| Message ID | 50087770.6060307@inktank.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
diff --git a/drivers/block/rbd.c b/drivers/block/rbd.c index 0535612..6279186 100644 --- a/drivers/block/rbd.c +++ b/drivers/block/rbd.c @@ -1013,9 +1013,8 @@ static void rbd_simple_req_cb(struct ceph_osd_request *req, struct ceph_msg *msg static int rbd_req_sync_op(struct rbd_device *rbd_dev, struct ceph_snap_context *snapc, u64 snapid, - int opcode, int flags, - struct ceph_osd_req_op *orig_ops, + struct ceph_osd_req_op *ops, const char *object_name, u64 ofs, u64 len,
All of the callers of rbd_req_sync_op() except one pass a non-null "ops" pointer. The only one that does not is rbd_req_sync_read(), which passes CEPH_OSD_OP_READ as its "opcode" and, CEPH_OSD_FLAG_READ for "flags". By allocating the ops array in rbd_req_sync_read() and moving the special case code for the null ops pointer into it, it becomes clear that much of that code is not even necessary. In addition, the "opcode" argument to rbd_req_sync_op() is never actually used, so get rid of that. Signed-off-by: Alex Elder <elder@inktank.com> --- drivers/block/rbd.c | 46 ++++++++++++++++------------------------------ 1 files changed, 16 insertions(+), 30 deletions(-) char *buf, @@ -1025,28 +1024,14 @@ static int rbd_req_sync_op(struct rbd_device *rbd_dev, int ret; struct page **pages; int num_pages; - struct ceph_osd_req_op *ops = orig_ops; - u32 payload_len; + + BUG_ON(ops == NULL); num_pages = calc_pages_for(ofs , len); pages = ceph_alloc_page_vector(num_pages, GFP_KERNEL); if (IS_ERR(pages)) return PTR_ERR(pages); - if (!orig_ops) { - payload_len = (flags & CEPH_OSD_FLAG_WRITE ? len : 0); - ret = -ENOMEM; - ops = rbd_create_rw_ops(1, opcode, payload_len); - if (!ops) - goto done; - - if ((flags & CEPH_OSD_FLAG_WRITE) && buf) { - ret = ceph_copy_to_page_vector(pages, buf, ofs, len); - if (ret < 0) - goto done_ops; - } - } - ret = rbd_do_request(NULL, rbd_dev, snapc, snapid, object_name, ofs, len, NULL, pages, num_pages, @@ -1056,14 +1041,11 @@ static int rbd_req_sync_op(struct rbd_device *rbd_dev, NULL, linger_req, ver); if (ret < 0) - goto done_ops; + goto done; if ((flags & CEPH_OSD_FLAG_READ) && buf) ret = ceph_copy_from_page_vector(pages, buf, ofs, ret); -done_ops: - if (!orig_ops) - rbd_destroy_ops(ops); done: ceph_release_page_vector(pages, num_pages); return ret; @@ -1170,12 +1152,20 @@ static int rbd_req_sync_read(struct rbd_device *rbd_dev, char *buf, u64 *ver) { - return rbd_req_sync_op(rbd_dev, NULL, + struct ceph_osd_req_op *ops; + int ret; + + ops = rbd_create_rw_ops(1, CEPH_OSD_OP_READ, 0); + if (!ops) + return -ENOMEM; + + ret = rbd_req_sync_op(rbd_dev, NULL, snapid, - CEPH_OSD_OP_READ, CEPH_OSD_FLAG_READ, - NULL, - object_name, ofs, len, buf, NULL, ver); + ops, object_name, ofs, len, buf, NULL, ver); + rbd_destroy_ops(ops); + + return ret; } /* @@ -1257,7 +1247,6 @@ static int rbd_req_sync_watch(struct rbd_device *rbd_dev, ret = rbd_req_sync_op(rbd_dev, NULL, CEPH_NOSNAP, - 0, CEPH_OSD_FLAG_WRITE | CEPH_OSD_FLAG_ONDISK, ops, object_name, 0, 0, NULL, @@ -1296,7 +1285,6 @@ static int rbd_req_sync_unwatch(struct rbd_device *rbd_dev, ret = rbd_req_sync_op(rbd_dev, NULL, CEPH_NOSNAP, - 0, CEPH_OSD_FLAG_WRITE | CEPH_OSD_FLAG_ONDISK, ops, object_name, 0, 0, NULL, NULL, NULL); @@ -1353,7 +1341,6 @@ static int rbd_req_sync_notify(struct rbd_device *rbd_dev, ret = rbd_req_sync_op(rbd_dev, NULL, CEPH_NOSNAP, - 0, CEPH_OSD_FLAG_WRITE | CEPH_OSD_FLAG_ONDISK, ops, object_name, 0, 0, NULL, NULL, NULL); @@ -1402,7 +1389,6 @@ static int rbd_req_sync_exec(struct rbd_device *rbd_dev, ret = rbd_req_sync_op(rbd_dev, NULL, CEPH_NOSNAP, - 0, CEPH_OSD_FLAG_WRITE | CEPH_OSD_FLAG_ONDISK, ops, object_name, 0, 0, NULL, NULL, NULL);