Hi, We support multishot for other request types, generally in the shape of a flag for the request. Doing a flag based approach with reads isn't straightforward, as the read/write flags are in the RWF_ space. Instead, add a separate opcode for this, IORING_OP_READ_MULTISHOT. This can only be used provided buffers, like other multishot request types that read/receive data. It can also only be used for pollable file types, like a tun device or pipes, for example. File types that are always readable (or seekable), like regular files, cannot be used with multishot reads. This is based on the io_uring-futex branch (which, in turn, is based on the io_uring-waitid branch). No dependencies as such between them, except the opcode numbering. Can also be found here: https://git.kernel.dk/cgit/linux/log/?h=io_uring-mshot-read and there's a liburing branch with some basic support and some test cases here: https://git.kernel.dk/cgit/liburing/log/?h=read-mshot include/uapi/linux/io_uring.h | 1 + io_uring/opdef.c | 14 ++++++ io_uring/opdef.h | 2 + io_uring/rw.c | 92 ++++++++++++++++++++++++++++++++--- io_uring/rw.h | 2 + 5 files changed, 105 insertions(+), 6 deletions(-) Changes since v1: - Code reformatting - Add/expand a few comments -- Jens Axboe
