kernel/include/uapi/linux/io_uring.h, branch linux-6.11.y

io_uring: fix user_data field name in comment

2024-08-16T18:31:26Z

io_uring_cqe's user_data field refers to `sqe->data`, but io_uring_sqe does not have a data field. Fix the comment to say `sqe->user_data`. Signed-off-by: Caleb Sander Mateos Link: https://github.com/axboe/liburing/pull/1206 Link: https://lore.kernel.org/r/20240816181526.3642732-1-csander@purestorage.com Signed-off-by: Jens Axboe

io_uring: Introduce IORING_OP_LISTEN

2024-06-19T13:57:21Z

IORING_OP_LISTEN provides the semantic of listen(2) via io_uring. While this is an essentially synchronous system call, the main point is to enable a network path to execute fully with io_uring registered and descriptorless files. Signed-off-by: Gabriel Krisman Bertazi Link: https://lore.kernel.org/r/20240614163047.31581-4-krisman@suse.de Signed-off-by: Jens Axboe

io_uring: Introduce IORING_OP_BIND

2024-06-19T13:57:21Z

IORING_OP_BIND provides the semantic of bind(2) via io_uring. While this is an essentially synchronous system call, the main point is to enable a network path to execute fully with io_uring registered and descriptorless files. Signed-off-by: Gabriel Krisman Bertazi Link: https://lore.kernel.org/r/20240614163047.31581-3-krisman@suse.de Signed-off-by: Jens Axboe

io_uring: support to inject result for NOP

2024-05-10T12:09:45Z

Support to inject result for NOP so that we can inject failure from userspace. It is very helpful for covering failure handling code in io_uring core change. With nop flags, it becomes possible to add more test features on NOP in future. Suggested-by: Jens Axboe Signed-off-by: Ming Lei Link: https://lore.kernel.org/r/20240510035031.78874-3-ming.lei@redhat.com Signed-off-by: Jens Axboe

io_uring/net: add IORING_ACCEPT_POLL_FIRST flag

2024-05-09T18:22:11Z

Similarly to how polling first is supported for receive, it makes sense to provide the same for accept. An accept operation does a lot of expensive setup, like allocating an fd, a socket/inode, etc. If no connection request is already pending, this is wasted and will just be cleaned up and freed, only to retry via the usual poll trigger. Add IORING_ACCEPT_POLL_FIRST, which tells accept to only initiate the accept request if poll says we have something to accept. Signed-off-by: Jens Axboe

io_uring/net: add IORING_ACCEPT_DONTWAIT flag

2024-05-09T18:22:03Z

This allows the caller to perform a non-blocking attempt, similarly to how recvmsg has MSG_DONTWAIT. If set, and we get -EAGAIN on a connection attempt, propagate the result to userspace rather than arm poll and wait for a retry. Suggested-by: Norman Maurer Signed-off-by: Jens Axboe

io_uring/net: support bundles for recv

2024-04-22T17:26:11Z

If IORING_OP_RECV is used with provided buffers, the caller may also set IORING_RECVSEND_BUNDLE to turn it into a multi-buffer recv. This grabs buffers available and receives into them, posting a single completion for all of it. This can be used with multishot receive as well, or without it. Now that both send and receive support bundles, add a feature flag for it as well. If IORING_FEAT_RECVSEND_BUNDLE is set after registering the ring, then the kernel supports bundles for recv and send. Signed-off-by: Jens Axboe

io_uring/net: support bundles for send

2024-04-22T17:26:05Z

If IORING_OP_SEND is used with provided buffers, the caller may also set IORING_RECVSEND_BUNDLE to turn it into a multi-buffer send. The idea is that an application can fill outgoing buffers in a provided buffer group, and then arm a single send that will service them all. Once there are no more buffers to send, or if the requested length has been sent, the request posts a single completion for all the buffers. This only enables it for IORING_OP_SEND, IORING_OP_SENDMSG is coming in a separate patch. However, this patch does do a lot of the prep work that makes wiring up the sendmsg variant pretty trivial. They share the prep side. Signed-off-by: Jens Axboe

io_uring: Avoid anonymous enums in io_uring uapi

2024-04-15T14:10:26Z

While valid C, anonymous enums confuse Cython (Python to C translator), as reported by Ritesh (YoSTEALTH) [1] . Since people rely on it when building against liburing and we want to keep this header in sync with the library version, let's name the existing enums in the uapi header. [1] https://github.com/cython/cython/issues/3240 Signed-off-by: Gabriel Krisman Bertazi Link: https://lore.kernel.org/r/20240328210935.25640-1-krisman@suse.de Signed-off-by: Jens Axboe

io_uring: add register/unregister napi function

2024-02-09T18:54:32Z

This adds an api to register and unregister the napi for io-uring. If the arg value is specified when unregistering, the current napi setting for the busy poll timeout is copied into the user structure. If this is not required, NULL can be passed as the arg value. Signed-off-by: Stefan Roesch Acked-by: Jakub Kicinski Link: https://lore.kernel.org/r/20230608163839.2891748-7-shr@devkernel.io Signed-off-by: Jens Axboe