From: Stefan Roesch <[email protected]>
To: <[email protected]>, <[email protected]>,
<[email protected]>, <[email protected]>,
<[email protected]>
Cc: <[email protected]>, <[email protected]>, <[email protected]>, <[email protected]>
Subject: [RFC PATCH v4 13/17] io_uring: Add support for async buffered writes
Date: Fri, 20 May 2022 11:36:42 -0700 [thread overview]
Message-ID: <[email protected]> (raw)
In-Reply-To: <[email protected]>
This enables the async buffered writes for the filesystems that support
async buffered writes in io-uring. Buffered writes are enabled for
blocks that are already in the page cache or can be acquired with noio.
Signed-off-by: Stefan Roesch <[email protected]>
---
fs/io_uring.c | 29 ++++++++++++++++++++++++-----
1 file changed, 24 insertions(+), 5 deletions(-)
diff --git a/fs/io_uring.c b/fs/io_uring.c
index 91de361ea9ab..f3aaac286509 100644
--- a/fs/io_uring.c
+++ b/fs/io_uring.c
@@ -3746,7 +3746,7 @@ static inline int io_iter_do_read(struct io_kiocb *req, struct iov_iter *iter)
return -EINVAL;
}
-static bool need_read_all(struct io_kiocb *req)
+static bool need_complete_io(struct io_kiocb *req)
{
return req->flags & REQ_F_ISREG ||
S_ISBLK(file_inode(req->file)->i_mode);
@@ -3875,7 +3875,7 @@ static int io_read(struct io_kiocb *req, unsigned int issue_flags)
} else if (ret == -EIOCBQUEUED) {
goto out_free;
} else if (ret == req->result || ret <= 0 || !force_nonblock ||
- (req->flags & REQ_F_NOWAIT) || !need_read_all(req)) {
+ (req->flags & REQ_F_NOWAIT) || !need_complete_io(req)) {
/* read all, failed, already did sync or don't want to retry */
goto done;
}
@@ -3971,9 +3971,10 @@ static int io_write(struct io_kiocb *req, unsigned int issue_flags)
if (unlikely(!io_file_supports_nowait(req)))
goto copy_iov;
- /* file path doesn't support NOWAIT for non-direct_IO */
- if (force_nonblock && !(kiocb->ki_flags & IOCB_DIRECT) &&
- (req->flags & REQ_F_ISREG))
+ /* File path supports NOWAIT for non-direct_IO only for block devices. */
+ if (!(kiocb->ki_flags & IOCB_DIRECT) &&
+ !(kiocb->ki_filp->f_mode & FMODE_BUF_WASYNC) &&
+ (req->flags & REQ_F_ISREG))
goto copy_iov;
kiocb->ki_flags |= IOCB_NOWAIT;
@@ -4027,6 +4028,24 @@ static int io_write(struct io_kiocb *req, unsigned int issue_flags)
/* IOPOLL retry should happen for io-wq threads */
if (ret2 == -EAGAIN && (req->ctx->flags & IORING_SETUP_IOPOLL))
goto copy_iov;
+
+ if (ret2 != req->result && ret2 >= 0 && need_complete_io(req)) {
+ struct io_async_rw *rw;
+
+ /* This is a partial write. The file pos has already been
+ * updated, setup the async struct to complete the request
+ * in the worker. Also update bytes_done to account for
+ * the bytes already written.
+ */
+ iov_iter_save_state(&s->iter, &s->iter_state);
+ ret = io_setup_async_rw(req, iovec, s, true);
+
+ rw = req->async_data;
+ if (rw)
+ rw->bytes_done += ret2;
+
+ return ret ? ret : -EAGAIN;
+ }
done:
kiocb_done(req, ret2, issue_flags);
} else {
--
2.30.2
next prev parent reply other threads:[~2022-05-20 18:37 UTC|newest]
Thread overview: 39+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-05-20 18:36 [RFC PATCH v4 00/17] io-uring/xfs: support async buffered writes Stefan Roesch
2022-05-20 18:36 ` [RFC PATCH v4 01/17] mm: Move starting of background writeback into the main balancing loop Stefan Roesch
2022-05-20 18:36 ` [RFC PATCH v4 02/17] mm: Move updates of dirty_exceeded into one place Stefan Roesch
2022-05-20 18:36 ` [RFC PATCH v4 03/17] mm: Prepare balance_dirty_pages() for async buffered writes Stefan Roesch
2022-05-22 7:17 ` Christoph Hellwig
2022-05-25 21:30 ` Stefan Roesch
2022-05-20 18:36 ` [RFC PATCH v4 04/17] mm: Add balance_dirty_pages_ratelimited_flags() function Stefan Roesch
2022-05-23 10:40 ` Jan Kara
2022-05-20 18:36 ` [RFC PATCH v4 05/17] iomap: Add gfp parameter to iomap_page_create() Stefan Roesch
2022-05-22 7:21 ` Christoph Hellwig
2022-05-25 21:29 ` Stefan Roesch
2022-05-20 18:36 ` [RFC PATCH v4 06/17] iomap: Add async buffered write support Stefan Roesch
2022-05-20 18:36 ` [RFC PATCH v4 07/17] iomap: Use balance_dirty_pages_ratelimited_flags in iomap_write_iter Stefan Roesch
2022-05-22 7:19 ` Christoph Hellwig
2022-05-25 21:32 ` Stefan Roesch
2022-05-20 18:36 ` [RFC PATCH v4 08/17] fs: Add check for async buffered writes to generic_write_checks Stefan Roesch
2022-05-20 18:36 ` [RFC PATCH v4 09/17] fs: Split off remove_needs_file_privs() __remove_file_privs() Stefan Roesch
2022-05-22 7:32 ` Christoph Hellwig
2022-05-25 21:34 ` Stefan Roesch
2022-05-20 18:36 ` [RFC PATCH v4 10/17] fs: Split off file_needs_update_time and __file_update_time Stefan Roesch
2022-05-22 7:29 ` Christoph Hellwig
2022-05-25 22:32 ` Stefan Roesch
2022-05-20 18:36 ` [RFC PATCH v4 11/17] fs: Add async write file modification handling Stefan Roesch
2022-05-22 7:24 ` Christoph Hellwig
2022-05-25 21:39 ` Stefan Roesch
2022-05-20 18:36 ` [RFC PATCH v4 12/17] fs: Optimization for concurrent file time updates Stefan Roesch
2022-05-23 10:51 ` Jan Kara
2022-05-25 21:46 ` Stefan Roesch
2022-05-20 18:36 ` Stefan Roesch [this message]
2022-05-20 18:36 ` [RFC PATCH v4 14/17] io_uring: Add tracepoint for short writes Stefan Roesch
2022-05-20 18:36 ` [RFC PATCH v4 15/17] xfs: Add iomap async buffered write support Stefan Roesch
2022-05-22 7:33 ` Christoph Hellwig
2022-05-25 21:40 ` Stefan Roesch
2022-05-20 18:36 ` [RFC PATCH v4 16/17] xfs: Add " Stefan Roesch
2022-05-22 7:34 ` Christoph Hellwig
2022-05-25 21:41 ` Stefan Roesch
2022-05-22 15:35 ` Darrick J. Wong
2022-05-25 21:44 ` Stefan Roesch
2022-05-20 18:36 ` [RFC PATCH v4 17/17] xfs: Enable " Stefan Roesch
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