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ceph: do not feed bad device ids to crush

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Do not feed bad (large) device ids to CRUSH.

Signed-off-by: Sage Weil <sage@newdream.net>
This commit is contained in:
Sage Weil 2009-12-09 12:34:01 -08:00
parent c2e552e76e
commit 767ea5c33a
1 changed files with 5 additions and 0 deletions
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5
fs/ceph/osdmap.c
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@ -868,6 +868,11 @@ static int *calc_pg_raw(struct ceph_osdmap *osdmap, struct ceph_pg pgid,
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;
if (poolid >= osdmap->num_pools)
return NULL;
pool = &osdmap->pg_pool[poolid];