diff options
| author | Alex Elder <elder@inktank.com> | 2012-11-14 22:25:18 +0400 |
|---|---|---|
| committer | Alex Elder <elder@inktank.com> | 2013-01-18 02:34:58 +0400 |
| commit | 0829661863fb5c8031c1c5c119693ea157517783 (patch) | |
| tree | 716416a4d4798a26e174a50563987796c82e12f1 /drivers/block | |
| parent | 2b5fc648af5eec2f4fe984cb6b926214e02c5cf4 (diff) | |
| download | linux-0829661863fb5c8031c1c5c119693ea157517783.tar.xz | |
rbd: pull in ceph_calc_raw_layout()
This is the first in a series of patches aimed at eliminating
the use of ceph_calc_raw_layout() by rbd.
It simply pulls in a copy of that function and renames it
rbd_calc_raw_layout().
Signed-off-by: Alex Elder <elder@inktank.com>
Reviewed-by: Josh Durgin <josh.durgin@inktank.com>
Diffstat (limited to 'drivers/block')
| -rw-r--r-- | drivers/block/rbd.c | 36 |
1 files changed, 35 insertions, 1 deletions
diff --git a/drivers/block/rbd.c b/drivers/block/rbd.c index 7ce178fd6fe5..eee0d3649dcf 100644 --- a/drivers/block/rbd.c +++ b/drivers/block/rbd.c @@ -1101,6 +1101,40 @@ static void rbd_layout_init(struct ceph_file_layout *layout, u64 pool_id) layout->fl_pg_pool = cpu_to_le32((u32) pool_id); } +int rbd_calc_raw_layout(struct ceph_file_layout *layout, + u64 off, u64 *plen, u64 *bno, + struct ceph_osd_request *req, + struct ceph_osd_req_op *op) +{ + u64 orig_len = *plen; + u64 objoff, objlen; /* extent in object */ + int r; + + /* object extent? */ + r = ceph_calc_file_object_mapping(layout, off, orig_len, bno, + &objoff, &objlen); + if (r < 0) + return r; + if (objlen < orig_len) { + *plen = objlen; + dout(" skipping last %llu, final file extent %llu~%llu\n", + orig_len - *plen, off, *plen); + } + + if (op->op == CEPH_OSD_OP_READ || op->op == CEPH_OSD_OP_WRITE) { + op->extent.offset = objoff; + op->extent.length = objlen; + } + req->r_num_pages = calc_pages_for(off, *plen); + req->r_page_alignment = off & ~PAGE_MASK; + if (op->op == CEPH_OSD_OP_WRITE) + op->payload_len = *plen; + + dout("calc_layout bno=%llx %llu~%llu (%d pages)\n", + *bno, objoff, objlen, req->r_num_pages); + return 0; +} + /* * Send ceph osd request */ @@ -1167,7 +1201,7 @@ static int rbd_do_request(struct request *rq, osd_req->r_oid_len = strlen(osd_req->r_oid); rbd_layout_init(&osd_req->r_file_layout, rbd_dev->spec->pool_id); - ret = ceph_calc_raw_layout(&osd_req->r_file_layout, + ret = rbd_calc_raw_layout(&osd_req->r_file_layout, ofs, &len, &bno, osd_req, op); rbd_assert(ret == 0); |