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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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2
include/linux/ceph/osdmap.h
View File

@ -35,6 +35,8 @@ struct ceph_pg_pool_info {
u8 object_hash;
u32 pg_num, pgp_num;
int pg_num_mask, pgp_num_mask;
s64 read_tier;
s64 write_tier; /* wins for read+write ops */
u64 flags;
char *name;
};

30
net/ceph/osd_client.c
View File

@ -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;

28
net/ceph/osdmap.c
View File

@ -519,8 +519,8 @@ static int __decode_pool(void **p, void *end, struct ceph_pg_pool_info *pi)
pr_warning("got v %d < 5 cv %d of ceph_pg_pool\n", ev, cv);
return -EINVAL;
}
if (cv > 7) {
pr_warning("got v %d cv %d > 7 of ceph_pg_pool\n", ev, cv);
if (cv > 9) {
pr_warning("got v %d cv %d > 9 of ceph_pg_pool\n", ev, cv);
return -EINVAL;
}
len = ceph_decode_32(p);
@ -548,12 +548,34 @@ static int __decode_pool(void **p, void *end, struct ceph_pg_pool_info *pi)
*p += len;
}
/* skip removed snaps */
/* skip removed_snaps */
num = ceph_decode_32(p);
*p += num * (8 + 8);
*p += 8; /* skip auid */
pi->flags = ceph_decode_64(p);
*p += 4; /* skip crash_replay_interval */
if (ev >= 7)
*p += 1; /* skip min_size */
if (ev >= 8)
*p += 8 + 8; /* skip quota_max_* */
if (ev >= 9) {
/* skip tiers */
num = ceph_decode_32(p);
*p += num * 8;
*p += 8; /* skip tier_of */
*p += 1; /* skip cache_mode */
pi->read_tier = ceph_decode_64(p);
pi->write_tier = ceph_decode_64(p);
} else {
pi->read_tier = -1;
pi->write_tier = -1;
}
/* ignore the rest */