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linux/io_uring/kbuf.c

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io_uring: split provided buffers handling into its own file Move both the opcodes related to it, and the internals code dealing with it. Signed-off-by: Jens Axboe <axboe@kernel.dk>
2022-06-13 07:07:23 -06:00
io_uring: kbuf: kill __io_kbuf_recycle() __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>
2022-06-22 13:55:51 +08:00
io_uring: split provided buffers handling into its own file Move both the opcodes related to it, and the internals code dealing with it. Signed-off-by: Jens Axboe <axboe@kernel.dk>
2022-06-13 07:07:23 -06:00
io_uring: kbuf: kill __io_kbuf_recycle() __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>
2022-06-22 13:55:51 +08:00
io_uring: split provided buffers handling into its own file Move both the opcodes related to it, and the internals code dealing with it. Signed-off-by: Jens Axboe <axboe@kernel.dk>
2022-06-13 07:07:23 -06:00
io_uring: kbuf: kill __io_kbuf_recycle() __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>
2022-06-22 13:55:51 +08:00
io_uring: split provided buffers handling into its own file Move both the opcodes related to it, and the internals code dealing with it. Signed-off-by: Jens Axboe <axboe@kernel.dk>
2022-06-13 07:07:23 -06:00
io_uring: kbuf: kill __io_kbuf_recycle() __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>
2022-06-22 13:55:51 +08:00
io_uring: split provided buffers handling into its own file Move both the opcodes related to it, and the internals code dealing with it. Signed-off-by: Jens Axboe <axboe@kernel.dk>
2022-06-13 07:07:23 -06:00
io_uring: don't inline io_put_kbuf 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>
2022-06-16 10:22:00 +01:00
io_uring: split provided buffers handling into its own file Move both the opcodes related to it, and the internals code dealing with it. Signed-off-by: Jens Axboe <axboe@kernel.dk>
2022-06-13 07:07:23 -06:00
io_uring: allow 0 length for buffer select If user gives 0 for length, we can set it from the available buffer size. Signed-off-by: Dylan Yudaken <dylany@fb.com> Link: https://lore.kernel.org/r/20220630091231.1456789-2-dylany@fb.com Signed-off-by: Jens Axboe <axboe@kernel.dk>
2022-06-30 02:12:20 -07:00
io_uring: split provided buffers handling into its own file Move both the opcodes related to it, and the internals code dealing with it. Signed-off-by: Jens Axboe <axboe@kernel.dk>
2022-06-13 07:07:23 -06:00
io_uring: allow 0 length for buffer select If user gives 0 for length, we can set it from the available buffer size. Signed-off-by: Dylan Yudaken <dylany@fb.com> Link: https://lore.kernel.org/r/20220630091231.1456789-2-dylany@fb.com Signed-off-by: Jens Axboe <axboe@kernel.dk>
2022-06-30 02:12:20 -07:00
io_uring: split provided buffers handling into its own file Move both the opcodes related to it, and the internals code dealing with it. Signed-off-by: Jens Axboe <axboe@kernel.dk>
2022-06-13 07:07:23 -06:00
io_uring: kbuf: add comments for some tricky code Add comments to explain why it is always under uring lock when incrementing head in __io_kbuf_recycle. And rectify one comemnt about kbuf consuming in iowq case. Signed-off-by: Hao Xu <howeyxu@tencent.com> Link: https://lore.kernel.org/r/20220617050429.94293-1-hao.xu@linux.dev Signed-off-by: Jens Axboe <axboe@kernel.dk>
2022-06-17 13:04:29 +08:00
io_uring: split provided buffers handling into its own file Move both the opcodes related to it, and the internals code dealing with it. Signed-off-by: Jens Axboe <axboe@kernel.dk>
2022-06-13 07:07:23 -06:00
io_uring: make io_kiocb_to_cmd() typesafe We need to make sure (at build time) that struct io_cmd_data is not casted to a structure that's larger. Signed-off-by: Stefan Metzmacher <metze@samba.org> Link: https://lore.kernel.org/r/c024cdf25ae19fc0319d4180e2298bade8ed17b8.1660201408.git.metze@samba.org Signed-off-by: Jens Axboe <axboe@kernel.dk>
2022-08-11 09:11:15 +02:00
io_uring: split provided buffers handling into its own file Move both the opcodes related to it, and the internals code dealing with it. Signed-off-by: Jens Axboe <axboe@kernel.dk>
2022-06-13 07:07:23 -06:00
io_uring: make io_kiocb_to_cmd() typesafe We need to make sure (at build time) that struct io_cmd_data is not casted to a structure that's larger. Signed-off-by: Stefan Metzmacher <metze@samba.org> Link: https://lore.kernel.org/r/c024cdf25ae19fc0319d4180e2298bade8ed17b8.1660201408.git.metze@samba.org Signed-off-by: Jens Axboe <axboe@kernel.dk>
2022-08-11 09:11:15 +02:00
io_uring: split provided buffers handling into its own file Move both the opcodes related to it, and the internals code dealing with it. Signed-off-by: Jens Axboe <axboe@kernel.dk>
2022-06-13 07:07:23 -06:00
io_uring: make io_kiocb_to_cmd() typesafe We need to make sure (at build time) that struct io_cmd_data is not casted to a structure that's larger. Signed-off-by: Stefan Metzmacher <metze@samba.org> Link: https://lore.kernel.org/r/c024cdf25ae19fc0319d4180e2298bade8ed17b8.1660201408.git.metze@samba.org Signed-off-by: Jens Axboe <axboe@kernel.dk>
2022-08-11 09:11:15 +02:00
io_uring: split provided buffers handling into its own file Move both the opcodes related to it, and the internals code dealing with it. Signed-off-by: Jens Axboe <axboe@kernel.dk>
2022-06-13 07:07:23 -06:00
io_uring: check for rollover of buffer ID when providing buffers We already check if the chosen starting offset for the buffer IDs fit within an unsigned short, as 65535 is the maximum value for a provided buffer. But if the caller asks to add N buffers at offset M, and M + N would exceed the size of the unsigned short, we simply add buffers with wrapping around the ID. This is not necessarily a bug and could in fact be a valid use case, but it seems confusing and inconsistent with the initial check for starting offset. Let's check for wrap consistently, and error the addition if we do need to wrap. Reported-by: Olivier Langlois <olivier@trillion01.com> Link: https://github.com/axboe/liburing/issues/726 Cc: stable@vger.kernel.org Signed-off-by: Jens Axboe <axboe@kernel.dk>
2022-11-10 10:50:55 -07:00
io_uring: split provided buffers handling into its own file Move both the opcodes related to it, and the internals code dealing with it. Signed-off-by: Jens Axboe <axboe@kernel.dk>
2022-06-13 07:07:23 -06:00
io_uring: make io_kiocb_to_cmd() typesafe We need to make sure (at build time) that struct io_cmd_data is not casted to a structure that's larger. Signed-off-by: Stefan Metzmacher <metze@samba.org> Link: https://lore.kernel.org/r/c024cdf25ae19fc0319d4180e2298bade8ed17b8.1660201408.git.metze@samba.org Signed-off-by: Jens Axboe <axboe@kernel.dk>
2022-08-11 09:11:15 +02:00
io_uring: split provided buffers handling into its own file Move both the opcodes related to it, and the internals code dealing with it. Signed-off-by: Jens Axboe <axboe@kernel.dk>
2022-06-13 07:07:23 -06:00
io_uring: mem-account pbuf buckets Potentially, someone may create as many pbuf bucket as there are indexes in an xarray without any other restrictions bounding our memory usage, put memory needed for the buckets under memory accounting. Cc: <stable@vger.kernel.org> Signed-off-by: Pavel Begunkov <asml.silence@gmail.com> Link: https://lore.kernel.org/r/d34c452e45793e978d26e2606211ec9070d329ea.1659622312.git.asml.silence@gmail.com Signed-off-by: Jens Axboe <axboe@kernel.dk>
2022-08-04 15:13:46 +01:00
io_uring: split provided buffers handling into its own file Move both the opcodes related to it, and the internals code dealing with it. Signed-off-by: Jens Axboe <axboe@kernel.dk>
2022-06-13 07:07:23 -06:00