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Commit 782e182e authored by Sage Weil's avatar Sage Weil
Browse files

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: default avatarSage Weil <sage@newdream.net>
parent 935b639a

net/ceph/osdmap.c

+21 −13
Original line number Diff line number Diff line
@@ -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),