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2020-12-05Merge tag 'block-5.10-2020-12-05' of git://git.kernel.dk/linux-blockLinus Torvalds1-1/+4
Pull block fix from Jens Axboe: "Single fix for an issue with chunk_sectors and stacked devices" * tag 'block-5.10-2020-12-05' of git://git.kernel.dk/linux-block: block: use gcd() to fix chunk_sectors limit stacking
2020-12-04Merge tag 'for-5.10/dm-fixes' of ↵Linus Torvalds1-1/+1
git://git.kernel.org/pub/scm/linux/kernel/git/device-mapper/linux-dm Pull device mapper fixes from Mike Snitzer: - Fix DM's bio splitting changes that were made during v5.9. This restores splitting in terms of varied per-target ti->max_io_len rather than use block core's single stacked 'chunk_sectors' limit. - Like DM crypt, update DM integrity to not use crypto drivers that have CRYPTO_ALG_ALLOCATES_MEMORY set. - Fix DM writecache target's argument parsing and status display. - Remove needless BUG() from dm writecache's persistent_memory_claim() - Remove old gcc workaround in DM cache target's block_div() for ARM link errors now that gcc >= 4.9 is required. - Fix RCU locking in dm_blk_report_zones and dm_dax_zero_page_range. - Remove old, and now frowned upon, BUG_ON(in_interrupt()) in dm_table_event(). - Remove invalid sparse annotations from dm_prepare_ioctl() and dm_unprepare_ioctl(). * tag 'for-5.10/dm-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/device-mapper/linux-dm: dm: remove invalid sparse __acquires and __releases annotations dm: fix double RCU unlock in dm_dax_zero_page_range() error path dm: fix IO splitting dm writecache: remove BUG() and fail gracefully instead dm table: Remove BUG_ON(in_interrupt()) dm: fix bug with RCU locking in dm_blk_report_zones Revert "dm cache: fix arm link errors with inline" dm writecache: fix the maximum number of arguments dm writecache: advance the number of arguments when reporting max_age dm integrity: don't use drivers that have CRYPTO_ALG_ALLOCATES_MEMORY
2020-12-04dm: fix IO splittingMike Snitzer1-1/+1
Commit 882ec4e609c1 ("dm table: stack 'chunk_sectors' limit to account for target-specific splitting") caused a couple regressions: 1) Using lcm_not_zero() when stacking chunk_sectors was a bug because chunk_sectors must reflect the most limited of all devices in the IO stack. 2) DM targets that set max_io_len but that do _not_ provide an .iterate_devices method no longer had there IO split properly. And commit 5091cdec56fa ("dm: change max_io_len() to use blk_max_size_offset()") also caused a regression where DM no longer supported varied (per target) IO splitting. The implication being the potential for severely reduced performance for IO stacks that use a DM target like dm-cache to hide performance limitations of a slower device (e.g. one that requires 4K IO splitting). Coming full circle: Fix all these issues by discontinuing stacking chunk_sectors up using ti->max_io_len in dm_calculate_queue_limits(), add optional chunk_sectors override argument to blk_max_size_offset() and update DM's max_io_len() to pass ti->max_io_len to its blk_max_size_offset() call. Passing in an optional chunk_sectors override to blk_max_size_offset() allows for code reuse of block's centralized calculation for max IO size based on provided offset and split boundary. Fixes: 882ec4e609c1 ("dm table: stack 'chunk_sectors' limit to account for target-specific splitting") Fixes: 5091cdec56fa ("dm: change max_io_len() to use blk_max_size_offset()") Cc: stable@vger.kernel.org Reported-by: John Dorminy <jdorminy@redhat.com> Reported-by: Bruce Johnston <bjohnsto@redhat.com> Reported-by: Kirill Tkhai <ktkhai@virtuozzo.com> Reviewed-by: John Dorminy <jdorminy@redhat.com> Signed-off-by: Mike Snitzer <snitzer@redhat.com> Reviewed-by: Jens Axboe <axboe@kernel.dk>
2020-12-01block: use gcd() to fix chunk_sectors limit stackingMike Snitzer1-1/+4
commit 22ada802ede8 ("block: use lcm_not_zero() when stacking chunk_sectors") broke chunk_sectors limit stacking. chunk_sectors must reflect the most limited of all devices in the IO stack. Otherwise malformed IO may result. E.g.: prior to this fix, ->chunk_sectors = lcm_not_zero(8, 128) would result in blk_max_size_offset() splitting IO at 128 sectors rather than the required more restrictive 8 sectors. And since commit 07d098e6bbad ("block: allow 'chunk_sectors' to be non-power-of-2") care must be taken to properly stack chunk_sectors to be compatible with the possibility that a non-power-of-2 chunk_sectors may be stacked. This is why gcd() is used instead of reverting back to using min_not_zero(). Fixes: 22ada802ede8 ("block: use lcm_not_zero() when stacking chunk_sectors") Fixes: 07d098e6bbad ("block: allow 'chunk_sectors' to be non-power-of-2") Reported-by: John Dorminy <jdorminy@redhat.com> Reported-by: Bruce Johnston <bjohnsto@redhat.com> Signed-off-by: Mike Snitzer <snitzer@redhat.com> Reviewed-by: John Dorminy <jdorminy@redhat.com> Cc: stable@vger.kernel.org Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com> Signed-off-by: Jens Axboe <axboe@kernel.dk>
2020-11-20block/keyslot-manager: prevent crash when num_slots=1Eric Biggers1-0/+7
If there is only one keyslot, then blk_ksm_init() computes slot_hashtable_size=1 and log_slot_ht_size=0. This causes blk_ksm_find_keyslot() to crash later because it uses hash_ptr(key, log_slot_ht_size) to find the hash bucket containing the key, and hash_ptr() doesn't support the bits == 0 case. Fix this by making the hash table always have at least 2 buckets. Tested by running: kvm-xfstests -c ext4 -g encrypt -m inlinecrypt \ -o blk-crypto-fallback.num_keyslots=1 Fixes: 1b2628397058 ("block: Keyslot Manager for Inline Encryption") Signed-off-by: Eric Biggers <ebiggers@google.com> Signed-off-by: Jens Axboe <axboe@kernel.dk>
2020-11-14blk-cgroup: fix a hd_struct leak in blkcg_fill_root_iostatsChristoph Hellwig1-0/+1
disk_get_part needs to be paired with a disk_put_part. Cc: stable@vger.kernel.org Fixes: ef45fe470e1 ("blk-cgroup: show global disk stats in root cgroup io.stat") Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Jens Axboe <axboe@kernel.dk>
2020-11-13block: mark flush request as IDLE when it is really finishedMing Lei1-1/+6
For avoiding use-after-free on flush request, we call its .end_io() from both timeout code path and __blk_mq_end_request(). When flush request's ref doesn't drop to zero, it is still used, we can't mark it as IDLE, so fix it by marking IDLE when its refcount drops to zero really. Fixes: 65ff5cd04551 ("blk-mq: mark flush request as IDLE in flush_end_io()") Signed-off-by: Ming Lei <ming.lei@redhat.com> Cc: Yi Zhang <yi.zhang@redhat.com> Signed-off-by: Jens Axboe <axboe@kernel.dk>
2020-11-12block: add a return value to set_capacity_revalidate_and_notifyChristoph Hellwig1-1/+4
Return if the function ended up sending an uevent or not. Cc: stable@vger.kernel.org # v5.9 Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Petr Vorel <pvorel@suse.cz> Signed-off-by: Jens Axboe <axboe@kernel.dk>
2020-10-30blk-mq: mark flush request as IDLE in flush_end_io()Ming Lei1-0/+1
Mark flush request as IDLE in its .end_io(), aligning it with how normal requests behave. The flush request stays in in-flight tags if we're not using an IO scheduler, so we need to change its state into IDLE. Otherwise, we will hang in blk_mq_tagset_wait_completed_request() during error recovery because flush the request state is kept as COMPLETED. Reported-by: Yi Zhang <yi.zhang@redhat.com> Signed-off-by: Ming Lei <ming.lei@redhat.com> Tested-by: Yi Zhang <yi.zhang@redhat.com> Cc: Chao Leng <lengchao@huawei.com> Cc: Sagi Grimberg <sagi@grimberg.me> Signed-off-by: Jens Axboe <axboe@kernel.dk>
2020-10-28block: advance iov_iter on bio_add_hw_page failureNaohiro Aota1-4/+7
When the bio's size reaches max_append_sectors, bio_add_hw_page returns 0 then __bio_iov_append_get_pages returns -EINVAL. This is an expected result of building a small enough bio not to be split in the IO path. However, iov_iter is not advanced in this case, causing the same pages are filled for the bio again and again. Fix the case by properly advancing the iov_iter for already processed pages. Fixes: 0512a75b98f8 ("block: Introduce REQ_OP_ZONE_APPEND") Cc: stable@vger.kernel.org # 5.8+ Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com> Signed-off-by: Naohiro Aota <naohiro.aota@wdc.com> Signed-off-by: Jens Axboe <axboe@kernel.dk>
2020-10-26blk-cgroup: Pre-allocate tree node on blkg_conf_prepGabriel Krisman Bertazi1-2/+12
Similarly to commit 457e490f2b741 ("blkcg: allocate struct blkcg_gq outside request queue spinlock"), blkg_create can also trigger occasional -ENOMEM failures at the radix insertion because any allocation inside blkg_create has to be non-blocking, making it more likely to fail. This causes trouble for userspace tools trying to configure io weights who need to deal with this condition. This patch reduces the occurrence of -ENOMEMs on this path by preloading the radix tree element on a GFP_KERNEL context, such that we guarantee the later non-blocking insertion won't fail. A similar solution exists in blkcg_init_queue for the same situation. Acked-by: Tejun Heo <tj@kernel.org> Signed-off-by: Gabriel Krisman Bertazi <krisman@collabora.com> Signed-off-by: Jens Axboe <axboe@kernel.dk>
2020-10-26blk-cgroup: Fix memleak on error pathGabriel Krisman Bertazi1-0/+1
If new_blkg allocation raced with blk_policy change and blkg_lookup_check fails, new_blkg is leaked. Acked-by: Tejun Heo <tj@kernel.org> Signed-off-by: Gabriel Krisman Bertazi <krisman@collabora.com> Signed-off-by: Jens Axboe <axboe@kernel.dk>
2020-10-24Merge tag 'block-5.10-2020-10-24' of git://git.kernel.dk/linux-blockLinus Torvalds3-3/+7
Pull block fixes from Jens Axboe: - NVMe pull request from Christoph - rdma error handling fixes (Chao Leng) - fc error handling and reconnect fixes (James Smart) - fix the qid displace when tracing ioctl command (Keith Busch) - don't use BLK_MQ_REQ_NOWAIT for passthru (Chaitanya Kulkarni) - fix MTDT for passthru (Logan Gunthorpe) - blacklist Write Same on more devices (Kai-Heng Feng) - fix an uninitialized work struct (zhenwei pi)" - lightnvm out-of-bounds fix (Colin) - SG allocation leak fix (Doug) - rnbd fixes (Gioh, Guoqing, Jack) - zone error translation fixes (Keith) - kerneldoc markup fix (Mauro) - zram lockdep fix (Peter) - Kill unused io_context members (Yufen) - NUMA memory allocation cleanup (Xianting) - NBD config wakeup fix (Xiubo) * tag 'block-5.10-2020-10-24' of git://git.kernel.dk/linux-block: (27 commits) block: blk-mq: fix a kernel-doc markup nvme-fc: shorten reconnect delay if possible for FC nvme-fc: wait for queues to freeze before calling update_hr_hw_queues nvme-fc: fix error loop in create_hw_io_queues nvme-fc: fix io timeout to abort I/O null_blk: use zone status for max active/open nvmet: don't use BLK_MQ_REQ_NOWAIT for passthru nvmet: cleanup nvmet_passthru_map_sg() nvmet: limit passthru MTDS by BIO_MAX_PAGES nvmet: fix uninitialized work for zero kato nvme-pci: disable Write Zeroes on Sandisk Skyhawk nvme: use queuedata for nvme_req_qid nvme-rdma: fix crash due to incorrect cqe nvme-rdma: fix crash when connect rejected block: remove unused members for io_context blk-mq: remove the calling of local_memory_node() zram: Fix __zram_bvec_{read,write}() locking order skd_main: remove unused including <linux/version.h> sgl_alloc_order: fix memory leak lightnvm: fix out-of-bounds write to array devices->info[] ...
2020-10-23block: blk-mq: fix a kernel-doc markupMauro Carvalho Chehab1-1/+1
Fix a typo: blk_mq_run_hw_queue -> blk_mq_run_hw_queues Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org> Signed-off-by: Jens Axboe <axboe@kernel.dk>
2020-10-20blk-mq: remove the calling of local_memory_node()Xianting Tian2-2/+2
We don't need to check whether the node is memoryless numa node before calling allocator interface. SLUB(and SLAB,SLOB) relies on the page allocator to pick a node. Page allocator should deal with memoryless nodes just fine. It has zonelists constructed for each possible nodes. And it will automatically fall back into a node which is closest to the requested node. As long as __GFP_THISNODE is not enforced of course. The code comments of kmem_cache_alloc_node() of SLAB also showed this: * Fallback to other node is possible if __GFP_THISNODE is not set. blk-mq code doesn't set __GFP_THISNODE, so we can remove the calling of local_memory_node(). Signed-off-by: Xianting Tian <tian.xianting@h3c.com> Signed-off-by: Jens Axboe <axboe@kernel.dk>
2020-10-15docs: bio: fix a kerneldoc markupMauro Carvalho Chehab1-1/+1
Fix this warning: ./block/bio.c:1098: WARNING: Inline emphasis start-string without end-string. The thing is that *iter is not a valid markup. That seems to be a typo: *iter -> @iter Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
2020-10-15block: bio: fix a warning at the kernel-doc markupsMauro Carvalho Chehab1-1/+1
Using "@bio's parent" causes the following waring: ./block/bio.c:10: WARNING: Inline emphasis start-string without end-string. The main problem here is that this would be converted into: **bio**'s parent By kernel-doc, which is not a valid notation. It would be possible to use, instead, this kernel-doc markup: ``bio's`` parent Yet, here, is probably simpler to just use an altenative language: the parent of @bio Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
2020-10-14Merge tag 'for-5.10/dm-changes' of ↵Linus Torvalds1-1/+0
git://git.kernel.org/pub/scm/linux/kernel/git/device-mapper/linux-dm Pull device mapper updates from Mike Snitzer: - Improve DM core's bio splitting to use blk_max_size_offset(). Also fix bio splitting for bios that were deferred to the worker thread due to a DM device being suspended. - Remove DM core's special handling of NVMe devices now that block core has internalized efficiencies drivers previously needed to be concerned about (via now removed direct_make_request). - Fix request-based DM to not bounce through indirect dm_submit_bio; instead have block core make direct call to blk_mq_submit_bio(). - Various DM core cleanups to simplify and improve code. - Update DM cryot to not use drivers that set CRYPTO_ALG_ALLOCATES_MEMORY. - Fix DM raid's raid1 and raid10 discard limits for the purposes of linux-stable. But then remove DM raid's discard limits settings now that MD raid can efficiently handle large discards. - A couple small cleanups across various targets. * tag 'for-5.10/dm-changes' of git://git.kernel.org/pub/scm/linux/kernel/git/device-mapper/linux-dm: dm: fix request-based DM to not bounce through indirect dm_submit_bio dm: remove special-casing of bio-based immutable singleton target on NVMe dm: export dm_copy_name_and_uuid dm: fix comment in __dm_suspend() dm: fold dm_process_bio() into dm_submit_bio() dm: fix missing imposition of queue_limits from dm_wq_work() thread dm snap persistent: simplify area_io() dm thin metadata: Remove unused local variable when create thin and snap dm raid: remove unnecessary discard limits for raid10 dm raid: fix discard limits for raid1 and raid10 dm crypt: don't use drivers that have CRYPTO_ALG_ALLOCATES_MEMORY dm: use dm_table_get_device_name() where appropriate in targets dm table: make 'struct dm_table' definition accessible to all of DM core dm: eliminate need for start_io_acct() forward declaration dm: simplify __process_abnormal_io() dm: push use of on-stack flush_bio down to __send_empty_flush() dm: optimize max_io_len() by inlining max_io_len_target_boundary() dm: push md->immutable_target optimization down to __process_bio() dm: change max_io_len() to use blk_max_size_offset() dm table: stack 'chunk_sectors' limit to account for target-specific splitting
2020-10-13block: add zone specific block statusesKeith Busch1-0/+4
A zoned device with limited resources to open or activate zones may return an error when the host exceeds those limits. The same command may be successful if retried later, but the host needs to wait for specific zone states before it should expect a retry to succeed. Have the block layer provide an appropriate status for these conditions so applications can distinuguish this error for special handling. Cc: linux-api@vger.kernel.org Cc: Niklas Cassel <niklas.cassel@wdc.com> Reviewed-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Damien Le Moal <damien.lemoal@wdc.com> Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com> Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com> Signed-off-by: Keith Busch <kbusch@kernel.org> Signed-off-by: Jens Axboe <axboe@kernel.dk>
2020-10-13Merge tag 'drivers-5.10-2020-10-12' of git://git.kernel.dk/linux-blockLinus Torvalds1-3/+3
Pull block driver updates from Jens Axboe: "Here are the driver updates for 5.10. A few SCSI updates in here too, in coordination with Martin as they depend on core block changes for the shared tag bitmap. This contains: - NVMe pull requests via Christoph: - fix keep alive timer modification (Amit Engel) - order the PCI ID list more sensibly (Andy Shevchenko) - cleanup the open by controller helper (Chaitanya Kulkarni) - use an xarray for the CSE log lookup (Chaitanya Kulkarni) - support ZNS in nvmet passthrough mode (Chaitanya Kulkarni) - fix nvme_ns_report_zones (Christoph Hellwig) - add a sanity check to nvmet-fc (James Smart) - fix interrupt allocation when too many polled queues are specified (Jeffle Xu) - small nvmet-tcp optimization (Mark Wunderlich) - fix a controller refcount leak on init failure (Chaitanya Kulkarni) - misc cleanups (Chaitanya Kulkarni) - major refactoring of the scanning code (Christoph Hellwig) - MD updates via Song: - Bug fixes in bitmap code, from Zhao Heming - Fix a work queue check, from Guoqing Jiang - Fix raid5 oops with reshape, from Song Liu - Clean up unused code, from Jason Yan - Discard improvements, from Xiao Ni - raid5/6 page offset support, from Yufen Yu - Shared tag bitmap for SCSI/hisi_sas/null_blk (John, Kashyap, Hannes) - null_blk open/active zone limit support (Niklas) - Set of bcache updates (Coly, Dongsheng, Qinglang)" * tag 'drivers-5.10-2020-10-12' of git://git.kernel.dk/linux-block: (78 commits) md/raid5: fix oops during stripe resizing md/bitmap: fix memory leak of temporary bitmap md: fix the checking of wrong work queue md/bitmap: md_bitmap_get_counter returns wrong blocks md/bitmap: md_bitmap_read_sb uses wrong bitmap blocks md/raid0: remove unused function is_io_in_chunk_boundary() nvme-core: remove extra condition for vwc nvme-core: remove extra variable nvme: remove nvme_identify_ns_list nvme: refactor nvme_validate_ns nvme: move nvme_validate_ns nvme: query namespace identifiers before adding the namespace nvme: revalidate zone bitmaps in nvme_update_ns_info nvme: remove nvme_update_formats nvme: update the known admin effects nvme: set the queue limits in nvme_update_ns_info nvme: remove the 0 lba_shift check in nvme_update_ns_info nvme: clean up the check for too large logic block sizes nvme: freeze the queue over ->lba_shift updates nvme: factor out a nvme_configure_metadata helper ...
2020-10-13Merge tag 'block-5.10-2020-10-12' of git://git.kernel.dk/linux-blockLinus Torvalds35-1405/+2360
Pull block updates from Jens Axboe: - Series of merge handling cleanups (Baolin, Christoph) - Series of blk-throttle fixes and cleanups (Baolin) - Series cleaning up BDI, seperating the block device from the backing_dev_info (Christoph) - Removal of bdget() as a generic API (Christoph) - Removal of blkdev_get() as a generic API (Christoph) - Cleanup of is-partition checks (Christoph) - Series reworking disk revalidation (Christoph) - Series cleaning up bio flags (Christoph) - bio crypt fixes (Eric) - IO stats inflight tweak (Gabriel) - blk-mq tags fixes (Hannes) - Buffer invalidation fixes (Jan) - Allow soft limits for zone append (Johannes) - Shared tag set improvements (John, Kashyap) - Allow IOPRIO_CLASS_RT for CAP_SYS_NICE (Khazhismel) - DM no-wait support (Mike, Konstantin) - Request allocation improvements (Ming) - Allow md/dm/bcache to use IO stat helpers (Song) - Series improving blk-iocost (Tejun) - Various cleanups (Geert, Damien, Danny, Julia, Tetsuo, Tian, Wang, Xianting, Yang, Yufen, yangerkun) * tag 'block-5.10-2020-10-12' of git://git.kernel.dk/linux-block: (191 commits) block: fix uapi blkzoned.h comments blk-mq: move cancel of hctx->run_work to the front of blk_exit_queue blk-mq: get rid of the dead flush handle code path block: get rid of unnecessary local variable block: fix comment and add lockdep assert blk-mq: use helper function to test hw stopped block: use helper function to test queue register block: remove redundant mq check block: invoke blk_mq_exit_sched no matter whether have .exit_sched percpu_ref: don't refer to ref->data if it isn't allocated block: ratelimit handle_bad_sector() message blk-throttle: Re-use the throtl_set_slice_end() blk-throttle: Open code __throtl_de/enqueue_tg() blk-throttle: Move service tree validation out of the throtl_rb_first() blk-throttle: Move the list operation after list validation blk-throttle: Fix IO hang for a corner case blk-throttle: Avoid tracking latency if low limit is invalid blk-throttle: Avoid getting the current time if tg->last_finish_time is 0 blk-throttle: Remove a meaningless parameter for throtl_downgrade_state() block: Remove redundant 'return' statement ...
2020-10-12Merge branch 'work.iov_iter' of ↵Linus Torvalds1-10/+2
git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs Pull compat iovec cleanups from Al Viro: "Christoph's series around import_iovec() and compat variant thereof" * 'work.iov_iter' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs: security/keys: remove compat_keyctl_instantiate_key_iov mm: remove compat_process_vm_{readv,writev} fs: remove compat_sys_vmsplice fs: remove the compat readv/writev syscalls fs: remove various compat readv/writev helpers iov_iter: transparently handle compat iovecs in import_iovec iov_iter: refactor rw_copy_check_uvector and import_iovec iov_iter: move rw_copy_check_uvector() into lib/iov_iter.c compat.h: fix a spelling error in <linux/compat.h>
2020-10-09blk-mq: move cancel of hctx->run_work to the front of blk_exit_queueYang Yang2-3/+8
blk_exit_queue will free elevator_data, while blk_mq_run_work_fn will access it. Move cancel of hctx->run_work to the front of blk_exit_queue to avoid use-after-free. Fixes: 1b97871b501f ("blk-mq: move cancel of hctx->run_work into blk_mq_hw_sysfs_release") Signed-off-by: Yang Yang <yang.yang@vivo.com> Reviewed-by: Ming Lei <ming.lei@redhat.com> Signed-off-by: Jens Axboe <axboe@kernel.dk>
2020-10-09blk-mq: get rid of the dead flush handle code pathYufen Yu1-6/+0
After commit 923218f6166a ("blk-mq: don't allocate driver tag upfront for flush rq"), blk_mq_submit_bio() will call blk_insert_flush() directly to handle flush request rather than blk_mq_sched_insert_request() in the case of elevator. Then, all flush request either have set RQF_FLUSH_SEQ flag when call blk_mq_sched_insert_request(), or have inserted into hctx->dispatch. So, remove the dead code path. Signed-off-by: Yufen Yu <yuyufen@huawei.com> Signed-off-by: Jens Axboe <axboe@kernel.dk>
2020-10-09block: get rid of unnecessary local variableYufen Yu1-3/+1
Since whole elevator register is protectd by sysfs_lock, we don't need extras 'has_elevator'. Just use q->elevator directly. Signed-off-by: Yufen Yu <yuyufen@huawei.com> Signed-off-by: Jens Axboe <axboe@kernel.dk>
2020-10-09block: fix comment and add lockdep assertYufen Yu1-10/+4
After commit b89f625e28d4 ("block: don't release queue's sysfs lock during switching elevator"), whole elevator register and unregister function are covered by sysfs_lock. So, remove wrong comment and add lockdep assert. Signed-off-by: Yufen Yu <yuyufen@huawei.com> Signed-off-by: Jens Axboe <axboe@kernel.dk>
2020-10-09blk-mq: use helper function to test hw stoppedYufen Yu1-1/+1
We have introduced helper function blk_mq_hctx_stopped() to test BLK_MQ_S_STOPPED. Signed-off-by: Yufen Yu <yuyufen@huawei.com> Signed-off-by: Jens Axboe <axboe@kernel.dk>
2020-10-09block: use helper function to test queue registerYufen Yu2-2/+2
We have defined common interface blk_queue_registered() to test QUEUE_FLAG_REGISTERED. Just use it. Signed-off-by: Yufen Yu <yuyufen@huawei.com> Signed-off-by: Jens Axboe <axboe@kernel.dk>
2020-10-09block: remove redundant mq checkYufen Yu1-2/+2
elv_support_iosched() will check queue_is_mq() for us. So, remove the redundant check to clean code. Signed-off-by: Yufen Yu <yuyufen@huawei.com> Signed-off-by: Jens Axboe <axboe@kernel.dk>
2020-10-09block: invoke blk_mq_exit_sched no matter whether have .exit_schedYufen Yu2-3/+1
We will register debugfs for scheduler no matter whether it have defined callback funciton .exit_sched. So, blk_mq_exit_sched() is always needed to unregister debugfs. Also, q->elevator should be set as NULL after exiting scheduler. For now, since all register scheduler have defined .exit_sched, it will not cause any actual problem. But It will be more reasonable to do this change. Signed-off-by: Yufen Yu <yuyufen@huawei.com> Signed-off-by: Jens Axboe <axboe@kernel.dk>
2020-10-08Merge tag 'block5.9-2020-10-08' of git://git.kernel.dk/linux-blockLinus Torvalds2-4/+4
Pull block fixes from Jens Axboe: "A few fixes that should go into this release: - NVMe controller error path reference fix (Chaitanya) - Fix regression with IBM partitions on non-dasd devices (Christoph) - Fix a missing clear in the compat CDROM packet structure (Peilin)" * tag 'block5.9-2020-10-08' of git://git.kernel.dk/linux-block: partitions/ibm: fix non-DASD devices nvme-core: put ctrl ref when module ref get fail block/scsi-ioctl: Fix kernel-infoleak in scsi_put_cdrom_generic_arg()
2020-10-08block: ratelimit handle_bad_sector() messageTetsuo Handa1-5/+4
syzbot is reporting unkillable task [1], for the caller is failing to handle a corrupted filesystem image which attempts to access beyond the end of the device. While we need to fix the caller, flooding the console with handle_bad_sector() message is unlikely useful. [1] https://syzkaller.appspot.com/bug?id=f1f49fb971d7a3e01bd8ab8cff2ff4572ccf3092 Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp> Reviewed-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Jens Axboe <axboe@kernel.dk>
2020-10-08blk-throttle: Re-use the throtl_set_slice_end()Baolin Wang1-1/+1
Re-use throtl_set_slice_end() to remove duplicate code. Signed-off-by: Baolin Wang <baolin.wang@linux.alibaba.com> Signed-off-by: Jens Axboe <axboe@kernel.dk>
2020-10-08blk-throttle: Open code __throtl_de/enqueue_tg()Baolin Wang1-17/+9
The __throtl_de/enqueue_tg() functions are only be called by throtl_de/enqueue_tg(), thus we can just open code them to make code more readable. Signed-off-by: Baolin Wang <baolin.wang@linux.alibaba.com> Signed-off-by: Jens Axboe <axboe@kernel.dk>
2020-10-08blk-throttle: Move service tree validation out of the throtl_rb_first()Baolin Wang1-4/+5
The throtl_schedule_next_dispatch() will validate if the service queue is empty before calling update_min_dispatch_time(), and the update_min_dispatch_time() will call throtl_rb_first(), which will validate service queue again. Thus we can move the service queue validation out of the throtl_rb_first() to remove the redundant validation in the fast path. Signed-off-by: Baolin Wang <baolin.wang@linux.alibaba.com> Signed-off-by: Jens Axboe <axboe@kernel.dk>
2020-10-08blk-throttle: Move the list operation after list validationBaolin Wang1-2/+4
We should move the list operation after validation. Signed-off-by: Baolin Wang <baolin.wang@linux.alibaba.com> Signed-off-by: Jens Axboe <axboe@kernel.dk>
2020-10-08blk-throttle: Fix IO hang for a corner caseBaolin Wang1-4/+4
It can not scale up in throtl_adjusted_limit() if we set bps or iops is 1, which will cause IO hang when enable low limit. Thus we should treat 1 as a illegal value to avoid this issue. Signed-off-by: Baolin Wang <baolin.wang@linux.alibaba.com> Signed-off-by: Jens Axboe <axboe@kernel.dk>
2020-10-08blk-throttle: Avoid tracking latency if low limit is invalidBaolin Wang1-1/+3
The IO latency tracking is only for LOW limit, so we should add a validation to avoid redundant latency tracking if the LOW limit is not valid. Signed-off-by: Baolin Wang <baolin.wang@linux.alibaba.com> Signed-off-by: Jens Axboe <axboe@kernel.dk>
2020-10-08blk-throttle: Avoid getting the current time if tg->last_finish_time is 0Baolin Wang1-2/+6
We only update the tg->last_finish_time when the low limitaion is enabled, so we can move the tg->last_finish_time validation a little forward to avoid getting the unnecessary current time stamp if the the low limitation is not enabled. Signed-off-by: Baolin Wang <baolin.wang@linux.alibaba.com> Signed-off-by: Jens Axboe <axboe@kernel.dk>
2020-10-08blk-throttle: Remove a meaningless parameter for throtl_downgrade_state()Baolin Wang1-3/+3
The throtl_downgrade_state() is always used to change to LIMIT_LOW limitation, thus remove the latter meaningless parameter which indicates the limitation index. Signed-off-by: Baolin Wang <baolin.wang@linux.alibaba.com> Signed-off-by: Jens Axboe <axboe@kernel.dk>
2020-10-08block: Remove redundant 'return' statementBaolin Wang2-2/+2
Remove redundant 'return' statement for 'void' functions. Signed-off-by: Baolin Wang <baolin.wang@linux.alibaba.com> Signed-off-by: Jens Axboe <axboe@kernel.dk>
2020-10-07dm: fix request-based DM to not bounce through indirect dm_submit_bioMike Snitzer1-1/+0
It is unnecessary to force request-based DM to call into bio-based dm_submit_bio (via indirect disk->fops->submit_bio) only to have it then call blk_mq_submit_bio(). Fix this by establishing a request-based DM block_device_operations (dm_rq_blk_dops, which doesn't have .submit_bio) and update dm_setup_md_queue() to set md->disk->fops to it for DM_TYPE_REQUEST_BASED. Remove DM_TYPE_REQUEST_BASED conditional in dm_submit_bio and unexport blk_mq_submit_bio. Fixes: c62b37d96b6eb ("block: move ->make_request_fn to struct block_device_operations") Signed-off-by: Mike Snitzer <snitzer@redhat.com>
2020-10-07partitions/ibm: fix non-DASD devicesChristoph Hellwig1-4/+3
Don't error out if the dasd_biodasdinfo symbol is not available. Cc: stable@vger.kernel.org Fixes: 26d7e28e3820 ("s390/dasd: remove ioctl_by_bdev calls") Reported-by: Christian Borntraeger <borntraeger@de.ibm.com> Signed-off-by: Christoph Hellwig <hch@lst.de> Tested-by: Christian Borntraeger <borntraeger@de.ibm.com> Reviewed-by: Stefan Haberland <sth@linux.ibm.com> Signed-off-by: Jens Axboe <axboe@kernel.dk>
2020-10-06block: Consider only dispatched requests for inflight statisticGabriel Krisman Bertazi1-1/+1
According to Documentation/block/stat.rst, inflight should not include I/O requests that are in the queue but not yet dispatched to the device, but blk-mq identifies as inflight any request that has a tag allocated, which, for queues without elevator, happens at request allocation time and before it is queued in the ctx (default case in blk_mq_submit_bio). In addition, current behavior is different for queues with elevator from queues without it, since for the former the driver tag is allocated at dispatch time. A more precise approach would be to only consider requests with state MQ_RQ_IN_FLIGHT. This effectively reverts commit 6131837b1de6 ("blk-mq: count allocated but not started requests in iostats inflight") to consolidate blk-mq behavior with itself (elevator case) and with original documentation, but it differs from the behavior used by the legacy path. This version differs from v1 by using blk_mq_rq_state to access the state attribute. Avoid using blk_mq_request_started, which was suggested, since we don't want to include MQ_RQ_COMPLETE. Signed-off-by: Gabriel Krisman Bertazi <krisman@collabora.com> Cc: Omar Sandoval <osandov@fb.com> Signed-off-by: Jens Axboe <axboe@kernel.dk>
2020-10-06block: move blk_mq_sched_try_merge to blk-merge.cChristoph Hellwig3-63/+50
Move blk_mq_sched_try_merge to blk-merge.c, which allows to mark a lot of the merge infrastructure static there. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Jens Axboe <axboe@kernel.dk>
2020-10-06block: remove the unused blk_integrity_merge_bio exportChristoph Hellwig2-1/+7
Also move the definition from the public blkdev.h to the private block/blk.h header. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Jens Axboe <axboe@kernel.dk>
2020-10-06block: remove the unused blk_integrity_merge_rq exportChristoph Hellwig2-1/+8
Also move the definition from the public blkdev.h to the private block/blk.h header. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Jens Axboe <axboe@kernel.dk>
2020-10-05block: warn if !__GFP_DIRECT_RECLAIM in bio_crypt_set_ctx()Eric Biggers1-1/+9
bio_crypt_set_ctx() assumes its gfp_mask argument always includes __GFP_DIRECT_RECLAIM, so that the mempool_alloc() will always succeed. For now this assumption is still fine, since no callers violate it. Making bio_crypt_set_ctx() able to fail would add unneeded complexity. However, if a caller didn't use __GFP_DIRECT_RECLAIM, it would be very hard to notice the bug. Make it easier by adding a WARN_ON_ONCE(). Signed-off-by: Eric Biggers <ebiggers@google.com> Reviewed-by: Satya Tangirala <satyat@google.com> Cc: Miaohe Lin <linmiaohe@huawei.com> Cc: Satya Tangirala <satyat@google.com> Signed-off-by: Jens Axboe <axboe@kernel.dk>
2020-10-05block: make blk_crypto_rq_bio_prep() able to failEric Biggers4-20/+34
blk_crypto_rq_bio_prep() assumes its gfp_mask argument always includes __GFP_DIRECT_RECLAIM, so that the mempool_alloc() will always succeed. However, blk_crypto_rq_bio_prep() might be called with GFP_ATOMIC via setup_clone() in drivers/md/dm-rq.c. This case isn't currently reachable with a bio that actually has an encryption context. However, it's fragile to rely on this. Just make blk_crypto_rq_bio_prep() able to fail. Suggested-by: Satya Tangirala <satyat@google.com> Signed-off-by: Eric Biggers <ebiggers@google.com> Reviewed-by: Mike Snitzer <snitzer@redhat.com> Reviewed-by: Satya Tangirala <satyat@google.com> Cc: Miaohe Lin <linmiaohe@huawei.com> Signed-off-by: Jens Axboe <axboe@kernel.dk>
2020-10-05block: make bio_crypt_clone() able to failEric Biggers3-22/+22
bio_crypt_clone() assumes its gfp_mask argument always includes __GFP_DIRECT_RECLAIM, so that the mempool_alloc() will always succeed. However, bio_crypt_clone() might be called with GFP_ATOMIC via setup_clone() in drivers/md/dm-rq.c, or with GFP_NOWAIT via kcryptd_io_read() in drivers/md/dm-crypt.c. Neither case is currently reachable with a bio that actually has an encryption context. However, it's fragile to rely on this. Just make bio_crypt_clone() able to fail, analogous to bio_integrity_clone(). Reported-by: Miaohe Lin <linmiaohe@huawei.com> Signed-off-by: Eric Biggers <ebiggers@google.com> Reviewed-by: Mike Snitzer <snitzer@redhat.com> Reviewed-by: Satya Tangirala <satyat@google.com> Cc: Satya Tangirala <satyat@google.com> Signed-off-by: Jens Axboe <axboe@kernel.dk>
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