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d617b3147d
linux/io_uring
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Pavel Begunkov d617b3147d io_uring: restore back registered wait arguments 
Now we've got a more generic region registration API, place
IORING_ENTER_EXT_ARG_REG and re-enable it.

First, the user has to register a region with the
IORING_MEM_REGION_REG_WAIT_ARG flag set. It can only be done for a
ring in a disabled state, aka IORING_SETUP_R_DISABLED, to avoid races
with already running waiters. With that we should have stable constant
values for ctx->cq_wait_{size,arg} in io_get_ext_arg_reg() and hence no
READ_ONCE required.

The other API difference is that we're now passing byte offsets instead
of indexes. The user _must_ align all offsets / pointers to the native
word size, failing to do so might but not necessarily has to lead to a
failure usually returned as -EFAULT. liburing will be hiding this
details from users.

Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
Link: https://lore.kernel.org/r/81822c1b4ffbe8ad391b4f9ad1564def0d26d990.1731689588.git.asml.silence@gmail.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
2024-11-15 12:28:38 -07:00
..
advise.c io_uring/advise: support 64-bit lengths 2024-06-16 14:54:55 -06:00
advise.h
alloc_cache.h io_uring/alloc_cache: switch to array based caching 2024-04-15 08:10:25 -06:00
cancel.c io_uring: move struct io_kiocb from task_struct to io_uring_task 2024-11-06 13:55:38 -07:00
cancel.h io_uring/cancel: get rid of init_hash_table() helper 2024-10-29 13:43:27 -06:00
epoll.c io_uring: undeprecate epoll_ctl support 2023-05-26 20:22:41 -06:00
epoll.h
eventfd.c io_uring/eventfd: move ctx->evfd_last_cq_tail into io_ev_fd 2024-10-29 13:43:26 -06:00
eventfd.h io_uring/eventfd: move eventfd handling to separate file 2024-06-16 14:54:55 -06:00
fdinfo.c io_uring/napi: add static napi tracking strategy 2024-11-06 13:55:38 -07:00
fdinfo.h
filetable.c io_uring/rsrc: pass 'struct io_ring_ctx' reference to rsrc helpers 2024-11-07 15:24:33 -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/fs: consider link->flags when getting path for LINKAT 2023-11-20 09:01:42 -07:00
fs.h
futex.c io_uring: move cancelations to be io_uring_task based 2024-11-06 13:55:38 -07:00
futex.h io_uring: move cancelations to be io_uring_task based 2024-11-06 13:55:38 -07:00
io_uring.c io_uring: restore back registered wait arguments 2024-11-15 12:28:38 -07:00
io_uring.h io_uring: avoid normal tw intermediate fallback 2024-11-06 13:55:38 -07:00
io-wq.c io_uring/io-wq: inherit cpuset of cgroup in io worker 2024-09-11 07:27:56 -06:00
io-wq.h io_uring/io-wq: make io_wq_work flags atomic 2024-06-16 14:54:55 -06:00
kbuf.c for-6.12/io_uring-20240913 2024-09-16 13:29:00 +02:00
kbuf.h io_uring/kbuf: add support for incremental buffer consumption 2024-08-29 08:44:58 -06:00
Makefile io_uring: add GCOV_PROFILE_URING Kconfig option 2024-08-30 10:52:02 -06:00
memmap.c io_uring: introduce concept of memory regions 2024-11-15 09:58:34 -07:00
memmap.h io_uring: introduce concept of memory regions 2024-11-15 09:58:34 -07:00
msg_ring.c switch io_msg_ring() to CLASS(fd) 2024-11-15 09:55:54 -07:00
msg_ring.h io_uring/msg_ring: add support for sending a sync message 2024-10-29 13:43:26 -06:00
napi.c io_uring/napi: add static napi tracking strategy 2024-11-06 13:55:38 -07:00
napi.h io_uring/napi: add static napi tracking strategy 2024-11-06 13:55:38 -07:00
net.c io_uring/rsrc: add & apply io_req_assign_buf_node() 2024-11-07 15:24:33 -07:00
net.h io_uring: Introduce IORING_OP_LISTEN 2024-06-19 07:57:21 -06:00
nop.c io_uring/rsrc: add & apply io_req_assign_buf_node() 2024-11-07 15:24:33 -07:00
nop.h
notif.c io_uring: move struct io_kiocb from task_struct to io_uring_task 2024-11-06 13:55:38 -07:00
notif.h io_uring/notif: implement notification stacking 2024-04-22 19:31:18 -06:00
opdef.c io_uring/splice: open code 2nd direct file assignment 2024-10-29 13:43:28 -06:00
opdef.h io_uring: Fix probe of disabled operations 2024-06-19 08:58:00 -06:00
openclose.c io_uring: enable audit and restrict cred override for IORING_OP_FIXED_FD_INSTALL 2024-01-23 15:25:14 -07:00
openclose.h io_uring/openclose: add support for IORING_OP_FIXED_FD_INSTALL 2023-12-12 07:42:57 -07:00
poll.c io_uring: move struct io_kiocb from task_struct to io_uring_task 2024-11-06 13:55:38 -07:00
poll.h io_uring: move cancelations to be io_uring_task based 2024-11-06 13:55:38 -07:00
refs.h io_uring: kill dead code in io_req_complete_post 2024-04-15 08:10:26 -06:00
register.c io_uring: restore back registered wait arguments 2024-11-15 12:28:38 -07:00
register.h io_uring: temporarily disable registered waits 2024-11-15 09:58:34 -07:00
rsrc.c io_uring/rsrc: remove '->ctx_ptr' of 'struct io_rsrc_node' 2024-11-07 15:24:33 -07:00
rsrc.h io_uring/rsrc: add & apply io_req_assign_buf_node() 2024-11-07 15:24:33 -07:00
rw.c io_uring/rsrc: add & apply io_req_assign_buf_node() 2024-11-07 15:24:33 -07:00
rw.h io_uring/alloc_cache: switch to array based caching 2024-04-15 08:10:25 -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/rsrc: pass 'struct io_ring_ctx' reference to rsrc helpers 2024-11-07 15:24:33 -07:00
splice.h io_uring/splice: open code 2nd direct file assignment 2024-10-29 13:43:28 -06:00
sqpoll.c io_uring/sqpoll: wait on sqd->wait for thread parking 2024-10-29 13:43:27 -06:00
sqpoll.h io_uring/sqpoll: statistics of the true utilization of sq threads 2024-03-01 06:28:19 -07:00
statx.c vfs: retire user_path_at_empty and drop empty arg from getname_flags 2024-06-05 17:03:57 +02:00
statx.h
sync.c io_uring: for requests that require async, force it 2023-01-29 15:18:26 -07:00
sync.h
tctx.c io_uring: move struct io_kiocb from task_struct to io_uring_task 2024-11-06 13:55:38 -07:00
tctx.h io_uring: simplify __io_uring_add_tctx_node 2022-10-07 12:25:30 -06:00
timeout.c io_uring: move struct io_kiocb from task_struct to io_uring_task 2024-11-06 13:55:38 -07:00
timeout.h io_uring: move cancelations to be io_uring_task based 2024-11-06 13:55:38 -07:00
truncate.c io_uring: add support for ftruncate 2024-02-09 09:04:39 -07:00
truncate.h io_uring: add support for ftruncate 2024-02-09 09:04:39 -07:00
uring_cmd.c io_uring/uring_cmd: fix buffer index retrieval 2024-11-11 08:11:37 -07:00
uring_cmd.h io_uring: move cancelations to be io_uring_task based 2024-11-06 13:55:38 -07:00
waitid.c io_uring: move struct io_kiocb from task_struct to io_uring_task 2024-11-06 13:55:38 -07:00
waitid.h io_uring: move cancelations to be io_uring_task based 2024-11-06 13:55:38 -07:00
xattr.c vfs: retire user_path_at_empty and drop empty arg from getname_flags 2024-06-05 17:03:57 +02:00
xattr.h