+++ /dev/null
-
-#include "CrushCompiler.h"
-
-#if defined(_AIX)
-#define EBADE ECORRUPT
-#endif
-
-#ifndef EBADE
-#define EBADE EFTYPE
-#endif
-#include <string>
-#include "common/errno.h"
-#include <boost/algorithm/string.hpp>
-
-// -------------
-
-static void print_type_name(ostream& out, int t, CrushWrapper &crush)
-{
- const char *name = crush.get_type_name(t);
- if (name)
- out << name;
- else if (t == 0)
- out << "device";
- else
- out << "type" << t;
-}
-
-static void print_item_name(ostream& out, int t, CrushWrapper &crush)
-{
- const char *name = crush.get_item_name(t);
- if (name)
- out << name;
- else if (t >= 0)
- out << "device" << t;
- else
- out << "bucket" << (-1-t);
-}
-
-static void print_bucket_class_ids(ostream& out, int t, CrushWrapper &crush)
-{
- if (crush.class_bucket.count(t) == 0)
- return;
- auto &class_to_id = crush.class_bucket[t];
- for (auto &i : class_to_id) {
- int c = i.first;
- int cid = i.second;
- const char* class_name = crush.get_class_name(c);
- assert(class_name);
- out << "\tid " << cid << " class " << class_name << "\t\t# do not change unnecessarily\n";
- }
-}
-
-static void print_item_class(ostream& out, int t, CrushWrapper &crush)
-{
- const char *c = crush.get_item_class(t);
- if (c)
- out << " class " << c;
-}
-
-static void print_class(ostream& out, int t, CrushWrapper &crush)
-{
- const char *c = crush.get_class_name(t);
- if (c)
- out << " class " << c;
- else
- out << " # unexpected class " << t;
-}
-
-static void print_rule_name(ostream& out, int t, CrushWrapper &crush)
-{
- const char *name = crush.get_rule_name(t);
- if (name)
- out << name;
- else
- out << "rule" << t;
-}
-
-static void print_fixedpoint(ostream& out, int i)
-{
- char s[20];
- snprintf(s, sizeof(s), "%.3f", (float)i / (float)0x10000);
- out << s;
-}
-
-int CrushCompiler::decompile_bucket_impl(int i, ostream &out)
-{
- const char *name = crush.get_item_name(i);
- if (name && !crush.is_valid_crush_name(name))
- return 0;
- int type = crush.get_bucket_type(i);
- print_type_name(out, type, crush);
- out << " ";
- print_item_name(out, i, crush);
- out << " {\n";
- out << "\tid " << i << "\t\t# do not change unnecessarily\n";
- print_bucket_class_ids(out, i, crush);
-
- out << "\t# weight ";
- print_fixedpoint(out, crush.get_bucket_weight(i));
- out << "\n";
-
- int n = crush.get_bucket_size(i);
-
- int alg = crush.get_bucket_alg(i);
- out << "\talg " << crush_bucket_alg_name(alg);
-
- // notate based on alg type
- bool dopos = false;
- switch (alg) {
- case CRUSH_BUCKET_UNIFORM:
- out << "\t# do not change bucket size (" << n << ") unnecessarily";
- dopos = true;
- break;
- case CRUSH_BUCKET_LIST:
- out << "\t# add new items at the end; do not change order unnecessarily";
- break;
- case CRUSH_BUCKET_TREE:
- out << "\t# do not change pos for existing items unnecessarily";
- dopos = true;
- break;
- }
- out << "\n";
-
- int hash = crush.get_bucket_hash(i);
- out << "\thash " << hash << "\t# " << crush_hash_name(hash) << "\n";
-
- for (int j=0; j<n; j++) {
- int item = crush.get_bucket_item(i, j);
- int w = crush.get_bucket_item_weight(i, j);
- out << "\titem ";
- print_item_name(out, item, crush);
- out << " weight ";
- print_fixedpoint(out, w);
- if (dopos)
- out << " pos " << j;
-
- out << "\n";
- }
- out << "}\n";
- return 0;
-}
-
-/* Basically, we just descend recursively into all of the buckets,
- * executing a depth-first traversal of the graph. Since the buckets form a
- * directed acyclic graph, this should work just fine. The graph isn't
- * necessarily a tree, so we have to keep track of what buckets we already
- * outputted. We don't want to output anything twice. We also keep track of
- * what buckets are in progress so that we can detect cycles. These can
- * arise through user error.
- */
-int CrushCompiler::decompile_bucket(int cur,
- std::map<int, dcb_state_t>& dcb_states,
- ostream &out)
-{
- if ((cur == 0) || (!crush.bucket_exists(cur)))
- return 0;
-
- std::map<int, dcb_state_t>::iterator c = dcb_states.find(cur);
- if (c == dcb_states.end()) {
- // Mark this bucket as "in progress."
- std::map<int, dcb_state_t>::value_type val(cur, DCB_STATE_IN_PROGRESS);
- std::pair <std::map<int, dcb_state_t>::iterator, bool> rval
- (dcb_states.insert(val));
- assert(rval.second);
- c = rval.first;
- }
- else if (c->second == DCB_STATE_DONE) {
- // We already did this bucket.
- return 0;
- }
- else if (c->second == DCB_STATE_IN_PROGRESS) {
- err << "decompile_crush_bucket: logic error: tried to decompile "
- "a bucket that is already being decompiled" << std::endl;
- return -EBADE;
- }
- else {
- err << "decompile_crush_bucket: logic error: illegal bucket state! "
- << c->second << std::endl;
- return -EBADE;
- }
-
- int bsize = crush.get_bucket_size(cur);
- for (int i = 0; i < bsize; ++i) {
- int item = crush.get_bucket_item(cur, i);
- std::map<int, dcb_state_t>::iterator d = dcb_states.find(item);
- if (d == dcb_states.end()) {
- int ret = decompile_bucket(item, dcb_states, out);
- if (ret)
- return ret;
- }
- else if (d->second == DCB_STATE_IN_PROGRESS) {
- err << "decompile_crush_bucket: error: while trying to output bucket "
- << cur << ", we found out that it contains one of the buckets that "
- << "contain it. This is not allowed. The buckets must form a "
- << "directed acyclic graph." << std::endl;
- return -EINVAL;
- }
- else if (d->second != DCB_STATE_DONE) {
- err << "decompile_crush_bucket: logic error: illegal bucket state "
- << d->second << std::endl;
- return -EBADE;
- }
- }
- decompile_bucket_impl(cur, out);
- c->second = DCB_STATE_DONE;
- return 0;
-}
-
-int CrushCompiler::decompile_weight_set_weights(crush_weight_set weight_set,
- ostream &out)
-{
- out << " [ ";
- for (__u32 i = 0; i < weight_set.size; i++) {
- print_fixedpoint(out, weight_set.weights[i]);
- out << " ";
- }
- out << "]\n";
- return 0;
-}
-
-int CrushCompiler::decompile_weight_set(crush_weight_set *weight_set,
- __u32 size,
- ostream &out)
-{
- out << " weight_set [\n";
- for (__u32 i = 0; i < size; i++) {
- int r = decompile_weight_set_weights(weight_set[i], out);
- if (r < 0)
- return r;
- }
- out << " ]\n";
- return 0;
-}
-
-int CrushCompiler::decompile_ids(__s32 *ids,
- __u32 size,
- ostream &out)
-{
- out << " ids [ ";
- for (__u32 i = 0; i < size; i++)
- out << ids[i] << " ";
- out << "]\n";
- return 0;
-}
-
-int CrushCompiler::decompile_choose_arg(crush_choose_arg *arg,
- int bucket_id,
- ostream &out)
-{
- int r;
- out << " {\n";
- out << " bucket_id " << bucket_id << "\n";
- if (arg->weight_set_size > 0) {
- r = decompile_weight_set(arg->weight_set, arg->weight_set_size, out);
- if (r < 0)
- return r;
- }
- if (arg->ids_size > 0) {
- r = decompile_ids(arg->ids, arg->ids_size, out);
- if (r < 0)
- return r;
- }
- out << " }\n";
- return 0;
-}
-
-int CrushCompiler::decompile_choose_arg_map(crush_choose_arg_map arg_map,
- ostream &out)
-{
- for (__u32 i = 0; i < arg_map.size; i++) {
- if ((arg_map.args[i].ids_size == 0) &&
- (arg_map.args[i].weight_set_size == 0))
- continue;
- int r = decompile_choose_arg(&arg_map.args[i], -1-i, out);
- if (r < 0)
- return r;
- }
- return 0;
-}
-
-int CrushCompiler::decompile_choose_args(const std::pair<const long unsigned int, crush_choose_arg_map> &i,
- ostream &out)
-{
- out << "choose_args " << i.first << " {\n";
- int r = decompile_choose_arg_map(i.second, out);
- if (r < 0)
- return r;
- out << "}\n";
- return 0;
-}
-
-int CrushCompiler::decompile(ostream &out)
-{
- out << "# begin crush map\n";
-
- // only dump tunables if they differ from the defaults
- if (crush.get_choose_local_tries() != 2)
- out << "tunable choose_local_tries " << crush.get_choose_local_tries() << "\n";
- if (crush.get_choose_local_fallback_tries() != 5)
- out << "tunable choose_local_fallback_tries " << crush.get_choose_local_fallback_tries() << "\n";
- if (crush.get_choose_total_tries() != 19)
- out << "tunable choose_total_tries " << crush.get_choose_total_tries() << "\n";
- if (crush.get_chooseleaf_descend_once() != 0)
- out << "tunable chooseleaf_descend_once " << crush.get_chooseleaf_descend_once() << "\n";
- if (crush.get_chooseleaf_vary_r() != 0)
- out << "tunable chooseleaf_vary_r " << crush.get_chooseleaf_vary_r() << "\n";
- if (crush.get_chooseleaf_stable() != 0)
- out << "tunable chooseleaf_stable " << crush.get_chooseleaf_stable() << "\n";
- if (crush.get_straw_calc_version() != 0)
- out << "tunable straw_calc_version " << crush.get_straw_calc_version() << "\n";
- if (crush.get_allowed_bucket_algs() != CRUSH_LEGACY_ALLOWED_BUCKET_ALGS)
- out << "tunable allowed_bucket_algs " << crush.get_allowed_bucket_algs()
- << "\n";
-
- out << "\n# devices\n";
- for (int i=0; i<crush.get_max_devices(); i++) {
- out << "device " << i << " ";
- print_item_name(out, i, crush);
- print_item_class(out, i, crush);
- out << "\n";
- }
-
- out << "\n# types\n";
- int n = crush.get_num_type_names();
- for (int i=0; n; i++) {
- const char *name = crush.get_type_name(i);
- if (!name) {
- if (i == 0) out << "type 0 osd\n";
- continue;
- }
- n--;
- out << "type " << i << " " << name << "\n";
- }
-
- out << "\n# buckets\n";
- std::map<int, dcb_state_t> dcb_states;
- for (int bucket = -1; bucket > -1-crush.get_max_buckets(); --bucket) {
- int ret = decompile_bucket(bucket, dcb_states, out);
- if (ret)
- return ret;
- }
-
- out << "\n# rules\n";
- for (int i=0; i<crush.get_max_rules(); i++) {
- if (!crush.rule_exists(i))
- continue;
- out << "rule ";
- if (crush.get_rule_name(i))
- print_rule_name(out, i, crush);
- out << " {\n";
- out << "\tid " << i << "\n";
- if (i != crush.get_rule_mask_ruleset(i)) {
- out << "\t# WARNING: ruleset " << crush.get_rule_mask_ruleset(i) << " != id " << i << "; this will not recompile to the same map\n";
- }
-
- switch (crush.get_rule_mask_type(i)) {
- case CEPH_PG_TYPE_REPLICATED:
- out << "\ttype replicated\n";
- break;
- case CEPH_PG_TYPE_ERASURE:
- out << "\ttype erasure\n";
- break;
- default:
- out << "\ttype " << crush.get_rule_mask_type(i) << "\n";
- }
-
- out << "\tmin_size " << crush.get_rule_mask_min_size(i) << "\n";
- out << "\tmax_size " << crush.get_rule_mask_max_size(i) << "\n";
-
- for (int j=0; j<crush.get_rule_len(i); j++) {
- switch (crush.get_rule_op(i, j)) {
- case CRUSH_RULE_NOOP:
- out << "\tstep noop\n";
- break;
- case CRUSH_RULE_TAKE:
- out << "\tstep take ";
- {
- int step_item = crush.get_rule_arg1(i, j);
- int original_item;
- int c;
- int res = crush.split_id_class(step_item, &original_item, &c);
- if (res < 0)
- return res;
- if (c >= 0)
- step_item = original_item;
- print_item_name(out, step_item, crush);
- if (c >= 0)
- print_class(out, c, crush);
- }
- out << "\n";
- break;
- case CRUSH_RULE_EMIT:
- out << "\tstep emit\n";
- break;
- case CRUSH_RULE_SET_CHOOSE_TRIES:
- out << "\tstep set_choose_tries " << crush.get_rule_arg1(i, j)
- << "\n";
- break;
- case CRUSH_RULE_SET_CHOOSE_LOCAL_TRIES:
- out << "\tstep set_choose_local_tries " << crush.get_rule_arg1(i, j)
- << "\n";
- break;
- case CRUSH_RULE_SET_CHOOSE_LOCAL_FALLBACK_TRIES:
- out << "\tstep set_choose_local_fallback_tries " << crush.get_rule_arg1(i, j)
- << "\n";
- break;
- case CRUSH_RULE_SET_CHOOSELEAF_TRIES:
- out << "\tstep set_chooseleaf_tries " << crush.get_rule_arg1(i, j)
- << "\n";
- break;
- case CRUSH_RULE_SET_CHOOSELEAF_VARY_R:
- out << "\tstep set_chooseleaf_vary_r " << crush.get_rule_arg1(i, j)
- << "\n";
- break;
- case CRUSH_RULE_SET_CHOOSELEAF_STABLE:
- out << "\tstep set_chooseleaf_stable " << crush.get_rule_arg1(i, j)
- << "\n";
- break;
- case CRUSH_RULE_CHOOSE_FIRSTN:
- out << "\tstep choose firstn "
- << crush.get_rule_arg1(i, j)
- << " type ";
- print_type_name(out, crush.get_rule_arg2(i, j), crush);
- out << "\n";
- break;
- case CRUSH_RULE_CHOOSE_INDEP:
- out << "\tstep choose indep "
- << crush.get_rule_arg1(i, j)
- << " type ";
- print_type_name(out, crush.get_rule_arg2(i, j), crush);
- out << "\n";
- break;
- case CRUSH_RULE_CHOOSELEAF_FIRSTN:
- out << "\tstep chooseleaf firstn "
- << crush.get_rule_arg1(i, j)
- << " type ";
- print_type_name(out, crush.get_rule_arg2(i, j), crush);
- out << "\n";
- break;
- case CRUSH_RULE_CHOOSELEAF_INDEP:
- out << "\tstep chooseleaf indep "
- << crush.get_rule_arg1(i, j)
- << " type ";
- print_type_name(out, crush.get_rule_arg2(i, j), crush);
- out << "\n";
- break;
- }
- }
- out << "}\n";
- }
- if (crush.choose_args.size() > 0) {
- out << "\n# choose_args\n";
- for (auto i : crush.choose_args) {
- int ret = decompile_choose_args(i, out);
- if (ret)
- return ret;
- }
- }
- out << "\n# end crush map" << std::endl;
- return 0;
-}
-
-
-// ================================================================
-
-string CrushCompiler::string_node(node_t &node)
-{
- return boost::trim_copy(string(node.value.begin(), node.value.end()));
-}
-
-int CrushCompiler::int_node(node_t &node)
-{
- string str = string_node(node);
- return strtol(str.c_str(), 0, 10);
-}
-
-float CrushCompiler::float_node(node_t &node)
-{
- string s = string_node(node);
- return strtof(s.c_str(), 0);
-}
-
-int CrushCompiler::parse_device(iter_t const& i)
-{
- int id = int_node(i->children[1]);
-
- string name = string_node(i->children[2]);
- crush.set_item_name(id, name.c_str());
- if (item_id.count(name)) {
- err << "item " << name << " defined twice" << std::endl;
- return -1;
- }
- item_id[name] = id;
- id_item[id] = name;
-
- if (verbose) err << "device " << id << " '" << name << "'";
-
- if (i->children.size() > 3) {
- string c = string_node(i->children[4]);
- crush.set_item_class(id, c);
- if (verbose) err << " class" << " '" << c << "'" << std::endl;
- } else {
- if (verbose) err << std::endl;
- }
- return 0;
-}
-
-int CrushCompiler::parse_tunable(iter_t const& i)
-{
- string name = string_node(i->children[1]);
- int val = int_node(i->children[2]);
-
- if (name == "choose_local_tries")
- crush.set_choose_local_tries(val);
- else if (name == "choose_local_fallback_tries")
- crush.set_choose_local_fallback_tries(val);
- else if (name == "choose_total_tries")
- crush.set_choose_total_tries(val);
- else if (name == "chooseleaf_descend_once")
- crush.set_chooseleaf_descend_once(val);
- else if (name == "chooseleaf_vary_r")
- crush.set_chooseleaf_vary_r(val);
- else if (name == "chooseleaf_stable")
- crush.set_chooseleaf_stable(val);
- else if (name == "straw_calc_version")
- crush.set_straw_calc_version(val);
- else if (name == "allowed_bucket_algs")
- crush.set_allowed_bucket_algs(val);
- else {
- err << "tunable " << name << " not recognized" << std::endl;
- return -1;
- }
-
- /*
-
- current crop of tunables are all now "safe". re-enable this when we
- add new ones that are ... new.
-
- if (!unsafe_tunables) {
- err << "tunables are NOT FULLY IMPLEMENTED; enable with --enable-unsafe-tunables to enable this feature" << std::endl;
- return -1;
- }
- */
-
- if (verbose) err << "tunable " << name << " " << val << std::endl;
- return 0;
-}
-
-int CrushCompiler::parse_bucket_type(iter_t const& i)
-{
- int id = int_node(i->children[1]);
- string name = string_node(i->children[2]);
- if (verbose) err << "type " << id << " '" << name << "'" << std::endl;
- type_id[name] = id;
- crush.set_type_name(id, name.c_str());
- return 0;
-}
-
-int CrushCompiler::parse_bucket(iter_t const& i)
-{
- string tname = string_node(i->children[0]);
- if (!type_id.count(tname)) {
- err << "bucket type '" << tname << "' is not defined" << std::endl;
- return -1;
- }
- int type = type_id[tname];
-
- string name = string_node(i->children[1]);
- if (item_id.count(name)) {
- err << "bucket or device '" << name << "' is already defined" << std::endl;
- return -1;
- }
-
- int id = 0; // none, yet!
- int alg = -1;
- int hash = 0;
- set<int> used_items;
- int size = 0;
- map<int32_t, int32_t> class_id;
-
- for (unsigned p=3; p<i->children.size()-1; p++) {
- iter_t sub = i->children.begin() + p;
- string tag = string_node(sub->children[0]);
- //err << "tag " << tag << std::endl;
- if (tag == "id") {
- int maybe_id = int_node(sub->children[1]);
- if (verbose) err << "bucket " << name << " id " << maybe_id;
- if (sub->children.size() > 2) {
- string class_name = string_node(sub->children[3]);
- // note that we do not verify class existence here,
- // as this bucket might come from an empty shadow tree
- // which currently has no OSDs but is still referenced by a rule!
- int cid = crush.get_or_create_class_id(class_name);
- if (class_id.count(cid) != 0) {
- err << "duplicate device class " << class_name << " for bucket " << name << std::endl;
- return -ERANGE;
- }
- class_id[cid] = maybe_id;
- if (verbose) err << " class" << " '" << class_name << "'" << std::endl;
- } else {
- id = maybe_id;
- if (verbose) err << std::endl;
- }
- } else if (tag == "alg") {
- string a = string_node(sub->children[1]);
- if (a == "uniform")
- alg = CRUSH_BUCKET_UNIFORM;
- else if (a == "list")
- alg = CRUSH_BUCKET_LIST;
- else if (a == "tree")
- alg = CRUSH_BUCKET_TREE;
- else if (a == "straw")
- alg = CRUSH_BUCKET_STRAW;
- else if (a == "straw2")
- alg = CRUSH_BUCKET_STRAW2;
- else {
- err << "unknown bucket alg '" << a << "'" << std::endl << std::endl;
- return -EINVAL;
- }
- }
- else if (tag == "hash") {
- string a = string_node(sub->children[1]);
- if (a == "rjenkins1")
- hash = CRUSH_HASH_RJENKINS1;
- else
- hash = atoi(a.c_str());
- }
- else if (tag == "item") {
- // first, just determine which item pos's are already used
- size++;
- for (unsigned q = 2; q < sub->children.size(); q++) {
- string tag = string_node(sub->children[q++]);
- if (tag == "pos") {
- int pos = int_node(sub->children[q]);
- if (used_items.count(pos)) {
- err << "item '" << string_node(sub->children[1]) << "' in bucket '" << name << "' has explicit pos " << pos << ", which is occupied" << std::endl;
- return -1;
- }
- used_items.insert(pos);
- }
- }
- }
- else ceph_abort();
- }
-
- // now do the items.
- if (!used_items.empty())
- size = MAX(size, *used_items.rbegin());
- vector<int> items(size);
- vector<int> weights(size);
-
- int curpos = 0;
- unsigned bucketweight = 0;
- bool have_uniform_weight = false;
- unsigned uniform_weight = 0;
- for (unsigned p=3; p<i->children.size()-1; p++) {
- iter_t sub = i->children.begin() + p;
- string tag = string_node(sub->children[0]);
- if (tag == "item") {
-
- string iname = string_node(sub->children[1]);
- if (!item_id.count(iname)) {
- err << "item '" << iname << "' in bucket '" << name << "' is not defined" << std::endl;
- return -1;
- }
- int itemid = item_id[iname];
-
- unsigned weight = 0x10000;
- if (item_weight.count(itemid))
- weight = item_weight[itemid];
-
- int pos = -1;
- for (unsigned q = 2; q < sub->children.size(); q++) {
- string tag = string_node(sub->children[q++]);
- if (tag == "weight") {
- weight = float_node(sub->children[q]) * (float)0x10000;
- if (weight > CRUSH_MAX_DEVICE_WEIGHT && itemid >= 0) {
- err << "device weight limited to " << CRUSH_MAX_DEVICE_WEIGHT / 0x10000 << std::endl;
- return -ERANGE;
- }
- else if (weight > CRUSH_MAX_BUCKET_WEIGHT && itemid < 0) {
- err << "bucket weight limited to " << CRUSH_MAX_BUCKET_WEIGHT / 0x10000
- << " to prevent overflow" << std::endl;
- return -ERANGE;
- }
- }
- else if (tag == "pos")
- pos = int_node(sub->children[q]);
- else
- ceph_abort();
-
- }
- if (alg == CRUSH_BUCKET_UNIFORM) {
- if (!have_uniform_weight) {
- have_uniform_weight = true;
- uniform_weight = weight;
- } else {
- if (uniform_weight != weight) {
- err << "item '" << iname << "' in uniform bucket '" << name << "' has weight " << weight
- << " but previous item(s) have weight " << (float)uniform_weight/(float)0x10000
- << "; uniform bucket items must all have identical weights." << std::endl;
- return -1;
- }
- }
- }
-
- if (pos >= size) {
- err << "item '" << iname << "' in bucket '" << name << "' has pos " << pos << " >= size " << size << std::endl;
- return -1;
- }
- if (pos < 0) {
- while (used_items.count(curpos)) curpos++;
- pos = curpos++;
- }
- //err << " item " << iname << " (" << itemid << ") pos " << pos << " weight " << weight << std::endl;
- items[pos] = itemid;
- weights[pos] = weight;
-
- if (crush_addition_is_unsafe(bucketweight, weight)) {
- err << "oh no! our bucket weights are overflowing all over the place, better lower the item weights" << std::endl;
- return -ERANGE;
- }
-
- bucketweight += weight;
- }
- }
-
- if (id == 0) {
- for (id=-1; id_item.count(id); id--) ;
- //err << "assigned id " << id << std::endl;
- }
-
- for (auto &i : class_id)
- class_bucket[id][i.first] = i.second;
-
- if (verbose) err << "bucket " << name << " (" << id << ") " << size << " items and weight "
- << (float)bucketweight / (float)0x10000 << std::endl;
- id_item[id] = name;
- item_id[name] = id;
- item_weight[id] = bucketweight;
-
- assert(id != 0);
- int idout;
- int r = crush.add_bucket(id, alg, hash, type, size,
- &items[0], &weights[0], &idout);
- if (r < 0) {
- if (r == -EEXIST)
- err << "Duplicate bucket id " << id << std::endl;
- else
- err << "add_bucket failed " << cpp_strerror(r) << std::endl;
- return r;
- }
- r = crush.set_item_name(id, name.c_str());
- return r;
-}
-
-int CrushCompiler::parse_rule(iter_t const& i)
-{
- int start; // rule name is optional!
-
- string rname = string_node(i->children[1]);
- if (rname != "{") {
- if (rule_id.count(rname)) {
- err << "rule name '" << rname << "' already defined\n" << std::endl;
- return -1;
- }
- start = 4;
- } else {
- rname = string();
- start = 3;
- }
-
- int ruleno = int_node(i->children[start]);
-
- string tname = string_node(i->children[start+2]);
- int type;
- if (tname == "replicated")
- type = CEPH_PG_TYPE_REPLICATED;
- else if (tname == "erasure")
- type = CEPH_PG_TYPE_ERASURE;
- else
- ceph_abort();
-
- int minsize = int_node(i->children[start+4]);
- int maxsize = int_node(i->children[start+6]);
-
- int steps = i->children.size() - start - 8;
- //err << "num steps " << steps << std::endl;
-
- if (crush.rule_exists(ruleno)) {
- err << "rule " << ruleno << " already exists" << std::endl;
- return -1;
- }
- int r = crush.add_rule(ruleno, steps, type, minsize, maxsize);
- if (r != ruleno) {
- err << "unable to add rule id " << ruleno << " for rule '" << rname
- << "'" << std::endl;
- return -1;
- }
- if (rname.length()) {
- crush.set_rule_name(ruleno, rname.c_str());
- rule_id[rname] = ruleno;
- }
-
- int step = 0;
- for (iter_t p = i->children.begin() + start + 7; step < steps; p++) {
- iter_t s = p->children.begin() + 1;
- int stepid = s->value.id().to_long();
- switch (stepid) {
- case crush_grammar::_step_take:
- {
- string item = string_node(s->children[1]);
- if (!item_id.count(item)) {
- err << "in rule '" << rname << "' item '" << item << "' not defined" << std::endl;
- return -1;
- }
- int id = item_id[item];
- int c = -1;
- string class_name;
- if (s->children.size() > 2) {
- class_name = string_node(s->children[3]);
- c = crush.get_class_id(class_name);
- if (c < 0)
- return c;
- if (crush.class_bucket.count(id) == 0) {
- err << "in rule '" << rname << "' step take " << item
- << " has no class information" << std::endl;
- return -EINVAL;
- }
- if (crush.class_bucket[id].count(c) == 0) {
- err << "in rule '" << rname << "' step take " << item
- << " no matching bucket for class " << class_name << std::endl;
- return -EINVAL;
- }
- id = crush.class_bucket[id][c];
- }
- if (verbose) {
- err << "rule " << rname << " take " << item;
- if (c < 0)
- err << std::endl;
- else
- err << " remapped to " << crush.get_item_name(id) << std::endl;
- }
-
- crush.set_rule_step_take(ruleno, step++, id);
- }
- break;
-
- case crush_grammar::_step_set_choose_tries:
- {
- int val = int_node(s->children[1]);
- crush.set_rule_step_set_choose_tries(ruleno, step++, val);
- }
- break;
-
- case crush_grammar::_step_set_choose_local_tries:
- {
- int val = int_node(s->children[1]);
- crush.set_rule_step_set_choose_local_tries(ruleno, step++, val);
- }
- break;
-
- case crush_grammar::_step_set_choose_local_fallback_tries:
- {
- int val = int_node(s->children[1]);
- crush.set_rule_step_set_choose_local_fallback_tries(ruleno, step++, val);
- }
- break;
-
- case crush_grammar::_step_set_chooseleaf_tries:
- {
- int val = int_node(s->children[1]);
- crush.set_rule_step_set_chooseleaf_tries(ruleno, step++, val);
- }
- break;
-
- case crush_grammar::_step_set_chooseleaf_vary_r:
- {
- int val = int_node(s->children[1]);
- crush.set_rule_step_set_chooseleaf_vary_r(ruleno, step++, val);
- }
- break;
-
- case crush_grammar::_step_set_chooseleaf_stable:
- {
- int val = int_node(s->children[1]);
- crush.set_rule_step_set_chooseleaf_stable(ruleno, step++, val);
- }
- break;
-
- case crush_grammar::_step_choose:
- case crush_grammar::_step_chooseleaf:
- {
- string type = string_node(s->children[4]);
- if (!type_id.count(type)) {
- err << "in rule '" << rname << "' type '" << type << "' not defined" << std::endl;
- return -1;
- }
- string choose = string_node(s->children[0]);
- string mode = string_node(s->children[1]);
- if (choose == "choose") {
- if (mode == "firstn")
- crush.set_rule_step_choose_firstn(ruleno, step++, int_node(s->children[2]), type_id[type]);
- else if (mode == "indep")
- crush.set_rule_step_choose_indep(ruleno, step++, int_node(s->children[2]), type_id[type]);
- else ceph_abort();
- } else if (choose == "chooseleaf") {
- if (mode == "firstn")
- crush.set_rule_step_choose_leaf_firstn(ruleno, step++, int_node(s->children[2]), type_id[type]);
- else if (mode == "indep")
- crush.set_rule_step_choose_leaf_indep(ruleno, step++, int_node(s->children[2]), type_id[type]);
- else ceph_abort();
- } else ceph_abort();
- }
- break;
-
- case crush_grammar::_step_emit:
- crush.set_rule_step_emit(ruleno, step++);
- break;
-
- default:
- err << "bad crush step " << stepid << std::endl;
- return -1;
- }
- }
- assert(step == steps);
- return 0;
-}
-
-int CrushCompiler::parse_weight_set_weights(iter_t const& i, int bucket_id, crush_weight_set *weight_set)
-{
- // -2 for the enclosing [ ]
- __u32 size = i->children.size() - 2;
- __u32 bucket_size = crush.get_bucket_size(bucket_id);
- if (size != bucket_size) {
- err << bucket_id << " needs exactly " << bucket_size
- << " weights but got " << size << std::endl;
- return -1;
- }
- weight_set->size = size;
- weight_set->weights = (__u32 *)calloc(weight_set->size, sizeof(__u32));
- __u32 pos = 0;
- for (iter_t p = i->children.begin() + 1; p != i->children.end(); p++, pos++)
- if (pos < size)
- weight_set->weights[pos] = float_node(*p) * (float)0x10000;
- return 0;
-}
-
-int CrushCompiler::parse_weight_set(iter_t const& i, int bucket_id, crush_choose_arg *arg)
-{
- // -3 stands for the leading "weight_set" keyword and the enclosing [ ]
- arg->weight_set_size = i->children.size() - 3;
- arg->weight_set = (crush_weight_set *)calloc(arg->weight_set_size, sizeof(crush_weight_set));
- __u32 pos = 0;
- for (iter_t p = i->children.begin(); p != i->children.end(); p++) {
- int r = 0;
- switch((int)p->value.id().to_long()) {
- case crush_grammar::_weight_set_weights:
- if (pos < arg->weight_set_size) {
- r = parse_weight_set_weights(p, bucket_id, &arg->weight_set[pos]);
- pos++;
- } else {
- err << "invalid weight_set syntax" << std::endl;
- r = -1;
- }
- }
- if (r < 0)
- return r;
- }
- return 0;
-}
-
-int CrushCompiler::parse_choose_arg_ids(iter_t const& i, int bucket_id, crush_choose_arg *arg)
-{
- // -3 for the leading "ids" keyword and the enclosing [ ]
- __u32 size = i->children.size() - 3;
- __u32 bucket_size = crush.get_bucket_size(bucket_id);
- if (size != bucket_size) {
- err << bucket_id << " needs exactly " << bucket_size
- << " ids but got " << size << std::endl;
- return -1;
- }
- arg->ids_size = size;
- arg->ids = (__s32 *)calloc(arg->ids_size, sizeof(__s32));
- __u32 pos = 0;
- for (iter_t p = i->children.begin() + 2; pos < size; p++, pos++)
- arg->ids[pos] = int_node(*p);
- return 0;
-}
-
-int CrushCompiler::parse_choose_arg(iter_t const& i, crush_choose_arg *args)
-{
- int bucket_id = int_node(i->children[2]);
- if (-1-bucket_id < 0 || -1-bucket_id >= crush.get_max_buckets()) {
- err << bucket_id << " is out of range" << std::endl;
- return -1;
- }
- if (!crush.bucket_exists(bucket_id)) {
- err << bucket_id << " does not exist" << std::endl;
- return -1;
- }
- crush_choose_arg *arg = &args[-1-bucket_id];
- for (iter_t p = i->children.begin(); p != i->children.end(); p++) {
- int r = 0;
- switch((int)p->value.id().to_long()) {
- case crush_grammar::_weight_set:
- r = parse_weight_set(p, bucket_id, arg);
- break;
- case crush_grammar::_choose_arg_ids:
- r = parse_choose_arg_ids(p, bucket_id, arg);
- break;
- }
- if (r < 0)
- return r;
- }
- return 0;
-}
-
-int CrushCompiler::parse_choose_args(iter_t const& i)
-{
- int choose_arg_index = int_node(i->children[1]);
- if (crush.choose_args.find(choose_arg_index) != crush.choose_args.end()) {
- err << choose_arg_index << " duplicated" << std::endl;
- return -1;
- }
- crush_choose_arg_map arg_map;
- arg_map.size = crush.get_max_buckets();
- arg_map.args = (crush_choose_arg *)calloc(arg_map.size, sizeof(crush_choose_arg));
- for (iter_t p = i->children.begin() + 2; p != i->children.end(); p++) {
- int r = 0;
- switch((int)p->value.id().to_long()) {
- case crush_grammar::_choose_arg:
- r = parse_choose_arg(p, arg_map.args);
- break;
- }
- if (r < 0) {
- crush.destroy_choose_args(arg_map);
- return r;
- }
- }
- crush.choose_args[choose_arg_index] = arg_map;
- return 0;
-}
-
-void CrushCompiler::find_used_bucket_ids(iter_t const& i)
-{
- for (iter_t p = i->children.begin(); p != i->children.end(); p++) {
- if ((int)p->value.id().to_long() == crush_grammar::_bucket) {
- iter_t firstline = p->children.begin() + 3;
- string tag = string_node(firstline->children[0]);
- if (tag == "id") {
- int id = int_node(firstline->children[1]);
- //err << "saw bucket id " << id << std::endl;
- id_item[id] = string();
- }
- }
- }
-}
-
-int CrushCompiler::parse_crush(iter_t const& i)
-{
- find_used_bucket_ids(i);
- bool saw_rule = false;
- for (iter_t p = i->children.begin(); p != i->children.end(); p++) {
- int r = 0;
- switch (p->value.id().to_long()) {
- case crush_grammar::_tunable:
- r = parse_tunable(p);
- break;
- case crush_grammar::_device:
- r = parse_device(p);
- break;
- case crush_grammar::_bucket_type:
- r = parse_bucket_type(p);
- break;
- case crush_grammar::_bucket:
- if (saw_rule) {
- err << "buckets must be defined before rules" << std::endl;
- return -1;
- }
- r = parse_bucket(p);
- break;
- case crush_grammar::_crushrule:
- if (!saw_rule) {
- saw_rule = true;
- crush.populate_classes(class_bucket);
- }
- r = parse_rule(p);
- break;
- case crush_grammar::_choose_args:
- r = parse_choose_args(p);
- break;
- default:
- ceph_abort();
- }
- if (r < 0) {
- return r;
- }
- }
-
- //err << "max_devices " << crush.get_max_devices() << std::endl;
- crush.finalize();
-
- return 0;
-}
-
-// squash runs of whitespace to one space, excepting newlines
-string CrushCompiler::consolidate_whitespace(string in)
-{
- string out;
-
- bool white = false;
- for (unsigned p=0; p<in.length(); p++) {
- if (isspace(in[p]) && in[p] != '\n') {
- if (white)
- continue;
- white = true;
- } else {
- if (white) {
- if (out.length()) out += " ";
- white = false;
- }
- out += in[p];
- }
- }
- if (verbose > 3)
- err << " \"" << in << "\" -> \"" << out << "\"" << std::endl;
- return out;
-}
-
-void CrushCompiler::dump(iter_t const& i, int ind)
-{
- err << "dump";
- for (int j=0; j<ind; j++)
- cout << "\t";
- long id = i->value.id().to_long();
- err << id << "\t";
- err << "'" << string(i->value.begin(), i->value.end())
- << "' " << i->children.size() << " children" << std::endl;
- for (unsigned int j = 0; j < i->children.size(); j++)
- dump(i->children.begin() + j, ind+1);
-}
-
-/**
-* This function fix the problem like below
-* rack using_foo { item foo }
-* host foo { ... }
-*
-* if an item being used by a bucket is defined after that bucket.
-* CRUSH compiler will create a map by which we can
-* not identify that item when selecting in that bucket.
-**/
-int CrushCompiler::adjust_bucket_item_place(iter_t const &i)
-{
- map<string,set<string> > bucket_items;
- map<string,iter_t> bucket_itrer;
- vector<string> buckets;
- for (iter_t p = i->children.begin(); p != i->children.end(); ++p) {
- if ((int)p->value.id().to_long() == crush_grammar::_bucket) {
- string name = string_node(p->children[1]);
- buckets.push_back(name);
- bucket_itrer[name] = p;
- //skip non-bucket-item children in the bucket's parse tree
- for (unsigned q=3; q < p->children.size()-1; ++q) {
- iter_t sub = p->children.begin() + q;
- if ((int)sub->value.id().to_long()
- == crush_grammar::_bucket_item) {
- string iname = string_node(sub->children[1]);
- bucket_items[name].insert(iname);
- }
- }
- }
- }
-
- //adjust the bucket
- for (unsigned i=0; i < buckets.size(); ++i) {
- for (unsigned j=i+1; j < buckets.size(); ++j) {
- if (bucket_items[buckets[i]].count(buckets[j])) {
- if (bucket_items[buckets[j]].count(buckets[i])) {
- err << "bucket '" << buckets[i] << "' and bucket '"
- << buckets[j] << "' are included each other" << std::endl;
- return -1;
- } else {
- std::iter_swap(bucket_itrer[buckets[i]], bucket_itrer[buckets[j]]);
- }
- }
- }
- }
-
- return 0;
-}
-
-int CrushCompiler::compile(istream& in, const char *infn)
-{
- if (!infn)
- infn = "<input>";
-
- // always start with legacy tunables, so that the compiled result of
- // a given crush file is fixed for all time.
- crush.set_tunables_legacy();
-
- string big;
- string str;
- int line = 1;
- map<int,int> line_pos; // pos -> line
- map<int,string> line_val;
- while (getline(in, str)) {
- // remove newline
- int l = str.length();
- if (l && str[l - 1] == '\n')
- str.erase(l-1, 1);
-
- line_val[line] = str;
-
- // strip comment
- int n = str.find("#");
- if (n >= 0)
- str.erase(n, str.length()-n);
-
- if (verbose>1) err << line << ": " << str << std::endl;
-
- // work around spirit crankiness by removing extraneous
- // whitespace. there is probably a more elegant solution, but
- // this only broke with the latest spirit (with the switchover to
- // "classic"), i don't want to spend too much time figuring it
- // out.
- string stripped = consolidate_whitespace(str);
- if (stripped.length() && big.length() && big[big.length()-1] != ' ') big += " ";
-
- line_pos[big.length()] = line;
- line++;
- big += stripped;
- }
-
- if (verbose > 2) err << "whole file is: \"" << big << "\"" << std::endl;
-
- crush_grammar crushg;
- const char *start = big.c_str();
- //tree_parse_info<const char *> info = ast_parse(start, crushg, space_p);
- tree_parse_info<> info = ast_parse(start, crushg, space_p);
-
- // parse error?
- if (!info.full) {
- int cpos = info.stop - start;
- //out << "cpos " << cpos << std::endl;
- //out << " linemap " << line_pos << std::endl;
- assert(!line_pos.empty());
- map<int,int>::iterator p = line_pos.upper_bound(cpos);
- if (p != line_pos.begin())
- --p;
- int line = p->second;
- int pos = cpos - p->first;
- err << infn << ":" << line //<< ":" << (pos+1)
- << " error: parse error at '" << line_val[line].substr(pos) << "'" << std::endl;
- return -1;
- }
-
- int r = adjust_bucket_item_place(info.trees.begin());
- if (r < 0) {
- return r;
- }
- //out << "parsing succeeded\n";
- //dump(info.trees.begin());
- return parse_crush(info.trees.begin());
-}
Code Review / stor4nfv.git / blobdiff