user/sven/linux.git/fs/block_dev.c, branch v5.9.2

Merge tag 'for-5.9/io_uring-20200802' of git://git.kernel.dk/linux-block

2020-08-03T20:01:22Z

Pull io_uring updates from Jens Axboe: "Lots of cleanups in here, hardening the code and/or making it easier to read and fixing bugs, but a core feature/change too adding support for real async buffered reads. With the latter in place, we just need buffered write async support and we're done relying on kthreads for the fast path. In detail: - Cleanup how memory accounting is done on ring setup/free (Bijan) - sq array offset calculation fixup (Dmitry) - Consistently handle blocking off O_DIRECT submission path (me) - Support proper async buffered reads, instead of relying on kthread offload for that. This uses the page waitqueue to drive retries from task_work, like we handle poll based retry. (me) - IO completion optimizations (me) - Fix race with accounting and ring fd install (me) - Support EPOLLEXCLUSIVE (Jiufei) - Get rid of the io_kiocb unionizing, made possible by shrinking other bits (Pavel) - Completion side cleanups (Pavel) - Cleanup REQ_F_ flags handling, and kill off many of them (Pavel) - Request environment grabbing cleanups (Pavel) - File and socket read/write cleanups (Pavel) - Improve kiocb_set_rw_flags() (Pavel) - Tons of fixes and cleanups (Pavel) - IORING_SQ_NEED_WAKEUP clear fix (Xiaoguang)" * tag 'for-5.9/io_uring-20200802' of git://git.kernel.dk/linux-block: (127 commits) io_uring: flip if handling after io_setup_async_rw fs: optimise kiocb_set_rw_flags() io_uring: don't touch 'ctx' after installing file descriptor io_uring: get rid of atomic FAA for cq_timeouts io_uring: consolidate *_check_overflow accounting io_uring: fix stalled deferred requests io_uring: fix racy overflow count reporting io_uring: deduplicate __io_complete_rw() io_uring: de-unionise io_kiocb io-wq: update hash bits io_uring: fix missing io_queue_linked_timeout() io_uring: mark ->work uninitialised after cleanup io_uring: deduplicate io_grab_files() calls io_uring: don't do opcode prep twice io_uring: clear IORING_SQ_NEED_WAKEUP after executing task works io_uring: batch put_task_struct() tasks: add put_task_struct_many() io_uring: return locked and pinned page accounting io_uring: don't miscount pinned memory io_uring: don't open-code recv kbuf managment ...

block: integrate bd_start_claiming into __blkdev_get

2020-07-16T15:35:44Z

bd_start_claiming duplicates a lot of the work done in __blkdev_get. Integrate the two functions to avoid the duplicate work, and to do the right thing for the md -ERESTARTSYS corner case. Signed-off-by: Christoph Hellwig Acked-by: Tejun Heo Signed-off-by: Jens Axboe

block: use bd_prepare_to_claim directly in the loop driver

2020-07-16T15:35:44Z

The arcane magic in bd_start_claiming is only needed to be able to claim a block_device that hasn't been fully set up. Switch the loop driver that claims from the ioctl path with a fully set up struct block_device to just use the much simpler bd_prepare_to_claim directly. Signed-off-by: Christoph Hellwig Acked-by: Tejun Heo Signed-off-by: Jens Axboe

block: refactor bd_start_claiming

2020-07-16T15:35:44Z

Move the locking and assignment of bd_claiming from bd_start_claiming to bd_prepare_to_claim. Signed-off-by: Christoph Hellwig Acked-by: Tejun Heo Signed-off-by: Jens Axboe

block: simplify the restart case in __blkdev_get

2020-07-16T15:35:44Z

Insted of duplicating all the cleanup logic jump to the code that cleans up anyway, and restart after that. Signed-off-by: Christoph Hellwig Acked-by: Tejun Heo Signed-off-by: Jens Axboe

block: remove flush_disk

2020-07-08T22:20:01Z

flush_disk has only two callers, so open code it there. That also helps clarifying the error message for the particular case, and allows to remove setting bd_invalidated in check_disk_size_change, which will be cleared again instantly. Signed-off-by: Christoph Hellwig Signed-off-by: Jens Axboe

block: remove the all_bdevs list

2020-07-01T14:08:25Z

Instead just iterate over the inodes for the block device superblock. Reviewed-by: Johannes Thumshirn Signed-off-by: Christoph Hellwig Signed-off-by: Jens Axboe

block: remove the bd_queue field from struct block_device

2020-07-01T14:08:20Z

Just use bd_disk->queue instead. Reviewed-by: Johannes Thumshirn Signed-off-by: Christoph Hellwig Signed-off-by: Jens Axboe

block: remove the bd_block_size field from struct block_device

2020-07-01T14:08:17Z

We can trivially calculate the block size from the inodes i_blkbits variable. Use that instead of keeping two redundant copies of the information in slightly different formats. Reviewed-by: Johannes Thumshirn Signed-off-by: Christoph Hellwig Signed-off-by: Jens Axboe

block: simplify set_init_blocksize

2020-07-01T14:08:17Z

The loop to increase the initial block size doesn't really make any sense, as the AND operation won't match for powers of two if it didn't for the initial block size. Signed-off-by: Christoph Hellwig Signed-off-by: Jens Axboe