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mirror-linux/io_uring
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Pavel Begunkov 9e4ed359b8 io_uring/netcmd: add tx timestamping cmd support 
Add a new socket command which returns tx time stamps to the user. It
provide an alternative to the existing error queue recvmsg interface.
The command works in a polled multishot mode, which means io_uring will
poll the socket and keep posting timestamps until the request is
cancelled or fails in any other way (e.g. with no space in the CQ). It
reuses the net infra and grabs timestamps from the socket's error queue.

The command requires IORING_SETUP_CQE32. All non-final CQEs (marked with
IORING_CQE_F_MORE) have cqe->res set to the tskey, and the upper 16 bits
of cqe->flags keep tstype (i.e. offset by IORING_CQE_BUFFER_SHIFT). The
timevalue is store in the upper part of the extended CQE. The final
completion won't have IORING_CQE_F_MORE and will have cqe->res storing
0/error.

Suggested-by: Vadim Fedorenko <vadim.fedorenko@linux.dev>
Acked-by: Willem de Bruijn <willemb@google.com>
Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
Link: https://lore.kernel.org/r/92ee66e6b33b8de062a977843d825f58f21ecd37.1750065793.git.asml.silence@gmail.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
 		2025-06-23 09:00:12 -06:00
..
Kconfig io_uring: make zcrx depend on CONFIG_IO_URING 2025-03-31 07:07:44 -06:00
Makefile io_uring/fdinfo: only compile if CONFIG_PROC_FS is set 2025-05-16 12:33:02 -06:00
advise.c io_uring: finish IOU_OK -> IOU_COMPLETE transition 2025-05-21 08:41:16 -06:00
advise.h
…
alloc_cache.c io_uring: add alloc_cache.c 2025-01-28 15:10:40 -07:00
alloc_cache.h io_uring/net: convert to struct iou_vec 2025-03-07 13:41:08 -07:00
cancel.c io_uring: finish IOU_OK -> IOU_COMPLETE transition 2025-05-21 08:41:16 -06:00
cancel.h io_uring/cancel: add generic cancel helper 2025-02-17 05:34:45 -07:00
cmd_net.c io_uring/netcmd: add tx timestamping cmd support 2025-06-23 09:00:12 -06:00
epoll.c io_uring: finish IOU_OK -> IOU_COMPLETE transition 2025-05-21 08:41:16 -06:00
epoll.h io_uring/epoll: add support for IORING_OP_EPOLL_WAIT 2025-02-20 07:59:56 -07:00
eventfd.c io_uring/eventfd: open code io_eventfd_grab() 2025-04-24 08:33:54 -06:00
eventfd.h io_uring/eventfd: dedup signalling helpers 2025-04-24 08:33:54 -06:00
fdinfo.c io_uring: fix use-after-free of sq->thread in __io_uring_show_fdinfo() 2025-06-10 11:20:04 -06:00
fdinfo.h
…
filetable.c io_uring: cache nodes and mapped buffers 2025-02-28 07:05:46 -07:00
filetable.h io_uring/rsrc: pass 'struct io_ring_ctx' reference to rsrc helpers 2024-11-07 15:24:33 -07:00
fs.c io_uring: finish IOU_OK -> IOU_COMPLETE transition 2025-05-21 08:41:16 -06:00
fs.h
…
futex.c io_uring/futex: mark wait requests as inflight 2025-06-04 10:50:14 -06:00
futex.h io_uring: move cancelations to be io_uring_task based 2024-11-06 13:55:38 -07:00
io-wq.c io_uring: fix task leak issue in io_wq_create() 2025-06-15 12:58:39 -06:00
io-wq.h io_uring/wq: avoid indirect do_work/free_work calls 2025-04-21 05:06:58 -06:00
io_uring.c io_uring: add mshot helper for posting CQE32 2025-06-23 09:00:12 -06:00
io_uring.h io_uring: add mshot helper for posting CQE32 2025-06-23 09:00:12 -06:00
kbuf.c io_uring/kbuf: don't truncate end buffer for multiple buffer peeks 2025-06-13 11:01:49 -06:00
kbuf.h io_uring/kbuf: limit legacy provided buffer lists to USHRT_MAX 2025-06-03 15:32:44 -06:00
memmap.c Merge branch 'io_uring-6.15' into for-6.16/io_uring 2025-05-16 12:31:19 -06:00
memmap.h io_uring: update parameter name in io_pin_pages function declaration 2025-05-09 07:58:22 -06:00
msg_ring.c io_uring: finish IOU_OK -> IOU_COMPLETE transition 2025-05-21 08:41:16 -06:00
msg_ring.h io_uring/msg_ring: Drop custom destructor 2024-12-27 10:08:21 -07:00
napi.c net: use napi_id_valid helper 2025-02-17 16:43:04 -08:00
napi.h io_uring/napi: add static napi tracking strategy 2024-11-06 13:55:38 -07:00
net.c io_uring/net: always use current transfer count for buffer put 2025-06-20 08:33:45 -06:00
net.h io_uring/net: convert to struct iou_vec 2025-03-07 13:41:08 -07:00
nop.c io_uring/nop: add IORING_NOP_TW completion flag 2025-06-23 08:59:13 -06:00
nop.h
…
notif.c io_uring: remove io_preinit_req() 2025-05-06 10:11:23 -06:00
notif.h io_uring/notif: implement notification stacking 2024-04-22 19:31:18 -06:00
opdef.c io_uring/uring_cmd: implement ->sqe_copy() to avoid unnecessary copies 2025-06-23 08:59:13 -06:00
opdef.h io_uring: add struct io_cold_def->sqe_copy() method 2025-06-23 08:59:13 -06:00
openclose.c io_uring: finish IOU_OK -> IOU_COMPLETE transition 2025-05-21 08:41:16 -06:00
openclose.h io_uring: add support for IORING_OP_PIPE 2025-04-21 05:06:58 -06:00
poll.c io_uring/poll: introduce io_arm_apoll() 2025-06-23 09:00:12 -06:00
poll.h io_uring/poll: introduce io_arm_apoll() 2025-06-23 09:00:12 -06:00
refs.h io_uring: always do atomic put from iowq 2025-04-03 08:31:57 -06:00
register.c io_uring: consistently use rcu semantics with sqpoll thread 2025-06-12 08:17:09 -06:00
register.h io_uring: temporarily disable registered waits 2024-11-15 09:58:34 -07:00
rsrc.c io_uring: fix potential page leak in io_sqe_buffer_register() 2025-06-18 05:09:46 -06:00
rsrc.h io_uring: move io_req_put_rsrc_nodes() 2025-05-06 10:11:23 -06:00
rw.c for-6.16/io_uring-20250523 2025-05-26 12:13:22 -07:00
rw.h io_uring/kbuf: pass bgid to io_buffer_select() 2025-04-21 05:06:58 -06:00
slist.h io_uring: silence variable ‘prev’ set but not used warning 2023-03-09 10:10:58 -07:00
splice.c io_uring: finish IOU_OK -> IOU_COMPLETE transition 2025-05-21 08:41:16 -06:00
splice.h io_uring/splice: open code 2nd direct file assignment 2024-10-29 13:43:28 -06:00
sqpoll.c io_uring/sqpoll: don't put task_struct on tctx setup failure 2025-06-17 06:43:18 -06:00
sqpoll.h io_uring: consistently use rcu semantics with sqpoll thread 2025-06-12 08:17:09 -06:00
statx.c io_uring: finish IOU_OK -> IOU_COMPLETE transition 2025-05-21 08:41:16 -06:00
statx.h
…
sync.c io_uring: finish IOU_OK -> IOU_COMPLETE transition 2025-05-21 08:41:16 -06:00
sync.h
…
tctx.c io_uring/wq: avoid indirect do_work/free_work calls 2025-04-21 05:06:58 -06:00
tctx.h io_uring: simplify __io_uring_add_tctx_node 2022-10-07 12:25:30 -06:00
timeout.c io_uring: finish IOU_OK -> IOU_COMPLETE transition 2025-05-21 08:41:16 -06:00
timeout.h io_uring/timeout: don't export link t-out disarm helper 2025-05-06 10:11:23 -06:00
truncate.c io_uring: finish IOU_OK -> IOU_COMPLETE transition 2025-05-21 08:41:16 -06:00
truncate.h io_uring: add support for ftruncate 2024-02-09 09:04:39 -07:00
uring_cmd.c io_uring: add mshot helper for posting CQE32 2025-06-23 09:00:12 -06:00
uring_cmd.h io_uring: add mshot helper for posting CQE32 2025-06-23 09:00:12 -06:00
waitid.c io_uring: finish IOU_OK -> IOU_COMPLETE transition 2025-05-21 08:41:16 -06:00
waitid.h io_uring: move cancelations to be io_uring_task based 2024-11-06 13:55:38 -07:00
xattr.c io_uring: finish IOU_OK -> IOU_COMPLETE transition 2025-05-21 08:41:16 -06:00
xattr.h
…
zcrx.c io_uring-6.16-20250606 2025-06-06 13:09:03 -07:00
zcrx.h io_uring/zcrx: dmabuf backed zerocopy receive 2025-05-06 10:11:00 -06:00