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 10/11] mm: add kiocb_wait_page_async_init() helper
Date: Fri, 22 May 2020 14:23:10 -0600 [thread overview]
Message-ID: <20200522202311.10959-11-axboe@kernel.dk> (raw)
In-Reply-To: <20200522202311.10959-1-axboe@kernel.dk>
Checks if the file supports it, and initializes the values that we need.
Caller passes in 'data' pointer, if any, and the callback function to
be used.
Signed-off-by: Jens Axboe <axboe@kernel.dk>
---
include/linux/pagemap.h | 18 ++++++++++++++++++
1 file changed, 18 insertions(+)
diff --git a/include/linux/pagemap.h b/include/linux/pagemap.h
index 39af9f890866..dec61e9e5710 100644
--- a/include/linux/pagemap.h
+++ b/include/linux/pagemap.h
@@ -468,6 +468,24 @@ struct wait_page_async {
struct wait_page_key key;
};
+static inline int kiocb_wait_page_async_init(struct kiocb *kiocb,
+ struct wait_page_async *wait,
+ wait_queue_func_t func,
+ void *data)
+{
+ if (kiocb->ki_filp->f_mode & FMODE_BUF_RASYNC) {
+ wait->wait.func = func;
+ wait->wait.private = data;
+ wait->wait.flags = 0;
+ INIT_LIST_HEAD(&wait->wait.entry);
+ kiocb->ki_flags |= IOCB_WAITQ;
+ kiocb->private = wait;
+ return 0;
+ }
+
+ return -EOPNOTSUPP;
+}
+
extern void __lock_page(struct page *page);
extern int __lock_page_killable(struct page *page);
extern int __lock_page_async(struct page *page, struct wait_page_async *wait);
--
2.26.2
next prev parent reply other threads:[~2020-05-22 20:23 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-05-22 20:23 [PATCHSET RFC 0/11] Add support for async buffered reads Jens Axboe
2020-05-22 20:23 ` [PATCH 01/11] block: read-ahead submission should imply no-wait as well Jens Axboe
2020-05-22 20:23 ` [PATCH 02/11] mm: allow read-ahead with IOCB_NOWAIT set Jens Axboe
2020-05-22 20:23 ` [PATCH 03/11] mm: add support for async page locking Jens Axboe
2020-05-22 20:57 ` [PATCH v2 " Jens Axboe
2020-05-22 20:23 ` [PATCH 04/11] mm: support async buffered reads in generic_file_buffered_read() Jens Axboe
2020-05-22 20:23 ` [PATCH 05/11] fs: add FMODE_BUF_RASYNC Jens Axboe
2020-05-22 20:23 ` [PATCH 06/11] ext4: flag as supporting buffered async reads Jens Axboe
2020-05-22 20:23 ` [PATCH 07/11] block: flag block devices as supporting IOCB_WAITQ Jens Axboe
2020-05-22 20:23 ` [PATCH 08/11] xfs: flag files as supporting buffered async reads Jens Axboe
2020-05-22 20:23 ` [PATCH 09/11] btrfs: " Jens Axboe
2020-05-22 20:23 ` Jens Axboe [this message]
2020-05-22 20:23 ` [PATCH 11/11] io_uring: support true async buffered reads, if file provides it Jens Axboe
2020-05-23 1:50 [PATCHSET v2 RFC 0/11] Add support for async buffered reads Jens Axboe
2020-05-23 1:50 ` [PATCH 10/11] mm: add kiocb_wait_page_async_init() helper Jens Axboe
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