user/sven/linux.git/include/linux/io_uring.h, branch v6.7.9

io_uring/cmd: Pass compat mode in issue_flags

2023-10-19T22:42:03Z

Create a new flag to track if the operation is running compat mode. This basically check the context->compat and pass it to the issue_flags, so, it could be queried later in the callbacks. Signed-off-by: Breno Leitao Reviewed-by: Gabriel Krisman Bertazi Link: https://lore.kernel.org/r/20231016134750.1381153-6-leitao@debian.org Signed-off-by: Jens Axboe

io_uring: cancelable uring_cmd

2023-09-28T13:36:00Z

uring_cmd may never complete, such as ublk, in which uring cmd isn't completed until one new block request is coming from ublk block device. Add cancelable uring_cmd to provide mechanism to driver for cancelling pending commands in its own way. Add API of io_uring_cmd_mark_cancelable() for driver to mark one command as cancelable, then io_uring will cancel this command in io_uring_cancel_generic(). ->uring_cmd() callback is reused for canceling command in driver's way, then driver gets notified with the cancelling from io_uring. Add API of io_uring_cmd_get_task() to help driver cancel handler deal with the canceling. Reviewed-by: Gabriel Krisman Bertazi Suggested-by: Jens Axboe Signed-off-by: Ming Lei Signed-off-by: Jens Axboe

io_uring: retain top 8bits of uring_cmd flags for kernel internal use

2023-09-28T13:31:41Z

Retain top 8bits of uring_cmd flags for kernel internal use, so that we can move IORING_URING_CMD_POLLED out of uapi header. Reviewed-by: Gabriel Krisman Bertazi Reviewed-by: Anuj Gupta Signed-off-by: Ming Lei Signed-off-by: Jens Axboe

io_uring: Add io_uring command support for sockets

2023-08-09T16:46:15Z

Enable io_uring commands on network sockets. Create two new SOCKET_URING_OP commands that will operate on sockets. In order to call ioctl on sockets, use the file_operations->io_uring_cmd callbacks, and map it to a uring socket function, which handles the SOCKET_URING_OP accordingly, and calls socket ioctls. This patches was tested by creating a new test case in liburing. Link: https://github.com/leitao/liburing/tree/io_uring_cmd Signed-off-by: Breno Leitao Acked-by: Jakub Kicinski Link: https://lore.kernel.org/r/20230627134424.2784797-1-leitao@debian.org Signed-off-by: Jens Axboe

io_uring/cmd: add cmd lazy tw wake helper

2023-05-25T14:54:06Z

We want to use IOU_F_TWQ_LAZY_WAKE in commands. First, introduce a new cmd tw helper accepting TWQ flags, and then add io_uring_cmd_do_in_task_laz() that will pass IOU_F_TWQ_LAZY_WAKE and imply the "lazy" semantics, i.e. it posts no more than 1 CQE and delaying execution of this tw should not prevent forward progress. Signed-off-by: Pavel Begunkov Link: https://lore.kernel.org/r/5b9f6716006df7e817f18bd555aee2f8f9c8b0c3.1684154817.git.asml.silence@gmail.com Signed-off-by: Jens Axboe

io_uring: make io_uring_sqe_cmd() unconditionally available

2023-05-09T13:59:54Z

If CONFIG_IO_URING isn't set, then io_uring_sqe_cmd() is not defined. As the nvme driver uses this helper, it causes a compilation issue: drivers/nvme/host/ioctl.c: In function 'nvme_uring_cmd_io': drivers/nvme/host/ioctl.c:555:44: error: implicit declaration of function 'io_uring_sqe_cmd'; did you mean 'io_uring_free'? [-Werror=implicit-function-declaration] 555 | const struct nvme_uring_cmd *cmd = io_uring_sqe_cmd(ioucmd->sqe); | ^~~~~~~~~~~~~~~~ | io_uring_free Fix it by just making io_uring_sqe_cmd() generally available - the types are known, and there's no reason to hide it under CONFIG_IO_URING. Fixes: fd9b8547bc5c ("io_uring: Pass whole sqe to commands") Reported-by: kernel test robot Reported-by: Chen-Yu Tsai Tested-by: Chen-Yu Tsai Signed-off-by: Jens Axboe

io_uring: Pass whole sqe to commands

2023-05-04T14:19:05Z

Currently uring CMD operation relies on having large SQEs, but future operations might want to use normal SQE. The io_uring_cmd currently only saves the payload (cmd) part of the SQE, but, for commands that use normal SQE size, it might be necessary to access the initial SQE fields outside of the payload/cmd block. So, saves the whole SQE other than just the pdu. This changes slightly how the io_uring_cmd works, since the cmd structures and callbacks are not opaque to io_uring anymore. I.e, the callbacks can look at the SQE entries, not only, in the cmd structure. The main advantage is that we don't need to create custom structures for simple commands. Creates io_uring_sqe_cmd() that returns the cmd private data as a null pointer and avoids casting in the callee side. Also, make most of ublk_drv's sqe->cmd priv structure into const, and use io_uring_sqe_cmd() to get the private structure, removing the unwanted cast. (There is one case where the cast is still needed since the header->{len,addr} is updated in the private structure) Suggested-by: Pavel Begunkov Signed-off-by: Breno Leitao Reviewed-by: Keith Busch Reviewed-by: Christoph Hellwig Reviewed-by: Pavel Begunkov Link: https://lore.kernel.org/r/20230504121856.904491-3-leitao@debian.org Signed-off-by: Jens Axboe

block/io_uring: pass in issue_flags for uring_cmd task_work handling

2023-03-21T02:01:25Z

io_uring_cmd_done() currently assumes that the uring_lock is held when invoked, and while it generally is, this is not guaranteed. Pass in the issue_flags associated with it, so that we have IO_URING_F_UNLOCKED available to be able to lock the CQ ring appropriately when completing events. Cc: stable@vger.kernel.org Fixes: ee692a21e9bf ("fs,io_uring: add infrastructure for uring-cmd") Signed-off-by: Jens Axboe

io_uring: complete all requests in task context

2022-12-07T13:47:13Z

This patch adds ctx->task_complete flag. If set, we'll complete all requests in the context of the original task. Note, this extends to completion CQE posting only but not io_kiocb cleanup / free, e.g. io-wq may free the requests in the free calllback. This flag will be used later for optimisations purposes. Signed-off-by: Pavel Begunkov Link: https://lore.kernel.org/r/21ece72953f76bb2e77659a72a14326227ab6460.1670384893.git.asml.silence@gmail.com Signed-off-by: Jens Axboe

io_uring: reshuffle issue_flags

2022-11-30T17:29:07Z

Reshuffle issue flags to keep normal flags separate from the uring_cmd ctx-setup like flags. Shift the second type to the second byte so it's easier to add new ones in the future. Signed-off-by: Pavel Begunkov Link: https://lore.kernel.org/r/d6e4696c883943082d248716f4cd568f37b17a74.1669821213.git.asml.silence@gmail.com Signed-off-by: Jens Axboe