From: mchristi@redhat.com
To: linux-f2fs-devel@lists.sourceforge.net,
linux-ext4@vger.kernel.org, konrad.wilk@oracle.com,
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Cc: Mike Christie <mchristi@redhat.com>
Subject: [PATCH 02/42] block: add REQ_OP definitions and bi_op/op fields
Date: Wed, 13 Apr 2016 14:35:48 -0500 [thread overview]
Message-ID: <1460576188-5751-3-git-send-email-mchristi@redhat.com> (raw)
In-Reply-To: <1460576188-5751-1-git-send-email-mchristi@redhat.com>
From: Mike Christie <mchristi@redhat.com>
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 <mchristi@redhat.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
---
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 f3895c1..6bcc22e 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;
@@ -2033,6 +2034,12 @@ 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;
@@ -2102,6 +2109,12 @@ 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.
@@ -2975,8 +2988,8 @@ 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 f3f232f..e2b2881 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);
--
2.7.2
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next prev parent reply other threads:[~2016-04-13 19:35 UTC|newest]
Thread overview: 46+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-04-13 19:35 [PATCH 00/42] v5: separate operations from flags in the bio/request structs mchristi
2016-04-13 19:35 ` [PATCH 01/42] block/fs/drivers: remove rw argument from submit_bio mchristi
2016-04-13 19:35 ` mchristi [this message]
2016-04-13 19:35 ` [PATCH 03/42] block, fs, mm, drivers: set bi_op to REQ_OP mchristi
2016-04-13 19:35 ` [PATCH 04/42] fs: have submit_bh users pass in op and flags separately mchristi
2016-04-13 19:35 ` [PATCH 05/42] fs: have ll_rw_block " mchristi
2016-04-13 19:35 ` [PATCH 06/42] direct-io: set bi_op to REQ_OP mchristi
2016-04-13 19:35 ` [PATCH 07/42] btrfs: have submit_one_bio users setup bio bi_op mchristi
2016-04-13 19:35 ` [PATCH 08/42] btrfs: set bi_op tp REQ_OP mchristi
2016-04-13 19:35 ` [PATCH 09/42] btrfs: update __btrfs_map_block for bi_op transition mchristi
2016-04-13 19:35 ` [PATCH 10/42] btrfs: use bio fields for op and flags mchristi
2016-04-13 19:35 ` [PATCH 11/42] f2fs: set bi_op to REQ_OP mchristi
2016-04-13 19:35 ` [PATCH 12/42] gfs2: " mchristi
2016-04-13 19:35 ` [PATCH 13/42] xfs: " mchristi
2016-04-13 19:36 ` [PATCH 14/42] hfsplus: " mchristi
2016-04-13 19:36 ` [PATCH 15/42] mpage: " mchristi
2016-04-13 19:36 ` [PATCH 16/42] nilfs: " mchristi
2016-04-13 19:36 ` [PATCH 17/42] ocfs2: " mchristi
2016-04-13 19:36 ` [PATCH 18/42] pm: " mchristi
2016-04-13 19:36 ` [PATCH 19/42] dm: " mchristi
2016-04-13 19:36 ` [PATCH 20/42] dm: pass dm stats data dir instead of bi_rw mchristi
2016-04-13 19:36 ` [PATCH 21/42] bcache: set bi_op to REQ_OP mchristi
2016-04-13 19:36 ` [PATCH 22/42] drbd: " mchristi
2016-04-13 19:36 ` [PATCH 23/42] md/raid: " mchristi
2016-04-13 19:36 ` [PATCH 24/42] xen: " mchristi
2016-04-13 19:36 ` [PATCH 25/42] target: " mchristi
2016-04-13 19:36 ` [PATCH 26/42] block: copy bio op to request op mchristi
2016-04-13 19:36 ` [PATCH 27/42] block: prepare request creation/destruction code to use REQ_OPs mchristi
2016-04-13 19:36 ` [PATCH 28/42] block: prepare mq request creation " mchristi
2016-04-13 19:36 ` [PATCH 29/42] block: prepare elevator " mchristi
2016-04-13 19:36 ` [PATCH 30/42] blkg_rwstat: separate op from flags mchristi
2016-04-13 19:36 ` [PATCH 31/42] block: convert merge/insert code to check for REQ_OPs mchristi
2016-04-13 19:36 ` [PATCH 32/42] block: convert is_sync helpers to use REQ_OPs mchristi
2016-04-13 19:36 ` [PATCH 33/42] block: convert rq_data_dir helper " mchristi
2016-04-13 19:36 ` [PATCH 34/42] drivers: set request op to REQ_OP mchristi
2016-04-13 19:36 ` [PATCH 35/42] blktrace: get op from req->op/bio->bi_op mchristi
2016-04-13 19:36 ` [PATCH 36/42] ide cd: do not set REQ_WRITE on requests mchristi
2016-04-13 19:36 ` [PATCH 37/42] block, fs, drivers: do use bi_rw/cmd_flags for REQ_OPs mchristi
2016-04-13 19:36 ` [PATCH 38/42] block, fs: remove old REQ definitions mchristi
2016-04-13 19:36 ` [PATCH 39/42] block: shrink bio/request fields mchristi
2016-04-13 19:36 ` [PATCH 40/42] block, drivers: add REQ_OP_FLUSH operation mchristi
2016-04-13 19:36 ` [PATCH 41/42] block: use QUEUE flags instead of flush_flags to test for flush support mchristi
2016-04-13 19:36 ` [PATCH 42/42] block, drivers, fs: rename REQ_FLUSH to REQ_PREFLUSH mchristi
2016-04-14 6:09 ` [PATCH 00/42] v5: separate operations from flags in the bio/request structs Hannes Reinecke
2016-04-15 10:39 [PATCH 00/42] v6: " mchristi
2016-04-15 10:39 ` [PATCH 02/42] block: add REQ_OP definitions and bi_op/op fields mchristi
2016-04-15 19:15 [PATCH 00/42] v7: separate operations from flags in the bio/request structs mchristi
2016-04-15 19:15 ` [PATCH 02/42] block: add REQ_OP definitions and bi_op/op fields mchristi
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