+++ /dev/null
-// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
-
-#include "include/int_types.h"
-#include "include/buffer.h"
-
-#include <iostream>
-#include <set>
-#include <map>
-#include <string>
-#include "include/memory.h"
-#include <vector>
-
-#include "os/ObjectMap.h"
-#include "kv/KeyValueDB.h"
-#include "DBObjectMap.h"
-#include <errno.h>
-
-#include "common/debug.h"
-#include "common/config.h"
-#include "include/assert.h"
-
-#define dout_context cct
-#define dout_subsys ceph_subsys_filestore
-#undef dout_prefix
-#define dout_prefix *_dout << "filestore "
-
-const string DBObjectMap::USER_PREFIX = "_USER_";
-const string DBObjectMap::XATTR_PREFIX = "_AXATTR_";
-const string DBObjectMap::SYS_PREFIX = "_SYS_";
-const string DBObjectMap::COMPLETE_PREFIX = "_COMPLETE_";
-const string DBObjectMap::HEADER_KEY = "HEADER";
-const string DBObjectMap::USER_HEADER_KEY = "USER_HEADER";
-const string DBObjectMap::GLOBAL_STATE_KEY = "HEADER";
-const string DBObjectMap::HOBJECT_TO_SEQ = "_HOBJTOSEQ_";
-
-// Legacy
-const string DBObjectMap::LEAF_PREFIX = "_LEAF_";
-const string DBObjectMap::REVERSE_LEAF_PREFIX = "_REVLEAF_";
-
-static void append_escaped(const string &in, string *out)
-{
- for (string::const_iterator i = in.begin(); i != in.end(); ++i) {
- if (*i == '%') {
- out->push_back('%');
- out->push_back('p');
- } else if (*i == '.') {
- out->push_back('%');
- out->push_back('e');
- } else if (*i == '_') {
- out->push_back('%');
- out->push_back('u');
- } else {
- out->push_back(*i);
- }
- }
-}
-
-int DBObjectMap::check(std::ostream &out, bool repair, bool force)
-{
- int errors = 0, comp_errors = 0;
- bool repaired = false;
- map<uint64_t, uint64_t> parent_to_num_children;
- map<uint64_t, uint64_t> parent_to_actual_num_children;
- KeyValueDB::Iterator iter = db->get_iterator(HOBJECT_TO_SEQ);
- for (iter->seek_to_first(); iter->valid(); iter->next()) {
- _Header header;
- bufferlist bl = iter->value();
- while (true) {
- bufferlist::iterator bliter = bl.begin();
- header.decode(bliter);
- if (header.seq != 0)
- parent_to_actual_num_children[header.seq] = header.num_children;
-
- if (state.v == 2 || force) {
- // Check complete table
- bool complete_error = false;
- boost::optional<string> prev;
- KeyValueDB::Iterator complete_iter = db->get_iterator(USER_PREFIX + header_key(header.seq) + COMPLETE_PREFIX);
- for (complete_iter->seek_to_first(); complete_iter->valid();
- complete_iter->next()) {
- if (prev && prev >= complete_iter->key()) {
- out << "Bad complete for " << header.oid << std::endl;
- complete_error = true;
- break;
- }
- prev = string(complete_iter->value().c_str(), complete_iter->value().length() - 1);
- }
- if (complete_error) {
- out << "Complete mapping for " << header.seq << " :" << std::endl;
- for (complete_iter->seek_to_first(); complete_iter->valid();
- complete_iter->next()) {
- out << complete_iter->key() << " -> " << string(complete_iter->value().c_str(), complete_iter->value().length() - 1) << std::endl;
- }
- if (repair) {
- repaired = true;
- KeyValueDB::Transaction t = db->get_transaction();
- t->rmkeys_by_prefix(USER_PREFIX + header_key(header.seq) + COMPLETE_PREFIX);
- db->submit_transaction(t);
- out << "Cleared complete mapping to repair" << std::endl;
- } else {
- errors++; // Only count when not repaired
- comp_errors++; // Track errors here for version update
- }
- }
- }
-
- if (header.parent == 0)
- break;
-
- if (!parent_to_num_children.count(header.parent))
- parent_to_num_children[header.parent] = 0;
- parent_to_num_children[header.parent]++;
- if (parent_to_actual_num_children.count(header.parent))
- break;
-
- set<string> to_get;
- map<string, bufferlist> got;
- to_get.insert(HEADER_KEY);
- db->get(sys_parent_prefix(header), to_get, &got);
- if (got.empty()) {
- out << "Missing: seq " << header.parent << std::endl;
- errors++;
- break;
- } else {
- bl = got.begin()->second;
- }
- }
- }
-
- for (map<uint64_t, uint64_t>::iterator i = parent_to_num_children.begin();
- i != parent_to_num_children.end();
- parent_to_num_children.erase(i++)) {
- if (!parent_to_actual_num_children.count(i->first))
- continue;
- if (parent_to_actual_num_children[i->first] != i->second) {
- out << "Invalid: seq " << i->first << " recorded children: "
- << parent_to_actual_num_children[i->first] << " found: "
- << i->second << std::endl;
- errors++;
- }
- parent_to_actual_num_children.erase(i->first);
- }
-
- // Only advance the version from 2 to 3 here
- // Mark as legacy because there are still older structures
- // we don't update. The value of legacy is only used
- // for internal assertions.
- if (comp_errors == 0 && state.v == 2 && repair) {
- state.v = 3;
- state.legacy = true;
- set_state();
- }
-
- if (errors == 0 && repaired)
- return -1;
- return errors;
-}
-
-string DBObjectMap::ghobject_key(const ghobject_t &oid)
-{
- string out;
- append_escaped(oid.hobj.oid.name, &out);
- out.push_back('.');
- append_escaped(oid.hobj.get_key(), &out);
- out.push_back('.');
- append_escaped(oid.hobj.nspace, &out);
- out.push_back('.');
-
- char snap_with_hash[1000];
- char *t = snap_with_hash;
- char *end = t + sizeof(snap_with_hash);
- if (oid.hobj.snap == CEPH_NOSNAP)
- t += snprintf(t, end - t, "head");
- else if (oid.hobj.snap == CEPH_SNAPDIR)
- t += snprintf(t, end - t, "snapdir");
- else
- t += snprintf(t, end - t, "%llx", (long long unsigned)oid.hobj.snap);
-
- if (oid.hobj.pool == -1)
- t += snprintf(t, end - t, ".none");
- else
- t += snprintf(t, end - t, ".%llx", (long long unsigned)oid.hobj.pool);
- t += snprintf(t, end - t, ".%.*X", (int)(sizeof(uint32_t)*2), oid.hobj.get_hash());
-
- if (oid.generation != ghobject_t::NO_GEN ||
- oid.shard_id != shard_id_t::NO_SHARD) {
- t += snprintf(t, end - t, ".%llx", (long long unsigned)oid.generation);
- t += snprintf(t, end - t, ".%x", (int)oid.shard_id);
- }
- out += string(snap_with_hash);
- return out;
-}
-
-// ok: pglog%u3%efs1...0.none.0017B237
-// bad: plana8923501-10...4c.3.ffffffffffffffff.2
-// fixed: plana8923501-10...4c.3.CB767F2D.ffffffffffffffff.2
-// returns 0 for false, 1 for true, negative for error
-int DBObjectMap::is_buggy_ghobject_key_v1(CephContext* cct,
- const string &in)
-{
- int dots = 5; // skip 5 .'s
- const char *s = in.c_str();
- do {
- while (*s && *s != '.')
- ++s;
- if (!*s) {
- derr << "unexpected null at " << (int)(s-in.c_str()) << dendl;
- return -EINVAL;
- }
- ++s;
- } while (*s && --dots);
- if (!*s) {
- derr << "unexpected null at " << (int)(s-in.c_str()) << dendl;
- return -EINVAL;
- }
- // we are now either at a hash value (32 bits, 8 chars) or a generation
- // value (64 bits) '.' and shard id. count the dots!
- int len = 0;
- while (*s && *s != '.') {
- ++s;
- ++len;
- }
- if (*s == '\0') {
- if (len != 8) {
- derr << "hash value is not 8 chars" << dendl;
- return -EINVAL; // the hash value is always 8 chars.
- }
- return 0;
- }
- if (*s != '.') { // the shard follows.
- derr << "missing final . and shard id at " << (int)(s-in.c_str()) << dendl;
- return -EINVAL;
- }
- return 1;
-}
-
-
-string DBObjectMap::map_header_key(const ghobject_t &oid)
-{
- return ghobject_key(oid);
-}
-
-string DBObjectMap::header_key(uint64_t seq)
-{
- char buf[100];
- snprintf(buf, sizeof(buf), "%.*" PRId64, (int)(2*sizeof(seq)), seq);
- return string(buf);
-}
-
-string DBObjectMap::complete_prefix(Header header)
-{
- return USER_PREFIX + header_key(header->seq) + COMPLETE_PREFIX;
-}
-
-string DBObjectMap::user_prefix(Header header)
-{
- return USER_PREFIX + header_key(header->seq) + USER_PREFIX;
-}
-
-string DBObjectMap::sys_prefix(Header header)
-{
- return USER_PREFIX + header_key(header->seq) + SYS_PREFIX;
-}
-
-string DBObjectMap::xattr_prefix(Header header)
-{
- return USER_PREFIX + header_key(header->seq) + XATTR_PREFIX;
-}
-
-string DBObjectMap::sys_parent_prefix(_Header header)
-{
- return USER_PREFIX + header_key(header.parent) + SYS_PREFIX;
-}
-
-int DBObjectMap::DBObjectMapIteratorImpl::init()
-{
- invalid = false;
- if (ready) {
- return 0;
- }
- assert(!parent_iter);
- if (header->parent) {
- Header parent = map->lookup_parent(header);
- if (!parent) {
- ceph_abort();
- return -EINVAL;
- }
- parent_iter = std::make_shared<DBObjectMapIteratorImpl>(map, parent);
- }
- key_iter = map->db->get_iterator(map->user_prefix(header));
- assert(key_iter);
- complete_iter = map->db->get_iterator(map->complete_prefix(header));
- assert(complete_iter);
- cur_iter = key_iter;
- assert(cur_iter);
- ready = true;
- return 0;
-}
-
-ObjectMap::ObjectMapIterator DBObjectMap::get_iterator(
- const ghobject_t &oid)
-{
- MapHeaderLock hl(this, oid);
- Header header = lookup_map_header(hl, oid);
- if (!header)
- return ObjectMapIterator(new EmptyIteratorImpl());
- DBObjectMapIterator iter = _get_iterator(header);
- iter->hlock.swap(hl);
- return iter;
-}
-
-int DBObjectMap::DBObjectMapIteratorImpl::seek_to_first()
-{
- init();
- r = 0;
- if (parent_iter) {
- r = parent_iter->seek_to_first();
- if (r < 0)
- return r;
- }
- r = key_iter->seek_to_first();
- if (r < 0)
- return r;
- return adjust();
-}
-
-int DBObjectMap::DBObjectMapIteratorImpl::seek_to_last()
-{
- init();
- r = 0;
- if (parent_iter) {
- r = parent_iter->seek_to_last();
- if (r < 0)
- return r;
- if (parent_iter->valid())
- r = parent_iter->next();
- if (r < 0)
- return r;
- }
- r = key_iter->seek_to_last();
- if (r < 0)
- return r;
- if (key_iter->valid())
- r = key_iter->next();
- if (r < 0)
- return r;
- return adjust();
-}
-
-int DBObjectMap::DBObjectMapIteratorImpl::lower_bound(const string &to)
-{
- init();
- r = 0;
- if (parent_iter) {
- r = parent_iter->lower_bound(to);
- if (r < 0)
- return r;
- }
- r = key_iter->lower_bound(to);
- if (r < 0)
- return r;
- return adjust();
-}
-
-int DBObjectMap::DBObjectMapIteratorImpl::lower_bound_parent(const string &to)
-{
- int r = lower_bound(to);
- if (r < 0)
- return r;
- if (valid() && !on_parent())
- return next_parent();
- else
- return r;
-}
-
-int DBObjectMap::DBObjectMapIteratorImpl::upper_bound(const string &after)
-{
- init();
- r = 0;
- if (parent_iter) {
- r = parent_iter->upper_bound(after);
- if (r < 0)
- return r;
- }
- r = key_iter->upper_bound(after);
- if (r < 0)
- return r;
- return adjust();
-}
-
-bool DBObjectMap::DBObjectMapIteratorImpl::valid()
-{
- bool valid = !invalid && ready;
- assert(!valid || cur_iter->valid());
- return valid;
-}
-
-bool DBObjectMap::DBObjectMapIteratorImpl::valid_parent()
-{
- if (parent_iter && parent_iter->valid() &&
- (!key_iter->valid() || key_iter->key() > parent_iter->key()))
- return true;
- return false;
-}
-
-int DBObjectMap::DBObjectMapIteratorImpl::next(bool validate)
-{
- assert(cur_iter->valid());
- assert(valid());
- cur_iter->next();
- return adjust();
-}
-
-int DBObjectMap::DBObjectMapIteratorImpl::next_parent()
-{
- r = next();
- if (r < 0)
- return r;
- while (parent_iter && parent_iter->valid() && !on_parent()) {
- assert(valid());
- r = lower_bound(parent_iter->key());
- if (r < 0)
- return r;
- }
-
- if (!parent_iter || !parent_iter->valid()) {
- invalid = true;
- }
- return 0;
-}
-
-int DBObjectMap::DBObjectMapIteratorImpl::in_complete_region(const string &to_test,
- string *begin,
- string *end)
-{
- /* This is clumsy because one cannot call prev() on end(), nor can one
- * test for == begin().
- */
- complete_iter->upper_bound(to_test);
- if (complete_iter->valid()) {
- complete_iter->prev();
- if (!complete_iter->valid()) {
- complete_iter->upper_bound(to_test);
- return false;
- }
- } else {
- complete_iter->seek_to_last();
- if (!complete_iter->valid())
- return false;
- }
-
- assert(complete_iter->key() <= to_test);
- assert(complete_iter->value().length() >= 1);
- string _end(complete_iter->value().c_str(),
- complete_iter->value().length() - 1);
- if (_end.empty() || _end > to_test) {
- if (begin)
- *begin = complete_iter->key();
- if (end)
- *end = _end;
- return true;
- } else {
- complete_iter->next();
- assert(!complete_iter->valid() || complete_iter->key() > to_test);
- return false;
- }
-}
-
-/**
- * Moves parent_iter to the next position both out of the complete_region and
- * not equal to key_iter. Then, we set cur_iter to parent_iter if valid and
- * less than key_iter and key_iter otherwise.
- */
-int DBObjectMap::DBObjectMapIteratorImpl::adjust()
-{
- string begin, end;
- while (parent_iter && parent_iter->valid()) {
- if (in_complete_region(parent_iter->key(), &begin, &end)) {
- if (end.size() == 0) {
- parent_iter->seek_to_last();
- if (parent_iter->valid())
- parent_iter->next();
- } else
- parent_iter->lower_bound(end);
- } else if (key_iter->valid() && key_iter->key() == parent_iter->key()) {
- parent_iter->next();
- } else {
- break;
- }
- }
- if (valid_parent()) {
- cur_iter = parent_iter;
- } else if (key_iter->valid()) {
- cur_iter = key_iter;
- } else {
- invalid = true;
- }
- assert(invalid || cur_iter->valid());
- return 0;
-}
-
-
-string DBObjectMap::DBObjectMapIteratorImpl::key()
-{
- return cur_iter->key();
-}
-
-bufferlist DBObjectMap::DBObjectMapIteratorImpl::value()
-{
- return cur_iter->value();
-}
-
-int DBObjectMap::DBObjectMapIteratorImpl::status()
-{
- return r;
-}
-
-int DBObjectMap::set_keys(const ghobject_t &oid,
- const map<string, bufferlist> &set,
- const SequencerPosition *spos)
-{
- KeyValueDB::Transaction t = db->get_transaction();
- MapHeaderLock hl(this, oid);
- Header header = lookup_create_map_header(hl, oid, t);
- if (!header)
- return -EINVAL;
- if (check_spos(oid, header, spos))
- return 0;
-
- t->set(user_prefix(header), set);
-
- return db->submit_transaction(t);
-}
-
-int DBObjectMap::set_header(const ghobject_t &oid,
- const bufferlist &bl,
- const SequencerPosition *spos)
-{
- KeyValueDB::Transaction t = db->get_transaction();
- MapHeaderLock hl(this, oid);
- Header header = lookup_create_map_header(hl, oid, t);
- if (!header)
- return -EINVAL;
- if (check_spos(oid, header, spos))
- return 0;
- _set_header(header, bl, t);
- return db->submit_transaction(t);
-}
-
-void DBObjectMap::_set_header(Header header, const bufferlist &bl,
- KeyValueDB::Transaction t)
-{
- map<string, bufferlist> to_set;
- to_set[USER_HEADER_KEY] = bl;
- t->set(sys_prefix(header), to_set);
-}
-
-int DBObjectMap::get_header(const ghobject_t &oid,
- bufferlist *bl)
-{
- MapHeaderLock hl(this, oid);
- Header header = lookup_map_header(hl, oid);
- if (!header) {
- return 0;
- }
- return _get_header(header, bl);
-}
-
-int DBObjectMap::_get_header(Header header,
- bufferlist *bl)
-{
- map<string, bufferlist> out;
- while (true) {
- out.clear();
- set<string> to_get;
- to_get.insert(USER_HEADER_KEY);
- int r = db->get(sys_prefix(header), to_get, &out);
- if (r == 0 && !out.empty())
- break;
- if (r < 0)
- return r;
- Header current(header);
- if (!current->parent)
- break;
- header = lookup_parent(current);
- }
-
- if (!out.empty())
- bl->swap(out.begin()->second);
- return 0;
-}
-
-int DBObjectMap::clear(const ghobject_t &oid,
- const SequencerPosition *spos)
-{
- KeyValueDB::Transaction t = db->get_transaction();
- MapHeaderLock hl(this, oid);
- Header header = lookup_map_header(hl, oid);
- if (!header)
- return -ENOENT;
- if (check_spos(oid, header, spos))
- return 0;
- remove_map_header(hl, oid, header, t);
- assert(header->num_children > 0);
- header->num_children--;
- int r = _clear(header, t);
- if (r < 0)
- return r;
- return db->submit_transaction(t);
-}
-
-int DBObjectMap::_clear(Header header,
- KeyValueDB::Transaction t)
-{
- while (1) {
- if (header->num_children) {
- set_header(header, t);
- break;
- }
- clear_header(header, t);
- if (!header->parent)
- break;
- Header parent = lookup_parent(header);
- if (!parent) {
- return -EINVAL;
- }
- assert(parent->num_children > 0);
- parent->num_children--;
- header.swap(parent);
- }
- return 0;
-}
-
-int DBObjectMap::copy_up_header(Header header,
- KeyValueDB::Transaction t)
-{
- bufferlist bl;
- int r = _get_header(header, &bl);
- if (r < 0)
- return r;
-
- _set_header(header, bl, t);
- return 0;
-}
-
-int DBObjectMap::rm_keys(const ghobject_t &oid,
- const set<string> &to_clear,
- const SequencerPosition *spos)
-{
- MapHeaderLock hl(this, oid);
- Header header = lookup_map_header(hl, oid);
- if (!header)
- return -ENOENT;
- KeyValueDB::Transaction t = db->get_transaction();
- if (check_spos(oid, header, spos))
- return 0;
- t->rmkeys(user_prefix(header), to_clear);
- if (!header->parent) {
- return db->submit_transaction(t);
- }
-
- assert(state.legacy);
-
- {
- // We only get here for legacy (v2) stores
- // Copy up all keys from parent excluding to_clear
- // and remove parent
- // This eliminates a v2 format use of complete for this oid only
- map<string, bufferlist> to_write;
- ObjectMapIterator iter = _get_iterator(header);
- for (iter->seek_to_first() ; iter->valid() ; iter->next()) {
- if (iter->status())
- return iter->status();
- if (!to_clear.count(iter->key()))
- to_write[iter->key()] = iter->value();
- }
- t->set(user_prefix(header), to_write);
- } // destruct iter which has parent in_use
-
- copy_up_header(header, t);
- Header parent = lookup_parent(header);
- if (!parent)
- return -EINVAL;
- parent->num_children--;
- _clear(parent, t);
- header->parent = 0;
- set_map_header(hl, oid, *header, t);
- t->rmkeys_by_prefix(complete_prefix(header));
- return db->submit_transaction(t);
-}
-
-int DBObjectMap::clear_keys_header(const ghobject_t &oid,
- const SequencerPosition *spos)
-{
- KeyValueDB::Transaction t = db->get_transaction();
- MapHeaderLock hl(this, oid);
- Header header = lookup_map_header(hl, oid);
- if (!header)
- return -ENOENT;
- if (check_spos(oid, header, spos))
- return 0;
-
- // save old attrs
- KeyValueDB::Iterator iter = db->get_iterator(xattr_prefix(header));
- if (!iter)
- return -EINVAL;
- map<string, bufferlist> attrs;
- for (iter->seek_to_first(); !iter->status() && iter->valid(); iter->next())
- attrs.insert(make_pair(iter->key(), iter->value()));
- if (iter->status())
- return iter->status();
-
- // remove current header
- remove_map_header(hl, oid, header, t);
- assert(header->num_children > 0);
- header->num_children--;
- int r = _clear(header, t);
- if (r < 0)
- return r;
-
- // create new header
- Header newheader = generate_new_header(oid, Header());
- set_map_header(hl, oid, *newheader, t);
- if (!attrs.empty())
- t->set(xattr_prefix(newheader), attrs);
- return db->submit_transaction(t);
-}
-
-int DBObjectMap::get(const ghobject_t &oid,
- bufferlist *_header,
- map<string, bufferlist> *out)
-{
- MapHeaderLock hl(this, oid);
- Header header = lookup_map_header(hl, oid);
- if (!header)
- return -ENOENT;
- _get_header(header, _header);
- ObjectMapIterator iter = _get_iterator(header);
- for (iter->seek_to_first(); iter->valid(); iter->next()) {
- if (iter->status())
- return iter->status();
- out->insert(make_pair(iter->key(), iter->value()));
- }
- return 0;
-}
-
-int DBObjectMap::get_keys(const ghobject_t &oid,
- set<string> *keys)
-{
- MapHeaderLock hl(this, oid);
- Header header = lookup_map_header(hl, oid);
- if (!header)
- return -ENOENT;
- ObjectMapIterator iter = _get_iterator(header);
- for (iter->seek_to_first(); iter->valid(); iter->next()) {
- if (iter->status())
- return iter->status();
- keys->insert(iter->key());
- }
- return 0;
-}
-
-int DBObjectMap::scan(Header header,
- const set<string> &in_keys,
- set<string> *out_keys,
- map<string, bufferlist> *out_values)
-{
- ObjectMapIterator db_iter = _get_iterator(header);
- for (set<string>::const_iterator key_iter = in_keys.begin();
- key_iter != in_keys.end();
- ++key_iter) {
- db_iter->lower_bound(*key_iter);
- if (db_iter->status())
- return db_iter->status();
- if (db_iter->valid() && db_iter->key() == *key_iter) {
- if (out_keys)
- out_keys->insert(*key_iter);
- if (out_values)
- out_values->insert(make_pair(db_iter->key(), db_iter->value()));
- }
- }
- return 0;
-}
-
-int DBObjectMap::get_values(const ghobject_t &oid,
- const set<string> &keys,
- map<string, bufferlist> *out)
-{
- MapHeaderLock hl(this, oid);
- Header header = lookup_map_header(hl, oid);
- if (!header)
- return -ENOENT;
- return scan(header, keys, 0, out);
-}
-
-int DBObjectMap::check_keys(const ghobject_t &oid,
- const set<string> &keys,
- set<string> *out)
-{
- MapHeaderLock hl(this, oid);
- Header header = lookup_map_header(hl, oid);
- if (!header)
- return -ENOENT;
- return scan(header, keys, out, 0);
-}
-
-int DBObjectMap::get_xattrs(const ghobject_t &oid,
- const set<string> &to_get,
- map<string, bufferlist> *out)
-{
- MapHeaderLock hl(this, oid);
- Header header = lookup_map_header(hl, oid);
- if (!header)
- return -ENOENT;
- return db->get(xattr_prefix(header), to_get, out);
-}
-
-int DBObjectMap::get_all_xattrs(const ghobject_t &oid,
- set<string> *out)
-{
- MapHeaderLock hl(this, oid);
- Header header = lookup_map_header(hl, oid);
- if (!header)
- return -ENOENT;
- KeyValueDB::Iterator iter = db->get_iterator(xattr_prefix(header));
- if (!iter)
- return -EINVAL;
- for (iter->seek_to_first(); !iter->status() && iter->valid(); iter->next())
- out->insert(iter->key());
- return iter->status();
-}
-
-int DBObjectMap::set_xattrs(const ghobject_t &oid,
- const map<string, bufferlist> &to_set,
- const SequencerPosition *spos)
-{
- KeyValueDB::Transaction t = db->get_transaction();
- MapHeaderLock hl(this, oid);
- Header header = lookup_create_map_header(hl, oid, t);
- if (!header)
- return -EINVAL;
- if (check_spos(oid, header, spos))
- return 0;
- t->set(xattr_prefix(header), to_set);
- return db->submit_transaction(t);
-}
-
-int DBObjectMap::remove_xattrs(const ghobject_t &oid,
- const set<string> &to_remove,
- const SequencerPosition *spos)
-{
- KeyValueDB::Transaction t = db->get_transaction();
- MapHeaderLock hl(this, oid);
- Header header = lookup_map_header(hl, oid);
- if (!header)
- return -ENOENT;
- if (check_spos(oid, header, spos))
- return 0;
- t->rmkeys(xattr_prefix(header), to_remove);
- return db->submit_transaction(t);
-}
-
-// ONLY USED FOR TESTING
-// Set version to 2 to avoid asserts
-int DBObjectMap::legacy_clone(const ghobject_t &oid,
- const ghobject_t &target,
- const SequencerPosition *spos)
-{
- state.legacy = true;
-
- if (oid == target)
- return 0;
-
- MapHeaderLock _l1(this, std::min(oid, target));
- MapHeaderLock _l2(this, std::max(oid, target));
- MapHeaderLock *lsource, *ltarget;
- if (oid > target) {
- lsource = &_l2;
- ltarget= &_l1;
- } else {
- lsource = &_l1;
- ltarget= &_l2;
- }
-
- KeyValueDB::Transaction t = db->get_transaction();
- {
- Header destination = lookup_map_header(*ltarget, target);
- if (destination) {
- if (check_spos(target, destination, spos))
- return 0;
- destination->num_children--;
- remove_map_header(*ltarget, target, destination, t);
- _clear(destination, t);
- }
- }
-
- Header parent = lookup_map_header(*lsource, oid);
- if (!parent)
- return db->submit_transaction(t);
-
- Header source = generate_new_header(oid, parent);
- Header destination = generate_new_header(target, parent);
- if (spos)
- destination->spos = *spos;
-
- parent->num_children = 2;
- set_header(parent, t);
- set_map_header(*lsource, oid, *source, t);
- set_map_header(*ltarget, target, *destination, t);
-
- map<string, bufferlist> to_set;
- KeyValueDB::Iterator xattr_iter = db->get_iterator(xattr_prefix(parent));
- for (xattr_iter->seek_to_first();
- xattr_iter->valid();
- xattr_iter->next())
- to_set.insert(make_pair(xattr_iter->key(), xattr_iter->value()));
- t->set(xattr_prefix(source), to_set);
- t->set(xattr_prefix(destination), to_set);
- t->rmkeys_by_prefix(xattr_prefix(parent));
- return db->submit_transaction(t);
-}
-
-int DBObjectMap::clone(const ghobject_t &oid,
- const ghobject_t &target,
- const SequencerPosition *spos)
-{
- if (oid == target)
- return 0;
-
- MapHeaderLock _l1(this, std::min(oid, target));
- MapHeaderLock _l2(this, std::max(oid, target));
- MapHeaderLock *lsource, *ltarget;
- if (oid > target) {
- lsource = &_l2;
- ltarget= &_l1;
- } else {
- lsource = &_l1;
- ltarget= &_l2;
- }
-
- KeyValueDB::Transaction t = db->get_transaction();
- {
- Header destination = lookup_map_header(*ltarget, target);
- if (destination) {
- if (check_spos(target, destination, spos))
- return 0;
- destination->num_children--;
- remove_map_header(*ltarget, target, destination, t);
- _clear(destination, t);
- }
- }
-
- Header source = lookup_map_header(*lsource, oid);
- if (!source)
- return db->submit_transaction(t);
-
- Header destination = generate_new_header(target, Header());
- if (spos)
- destination->spos = *spos;
-
- set_map_header(*ltarget, target, *destination, t);
-
- bufferlist bl;
- int r = _get_header(source, &bl);
- if (r < 0)
- return r;
- _set_header(destination, bl, t);
-
- map<string, bufferlist> to_set;
- KeyValueDB::Iterator xattr_iter = db->get_iterator(xattr_prefix(source));
- for (xattr_iter->seek_to_first();
- xattr_iter->valid();
- xattr_iter->next())
- to_set.insert(make_pair(xattr_iter->key(), xattr_iter->value()));
- t->set(xattr_prefix(destination), to_set);
-
- map<string, bufferlist> to_write;
- ObjectMapIterator iter = _get_iterator(source);
- for (iter->seek_to_first() ; iter->valid() ; iter->next()) {
- if (iter->status())
- return iter->status();
- to_write[iter->key()] = iter->value();
- }
- t->set(user_prefix(destination), to_write);
-
- return db->submit_transaction(t);
-}
-
-int DBObjectMap::upgrade_to_v2()
-{
- dout(1) << __func__ << " start" << dendl;
- KeyValueDB::Iterator iter = db->get_iterator(HOBJECT_TO_SEQ);
- iter->seek_to_first();
- while (iter->valid()) {
- unsigned count = 0;
- KeyValueDB::Transaction t = db->get_transaction();
- set<string> remove;
- map<string, bufferlist> add;
- for (;
- iter->valid() && count < 300;
- iter->next()) {
- dout(20) << __func__ << " key is " << iter->key() << dendl;
- int r = is_buggy_ghobject_key_v1(cct, iter->key());
- if (r < 0) {
- derr << __func__ << " bad key '" << iter->key() << "'" << dendl;
- return r;
- }
- if (!r) {
- dout(20) << __func__ << " " << iter->key() << " ok" << dendl;
- continue;
- }
-
- // decode header to get oid
- _Header hdr;
- bufferlist bl = iter->value();
- bufferlist::iterator bliter = bl.begin();
- hdr.decode(bliter);
-
- string newkey(ghobject_key(hdr.oid));
- dout(20) << __func__ << " " << iter->key() << " -> " << newkey << dendl;
- add[newkey] = iter->value();
- remove.insert(iter->key());
- ++count;
- }
-
- if (!remove.empty()) {
- dout(20) << __func__ << " updating " << remove.size() << " keys" << dendl;
- t->rmkeys(HOBJECT_TO_SEQ, remove);
- t->set(HOBJECT_TO_SEQ, add);
- int r = db->submit_transaction(t);
- if (r < 0)
- return r;
- }
- }
-
- state.v = 2;
-
- set_state();
- return 0;
-}
-
-void DBObjectMap::set_state()
-{
- Mutex::Locker l(header_lock);
- KeyValueDB::Transaction t = db->get_transaction();
- write_state(t);
- int ret = db->submit_transaction_sync(t);
- assert(ret == 0);
- dout(1) << __func__ << " done" << dendl;
- return;
-}
-
-int DBObjectMap::get_state()
-{
- map<string, bufferlist> result;
- set<string> to_get;
- to_get.insert(GLOBAL_STATE_KEY);
- int r = db->get(SYS_PREFIX, to_get, &result);
- if (r < 0)
- return r;
- if (!result.empty()) {
- bufferlist::iterator bliter = result.begin()->second.begin();
- state.decode(bliter);
- } else {
- // New store
- state.v = State::CUR_VERSION;
- state.seq = 1;
- state.legacy = false;
- }
- return 0;
-}
-
-int DBObjectMap::init(bool do_upgrade)
-{
- int ret = get_state();
- if (ret < 0)
- return ret;
- if (state.v < 1) {
- dout(1) << "DBObjectMap is *very* old; upgrade to an older version first"
- << dendl;
- return -ENOTSUP;
- }
- if (state.v < 2) { // Needs upgrade
- if (!do_upgrade) {
- dout(1) << "DOBjbectMap requires an upgrade,"
- << " set filestore_update_to"
- << dendl;
- return -ENOTSUP;
- } else {
- int r = upgrade_to_v2();
- if (r < 0)
- return r;
- }
- }
- ostringstream ss;
- int errors = check(ss, true);
- if (errors) {
- derr << ss.str() << dendl;
- if (errors > 0)
- return -EINVAL;
- }
- dout(20) << "(init)dbobjectmap: seq is " << state.seq << dendl;
- return 0;
-}
-
-int DBObjectMap::sync(const ghobject_t *oid,
- const SequencerPosition *spos) {
- KeyValueDB::Transaction t = db->get_transaction();
- if (oid) {
- assert(spos);
- MapHeaderLock hl(this, *oid);
- Header header = lookup_map_header(hl, *oid);
- if (header) {
- dout(10) << "oid: " << *oid << " setting spos to "
- << *spos << dendl;
- header->spos = *spos;
- set_map_header(hl, *oid, *header, t);
- }
- /* It may appear that this and the identical portion of the else
- * block can combined below, but in this block, the transaction
- * must be submitted under *both* the MapHeaderLock and the full
- * header_lock.
- *
- * See 2b63dd25fc1c73fa42e52e9ea4ab5a45dd9422a0 and bug 9891.
- */
- Mutex::Locker l(header_lock);
- write_state(t);
- return db->submit_transaction_sync(t);
- } else {
- Mutex::Locker l(header_lock);
- write_state(t);
- return db->submit_transaction_sync(t);
- }
-}
-
-int DBObjectMap::write_state(KeyValueDB::Transaction _t) {
- assert(header_lock.is_locked_by_me());
- dout(20) << "dbobjectmap: seq is " << state.seq << dendl;
- KeyValueDB::Transaction t = _t ? _t : db->get_transaction();
- bufferlist bl;
- state.encode(bl);
- map<string, bufferlist> to_write;
- to_write[GLOBAL_STATE_KEY] = bl;
- t->set(SYS_PREFIX, to_write);
- return _t ? 0 : db->submit_transaction(t);
-}
-
-
-DBObjectMap::Header DBObjectMap::_lookup_map_header(
- const MapHeaderLock &l,
- const ghobject_t &oid)
-{
- assert(l.get_locked() == oid);
-
- _Header *header = new _Header();
- {
- Mutex::Locker l(cache_lock);
- if (caches.lookup(oid, header)) {
- assert(!in_use.count(header->seq));
- in_use.insert(header->seq);
- return Header(header, RemoveOnDelete(this));
- }
- }
-
- bufferlist out;
- int r = db->get(HOBJECT_TO_SEQ, map_header_key(oid), &out);
- if (r < 0 || out.length()==0) {
- delete header;
- return Header();
- }
-
- Header ret(header, RemoveOnDelete(this));
- bufferlist::iterator iter = out.begin();
-
- ret->decode(iter);
- {
- Mutex::Locker l(cache_lock);
- caches.add(oid, *ret);
- }
-
- assert(!in_use.count(header->seq));
- in_use.insert(header->seq);
- return ret;
-}
-
-DBObjectMap::Header DBObjectMap::_generate_new_header(const ghobject_t &oid,
- Header parent)
-{
- Header header = Header(new _Header(), RemoveOnDelete(this));
- header->seq = state.seq++;
- if (parent) {
- header->parent = parent->seq;
- header->spos = parent->spos;
- }
- header->num_children = 1;
- header->oid = oid;
- assert(!in_use.count(header->seq));
- in_use.insert(header->seq);
-
- write_state();
- return header;
-}
-
-DBObjectMap::Header DBObjectMap::lookup_parent(Header input)
-{
- Mutex::Locker l(header_lock);
- while (in_use.count(input->parent))
- header_cond.Wait(header_lock);
- map<string, bufferlist> out;
- set<string> keys;
- keys.insert(HEADER_KEY);
-
- dout(20) << "lookup_parent: parent " << input->parent
- << " for seq " << input->seq << dendl;
- int r = db->get(sys_parent_prefix(input), keys, &out);
- if (r < 0) {
- ceph_abort();
- return Header();
- }
- if (out.empty()) {
- ceph_abort();
- return Header();
- }
-
- Header header = Header(new _Header(), RemoveOnDelete(this));
- bufferlist::iterator iter = out.begin()->second.begin();
- header->decode(iter);
- assert(header->seq == input->parent);
- dout(20) << "lookup_parent: parent seq is " << header->seq << " with parent "
- << header->parent << dendl;
- in_use.insert(header->seq);
- return header;
-}
-
-DBObjectMap::Header DBObjectMap::lookup_create_map_header(
- const MapHeaderLock &hl,
- const ghobject_t &oid,
- KeyValueDB::Transaction t)
-{
- Mutex::Locker l(header_lock);
- Header header = _lookup_map_header(hl, oid);
- if (!header) {
- header = _generate_new_header(oid, Header());
- set_map_header(hl, oid, *header, t);
- }
- return header;
-}
-
-void DBObjectMap::clear_header(Header header, KeyValueDB::Transaction t)
-{
- dout(20) << "clear_header: clearing seq " << header->seq << dendl;
- t->rmkeys_by_prefix(user_prefix(header));
- t->rmkeys_by_prefix(sys_prefix(header));
- if (state.legacy)
- t->rmkeys_by_prefix(complete_prefix(header)); // Needed when header.parent != 0
- t->rmkeys_by_prefix(xattr_prefix(header));
- set<string> keys;
- keys.insert(header_key(header->seq));
- t->rmkeys(USER_PREFIX, keys);
-}
-
-void DBObjectMap::set_header(Header header, KeyValueDB::Transaction t)
-{
- dout(20) << "set_header: setting seq " << header->seq << dendl;
- map<string, bufferlist> to_write;
- header->encode(to_write[HEADER_KEY]);
- t->set(sys_prefix(header), to_write);
-}
-
-void DBObjectMap::remove_map_header(
- const MapHeaderLock &l,
- const ghobject_t &oid,
- Header header,
- KeyValueDB::Transaction t)
-{
- assert(l.get_locked() == oid);
- dout(20) << "remove_map_header: removing " << header->seq
- << " oid " << oid << dendl;
- set<string> to_remove;
- to_remove.insert(map_header_key(oid));
- t->rmkeys(HOBJECT_TO_SEQ, to_remove);
- {
- Mutex::Locker l(cache_lock);
- caches.clear(oid);
- }
-}
-
-void DBObjectMap::set_map_header(
- const MapHeaderLock &l,
- const ghobject_t &oid, _Header header,
- KeyValueDB::Transaction t)
-{
- assert(l.get_locked() == oid);
- dout(20) << "set_map_header: setting " << header.seq
- << " oid " << oid << " parent seq "
- << header.parent << dendl;
- map<string, bufferlist> to_set;
- header.encode(to_set[map_header_key(oid)]);
- t->set(HOBJECT_TO_SEQ, to_set);
- {
- Mutex::Locker l(cache_lock);
- caches.add(oid, header);
- }
-}
-
-bool DBObjectMap::check_spos(const ghobject_t &oid,
- Header header,
- const SequencerPosition *spos)
-{
- if (!spos || *spos > header->spos) {
- stringstream out;
- if (spos)
- dout(10) << "oid: " << oid << " not skipping op, *spos "
- << *spos << dendl;
- else
- dout(10) << "oid: " << oid << " not skipping op, *spos "
- << "empty" << dendl;
- dout(10) << " > header.spos " << header->spos << dendl;
- return false;
- } else {
- dout(10) << "oid: " << oid << " skipping op, *spos " << *spos
- << " <= header.spos " << header->spos << dendl;
- return true;
- }
-}
-
-int DBObjectMap::list_objects(vector<ghobject_t> *out)
-{
- KeyValueDB::Iterator iter = db->get_iterator(HOBJECT_TO_SEQ);
- for (iter->seek_to_first(); iter->valid(); iter->next()) {
- bufferlist bl = iter->value();
- bufferlist::iterator bliter = bl.begin();
- _Header header;
- header.decode(bliter);
- out->push_back(header.oid);
- }
- return 0;
-}
-
-int DBObjectMap::list_object_headers(vector<_Header> *out)
-{
- int error = 0;
- KeyValueDB::Iterator iter = db->get_iterator(HOBJECT_TO_SEQ);
- for (iter->seek_to_first(); iter->valid(); iter->next()) {
- bufferlist bl = iter->value();
- bufferlist::iterator bliter = bl.begin();
- _Header header;
- header.decode(bliter);
- out->push_back(header);
- while (header.parent) {
- set<string> to_get;
- map<string, bufferlist> got;
- to_get.insert(HEADER_KEY);
- db->get(sys_parent_prefix(header), to_get, &got);
- if (got.empty()) {
- dout(0) << "Missing: seq " << header.parent << dendl;
- error = -ENOENT;
- break;
- } else {
- bl = got.begin()->second;
- bufferlist::iterator bliter = bl.begin();
- header.decode(bliter);
- out->push_back(header);
- }
- }
- }
- return error;
-}
-
-ostream& operator<<(ostream& out, const DBObjectMap::_Header& h)
-{
- out << "seq=" << h.seq << " parent=" << h.parent
- << " num_children=" << h.num_children
- << " ghobject=" << h.oid;
- return out;
-}
-
-int DBObjectMap::rename(const ghobject_t &from,
- const ghobject_t &to,
- const SequencerPosition *spos)
-{
- if (from == to)
- return 0;
-
- MapHeaderLock _l1(this, std::min(from, to));
- MapHeaderLock _l2(this, std::max(from, to));
- MapHeaderLock *lsource, *ltarget;
- if (from > to) {
- lsource = &_l2;
- ltarget= &_l1;
- } else {
- lsource = &_l1;
- ltarget= &_l2;
- }
-
- KeyValueDB::Transaction t = db->get_transaction();
- {
- Header destination = lookup_map_header(*ltarget, to);
- if (destination) {
- if (check_spos(to, destination, spos))
- return 0;
- destination->num_children--;
- remove_map_header(*ltarget, to, destination, t);
- _clear(destination, t);
- }
- }
-
- Header hdr = lookup_map_header(*lsource, from);
- if (!hdr)
- return db->submit_transaction(t);
-
- remove_map_header(*lsource, from, hdr, t);
- hdr->oid = to;
- set_map_header(*ltarget, to, *hdr, t);
-
- return db->submit_transaction(t);
-}
Code Review / stor4nfv.git / blobdiff