From fdce58ccb5df621695b079378c619046acabc778 Mon Sep 17 00:00:00 2001 From: Alex Elder Date: Thu, 14 Mar 2013 14:09:06 -0500 Subject: [PATCH] libceph: record length of bio list with bio When assigning a bio pointer to an osd request, we don't have an efficient way of knowing the total length bytes in the bio list. That information is available at the point it's set up by the rbd code, so record it with the osd data when it's set. This and the next patch are related to maintaining the length of a message's data independent of the message header, as described here: http://tracker.ceph.com/issues/4589 Signed-off-by: Alex Elder Reviewed-by: Josh Durgin --- drivers/block/rbd.c | 1 + include/linux/ceph/osd_client.h | 5 ++++- 2 files changed, 5 insertions(+), 1 deletion(-) diff --git a/drivers/block/rbd.c b/drivers/block/rbd.c index f04d45b6b563..e95a92e89330 100644 --- a/drivers/block/rbd.c +++ b/drivers/block/rbd.c @@ -1352,6 +1352,7 @@ static struct ceph_osd_request *rbd_osd_req_create( rbd_assert(obj_request->bio_list != NULL); osd_data->type = CEPH_OSD_DATA_TYPE_BIO; osd_data->bio = obj_request->bio_list; + osd_data->bio_length = obj_request->length; break; case OBJ_REQUEST_PAGES: osd_data->type = CEPH_OSD_DATA_TYPE_PAGES; diff --git a/include/linux/ceph/osd_client.h b/include/linux/ceph/osd_client.h index 3b5ba31c2cbd..fdda93ebbb4c 100644 --- a/include/linux/ceph/osd_client.h +++ b/include/linux/ceph/osd_client.h @@ -71,7 +71,10 @@ struct ceph_osd_data { }; struct ceph_pagelist *pagelist; #ifdef CONFIG_BLOCK - struct bio *bio; + struct { + struct bio *bio; /* list of bios */ + size_t bio_length; /* total in list */ + }; #endif /* CONFIG_BLOCK */ }; };