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* docs: block: Fix grammar and spelling mistakes in bfq-iosched.rstKarol Przybylski2024-09-051-11/+11
| | | | | | | | | | This patch corrects several grammar and spelling errors in the Documentation/block/bfq-iosched.rst file. These changes improve the clarity and readability of the documentation. Signed-off-by: Karol Przybylski <karprzy7@gmail.com> Signed-off-by: Jonathan Corbet <corbet@lwn.net> Link: https://lore.kernel.org/r/20240814155558.3672833-1-karprzy7@gmail.com
* block: fix spelling and grammar for in writeback_cache_control.rstChristoph Hellwig2024-06-201-3/+3
| | | | | | | | | | Suggested-by: Damien Le Moal <dlemoal@kernel.org> Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Damien Le Moal <dlemoal@kernel.org> Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com> Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com> Link: https://lore.kernel.org/r/20240619154623.450048-3-hch@lst.de Signed-off-by: Jens Axboe <axboe@kernel.dk>
* block: move cache control settings out of queue->flagsChristoph Hellwig2024-06-191-29/+38
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Move the cache control settings into the queue_limits so that the flags can be set atomically with the device queue frozen. Add new features and flags field for the driver set flags, and internal (usually sysfs-controlled) flags in the block layer. Note that we'll eventually remove enough field from queue_limits to bring it back to the previous size. The disable flag is inverted compared to the previous meaning, which means it now survives a rescan, similar to the max_sectors and max_discard_sectors user limits. The FLUSH and FUA flags are now inherited by blk_stack_limits, which simplified the code in dm a lot, but also causes a slight behavior change in that dm-switch and dm-unstripe now advertise a write cache despite setting num_flush_bios to 0. The I/O path will handle this gracefully, but as far as I can tell the lack of num_flush_bios and thus flush support is a pre-existing data integrity bug in those targets that really needs fixing, after which a non-zero num_flush_bios should be required in dm for targets that map to underlying devices. Signed-off-by: Christoph Hellwig <hch@lst.de> Acked-by: Ulf Hansson <ulf.hansson@linaro.org> Reviewed-by: Damien Le Moal <dlemoal@kernel.org> Reviewed-by: Hannes Reinecke <hare@suse.de> Link: https://lore.kernel.org/r/20240617060532.127975-14-hch@lst.de Signed-off-by: Jens Axboe <axboe@kernel.dk>
* block: move integrity information into queue_limitsChristoph Hellwig2024-06-141-46/+3
| | | | | | | | | | | | | | | | | | | | | | | | Move the integrity information into the queue limits so that it can be set atomically with other queue limits, and that the sysfs changes to the read_verify and write_generate flags are properly synchronized. This also allows to provide a more useful helper to stack the integrity fields, although it still is separate from the main stacking function as not all stackable devices want to inherit the integrity settings. Even with that it greatly simplifies the code in md and dm. Note that the integrity field is moved as-is into the queue limits. While there are good arguments for removing the separate blk_integrity structure, this would cause a lot of churn and might better be done at a later time if desired. However the integrity field in the queue_limits structure is now unconditional so that various ifdefs can be avoided or replaced with IS_ENABLED(). Given that tiny size of it that seems like a worthwhile trade off. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Hannes Reinecke <hare@suse.de> Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com> Link: https://lore.kernel.org/r/20240613084839.1044015-13-hch@lst.de Signed-off-by: Jens Axboe <axboe@kernel.dk>
* Documentation: block: ioprio: Update schedulersChristian Loehle2024-01-181-7/+6
| | | | | | | | | | | | | | | This doc hasn't been touched in a while, in the meantime some new io schedulers were added (e.g. all of mq), some with ioprio support. Also reword the introduction to remove reference to CFQ and the limitation that io priorities only work on reads, which is no longer true. Signed-off-by: Christian Loehle <christian.loehle@arm.com> Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com> Link: https://lore.kernel.org/r/a86cfdc8-016f-40f1-8b58-0cb15d2a792c@arm.com Signed-off-by: Jens Axboe <axboe@kernel.dk>
* Merge tag 'docs-6.7' of git://git.lwn.net/linuxLinus Torvalds2023-11-021-1/+1
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Pull documentation updates from Jonathan Corbet: "The number of commits for documentation is not huge this time around, but there are some significant changes nonetheless: - Some more Spanish-language and Chinese translations - The much-discussed documentation of the confidential-computing threat model - Powerpc and RISCV documentation move under Documentation/arch - these complete this particular bit of documentation churn - A large traditional-Chinese documentation update - A new document on backporting and conflict resolution - Some kernel-doc and Sphinx fixes Plus the usual smattering of smaller updates and typo fixes" * tag 'docs-6.7' of git://git.lwn.net/linux: (40 commits) scripts/kernel-doc: Fix the regex for matching -Werror flag docs: backporting: address feedback Documentation: driver-api: pps: Update PPS generator documentation speakup: Document USB support doc: blk-ioprio: Bring the doc in line with the implementation docs: usb: fix reference to nonexistent file in UVC Gadget docs: doc-guide: mention 'make refcheckdocs' Documentation: fix typo in dynamic-debug howto scripts/kernel-doc: match -Werror flag strictly Documentation/sphinx: Remove the repeated word "the" in comments. docs: sparse: add SPDX-License-Identifier docs/zh_CN: Add subsystem-apis Chinese translation docs/zh_TW: update contents for zh_TW docs: submitting-patches: encourage direct notifications to commenters docs: add backporting and conflict resolution document docs: move riscv under arch docs: update link to powerpc/vmemmap_dedup.rst mm/memory-hotplug: fix typo in documentation docs: move powerpc under arch PCI: Update the devres documentation regarding to pcim_*() ...
| * docs: block: blk-mq.rst: correct places -> placeKuan-Wei Chiu2023-09-221-1/+1
| | | | | | | | | | | | | | | | | | Corrected a typo in the blk-mq.rst documentation where 'places' was incorrectly used instead of 'place'. Signed-off-by: Kuan-Wei Chiu <visitorckw@gmail.com> Signed-off-by: Jonathan Corbet <corbet@lwn.net> Message-ID: <20230902164121.2653109-1-visitorckw@gmail.com>
* | Documentation: Drop or replace remaining mentions of IA64Ard Biesheuvel2023-09-111-3/+0
|/ | | | | | Drop or update mentions of IA64, as appropriate. Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
* Merge tag 'docs-6.6' of git://git.lwn.net/linuxLinus Torvalds2023-08-312-2/+2
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Pull documentation updates from Jonathan Corbet: "Documentation work keeps chugging along; this includes: - Work from Carlos Bilbao to integrate rustdoc output into the generated HTML documentation. This took some work to figure out how to do it without slowing the docs build and without creating people who don't have Rust installed, but Carlos got there - Move the loongarch and mips architecture documentation under Documentation/arch/ - Some more maintainer documentation from Jakub ... plus the usual assortment of updates, translations, and fixes" * tag 'docs-6.6' of git://git.lwn.net/linux: (56 commits) Docu: genericirq.rst: fix irq-example input: docs: pxrc: remove reference to phoenix-sim Documentation: serial-console: Fix literal block marker docs/mm: remove references to hmm_mirror ops and clean typos docs/zh_CN: correct regi_chg(),regi_add() to region_chg(),region_add() Documentation: Fix typos Documentation/ABI: Fix typos scripts: kernel-doc: fix macro handling in enums scripts: kernel-doc: parse DEFINE_DMA_UNMAP_[ADDR|LEN] Documentation: riscv: Update boot image header since EFI stub is supported Documentation: riscv: Add early boot document Documentation: arm: Add bootargs to the table of added DT parameters docs: kernel-parameters: Refer to the correct bitmap function doc: update params of memhp_default_state= docs: Add book to process/kernel-docs.rst docs: sparse: fix invalid link addresses docs: vfs: clean up after the iterate() removal docs: Add a section on surveys to the researcher guidelines docs: move mips under arch docs: move loongarch under arch ...
| * Documentation: Fix typosBjorn Helgaas2023-08-182-2/+2
| | | | | | | | | | | | | | | | Fix typos in Documentation. Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> Link: https://lore.kernel.org/r/20230814212822.193684-4-helgaas@kernel.org Signed-off-by: Jonathan Corbet <corbet@lwn.net>
* | mm/page_io: introduce bio_first_folio_all()ZhangPeng2023-08-181-0/+1
|/ | | | | | | | | | | | | | Introduce bio_first_folio_all() to return a folio, which makes it easier to use. Link: https://lkml.kernel.org/r/20230721034451.16412-4-zhangpeng362@huawei.com Signed-off-by: ZhangPeng <zhangpeng362@huawei.com> Suggested-by: Matthew Wilcox (Oracle) <willy@infradead.org> Cc: Christoph Hellwig <hch@infradead.org> Cc: Kefeng Wang <wangkefeng.wang@huawei.com> Cc: Nanyong Sun <sunnanyong@huawei.com> Cc: Sidhartha Kumar <sidhartha.kumar@oracle.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
* Documentation/block: drop the request.rst fileRandy Dunlap2023-05-122-100/+0
| | | | | | | | | | | | | Documentation/block/request.rst is outdated and should be removed. Also delete its entry in the block/index.rst file. Signed-off-by: Randy Dunlap <rdunlap@infradead.org> Cc: Jens Axboe <axboe@kernel.dk> Cc: linux-block@vger.kernel.org Cc: Jonathan Corbet <corbet@lwn.net> Cc: linux-doc@vger.kernel.org Link: https://lore.kernel.org/r/20230507182606.12647-1-rdunlap@infradead.org Signed-off-by: Jens Axboe <axboe@kernel.dk>
* blk-crypto: remove blk_crypto_insert_cloned_request()Eric Biggers2023-03-161-2/+1
| | | | | | | | | | blk_crypto_insert_cloned_request() is the same as blk_crypto_rq_get_keyslot(), so just use that directly. Signed-off-by: Eric Biggers <ebiggers@google.com> Reviewed-by: Christoph Hellwig <hch@lst.de> Link: https://lore.kernel.org/r/20230315183907.53675-2-ebiggers@kernel.org Signed-off-by: Jens Axboe <axboe@kernel.dk>
* block: stub out and deprecated the capability attribute on the gendiskChristoph Hellwig2023-02-062-11/+0
| | | | | | | | | | | | | | | | The capability attribute was added in 2017 to expose the kernel internal GENHD_FL_MEDIA_CHANGE_NOTIFY to userspace without ever adding a value to an UAPI header, and without ever setting it in any driver until it was finally removed in Linux 5.7. Deprecate the file and always return 0 instead of exposing the other internal and frequently renumbered other gendisk flags. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Chaitanya Kulkarni <kch@nvidia.com> Reviewed-by: Bart Van Assche <bvanassche@acm.org> Link: https://lore.kernel.org/r/20230203150209.3199115-1-hch@lst.de Signed-off-by: Jens Axboe <axboe@kernel.dk>
* block: ublk: fix doc build warningMing Lei2023-01-291-0/+6
| | | | | | | | | | | | | Fix the following warning: Documentation/block/ublk.rst:157: WARNING: Enumerated list ends without a blank line; unexpected unindent. Documentation/block/ublk.rst:171: WARNING: Enumerated list ends without a blank line; unexpected unindent. Fixes: 56f5160bc1b8 ("ublk_drv: add mechanism for supporting unprivileged ublk device") Reported-by: Stephen Rothwell <sfr@canb.auug.org.au> Signed-off-by: Ming Lei <ming.lei@redhat.com> Link: https://lore.kernel.org/r/20230118042318.127900-1-ming.lei@redhat.com Signed-off-by: Jens Axboe <axboe@kernel.dk>
* ublk_drv: add mechanism for supporting unprivileged ublk deviceMing Lei2023-01-291-9/+40
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | unprivileged ublk device is helpful for container use case, such as: ublk device created in one unprivileged container can be controlled and accessed by this container only. Implement this feature by adding flag of UBLK_F_UNPRIVILEGED_DEV, and if this flag isn't set, any control command has been run from privileged user. Otherwise, any control command can be sent from any unprivileged user, but the user has to be permitted to access the ublk char device to be controlled. In case of UBLK_F_UNPRIVILEGED_DEV: 1) for command UBLK_CMD_ADD_DEV, it is always allowed, and user needs to provide owner's uid/gid in this command, so that udev can set correct ownership for the created ublk device, since the device owner uid/gid can be queried via command of UBLK_CMD_GET_DEV_INFO. 2) for other control commands, they can only be run successfully if the current user is allowed to access the specified ublk char device, for running the permission check, path of the ublk char device has to be provided by these commands. Also add one control of command UBLK_CMD_GET_DEV_INFO2 which always include the char dev path in payload since userspace may not have knowledge if this device is created in unprivileged mode. For applying this mechanism, system administrator needs to take the following policies: 1) chmod 0666 /dev/ublk-control 2) change ownership of ublkcN & ublkbN - chown owner_uid:owner_gid /dev/ublkcN - chown owner_uid:owner_gid /dev/ublkbN Both can be done via one simple udev rule. Userspace: https://github.com/ming1/ubdsrv/tree/unprivileged-ublk 'ublk add -t $TYPE --un_privileged=1' is for creating one un-privileged ublk device if the user is un-privileged. Link: https://lore.kernel.org/linux-block/YoOr6jBfgVm8GvWg@stefanha-x1.localdomain/ Suggested-by: Stefan Hajnoczi <stefanha@redhat.com> Signed-off-by: Ming Lei <ming.lei@redhat.com> Link: https://lore.kernel.org/r/20230106041711.914434-7-ming.lei@redhat.com Signed-off-by: Jens Axboe <axboe@kernel.dk>
* blk-crypto: don't use struct request_queue for public interfacesChristoph Hellwig2022-11-211-6/+6
| | | | | | | | | | | Switch all public blk-crypto interfaces to use struct block_device arguments to specify the device they operate on instead of th request_queue, which is a block layer implementation detail. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Eric Biggers <ebiggers@google.com> Link: https://lore.kernel.org/r/20221114042944.1009870-2-hch@lst.de Signed-off-by: Jens Axboe <axboe@kernel.dk>
* Documentation: document ublk user recovery featureZiyangZhang2022-10-181-0/+36
| | | | | | | | | Add documentation for user recovery feature of ublk subsystem. Signed-off-by: ZiyangZhang <ZiyangZhang@linux.alibaba.com> Reviewed-by: Ming Lei <ming.lei@redhat.com> Link: https://lore.kernel.org/r/20221018045346.99706-2-ZiyangZhang@linux.alibaba.com Signed-off-by: Jens Axboe <axboe@kernel.dk>
* Documentation: document ublkMing Lei2022-09-022-0/+254
| | | | | | | | | | | | | | | Add documentation for ublk subsystem. It was supposed to be documented when merging the driver, but missing at that time. Cc: Bagas Sanjaya <bagasdotme@gmail.com> Cc: Jonathan Corbet <corbet@lwn.net> Cc: Richard W.M. Jones <rjones@redhat.com> Cc: Xiaoguang Wang <xiaoguang.wang@linux.alibaba.com> Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com> Reviewed-by: ZiyangZhang <ZiyangZhang@linux.alibaba.com> Signed-off-by: Ming Lei <ming.lei@redhat.com> [axboe: correct MAINTAINERS addition] Signed-off-by: Jens Axboe <axboe@kernel.dk>
* null_blk: add module parameters for 4 optionsVincent Fu2022-08-031-0/+22
| | | | | | | | | | | | | | | | | | | | | Add as module parameters these options: memory_backed discard mbps cache_size Previously these could only be set via configfs. Still missing is bad_blocks. The kernel test robot found a documentation formatting issue in v1 of this patch. Reported-by: kernel test robot <lkp@intel.com> Signed-off-by: Vincent Fu <vincent.fu@samsung.com> Link: https://lore.kernel.org/r/20220708174943.87787-2-vincent.fu@samsung.com Signed-off-by: Jens Axboe <axboe@kernel.dk>
* block: remove biodoc.rstChristoph Hellwig2022-02-152-1156/+0
| | | | | | | | | | | | This document is completely out of date and extremely misleading. In general the existing kerneldoc comment serve as a much better documentation of the still existing functionality, while the history blurbs are pretty much irrelevant today. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com> Link: https://lore.kernel.org/r/20220215081047.3693582-1-hch@lst.de Signed-off-by: Jens Axboe <axboe@kernel.dk>
* docs: block: biodoc.rst: Drop the obsolete and incorrect contentBarry Song2022-02-111-5/+1
| | | | | | | | | | | | | Since commit 7eaceaccab5f ("block: remove per-queue plugging"), kernel has removed blk_run_address_space(), blk_unplug() and sync_buffer(), and moved to on-stack plugging. The document has been obsolete for years. Given that there is no obvious counterparts in the new mechinism to replace old APIs, this patch drops the content directly. Signed-off-by: Barry Song <song.bao.hua@hisilicon.com> Link: https://lore.kernel.org/r/20220207074931.20067-1-song.bao.hua@hisilicon.com Signed-off-by: Jens Axboe <axboe@kernel.dk>
* block: pass a block_device to bio_clone_fastChristoph Hellwig2022-02-041-5/+0
| | | | | | | | | | Pass a block_device to bio_clone_fast and __bio_clone_fast and give the functions more suitable names. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Mike Snitzer <snitzer@redhat.com> Link: https://lore.kernel.org/r/20220202160109.108149-14-hch@lst.de Signed-off-by: Jens Axboe <axboe@kernel.dk>
* block: remove genhd.hChristoph Hellwig2022-02-021-1/+1
| | | | | | | | | | | | There is no good reason to keep genhd.h separate from the main blkdev.h header that includes it. So fold the contents of genhd.h into blkdev.h and remove genhd.h entirely. 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/20220124093913.742411-4-hch@lst.de Signed-off-by: Jens Axboe <axboe@kernel.dk>
* docs: block: remove queue-sysfs.rstEric Biggers2022-01-102-322/+0
| | | | | | | | | | | | | This has been replaced by Documentation/ABI/stable/sysfs-block, which is the correct place for sysfs documentation. Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Reviewed-by: Hannes Reinecke <hare@suse.de> Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com> Reviewed-by: Bart Van Assche <bvanassche@acm.org> Signed-off-by: Eric Biggers <ebiggers@google.com> Link: https://lore.kernel.org/r/20211209003833.6396-8-ebiggers@kernel.org Signed-off-by: Jens Axboe <axboe@kernel.dk>
* Merge tag 'docs-5.16' of git://git.lwn.net/linuxLinus Torvalds2021-11-031-4/+5
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Pull documentation updates from Jonathan Corbet: "This is a relatively unexciting cycle for documentation. - Some small scripts/kerneldoc fixes - More Chinese translation work, but at a much reduced rate. - The tip-tree maintainer's handbook ...plus the usual array of build fixes, typo fixes, etc" * tag 'docs-5.16' of git://git.lwn.net/linux: (53 commits) kernel-doc: support DECLARE_PHY_INTERFACE_MASK() docs/zh_CN: add core-api xarray translation docs/zh_CN: add core-api assoc_array translation speakup: Fix typo in documentation "boo" -> "boot" docs: submitting-patches: make section about the Link: tag more explicit docs: deprecated.rst: Clarify open-coded arithmetic with literals scripts: documentation-file-ref-check: fix bpf selftests path scripts: documentation-file-ref-check: ignore hidden files coding-style.rst: trivial: fix location of driver model macros docs: f2fs: fix text alignment docs/zh_CN add PCI pci.rst translation docs/zh_CN add PCI index.rst translation docs: translations: zh_CN: memory-hotplug.rst: fix a typo docs: translations: zn_CN: irq-affinity.rst: add a missing extension block: add documentation for inflight scripts: kernel-doc: Ignore __alloc_size() attribute docs: pdfdocs: Adjust \headheight for fancyhdr docs: UML: user_mode_linux_howto_v2 edits docs: use the lore redirector everywhere docs: proc.rst: mountinfo: align columns ...
| * docs: block: fix discard_max_bytes referencesStephen Kitt2021-09-141-4/+5
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | When discard_max_hw_bytes was introduced, in commit 0034af036554 ("block: make /sys/block/<dev>/queue/discard_max_bytes writeable"), the discard_max_bytes documentation section was renamed to discard_max_hw_bytes, but the references it contains to discard_max_bytes weren't updated. This patch refers to discard_max_hw_bytes instead. It also reflows the paragraph so that sentences end lines. Signed-off-by: Stephen Kitt <steve@sk2.org> Link: https://lore.kernel.org/r/20210910105142.2116749-1-steve@sk2.org Signed-off-by: Jonathan Corbet <corbet@lwn.net>
* | Merge tag 'fscrypt-for-linus' of git://git.kernel.org/pub/scm/fs/fscrypt/fscryptLinus Torvalds2021-11-011-0/+2
|\ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Pull fscrypt updates from Eric Biggers: "Some cleanups for fs/crypto/: - Allow 256-bit master keys with AES-256-XTS - Improve documentation and comments - Remove unneeded field fscrypt_operations::max_namelen" * tag 'fscrypt-for-linus' of git://git.kernel.org/pub/scm/fs/fscrypt/fscrypt: fscrypt: improve a few comments fscrypt: allow 256-bit master keys with AES-256-XTS fscrypt: improve documentation for inline encryption fscrypt: clean up comments in bio.c fscrypt: remove fscrypt_operations::max_namelen
| * | fscrypt: improve documentation for inline encryptionEric Biggers2021-09-211-0/+2
| |/ | | | | | | | | | | | | | | | | | | | | | | | | | | Currently the fscrypt inline encryption support is documented in the "Implementation details" section, and it doesn't go into much detail. It's really more than just an "implementation detail" though, as there is a user-facing mount option. Also, hardware-wrapped key support (an upcoming feature) will depend on inline encryption and will affect the on-disk format; by definition that's not just an implementation detail. Therefore, move this documentation into its own section and expand it. Link: https://lore.kernel.org/r/20210916174928.65529-4-ebiggers@kernel.org Signed-off-by: Eric Biggers <ebiggers@google.com>
* | doc: Fix typo in request queue sysfs documentationDamien Le Moal2021-10-271-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | Fix a typo (are -> as) in the introduction paragraph of Documentation/block/queue-sysfs.rst. Signed-off-by: Damien Le Moal <damien.lemoal@wdc.com> Reviewed-by: Hannes Reinecke <hare@suse.de> Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com> Reviewed-by: Keith Busch <kbusch@kernel.org> Link: https://lore.kernel.org/r/20211027022223.183838-6-damien.lemoal@wdc.com Signed-off-by: Jens Axboe <axboe@kernel.dk>
* | doc: document sysfs queue/independent_access_ranges attributesDamien Le Moal2021-10-271-0/+31
| | | | | | | | | | | | | | | | | | | | | | | | | | Update the file Documentation/block/queue-sysfs.rst to add a description of a device queue sysfs entries related to independent access ranges (e.g. concurrent positioning ranges for multi-actuator hard-disks). Signed-off-by: Damien Le Moal <damien.lemoal@wdc.com> Reviewed-by: Hannes Reinecke <hare@suse.de> Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com> Reviewed-by: Keith Busch <kbusch@kernel.org> Link: https://lore.kernel.org/r/20211027022223.183838-5-damien.lemoal@wdc.com Signed-off-by: Jens Axboe <axboe@kernel.dk>
* | blk-crypto: update inline encryption documentationEric Biggers2021-10-211-206/+245
|/ | | | | | | | | | | | | Rework most of inline-encryption.rst to be easier to follow, to correct some information, to add some important details and remove some unimportant details, and to take into account the renaming from blk_keyslot_manager to blk_crypto_profile. 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/20211018180453.40441-5-ebiggers@kernel.org Signed-off-by: Jens Axboe <axboe@kernel.dk>
* Documentation: block: blk-mq: Fix small typo in multi-queue docsJinay Jain2021-08-241-1/+1
| | | | | | | | Fixed a small typo in the documentation for multi-queue block IO. Signed-off-by: Jinay Jain <jinaybjain@gmail.com> Link: https://lore.kernel.org/r/20210812152528.300668-1-jinaybjain@gmail.com Signed-off-by: Jonathan Corbet <corbet@lwn.net>
* Merge tag 'for-5.14/block-2021-06-29' of git://git.kernel.dk/linux-blockLinus Torvalds2021-06-301-11/+27
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Pull core block updates from Jens Axboe: - disk events cleanup (Christoph) - gendisk and request queue allocation simplifications (Christoph) - bdev_disk_changed cleanups (Christoph) - IO priority improvements (Bart) - Chained bio completion trace fix (Edward) - blk-wbt fixes (Jan) - blk-wbt enable/disable fix (Zhang) - Scheduler dispatch improvements (Jan, Ming) - Shared tagset scheduler improvements (John) - BFQ updates (Paolo, Luca, Pietro) - BFQ lock inversion fix (Jan) - Documentation improvements (Kir) - CLONE_IO block cgroup fix (Tejun) - Remove of ancient and deprecated block dump feature (zhangyi) - Discard merge fix (Ming) - Misc fixes or followup fixes (Colin, Damien, Dan, Long, Max, Thomas, Yang) * tag 'for-5.14/block-2021-06-29' of git://git.kernel.dk/linux-block: (129 commits) block: fix discard request merge block/mq-deadline: Remove a WARN_ON_ONCE() call blk-mq: update hctx->dispatch_busy in case of real scheduler blk: Fix lock inversion between ioc lock and bfqd lock bfq: Remove merged request already in bfq_requests_merged() block: pass a gendisk to bdev_disk_changed block: move bdev_disk_changed block: add the events* attributes to disk_attrs block: move the disk events code to a separate file block: fix trace completion for chained bio block/partitions/msdos: Fix typo inidicator -> indicator block, bfq: reset waker pointer with shared queues block, bfq: check waker only for queues with no in-flight I/O block, bfq: avoid delayed merge of async queues block, bfq: boost throughput by extending queue-merging times block, bfq: consider also creation time in delayed stable merge block, bfq: fix delayed stable merge check block, bfq: let also stably merged queues enjoy weight raising blk-wbt: make sure throttle is enabled properly blk-wbt: introduce a new disable state to prevent false positive by rwb_enabled() ...
| * docs: block/bfq: describe per-device weightKir Kolyshkin2021-06-161-11/+27
| | | | | | | | | | | | | | | | | | | | | | | | | | The functionality of setting per-device weight for BFQ was added in v5.4 (commit 795fe54c2a828099), but the documentation was never updated. While at it, improve formatting a bit. Signed-off-by: Kir Kolyshkin <kolyshkin@gmail.com> Link: https://lore.kernel.org/r/20210614214109.207430-1-kolyshkin@gmail.com Acked-by: Tejun Heo <tj@kernel.org> Signed-off-by: Jens Axboe <axboe@kernel.dk>
* | docs: block: biodoc.rst: avoid using ReST :doc:`foo` markupMauro Carvalho Chehab2021-06-171-1/+1
| | | | | | | | | | | | | | | | | | The :doc:`foo` tag is auto-generated via automarkup.py. So, use the filename at the sources, instead of :doc:`foo`. Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org> Link: https://lore.kernel.org/r/1d26256b305e02da82a6a990910a5b5fb9a0355e.1623824363.git.mchehab+huawei@kernel.org Signed-off-by: Jonathan Corbet <corbet@lwn.net>
* | docs: block: fix stat.rst document errorGao Mingfei2021-06-041-1/+1
| | | | | | | | | | | | | | | | | | Update the description of the device stat files to include the proper number of fields. Signed-off-by: Gao Mingfei <g199209@gmail.com> Link: https://lore.kernel.org/r/20210601085145.3273-1-g199209@gmail.com Signed-off-by: Jonathan Corbet <corbet@lwn.net>
* | docs: block: blk-mq.rst: correct drive -> driverYue Hu2021-05-201-2/+2
|/ | | | | | | | It is 'driver' to complete the request. Also remove a redundant space. Signed-off-by: Yue Hu <huyue2@yulong.com> Link: https://lore.kernel.org/r/20210520074225.1989-1-zbestahu@gmail.com Signed-off-by: Jonathan Corbet <corbet@lwn.net>
* Documentation: drop optional BOMsRandy Dunlap2021-05-101-1/+1
| | | | | | | | | | | | | | | | | | | | A few of the Documentation .rst files begin with a Unicode byte order mark (BOM). The BOM may signify endianess for 16-bit or 32-bit encodings or indicate that the text stream is indeed Unicode. We don't need it for either of those uses. It may also interfere with (confuse) some software. Since we don't need it and its use is optional, just delete the uses of it in Documentation/. https://en.wikipedia.org/wiki/Byte_order_mark Signed-off-by: Randy Dunlap <rdunlap@infradead.org> Reviewed-by: Matthew Wilcox (Oracle) <willy@infradead.org> Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: Mauro Carvalho Chehab <mchehab+samsung@kernel.org> Link: https://lore.kernel.org/r/20210506231907.14359-1-rdunlap@infradead.org Signed-off-by: Jonathan Corbet <corbet@lwn.net>
* block/bfq: update comments and default value in docs for fifo_expireJoseph Qi2021-03-021-2/+2
| | | | | | | | | | | Correct the comments since bfq_fifo_expire[0] is for async request, while bfq_fifo_expire[1] is for sync request. Also update docs, according the source code, the default fifo_expire_async is 250ms, and fifo_expire_sync is 125ms. Signed-off-by: Joseph Qi <joseph.qi@linux.alibaba.com> Acked-by: Paolo Valente <paolo.valente@linaro.org> Signed-off-by: Jens Axboe <axboe@kernel.dk>
* Merge tag 'mmc-v5.12' of git://git.kernel.org/pub/scm/linux/kernel/git/ulfh/mmcLinus Torvalds2021-02-221-6/+6
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Pull MMC updates from Ulf Hansson: "MMC core: - Add support for eMMC inline encryption - Add a helper function to parse DT properties for clock phases - Some improvements and cleanups for the mmc_test module MMC host: - android-goldfish: Remove driver - cqhci: Add support for eMMC inline encryption - dw_mmc-zx: Remove driver - meson-gx: Extend support for scatter-gather to allow SD_IO_RW_EXTENDED - mmci: Add support for probing bus voltage level translator - mtk-sd: Address race condition for request timeouts - sdhci_am654: Add Support for the variant on TI's AM64 SoC - sdhci-esdhc-imx: Prevent kernel panic at ->remove() - sdhci-iproc: Add ACPI bindings for the RPi to enable SD and WiFi on RPi4 - sdhci-msm: Add Inline Crypto Engine support - sdhci-msm: Use actual_clock to improve timeout calculations - sdhci-of-aspeed: Add Andrew Jeffery as maintainer - sdhci-of-aspeed: Extend clock support for the AST2600 variant - sdhci-pci-gli: Increase idle period for low power state for GL9763E - sdhci-pci-o2micro: Make tuning for SDR104 HW more robust - sdhci-sirf: Remove driver - sdhci-xenon: Add support for the AP807 variant - sunxi-mmc: Add support for the A100 variant - sunxi-mmc: Ensure host is suspended during system sleep - tmio: Add detection of data timeout errors - tmio/renesas_sdhi: Extend support for retuning - renesas_sdhi_internal_dmac: Add support for the ->pre|post_req() ops" * tag 'mmc-v5.12' of git://git.kernel.org/pub/scm/linux/kernel/git/ulfh/mmc: (86 commits) mmc: sdhci-esdhc-imx: fix kernel panic when remove module mmc: host: Retire MMC_GOLDFISH mmc: cb710: Use new tasklet API mmc: sdhci-pci-o2micro: Bug fix for SDR104 HW tuning failure mmc: mmc_test: use erase_arg for mmc_erase command mmc: wbsd: Use new tasklet API mmc: via-sdmmc: Use new tasklet API mmc: uniphier-sd: Use new tasklet API mmc: tifm_sd: Use new tasklet API mmc: s3cmci: Use new tasklet API mmc: omap: Use new tasklet API mmc: dw_mmc: Use new tasklet API mmc: au1xmmc: Use new tasklet API mmc: atmel-mci: Use new tasklet API mmc: cavium: Replace spin_lock_irqsave with spin_lock in hard IRQ mmc: queue: Remove unused define mmc: core: Drop redundant bouncesz from struct mmc_card mmc: core: Drop redundant member in struct mmc host mmc: core: Use host instead of card argument to mmc_spi_send_csd() mmc: core: Exclude unnecessary header file ...
| * block/keyslot-manager: introduce devm_blk_ksm_init()Eric Biggers2021-02-011-6/+6
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Add a resource-managed variant of blk_ksm_init() so that drivers don't have to worry about calling blk_ksm_destroy(). Note that the implementation uses a custom devres action to call blk_ksm_destroy() rather than switching the two allocations to be directly devres-managed, e.g. with devm_kmalloc(). This is because we need to keep zeroing the memory containing the keyslots when it is freed, and also because we want to continue using kvmalloc() (and there is no devm_kvmalloc()). Signed-off-by: Eric Biggers <ebiggers@google.com> Reviewed-by: Satya Tangirala <satyat@google.com> Acked-by: Jens Axboe <axboe@kernel.dk> Link: https://lore.kernel.org/r/20210121082155.111333-2-ebiggers@kernel.org Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
* | block: introduce zone_write_granularity limitDamien Le Moal2021-02-101-0/+7
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Per ZBC and ZAC specifications, host-managed SMR hard-disks mandate that all writes into sequential write required zones be aligned to the device physical block size. However, NVMe ZNS does not have this constraint and allows write operations into sequential zones to be aligned to the device logical block size. This inconsistency does not help with software portability across device types. To solve this, introduce the zone_write_granularity queue limit to indicate the alignment constraint, in bytes, of write operations into zones of a zoned block device. This new limit is exported as a read-only sysfs queue attribute and the helper blk_queue_zone_write_granularity() introduced for drivers to set this limit. The function blk_queue_set_zoned() is modified to set this new limit to the device logical block size by default. NVMe ZNS devices as well as zoned nullb devices use this default value as is. The scsi disk driver is modified to execute the blk_queue_zone_write_granularity() helper to set the zone write granularity of host-managed SMR disks to the disk physical block size. The accessor functions queue_zone_write_granularity() and bdev_zone_write_granularity() are also introduced. Signed-off-by: Damien Le Moal <damien.lemoal@wdc.com> Reviewed-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com> Reviewed-by: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com> Reviewed-by: Johannes Thumshirn <johannes.thumshirn@edc.com> Signed-off-by: Jens Axboe <axboe@kernel.dk>
* | block: document zone_append_max_bytes attributeDamien Le Moal2021-02-101-0/+6
| | | | | | | | | | | | | | | | | | | | | | | | The description of the zone_append_max_bytes sysfs queue attribute is missing from Documentation/block/queue-sysfs.rst. Add it. Signed-off-by: Damien Le Moal <damien.lemoal@wdc.com> Reviewed-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com> Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com> Reviewed-by: Johannes Thumshirn <johannes.thumshirn@edc.com> Signed-off-by: Jens Axboe <axboe@kernel.dk>
* | bvec/iter: disallow zero-length segment bvecsPavel Begunkov2021-01-251-0/+2
|/ | | | | | | | | | | | | zero-length bvec segments are allowed in general, but not handled by bio and down the block layer so filtered out. This inconsistency may be confusing and prevent from optimisations. As zero-length segments are useless and places that were generating them are patched, declare them not allowed. Reviewed-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Pavel Begunkov <asml.silence@gmail.com> Reviewed-by: Ming Lei <ming.lei@redhat.com> Signed-off-by: Jens Axboe <axboe@kernel.dk>
* Merge tag 'block-5.10-2020-10-24' of git://git.kernel.dk/linux-blockLinus Torvalds2020-10-241-0/+8
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 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[] ...
| * block: add zone specific block statusesKeith Busch2020-10-131-0/+8
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 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>
* | docs: block: blk-mq.rst: get rid of :c:typeMauro Carvalho Chehab2020-10-151-2/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The :c:type macros are not used properly there, as reported by Sphinx 3: ./Documentation/block/blk-mq.rst:112: WARNING: Unparseable C cross-reference: 'hctx->dispatch' Invalid C declaration: Expected end of definition. [error at 4] hctx->dispatch ----^ Also, they won't be generating any cross references. So, replace them by a literal markup. Reviewed-by: André Almeida <andrealmeid@collabora.com> Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
* | docs: get rid of :c:type explicit declarations for structsMauro Carvalho Chehab2020-10-152-8/+8
|/ | | | | | | | | | | | | | | | | | | | | The :c:type:`foo` only works properly with structs before Sphinx 3.x. On Sphinx 3.x, structs should now be declared using the .. c:struct, and referenced via :c:struct tag. As we now have the automarkup.py macro, that automatically convert: struct foo into cross-references, let's get rid of that, solving several warnings when building docs with Sphinx 3.x. Reviewed-by: André Almeida <andrealmeid@collabora.com> # blk-mq.rst Reviewed-by: Takashi Iwai <tiwai@suse.de> # sound Reviewed-by: Mike Rapoport <rppt@linux.ibm.com> Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
* Merge tag 'for-5.9/drivers-20200803' of git://git.kernel.dk/linux-blockLinus Torvalds2020-08-051-0/+14
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Pull block driver updates from Jens Axboe: - NVMe: - ZNS support (Aravind, Keith, Matias, Niklas) - Misc cleanups, optimizations, fixes (Baolin, Chaitanya, David, Dongli, Max, Sagi) - null_blk zone capacity support (Aravind) - MD: - raid5/6 fixes (ChangSyun) - Warning fixes (Damien) - raid5 stripe fixes (Guoqing, Song, Yufen) - sysfs deadlock fix (Junxiao) - raid10 deadlock fix (Vitaly) - struct_size conversions (Gustavo) - Set of bcache updates/fixes (Coly) * tag 'for-5.9/drivers-20200803' of git://git.kernel.dk/linux-block: (117 commits) md/raid5: Allow degraded raid6 to do rmw md/raid5: Fix Force reconstruct-write io stuck in degraded raid5 raid5: don't duplicate code for different paths in handle_stripe raid5-cache: hold spinlock instead of mutex in r5c_journal_mode_show md: print errno in super_written md/raid5: remove the redundant setting of STRIPE_HANDLE md: register new md sysfs file 'uuid' read-only md: fix max sectors calculation for super 1.0 nvme-loop: remove extra variable in create ctrl nvme-loop: set ctrl state connecting after init nvme-multipath: do not fall back to __nvme_find_path() for non-optimized paths nvme-multipath: fix logic for non-optimized paths nvme-rdma: fix controller reset hang during traffic nvme-tcp: fix controller reset hang during traffic nvmet: introduce the passthru Kconfig option nvmet: introduce the passthru configfs interface nvmet: Add passthru enable/disable helpers nvmet: add passthru code to process commands nvme: export nvme_find_get_ns() and nvme_put_ns() nvme: introduce nvme_ctrl_get_by_path() ...
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