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From: Jens Axboe <axboe@kernel.dk>
To: io-uring@vger.kernel.org
Cc: linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org,
	linux-mm@kvack.org, Jens Axboe <axboe@kernel.dk>
Subject: [PATCH 05/11] fs: add FMODE_BUF_RASYNC
Date: Fri, 22 May 2020 19:50:43 -0600
Message-ID: <20200523015049.14808-6-axboe@kernel.dk> (raw)
In-Reply-To: <20200523015049.14808-1-axboe@kernel.dk>

If set, this indicates that the file system supports IOCB_WAITQ for
buffered reads.

Signed-off-by: Jens Axboe <axboe@kernel.dk>
---
 include/linux/fs.h | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/include/linux/fs.h b/include/linux/fs.h
index 82b989695ab9..0ef5f5973b1c 100644
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -175,6 +175,9 @@ typedef int (dio_iodone_t)(struct kiocb *iocb, loff_t offset,
 /* File does not contribute to nr_files count */
 #define FMODE_NOACCOUNT		((__force fmode_t)0x20000000)
 
+/* File supports async buffered reads */
+#define FMODE_BUF_RASYNC	((__force fmode_t)0x40000000)
+
 /*
  * Flag for rw_copy_check_uvector and compat_rw_copy_check_uvector
  * that indicates that they should check the contents of the iovec are
-- 
2.26.2


  parent reply index

Thread overview: 13+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-05-23  1:50 [PATCHSET v2 RFC 0/11] Add support for async buffered reads Jens Axboe
2020-05-23  1:50 ` [PATCH 01/11] block: read-ahead submission should imply no-wait as well Jens Axboe
2020-05-23  1:50 ` [PATCH 02/11] mm: allow read-ahead with IOCB_NOWAIT set Jens Axboe
2020-05-23  1:50 ` [PATCH 03/11] mm: add support for async page locking Jens Axboe
2020-05-23  1:50 ` [PATCH 04/11] mm: support async buffered reads in generic_file_buffered_read() Jens Axboe
2020-05-23  1:50 ` Jens Axboe [this message]
2020-05-23  1:50 ` [PATCH 06/11] ext4: flag as supporting buffered async reads Jens Axboe
2020-05-23  1:50 ` [PATCH 07/11] block: flag block devices as supporting IOCB_WAITQ Jens Axboe
2020-05-23  1:50 ` [PATCH 08/11] xfs: flag files as supporting buffered async reads Jens Axboe
2020-05-23  1:50 ` [PATCH 09/11] btrfs: " Jens Axboe
2020-05-23  1:50 ` [PATCH 10/11] mm: add kiocb_wait_page_async_init() helper Jens Axboe
2020-05-23  1:50 ` [PATCH 11/11] io_uring: support true async buffered reads, if file provides it Jens Axboe
  -- strict thread matches above, loose matches on Subject: below --
2020-05-22 20:23 [PATCHSET RFC 0/11] Add support for async buffered reads Jens Axboe
2020-05-22 20:23 ` [PATCH 05/11] fs: add FMODE_BUF_RASYNC Jens Axboe

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