kernel/linux.git/fs/splice.c, branch linux-6.0.y

iter_to_pipe(): switch to advancing variant of iov_iter_get_pages()

2022-08-09T02:37:23+00:00

... and untangle the cleanup on failure to add into pipe. Reviewed-by: Jeff Layton Signed-off-by: Al Viro

splice: stop abusing iov_iter_advance() to flush a pipe

2022-08-09T02:37:16+00:00

Use pipe_discard_from() explicitly in generic_file_read_iter(); don't bother with rather non-obvious use of iov_iter_advance() in there. Reviewed-by: Jeff Layton Reviewed-by: Christian Brauner (Microsoft) Signed-off-by: Al Viro

fs: check FMODE_LSEEK to control internal pipe splicing

2022-07-16T13:19:16+00:00

The original direct splicing mechanism from Jens required the input to be a regular file because it was avoiding the special socket case. It also recognized blkdevs as being close enough to a regular file. But it forgot about chardevs, which behave the same way and work fine here. This is an okayish heuristic, but it doesn't totally work. For example, a few chardevs should be spliceable here. And a few regular files shouldn't. This patch fixes this by instead checking whether FMODE_LSEEK is set, which represents decently enough what we need rewinding for when splicing to internal pipes. Fixes: b92ce5589374 ("[PATCH] splice: add direct fd <-> fd splicing support") Cc: Jens Axboe Signed-off-by: Jason A. Donenfeld Signed-off-by: Al Viro

mm: Convert remove_mapping() to take a folio

2022-03-21T16:59:01+00:00

Add kernel-doc and return the number of pages removed in order to get the statistics right in __invalidate_mapping_pages(). Signed-off-by: Matthew Wilcox (Oracle) Reviewed-by: Christoph Hellwig Reviewed-by: Miaohe Lin

splice: Use a folio in page_cache_pipe_buf_try_steal()

2022-03-21T16:59:01+00:00

This saves a lot of calls to compound_head(). Signed-off-by: Matthew Wilcox (Oracle) Reviewed-by: Christoph Hellwig Reviewed-by: Miaohe Lin

Merge tag 'for-5.12/block-2021-02-17' of git://git.kernel.dk/linux-block

2021-02-21T19:02:48+00:00

Pull core block updates from Jens Axboe: "Another nice round of removing more code than what is added, mostly due to Christoph's relentless pursuit of tech debt removal/cleanups. This pull request contains: - Two series of BFQ improvements (Paolo, Jan, Jia) - Block iov_iter improvements (Pavel) - bsg error path fix (Pan) - blk-mq scheduler improvements (Jan) - -EBUSY discard fix (Jan) - bvec allocation improvements (Ming, Christoph) - bio allocation and init improvements (Christoph) - Store bdev pointer in bio instead of gendisk + partno (Christoph) - Block trace point cleanups (Christoph) - hard read-only vs read-only split (Christoph) - Block based swap cleanups (Christoph) - Zoned write granularity support (Damien) - Various fixes/tweaks (Chunguang, Guoqing, Lei, Lukas, Huhai)" * tag 'for-5.12/block-2021-02-17' of git://git.kernel.dk/linux-block: (104 commits) mm: simplify swapdev_block sd_zbc: clear zone resources for non-zoned case block: introduce blk_queue_clear_zone_settings() zonefs: use zone write granularity as block size block: introduce zone_write_granularity limit block: use blk_queue_set_zoned in add_partition() nullb: use blk_queue_set_zoned() to setup zoned devices nvme: cleanup zone information initialization block: document zone_append_max_bytes attribute block: use bi_max_vecs to find the bvec pool md/raid10: remove dead code in reshape_request block: mark the bio as cloned in bio_iov_bvec_set block: set BIO_NO_PAGE_REF in bio_iov_bvec_set block: remove a layer of indentation in bio_iov_iter_get_pages block: turn the nr_iovecs argument to bio_alloc* into an unsigned short block: remove the 1 and 4 vec bvec_slabs entries block: streamline bvec_alloc block: factor out a bvec_alloc_gfp helper block: move struct biovec_slab to bio.c block: reuse BIO_INLINE_VECS for integrity bvecs ...

teach sendfile(2) to handle send-to-pipe directly

2021-01-26T04:29:36+00:00

no point going through the intermediate pipe Signed-off-by: Al Viro

take the guts of file-to-pipe splice into a helper function

2021-01-26T04:29:33+00:00

Signed-off-by: Al Viro

do_splice_to(): move the logics for limiting the read length in

2021-01-26T04:28:41+00:00

Both callers have the identical logics limiting the amount of data we try to read into pipe - no more than would fit into that pipe. Move that into do_splice_to() itself. Signed-off-by: Al Viro

splice: don't generate zero-len segement bvecs

2021-01-25T15:58:24+00:00

iter_file_splice_write() may spawn bvec segments with zero-length. In preparation for prohibiting them, filter out by hand at splice level. Reviewed-by: Christoph Hellwig Signed-off-by: Pavel Begunkov Reviewed-by: Ming Lei Signed-off-by: Jens Axboe