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* block: remove ->rw_pageChristoph Hellwig2023-02-021-78/+0
| | | | | | | | | | | | | | | | | | | | | | | | | | | The ->rw_page method is a special purpose bypass of the usual bio handling path that is limited to single-page reads and writes and synchronous which causes a lot of extra code in the drivers, callers and the block layer. The only remaining user is the MM swap code. Switch that swap code to simply submit a single-vec on-stack bio an synchronously wait on it based on a newly added QUEUE_FLAG_SYNCHRONOUS flag set by the drivers that currently implement ->rw_page instead. While this touches one extra cache line and executes extra code, it simplifies the block layer and drivers and ensures that all feastures are properly supported by all drivers, e.g. right now ->rw_page bypassed cgroup writeback entirely. [akpm@linux-foundation.org: fix comment typo, per Dan] Link: https://lkml.kernel.org/r/20230125133436.447864-8-hch@lst.de Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Dan Williams <dan.j.williams@intel.com> Cc: Dave Jiang <dave.jiang@intel.com> Cc: Ira Weiny <ira.weiny@intel.com> Cc: Jens Axboe <axboe@kernel.dk> Cc: Keith Busch <kbusch@kernel.org> Cc: Minchan Kim <minchan@kernel.org> Cc: Sergey Senozhatsky <senozhatsky@chromium.org> Cc: Vishal Verma <vishal.l.verma@intel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
* block: bdev & blktrace: use consistent function doc. notationRandy Dunlap2022-12-011-2/+2
| | | | | | | | | | | | | | Use only one hyphen in kernel-doc notation between the function name and its short description. The is the documented kerenl-doc format. It also fixes the HTML presentation to be consistent with other functions. Signed-off-by: Randy Dunlap <rdunlap@infradead.org> Cc: Jens Axboe <axboe@kernel.dk> Cc: linux-block@vger.kernel.org Link: https://lore.kernel.org/r/20221201070331.25685-1-rdunlap@infradead.org Signed-off-by: Jens Axboe <axboe@kernel.dk>
* vfs: support STATX_DIOALIGN on block devicesEric Biggers2022-09-111-0/+23
| | | | | | | | | | | | | | | Add support for STATX_DIOALIGN to block devices, so that direct I/O alignment restrictions are exposed to userspace in a generic way. Note that this breaks the tradition of stat operating only on the block device node, not the block device itself. However, it was felt that doing this is preferable, in order to make the interface useful and avoid needing separate interfaces for regular files and block devices. Signed-off-by: Eric Biggers <ebiggers@google.com> Reviewed-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Christian Brauner (Microsoft) <brauner@kernel.org> Link: https://lore.kernel.org/r/20220827065851.135710-3-ebiggers@kernel.org
* block: stop using bdevname in bdev_write_inodeChristoph Hellwig2022-07-141-6/+4
| | | | | | | | | | | | Just use the %pg format specifier instead. Also reformat the printk statement to be more readable. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Jan Kara <jack@suse.cz> Reviewed-by: Chaitanya Kulkarni <kch@nvidia.com> Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com> Link: https://lore.kernel.org/r/20220713055317.1888500-2-hch@lst.de Signed-off-by: Jens Axboe <axboe@kernel.dk>
* Merge tag 'exfat-for-5.19-rc1' of ↵Linus Torvalds2022-05-241-0/+7
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/linkinjeon/exfat Pull exfat updates from Namjae Jeon: - fix referencing wrong parent directory information during rename - introduce a sys_tz mount option to use system timezone - improve performance while zeroing a cluster with dirsync mount option - fix slab-out-bounds in exat_clear_bitmap() reported from syzbot * tag 'exfat-for-5.19-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/linkinjeon/exfat: exfat: check if cluster num is valid exfat: reduce block requests when zeroing a cluster block: add sync_blockdev_range() exfat: introduce mount option 'sys_tz' exfat: fix referencing wrong parent directory information after renaming
| * block: add sync_blockdev_range()Yuezhang Mo2022-05-231-0/+7
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | sync_blockdev_range() is to support syncing multiple sectors with as few block device requests as possible, it is helpful to make the block device to give full play to its performance. Signed-off-by: Yuezhang Mo <Yuezhang.Mo@sony.com> Suggested-by: Christoph Hellwig <hch@infradead.org> Reviewed-by: Andy Wu <Andy.Wu@sony.com> Reviewed-by: Aoyama Wataru <wataru.aoyama@sony.com> Reviewed-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Jens Axboe <axboe@kernel.dk> Acked-by: Sungjong Seo <sj1557.seo@samsung.com> Signed-off-by: Namjae Jeon <linkinjeon@kernel.org>
* | block: turn bdev->bd_openers into an atomic_tChristoph Hellwig2022-04-181-8/+8
|/ | | | | | | | | | | | | All manipulation of bd_openers is under disk->open_mutex and will remain so for the foreseeable future. But at least one place reads it without the lock (blkdev_get) and there are more to be added. So make sure the compiler does not do turn the increments and decrements into non-atomic sequences by using an atomic_t. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Jan Kara <jack@suse.cz> Link: https://lore.kernel.org/r/20220330052917.2566582-6-hch@lst.de Signed-off-by: Jens Axboe <axboe@kernel.dk>
* Merge branch 'akpm' (patches from Andrew)Linus Torvalds2022-03-221-1/+1
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Merge updates from Andrew Morton: - A few misc subsystems: kthread, scripts, ntfs, ocfs2, block, and vfs - Most the MM patches which precede the patches in Willy's tree: kasan, pagecache, gup, swap, shmem, memcg, selftests, pagemap, mremap, sparsemem, vmalloc, pagealloc, memory-failure, mlock, hugetlb, userfaultfd, vmscan, compaction, mempolicy, oom-kill, migration, thp, cma, autonuma, psi, ksm, page-poison, madvise, memory-hotplug, rmap, zswap, uaccess, ioremap, highmem, cleanups, kfence, hmm, and damon. * emailed patches from Andrew Morton <akpm@linux-foundation.org>: (227 commits) mm/damon/sysfs: remove repeat container_of() in damon_sysfs_kdamond_release() Docs/ABI/testing: add DAMON sysfs interface ABI document Docs/admin-guide/mm/damon/usage: document DAMON sysfs interface selftests/damon: add a test for DAMON sysfs interface mm/damon/sysfs: support DAMOS stats mm/damon/sysfs: support DAMOS watermarks mm/damon/sysfs: support schemes prioritization mm/damon/sysfs: support DAMOS quotas mm/damon/sysfs: support DAMON-based Operation Schemes mm/damon/sysfs: support the physical address space monitoring mm/damon/sysfs: link DAMON for virtual address spaces monitoring mm/damon: implement a minimal stub for sysfs-based DAMON interface mm/damon/core: add number of each enum type values mm/damon/core: allow non-exclusive DAMON start/stop Docs/damon: update outdated term 'regions update interval' Docs/vm/damon/design: update DAMON-Idle Page Tracking interference handling Docs/vm/damon: call low level monitoring primitives the operations mm/damon: remove unnecessary CONFIG_DAMON option mm/damon/paddr,vaddr: remove damon_{p,v}a_{target_valid,set_operations}() mm/damon/dbgfs-test: fix is_target_id() change ...
| * fs: allocate inode by using alloc_inode_sb()Muchun Song2022-03-221-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The inode allocation is supposed to use alloc_inode_sb(), so convert kmem_cache_alloc() of all filesystems to alloc_inode_sb(). Link: https://lkml.kernel.org/r/20220228122126.37293-5-songmuchun@bytedance.com Signed-off-by: Muchun Song <songmuchun@bytedance.com> Acked-by: Theodore Ts'o <tytso@mit.edu> [ext4] Acked-by: Roman Gushchin <roman.gushchin@linux.dev> Cc: Alex Shi <alexs@kernel.org> Cc: Anna Schumaker <Anna.Schumaker@Netapp.com> Cc: Chao Yu <chao@kernel.org> Cc: Dave Chinner <david@fromorbit.com> Cc: Fam Zheng <fam.zheng@bytedance.com> Cc: Jaegeuk Kim <jaegeuk@kernel.org> Cc: Johannes Weiner <hannes@cmpxchg.org> Cc: Kari Argillander <kari.argillander@gmail.com> Cc: Matthew Wilcox (Oracle) <willy@infradead.org> Cc: Michal Hocko <mhocko@kernel.org> Cc: Qi Zheng <zhengqi.arch@bytedance.com> Cc: Shakeel Butt <shakeelb@google.com> Cc: Trond Myklebust <trond.myklebust@hammerspace.com> Cc: Vladimir Davydov <vdavydov.dev@gmail.com> Cc: Vlastimil Babka <vbabka@suse.cz> Cc: Wei Yang <richard.weiyang@gmail.com> Cc: Xiongchun Duan <duanxiongchun@bytedance.com> Cc: Yang Shi <shy828301@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | block: remove redundant semicolonNian Yanchuan2022-02-271-1/+1
| | | | | | | | | | | | | | | | Remove redundant semicolon from block/bdev.c Signed-off-by: Nian Yanchuan <yanchuan@nfschina.com> Link: https://lore.kernel.org/r/20220227170124.GA14658@localhost.localdomain Signed-off-by: Jens Axboe <axboe@kernel.dk>
* | block: default BLOCK_LEGACY_AUTOLOAD to yChristoph Hellwig2022-02-271-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | As Luis reported, losetup currently doesn't properly create the loop device without this if the device node already exists because old scripts created it manually. So default to y for now and remove the aggressive removal schedule. Reported-by: Luis Chamberlain <mcgrof@kernel.org> Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Chaitanya Kulkarni <kch@nvidia.com> Link: https://lore.kernel.org/r/20220225181440.1351591-1-hch@lst.de Signed-off-by: Jens Axboe <axboe@kernel.dk>
* | block: deprecate autoloading based on dev_tChristoph Hellwig2022-02-021-3/+6
|/ | | | | | | | | | Make the legacy dev_t based autoloading optional and add a deprecation warning. This kind of autoloading has ceased to be useful about 20 years ago. Signed-off-by: Christoph Hellwig <hch@lst.de> Link: https://lore.kernel.org/r/20220104071647.164918-1-hch@lst.de Signed-off-by: Jens Axboe <axboe@kernel.dk>
* mm: remove cleancacheChristoph Hellwig2022-01-221-5/+0
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Patch series "remove Xen tmem leftovers". Since the removal of the Xen tmem driver in 2019, the cleancache hooks are entirely unused, as are large parts of frontswap. This series against linux-next (with the folio changes included) removes cleancaches, and cuts down frontswap to the bits actually used by zswap. This patch (of 13): The cleancache subsystem is unused since the removal of Xen tmem driver in commit 814bbf49dcd0 ("xen: remove tmem driver"). [akpm@linux-foundation.org: remove now-unreachable code] Link: https://lkml.kernel.org/r/20211224062246.1258487-1-hch@lst.de Link: https://lkml.kernel.org/r/20211224062246.1258487-2-hch@lst.de Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Juergen Gross <jgross@suse.com> Acked-by: Geert Uytterhoeven <geert@linux-m68k.org> Cc: Konrad Rzeszutek Wilk <Konrad.wilk@oracle.com> Cc: Hugh Dickins <hughd@google.com> Cc: Seth Jennings <sjenning@redhat.com> Cc: Dan Streetman <ddstreet@ieee.org> Cc: Vitaly Wool <vitaly.wool@konsulko.com> Cc: Matthew Wilcox (Oracle) <willy@infradead.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* bdev: Improve lookup_bdev documentationMatthew Wilcox (Oracle)2021-12-131-6/+6
| | | | | | | | | | Add a Context section and rewrite the rest to be clearer. Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org> Reviewed-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Nikolay Borisov <nborisov@suse.com> Link: https://lore.kernel.org/r/20211213171113.3097631-1-willy@infradead.org Signed-off-by: Jens Axboe <axboe@kernel.dk>
* block: Remove redundant initialization of variable retColin Ian King2021-11-291-1/+1
| | | | | | | | | | The variable ret is being initialized with a value that is never read, it is being updated later on. The assignment is redundant and can be removed. Signed-off-by: Colin Ian King <colin.i.king@gmail.com> Link: https://lore.kernel.org/r/20211126230652.1175636-1-colin.i.king@gmail.com Signed-off-by: Jens Axboe <axboe@kernel.dk>
* block: remove the GENHD_FL_HIDDEN check in blkdev_get_no_openChristoph Hellwig2021-11-291-8/+0
| | | | | | | | Hidden gendisks never hash the block device inode, so this can't happen. Signed-off-by: Christoph Hellwig <hch@lst.de> Link: https://lore.kernel.org/r/20211122130625.1136848-8-hch@lst.de Signed-off-by: Jens Axboe <axboe@kernel.dk>
* block: move GENHD_FL_BLOCK_EVENTS_ON_EXCL_WRITE to disk->event_flagsChristoph Hellwig2021-11-291-1/+1
| | | | | | | | | GENHD_FL_BLOCK_EVENTS_ON_EXCL_WRITE is all about the event reporting mechanism, so move it to the event_flags field. Signed-off-by: Christoph Hellwig <hch@lst.de> Link: https://lore.kernel.org/r/20211122130625.1136848-3-hch@lst.de Signed-off-by: Jens Axboe <axboe@kernel.dk>
* block: avoid to touch unloaded module instance when opening bdevMing Lei2021-11-221-5/+7
| | | | | | | | | | | | | | | | | | | | | | | disk->fops->owner is grabbed in blkdev_get_no_open() after the disk kobject refcount is increased. This way can't make sure that disk->fops->owner is still alive since del_gendisk() still can move on if the kobject refcount of disk is grabbed by open() and disk->fops->open() isn't called yet. Fixes the issue by moving try_module_get() into blkdev_get_by_dev() with ->open_mutex() held, then we can drain the in-progress open() in del_gendisk(). Meantime new open() won't succeed because disk becomes not alive. This way is reasonable because blkdev_get_no_open() needn't to touch disk->fops or defined callbacks. Cc: Christoph Hellwig <hch@lst.de> Cc: czhong@redhat.com Signed-off-by: Ming Lei <ming.lei@redhat.com> Reviewed-by: Christoph Hellwig <hch@lst.de> Link: https://lore.kernel.org/r/20211111020343.316126-1-ming.lei@redhat.com Signed-off-by: Jens Axboe <axboe@kernel.dk>
* block: simplify the block device syncing codeChristoph Hellwig2021-10-221-3/+14
| | | | | | | | | Get rid of the indirections and just provide a sync_bdevs helper for the generic sync code. Signed-off-by: Christoph Hellwig <hch@lst.de> Link: https://lore.kernel.org/r/20211019062530.2174626-8-hch@lst.de Signed-off-by: Jens Axboe <axboe@kernel.dk>
* block: remove __sync_blockdevChristoph Hellwig2021-10-221-5/+6
| | | | | | | | | Instead offer a new sync_blockdev_nowait helper for the !wait case. This new helper is exported as it will grow modular callers in a bit. Signed-off-by: Christoph Hellwig <hch@lst.de> Link: https://lore.kernel.org/r/20211019062530.2174626-3-hch@lst.de Signed-off-by: Jens Axboe <axboe@kernel.dk>
* fs: bdev: fix conflicting comment from lookup_bdevJackie Liu2021-10-211-3/+5
| | | | | | | | | | | | | | We switched to directly use dev_t to get block device, lookup changed the meaning of use, now we fix this conflicting comment. Fixes: 4e7b5671c6a8 ("block: remove i_bdev") Cc: Jens Axboe <axboe@kernel.dk> Cc: Christoph Hellwig <hch@lst.de> Cc: linux-fsdevel@vger.kernel.org Signed-off-by: Jackie Liu <liuyun01@kylinos.cn> Reviewed-by: Christoph Hellwig <hch@lst.de> Link: https://lore.kernel.org/r/20211021071344.1600362-1-liu.yun@linux.dev Signed-off-by: Jens Axboe <axboe@kernel.dk>
* block: use bdev_get_queue() in bdev.cPavel Begunkov2021-10-181-4/+4
| | | | | | | | | Convert bdev->bd_disk->queue to bdev_get_queue(), it's uses a cached queue pointer and so is faster. Signed-off-by: Pavel Begunkov <asml.silence@gmail.com> Link: https://lore.kernel.org/r/a352936ce5d9ac719645b1e29b173d931ebcdc02.1634219547.git.asml.silence@gmail.com Signed-off-by: Jens Axboe <axboe@kernel.dk>
* block: cache request queue in bdevPavel Begunkov2021-10-181-0/+1
| | | | | | | | | | | | | | There are tons of places where we need to get a request_queue only having bdev, which turns into bdev->bd_disk->queue. There are probably a hundred of such places considering inline helpers, and enough of them are in hot paths. Cache queue pointer in struct block_device and make use of it in bdev_get_queue(). Signed-off-by: Pavel Begunkov <asml.silence@gmail.com> Link: https://lore.kernel.org/r/a3bfaecdd28956f03629d0ca5c63ebc096e1c809.1634219547.git.asml.silence@gmail.com Signed-off-by: Jens Axboe <axboe@kernel.dk>
* block: move integrity handling out of <linux/blkdev.h>Christoph Hellwig2021-10-181-0/+1
| | | | | | | | | Split the integrity/metadata handling definitions out into a new header. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com> Link: https://lore.kernel.org/r/20210920123328.1399408-17-hch@lst.de Signed-off-by: Jens Axboe <axboe@kernel.dk>
* block: genhd: fix double kfree() in __alloc_disk_node()Tetsuo Handa2021-10-021-1/+1
| | | | | | | | | | | | | | | | | syzbot is reporting use-after-free read at bdev_free_inode() [1], for kfree() from __alloc_disk_node() is called before bdev_free_inode() (which is called after RCU grace period) reads bdev->bd_disk and calls kfree(bdev->bd_disk). Fix use-after-free read followed by double kfree() problem by making sure that bdev->bd_disk is NULL when calling iput(). Link: https://syzkaller.appspot.com/bug?extid=8281086e8a6fbfbd952a [1] Reported-by: syzbot <syzbot+8281086e8a6fbfbd952a@syzkaller.appspotmail.com> Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp> Reviewed-by: Christoph Hellwig <hch@lst.de> Link: https://lore.kernel.org/r/e6dd13c5-8db0-4392-6e78-a42ee5d2a1c4@i-love.sakura.ne.jp Signed-off-by: Jens Axboe <axboe@kernel.dk>
* block: move fs/block_dev.c to block/bdev.cChristoph Hellwig2021-09-071-0/+1058
Move it together with the rest of the block layer. Signed-off-by: Christoph Hellwig <hch@lst.de> Link: https://lore.kernel.org/r/20210907141303.1371844-3-hch@lst.de Signed-off-by: Jens Axboe <axboe@kernel.dk>
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