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libceph: fix pg_temp mapping calculation 

We need to apply the modulo pg_num calculation before looking up a pgid in
the pg_temp mapping rbtree.  This fixes pg_temp mappings, and fixes
(some) misdirected requests that result in messages like

[WRN] client4104 10.0.1.219:0/275025290 misdirected client4104.1:129 0.1 to osd0 not [1,0] in e11/11

on the server and stall make the client block without getting a reply (at
least until the pg_temp mapping goes way, but that can take a long long
time).

Reorder calc_pg_raw() a bit to make more sense.

Signed-off-by: Sage Weil <sage@newdream.net>
This commit is contained in:
Sage Weil 2011-09-28 10:08:27 -07:00
parent 935b639a04
commit 782e182e91
1 changed files with 21 additions and 13 deletions
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34
net/ceph/osdmap.c
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@ -1046,10 +1046,25 @@ static int *calc_pg_raw(struct ceph_osdmap *osdmap, struct ceph_pg pgid,
struct ceph_pg_mapping *pg;
struct ceph_pg_pool_info *pool;
int ruleno;
unsigned poolid, ps, pps;
unsigned poolid, ps, pps, t;
int preferred;
poolid = le32_to_cpu(pgid.pool);
ps = le16_to_cpu(pgid.ps);
preferred = (s16)le16_to_cpu(pgid.preferred);
pool = __lookup_pg_pool(&osdmap->pg_pools, poolid);
if (!pool)
return NULL;
/* pg_temp? */
if (preferred >= 0)
t = ceph_stable_mod(ps, le32_to_cpu(pool->v.lpg_num),
pool->lpgp_num_mask);
else
t = ceph_stable_mod(ps, le32_to_cpu(pool->v.pg_num),
pool->pgp_num_mask);
pgid.ps = cpu_to_le16(t);
pg = __lookup_pg_mapping(&osdmap->pg_temp, pgid);
if (pg) {
*num = pg->len;
@ -1057,18 +1072,6 @@ static int *calc_pg_raw(struct ceph_osdmap *osdmap, struct ceph_pg pgid,
}
/* crush */
poolid = le32_to_cpu(pgid.pool);
ps = le16_to_cpu(pgid.ps);
preferred = (s16)le16_to_cpu(pgid.preferred);
/* don't forcefeed bad device ids to crush */
if (preferred >= osdmap->max_osd ||
preferred >= osdmap->crush->max_devices)
preferred = -1;
pool = __lookup_pg_pool(&osdmap->pg_pools, poolid);
if (!pool)
return NULL;
ruleno = crush_find_rule(osdmap->crush, pool->v.crush_ruleset,
pool->v.type, pool->v.size);
if (ruleno < 0) {
@ -1078,6 +1081,11 @@ static int *calc_pg_raw(struct ceph_osdmap *osdmap, struct ceph_pg pgid,
return NULL;
}
/* don't forcefeed bad device ids to crush */
if (preferred >= osdmap->max_osd ||
preferred >= osdmap->crush->max_devices)
preferred = -1;
if (preferred >= 0)
pps = ceph_stable_mod(ps,
le32_to_cpu(pool->v.lpgp_num),