null deref on a timed out io queue connectSagi Grimberg1-1/+2
If I/O queue connect times out, we might have freed the queue socket already, so check for that on the error path in nvme_tcp_start_queue. Signed-off-by: Sagi Grimberg <sagi@grimberg.me> Signed-off-by: Christoph Hellwig <hch@lst.de>
2019-05-01bcache: make is_discard_enabled() staticJens Axboe1-1/+1
It's not used outside this file. Fixes: 631207314d88 ("bcache: fix failure in journal relplay") Signed-off-by: Jens Axboe <axboe@kernel.dk>
2019-04-30block: remove the unused blk_queue_dma_pad functionChristoph Hellwig2-17/+0
Reviewed-by: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com> Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Jens Axboe <axboe@kernel.dk>
2019-04-30block: add SPDX tags to block layer files missing licensing informationChristoph Hellwig31-0/+32
Various block layer files do not have any licensing information at all. Add SPDX tags for the default kernel GPLv2 license to those. Reviewed-by: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com> Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Jens Axboe <axboe@kernel.dk>
2019-04-30block: add a SPDX tag to blk-mq-rdma.hChristoph Hellwig1-0/+1
This file has no copyright notice, but was added as part of a commit adding another file using the default kernel GPLv2 license. Add a matching SPDX tag. Reviewed-by: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com> Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Jens Axboe <axboe@kernel.dk>
2019-04-30sed-opal.h: remove redundant licence boilerplateChristoph Hellwig1-9/+0
The file already has the correct SPDX header. Reviewed-by: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com> Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Jens Axboe <axboe@kernel.dk>
2019-04-30block: switch all files cleared marked as GPLv2 or later to SPDX tagsChristoph Hellwig10-130/+10
All these files have some form of the usual GPLv2 or later boilerplate. Switch them to use SPDX tags instead. Reviewed-by: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com> Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Jens Axboe <axboe@kernel.dk>
2019-04-30block: switch all files cleared marked as GPLv2 to SPDX tagsChristoph Hellwig19-208/+19
All these files have some form of the usual GPLv2 boilerplate. Switch them to use SPDX tags instead. Reviewed-by: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com> Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Jens Axboe <axboe@kernel.dk>
2019-04-30block: clean up __bio_add_pc_page a bitChristoph Hellwig1-6/+5
Share the bi_size update by moving the done label up, and duplicate the bv_len update in the two callers to get rid of the bvec_merge label. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Jens Axboe <axboe@kernel.dk>
2019-04-30block: remove bogus comments in __bio_add_pc_pageChristoph Hellwig1-9/+0
We are never called with file system pages by defintions for the passthrough interface, and we also never undo any addition later these days. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Jens Axboe <axboe@kernel.dk>
2019-04-30block: remove the __bio_add_pc_page exportChristoph Hellwig2-5/+1
The same page optimization is a rather odd corner case, which is not used outside bio.c and which really should not be used outside of bio.c either - we have better highlevel helpers like the rq/bio mapping helpers. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Jens Axboe <axboe@kernel.dk>
2019-04-30block: remove the i argument to bio_for_each_segment_allChristoph Hellwig24-81/+47
We only have two callers that need the integer loop iterator, and they can easily maintain it themselves. Suggested-by: Matthew Wilcox <willy@infradead.org> Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de> Acked-by: David Sterba <dsterba@suse.com> Reviewed-by: Hannes Reinecke <hare@suse.com> Acked-by: Coly Li <colyli@suse.de> Reviewed-by: Matthew Wilcox <willy@infradead.org> Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Jens Axboe <axboe@kernel.dk>
2019-04-30bcache: clean up do_btree_node_write a bitChristoph Hellwig1-4/+5
Use a variable containing the buffer address instead of the to be removed integer iterator from bio_for_each_segment_all. Suggested-by: Matthew Wilcox <willy@infradead.org> Reviewed-by: Hannes Reinecke <hare@suse.com> Acked-by: Coly Li <colyli@suse.de> Reviewed-by: Matthew Wilcox <willy@infradead.org> Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Jens Axboe <axboe@kernel.dk>
2019-04-30bcache: remove redundant LIST_HEAD(journal) from run_cache_set()Coly Li1-1/+0
Commit 95f18c9d1310 ("bcache: avoid potential memleak of list of journal_replay(s) in the CACHE_SYNC branch of run_cache_set") forgets to remove the original define of LIST_HEAD(journal), which makes the change no take effect. This patch removes redundant variable LIST_HEAD(journal) from run_cache_set(), to make Shenghui's fix working. Fixes: 95f18c9d1310 ("bcache: avoid potential memleak of list of journal_replay(s) in the CACHE_SYNC branch of run_cache_set") Reported-by: Juha Aatrokoski <juha.aatrokoski@aalto.fi> Cc: Shenghui Wang <shhuiw@foxmail.com> Signed-off-by: Coly Li <colyli@suse.de> Signed-off-by: Jens Axboe <axboe@kernel.dk>
2019-04-26Merge branch 'nvme-5.2' of git://git.infradead.org/nvme into for-5.2/blockJens Axboe15-84/+77
Pull NVMe changes from Christoph. * 'nvme-5.2' of git://git.infradead.org/nvme: nvme: set 0 capacity if namespace block size exceeds PAGE_SIZE nvme-rdma: fix typo in struct comment nvme-loop: kill timeout handler nvme-tcp: rename function to have nvme_tcp prefix nvme-rdma: fix a NULL deref when an admin connect times out nvme-tcp: fix a NULL deref when an admin connect times out nvmet-tcp: don't fail maxr2t greater than 1 nvmet-file: clamp-down file namespace lba_shift nvmet: include <linux/scatterlist.h> nvmet: return a specified error it subsys_alloc fails nvmet: rename nvme_completion instances from rsp to cqe nvmet-rdma: remove p2p_client initialization from fast-path
2019-04-25mtip32xx: remove trim supportChristoph Hellwig2-106/+0
The trim support in mtip32xx has been "temporarily" disabled for 6 years, which is 3/4 of the time the driver even exists in the tree. Remove it as it obviously is dead code now. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Jens Axboe <axboe@kernel.dk>
2019-04-25nvme: set 0 capacity if namespace block size exceeds PAGE_SIZESagi Grimberg1-1/+6
If our target exposed a namespace with a block size that is greater than PAGE_SIZE, set 0 capacity on the namespace as we do not support it. This issue encountered when the nvmet namespace was backed by a tempfile. Signed-off-by: Sagi Grimberg <sagi@grimberg.me> Reviewed-by: Keith Busch <keith.busch@intel.com> Signed-off-by: Christoph Hellwig <hch@lst.de>
2019-04-25nvme-rdma: fix typo in struct commentMinwoo Im1-1/+1
struct nvme_rdma_cm_rej has two different attributes: recfmt and sts. And sts will have value what this comment wanted to show. Signed-off-by: Minwoo Im <minwoo.im.dev@gmail.com> Reviewed-by: Sagi Grimberg <sagi@grimberg.me> Reviewed-by: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com> Signed-off-by: Christoph Hellwig <hch@lst.de>
2019-04-25nvme-loop: kill timeout handlerMing Lei1-16/+0
Firstly it doesn't make sense to handle timeout for loop: 1) for admin queue, the request is always completed in code path of queuing IO. 2) for normal IO request, the timeout on these IOs have been handled by underlying queue already. Secondly nvme-loop's timeout handler is simply broken, and easy to cause issue: 1) no any sync/protection between timeout and normal completion, and now it is driver's responsibility to deal with that; 2) bad reset implementation, blk_mq_update_nr_hw_queues() is called after all NSs's queue is stopped(quiesced), and easy to trigger deadlock. So kill the timeout handler. Signed-off-by: Ming Lei <ming.lei@redhat.com> Reviewd-by: Keith Busch <keith.busch@intel.com> Reviewed-by: Sagi Grimberg <sagi@grimberg.me> Signed-off-by: Christoph Hellwig <hch@lst.de>
2019-04-25nvme-tcp: rename function to have nvme_tcp prefixSagi Grimberg1-6/+4
usually nvme_ prefix is for core functions. While we're cleaning up, remove redundant empty lines Signed-off-by: Sagi Grimberg <sagi@grimberg.me> Reviewed-by: Minwoo Im <minwoo.im@samsung.com> Signed-off-by: Christoph Hellwig <hch@lst.de>
2019-04-25nvme-rdma: fix a NULL deref when an admin connect times outSagi Grimberg1-4/+6
If we timeout the admin startup sequence we might not yet have an I/O tagset allocated which causes the teardown sequence to crash. Make nvme_tcp_teardown_io_queues safe by not iterating inflight tags if the tagset wasn't allocated. Fixes: 4c174e636674 ("nvme-rdma: fix timeout handler") Signed-off-by: Sagi Grimberg <sagi@grimberg.me> Signed-off-by: Christoph Hellwig <hch@lst.de>
2019-04-25nvme-tcp: fix a NULL deref when an admin connect times outSagi Grimberg1-2/+6
If we timeout the admin startup sequence we might not yet have an I/O tagset allocated which causes the teardown sequence to crash. Make nvme_tcp_teardown_io_queues safe by not iterating inflight tags if the tagset wasn't allocated. Fixes: 39d57757467b ("nvme-tcp: fix timeout handler") Signed-off-by: Sagi Grimberg <sagi@grimberg.me> Signed-off-by: Christoph Hellwig <hch@lst.de>
2019-04-25nvmet-tcp: don't fail maxr2t greater than 1Sagi Grimberg1-6/+0
The host may support it, but nothing prevents us from sending a single r2t at a time like we do anyways. Signed-off-by: Sagi Grimberg <sagi@grimberg.me> Signed-off-by: Christoph Hellwig <hch@lst.de>
2019-04-25nvmet-file: clamp-down file namespace lba_shiftSagi Grimberg1-1/+6
When the backing file is a tempfile for example, the inode i_blkbits can be 1M in size which causes problems for hosts to support as the disk block size. Instead, expose the minimum between i_blkbits and 12 (4K sector size). Signed-off-by: Sagi Grimberg <sagi@grimberg.me> Reviewed-by:- Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com> Signed-off-by: Christoph Hellwig <hch@lst.de>
2019-04-25nvmet: include <linux/scatterlist.h>Enrico Weigelt, metux IT consult2-0/+2
Build breaks: drivers/nvme/target/core.c: In function 'nvmet_req_alloc_sgl': drivers/nvme/target/core.c:939:12: error: implicit declaration of \ function 'sgl_alloc'; did you mean 'bio_alloc'? \ [-Werror=implicit-function-declaration] req->sg = sgl_alloc(req->transfer_len, GFP_KERNEL, &req->sg_cnt); ^~~~~~~~~ bio_alloc drivers/nvme/target/core.c:939:10: warning: assignment makes pointer \ from integer without a cast [-Wint-conversion] req->sg = sgl_alloc(req->transfer_len, GFP_KERNEL, &req->sg_cnt); ^ drivers/nvme/target/core.c: In function 'nvmet_req_free_sgl': drivers/nvme/target/core.c:952:3: error: implicit declaration of \ function 'sgl_free'; did you mean 'ida_free'? [-Werror=implicit-function-declaration] sgl_free(req->sg); ^~~~~~~~ ida_free Cause: 1. missing include to <linux/scatterlist.h> 2. SGL_ALLOC needs to be enabled Therefore adding the missing include, as well as Kconfig dependency. Signed-off-by: Enrico Weigelt, metux IT consult <info@metux.net> Reviewed-by: Sagi Grimberg <sagi@grimberg.me> Reviewed-by: Minwoo Im <minwoo.im@samsung.com> Reviewed-by: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com> Signed-off-by: Christoph Hellwig <hch@lst.de>
2019-04-25nvmet: return a specified error it subsys_alloc failsMinwoo Im3-7/+7
nvmet_subsys_alloc() returns its pointer or NULL if it fails. We can see three different steps in this function: 1. memory allocation 2. argument check 3. memory allocation for string But now the callers of this function do not seem to handle case 2 by returning -ENOMEM only even if it fails with an invalid parameter. This patch specifies error codes so that caller can pass it to its own caller. Signed-off-by: Minwoo Im <minwoo.im.dev@gmail.com> Reviewed-by: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com>. Signed-off-by: Christoph Hellwig <hch@lst.de>
2019-04-25nvmet: rename nvme_completion instances from rsp to cqeMax Gurtovoy7-38/+38
Use NVMe namings for improving code readability. Signed-off-by: Max Gurtovoy <maxg@mellanox.com> Reviewed-by : Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com> Signed-off-by: Christoph Hellwig <hch@lst.de>
2019-04-25nvmet-rdma: remove p2p_client initialization from fast-pathMax Gurtovoy1-2/+1
Initialize it during command allocation. Cc: Logan Gunthorpe <logang@deltatee.com> Cc: Stephen Bates <sbates@raithlin.com> Signed-off-by: Max Gurtovoy <maxg@mellanox.com> Reviewed-by: Logan Gunthorpe <logang@deltatee.com> Signed-off-by: Christoph Hellwig <hch@lst.de>
2019-04-24bcache: avoid potential memleak of list of journal_replay(s) in the ↵Shenghui Wang1-0/+8
CACHE_SYNC branch of run_cache_set In the CACHE_SYNC branch of run_cache_set(), LIST_HEAD(journal) is used to collect journal_replay(s) and filled by bch_journal_read(). If all goes well, bch_journal_replay() will release the list of jounal_replay(s) at the end of the branch. If something goes wrong, code flow will jump to the label "err:" and leave the list unreleased. This patch will release the list of journal_replay(s) in the case of error detected. v1 -> v2: * Move the release code to the location after label 'err:' to simply the change. Signed-off-by: Shenghui Wang <shhuiw@foxmail.com> Signed-off-by: Coly Li <colyli@suse.de> Signed-off-by: Jens Axboe <axboe@kernel.dk>
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