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dm: use op_is_write instead of checking for REQ_WRITE 

We currently set REQ_WRITE/WRITE for all non READ IOs
like discard, flush, writesame, etc. In the next patches where we
no longer set up the op as a bitmap, we will not be able to
detect a operation direction like writesame by testing if REQ_WRITE is
set.

This has dm use the op_is_write helper which will do the right
thing.

Signed-off-by: Mike Christie <mchristi@redhat.com>
Reviewed-by: Hannes Reinecke <hare@suse.com>
Signed-off-by: Jens Axboe <axboe@fb.com>
This commit is contained in:
Mike Christie 2016-06-05 14:31:46 -05:00 committed by Jens Axboe
parent a8ebb056a8
commit 5111166693
2 changed files with 5 additions and 5 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
drivers/md/dm-io.c
View File

@ -409,7 +409,7 @@ static int sync_io(struct dm_io_client *client, unsigned int num_regions,
struct io *io;
struct sync_io sio;
if (num_regions > 1 && (rw & RW_MASK) != WRITE) {
if (num_regions > 1 && !op_is_write(rw)) {
WARN_ON(1);
return -EIO;
}
@ -442,7 +442,7 @@ static int async_io(struct dm_io_client *client, unsigned int num_regions,
{
struct io *io;
if (num_regions > 1 && (rw & RW_MASK) != WRITE) {
if (num_regions > 1 && !op_is_write(rw)) {
WARN_ON(1);
fn(1, context);
return -EIO;

6
drivers/md/dm-kcopyd.c
View File

@ -465,7 +465,7 @@ static void complete_io(unsigned long error, void *context)
io_job_finish(kc->throttle);
if (error) {
if (job->rw & WRITE)
if (op_is_write(job->rw))
job->write_err |= error;
else
job->read_err = 1;
@ -477,7 +477,7 @@ static void complete_io(unsigned long error, void *context)
}
}
if (job->rw & WRITE)
if (op_is_write(job->rw))
push(&kc->complete_jobs, job);
else {
@ -550,7 +550,7 @@ static int process_jobs(struct list_head *jobs, struct dm_kcopyd_client *kc,
if (r < 0) {
/* error this rogue job */
if (job->rw & WRITE)
if (op_is_write(job->rw))
job->write_err = (unsigned long) -1L;
else
job->read_err = 1;