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b48c312be0
android_kernel_samsung_sm8650/io_uring
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Pavel Begunkov b48c312be0 io_uring/net: simplify zerocopy send user API 
Following user feedback, this patch simplifies zerocopy send API. One of
the main complaints is that the current API is difficult with the
userspace managing notification slots, and then send retries with error
handling make it even worse.

Instead of keeping notification slots change it to the per-request
notifications model, which posts both completion and notification CQEs
for each request when any data has been sent, and only one CQE if it
fails. All notification CQEs will have IORING_CQE_F_NOTIF set and
IORING_CQE_F_MORE in completion CQEs indicates whether to wait a
notification or not.

IOSQE_CQE_SKIP_SUCCESS is disallowed with zerocopy sends for now.

This is less flexible, but greatly simplifies the user API and also the
kernel implementation. We reuse notif helpers in this patch, but in the
future there won't be need for keeping two requests.

Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
Link: https://lore.kernel.org/r/95287640ab98fc9417370afb16e310677c63e6ce.1662027856.git.asml.silence@gmail.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
2022-09-01 09:13:33 -06:00
..
advise.c io_uring: make io_kiocb_to_cmd() typesafe 2022-08-12 17:01:00 -06:00
advise.h io_uring: split out fadvise/madvise operations 2022-07-24 18:39:11 -06:00
alloc_cache.h io_uring: impose max limit on apoll cache 2022-07-24 18:39:17 -06:00
cancel.c io_uring: fix off-by-one in sync cancelation file check 2022-08-23 07:26:08 -06:00
cancel.h io_uring: add sync cancelation API through io_uring_register() 2022-07-24 18:39:15 -06:00
epoll.c io_uring: make io_kiocb_to_cmd() typesafe 2022-08-12 17:01:00 -06:00
epoll.h io_uring: move epoll handler to its own file 2022-07-24 18:39:11 -06:00
fdinfo.c io_uring: move a few private types to local headers 2022-07-24 18:39:14 -06:00
fdinfo.h io_uring: move fdinfo helpers to its own file 2022-07-24 18:39:12 -06:00
filetable.c io_uring: let to set a range for file slot allocation 2022-07-24 18:39:16 -06:00
filetable.h io_uring: let to set a range for file slot allocation 2022-07-24 18:39:16 -06:00
fs.c io_uring: make io_kiocb_to_cmd() typesafe 2022-08-12 17:01:00 -06:00
fs.h io_uring: split out filesystem related operations 2022-07-24 18:39:11 -06:00
io_uring.c io_uring/net: simplify zerocopy send user API 2022-09-01 09:13:33 -06:00
io_uring.h io_uring: export req alloc from core 2022-07-27 08:50:50 -06:00
io-wq.c audit, io_uring, io-wq: Fix memory leak in io_sq_thread() and io_wqe_worker() 2022-08-04 08:33:54 -06:00
io-wq.h io_uring: move list helpers to a separate file 2022-07-24 18:39:15 -06:00
kbuf.c io_uring: make io_kiocb_to_cmd() typesafe 2022-08-12 17:01:00 -06:00
kbuf.h io_uring: restore bgid in io_put_kbuf 2022-07-24 18:39:16 -06:00
Makefile io_uring: add zc notification infrastructure 2022-07-24 18:41:06 -06:00
msg_ring.c io_uring: make io_kiocb_to_cmd() typesafe 2022-08-12 17:01:00 -06:00
msg_ring.h io_uring: move msg_ring into its own file 2022-07-24 18:39:12 -06:00
net.c io_uring/net: simplify zerocopy send user API 2022-09-01 09:13:33 -06:00
net.h io_uring/net: simplify zerocopy send user API 2022-09-01 09:13:33 -06:00
nop.c io_uring: kill extra io_uring_types.h includes 2022-07-24 18:39:14 -06:00
nop.h io_uring: move nop into its own file 2022-07-24 18:39:11 -06:00
notif.c io_uring/net: simplify zerocopy send user API 2022-09-01 09:13:33 -06:00
notif.h io_uring/net: simplify zerocopy send user API 2022-09-01 09:13:33 -06:00
opdef.c io_uring/net: simplify zerocopy send user API 2022-09-01 09:13:33 -06:00
opdef.h io_uring: conditional ->async_data allocation 2022-08-24 08:57:28 -06:00
openclose.c io_uring: make io_kiocb_to_cmd() typesafe 2022-08-12 17:01:00 -06:00
openclose.h io_uring: split out fixed file installation and removal 2022-07-24 18:39:16 -06:00
poll.c io_uring: make io_kiocb_to_cmd() typesafe 2022-08-12 17:01:00 -06:00
poll.h io_uring: add abstraction around apoll cache 2022-07-24 18:39:17 -06:00
refs.h io_uring: make io_uring_types.h public 2022-07-24 18:39:14 -06:00
rsrc.c Revert "io_uring: rename IORING_OP_FILES_UPDATE" 2022-09-01 09:13:33 -06:00
rsrc.h Revert "io_uring: rename IORING_OP_FILES_UPDATE" 2022-09-01 09:13:33 -06:00
rw.c io_uring-6.0-2022-08-13 2022-08-13 13:28:54 -07:00
rw.h io_uring: move read/write related opcodes to its own file 2022-07-24 18:39:12 -06:00
slist.h io_uring: move list helpers to a separate file 2022-07-24 18:39:15 -06:00
splice.c io_uring: make io_kiocb_to_cmd() typesafe 2022-08-12 17:01:00 -06:00
splice.h io_uring: split out splice related operations 2022-07-24 18:39:11 -06:00
sqpoll.c audit, io_uring, io-wq: Fix memory leak in io_sq_thread() and io_wqe_worker() 2022-08-04 08:33:54 -06:00
sqpoll.h io_uring: move SQPOLL related handling into its own file 2022-07-24 18:39:12 -06:00
statx.c io_uring: make io_kiocb_to_cmd() typesafe 2022-08-12 17:01:00 -06:00
statx.h io_uring: move statx handling to its own file 2022-07-24 18:39:11 -06:00
sync.c io_uring: make io_kiocb_to_cmd() typesafe 2022-08-12 17:01:00 -06:00
sync.h io_uring: split out fs related sync/fallocate functions 2022-07-24 18:39:11 -06:00
tctx.c io_uring: lockless task list 2022-07-24 18:39:15 -06:00
tctx.h io_uring: export io_put_task() 2022-07-24 18:41:06 -06:00
timeout.c io_uring: make io_kiocb_to_cmd() typesafe 2022-08-12 17:01:00 -06:00
timeout.h io_uring: move a few private types to local headers 2022-07-24 18:39:14 -06:00
uring_cmd.c io_uring: fix submission-failure handling for uring-cmd 2022-08-23 09:46:17 -06:00
uring_cmd.h io_uring: move uring_cmd handling to its own file 2022-07-24 18:39:11 -06:00
xattr.c io_uring: make io_kiocb_to_cmd() typesafe 2022-08-12 17:01:00 -06:00
xattr.h io_uring: move xattr related opcodes to its own file 2022-07-24 18:39:11 -06:00