From patchwork Fri Apr 15 10:39:22 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: mchristi@redhat.com X-Patchwork-Id: 610823 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Received: from bombadil.infradead.org (bombadil.infradead.org [IPv6:2001:1868:205::9]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by ozlabs.org (Postfix) with ESMTPS id 3qmYyK0xTjz9t40 for ; Fri, 15 Apr 2016 20:42:17 +1000 (AEST) Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.80.1 #2 (Red Hat Linux)) id 1ar1At-00074d-Hk; Fri, 15 Apr 2016 10:40:31 +0000 Received: from mx1.redhat.com ([209.132.183.28]) by bombadil.infradead.org with esmtps (Exim 4.80.1 #2 (Red Hat Linux)) id 1ar1Ap-0006UK-Ks for linux-mtd@lists.infradead.org; Fri, 15 Apr 2016 10:40:29 +0000 Received: from int-mx11.intmail.prod.int.phx2.redhat.com (int-mx11.intmail.prod.int.phx2.redhat.com [10.5.11.24]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id E7A656265A; Fri, 15 Apr 2016 10:40:10 +0000 (UTC) Received: from rh2.redhat.com (vpn-48-158.rdu2.redhat.com [10.10.48.158]) by int-mx11.intmail.prod.int.phx2.redhat.com (8.14.4/8.14.4) with ESMTP id u3FAe31m010243; Fri, 15 Apr 2016 06:40:08 -0400 From: mchristi@redhat.com To: linux-f2fs-devel@lists.sourceforge.net, linux-ext4@vger.kernel.org, konrad.wilk@oracle.com, drbd-dev@lists.linbit.com, philipp.reisner@linbit.com, lars.ellenberg@linbit.com, linux-raid@vger.kernel.org, dm-devel@redhat.com, linux-fsdevel@vger.kernel.org, linux-bcache@vger.kernel.org, linux-block@vger.kernel.org, linux-kernel@vger.kernel.org, linux-scsi@vger.kernel.org, linux-mtd@lists.infradead.org, target-devel@vger.kernel.org, linux-btrfs@vger.kernel.org, osd-dev@open-osd.org, xfs@oss.sgi.com, ocfs2-devel@oss.oracle.com Subject: [PATCH 02/42] block: add REQ_OP definitions and bi_op/op fields Date: Fri, 15 Apr 2016 05:39:22 -0500 Message-Id: <1460716802-2294-3-git-send-email-mchristi@redhat.com> In-Reply-To: <1460716802-2294-1-git-send-email-mchristi@redhat.com> References: <1460716802-2294-1-git-send-email-mchristi@redhat.com> X-Scanned-By: MIMEDefang 2.68 on 10.5.11.24 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.39]); Fri, 15 Apr 2016 10:40:11 +0000 (UTC) X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20160415_034027_913919_1C908713 X-CRM114-Status: GOOD ( 19.38 ) X-Spam-Score: -7.9 (-------) X-Spam-Report: SpamAssassin version 3.4.0 on bombadil.infradead.org summary: Content analysis details: (-7.9 points) pts rule name description ---- ---------------------- -------------------------------------------------- -5.0 RCVD_IN_DNSWL_HI RBL: Sender listed at http://www.dnswl.org/, high trust [209.132.183.28 listed in list.dnswl.org] -1.0 RP_MATCHES_RCVD Envelope sender domain matches handover relay domain -0.0 SPF_PASS SPF: sender matches SPF record -0.0 SPF_HELO_PASS SPF: HELO matches SPF record -1.9 BAYES_00 BODY: Bayes spam probability is 0 to 1% [score: 0.0000] X-BeenThere: linux-mtd@lists.infradead.org X-Mailman-Version: 2.1.20 Precedence: list List-Id: Linux MTD discussion mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Mike Christie MIME-Version: 1.0 Sender: "linux-mtd" Errors-To: linux-mtd-bounces+incoming=patchwork.ozlabs.org@lists.infradead.org From: Mike Christie The following patches separate the operation (write, read, discard, etc) from the rq_flag_bits flags. This patch adds definitions for request/bio operations, adds fields to the request/bio to set them, and some temporary compat code so the kernel/modules can use either one. In the final patches this compat code will be removed when everything is converted. In this patch the REQ_OPs match the REQ rq_flag_bits ones for compat reasons while all the code is converted in this set. In the last patches that will abe removed and the bi_op field will be shrunk. Signed-off-by: Mike Christie Reviewed-by: Christoph Hellwig Reviewed-by: Hannes Reinecke --- block/blk-core.c | 19 ++++++++++++++++--- include/linux/blk_types.h | 15 ++++++++++++++- include/linux/blkdev.h | 1 + include/linux/fs.h | 37 +++++++++++++++++++++++++++++++++++-- 4 files changed, 66 insertions(+), 6 deletions(-) diff --git a/block/blk-core.c b/block/blk-core.c index e953407..3b238ef 100644 --- a/block/blk-core.c +++ b/block/blk-core.c @@ -1698,7 +1698,8 @@ void init_request_from_bio(struct request *req, struct bio *bio) { req->cmd_type = REQ_TYPE_FS; - req->cmd_flags |= bio->bi_rw & REQ_COMMON_MASK; + /* tmp compat. Allow users to set bi_op or bi_rw */ + req->cmd_flags |= (bio->bi_rw | bio->bi_op) & REQ_COMMON_MASK; if (bio->bi_rw & REQ_RAHEAD) req->cmd_flags |= REQ_FAILFAST_MASK; @@ -2034,6 +2035,12 @@ blk_qc_t generic_make_request(struct bio *bio) struct bio_list bio_list_on_stack; blk_qc_t ret = BLK_QC_T_NONE; + /* tmp compat. Allow users to set either one or both. + * This will be removed when we have converted + * everyone in the next patches. + */ + bio->bi_rw |= bio->bi_op; + if (!generic_make_request_checks(bio)) goto out; @@ -2103,6 +2110,12 @@ EXPORT_SYMBOL(generic_make_request); */ blk_qc_t submit_bio(struct bio *bio) { + /* tmp compat. Allow users to set either one or both. + * This will be removed when we have converted + * everyone in the next patches. + */ + bio->bi_rw |= bio->bi_op; + /* * If it's a regular read/write or a barrier with data attached, * go through the normal accounting stuff before submission. @@ -2976,8 +2989,8 @@ EXPORT_SYMBOL_GPL(__blk_end_request_err); void blk_rq_bio_prep(struct request_queue *q, struct request *rq, struct bio *bio) { - /* Bit 0 (R/W) is identical in rq->cmd_flags and bio->bi_rw */ - rq->cmd_flags |= bio->bi_rw & REQ_WRITE; + /* tmp compat. Allow users to set bi_op or bi_rw */ + rq->cmd_flags |= bio_data_dir(bio); if (bio_has_data(bio)) rq->nr_phys_segments = bio_phys_segments(q, bio); diff --git a/include/linux/blk_types.h b/include/linux/blk_types.h index 86a38ea..6e49c91 100644 --- a/include/linux/blk_types.h +++ b/include/linux/blk_types.h @@ -48,9 +48,15 @@ struct bio { struct block_device *bi_bdev; unsigned int bi_flags; /* status, command, etc */ int bi_error; - unsigned long bi_rw; /* bottom bits READ/WRITE, + unsigned long bi_rw; /* bottom bits rq_flags_bits * top bits priority */ + /* + * this will be a u8 in the next patches and bi_rw can be shrunk to + * a u32. For compat in these transistional patches op is a int here. + */ + int bi_op; /* REQ_OP */ + struct bvec_iter bi_iter; @@ -242,6 +248,13 @@ enum rq_flag_bits { #define REQ_HASHED (1ULL << __REQ_HASHED) #define REQ_MQ_INFLIGHT (1ULL << __REQ_MQ_INFLIGHT) +enum req_op { + REQ_OP_READ, + REQ_OP_WRITE = REQ_WRITE, + REQ_OP_DISCARD = REQ_DISCARD, + REQ_OP_WRITE_SAME = REQ_WRITE_SAME, +}; + typedef unsigned int blk_qc_t; #define BLK_QC_T_NONE -1U #define BLK_QC_T_SHIFT 16 diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h index 57c0859..bce32e2 100644 --- a/include/linux/blkdev.h +++ b/include/linux/blkdev.h @@ -96,6 +96,7 @@ struct request { struct request_queue *q; struct blk_mq_ctx *mq_ctx; + int op; u64 cmd_flags; unsigned cmd_type; unsigned long atomic_flags; diff --git a/include/linux/fs.h b/include/linux/fs.h index 69bdd03..96ace0f 100644 --- a/include/linux/fs.h +++ b/include/linux/fs.h @@ -2452,15 +2452,48 @@ extern void make_bad_inode(struct inode *); extern bool is_bad_inode(struct inode *); #ifdef CONFIG_BLOCK + +static inline bool op_is_write(int op) +{ + switch (op) { + case REQ_OP_WRITE: + case REQ_OP_WRITE_SAME: + case REQ_OP_DISCARD: + return true; + default: + return false; + } +} + /* * return READ, READA, or WRITE */ -#define bio_rw(bio) ((bio)->bi_rw & (RW_MASK | RWA_MASK)) +static inline int bio_rw(struct bio *bio) +{ + /* + * tmp cpmpat. Allow users to set either op or rw, until + * all code is converted in the next patches. + */ + if (op_is_write(bio->bi_op)) + return WRITE; + + return bio->bi_rw & (RW_MASK | RWA_MASK); +} /* * return data direction, READ or WRITE */ -#define bio_data_dir(bio) ((bio)->bi_rw & 1) +static inline int bio_data_dir(struct bio *bio) +{ + /* + * tmp cpmpat. Allow users to set either op or rw, until + * all code is converted in the next patches. + */ + if (op_is_write(bio->bi_op)) + return WRITE; + + return bio->bi_rw & 1; +} extern void check_disk_size_change(struct gendisk *disk, struct block_device *bdev);