From: Jens Axboe <axboe@kernel.dk>
To: linux-aio@kvack.org, linux-block@vger.kernel.org,
linux-api@vger.kernel.org
Cc: hch@lst.de, jmoyer@redhat.com, avi@scylladb.com,
jannh@google.com, viro@ZenIV.linux.org.uk,
Jens Axboe <axboe@kernel.dk>
Subject: [PATCH 01/19] fs: add an iopoll method to struct file_operations
Date: Mon, 11 Feb 2019 12:00:30 -0700 [thread overview]
Message-ID: <20190211190049.7888-2-axboe@kernel.dk> (raw)
In-Reply-To: <20190211190049.7888-1-axboe@kernel.dk>
From: Christoph Hellwig <hch@lst.de>
This new methods is used to explicitly poll for I/O completion for an
iocb. It must be called for any iocb submitted asynchronously (that
is with a non-null ki_complete) which has the IOCB_HIPRI flag set.
The method is assisted by a new ki_cookie field in struct iocb to store
the polling cookie.
Reviewed-by: Hannes Reinecke <hare@suse.com>
Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
---
Documentation/filesystems/vfs.txt | 3 +++
include/linux/fs.h | 2 ++
2 files changed, 5 insertions(+)
diff --git a/Documentation/filesystems/vfs.txt b/Documentation/filesystems/vfs.txt
index 8dc8e9c2913f..761c6fd24a53 100644
--- a/Documentation/filesystems/vfs.txt
+++ b/Documentation/filesystems/vfs.txt
@@ -857,6 +857,7 @@ struct file_operations {
ssize_t (*write) (struct file *, const char __user *, size_t, loff_t *);
ssize_t (*read_iter) (struct kiocb *, struct iov_iter *);
ssize_t (*write_iter) (struct kiocb *, struct iov_iter *);
+ int (*iopoll)(struct kiocb *kiocb, bool spin);
int (*iterate) (struct file *, struct dir_context *);
int (*iterate_shared) (struct file *, struct dir_context *);
__poll_t (*poll) (struct file *, struct poll_table_struct *);
@@ -902,6 +903,8 @@ otherwise noted.
write_iter: possibly asynchronous write with iov_iter as source
+ iopoll: called when aio wants to poll for completions on HIPRI iocbs
+
iterate: called when the VFS needs to read the directory contents
iterate_shared: called when the VFS needs to read the directory contents
diff --git a/include/linux/fs.h b/include/linux/fs.h
index 29d8e2cfed0e..dedcc2e9265c 100644
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -310,6 +310,7 @@ struct kiocb {
int ki_flags;
u16 ki_hint;
u16 ki_ioprio; /* See linux/ioprio.h */
+ unsigned int ki_cookie; /* for ->iopoll */
} __randomize_layout;
static inline bool is_sync_kiocb(struct kiocb *kiocb)
@@ -1787,6 +1788,7 @@ struct file_operations {
ssize_t (*write) (struct file *, const char __user *, size_t, loff_t *);
ssize_t (*read_iter) (struct kiocb *, struct iov_iter *);
ssize_t (*write_iter) (struct kiocb *, struct iov_iter *);
+ int (*iopoll)(struct kiocb *kiocb, bool spin);
int (*iterate) (struct file *, struct dir_context *);
int (*iterate_shared) (struct file *, struct dir_context *);
__poll_t (*poll) (struct file *, struct poll_table_struct *);
--
2.17.1
next prev parent reply other threads:[~2019-02-11 19:00 UTC|newest]
Thread overview: 57+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-02-11 19:00 [PATCHSET v15] io_uring IO interface Jens Axboe
2019-02-11 19:00 ` Jens Axboe [this message]
2019-02-11 19:00 ` [PATCH] io_uring: add io_uring_event cache hit information Jens Axboe
2019-02-11 19:00 ` [PATCH 02/19] block: wire up block device iopoll method Jens Axboe
2019-02-11 19:00 ` [PATCH 03/19] block: add bio_set_polled() helper Jens Axboe
2019-02-11 19:00 ` [PATCH 04/19] iomap: wire up the iopoll method Jens Axboe
2019-02-11 19:00 ` [PATCH 05/19] Add io_uring IO interface Jens Axboe
2019-02-11 19:00 ` [PATCH 06/19] io_uring: add fsync support Jens Axboe
2019-02-11 19:00 ` [PATCH 07/19] io_uring: support for IO polling Jens Axboe
2019-02-11 19:00 ` [PATCH 08/19] fs: add fget_many() and fput_many() Jens Axboe
2019-02-11 19:00 ` [PATCH 09/19] io_uring: use fget/fput_many() for file references Jens Axboe
2019-02-11 19:00 ` [PATCH 10/19] io_uring: batch io_kiocb allocation Jens Axboe
2019-02-11 19:00 ` [PATCH 11/19] block: implement bio helper to add iter bvec pages to bio Jens Axboe
2019-02-20 22:58 ` Ming Lei
2019-02-21 17:45 ` Jens Axboe
2019-02-26 3:46 ` Eric Biggers
2019-02-26 4:34 ` Jens Axboe
2019-02-26 15:54 ` Jens Axboe
2019-02-27 1:21 ` Ming Lei
2019-02-27 1:47 ` Jens Axboe
2019-02-27 1:53 ` Ming Lei
2019-02-27 1:57 ` Jens Axboe
2019-02-27 2:21 ` Ming Lei
2019-02-27 2:28 ` Jens Axboe
2019-02-27 2:37 ` Ming Lei
2019-02-27 2:43 ` Jens Axboe
2019-02-27 3:09 ` Ming Lei
2019-02-27 3:37 ` Jens Axboe
2019-02-27 3:43 ` Jens Axboe
2019-02-27 3:44 ` Ming Lei
2019-02-27 4:05 ` Jens Axboe
2019-02-27 4:06 ` Jens Axboe
2019-02-27 19:42 ` Christoph Hellwig
2019-02-28 8:37 ` Ming Lei
2019-02-27 23:35 ` Ming Lei
2019-03-08 7:55 ` Christoph Hellwig
2019-03-08 9:12 ` Ming Lei
2019-03-08 8:18 ` Christoph Hellwig
2019-02-11 19:00 ` [PATCH 12/19] io_uring: add support for pre-mapped user IO buffers Jens Axboe
2019-02-19 19:08 ` Jann Horn
2019-02-22 22:29 ` Jens Axboe
2019-02-11 19:00 ` [PATCH 13/19] net: split out functions related to registering inflight socket files Jens Axboe
2019-02-11 19:00 ` [PATCH 14/19] io_uring: add file set registration Jens Axboe
2019-02-19 16:12 ` Jann Horn
2019-02-22 22:29 ` Jens Axboe
2019-02-11 19:00 ` [PATCH 15/19] io_uring: add submission polling Jens Axboe
2019-02-11 19:00 ` [PATCH 16/19] io_uring: add io_kiocb ref count Jens Axboe
2019-02-11 19:00 ` [PATCH 17/19] io_uring: add support for IORING_OP_POLL Jens Axboe
2019-02-11 19:00 ` [PATCH 18/19] io_uring: allow workqueue item to handle multiple buffered requests Jens Axboe
2019-02-11 19:00 ` [PATCH 19/19] io_uring: add io_uring_event cache hit information Jens Axboe
2019-02-21 12:10 ` [PATCHSET v15] io_uring IO interface Marek Majkowski
2019-02-21 17:48 ` Jens Axboe
2019-02-22 15:01 ` Marek Majkowski
2019-02-22 22:32 ` Jens Axboe
-- strict thread matches above, loose matches on Subject: below --
2019-02-09 21:13 [PATCHSET v14] " Jens Axboe
2019-02-09 21:13 ` [PATCH 01/19] fs: add an iopoll method to struct file_operations Jens Axboe
2019-02-08 17:34 [PATCHSET v13] io_uring IO interface Jens Axboe
2019-02-08 17:34 ` [PATCH 01/19] fs: add an iopoll method to struct file_operations Jens Axboe
2019-02-09 9:20 ` Hannes Reinecke
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