[PATCH 27/35] drivers: set request op to REQ_OP

From: mchristi
Date: Mon Jan 11 2016 - 15:29:15 EST

From: Mike Christie <mchristi@xxxxxxxxxx>

This patch has the block driver use the request->op for REQ_OP
operations and cmd_flags for rq_flag_bits.

I have only tested scsi and rbd.

Signed-off-by: Mike Christie <mchristi@xxxxxxxxxx>
---
drivers/block/loop.c | 6 +++---
drivers/block/mtip32xx/mtip32xx.c | 2 +-
drivers/block/nbd.c | 2 +-
drivers/block/rbd.c | 2 +-
drivers/block/skd_main.c | 11 ++++-------
drivers/block/xen-blkfront.c | 8 +++++---
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/pci.c | 4 ++--
drivers/scsi/sd.c | 25 ++++++++++++++++---------
13 files changed, 44 insertions(+), 38 deletions(-)

diff --git a/drivers/block/loop.c b/drivers/block/loop.c
index 423f4ca..e771bab 100644
--- a/drivers/block/loop.c
+++ b/drivers/block/loop.c
@@ -538,7 +538,7 @@ static int do_req_filebacked(struct loop_device *lo, struct request *rq)
if (rq->cmd_flags & REQ_WRITE) {
if (rq->cmd_flags & REQ_FLUSH)
ret = lo_req_flush(lo, rq);
- else if (rq->cmd_flags & REQ_DISCARD)
+ else if (rq->op == REQ_OP_DISCARD)
ret = lo_discard(lo, rq, pos);
else if (lo->transfer)
ret = lo_write_transfer(lo, rq, pos);
@@ -1653,8 +1653,8 @@ 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) ||
+ cmd->rq->op == 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 9b180db..3995a9e 100644
--- a/drivers/block/mtip32xx/mtip32xx.c
+++ b/drivers/block/mtip32xx/mtip32xx.c
@@ -3670,7 +3670,7 @@ static int mtip_submit_request(struct blk_mq_hw_ctx *hctx, struct request *rq)
return -ENXIO;
}

- if (rq->cmd_flags & REQ_DISCARD) {
+ if (rq->op == 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 e4c5cc1..dd8f3e9 100644
--- a/drivers/block/nbd.c
+++ b/drivers/block/nbd.c
@@ -242,7 +242,7 @@ 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_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 81ea69f..ea326ef 100644
--- a/drivers/block/rbd.c
+++ b/drivers/block/rbd.c
@@ -3373,7 +3373,7 @@ static void rbd_queue_workfn(struct work_struct *work)
goto err;
}

- if (rq->cmd_flags & REQ_DISCARD)
+ if (rq->op == REQ_OP_DISCARD)
op_type = OBJ_OP_DISCARD;
else if (rq->cmd_flags & REQ_WRITE)
op_type = OBJ_OP_WRITE;
diff --git a/drivers/block/skd_main.c b/drivers/block/skd_main.c
index 586f916..f89a0c8 100644
--- a/drivers/block/skd_main.c
+++ b/drivers/block/skd_main.c
@@ -576,7 +576,6 @@ static void skd_request_fn(struct request_queue *q)
struct request *req = NULL;
struct skd_scsi_request *scsi_req;
struct page *page;
- unsigned long io_flags;
int error;
u32 lba;
u32 count;
@@ -624,12 +623,11 @@ static void skd_request_fn(struct request_queue *q)
lba = (u32)blk_rq_pos(req);
count = blk_rq_sectors(req);
data_dir = rq_data_dir(req);
- io_flags = req->cmd_flags;

- if (io_flags & REQ_FLUSH)
+ if (req->cmd_flags & REQ_FLUSH)
flush++;

- if (io_flags & REQ_FUA)
+ if (req->cmd_flags & REQ_FUA)
fua++;

pr_debug("%s:%s:%d new req=%p lba=%u(0x%x) "
@@ -735,7 +733,7 @@ static void skd_request_fn(struct request_queue *q)
else
skreq->sg_data_dir = SKD_DATA_DIR_HOST_TO_CARD;

- if (io_flags & REQ_DISCARD) {
+ if (req->op == REQ_OP_DISCARD) {
page = alloc_page(GFP_ATOMIC | __GFP_ZERO);
if (!page) {
pr_err("request_fn:Page allocation failed.\n");
@@ -852,9 +850,8 @@ static void skd_end_request(struct skd_device *skdev,
struct skd_request_context *skreq, int error)
{
struct request *req = skreq->req;
- unsigned int io_flags = req->cmd_flags;

- if ((io_flags & REQ_DISCARD) &&
+ if ((req->op == REQ_OP_DISCARD) &&
(skreq->discard_page == 1)) {
pr_debug("%s:%s:%d, free the page!",
skdev->name, __func__, __LINE__);
diff --git a/drivers/block/xen-blkfront.c b/drivers/block/xen-blkfront.c
index 81444fc..d4aa473 100644
--- a/drivers/block/xen-blkfront.c
+++ b/drivers/block/xen-blkfront.c
@@ -718,7 +718,8 @@ static int blkif_queue_request(struct request *req)
if (unlikely(info->connected != BLKIF_STATE_CONNECTED))
return 1;

- if (unlikely(req->cmd_flags & (REQ_DISCARD | REQ_SECURE)))
+ if (unlikely(req->op == REQ_OP_DISCARD ||
+ req->cmd_flags & REQ_SECURE))
return blkif_queue_discard_req(req);
else
return blkif_queue_rw_req(req);
@@ -1691,8 +1692,9 @@ 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 ||
+ copy[i].request->op == 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/md/dm.c b/drivers/md/dm.c
index b882e56c..0e7ddc4 100644
--- a/drivers/md/dm.c
+++ b/drivers/md/dm.c
@@ -1278,7 +1278,7 @@ 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 && (clone->op == 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 5914263..cc9b1ff 100644
--- a/drivers/mmc/card/block.c
+++ b/drivers/mmc/card/block.c
@@ -1691,8 +1691,7 @@ 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 (next->op == REQ_OP_DISCARD || next->cmd_flags & REQ_FLUSH)
break;

if (rq_data_dir(cur) != rq_data_dir(next))
@@ -2133,7 +2132,7 @@ 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_OP_DISCARD) {
/* complete ongoing async transfer before issuing discard */
if (card->host->areq)
mmc_blk_issue_rw_rq(mq, NULL);
@@ -2157,7 +2156,7 @@ 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..9fb8d21 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_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..f166e5b 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_OP_DISCARD);
+}

struct request;
struct task_struct;
diff --git a/drivers/mtd/mtd_blkdevs.c b/drivers/mtd/mtd_blkdevs.c
index f470118..b2e0bce 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_OP_DISCARD)
return tr->discard(dev, block, nsect);

if (rq_data_dir(req) == READ) {
diff --git a/drivers/nvme/host/pci.c b/drivers/nvme/host/pci.c
index 92fa1a6..c51205a 100644
--- a/drivers/nvme/host/pci.c
+++ b/drivers/nvme/host/pci.c
@@ -347,7 +347,7 @@ static int nvme_init_iod(struct request *rq, struct nvme_dev *dev)
int nseg = rq->nr_phys_segments;
unsigned size;

- if (rq->cmd_flags & REQ_DISCARD)
+ if (rq->op == REQ_OP_DISCARD)
size = sizeof(struct nvme_dsm_range);
else
size = blk_rq_bytes(rq);
@@ -663,7 +663,7 @@ static int nvme_queue_rq(struct blk_mq_hw_ctx *hctx,
if (ret)
return ret;

- if (req->cmd_flags & REQ_DISCARD) {
+ if (req->op == REQ_OP_DISCARD) {
ret = nvme_setup_discard(nvmeq, ns, req, &cmnd);
} else {
if (req->cmd_type == REQ_TYPE_DRV_PRIV)
diff --git a/drivers/scsi/sd.c b/drivers/scsi/sd.c
index 4e08d1cd..f6eda6d 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",
+ rq->op, (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 (rq->op) {
+ 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 (rq->op == REQ_OP_DISCARD)
__free_page(rq->completion_data);

if (SCpnt->cmnd != rq->cmd) {
@@ -1768,7 +1775,7 @@ 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_OP_DISCARD || req->op == REQ_OP_WRITE_SAME) {
if (!result) {
good_bytes = blk_rq_bytes(req);
scsi_set_resid(SCpnt, 0);
--
1.8.3.1