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* block: do not reverse request order when flushing plug listJan Kara2023-03-141-0/+6
| | | | | | | | | | | | | | | | | | | | | | | | | Commit 26fed4ac4eab ("block: flush plug based on hardware and software queue order") changed flushing of plug list to submit requests one device at a time. However while doing that it also started using list_add_tail() instead of list_add() used previously thus effectively submitting requests in reverse order. Also when forming a rq_list with remaining requests (in case two or more devices are used), we effectively reverse the ordering of the plug list for each device we process. Submitting requests in reverse order has negative impact on performance for rotational disks (when BFQ is not in use). We observe 10-25% regression in random 4k write throughput, as well as ~20% regression in MariaDB OLTP benchmark on rotational storage on btrfs filesystem. Fix the problem by preserving ordering of the plug list when inserting requests into the queuelist as well as by appending to requeue_list instead of prepending to it. Fixes: 26fed4ac4eab ("block: flush plug based on hardware and software queue order") Signed-off-by: Jan Kara <jack@suse.cz> Reviewed-by: Christoph Hellwig <hch@lst.de> Link: https://lore.kernel.org/r/20230313093002.11756-1-jack@suse.cz Signed-off-by: Jens Axboe <axboe@kernel.dk>
* blk-mq: Reorder fields in 'struct blk_mq_tag_set'Christophe JAILLET2023-02-171-2/+2
| | | | | | | | | | Group some variables based on their sizes to reduce hole and avoid padding. On x86_64, this shrinks the size of 'struct blk_mq_tag_set' from 304 to 296 bytes. Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr> Link: https://lore.kernel.org/r/6f249f9b02a3490283ef0278096556de41aa0cf0.1676626130.git.christophe.jaillet@wanadoo.fr Signed-off-by: Jens Axboe <axboe@kernel.dk>
* Merge tag 'for-6.2/block-2022-12-08' of git://git.kernel.dk/linuxLinus Torvalds2022-12-131-2/+7
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Pull block updates from Jens Axboe: - NVMe pull requests via Christoph: - Support some passthrough commands without CAP_SYS_ADMIN (Kanchan Joshi) - Refactor PCIe probing and reset (Christoph Hellwig) - Various fabrics authentication fixes and improvements (Sagi Grimberg) - Avoid fallback to sequential scan due to transient issues (Uday Shankar) - Implement support for the DEAC bit in Write Zeroes (Christoph Hellwig) - Allow overriding the IEEE OUI and firmware revision in configfs for nvmet (Aleksandr Miloserdov) - Force reconnect when number of queue changes in nvmet (Daniel Wagner) - Minor fixes and improvements (Uros Bizjak, Joel Granados, Sagi Grimberg, Christoph Hellwig, Christophe JAILLET) - Fix and cleanup nvme-fc req allocation (Chaitanya Kulkarni) - Use the common tagset helpers in nvme-pci driver (Christoph Hellwig) - Cleanup the nvme-pci removal path (Christoph Hellwig) - Use kstrtobool() instead of strtobool (Christophe JAILLET) - Allow unprivileged passthrough of Identify Controller (Joel Granados) - Support io stats on the mpath device (Sagi Grimberg) - Minor nvmet cleanup (Sagi Grimberg) - MD pull requests via Song: - Code cleanups (Christoph) - Various fixes - Floppy pull request from Denis: - Fix a memory leak in the init error path (Yuan) - Series fixing some batch wakeup issues with sbitmap (Gabriel) - Removal of the pktcdvd driver that was deprecated more than 5 years ago, and subsequent removal of the devnode callback in struct block_device_operations as no users are now left (Greg) - Fix for partition read on an exclusively opened bdev (Jan) - Series of elevator API cleanups (Jinlong, Christoph) - Series of fixes and cleanups for blk-iocost (Kemeng) - Series of fixes and cleanups for blk-throttle (Kemeng) - Series adding concurrent support for sync queues in BFQ (Yu) - Series bringing drbd a bit closer to the out-of-tree maintained version (Christian, Joel, Lars, Philipp) - Misc drbd fixes (Wang) - blk-wbt fixes and tweaks for enable/disable (Yu) - Fixes for mq-deadline for zoned devices (Damien) - Add support for read-only and offline zones for null_blk (Shin'ichiro) - Series fixing the delayed holder tracking, as used by DM (Yu, Christoph) - Series enabling bio alloc caching for IRQ based IO (Pavel) - Series enabling userspace peer-to-peer DMA (Logan) - BFQ waker fixes (Khazhismel) - Series fixing elevator refcount issues (Christoph, Jinlong) - Series cleaning up references around queue destruction (Christoph) - Series doing quiesce by tagset, enabling cleanups in drivers (Christoph, Chao) - Series untangling the queue kobject and queue references (Christoph) - Misc fixes and cleanups (Bart, David, Dawei, Jinlong, Kemeng, Ye, Yang, Waiman, Shin'ichiro, Randy, Pankaj, Christoph) * tag 'for-6.2/block-2022-12-08' of git://git.kernel.dk/linux: (247 commits) blktrace: Fix output non-blktrace event when blk_classic option enabled block: sed-opal: Don't include <linux/kernel.h> sed-opal: allow using IOC_OPAL_SAVE for locking too blk-cgroup: Fix typo in comment block: remove bio_set_op_attrs nvmet: don't open-code NVME_NS_ATTR_RO enumeration nvme-pci: use the tagset alloc/free helpers nvme: add the Apple shared tag workaround to nvme_alloc_io_tag_set nvme: only set reserved_tags in nvme_alloc_io_tag_set for fabrics controllers nvme: consolidate setting the tagset flags nvme: pass nr_maps explicitly to nvme_alloc_io_tag_set block: bio_copy_data_iter nvme-pci: split out a nvme_pci_ctrl_is_dead helper nvme-pci: return early on ctrl state mismatch in nvme_reset_work nvme-pci: rename nvme_disable_io_queues nvme-pci: cleanup nvme_suspend_queue nvme-pci: remove nvme_pci_disable nvme-pci: remove nvme_disable_admin_queue nvme: merge nvme_shutdown_ctrl into nvme_disable_ctrl nvme: use nvme_wait_ready in nvme_shutdown_ctrl ...
| * blk-mq: add tagset quiesce interfaceChao Leng2022-11-021-0/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Drivers that have shared tagsets may need to quiesce potentially a lot of request queues that all share a single tagset (e.g. nvme). Add an interface to quiesce all the queues on a given tagset. This interface is useful because it can speedup the quiesce by doing it in parallel. Because some queues should not need to be quiesced (e.g. the nvme connect_q) when quiescing the tagset, introduce a QUEUE_FLAG_SKIP_TAGSET_QUIESCE flag to allow this new interface to ski quiescing a particular queue. Signed-off-by: Chao Leng <lengchao@huawei.com> [hch: simplify for the per-tag_set srcu_struct] Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Keith Busch <kbusch@kernel.org> Reviewed-by: Sagi Grimberg <sagi@grimberg.me> Reviewed-by: Ming Lei <ming.lei@redhat.com> Reviewed-by: Chao Leng <lengchao@huawei.com> Reviewed-by: Hannes Reinecke <hare@suse.de> Reviewed-by: Chaitanya Kulkarni <kch@nvidia.com> Link: https://lore.kernel.org/r/20221101150050.3510-14-hch@lst.de Signed-off-by: Jens Axboe <axboe@kernel.dk>
| * blk-mq: pass a tagset to blk_mq_wait_quiesce_doneChristoph Hellwig2022-11-021-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Nothing in blk_mq_wait_quiesce_done needs the request_queue now, so just pass the tagset, and move the non-mq check into the only caller that needs it. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Keith Busch <kbusch@kernel.org> Reviewed-by: Sagi Grimberg <sagi@grimberg.me> Reviewed-by: Chao Leng <lengchao@huawei.com> Reviewed-by: Hannes Reinecke <hare@suse.de> Reviewed-by: Chaitanya Kulkarni <kch@nvidia.com> Link: https://lore.kernel.org/r/20221101150050.3510-13-hch@lst.de Signed-off-by: Jens Axboe <axboe@kernel.dk>
| * blk-mq: move the srcu_struct used for quiescing to the tagsetChristoph Hellwig2022-11-021-0/+4
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | All I/O submissions have fairly similar latencies, and a tagset-wide quiesce is a fairly common operation. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Keith Busch <kbusch@kernel.org> Reviewed-by: Ming Lei <ming.lei@redhat.com> Reviewed-by: Chao Leng <lengchao@huawei.com> Reviewed-by: Sagi Grimberg <sagi@grimberg.me> Reviewed-by: Hannes Reinecke <hare@suse.de> Reviewed-by: Chaitanya Kulkarni <kch@nvidia.com> Link: https://lore.kernel.org/r/20221101150050.3510-12-hch@lst.de [axboe: fix whitespace] Signed-off-by: Jens Axboe <axboe@kernel.dk>
| * block: Remove request.write_hintBart Van Assche2022-10-251-1/+0
| | | | | | | | | | | | | | | | | | | | | | | | | | Commit c75e707fe1aa ("block: remove the per-bio/request write hint") removed all code that uses the struct request write_hint member. Hence also remove 'write_hint' itself. Reviewed-by: Ming Lei <ming.lei@redhat.com> Cc: Christoph Hellwig <hch@lst.de> Signed-off-by: Bart Van Assche <bvanassche@acm.org> Link: https://lore.kernel.org/r/20221025191755.1711437-2-bvanassche@acm.org Reviewed-by: Keith Busch <kbusch@kernel.org> Signed-off-by: Jens Axboe <axboe@kernel.dk>
* | blk-mq: don't add non-pt request with ->end_io to batchMing Lei2022-10-271-1/+2
|/ | | | | | | | | | | | | | | | | | | | | | | | | dm-rq implements ->end_io callback for request issued to underlying queue, and it isn't passthrough request. Commit ab3e1d3bbab9 ("block: allow end_io based requests in the completion batch handling") doesn't clear rq->bio and rq->__data_len for request with ->end_io in blk_mq_end_request_batch(), and this way is actually dangerous, but so far it is only for nvme passthrough request. dm-rq needs to clean up remained bios in case of partial completion, and req->bio is required, then use-after-free is triggered, so the underlying clone request can't be completed in blk_mq_end_request_batch. Fix panic by not adding such request into batch list, and the issue can be triggered simply by exposing nvme pci to dm-mpath simply. Fixes: ab3e1d3bbab9 ("block: allow end_io based requests in the completion batch handling") Cc: dm-devel@redhat.com Cc: Mike Snitzer <snitzer@kernel.org> Reported-by: Changhui Zhong <czhong@redhat.com> Signed-off-by: Ming Lei <ming.lei@redhat.com> Link: https://lore.kernel.org/r/20221027085709.513175-1-ming.lei@redhat.com Signed-off-by: Jens Axboe <axboe@kernel.dk>
* block: add blk_rq_map_user_ioAnuj Gupta2022-09-301-0/+2
| | | | | | | | | | | | Create a helper blk_rq_map_user_io for mapping of vectored as well as non-vectored requests. This will help in saving dupilcation of code at few places in scsi and nvme. Signed-off-by: Anuj Gupta <anuj20.g@samsung.com> Suggested-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Christoph Hellwig <hch@lst.de> Link: https://lore.kernel.org/r/20220930062749.152261-4-anuj20.g@samsung.com Signed-off-by: Jens Axboe <axboe@kernel.dk>
* block: allow end_io based requests in the completion batch handlingJens Axboe2022-09-301-1/+2
| | | | | | | | | | | With end_io handlers now being able to potentially pass ownership of the request upon completion, we can allow requests with end_io handlers in the batch completion handling. Reviewed-by: Anuj Gupta <anuj20.g@samsung.com> Reviewed-by: Keith Busch <kbusch@kernel.org> Co-developed-by: Stefan Roesch <shr@fb.com> Signed-off-by: Jens Axboe <axboe@kernel.dk>
* block: change request end_io handler to pass back a return valueJens Axboe2022-09-301-1/+6
| | | | | | | | | | | Everything is just converted to returning RQ_END_IO_NONE, and there should be no functional changes with this patch. In preparation for allowing the end_io handler to pass ownership back to the block layer, rather than retain ownership of the request. Reviewed-by: Keith Busch <kbusch@kernel.org> Signed-off-by: Jens Axboe <axboe@kernel.dk>
* Merge branch 'for-6.1/io_uring' into for-6.1/passthroughJens Axboe2022-09-301-0/+1
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * for-6.1/io_uring: (56 commits) io_uring/net: fix notif cqe reordering io_uring/net: don't update msg_name if not provided io_uring: don't gate task_work run on TIF_NOTIFY_SIGNAL io_uring/rw: defer fsnotify calls to task context io_uring/net: fix fast_iov assignment in io_setup_async_msg() io_uring/net: fix non-zc send with address io_uring/net: don't skip notifs for failed requests io_uring/rw: don't lose short results on io_setup_async_rw() io_uring/rw: fix unexpected link breakage io_uring/net: fix cleanup double free free_iov init io_uring: fix CQE reordering io_uring/net: fix UAF in io_sendrecv_fail() selftest/net: adjust io_uring sendzc notif handling io_uring: ensure local task_work marks task as running io_uring/net: zerocopy sendmsg io_uring/net: combine fail handlers io_uring/net: rename io_sendzc() io_uring/net: support non-zerocopy sendto io_uring/net: refactor io_setup_async_addr io_uring/net: don't lose partial send_zc on fail ...
| * block: export blk_rq_is_pollKanchan Joshi2022-09-211-0/+1
| | | | | | | | | | | | | | | | This is in preparation to support iopoll for nvme passthrough. Signed-off-by: Kanchan Joshi <joshi.k@samsung.com> Link: https://lore.kernel.org/r/20220823161443.49436-4-joshi.k@samsung.com Signed-off-by: Jens Axboe <axboe@kernel.dk>
* | block: Fix the enum blk_eh_timer_return documentationBart Van Assche2022-09-211-2/+9
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The documentation of the blk_eh_timer_return enumeration values does not reflect correctly how e.g. the SCSI core uses these values. Fix the documentation. Cc: Christoph Hellwig <hch@lst.de> Cc: Ming Lei <ming.lei@redhat.com> Cc: Hannes Reinecke <hare@suse.de> Cc: Damien Le Moal <damien.lemoal@wdc.com> Cc: Johannes Thumshirn <johannes.thumshirn@wdc.com> Fixes: 88b0cfad2888 ("block: document the blk_eh_timer_return values") Signed-off-by: Bart Van Assche <bvanassche@acm.org> Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com> Reviewed-by: Damien Le Moal <damien.lemoal@opensource.wdc.com> Link: https://lore.kernel.org/r/20220920200626.3422296-1-bvanassche@acm.org Signed-off-by: Jens Axboe <axboe@kernel.dk>
* | block: shrink rq_map_data a bitJens Axboe2022-08-221-4/+4
| | | | | | | | | | | | | | | | | | | | | | We don't need full ints for several of these members. Change the page_order and nr_entries to unsigned shorts, and the true/false from_user and null_mapped to booleans. This shrinks the struct from 32 to 24 bytes on 64-bit archs. Reviewed-by: Chaitanya Kulkarni <kch@nvidia.com> Signed-off-by: Jens Axboe <axboe@kernel.dk>
* | block: Change the return type of blk_mq_map_queues() into voidBart Van Assche2022-08-221-2/+2
|/ | | | | | | | | | | | | | | | | | | | Since blk_mq_map_queues() and the .map_queues() callbacks always return 0, change their return type into void. Most callers ignore the returned value anyway. Cc: Christoph Hellwig <hch@lst.de> Cc: Jason Wang <jasowang@redhat.com> Cc: Keith Busch <kbusch@kernel.org> Cc: Martin K. Petersen <martin.petersen@oracle.com> Cc: Doug Gilbert <dgilbert@interlog.com> Cc: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Bart Van Assche <bvanassche@acm.org> Reviewed-by: John Garry <john.garry@huawei.com> Acked-by: Md Haris Iqbal <haris.iqbal@ionos.com> Reviewed-by: Sagi Grimberg <sagi@grimberg.me> Link: https://lore.kernel.org/r/20220815170043.19489-3-bvanassche@acm.org [axboe: fold in fix from Bart] Signed-off-by: Jens Axboe <axboe@kernel.dk>
* blk-mq: remove unused function blk_mq_queue_stopped()Yu Kuai2022-08-181-1/+0
| | | | | | | | | blk_mq_queue_stopped() doesn't have any caller, which was found by code coverage test, thus remove it. Signed-off-by: Yu Kuai <yukuai3@huawei.com> Link: https://lore.kernel.org/r/20220818063555.3741222-1-yukuai1@huaweicloud.com Signed-off-by: Jens Axboe <axboe@kernel.dk>
* block: Use the new blk_opf_t typeBart Van Assche2022-07-141-3/+3
| | | | | | | | | | | | | | | | | | Use the new blk_opf_t type for arguments and variables that represent request flags or a bitwise combination of a request operation and request flags. Rename the function arguments and also a structure member that hold a request operation and flags from 'rw' into 'opf'. This patch does not change any functionality. Cc: Christoph Hellwig <hch@lst.de> Cc: Ming Lei <ming.lei@redhat.com> Cc: Hannes Reinecke <hare@suse.de> Cc: Damien Le Moal <damien.lemoal@wdc.com> Cc: Johannes Thumshirn <johannes.thumshirn@wdc.com> Signed-off-by: Bart Van Assche <bvanassche@acm.org> Link: https://lore.kernel.org/r/20220714180729.1065367-7-bvanassche@acm.org Signed-off-by: Jens Axboe <axboe@kernel.dk>
* block: Change the type of req_op() and bio_op() into enum req_opBart Van Assche2022-07-141-2/+4
| | | | | | | | | | | | | | | | | | | | Improve static type checking by changing the type of the value returned by req_op() and bio_op() from unsigned int into enum req_op. Insert 'default: break;' in switch statements on the enum req_op type to prevent that the compiler warns about these switch statements. Cc: Christoph Hellwig <hch@lst.de> Cc: Ming Lei <ming.lei@redhat.com> Cc: Hannes Reinecke <hare@suse.de> Cc: Damien Le Moal <damien.lemoal@wdc.com> Cc: Johannes Thumshirn <johannes.thumshirn@wdc.com> Cc: Tim Waugh <tim@cyberelk.net> Cc: Alasdair Kergon <agk@redhat.com> Cc: Mike Snitzer <snitzer@kernel.org> Cc: Mikulas Patocka <mpatocka@redhat.com> Signed-off-by: Bart Van Assche <bvanassche@acm.org> Link: https://lore.kernel.org/r/20220714180729.1065367-5-bvanassche@acm.org Signed-off-by: Jens Axboe <axboe@kernel.dk>
* block: move zone related fields to struct gendiskChristoph Hellwig2022-07-061-4/+4
| | | | | | | | | | | | | | Move the zone related fields that are currently stored in struct request_queue to struct gendisk as these are part of the highlevel block layer API and are only used for non-passthrough I/O that requires the gendisk. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Chaitanya Kulkarni <kch@nvidia.com> Reviewed-by: Damien Le Moal <damien.lemoal@opensource.wdc.com> Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com> Link: https://lore.kernel.org/r/20220706070350.1703384-17-hch@lst.de Signed-off-by: Jens Axboe <axboe@kernel.dk>
* blk-mq: Drop 'reserved' arg of busy_tag_iter_fnJohn Garry2022-07-061-1/+1
| | | | | | | | | | | | | | We no longer use the 'reserved' arg in busy_tag_iter_fn for any iter function so it may be dropped. Signed-off-by: John Garry <john.garry@huawei.com> Reviewed-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Hannes Reinecke <hare@suse.de> Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com> Reviewed-by: Sagi Grimberg <sagi@grimberg.me> #nvme Reviewed-by: Bart Van Assche <bvanassche@acm.org> Link: https://lore.kernel.org/r/1657109034-206040-6-git-send-email-john.garry@huawei.com Signed-off-by: Jens Axboe <axboe@kernel.dk>
* blk-mq: Drop blk_mq_ops.timeout 'reserved' argJohn Garry2022-07-061-1/+1
| | | | | | | | | | | | | | | | | | | With new API blk_mq_is_reserved_rq() we can tell if a request is from the reserved pool, so stop passing 'reserved' arg. There is actually only a single user of that arg for all the callback implementations, which can use blk_mq_is_reserved_rq() instead. This will also allow us to stop passing the same 'reserved' around the blk-mq iter functions next. Signed-off-by: John Garry <john.garry@huawei.com> Reviewed-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Bart Van Assche <bvanassche@acm.org> Reviewed-by: Hannes Reinecke <hare@suse.de> Acked-by: Ulf Hansson <ulf.hansson@linaro.org> # For MMC Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com> Link: https://lore.kernel.org/r/1657109034-206040-4-git-send-email-john.garry@huawei.com Signed-off-by: Jens Axboe <axboe@kernel.dk>
* blk-mq: Add a flag for reserved requestsJohn Garry2022-07-061-0/+6
| | | | | | | | | | | | | Add a flag for reserved requests so that drivers may know this for any special handling. Signed-off-by: John Garry <john.garry@huawei.com> Reviewed-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Bart Van Assche <bvanassche@acm.org> Reviewed-by: Hannes Reinecke <hare@suse.de> Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com> Link: https://lore.kernel.org/r/1657109034-206040-3-git-send-email-john.garry@huawei.com Signed-off-by: Jens Axboe <axboe@kernel.dk>
* blk-mq: cleanup disk sysfs registrationChristoph Hellwig2022-06-281-1/+0
| | | | | | | | | | | Pass a gendisk to the sysfs register/unregister functions and give them descriptive names. Also move the unregistration helper next to the one doing the registration. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Bart Van Assche <bvanassche@acm.org> Link: https://lore.kernel.org/r/20220628171850.1313069-7-hch@lst.de Signed-off-by: Jens Axboe <axboe@kernel.dk>
* block: simplify disk shutdownChristoph Hellwig2022-06-281-0/+3
| | | | | | | | | | | | | | | | | Set the queue dying flag and call blk_mq_exit_queue from del_gendisk for all disks that do not have separately allocated queues, and thus remove the need to call blk_cleanup_queue for them. Rename blk_cleanup_disk to blk_mq_destroy_queue to make it clear that this function is intended only for separately allocated blk-mq queues. This saves an extra queue freeze for devices without a separately allocated queue. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Hannes Reinecke <hare@suse.de> Link: https://lore.kernel.org/r/20220619060552.1850436-6-hch@lst.de Signed-off-by: Jens Axboe <axboe@kernel.dk>
* blk-mq: remove the done argument to blk_execute_rq_nowaitChristoph Hellwig2022-05-281-2/+1
| | | | | | | | | | | | | Let the caller set it together with the end_io_data instead of passing a pointless argument. Note the the target code did in fact already set it and then just overrode it again by calling blk_execute_rq_nowait. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Keith Busch <kbusch@kernel.org> Reviewed-by: Kanchan Joshi <joshi.k@samsung.com> Reviewed-by: Chaitanya Kulkarni <kch@nvidia.com> Link: https://lore.kernel.org/r/20220524121530.943123-4-hch@lst.de Signed-off-by: Jens Axboe <axboe@kernel.dk>
* blk-mq: remove the error_count from struct requestWilly Tarreau2022-05-081-1/+0
| | | | | | | | | | | | | The last two users were floppy.c and ataflop.c respectively, it was verified that no other drivers makes use of this, so let's remove it. Suggested-by: Linus Torvalds <torvalds@linuxfoundation.org> Cc: Minh Yuan <yuanmingbuaa@gmail.com> Cc: Denis Efremov <efremov@linux.com>, Cc: Geert Uytterhoeven <geert@linux-m68k.org> Cc: Christoph Hellwig <hch@lst.de> Signed-off-by: Willy Tarreau <w@1wt.eu> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* blk-mq: manage hctx map via xarrayMing Lei2022-03-081-2/+1
| | | | | | | | | | | | | | | | | | First code becomes more clean by switching to xarray from plain array. Second use-after-free on q->queue_hw_ctx can be fixed because queue_for_each_hw_ctx() may be run when updating nr_hw_queues is in-progress. With this patch, q->hctx_table is defined as xarray, and this structure will share same lifetime with request queue, so queue_for_each_hw_ctx() can use q->hctx_table to lookup hctx reliably. Reported-by: Yu Kuai <yukuai3@huawei.com> Signed-off-by: Ming Lei <ming.lei@redhat.com> Reviewed-by: Hannes Reinecke <hare@suse.de> Reviewed-by: Christoph Hellwig <hch@lst.de> Link: https://lore.kernel.org/r/20220308073219.91173-7-ming.lei@redhat.com [axboe: fix blk_mq_hw_ctx forward declaration] Signed-off-by: Jens Axboe <axboe@kernel.dk>
* blk-mq: remove the request_queue argument to blk_insert_cloned_requestChristoph Hellwig2022-02-161-2/+1
| | | | | | | | | | The request must be submitted to the queue it was allocated for, so remove the extra request_queue argument. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Mike Snitzer <snitzer@redhat.com> Link: https://lore.kernel.org/r/20220215100540.3892965-4-hch@lst.de Signed-off-by: Jens Axboe <axboe@kernel.dk>
* block: fix old-style declarationYang Li2022-01-091-1/+1
| | | | | | | | | | | | | Move the 'inline' keyword to the front of 'void'. Remove a warning found by clang(make W=1 LLVM=1) ./include/linux/blk-mq.h:259:1: warning: ‘inline’ is not at beginning of declaration Reported-by: Abaci Robot <abaci@linux.alibaba.com> Signed-off-by: Yang Li <yang.lee@linux.alibaba.com> Link: https://lore.kernel.org/r/20220107005228.103927-1-yang.lee@linux.alibaba.com Signed-off-by: Jens Axboe <axboe@kernel.dk>
* block: introduce rq_list_moveKeith Busch2022-01-051-0/+17
| | | | | | | | | | | When iterating a list, a particular request may need to be moved for special handling. Provide a helper function to achieve that so drivers don't need to reimplement rqlist manipulation. Signed-off-by: Keith Busch <kbusch@kernel.org> Reviewed-by: Christoph Hellwig <hch@lst.de> Link: https://lore.kernel.org/r/20220105170518.3181469-4-kbusch@kernel.org Signed-off-by: Jens Axboe <axboe@kernel.dk>
* block: introduce rq_list_for_each_safe macroKeith Busch2022-01-051-0/+4
| | | | | | | | | | While iterating a list, a particular request may need to be removed for special handling. Provide an iterator that can safely handle that. Reviewed-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Keith Busch <kbusch@kernel.org> Link: https://lore.kernel.org/r/20220105170518.3181469-3-kbusch@kernel.org Signed-off-by: Jens Axboe <axboe@kernel.dk>
* block: move rq_list macros to blk-mq.hKeith Busch2022-01-051-0/+29
| | | | | | | | | | Move the request list macros to the header file that defines that struct they operate on. Signed-off-by: Keith Busch <kbusch@kernel.org> Reviewed-by: Christoph Hellwig <hch@lst.de> Link: https://lore.kernel.org/r/20220105170518.3181469-2-kbusch@kernel.org Signed-off-by: Jens Axboe <axboe@kernel.dk>
* block: add mq_ops->queue_rqs hookJens Axboe2021-12-161-0/+8
| | | | | | | | | If we have a list of requests in our plug list, send it to the driver in one go, if possible. The driver must set mq_ops->queue_rqs() to support this, if not the usual one-by-one path is used. Reviewed-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Jens Axboe <axboe@kernel.dk>
* blk-mq: Delete busy_iter_fnJohn Garry2021-12-061-1/+0
| | | | | | | | | | | | | | | | | | | Typedefs busy_iter_fn and busy_tag_iter_fn are now identical, so delete busy_iter_fn to reduce duplication. It would be nicer to delete busy_tag_iter_fn, as the name busy_iter_fn is less specific. However busy_tag_iter_fn is used in many different parts of the tree, unlike busy_iter_fn which is just use in block/, so just take the straightforward path now, so that we could rename later treewide. Signed-off-by: John Garry <john.garry@huawei.com> Reviewed-by: Ming Lei <ming.lei@redhat.com> Reviewed-by: Hannes Reinecke <hare@suse.de> Tested-by: Kashyap Desai <kashyap.desai@broadcom.com> Link: https://lore.kernel.org/r/1638794990-137490-3-git-send-email-john.garry@huawei.com Signed-off-by: Jens Axboe <axboe@kernel.dk>
* blk-mq: Drop busy_iter_fn blk_mq_hw_ctx argumentJohn Garry2021-12-061-2/+1
| | | | | | | | | | | | | | | | | | | | The only user of blk_mq_hw_ctx blk_mq_hw_ctx argument is blk_mq_rq_inflight(). Function blk_mq_rq_inflight() uses the hctx to find the associated request queue to match against the request. However this same check is already done in caller bt_iter(), so drop this check. With that change there are no more users of busy_iter_fn blk_mq_hw_ctx argument, so drop the argument. Reviewed-by Hannes Reinecke <hare@suse.de> Signed-off-by: John Garry <john.garry@huawei.com> Reviewed-by: Ming Lei <ming.lei@redhat.com> Tested-by: Kashyap Desai <kashyap.desai@broadcom.com> Link: https://lore.kernel.org/r/1638794990-137490-2-git-send-email-john.garry@huawei.com Signed-off-by: Jens Axboe <axboe@kernel.dk>
* blk-mq: move srcu from blk_mq_hw_ctx to request_queueMing Lei2021-12-031-8/+0
| | | | | | | | | | | | | | | | | | | In case of BLK_MQ_F_BLOCKING, per-hctx srcu is used to protect dispatch critical area. However, this srcu instance stays at the end of hctx, and it often takes standalone cacheline, often cold. Inside srcu_read_lock() and srcu_read_unlock(), WRITE is always done on the indirect percpu variable which is allocated from heap instead of being embedded, srcu->srcu_idx is read only in srcu_read_lock(). It doesn't matter if srcu structure stays in hctx or request queue. So switch to per-request-queue srcu for protecting dispatch, and this way simplifies quiesce a lot, not mention quiesce is always done on the request queue wide. Signed-off-by: Ming Lei <ming.lei@redhat.com> Link: https://lore.kernel.org/r/20211203131534.3668411-3-ming.lei@redhat.com Signed-off-by: Jens Axboe <axboe@kernel.dk>
* block: switch to atomic_t for request referencesJens Axboe2021-12-031-1/+1
| | | | | | | | | | | | refcount_t is not as expensive as it used to be, but it's still more expensive than the io_uring method of using atomic_t and just checking for potential over/underflow. This borrows that same implementation, which in turn is based on the mm implementation from Linus. Reviewed-by: Keith Busch <kbusch@kernel.org> Signed-off-by: Jens Axboe <axboe@kernel.dk>
* block: remove the gendisk argument to blk_execute_rqChristoph Hellwig2021-11-291-4/+3
| | | | | | | | | | | | Remove the gendisk aregument to blk_execute_rq and blk_execute_rq_nowait given that it is unused now. Also convert the boolean at_head parameter to actually use the bool type while touching the prototype. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Chaitanya Kulkarni <kch@nvidia.com> Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com> Link: https://lore.kernel.org/r/20211126121802.2090656-5-hch@lst.de Signed-off-by: Jens Axboe <axboe@kernel.dk>
* block: remove the ->rq_disk field in struct requestChristoph Hellwig2021-11-291-4/+0
| | | | | | | | | | Just use the disk attached to the request_queue instead. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Chaitanya Kulkarni <kch@nvidia.com> Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com> Link: https://lore.kernel.org/r/20211126121802.2090656-4-hch@lst.de Signed-off-by: Jens Axboe <axboe@kernel.dk>
* blk-mq: Add blk_mq_complete_request_direct()Sebastian Andrzej Siewior2021-11-291-0/+11
| | | | | | | | | | | | | Add blk_mq_complete_request_direct() which completes the block request directly instead deferring it to softirq for single queue devices. This is useful for devices which complete the requests in preemptible context and raising softirq from means scheduling ksoftirqd. Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de> Reviewed-by: Christoph Hellwig <hch@lst.de> Link: https://lore.kernel.org/r/20211025070658.1565848-2-bigeasy@linutronix.de Signed-off-by: Jens Axboe <axboe@kernel.dk>
* block: remove rq_flush_dcache_pagesChristoph Hellwig2021-11-291-10/+0
| | | | | | | | | | This function is trivial, and flush_dcache_page is always defined, so just open code it in the 2.5 callers. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com> Link: https://lore.kernel.org/r/20211117061404.331732-3-hch@lst.de Signed-off-by: Jens Axboe <axboe@kernel.dk>
* block: move blk_rq_err_bytes to scsiChristoph Hellwig2021-11-291-3/+0
| | | | | | | | | blk_rq_err_bytes is only used by the scsi midlayer, so move it there. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com> Link: https://lore.kernel.org/r/20211117061404.331732-2-hch@lst.de Signed-off-by: Jens Axboe <axboe@kernel.dk>
* Merge tag 'for-5.16/block-2021-11-09' of git://git.kernel.dk/linux-blockLinus Torvalds2021-11-091-0/+1
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Pull block fixes from Jens Axboe: - Set of fixes for the batched tag allocation (Ming, me) - add_disk() error handling fix (Luis) - Nested queue quiesce fixes (Ming) - Shared tags init error handling fix (Ye) - Misc cleanups (Jean, Ming, me) * tag 'for-5.16/block-2021-11-09' of git://git.kernel.dk/linux-block: nvme: wait until quiesce is done scsi: make sure that request queue queiesce and unquiesce balanced scsi: avoid to quiesce sdev->request_queue two times blk-mq: add one API for waiting until quiesce is done blk-mq: don't free tags if the tag_set is used by other device in queue initialztion block: fix device_add_disk() kobject_create_and_add() error handling block: ensure cached plug request matches the current queue block: move queue enter logic into blk_mq_submit_bio() block: make bio_queue_enter() fast-path available inline block: split request allocation components into helpers block: have plug stored requests hold references to the queue blk-mq: update hctx->nr_active in blk_mq_end_request_batch() blk-mq: add RQF_ELV debug entry blk-mq: only try to run plug merge if request has same queue with incoming bio block: move RQF_ELV setting into allocators dm: don't stop request queue after the dm device is suspended block: replace always false argument with 'false' block: assign correct tag before doing prefetch of request blk-mq: fix redundant check of !e expression
| * blk-mq: add one API for waiting until quiesce is doneMing Lei2021-11-091-0/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Some drivers(NVMe, SCSI) need to call quiesce and unquiesce in pair, but it is hard to switch to this style, so these drivers need one atomic flag for helping to balance quiesce and unquiesce. When quiesce is in-progress, the driver still needs to wait until the quiesce is done, so add API of blk_mq_wait_quiesce_done() for these drivers. Signed-off-by: Ming Lei <ming.lei@redhat.com> Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com> Link: https://lore.kernel.org/r/20211109071144.181581-2-ming.lei@redhat.com Signed-off-by: Jens Axboe <axboe@kernel.dk>
* | block: remove blk_{get,put}_requestChristoph Hellwig2021-10-291-3/+0
| | | | | | | | | | | | | | | | | | | | These are now pointless wrappers around blk_mq_{alloc,free}_request, so remove them. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Chaitanya Kulkarni <kch@nvidia.com> Link: https://lore.kernel.org/r/20211025070517.1548584-3-hch@lst.de Signed-off-by: Jens Axboe <axboe@kernel.dk>
* | block: remove the initialize_rq_fn blk_mq_ops methodChristoph Hellwig2021-10-221-5/+0
|/ | | | | | | | | Entirely unused now. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Hannes Reinecke <hare@suse.de> Link: https://lore.kernel.org/r/20211021060607.264371-7-hch@lst.de Signed-off-by: Jens Axboe <axboe@kernel.dk>
* blk-crypto: rename blk_keyslot_manager to blk_crypto_profileEric Biggers2021-10-211-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | blk_keyslot_manager is misnamed because it doesn't necessarily manage keyslots. It actually does several different things: - Contains the crypto capabilities of the device. - Provides functions to control the inline encryption hardware. Originally these were just for programming/evicting keyslots; however, new functionality (hardware-wrapped keys) will require new functions here which are unrelated to keyslots. Moreover, device-mapper devices already (ab)use "keyslot_evict" to pass key eviction requests to their underlying devices even though device-mapper devices don't have any keyslots themselves (so it really should be "evict_key", not "keyslot_evict"). - Sometimes (but not always!) it manages keyslots. Originally it always did, but device-mapper devices don't have keyslots themselves, so they use a "passthrough keyslot manager" which doesn't actually manage keyslots. This hack works, but the terminology is unnatural. Also, some hardware doesn't have keyslots and thus also uses a "passthrough keyslot manager" (support for such hardware is yet to be upstreamed, but it will happen eventually). Let's stop having keyslot managers which don't actually manage keyslots. Instead, rename blk_keyslot_manager to blk_crypto_profile. This is a fairly big change, since for consistency it also has to update keyslot manager-related function names, variable names, and comments -- not just the actual struct name. However it's still a fairly straightforward change, as it doesn't change any actual functionality. Acked-by: Ulf Hansson <ulf.hansson@linaro.org> # For MMC Reviewed-by: Mike Snitzer <snitzer@redhat.com> Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com> Signed-off-by: Eric Biggers <ebiggers@google.com> Link: https://lore.kernel.org/r/20211018180453.40441-4-ebiggers@kernel.org Signed-off-by: Jens Axboe <axboe@kernel.dk>
* blk-mq: move blk_mq_flush_plug_list to block/blk-mq.hChristoph Hellwig2021-10-201-2/+0
| | | | | | | | This helper is internal to the block layer. Signed-off-by: Christoph Hellwig <hch@lst.de> Link: https://lore.kernel.org/r/20211020144119.142582-3-hch@lst.de Signed-off-by: Jens Axboe <axboe@kernel.dk>
* block: move blk_mq_tag_to_rq() inlineJens Axboe2021-10-191-1/+35
| | | | | | | | | | | This is in the fast path of driver issue or completion, and it's a single array index operation. Move it inline to avoid a function call for it. This does mean making struct blk_mq_tags block layer public, but there's not really much in there. Reviewed-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Jens Axboe <axboe@kernel.dk>
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