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author | Sage Weil <sage@inktank.com> | 2012-05-07 15:35:24 -0700 |
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committer | Sage Weil <sage@inktank.com> | 2012-05-07 15:38:51 -0700 |
commit | a1f4895be8bf1ba56c2306b058f51619e9b0e8f8 (patch) | |
tree | f5bdd809f4bcc24daa0dfe1f7bcc8eb2d56227bb /net/ceph | |
parent | c90f95ed46393e29d843686e21947d1c6fcb1164 (diff) | |
download | linux-stable-a1f4895be8bf1ba56c2306b058f51619e9b0e8f8.tar.gz linux-stable-a1f4895be8bf1ba56c2306b058f51619e9b0e8f8.tar.bz2 linux-stable-a1f4895be8bf1ba56c2306b058f51619e9b0e8f8.zip |
crush: be more tolerant of nonsensical crush maps
If we get a map that doesn't make sense, error out or ignore the badness
instead of BUGging out. This reflects the ceph.git commits
9895f0bff7dc68e9b49b572613d242315fb11b6c and
8ded26472058d5205803f244c2f33cb6cb10de79.
Reviewed-by: Alex Elder <elder@inktank.com>
Signed-off-by: Sage Weil <sage@inktank.com>
Diffstat (limited to 'net/ceph')
-rw-r--r-- | net/ceph/crush/mapper.c | 33 |
1 files changed, 24 insertions, 9 deletions
diff --git a/net/ceph/crush/mapper.c b/net/ceph/crush/mapper.c index 583f644b0e28..00baad5d3bde 100644 --- a/net/ceph/crush/mapper.c +++ b/net/ceph/crush/mapper.c @@ -152,8 +152,8 @@ static int bucket_list_choose(struct crush_bucket_list *bucket, return bucket->h.items[i]; } - BUG_ON(1); - return 0; + dprintk("bad list sums for bucket %d\n", bucket->h.id); + return bucket->h.items[0]; } @@ -239,6 +239,7 @@ static int bucket_straw_choose(struct crush_bucket_straw *bucket, static int crush_bucket_choose(struct crush_bucket *in, int x, int r) { dprintk(" crush_bucket_choose %d x=%d r=%d\n", in->id, x, r); + BUG_ON(in->size == 0); switch (in->alg) { case CRUSH_BUCKET_UNIFORM: return bucket_uniform_choose((struct crush_bucket_uniform *)in, @@ -253,7 +254,7 @@ static int crush_bucket_choose(struct crush_bucket *in, int x, int r) return bucket_straw_choose((struct crush_bucket_straw *)in, x, r); default: - BUG_ON(1); + dprintk("unknown bucket %d alg %d\n", in->id, in->alg); return in->items[0]; } } @@ -354,7 +355,11 @@ static int crush_choose(const struct crush_map *map, item = bucket_perm_choose(in, x, r); else item = crush_bucket_choose(in, x, r); - BUG_ON(item >= map->max_devices); + if (item >= map->max_devices) { + dprintk(" bad item %d\n", item); + skip_rep = 1; + break; + } /* desired type? */ if (item < 0) @@ -365,8 +370,12 @@ static int crush_choose(const struct crush_map *map, /* keep going? */ if (itemtype != type) { - BUG_ON(item >= 0 || - (-1-item) >= map->max_buckets); + if (item >= 0 || + (-1-item) >= map->max_buckets) { + dprintk(" bad item type %d\n", type); + skip_rep = 1; + break; + } in = map->buckets[-1-item]; retry_bucket = 1; continue; @@ -478,7 +487,10 @@ int crush_do_rule(const struct crush_map *map, int numrep; int firstn; - BUG_ON(ruleno >= map->max_rules); + if ((__u32)ruleno >= map->max_rules) { + dprintk(" bad ruleno %d\n", ruleno); + return 0; + } rule = map->rules[ruleno]; result_len = 0; @@ -528,7 +540,8 @@ int crush_do_rule(const struct crush_map *map, firstn = 1; case CRUSH_RULE_CHOOSE_LEAF_INDEP: case CRUSH_RULE_CHOOSE_INDEP: - BUG_ON(wsize == 0); + if (wsize == 0) + break; recurse_to_leaf = rule->steps[step].op == @@ -597,7 +610,9 @@ int crush_do_rule(const struct crush_map *map, break; default: - BUG_ON(1); + dprintk(" unknown op %d at step %d\n", + curstep->op, step); + break; } } return result_len; |