Return-Path: Received: from mailout1.samsung.com ([203.254.224.24]:23873 "EHLO mailout1.samsung.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1730795AbfAIPdp (ORCPT ); Wed, 9 Jan 2019 10:33:45 -0500 From: Kanchan Joshi To: linux-fsdevel@vger.kernel.org Cc: linux-block@vger.kernel.org, linux-ext4@vger.kernel.org, linux-nvme@lists.infradead.org, jack@suse.com, david@fromorbit.com, tytso@mit.edu, prakash.v@samsung.com, Kanchan Joshi Subject: [PATCH 3/4] fs: introduce APIs to enable sending write-hint with buffer-head Date: Wed, 09 Jan 2019 21:01:00 +0530 Message-id: <1547047861-7271-4-git-send-email-joshi.k@samsung.com> In-reply-to: <1547047861-7271-1-git-send-email-joshi.k@samsung.com> References: <1547047861-7271-1-git-send-email-joshi.k@samsung.com> Sender: linux-ext4-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 | 18 ++++++++++++++++-- include/linux/buffer_head.h | 3 +++ 2 files changed, 19 insertions(+), 2 deletions(-) diff --git a/fs/buffer.c b/fs/buffer.c index d60d61e..2a94676 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 @@ -3151,6 +3158,13 @@ EXPORT_SYMBOL(ll_rw_block); void write_dirty_buffer(struct buffer_head *bh, int op_flags) { + write_dirty_buffer_with_hint(bh, op_flags, 0); +} +EXPORT_SYMBOL(write_dirty_buffer); + +void write_dirty_buffer_with_hint(struct buffer_head *bh, int op_flags, + enum rw_hint hint) +{ lock_buffer(bh); if (!test_clear_buffer_dirty(bh)) { unlock_buffer(bh); @@ -3158,9 +3172,9 @@ void write_dirty_buffer(struct buffer_head *bh, int op_flags) } bh->b_end_io = end_buffer_write_sync; get_bh(bh); - submit_bh(REQ_OP_WRITE, op_flags, bh); + submit_bh_wbc(REQ_OP_WRITE, op_flags, bh, hint, NULL); } -EXPORT_SYMBOL(write_dirty_buffer); +EXPORT_SYMBOL(write_dirty_buffer_with_hint); /* * For a data-integrity writeout, we need to wait upon any in-progress I/O diff --git a/include/linux/buffer_head.h b/include/linux/buffer_head.h index 7b73ef7..3d682ac 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_with_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