[PATCH 37/45] drivers: use req op accessor

mchristi
2016-06-05T19:33:59Z

The req operation REQ_OP is separated from the rq_flag_bits
definition. This converts the block layer drivers to
use req_op to get the op from the request struct.

Signed-off-by: Mike Christie <mchristi@redhat.com>
---
drivers/block/loop.c | 6 +++---
drivers/block/mtip32xx/mtip32xx.c | 2 +-
drivers/block/nbd.c | 2 +-
drivers/block/rbd.c | 4 ++--
drivers/block/xen-blkfront.c | 8 +++++---
drivers/ide/ide-floppy.c | 2 +-
drivers/md/dm.c | 2 +-
drivers/mmc/card/block.c | 7 +++----
drivers/mmc/card/queue.c | 6 ++----
drivers/mmc/card/queue.h | 5 ++++-
drivers/mtd/mtd_blkdevs.c | 2 +-
drivers/nvme/host/core.c | 2 +-
drivers/nvme/host/nvme.h | 4 ++--
drivers/scsi/sd.c | 25 ++++++++++++++++---------
14 files changed, 43 insertions(+), 34 deletions(-)

diff --git a/drivers/block/loop.c b/drivers/block/loop.c
index e9f1701..b9b737c 100644
--- a/drivers/block/loop.c
+++ b/drivers/block/loop.c
@@ -544,7 +544,7 @@ static int do_req_filebacked(struct loop_device *lo, struct request *rq)
if (op_is_write(req_op(rq))) {
if (rq->cmd_flags & REQ_FLUSH)
ret = lo_req_flush(lo, rq);
- else if (rq->cmd_flags & REQ_DISCARD)
+ else if (req_op(rq) == REQ_OP_DISCARD)
ret = lo_discard(lo, rq, pos);
else if (lo->transfer)
ret = lo_write_transfer(lo, rq, pos);
@@ -1659,8 +1659,8 @@ static int loop_queue_rq(struct blk_mq_hw_ctx *hctx,
if (lo->lo_state != Lo_bound)
return -EIO;

- if (lo->use_dio && !(cmd->rq->cmd_flags & (REQ_FLUSH |
- REQ_DISCARD)))
+ if (lo->use_dio && (!(cmd->rq->cmd_flags & REQ_FLUSH) ||
+ req_op(cmd->rq) == REQ_OP_DISCARD))
cmd->use_aio = true;
else
cmd->use_aio = false;
diff --git a/drivers/block/mtip32xx/mtip32xx.c b/drivers/block/mtip32xx/mtip32xx.c
index 6053e46..8e3e708 100644
--- a/drivers/block/mtip32xx/mtip32xx.c
+++ b/drivers/block/mtip32xx/mtip32xx.c
@@ -3765,7 +3765,7 @@ static int mtip_submit_request(struct blk_mq_hw_ctx *hctx, struct request *rq)
return -ENODATA;
}

- if (rq->cmd_flags & REQ_DISCARD) {
+ if (req_op(rq) == REQ_OP_DISCARD) {
int err;

err = mtip_send_trim(dd, blk_rq_pos(rq), blk_rq_sectors(rq));
diff --git a/drivers/block/nbd.c b/drivers/block/nbd.c
index 31e73a7..6c2c28d 100644
--- a/drivers/block/nbd.c
+++ b/drivers/block/nbd.c
@@ -282,7 +282,7 @@ static int nbd_send_req(struct nbd_device *nbd, struct request *req)

if (req->cmd_type == REQ_TYPE_DRV_PRIV)
type = NBD_CMD_DISC;
- else if (req->cmd_flags & REQ_DISCARD)
+ else if (req_op(req) == REQ_OP_DISCARD)
type = NBD_CMD_TRIM;
else if (req->cmd_flags & REQ_FLUSH)
type = NBD_CMD_FLUSH;
diff --git a/drivers/block/rbd.c b/drivers/block/rbd.c
index 81666a5..4506620 100644
--- a/drivers/block/rbd.c
+++ b/drivers/block/rbd.c
@@ -3286,9 +3286,9 @@ static void rbd_queue_workfn(struct work_struct *work)
goto err;
}

- if (rq->cmd_flags & REQ_DISCARD)
+ if (req_op(rq) == REQ_OP_DISCARD)
op_type = OBJ_OP_DISCARD;
- else if (rq->cmd_flags & REQ_WRITE)
+ else if (req_op(rq) == REQ_OP_WRITE)
op_type = OBJ_OP_WRITE;
else
op_type = OBJ_OP_READ;
diff --git a/drivers/block/xen-blkfront.c b/drivers/block/xen-blkfront.c
index 52963a2..6fd1601 100644
--- a/drivers/block/xen-blkfront.c
+++ b/drivers/block/xen-blkfront.c
@@ -844,7 +844,8 @@ static int blkif_queue_request(struct request *req, struct blkfront_ring_info *r
if (unlikely(rinfo->dev_info->connected != BLKIF_STATE_CONNECTED))
return 1;

- if (unlikely(req->cmd_flags & (REQ_DISCARD | REQ_SECURE)))
+ if (unlikely(req_op(req) == REQ_OP_DISCARD ||
+ req->cmd_flags & REQ_SECURE))
return blkif_queue_discard_req(req, rinfo);
else
return blkif_queue_rw_req(req, rinfo);
@@ -2054,8 +2055,9 @@ static int blkif_recover(struct blkfront_info *info)
/*
* Get the bios in the request so we can re-queue them.
*/
- if (copy[i].request->cmd_flags &
- (REQ_FLUSH | REQ_FUA | REQ_DISCARD | REQ_SECURE)) {
+ if (copy[i].request->cmd_flags & REQ_FLUSH ||
+ req_op(copy[i].request) == REQ_OP_DISCARD ||
+ copy[i].request->cmd_flags & (REQ_FUA | REQ_SECURE)) {
/*
* Flush operations don't contain bios, so
* we need to requeue the whole request
diff --git a/drivers/ide/ide-floppy.c b/drivers/ide/ide-floppy.c
index 2fb5350..f079d8d 100644
--- a/drivers/ide/ide-floppy.c
+++ b/drivers/ide/ide-floppy.c
@@ -206,7 +206,7 @@ static void idefloppy_create_rw_cmd(ide_drive_t *drive,
memcpy(rq->cmd, pc->c, 12);

pc->rq = rq;
- if (rq->cmd_flags & REQ_WRITE)
+ if (cmd == WRITE)
pc->flags |= PC_FLAG_WRITING;

pc->flags |= PC_FLAG_DMA_OK;
diff --git a/drivers/md/dm.c b/drivers/md/dm.c
index 9204a2d..f6b104c 100644
--- a/drivers/md/dm.c
+++ b/drivers/md/dm.c
@@ -1322,7 +1322,7 @@ static void dm_done(struct request *clone, int error, bool mapped)
r = rq_end_io(tio->ti, clone, error, &tio->info);
}

- if (unlikely(r == -EREMOTEIO && (clone->cmd_flags & REQ_WRITE_SAME) &&
+ if (unlikely(r == -EREMOTEIO && (req_op(clone) == REQ_OP_WRITE_SAME) &&
!clone->q->limits.max_write_same_sectors))
disable_write_same(tio->md);

diff --git a/drivers/mmc/card/block.c b/drivers/mmc/card/block.c
index e62fde3..201a871 100644
--- a/drivers/mmc/card/block.c
+++ b/drivers/mmc/card/block.c
@@ -1722,8 +1722,7 @@ static u8 mmc_blk_prep_packed_list(struct mmc_queue *mq, struct request *req)
!IS_ALIGNED(blk_rq_sectors(next), 8))
break;

- if (next->cmd_flags & REQ_DISCARD ||
- next->cmd_flags & REQ_FLUSH)
+ if (req_op(next) == REQ_OP_DISCARD || next->cmd_flags & REQ_FLUSH)
break;

if (rq_data_dir(cur) != rq_data_dir(next))
@@ -2164,7 +2163,7 @@ static int mmc_blk_issue_rq(struct mmc_queue *mq, struct request *req)
}

mq->flags &= ~MMC_QUEUE_NEW_REQUEST;
- if (cmd_flags & REQ_DISCARD) {
+ if (req && req_op(req) == REQ_OP_DISCARD) {
/* complete ongoing async transfer before issuing discard */
if (card->host->areq)
mmc_blk_issue_rw_rq(mq, NULL);
@@ -2188,7 +2187,7 @@ static int mmc_blk_issue_rq(struct mmc_queue *mq, struct request *req)

out:
if ((!req && !(mq->flags & MMC_QUEUE_NEW_REQUEST)) ||
- (cmd_flags & MMC_REQ_SPECIAL_MASK))
+ mmc_req_is_special(req))
/*
* Release host when there are no more requests
* and after special request(discard, flush) is done.
diff --git a/drivers/mmc/card/queue.c b/drivers/mmc/card/queue.c
index 6f4323c..c2d5f6f 100644
--- a/drivers/mmc/card/queue.c
+++ b/drivers/mmc/card/queue.c
@@ -33,7 +33,7 @@ static int mmc_prep_request(struct request_queue *q, struct request *req)
/*
* We only like normal block requests and discards.
*/
- if (req->cmd_type != REQ_TYPE_FS && !(req->cmd_flags & REQ_DISCARD)) {
+ if (req->cmd_type != REQ_TYPE_FS && req_op(req) != REQ_OP_DISCARD) {
blk_dump_rq_flags(req, "MMC bad request");
return BLKPREP_KILL;
}
@@ -56,7 +56,6 @@ static int mmc_queue_thread(void *d)
down(&mq->thread_sem);
do {
struct request *req = NULL;
- unsigned int cmd_flags = 0;

spin_lock_irq(q->queue_lock);
set_current_state(TASK_INTERRUPTIBLE);
@@ -66,7 +65,6 @@ static int mmc_queue_thread(void *d)

if (req || mq->mqrq_prev->req) {
set_current_state(TASK_RUNNING);
- cmd_flags = req ? req->cmd_flags : 0;
mq->issue_fn(mq, req);
cond_resched();
if (mq->flags & MMC_QUEUE_NEW_REQUEST) {
@@ -81,7 +79,7 @@ static int mmc_queue_thread(void *d)
* has been finished. Do not assign it to previous
* request.
*/
- if (cmd_flags & MMC_REQ_SPECIAL_MASK)
+ if (mmc_req_is_special(req))
mq->mqrq_cur->req = NULL;

mq->mqrq_prev->brq.mrq.data = NULL;
diff --git a/drivers/mmc/card/queue.h b/drivers/mmc/card/queue.h
index 36cddab..9fb26f2 100644
--- a/drivers/mmc/card/queue.h
+++ b/drivers/mmc/card/queue.h
@@ -1,7 +1,10 @@
#ifndef MMC_QUEUE_H
#define MMC_QUEUE_H

-#define MMC_REQ_SPECIAL_MASK (REQ_DISCARD | REQ_FLUSH)
+static inline bool mmc_req_is_special(struct request *req)
+{
+ return req && (req->cmd_flags & REQ_FLUSH || req_op(req) == REQ_OP_DISCARD);
+}

struct request;
struct task_struct;
diff --git a/drivers/mtd/mtd_blkdevs.c b/drivers/mtd/mtd_blkdevs.c
index 74ae243..4eb9a5f 100644
--- a/drivers/mtd/mtd_blkdevs.c
+++ b/drivers/mtd/mtd_blkdevs.c
@@ -94,7 +94,7 @@ static int do_blktrans_request(struct mtd_blktrans_ops *tr,
get_capacity(req->rq_disk))
return -EIO;

- if (req->cmd_flags & REQ_DISCARD)
+ if (req_op(req) == REQ_OP_DISCARD)
return tr->discard(dev, block, nsect);

if (rq_data_dir(req) == READ) {
diff --git a/drivers/nvme/host/core.c b/drivers/nvme/host/core.c
index 1a51584..089b8b8 100644
--- a/drivers/nvme/host/core.c
+++ b/drivers/nvme/host/core.c
@@ -292,7 +292,7 @@ int nvme_setup_cmd(struct nvme_ns *ns, struct request *req,
memcpy(cmd, req->cmd, sizeof(*cmd));
else if (req->cmd_flags & REQ_FLUSH)
nvme_setup_flush(ns, cmd);
- else if (req->cmd_flags & REQ_DISCARD)
+ else if (req_op(req) == REQ_OP_DISCARD)
ret = nvme_setup_discard(ns, req, cmd);
else
nvme_setup_rw(ns, req, cmd);
diff --git a/drivers/nvme/host/nvme.h b/drivers/nvme/host/nvme.h
index 1daa048..4d196d2 100644
--- a/drivers/nvme/host/nvme.h
+++ b/drivers/nvme/host/nvme.h
@@ -177,7 +177,7 @@ static inline u64 nvme_block_nr(struct nvme_ns *ns, sector_t sector)

static inline unsigned nvme_map_len(struct request *rq)
{
- if (rq->cmd_flags & REQ_DISCARD)
+ if (req_op(rq) == REQ_OP_DISCARD)
return sizeof(struct nvme_dsm_range);
else
return blk_rq_bytes(rq);
@@ -185,7 +185,7 @@ static inline unsigned nvme_map_len(struct request *rq)

static inline void nvme_cleanup_cmd(struct request *req)
{
- if (req->cmd_flags & REQ_DISCARD)
+ if (req_op(req) == REQ_OP_DISCARD)
kfree(req->completion_data);
}

diff --git a/drivers/scsi/sd.c b/drivers/scsi/sd.c
index f459dff..c8dc221 100644
--- a/drivers/scsi/sd.c
+++ b/drivers/scsi/sd.c
@@ -1012,7 +1012,8 @@ static int sd_setup_read_write_cmnd(struct scsi_cmnd *SCpnt)
} else if (rq_data_dir(rq) == READ) {
SCpnt->cmnd[0] = READ_6;
} else {
- scmd_printk(KERN_ERR, SCpnt, "Unknown command %llx\n", (unsigned long long) rq->cmd_flags);
+ scmd_printk(KERN_ERR, SCpnt, "Unknown command %d,%llx\n",
+ req_op(rq), (unsigned long long) rq->cmd_flags);
goto out;
}

@@ -1137,21 +1138,27 @@ static int sd_init_command(struct scsi_cmnd *cmd)
{
struct request *rq = cmd->request;

- if (rq->cmd_flags & REQ_DISCARD)
+ switch (req_op(rq)) {
+ case REQ_OP_DISCARD:
return sd_setup_discard_cmnd(cmd);
- else if (rq->cmd_flags & REQ_WRITE_SAME)
+ case REQ_OP_WRITE_SAME:
return sd_setup_write_same_cmnd(cmd);
- else if (rq->cmd_flags & REQ_FLUSH)
- return sd_setup_flush_cmnd(cmd);
- else
- return sd_setup_read_write_cmnd(cmd);
+ case REQ_OP_READ:
+ case REQ_OP_WRITE:
+ if (rq->cmd_flags & REQ_FLUSH)
+ return sd_setup_flush_cmnd(cmd);
+ else
+ return sd_setup_read_write_cmnd(cmd);
+ default:
+ BUG();
+ }
}

static void sd_uninit_command(struct scsi_cmnd *SCpnt)
{
struct request *rq = SCpnt->request;

- if (rq->cmd_flags & REQ_DISCARD)
+ if (req_op(rq) == REQ_OP_DISCARD)
__free_page(rq->completion_data);

if (SCpnt->cmnd != rq->cmd) {
@@ -1774,7 +1781,7 @@ static int sd_done(struct scsi_cmnd *SCpnt)
unsigned char op = SCpnt->cmnd[0];
unsigned char unmap = SCpnt->cmnd[1] & 8;

- if (req->cmd_flags & REQ_DISCARD || req->cmd_flags & REQ_WRITE_SAME) {
+ if (req_op(req) == REQ_OP_DISCARD || req_op(req) == REQ_OP_WRITE_SAME) {
if (!result) {
good_bytes = blk_rq_bytes(req);
scsi_set_resid(SCpnt, 0);