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rbd: assume single op in a request

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We now know that every of rbd_req_sync_op() passes an array of
exactly one operation, as evidenced by all callers passing 1 as its
num_op argument.  So get rid of that argument, assuming a single op.

Similarly, we now know that all callers of rbd_do_request() pass 1
as the num_op value, so that parameter can be eliminated as well.

Signed-off-by: Alex Elder <elder@inktank.com>
Reviewed-by: Josh Durgin <josh.durgin@inktank.com>
This commit is contained in:
Alex Elder 2012-11-13 21:11:15 -06:00
parent 139b4318ad
commit 30573d6803
1 changed files with 13 additions and 15 deletions
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28
drivers/block/rbd.c
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@ -1113,8 +1113,7 @@ static int rbd_do_request(struct request *rq,
struct page **pages,
int num_pages,
int flags,
unsigned int num_op,
struct ceph_osd_req_op *ops,
struct ceph_osd_req_op *op,
struct rbd_req_coll *coll,
int coll_index,
void (*rbd_cb)(struct ceph_osd_request *,
@ -1143,7 +1142,7 @@ static int rbd_do_request(struct request *rq,
(unsigned long long) len, coll, coll_index);
osdc = &rbd_dev->rbd_client->client->osdc;
osd_req = ceph_osdc_alloc_request(osdc, snapc, num_op, false, GFP_NOIO);
osd_req = ceph_osdc_alloc_request(osdc, snapc, 1, false, GFP_NOIO);
if (!osd_req) {
ret = -ENOMEM;
goto done_pages;
@ -1169,10 +1168,10 @@ static int rbd_do_request(struct request *rq,
rbd_layout_init(&osd_req->r_file_layout, rbd_dev->spec->pool_id);
ret = ceph_calc_raw_layout(&osd_req->r_file_layout,
ofs, &len, &bno, osd_req, ops);
ofs, &len, &bno, osd_req, op);
rbd_assert(ret == 0);
ceph_osdc_build_request(osd_req, ofs, len, num_op, ops,
ceph_osdc_build_request(osd_req, ofs, len, 1, op,
snapc, snapid, &mtime);
if (linger_req) {
@ -1255,8 +1254,7 @@ static void rbd_simple_req_cb(struct ceph_osd_request *osd_req,
*/
static int rbd_req_sync_op(struct rbd_device *rbd_dev,
int flags,
unsigned int num_op,
struct ceph_osd_req_op *ops,
struct ceph_osd_req_op *op,
const char *object_name,
u64 ofs, u64 inbound_size,
char *inbound,
@ -1267,7 +1265,7 @@ static int rbd_req_sync_op(struct rbd_device *rbd_dev,
struct page **pages;
int num_pages;
rbd_assert(ops != NULL);
rbd_assert(op != NULL);
num_pages = calc_pages_for(ofs, inbound_size);
pages = ceph_alloc_page_vector(num_pages, GFP_KERNEL);
@ -1278,7 +1276,7 @@ static int rbd_req_sync_op(struct rbd_device *rbd_dev,
object_name, ofs, inbound_size, NULL,
pages, num_pages,
flags,
num_op, ops,
op,
NULL, 0,
NULL,
linger_req, ver);
@ -1348,7 +1346,7 @@ static int rbd_do_op(struct request *rq,
bio,
NULL, 0,
flags,
1, op,
op,
coll, coll_index,
rbd_req_cb, 0, NULL);
if (ret < 0)
@ -1377,7 +1375,7 @@ static int rbd_req_sync_read(struct rbd_device *rbd_dev,
return -ENOMEM;
ret = rbd_req_sync_op(rbd_dev, CEPH_OSD_FLAG_READ,
1, op, object_name, ofs, len, buf, NULL, ver);
op, object_name, ofs, len, buf, NULL, ver);
rbd_destroy_op(op);
return ret;
@ -1405,7 +1403,7 @@ static int rbd_req_sync_notify_ack(struct rbd_device *rbd_dev,
rbd_dev->header_name, 0, 0, NULL,
NULL, 0,
CEPH_OSD_FLAG_READ,
1, op,
op,
NULL, 0,
rbd_simple_req_cb, 0, NULL);
@ -1457,7 +1455,7 @@ static int rbd_req_sync_watch(struct rbd_device *rbd_dev)
ret = rbd_req_sync_op(rbd_dev,
CEPH_OSD_FLAG_WRITE | CEPH_OSD_FLAG_ONDISK,
1, op,
op,
rbd_dev->header_name,
0, 0, NULL,
&rbd_dev->watch_request, NULL);
@ -1494,7 +1492,7 @@ static int rbd_req_sync_unwatch(struct rbd_device *rbd_dev)
ret = rbd_req_sync_op(rbd_dev,
CEPH_OSD_FLAG_WRITE | CEPH_OSD_FLAG_ONDISK,
1, op,
op,
rbd_dev->header_name,
0, 0, NULL, NULL, NULL);
@ -1545,7 +1543,7 @@ static int rbd_req_sync_exec(struct rbd_device *rbd_dev,
op->cls.indata = outbound;
op->cls.indata_len = outbound_size;
ret = rbd_req_sync_op(rbd_dev, CEPH_OSD_FLAG_READ, 1, op,
ret = rbd_req_sync_op(rbd_dev, CEPH_OSD_FLAG_READ, op,
object_name, 0, inbound_size, inbound,
NULL, ver);