Merge tag 'for-6.1/io_uring-2022-10-03' of git://git.kernel.dk/linux

Pull io_uring updates from Jens Axboe:

 - Add supported for more directly managed task_work running.

   This is beneficial for real world applications that end up issuing
   lots of system calls as part of handling work. Normal task_work will
   always execute as we transition in and out of the kernel, even for
   "unrelated" system calls. It's more efficient to defer the handling
   of io_uring's deferred work until the application wants it to be run,
   generally in batches.

   As part of ongoing work to write an io_uring network backend for
   Thrift, this has been shown to greatly improve performance. (Dylan)

 - Add IOPOLL support for passthrough (Kanchan)

 - Improvements and fixes to the send zero-copy support (Pavel)

 - Partial IO handling fixes (Pavel)

 - CQE ordering fixes around CQ ring overflow (Pavel)

 - Support sendto() for non-zc as well (Pavel)

 - Support sendmsg for zerocopy (Pavel)

 - Networking iov_iter fix (Stefan)

 - Misc fixes and cleanups (Pavel, me)

* tag 'for-6.1/io_uring-2022-10-03' of git://git.kernel.dk/linux: (56 commits)
  io_uring/net: fix notif cqe reordering
  io_uring/net: don't update msg_name if not provided
  io_uring: don't gate task_work run on TIF_NOTIFY_SIGNAL
  io_uring/rw: defer fsnotify calls to task context
  io_uring/net: fix fast_iov assignment in io_setup_async_msg()
  io_uring/net: fix non-zc send with address
  io_uring/net: don't skip notifs for failed requests
  io_uring/rw: don't lose short results on io_setup_async_rw()
  io_uring/rw: fix unexpected link breakage
  io_uring/net: fix cleanup double free free_iov init
  io_uring: fix CQE reordering
  io_uring/net: fix UAF in io_sendrecv_fail()
  selftest/net: adjust io_uring sendzc notif handling
  io_uring: ensure local task_work marks task as running
  io_uring/net: zerocopy sendmsg
  io_uring/net: combine fail handlers
  io_uring/net: rename io_sendzc()
  io_uring/net: support non-zerocopy sendto
  io_uring/net: refactor io_setup_async_addr
  io_uring/net: don't lose partial send_zc on fail
  ...

1 files changed, 3 insertions, 10 deletions

diff --git a/io_uring/timeout.c b/io_uring/timeout.c
index 78ea2c64b70e..e8a8c2099480 100644
--- a/io_uring/timeout.c
+++ b/io_uring/timeout.c
@@ -149,11 +149,10 @@ static inline void io_remove_next_linked(struct io_kiocb *req)
 	nxt->link = NULL;
 }
 
-bool io_disarm_next(struct io_kiocb *req)
+void io_disarm_next(struct io_kiocb *req)
 	__must_hold(&req->ctx->completion_lock)
 {
 	struct io_kiocb *link = NULL;
-	bool posted = false;
 
 	if (req->flags & REQ_F_ARM_LTIMEOUT) {
 		link = req->link;
@@ -161,7 +160,6 @@ bool io_disarm_next(struct io_kiocb *req)
 		if (link && link->opcode == IORING_OP_LINK_TIMEOUT) {
 			io_remove_next_linked(req);
 			io_req_tw_post_queue(link, -ECANCELED, 0);
-			posted = true;
 		}
 	} else if (req->flags & REQ_F_LINK_TIMEOUT) {
 		struct io_ring_ctx *ctx = req->ctx;
@@ -169,17 +167,12 @@ bool io_disarm_next(struct io_kiocb *req)
 		spin_lock_irq(&ctx->timeout_lock);
 		link = io_disarm_linked_timeout(req);
 		spin_unlock_irq(&ctx->timeout_lock);
-		if (link) {
-			posted = true;
+		if (link)
 			io_req_tw_post_queue(link, -ECANCELED, 0);
-		}
 	}
 	if (unlikely((req->flags & REQ_F_FAIL) &&
-		     !(req->flags & REQ_F_HARDLINK))) {
-		posted |= (req->link != NULL);
+		     !(req->flags & REQ_F_HARDLINK)))
 		io_fail_links(req);
-	}
-	return posted;
 }
 
 struct io_kiocb *__io_disarm_linked_timeout(struct io_kiocb *req,