From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-io0-f176.google.com ([209.85.223.176]:34046 "EHLO mail-io0-f176.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751757AbdFOQmW (ORCPT ); Thu, 15 Jun 2017 12:42:22 -0400 Received: by mail-io0-f176.google.com with SMTP id i7so15438541ioe.1 for ; Thu, 15 Jun 2017 09:42:22 -0700 (PDT) From: Jens Axboe To: linux-fsdevel@vger.kernel.org, linux-block@vger.kernel.org Cc: adilger@dilger.ca, hch@infradead.org, martin.petersen@oracle.com, Jens Axboe Subject: [PATCH 06/12] block: add helpers for setting/checking write hint validity Date: Thu, 15 Jun 2017 10:42:04 -0600 Message-Id: <1497544930-19174-7-git-send-email-axboe@kernel.dk> In-Reply-To: <1497544930-19174-1-git-send-email-axboe@kernel.dk> References: <1497544930-19174-1-git-send-email-axboe@kernel.dk> Sender: linux-fsdevel-owner@vger.kernel.org List-ID: We map the WRITE_HINT_* life time hints to the internal flags. Drivers can then, in turn, map those flags to a suitable stream type. Signed-off-by: Jens Axboe --- block/bio.c | 16 ++++++++++++++++ include/linux/bio.h | 1 + include/linux/blk_types.h | 5 +++++ 3 files changed, 22 insertions(+) diff --git a/block/bio.c b/block/bio.c index 888e7801c638..758d83d91bb0 100644 --- a/block/bio.c +++ b/block/bio.c @@ -2082,6 +2082,22 @@ void bio_clone_blkcg_association(struct bio *dst, struct bio *src) #endif /* CONFIG_BLK_CGROUP */ +static const unsigned int rwf_write_to_opf_flag[] = { + 0, REQ_WRITE_SHORT, REQ_WRITE_MEDIUM, REQ_WRITE_LONG, REQ_WRITE_EXTREME +}; + +/* + * Convert WRITE_LIFE_* hints into req/bio flags + */ +unsigned int bio_op_write_hint(enum write_hint hint) +{ + if (WARN_ON_ONCE(hint >= ARRAY_SIZE(rwf_write_to_opf_flag))) + return 0; + + return rwf_write_to_opf_flag[hint]; +} +EXPORT_SYMBOL_GPL(bio_op_write_hint); + static void __init biovec_init_slabs(void) { int i; diff --git a/include/linux/bio.h b/include/linux/bio.h index d1b04b0e99cf..e9360dc5ea07 100644 --- a/include/linux/bio.h +++ b/include/linux/bio.h @@ -443,6 +443,7 @@ extern struct bio *bio_copy_kern(struct request_queue *, void *, unsigned int, gfp_t, int); extern void bio_set_pages_dirty(struct bio *bio); extern void bio_check_pages_dirty(struct bio *bio); +extern unsigned int bio_op_write_hint(enum write_hint hint); void generic_start_io_acct(int rw, unsigned long sectors, struct hd_struct *part); diff --git a/include/linux/blk_types.h b/include/linux/blk_types.h index 57d1eb530799..23646eb433e7 100644 --- a/include/linux/blk_types.h +++ b/include/linux/blk_types.h @@ -323,4 +323,9 @@ struct blk_rq_stat { u64 batch; }; +static inline bool op_write_hint_valid(unsigned int opf) +{ + return (opf & REQ_WRITE_LIFE_MASK) != 0; +} + #endif /* __LINUX_BLK_TYPES_H */ -- 2.7.4