From: Jens Axboe <axboe@kernel.dk>
Date: Sat, 20 Feb 2021 18:55:28 +0000 (-0700)
Subject: io_uring: flag new native workers with IORING_FEAT_NATIVE_WORKERS
X-Git-Tag: accepted/tizen/unified/20230118.172025~7709^2~11
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=1c0aa1fae1acb77c5f9917adb0e4cb4500b9f3a6;p=platform%2Fkernel%2Flinux-rpi.git

io_uring: flag new native workers with IORING_FEAT_NATIVE_WORKERS

A few reasons to do this:

- The naming of the manager and worker have changed. That's a user visible
  change, so makes sense to flag it.

- Opening certain files that use ->signal (like /proc/self or /dev/tty)
  now works, and the flag tells the application upfront that this is the
  case.

- Related to the above, using signalfd will now work as well.

Signed-off-by: Jens Axboe <axboe@kernel.dk>
---

diff --git a/fs/io_uring.c b/fs/io_uring.c
index 378cf79..cf9a5fa 100644
--- a/fs/io_uring.c
+++ b/fs/io_uring.c
@@ -9467,7 +9467,7 @@ static int io_uring_create(unsigned entries, struct io_uring_params *p,
 			IORING_FEAT_SUBMIT_STABLE | IORING_FEAT_RW_CUR_POS |
 			IORING_FEAT_CUR_PERSONALITY | IORING_FEAT_FAST_POLL |
 			IORING_FEAT_POLL_32BITS | IORING_FEAT_SQPOLL_NONFIXED |
-			IORING_FEAT_EXT_ARG;
+			IORING_FEAT_EXT_ARG | IORING_FEAT_NATIVE_WORKERS;
 
 	if (copy_to_user(params, p, sizeof(*p))) {
 		ret = -EFAULT;
diff --git a/include/uapi/linux/io_uring.h b/include/uapi/linux/io_uring.h
index ac4e173..2514eb6 100644
--- a/include/uapi/linux/io_uring.h
+++ b/include/uapi/linux/io_uring.h
@@ -262,6 +262,7 @@ struct io_uring_params {
 #define IORING_FEAT_POLL_32BITS 	(1U << 6)
 #define IORING_FEAT_SQPOLL_NONFIXED	(1U << 7)
 #define IORING_FEAT_EXT_ARG		(1U << 8)
+#define IORING_FEAT_NATIVE_WORKERS	(1U << 9)
 
 /*
  * io_uring_register(2) opcodes and arguments