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 <elder@inktank.com> Reviewed-by: Josh Durgin <josh.durgin@inktank.com>
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@ -1352,6 +1352,7 @@ static struct ceph_osd_request *rbd_osd_req_create(
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rbd_assert(obj_request->bio_list != NULL);
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rbd_assert(obj_request->bio_list != NULL);
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osd_data->type = CEPH_OSD_DATA_TYPE_BIO;
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osd_data->type = CEPH_OSD_DATA_TYPE_BIO;
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osd_data->bio = obj_request->bio_list;
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osd_data->bio = obj_request->bio_list;
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osd_data->bio_length = obj_request->length;
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break;
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break;
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case OBJ_REQUEST_PAGES:
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case OBJ_REQUEST_PAGES:
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osd_data->type = CEPH_OSD_DATA_TYPE_PAGES;
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osd_data->type = CEPH_OSD_DATA_TYPE_PAGES;
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@ -71,7 +71,10 @@ struct ceph_osd_data {
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};
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};
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struct ceph_pagelist *pagelist;
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struct ceph_pagelist *pagelist;
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#ifdef CONFIG_BLOCK
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#ifdef CONFIG_BLOCK
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struct bio *bio;
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struct {
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struct bio *bio; /* list of bios */
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size_t bio_length; /* total in list */
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};
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#endif /* CONFIG_BLOCK */
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#endif /* CONFIG_BLOCK */
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};
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};
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};
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};
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