kernel/linux.git/include/linux/bio.h, branch v6.19.11

block: move around bio flagging helpers

2025-12-12T19:36:44+00:00

We'll need bio_flagged() earlier in bio.h for later patches, move it together with all related helpers, and mark the bio_flagged()'s bio argument as const. Signed-off-by: Pavel Begunkov Reviewed-by: Christoph Hellwig Signed-off-by: Jens Axboe

block: accumulate memory segment gaps per bio

2025-11-07T01:11:58+00:00

The blk-mq dma iterator has an optimization for requests that align to the device's iommu merge boundary. This boundary may be larger than the device's virtual boundary, but the code had been depending on that queue limit to know ahead of time if the request is guaranteed to align to that optimization. Rather than rely on that queue limit, which many devices may not report, save the lowest set bit of any boundary gap between each segment in the bio while checking the segments. The request stores the value for merging and quickly checking per io if the request can use iova optimizations. Signed-off-by: Keith Busch Reviewed-by: Christoph Hellwig Reviewed-by: Martin K. Petersen Signed-off-by: Jens Axboe

block: rename bio_iov_iter_get_pages_aligned to bio_iov_iter_get_pages

2025-10-07T14:05:44+00:00

Now that the bio_iov_iter_get_pages is free again, use it instead of the more complicated now. Also drop the unused export. Signed-off-by: Christoph Hellwig Reviewed-by: Martin K. Petersen Reviewed-by: Johannes Thumshirn Reviewed-by: Keith Busch Reviewed-by: Qu Wenruo Signed-off-by: Jens Axboe

block: remove bio_iov_iter_get_pages

2025-10-07T14:05:44+00:00

Switch the only caller to bio_iov_iter_get_pages, and explain why it does not have any alignment requirements. Signed-off-by: Christoph Hellwig Reviewed-by: Martin K. Petersen Reviewed-by: Johannes Thumshirn Reviewed-by: Keith Busch Reviewed-by: Qu Wenruo Signed-off-by: Jens Axboe

block: add size alignment to bio_iov_iter_get_pages

2025-09-09T16:27:01+00:00

The block layer tries to align bio vectors to the block device's logical block size. Some cases don't have a block device, or we may need to align to something larger, which we can't derive it from the queue limits. Have the caller specify what they want, or allow any length alignment if nothing was specified. Since the most common use case relies on the block device's limits, a helper function is provided. Signed-off-by: Keith Busch Reviewed-by: Christoph Hellwig Reviewed-by: Martin K. Petersen Signed-off-by: Jens Axboe

block: check for valid bio while splitting

2025-09-09T16:27:01+00:00

We're already iterating every segment, so check these for a valid IO lengths at the same time. Individual segment lengths will not be checked on passthrough commands. The read/write command segments must be sized to the dma alignment. Signed-off-by: Keith Busch Reviewed-by: Christoph Hellwig Reviewed-by: Martin K. Petersen Signed-off-by: Jens Axboe

block: remove the bi_inline_vecs variable sized array from struct bio

2025-09-09T13:31:59+00:00

Bios are embedded into other structures, and at least spare is unhappy about embedding structures with variable sized arrays. There's no real need to the array anyway, we can replace it with a helper pointing to the memory just behind the bio, and with the previous cleanups there is very few site doing anything special with it. Signed-off-by: Christoph Hellwig Reviewed-by: John Garry Signed-off-by: Jens Axboe

block: add a bio_init_inline helper

2025-09-09T13:31:59+00:00

Just a simpler wrapper around bio_init for callers that want to initialize a bio with inline bvecs. Signed-off-by: Christoph Hellwig Reviewed-by: John Garry Reviewed-by: Yu Kuai Signed-off-by: Jens Axboe

bio: Fix bio_first_folio() for SPARSEMEM without VMEMMAP

2025-06-13T12:19:34+00:00

It is possible for physically contiguous folios to have discontiguous struct pages if SPARSEMEM is enabled and SPARSEMEM_VMEMMAP is not. This is correctly handled by folio_page_idx(), so remove this open-coded implementation. Fixes: 640d1930bef4 (block: Add bio_for_each_folio_all()) Signed-off-by: Matthew Wilcox (Oracle) Link: https://lore.kernel.org/r/20250612144126.2849931-1-willy@infradead.org Signed-off-by: Jens Axboe

Merge tag 'for-6.16/block-20250523' of git://git.kernel.dk/linux

2025-05-26T18:39:36+00:00

Pull block updates from Jens Axboe: - ublk updates: - Add support for updating the size of a ublk instance - Zero-copy improvements - Auto-registering of buffers for zero-copy - Series simplifying and improving GET_DATA and request lookup - Series adding quiesce support - Lots of selftests additions - Various cleanups - NVMe updates via Christoph: - add per-node DMA pools and use them for PRP/SGL allocations (Caleb Sander Mateos, Keith Busch) - nvme-fcloop refcounting fixes (Daniel Wagner) - support delayed removal of the multipath node and optionally support the multipath node for private namespaces (Nilay Shroff) - support shared CQs in the PCI endpoint target code (Wilfred Mallawa) - support admin-queue only authentication (Hannes Reinecke) - use the crc32c library instead of the crypto API (Eric Biggers) - misc cleanups (Christoph Hellwig, Marcelo Moreira, Hannes Reinecke, Leon Romanovsky, Gustavo A. R. Silva) - MD updates via Yu: - Fix that normal IO can be starved by sync IO, found by mkfs on newly created large raid5, with some clean up patches for bdev inflight counters - Clean up brd, getting rid of atomic kmaps and bvec poking - Add loop driver specifically for zoned IO testing - Eliminate blk-rq-qos calls with a static key, if not enabled - Improve hctx locking for when a plug has IO for multiple queues pending - Remove block layer bouncing support, which in turn means we can remove the per-node bounce stat as well - Improve blk-throttle support - Improve delay support for blk-throttle - Improve brd discard support - Unify IO scheduler switching. This should also fix a bunch of lockdep warnings we've been seeing, after enabling lockdep support for queue freezing/unfreezeing - Add support for block write streams via FDP (flexible data placement) on NVMe - Add a bunch of block helpers, facilitating the removal of a bunch of duplicated boilerplate code - Remove obsolete BLK_MQ pci and virtio Kconfig options - Add atomic/untorn write support to blktrace - Various little cleanups and fixes * tag 'for-6.16/block-20250523' of git://git.kernel.dk/linux: (186 commits) selftests: ublk: add test for UBLK_F_QUIESCE ublk: add feature UBLK_F_QUIESCE selftests: ublk: add test case for UBLK_U_CMD_UPDATE_SIZE traceevent/block: Add REQ_ATOMIC flag to block trace events ublk: run auto buf unregisgering in same io_ring_ctx with registering io_uring: add helper io_uring_cmd_ctx_handle() ublk: remove io argument from ublk_auto_buf_reg_fallback() ublk: handle ublk_set_auto_buf_reg() failure correctly in ublk_fetch() selftests: ublk: add test for covering UBLK_AUTO_BUF_REG_FALLBACK selftests: ublk: support UBLK_F_AUTO_BUF_REG ublk: support UBLK_AUTO_BUF_REG_FALLBACK ublk: register buffer to local io_uring with provided buf index via UBLK_F_AUTO_BUF_REG ublk: prepare for supporting to register request buffer automatically ublk: convert to refcount_t selftests: ublk: make IO & device removal test more stressful nvme: rename nvme_mpath_shutdown_disk to nvme_mpath_remove_disk nvme: introduce multipath_always_on module param nvme-multipath: introduce delayed removal of the multipath head node nvme-pci: derive and better document max segments limits nvme-pci: use struct_size for allocation struct nvme_dev ...