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| author | Sage Weil <sage@inktank.com> | 2012-05-07 15:35:48 -0700 |
|---|---|---|
| committer | Sage Weil <sage@inktank.com> | 2012-05-07 15:38:51 -0700 |
| commit | 0668216efe16ab1adf077e5f138775cee2af927a (patch) | |
| tree | 9839f651cb90f22e50ddc585098105e8028497e0 /net/ceph/crush | |
| parent | a1f4895be8bf1ba56c2306b058f51619e9b0e8f8 (diff) | |
| download | linux-0668216efe16ab1adf077e5f138775cee2af927a.tar.gz linux-0668216efe16ab1adf077e5f138775cee2af927a.tar.bz2 linux-0668216efe16ab1adf077e5f138775cee2af927a.zip | |
crush: use a temporary variable to simplify crush_do_rule
Use a temporary variable here to avoid repeated array lookups and clean up
the code a bit.
This reflects ceph.git commit 6b5be27634ad307b471a5bf0db85c4f5c834885f.
Reviewed-by: Alex Elder <elder@inktank.com>
Signed-off-by: Sage Weil <sage@inktank.com>
Diffstat (limited to 'net/ceph/crush')
| -rw-r--r-- | net/ceph/crush/mapper.c | 20 |
1 files changed, 11 insertions, 9 deletions
diff --git a/net/ceph/crush/mapper.c b/net/ceph/crush/mapper.c index 00baad5d3bde..fba9460fe572 100644 --- a/net/ceph/crush/mapper.c +++ b/net/ceph/crush/mapper.c @@ -519,14 +519,15 @@ int crush_do_rule(const struct crush_map *map, } for (step = 0; step < rule->len; step++) { + struct crush_rule_step *curstep = &rule->steps[step]; + firstn = 0; - switch (rule->steps[step].op) { + switch (curstep->op) { case CRUSH_RULE_TAKE: - w[0] = rule->steps[step].arg1; + w[0] = curstep->arg1; /* find position in force_context/hierarchy */ - while (force_pos >= 0 && - force_context[force_pos] != w[0]) + while (force_pos >= 0 && force_context[force_pos] != w[0]) force_pos--; /* and move past it */ if (force_pos >= 0) @@ -538,15 +539,16 @@ int crush_do_rule(const struct crush_map *map, case CRUSH_RULE_CHOOSE_LEAF_FIRSTN: case CRUSH_RULE_CHOOSE_FIRSTN: firstn = 1; + /* fall through */ case CRUSH_RULE_CHOOSE_LEAF_INDEP: case CRUSH_RULE_CHOOSE_INDEP: if (wsize == 0) break; recurse_to_leaf = - rule->steps[step].op == + curstep->op == CRUSH_RULE_CHOOSE_LEAF_FIRSTN || - rule->steps[step].op == + curstep->op == CRUSH_RULE_CHOOSE_LEAF_INDEP; /* reset output */ @@ -558,7 +560,7 @@ int crush_do_rule(const struct crush_map *map, * basically, numrep <= 0 means relative to * the provided result_max */ - numrep = rule->steps[step].arg1; + numrep = curstep->arg1; if (numrep <= 0) { numrep += result_max; if (numrep <= 0) @@ -569,7 +571,7 @@ int crush_do_rule(const struct crush_map *map, /* skip any intermediate types */ while (force_pos && force_context[force_pos] < 0 && - rule->steps[step].arg2 != + curstep->arg2 != map->buckets[-1 - force_context[force_pos]]->type) force_pos--; @@ -583,7 +585,7 @@ int crush_do_rule(const struct crush_map *map, map->buckets[-1-w[i]], weight, x, numrep, - rule->steps[step].arg2, + curstep->arg2, o+osize, j, firstn, recurse_to_leaf, c+osize); |