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rbd: kill rbd_req_coll and rbd_request 

The two remaining callers of rbd_do_request() always pass a null
collection pointer, so the "coll" and "coll_index" parameters are
not needed.  There is no other use of that data structure, so it
can be eliminated.

Deleting them means there is no need to allocate a rbd_request
structure for the callback function.  And since that's the only use
of *that* structure, it too can be eliminated.

Signed-off-by: Alex Elder <elder@inktank.com>
Reviewed-by: Josh Durgin <josh.durgin@inktank.com>
This commit is contained in:
Alex Elder 2012-11-30 17:53:04 -06:00 committed by Sage Weil
parent 2250a71b59
commit 7d250b949a
1 changed files with 3 additions and 55 deletions
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58
drivers/block/rbd.c
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@ -162,25 +162,6 @@ struct rbd_client {
struct list_head node;
};
/*
* a request completion status
*/
struct rbd_req_status {
int done;
s32 rc;
u64 bytes;
};
/*
* a collection of requests
*/
struct rbd_req_coll {
int total;
int num_done;
struct kref kref;
struct rbd_req_status status[0];
};
struct rbd_img_request;
typedef void (*rbd_img_callback_t)(struct rbd_img_request *);
@ -242,18 +223,6 @@ struct rbd_img_request {
#define for_each_obj_request_safe(ireq, oreq, n) \
list_for_each_entry_safe_reverse(oreq, n, &ireq->obj_requests, links)
/*
* a single io request
*/
struct rbd_request {
struct request *rq; /* blk layer request */
struct bio *bio; /* cloned bio */
struct page **pages; /* list of used pages */
u64 len;
int coll_index;
struct rbd_req_coll *coll;
};
struct rbd_snap {
struct device dev;
const char *name;
@ -1195,21 +1164,18 @@ static int rbd_do_request(struct request *rq,
int num_pages,
int flags,
struct ceph_osd_req_op *op,
struct rbd_req_coll *coll,
int coll_index,
void (*rbd_cb)(struct ceph_osd_request *,
struct ceph_msg *),
u64 *ver)
{
struct ceph_osd_client *osdc;
struct ceph_osd_request *osd_req;
struct rbd_request *rbd_req = NULL;
struct timespec mtime = CURRENT_TIME;
int ret;
dout("rbd_do_request object_name=%s ofs=%llu len=%llu coll=%p[%d]\n",
dout("rbd_do_request object_name=%s ofs=%llu len=%llu\n",
object_name, (unsigned long long) ofs,
(unsigned long long) len, coll, coll_index);
(unsigned long long) len);
osdc = &rbd_dev->rbd_client->client->osdc;
osd_req = ceph_osdc_alloc_request(osdc, snapc, 1, false, GFP_NOIO);
@ -1223,22 +1189,8 @@ static int rbd_do_request(struct request *rq,
bio_get(osd_req->r_bio);
}
if (coll) {
ret = -ENOMEM;
rbd_req = kmalloc(sizeof(*rbd_req), GFP_NOIO);
if (!rbd_req)
goto done_osd_req;
rbd_req->rq = rq;
rbd_req->bio = bio;
rbd_req->pages = pages;
rbd_req->len = len;
rbd_req->coll = coll;
rbd_req->coll_index = coll_index;
}
osd_req->r_callback = rbd_cb;
osd_req->r_priv = rbd_req;
osd_req->r_priv = NULL;
strncpy(osd_req->r_oid, object_name, sizeof(osd_req->r_oid));
osd_req->r_oid_len = strlen(osd_req->r_oid);
@ -1274,8 +1226,6 @@ static int rbd_do_request(struct request *rq,
done_err:
if (bio)
bio_chain_put(osd_req->r_bio);
kfree(rbd_req);
done_osd_req:
ceph_osdc_put_request(osd_req);
return ret;
@ -1314,7 +1264,6 @@ static int rbd_req_sync_op(struct rbd_device *rbd_dev,
pages, num_pages,
flags,
op,
NULL, 0,
NULL,
ver);
if (ret < 0)
@ -1390,7 +1339,6 @@ static int rbd_req_sync_notify_ack(struct rbd_device *rbd_dev,
NULL, 0,
CEPH_OSD_FLAG_READ,
op,
NULL, 0,
rbd_simple_req_cb, NULL);
rbd_osd_req_op_destroy(op);