kernel/linux.git/io_uring/opdef.c, branch v6.1.168

io_uring: get rid of double locking

2023-08-30T14:11:04+00:00

Commit 11373026f2960390d5e330df4e92735c4265c440 upstream. We don't need to take both uring_locks at once, msg_ring can be split in two parts, first getting a file from the filetable of the first ring and then installing it into the second one. Signed-off-by: Pavel Begunkov Link: https://lore.kernel.org/r/a80ecc2bc99c3b3f2cf20015d618b7c51419a797.1670384893.git.asml.silence@gmail.com Signed-off-by: Jens Axboe Signed-off-by: Greg Kroah-Hartman

io_uring: dont remove file from msg_ring reqs

2022-12-31T12:33:12+00:00

commit ef0ec1ad03119b8b46b035dad42bca7d6da7c2e5 upstream. We should not be messing with req->file outside of core paths. Clearing it makes msg_ring non reentrant, i.e. luckily io_msg_send_fd() fails the request on failed io_double_lock_ctx() but clearly was originally intended to do retries instead. Cc: stable@vger.kernel.org Signed-off-by: Pavel Begunkov Link: https://lore.kernel.org/r/e5ac9edadb574fe33f6d727cb8f14ce68262a684.1670384893.git.asml.silence@gmail.com Signed-off-by: Jens Axboe Signed-off-by: Greg Kroah-Hartman

io_uring/opdef: remove 'audit_skip' from SENDMSG_ZC

2022-10-12T22:30:56+00:00

The msg variants of sending aren't audited separately, so we should not be setting audit_skip for the zerocopy sendmsg variant either. Fixes: 493108d95f14 ("io_uring/net: zerocopy sendmsg") Reported-by: Paul Moore Reviewed-by: Paul Moore Signed-off-by: Jens Axboe

io_uring/net: zerocopy sendmsg

2022-09-21T19:15:02+00:00

Add a zerocopy version of sendmsg. Signed-off-by: Pavel Begunkov Link: https://lore.kernel.org/r/6aabc4bdfc0ec78df6ec9328137e394af9d4e7ef.1663668091.git.asml.silence@gmail.com Signed-off-by: Jens Axboe

io_uring/net: combine fail handlers

2022-09-21T19:15:02+00:00

Merge io_send_zc_fail() into io_sendrecv_fail(), saves a few lines of code and some headache for following patch. Signed-off-by: Pavel Begunkov Link: https://lore.kernel.org/r/e0eba1d577413aef5602cd45f588b9230207082d.1663668091.git.asml.silence@gmail.com Signed-off-by: Jens Axboe

io_uring/net: rename io_sendzc()

2022-09-21T19:15:02+00:00

Simple renaming of io_sendzc*() functions in preparatio to adding a zerocopy sendmsg variant. Signed-off-by: Pavel Begunkov Link: https://lore.kernel.org/r/265af46829e6076dd220011b1858dc3151969226.1663668091.git.asml.silence@gmail.com Signed-off-by: Jens Axboe

io_uring/net: support non-zerocopy sendto

2022-09-21T19:15:02+00:00

We have normal sends, but what is missing is sendto-like requests. Add sendto() capabilities to IORING_OP_SEND by passing in addr just as we do for IORING_OP_SEND_ZC. Signed-off-by: Pavel Begunkov Link: https://lore.kernel.org/r/69fbd8b2cb830e57d1bf9ec351e9bf95c5b77e3f.1663668091.git.asml.silence@gmail.com Signed-off-by: Jens Axboe

io_uring/net: don't lose partial send_zc on fail

2022-09-21T19:15:02+00:00

Partial zc send may end up in io_req_complete_failed(), which not only would return invalid result but also mask out the notification leading to lifetime issues. Cc: stable@vger.kernel.org Signed-off-by: Pavel Begunkov Link: https://lore.kernel.org/r/5673285b5e83e6ceca323727b4ddaa584b5cc91e.1663668091.git.asml.silence@gmail.com Signed-off-by: Jens Axboe

io_uring/net: don't lose partial send/recv on fail

2022-09-21T19:15:02+00:00

Just as with rw, partial send/recv may end up in io_req_complete_failed() and loose the result, make sure we return the number of bytes processed. Cc: stable@vger.kernel.org Signed-off-by: Pavel Begunkov Link: https://lore.kernel.org/r/a4ff95897b5419356fca9ea55db91ac15b2975f9.1663668091.git.asml.silence@gmail.com Signed-off-by: Jens Axboe

io_uring/rw: don't lose partial IO result on fail

2022-09-21T19:15:02+00:00

A partially done read/write may end up in io_req_complete_failed() and loose the result, make sure we return the number of bytes processed. Cc: stable@vger.kernel.org Signed-off-by: Pavel Begunkov Link: https://lore.kernel.org/r/05e0879c226bcd53b441bf92868eadd4bf04e2fc.1663668091.git.asml.silence@gmail.com Signed-off-by: Jens Axboe