summaryrefslogtreecommitdiff
path: root/io_uring/kbuf.h
AgeCommit message (Collapse)AuthorFilesLines
2022-09-21io_uring: allow buffer recycling in READVDylan Yudaken1-12/+0
In commit 934447a603b2 ("io_uring: do not recycle buffer in READV") a temporary fix was put in io_kbuf_recycle to simply never recycle READV buffers. Instead of that, rather treat READV with REQ_F_BUFFER_SELECTED the same as a READ with REQ_F_BUFFER_SELECTED. Since READV requires iov_len of 1 they are essentially the same. In order to do this inside io_prep_rw() add some validation to check that it is in fact only length 1, and also extract the length of the buffer at prep time. This allows removal of the io_iov_buffer_select codepaths as they are only used from the READV op. Signed-off-by: Dylan Yudaken <dylany@fb.com> Link: https://lore.kernel.org/r/20220907165152.994979-1-dylany@fb.com Signed-off-by: Jens Axboe <axboe@kernel.dk>
2022-09-07io_uring/kbuf: fix not advancing READV kbuf ringPavel Begunkov1-2/+6
When we don't recycle a selected ring buffer we should advance the head of the ring, so don't just skip io_kbuf_recycle() for IORING_OP_READV but adjust the ring. Fixes: 934447a603b22 ("io_uring: do not recycle buffer in READV") Signed-off-by: Pavel Begunkov <asml.silence@gmail.com> Reviewed-by: Dylan Yudaken <dylany@fb.com> Link: https://lore.kernel.org/r/a6d85e2611471bcb5d5dcd63a8342077ddc2d73d.1662480490.git.asml.silence@gmail.com Signed-off-by: Jens Axboe <axboe@kernel.dk>
2022-07-25io_uring: restore bgid in io_put_kbufDylan Yudaken1-2/+7
Attempt to restore bgid. This is needed when recycling unused buffers as the next time around it will want the correct bgid. Signed-off-by: Dylan Yudaken <dylany@fb.com> Link: https://lore.kernel.org/r/20220630091231.1456789-3-dylany@fb.com Signed-off-by: Jens Axboe <axboe@kernel.dk>
2022-07-25io_uring: kbuf: inline io_kbuf_recycle_ring()Hao Xu1-1/+27
Make io_kbuf_recycle_ring() inline since it is the fast path of provided buffer. Signed-off-by: Hao Xu <howeyxu@tencent.com> Link: https://lore.kernel.org/r/20220623130126.179232-1-hao.xu@linux.dev Signed-off-by: Jens Axboe <axboe@kernel.dk>
2022-07-25io_uring: kbuf: kill __io_kbuf_recycle()Hao Xu1-14/+7
__io_kbuf_recycle() is only called in io_kbuf_recycle(). Kill it and tweak the code so that the legacy pbuf and ring pbuf code become clear Signed-off-by: Hao Xu <howeyxu@tencent.com> Link: https://lore.kernel.org/r/20220622055551.642370-1-hao.xu@linux.dev Signed-off-by: Jens Axboe <axboe@kernel.dk>
2022-07-25io_uring: don't inline io_put_kbufPavel Begunkov1-32/+6
io_put_kbuf() is huge, don't bloat the kernel with inlining. Signed-off-by: Pavel Begunkov <asml.silence@gmail.com> Link: https://lore.kernel.org/r/2e21ccf0be471ffa654032914b9430813cae53f8.1655371007.git.asml.silence@gmail.com Reviewed-by: Hao Xu <howeyxu@tencent.com> Signed-off-by: Jens Axboe <axboe@kernel.dk>
2022-07-25io_uring: split provided buffers handling into its own fileJens Axboe1-0/+142
Move both the opcodes related to it, and the internals code dealing with it. Signed-off-by: Jens Axboe <axboe@kernel.dk>