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target: use bio op accessors
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Separate the op from the rq_flag_bits and have the target layer
set/get the bio using bio_set_op_attrs/bio_op.

Signed-off-by: Mike Christie <mchristi@redhat.com>
Reviewed-by: Hannes Reinecke <hare@suse.com>
Signed-off-by: Jens Axboe <axboe@fb.com>
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Mike Christie authored and Jens Axboe committed Jun 7, 2016
1 parent 796a5cf commit e742fc3
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Showing 2 changed files with 15 additions and 16 deletions.
29 changes: 14 additions & 15 deletions drivers/target/target_core_iblock.c
View file
Original file line number Diff line number Diff line change
Expand Up @@ -312,7 +312,8 @@ static void iblock_bio_done(struct bio *bio)
}

static struct bio *
iblock_get_bio(struct se_cmd *cmd, sector_t lba, u32 sg_num, int rw)
iblock_get_bio(struct se_cmd *cmd, sector_t lba, u32 sg_num, int op,
int op_flags)
{
struct iblock_dev *ib_dev = IBLOCK_DEV(cmd->se_dev);
struct bio *bio;
Expand All @@ -334,7 +335,7 @@ iblock_get_bio(struct se_cmd *cmd, sector_t lba, u32 sg_num, int rw)
bio->bi_private = cmd;
bio->bi_end_io = &iblock_bio_done;
bio->bi_iter.bi_sector = lba;
bio->bi_rw = rw;
bio_set_op_attrs(bio, op, op_flags);

return bio;
}
Expand Down Expand Up @@ -480,7 +481,7 @@ iblock_execute_write_same(struct se_cmd *cmd)
goto fail;
cmd->priv = ibr;

bio = iblock_get_bio(cmd, block_lba, 1, WRITE);
bio = iblock_get_bio(cmd, block_lba, 1, REQ_OP_WRITE, 0);
if (!bio)
goto fail_free_ibr;

Expand All @@ -493,7 +494,8 @@ iblock_execute_write_same(struct se_cmd *cmd)
while (bio_add_page(bio, sg_page(sg), sg->length, sg->offset)
!= sg->length) {

bio = iblock_get_bio(cmd, block_lba, 1, WRITE);
bio = iblock_get_bio(cmd, block_lba, 1, REQ_OP_WRITE,
0);
if (!bio)
goto fail_put_bios;

Expand Down Expand Up @@ -679,8 +681,7 @@ iblock_execute_rw(struct se_cmd *cmd, struct scatterlist *sgl, u32 sgl_nents,
struct scatterlist *sg;
u32 sg_num = sgl_nents;
unsigned bio_cnt;
int rw = 0;
int i;
int i, op, op_flags = 0;

if (data_direction == DMA_TO_DEVICE) {
struct iblock_dev *ib_dev = IBLOCK_DEV(dev);
Expand All @@ -689,18 +690,15 @@ iblock_execute_rw(struct se_cmd *cmd, struct scatterlist *sgl, u32 sgl_nents,
* Force writethrough using WRITE_FUA if a volatile write cache
* is not enabled, or if initiator set the Force Unit Access bit.
*/
op = REQ_OP_WRITE;
if (test_bit(QUEUE_FLAG_FUA, &q->queue_flags)) {
if (cmd->se_cmd_flags & SCF_FUA)
rw = WRITE_FUA;
op_flags = WRITE_FUA;
else if (!test_bit(QUEUE_FLAG_WC, &q->queue_flags))
rw = WRITE_FUA;
else
rw = WRITE;
} else {
rw = WRITE;
op_flags = WRITE_FUA;
}
} else {
rw = READ;
op = REQ_OP_READ;
}

ibr = kzalloc(sizeof(struct iblock_req), GFP_KERNEL);
Expand All @@ -714,7 +712,7 @@ iblock_execute_rw(struct se_cmd *cmd, struct scatterlist *sgl, u32 sgl_nents,
return 0;
}

bio = iblock_get_bio(cmd, block_lba, sgl_nents, rw);
bio = iblock_get_bio(cmd, block_lba, sgl_nents, op, op_flags);
if (!bio)
goto fail_free_ibr;

Expand All @@ -738,7 +736,8 @@ iblock_execute_rw(struct se_cmd *cmd, struct scatterlist *sgl, u32 sgl_nents,
bio_cnt = 0;
}

bio = iblock_get_bio(cmd, block_lba, sg_num, rw);
bio = iblock_get_bio(cmd, block_lba, sg_num, op,
op_flags);
if (!bio)
goto fail_put_bios;

Expand Down
2 changes: 1 addition & 1 deletion drivers/target/target_core_pscsi.c
View file
Original file line number Diff line number Diff line change
Expand Up @@ -922,7 +922,7 @@ pscsi_map_sg(struct se_cmd *cmd, struct scatterlist *sgl, u32 sgl_nents,
goto fail;

if (rw)
bio->bi_rw |= REQ_WRITE;
bio_set_op_attrs(bio, REQ_OP_WRITE, 0);

pr_debug("PSCSI: Allocated bio: %p,"
" dir: %s nr_vecs: %d\n", bio,
Expand Down

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