The patch titled
Subject: fs: use RWF_* flags for AIO operations
has been added to the -mm tree. Its filename is
fs-use-rwf_-flags-for-aio-operations.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/fs-use-rwf_-flags-for-aio-operations.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/fs-use-rwf_-flags-for-aio-operations.patch
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*** Remember to use Documentation/SubmitChecklist when testing your code ***
The -mm tree is included into linux-next and is updated
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------------------------------------------------------
From: Goldwyn Rodrigues <rgoldwyn@xxxxxxxx>
Subject: fs: use RWF_* flags for AIO operations
aio_rw_flags is introduced in struct iocb (using aio_reserved1) which will
carry the RWF_* flags. We cannot use aio_flags because they are not
checked for validity which may break existing applications.
Note, the only place RWF_HIPRI comes in effect is dio_await_one(). All
the rest of the locations, aio code return -EIOCBQUEUED before the checks
for RWF_HIPRI.
Link: http://lkml.kernel.org/r/20170615160002.17233-4-rgoldwyn@xxxxxxx
Signed-off-by: Goldwyn Rodrigues <rgoldwyn@xxxxxxxx>
Reviewed-by: Christoph Hellwig <hch@xxxxxx>
Reviewed-by: Jan Kara <jack@xxxxxxx>
Cc: "Theodore Ts'o" <tytso@xxxxxxx>
Cc: Al Viro <viro@xxxxxxxxxxxxxxxxxx>
Cc: Andreas Dilger <adilger.kernel@xxxxxxxxx>
Cc: Chris Mason <clm@xxxxxx>
Cc: Darrick J. Wong <darrick.wong@xxxxxxxxxx>
Cc: David Sterba <dsterba@xxxxxxxx>
Cc: Jens Axboe <axboe@xxxxxxxxx>
Cc: Josef Bacik <jbacik@xxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
fs/aio.c | 8 +++++++-
include/uapi/linux/aio_abi.h | 2 +-
2 files changed, 8 insertions(+), 2 deletions(-)
diff -puN fs/aio.c~fs-use-rwf_-flags-for-aio-operations fs/aio.c
--- a/fs/aio.c~fs-use-rwf_-flags-for-aio-operations
+++ a/fs/aio.c
@@ -1541,7 +1541,7 @@ static int io_submit_one(struct kioctx *
ssize_t ret;
/* enforce forwards compatibility on users */
- if (unlikely(iocb->aio_reserved1 || iocb->aio_reserved2)) {
+ if (unlikely(iocb->aio_reserved2)) {
pr_debug("EINVAL: reserve field set\n");
return -EINVAL;
}
@@ -1586,6 +1586,12 @@ static int io_submit_one(struct kioctx *
req->common.ki_flags |= IOCB_EVENTFD;
}
+ ret = kiocb_set_rw_flags(&req->common, iocb->aio_rw_flags);
+ if (unlikely(ret)) {
+ pr_debug("EINVAL: aio_rw_flags\n");
+ goto out_put_req;
+ }
+
ret = put_user(KIOCB_KEY, &user_iocb->aio_key);
if (unlikely(ret)) {
pr_debug("EFAULT: aio_key\n");
diff -puN include/uapi/linux/aio_abi.h~fs-use-rwf_-flags-for-aio-operations include/uapi/linux/aio_abi.h
--- a/include/uapi/linux/aio_abi.h~fs-use-rwf_-flags-for-aio-operations
+++ a/include/uapi/linux/aio_abi.h
@@ -79,7 +79,7 @@ struct io_event {
struct iocb {
/* these are internal to the kernel/libc. */
__u64 aio_data; /* data to be returned in event's data */
- __u32 PADDED(aio_key, aio_reserved1);
+ __u32 PADDED(aio_key, aio_rw_flags);
/* the kernel sets aio_key to the req # */
/* common fields */
_
Patches currently in -mm which might be from rgoldwyn@xxxxxxxx are
fs-separate-out-kiocb-flags-setup-based-on-rwf_-flags.patch
fs-introduce-filemap_range_has_page.patch
fs-use-rwf_-flags-for-aio-operations.patch
fs-introduce-rwf_nowait-and-fmode_aio_nowait.patch
fs-return-if-direct-write-will-trigger-writeback.patch
fs-introduce-iomap_nowait.patch
block-return-on-congested-block-device.patch
ext4-nowait-aio-support.patch
xfs-nowait-aio-support.patch
btrfs-nowait-aio-support.patch
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