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From: Stefano Garzarella <sgarzare@redhat.com>
To: Jens Axboe <axboe@kernel.dk>
Cc: io-uring@vger.kernel.org
Subject: [PATCH liburing 1/5] Add CQ ring 'flags' field
Date: Fri, 15 May 2020 18:43:27 +0200	[thread overview]
Message-ID: <20200515164331.236868-2-sgarzare@redhat.com> (raw)
In-Reply-To: <20200515164331.236868-1-sgarzare@redhat.com>

io_uring provides the new CQ ring 'flags' field if 'cq_off.flags'
is not zero. In this case we set the 'cq->kflags' pointer, otherwise
it will be NULL.

Signed-off-by: Stefano Garzarella <sgarzare@redhat.com>
---
 src/include/liburing.h          | 1 +
 src/include/liburing/io_uring.h | 4 +++-
 src/setup.c                     | 2 ++
 3 files changed, 6 insertions(+), 1 deletion(-)

diff --git a/src/include/liburing.h b/src/include/liburing.h
index dd85f7b..ea596f6 100644
--- a/src/include/liburing.h
+++ b/src/include/liburing.h
@@ -41,6 +41,7 @@ struct io_uring_cq {
 	unsigned *ktail;
 	unsigned *kring_mask;
 	unsigned *kring_entries;
+	unsigned *kflags;
 	unsigned *koverflow;
 	struct io_uring_cqe *cqes;
 
diff --git a/src/include/liburing/io_uring.h b/src/include/liburing/io_uring.h
index e48d746..602bb0e 100644
--- a/src/include/liburing/io_uring.h
+++ b/src/include/liburing/io_uring.h
@@ -204,7 +204,9 @@ struct io_cqring_offsets {
 	__u32 ring_entries;
 	__u32 overflow;
 	__u32 cqes;
-	__u64 resv[2];
+	__u32 flags;
+	__u32 resv1;
+	__u64 resv2;
 };
 
 /*
diff --git a/src/setup.c b/src/setup.c
index f783b6a..860c112 100644
--- a/src/setup.c
+++ b/src/setup.c
@@ -76,6 +76,8 @@ err:
 	cq->kring_entries = cq->ring_ptr + p->cq_off.ring_entries;
 	cq->koverflow = cq->ring_ptr + p->cq_off.overflow;
 	cq->cqes = cq->ring_ptr + p->cq_off.cqes;
+	if (p->cq_off.flags)
+		cq->kflags = cq->ring_ptr + p->cq_off.flags;
 	return 0;
 }
 
-- 
2.25.4


  reply	other threads:[~2020-05-15 16:43 UTC|newest]

Thread overview: 12+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-05-15 16:43 [PATCH liburing 0/5] liburing: add helpers to enable/disable eventfd notifications Stefano Garzarella
2020-05-15 16:43 ` Stefano Garzarella [this message]
2020-05-15 16:43 ` [PATCH liburing 2/5] man/io_uring_setup.2: add 'flags' field in the struct io_cqring_offsets Stefano Garzarella
2020-05-15 16:43 ` [PATCH liburing 3/5] Add helpers to set and get eventfd notification status Stefano Garzarella
2020-05-15 16:53   ` Jens Axboe
2020-05-15 17:11     ` Stefano Garzarella
2020-05-20 13:12       ` Stefano Garzarella
2020-05-20 13:43         ` Jens Axboe
2020-05-20 15:11           ` Stefano Garzarella
2020-05-20 15:19             ` Jens Axboe
2020-05-15 16:43 ` [PATCH liburing 4/5] man/io_uring_register.2: add IORING_CQ_EVENTFD_DISABLED description Stefano Garzarella
2020-05-15 16:43 ` [PATCH liburing 5/5] Add test/eventfd-disable.c test case Stefano Garzarella

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