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libceph: follow {read,write}_tier fields on osd request submission

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Overwrite ceph_osd_request::r_oloc.pool with read_tier for read ops and
write_tier for write and read+write ops (aka basic tiering support).
{read,write}_tier are part of pg_pool_t since v9.  This commit bumps
our pg_pool_t decode compat version from v7 to v9, all new fields
except for {read,write}_tier are ignored.

Signed-off-by: Ilya Dryomov <ilya.dryomov@inktank.com>
Reviewed-by: Sage Weil <sage@inktank.com>
This commit is contained in:
Ilya Dryomov
2014-01-27 17:40:19 +02:00
parent ce7f6a2790
commit 17a13e4028
3 changed files with 55 additions and 5 deletions
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30
net/ceph/osd_client.c
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@@ -1249,6 +1249,32 @@ static bool __req_should_be_paused(struct ceph_osd_client *osdc,
(req->r_flags & CEPH_OSD_FLAG_WRITE && pausewr);
}
/*
* Calculate mapping of a request to a PG. Takes tiering into account.
*/
static int __calc_request_pg(struct ceph_osdmap *osdmap,
struct ceph_osd_request *req,
struct ceph_pg *pg_out)
{
if ((req->r_flags & CEPH_OSD_FLAG_IGNORE_OVERLAY) == 0) {
struct ceph_pg_pool_info *pi;
pi = ceph_pg_pool_by_id(osdmap, req->r_oloc.pool);
if (pi) {
if ((req->r_flags & CEPH_OSD_FLAG_READ) &&
pi->read_tier >= 0)
req->r_oloc.pool = pi->read_tier;
if ((req->r_flags & CEPH_OSD_FLAG_WRITE) &&
pi->write_tier >= 0)
req->r_oloc.pool = pi->write_tier;
}
/* !pi is caught in ceph_oloc_oid_to_pg() */
}
return ceph_oloc_oid_to_pg(osdmap, &req->r_oloc,
&req->r_oid, pg_out);
}
/*
* Pick an osd (the first 'up' osd in the pg), allocate the osd struct
* (as needed), and set the request r_osd appropriately. If there is
@@ -1269,8 +1295,8 @@ static int __map_request(struct ceph_osd_client *osdc,
bool was_paused;
dout("map_request %p tid %lld\n", req, req->r_tid);
err = ceph_oloc_oid_to_pg(osdc->osdmap, &req->r_oloc, &req->r_oid,
&pgid);
err = __calc_request_pg(osdc->osdmap, req, &pgid);
if (err) {
list_move(&req->r_req_lru_item, &osdc->req_notarget);
return err;