From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mailout4.samsung.com ([203.254.224.34]:23631 "EHLO mailout4.samsung.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726727AbeLJMw6 (ORCPT ); Mon, 10 Dec 2018 07:52:58 -0500 From: Kanchan Joshi To: linux-ext4@vger.kernel.org, linux-fsdevel@vger.kernel.org Cc: tytso@mit.edu, adilger.kernel@dilger.ca, jack@suse.com, viro@zeniv.linux.org.uk, darrick.wong@oracle.com, axboe@kernel.dk, jrdr.linux@gmail.com, ebiggers@google.com, jooyoung.hwang@samsung.com, chur.lee@samsung.com, prakash.v@samsung.com, Kanchan Joshi Subject: [PATCH 1/2] fs: introduce APIs to enable sending write-hint with buffer-head Date: Mon, 10 Dec 2018 18:20:03 +0530 Message-id: <1544446204-5291-2-git-send-email-joshi.k@samsung.com> In-reply-to: <1544446204-5291-1-git-send-email-joshi.k@samsung.com> References: <1544446204-5291-1-git-send-email-joshi.k@samsung.com> Sender: linux-fsdevel-owner@vger.kernel.org List-ID: submit_bh and write_dirty_buffer do not take write-hint as parameter. This patch introduces variants which do. Signed-off-by: Kanchan Joshi --- fs/buffer.c | 21 +++++++++++++++++++++ include/linux/buffer_head.h | 3 +++ 2 files changed, 24 insertions(+) diff --git a/fs/buffer.c b/fs/buffer.c index 1286c2b..60c8867 100644 --- a/fs/buffer.c +++ b/fs/buffer.c @@ -3094,6 +3094,13 @@ int submit_bh(int op, int op_flags, struct buffer_head *bh) } EXPORT_SYMBOL(submit_bh); +int submit_bh_write_hint(int op, int op_flags, struct buffer_head *bh, + enum rw_hint hint) +{ + return submit_bh_wbc(op, op_flags, bh, hint, NULL); +} +EXPORT_SYMBOL(submit_bh_write_hint); + /** * ll_rw_block: low-level access to block devices (DEPRECATED) * @op: whether to %READ or %WRITE @@ -3162,6 +3169,20 @@ void write_dirty_buffer(struct buffer_head *bh, int op_flags) } EXPORT_SYMBOL(write_dirty_buffer); +void write_dirty_buffer_write_hint(struct buffer_head *bh, int op_flags, + enum rw_hint hint) +{ + lock_buffer(bh); + if (!test_clear_buffer_dirty(bh)) { + unlock_buffer(bh); + return; + } + bh->b_end_io = end_buffer_write_sync; + get_bh(bh); + submit_bh_wbc(REQ_OP_WRITE, op_flags, bh, hint, NULL); +} +EXPORT_SYMBOL(write_dirty_buffer_write_hint); + /* * For a data-integrity writeout, we need to wait upon any in-progress I/O * and then start new I/O and then wait upon it. The caller must have a ref on diff --git a/include/linux/buffer_head.h b/include/linux/buffer_head.h index 7b73ef7..ac9f111 100644 --- a/include/linux/buffer_head.h +++ b/include/linux/buffer_head.h @@ -200,7 +200,10 @@ void ll_rw_block(int, int, int, struct buffer_head * bh[]); int sync_dirty_buffer(struct buffer_head *bh); int __sync_dirty_buffer(struct buffer_head *bh, int op_flags); void write_dirty_buffer(struct buffer_head *bh, int op_flags); +void write_dirty_buffer_write_hint(struct buffer_head *bh, int op_flags, + enum rw_hint hint); int submit_bh(int, int, struct buffer_head *); +int submit_bh_write_hint(int, int, struct buffer_head *, enum rw_hint hint); void write_boundary_block(struct block_device *bdev, sector_t bblock, unsigned blocksize); int bh_uptodate_or_lock(struct buffer_head *bh); -- 2.7.4