+++ /dev/null
-// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
-// vim: ts=8 sw=2 smarttab
-/*
- * Ceph - scalable distributed file system
- *
- * Copyright (C) 2013 Inktank
- *
- * This is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License version 2.1, as published by the Free Software
- * Foundation. See file COPYING.
- *
- */
-#include "acconfig.h"
-
-#ifdef HAVE_SYS_MOUNT_H
-#include <sys/mount.h>
-#endif
-
-#ifdef HAVE_SYS_PARAM_H
-#include <sys/param.h>
-#endif
-
-#include "include/types.h"
-#include "include/stringify.h"
-#include "include/unordered_map.h"
-#include "include/memory.h"
-#include "common/errno.h"
-#include "MemStore.h"
-#include "include/compat.h"
-
-#define dout_context cct
-#define dout_subsys ceph_subsys_filestore
-#undef dout_prefix
-#define dout_prefix *_dout << "memstore(" << path << ") "
-
-// for comparing collections for lock ordering
-bool operator>(const MemStore::CollectionRef& l,
- const MemStore::CollectionRef& r)
-{
- return (unsigned long)l.get() > (unsigned long)r.get();
-}
-
-
-int MemStore::mount()
-{
- int r = _load();
- if (r < 0)
- return r;
- finisher.start();
- return 0;
-}
-
-int MemStore::umount()
-{
- finisher.wait_for_empty();
- finisher.stop();
- return _save();
-}
-
-int MemStore::_save()
-{
- dout(10) << __func__ << dendl;
- dump_all();
- set<coll_t> collections;
- for (ceph::unordered_map<coll_t,CollectionRef>::iterator p = coll_map.begin();
- p != coll_map.end();
- ++p) {
- dout(20) << __func__ << " coll " << p->first << " " << p->second << dendl;
- collections.insert(p->first);
- bufferlist bl;
- assert(p->second);
- p->second->encode(bl);
- string fn = path + "/" + stringify(p->first);
- int r = bl.write_file(fn.c_str());
- if (r < 0)
- return r;
- }
-
- string fn = path + "/collections";
- bufferlist bl;
- ::encode(collections, bl);
- int r = bl.write_file(fn.c_str());
- if (r < 0)
- return r;
-
- return 0;
-}
-
-void MemStore::dump_all()
-{
- Formatter *f = Formatter::create("json-pretty");
- f->open_object_section("store");
- dump(f);
- f->close_section();
- dout(0) << "dump:";
- f->flush(*_dout);
- *_dout << dendl;
- delete f;
-}
-
-void MemStore::dump(Formatter *f)
-{
- f->open_array_section("collections");
- for (ceph::unordered_map<coll_t,CollectionRef>::iterator p = coll_map.begin();
- p != coll_map.end();
- ++p) {
- f->open_object_section("collection");
- f->dump_string("name", stringify(p->first));
-
- f->open_array_section("xattrs");
- for (map<string,bufferptr>::iterator q = p->second->xattr.begin();
- q != p->second->xattr.end();
- ++q) {
- f->open_object_section("xattr");
- f->dump_string("name", q->first);
- f->dump_int("length", q->second.length());
- f->close_section();
- }
- f->close_section();
-
- f->open_array_section("objects");
- for (map<ghobject_t,ObjectRef>::iterator q = p->second->object_map.begin();
- q != p->second->object_map.end();
- ++q) {
- f->open_object_section("object");
- f->dump_string("name", stringify(q->first));
- if (q->second)
- q->second->dump(f);
- f->close_section();
- }
- f->close_section();
-
- f->close_section();
- }
- f->close_section();
-}
-
-int MemStore::_load()
-{
- dout(10) << __func__ << dendl;
- bufferlist bl;
- string fn = path + "/collections";
- string err;
- int r = bl.read_file(fn.c_str(), &err);
- if (r < 0)
- return r;
-
- set<coll_t> collections;
- bufferlist::iterator p = bl.begin();
- ::decode(collections, p);
-
- for (set<coll_t>::iterator q = collections.begin();
- q != collections.end();
- ++q) {
- string fn = path + "/" + stringify(*q);
- bufferlist cbl;
- int r = cbl.read_file(fn.c_str(), &err);
- if (r < 0)
- return r;
- CollectionRef c(new Collection(cct, *q));
- bufferlist::iterator p = cbl.begin();
- c->decode(p);
- coll_map[*q] = c;
- used_bytes += c->used_bytes();
- }
-
- dump_all();
-
- return 0;
-}
-
-void MemStore::set_fsid(uuid_d u)
-{
- int r = write_meta("fs_fsid", stringify(u));
- assert(r >= 0);
-}
-
-uuid_d MemStore::get_fsid()
-{
- string fsid_str;
- int r = read_meta("fs_fsid", &fsid_str);
- assert(r >= 0);
- uuid_d uuid;
- bool b = uuid.parse(fsid_str.c_str());
- assert(b);
- return uuid;
-}
-
-int MemStore::mkfs()
-{
- string fsid_str;
- int r = read_meta("fs_fsid", &fsid_str);
- if (r == -ENOENT) {
- uuid_d fsid;
- fsid.generate_random();
- fsid_str = stringify(fsid);
- r = write_meta("fs_fsid", fsid_str);
- if (r < 0)
- return r;
- dout(1) << __func__ << " new fsid " << fsid_str << dendl;
- } else if (r < 0) {
- return r;
- } else {
- dout(1) << __func__ << " had fsid " << fsid_str << dendl;
- }
-
- string fn = path + "/collections";
- derr << path << dendl;
- bufferlist bl;
- set<coll_t> collections;
- ::encode(collections, bl);
- r = bl.write_file(fn.c_str());
- if (r < 0)
- return r;
-
- r = write_meta("type", "memstore");
- if (r < 0)
- return r;
-
- return 0;
-}
-
-int MemStore::statfs(struct store_statfs_t *st)
-{
- dout(10) << __func__ << dendl;
- st->reset();
- st->total = cct->_conf->memstore_device_bytes;
- st->available = MAX(int64_t(st->total) - int64_t(used_bytes), 0ll);
- dout(10) << __func__ << ": used_bytes: " << used_bytes
- << "/" << cct->_conf->memstore_device_bytes << dendl;
- return 0;
-}
-
-objectstore_perf_stat_t MemStore::get_cur_stats()
-{
- // fixme
- return objectstore_perf_stat_t();
-}
-
-MemStore::CollectionRef MemStore::get_collection(const coll_t& cid)
-{
- RWLock::RLocker l(coll_lock);
- ceph::unordered_map<coll_t,CollectionRef>::iterator cp = coll_map.find(cid);
- if (cp == coll_map.end())
- return CollectionRef();
- return cp->second;
-}
-
-
-// ---------------
-// read operations
-
-bool MemStore::exists(const coll_t& cid, const ghobject_t& oid)
-{
- CollectionHandle c = get_collection(cid);
- if (!c)
- return false;
- return exists(c, oid);
-}
-
-bool MemStore::exists(CollectionHandle &c_, const ghobject_t& oid)
-{
- Collection *c = static_cast<Collection*>(c_.get());
- dout(10) << __func__ << " " << c->get_cid() << " " << oid << dendl;
- if (!c->exists)
- return false;
-
- // Perform equivalent of c->get_object_(oid) != NULL. In C++11 the
- // shared_ptr needs to be compared to nullptr.
- return (bool)c->get_object(oid);
-}
-
-int MemStore::stat(
- const coll_t& cid,
- const ghobject_t& oid,
- struct stat *st,
- bool allow_eio)
-{
- CollectionHandle c = get_collection(cid);
- if (!c)
- return -ENOENT;
- return stat(c, oid, st, allow_eio);
-}
-
-int MemStore::stat(
- CollectionHandle &c_,
- const ghobject_t& oid,
- struct stat *st,
- bool allow_eio)
-{
- Collection *c = static_cast<Collection*>(c_.get());
- dout(10) << __func__ << " " << c->cid << " " << oid << dendl;
- if (!c->exists)
- return -ENOENT;
- ObjectRef o = c->get_object(oid);
- if (!o)
- return -ENOENT;
- st->st_size = o->get_size();
- st->st_blksize = 4096;
- st->st_blocks = (st->st_size + st->st_blksize - 1) / st->st_blksize;
- st->st_nlink = 1;
- return 0;
-}
-
-int MemStore::set_collection_opts(
- const coll_t& cid,
- const pool_opts_t& opts)
-{
- return -EOPNOTSUPP;
-}
-
-int MemStore::read(
- const coll_t& cid,
- const ghobject_t& oid,
- uint64_t offset,
- size_t len,
- bufferlist& bl,
- uint32_t op_flags)
-{
- CollectionHandle c = get_collection(cid);
- if (!c)
- return -ENOENT;
- return read(c, oid, offset, len, bl, op_flags);
-}
-
-int MemStore::read(
- CollectionHandle &c_,
- const ghobject_t& oid,
- uint64_t offset,
- size_t len,
- bufferlist& bl,
- uint32_t op_flags)
-{
- Collection *c = static_cast<Collection*>(c_.get());
- dout(10) << __func__ << " " << c->cid << " " << oid << " "
- << offset << "~" << len << dendl;
- if (!c->exists)
- return -ENOENT;
- ObjectRef o = c->get_object(oid);
- if (!o)
- return -ENOENT;
- if (offset >= o->get_size())
- return 0;
- size_t l = len;
- if (l == 0 && offset == 0) // note: len == 0 means read the entire object
- l = o->get_size();
- else if (offset + l > o->get_size())
- l = o->get_size() - offset;
- bl.clear();
- return o->read(offset, l, bl);
-}
-
-int MemStore::fiemap(const coll_t& cid, const ghobject_t& oid,
- uint64_t offset, size_t len, bufferlist& bl)
-{
- map<uint64_t, uint64_t> destmap;
- int r = fiemap(cid, oid, offset, len, destmap);
- if (r >= 0)
- ::encode(destmap, bl);
- return r;
-}
-
-int MemStore::fiemap(const coll_t& cid, const ghobject_t& oid,
- uint64_t offset, size_t len, map<uint64_t, uint64_t>& destmap)
-{
- dout(10) << __func__ << " " << cid << " " << oid << " " << offset << "~"
- << len << dendl;
- CollectionRef c = get_collection(cid);
- if (!c)
- return -ENOENT;
-
- ObjectRef o = c->get_object(oid);
- if (!o)
- return -ENOENT;
- size_t l = len;
- if (offset + l > o->get_size())
- l = o->get_size() - offset;
- if (offset >= o->get_size())
- goto out;
- destmap[offset] = l;
- out:
- return 0;
-}
-
-int MemStore::getattr(const coll_t& cid, const ghobject_t& oid,
- const char *name, bufferptr& value)
-{
- CollectionHandle c = get_collection(cid);
- if (!c)
- return -ENOENT;
- return getattr(c, oid, name, value);
-}
-
-int MemStore::getattr(CollectionHandle &c_, const ghobject_t& oid,
- const char *name, bufferptr& value)
-{
- Collection *c = static_cast<Collection*>(c_.get());
- dout(10) << __func__ << " " << c->cid << " " << oid << " " << name << dendl;
- if (!c->exists)
- return -ENOENT;
- ObjectRef o = c->get_object(oid);
- if (!o)
- return -ENOENT;
- string k(name);
- std::lock_guard<std::mutex> lock(o->xattr_mutex);
- if (!o->xattr.count(k)) {
- return -ENODATA;
- }
- value = o->xattr[k];
- return 0;
-}
-
-int MemStore::getattrs(const coll_t& cid, const ghobject_t& oid,
- map<string,bufferptr>& aset)
-{
- CollectionHandle c = get_collection(cid);
- if (!c)
- return -ENOENT;
- return getattrs(c, oid, aset);
-}
-
-int MemStore::getattrs(CollectionHandle &c_, const ghobject_t& oid,
- map<string,bufferptr>& aset)
-{
- Collection *c = static_cast<Collection*>(c_.get());
- dout(10) << __func__ << " " << c->cid << " " << oid << dendl;
- if (!c->exists)
- return -ENOENT;
-
- ObjectRef o = c->get_object(oid);
- if (!o)
- return -ENOENT;
- std::lock_guard<std::mutex> lock(o->xattr_mutex);
- aset = o->xattr;
- return 0;
-}
-
-int MemStore::list_collections(vector<coll_t>& ls)
-{
- dout(10) << __func__ << dendl;
- RWLock::RLocker l(coll_lock);
- for (ceph::unordered_map<coll_t,CollectionRef>::iterator p = coll_map.begin();
- p != coll_map.end();
- ++p) {
- ls.push_back(p->first);
- }
- return 0;
-}
-
-bool MemStore::collection_exists(const coll_t& cid)
-{
- dout(10) << __func__ << " " << cid << dendl;
- RWLock::RLocker l(coll_lock);
- return coll_map.count(cid);
-}
-
-int MemStore::collection_empty(const coll_t& cid, bool *empty)
-{
- dout(10) << __func__ << " " << cid << dendl;
- CollectionRef c = get_collection(cid);
- if (!c)
- return -ENOENT;
- RWLock::RLocker l(c->lock);
- *empty = c->object_map.empty();
- return 0;
-}
-
-int MemStore::collection_bits(const coll_t& cid)
-{
- dout(10) << __func__ << " " << cid << dendl;
- CollectionRef c = get_collection(cid);
- if (!c)
- return -ENOENT;
- RWLock::RLocker l(c->lock);
- return c->bits;
-}
-
-int MemStore::collection_list(const coll_t& cid,
- const ghobject_t& start,
- const ghobject_t& end,
- int max,
- vector<ghobject_t> *ls, ghobject_t *next)
-{
- CollectionRef c = get_collection(cid);
- if (!c)
- return -ENOENT;
- RWLock::RLocker l(c->lock);
-
- dout(10) << __func__ << " cid " << cid << " start " << start
- << " end " << end << dendl;
- map<ghobject_t,ObjectRef>::iterator p = c->object_map.lower_bound(start);
- while (p != c->object_map.end() &&
- ls->size() < (unsigned)max &&
- p->first < end) {
- ls->push_back(p->first);
- ++p;
- }
- if (next != NULL) {
- if (p == c->object_map.end())
- *next = ghobject_t::get_max();
- else
- *next = p->first;
- }
- dout(10) << __func__ << " cid " << cid << " got " << ls->size() << dendl;
- return 0;
-}
-
-int MemStore::omap_get(
- const coll_t& cid, ///< [in] Collection containing oid
- const ghobject_t &oid, ///< [in] Object containing omap
- bufferlist *header, ///< [out] omap header
- map<string, bufferlist> *out /// < [out] Key to value map
- )
-{
- dout(10) << __func__ << " " << cid << " " << oid << dendl;
- CollectionRef c = get_collection(cid);
- if (!c)
- return -ENOENT;
-
- ObjectRef o = c->get_object(oid);
- if (!o)
- return -ENOENT;
- std::lock_guard<std::mutex> lock(o->omap_mutex);
- *header = o->omap_header;
- *out = o->omap;
- return 0;
-}
-
-int MemStore::omap_get_header(
- const coll_t& cid, ///< [in] Collection containing oid
- const ghobject_t &oid, ///< [in] Object containing omap
- bufferlist *header, ///< [out] omap header
- bool allow_eio ///< [in] don't assert on eio
- )
-{
- dout(10) << __func__ << " " << cid << " " << oid << dendl;
- CollectionRef c = get_collection(cid);
- if (!c)
- return -ENOENT;
-
- ObjectRef o = c->get_object(oid);
- if (!o)
- return -ENOENT;
- std::lock_guard<std::mutex> lock(o->omap_mutex);
- *header = o->omap_header;
- return 0;
-}
-
-int MemStore::omap_get_keys(
- const coll_t& cid, ///< [in] Collection containing oid
- const ghobject_t &oid, ///< [in] Object containing omap
- set<string> *keys ///< [out] Keys defined on oid
- )
-{
- dout(10) << __func__ << " " << cid << " " << oid << dendl;
- CollectionRef c = get_collection(cid);
- if (!c)
- return -ENOENT;
-
- ObjectRef o = c->get_object(oid);
- if (!o)
- return -ENOENT;
- std::lock_guard<std::mutex> lock(o->omap_mutex);
- for (map<string,bufferlist>::iterator p = o->omap.begin();
- p != o->omap.end();
- ++p)
- keys->insert(p->first);
- return 0;
-}
-
-int MemStore::omap_get_values(
- const coll_t& cid, ///< [in] Collection containing oid
- const ghobject_t &oid, ///< [in] Object containing omap
- const set<string> &keys, ///< [in] Keys to get
- map<string, bufferlist> *out ///< [out] Returned keys and values
- )
-{
- dout(10) << __func__ << " " << cid << " " << oid << dendl;
- CollectionRef c = get_collection(cid);
- if (!c)
- return -ENOENT;
-
- ObjectRef o = c->get_object(oid);
- if (!o)
- return -ENOENT;
- std::lock_guard<std::mutex> lock(o->omap_mutex);
- for (set<string>::const_iterator p = keys.begin();
- p != keys.end();
- ++p) {
- map<string,bufferlist>::iterator q = o->omap.find(*p);
- if (q != o->omap.end())
- out->insert(*q);
- }
- return 0;
-}
-
-int MemStore::omap_check_keys(
- const coll_t& cid, ///< [in] Collection containing oid
- const ghobject_t &oid, ///< [in] Object containing omap
- const set<string> &keys, ///< [in] Keys to check
- set<string> *out ///< [out] Subset of keys defined on oid
- )
-{
- dout(10) << __func__ << " " << cid << " " << oid << dendl;
- CollectionRef c = get_collection(cid);
- if (!c)
- return -ENOENT;
-
- ObjectRef o = c->get_object(oid);
- if (!o)
- return -ENOENT;
- std::lock_guard<std::mutex> lock(o->omap_mutex);
- for (set<string>::const_iterator p = keys.begin();
- p != keys.end();
- ++p) {
- map<string,bufferlist>::iterator q = o->omap.find(*p);
- if (q != o->omap.end())
- out->insert(*p);
- }
- return 0;
-}
-
-class MemStore::OmapIteratorImpl : public ObjectMap::ObjectMapIteratorImpl {
- CollectionRef c;
- ObjectRef o;
- map<string,bufferlist>::iterator it;
-public:
- OmapIteratorImpl(CollectionRef c, ObjectRef o)
- : c(c), o(o), it(o->omap.begin()) {}
-
- int seek_to_first() override {
- std::lock_guard<std::mutex>(o->omap_mutex);
- it = o->omap.begin();
- return 0;
- }
- int upper_bound(const string &after) override {
- std::lock_guard<std::mutex>(o->omap_mutex);
- it = o->omap.upper_bound(after);
- return 0;
- }
- int lower_bound(const string &to) override {
- std::lock_guard<std::mutex>(o->omap_mutex);
- it = o->omap.lower_bound(to);
- return 0;
- }
- bool valid() override {
- std::lock_guard<std::mutex>(o->omap_mutex);
- return it != o->omap.end();
- }
- int next(bool validate=true) override {
- std::lock_guard<std::mutex>(o->omap_mutex);
- ++it;
- return 0;
- }
- string key() override {
- std::lock_guard<std::mutex>(o->omap_mutex);
- return it->first;
- }
- bufferlist value() override {
- std::lock_guard<std::mutex>(o->omap_mutex);
- return it->second;
- }
- int status() override {
- return 0;
- }
-};
-
-ObjectMap::ObjectMapIterator MemStore::get_omap_iterator(const coll_t& cid,
- const ghobject_t& oid)
-{
- dout(10) << __func__ << " " << cid << " " << oid << dendl;
- CollectionRef c = get_collection(cid);
- if (!c)
- return ObjectMap::ObjectMapIterator();
-
- ObjectRef o = c->get_object(oid);
- if (!o)
- return ObjectMap::ObjectMapIterator();
- return ObjectMap::ObjectMapIterator(new OmapIteratorImpl(c, o));
-}
-
-
-// ---------------
-// write operations
-
-int MemStore::queue_transactions(Sequencer *osr,
- vector<Transaction>& tls,
- TrackedOpRef op,
- ThreadPool::TPHandle *handle)
-{
- // because memstore operations are synchronous, we can implement the
- // Sequencer with a mutex. this guarantees ordering on a given sequencer,
- // while allowing operations on different sequencers to happen in parallel
- struct OpSequencer : public Sequencer_impl {
- OpSequencer(CephContext* cct) :
- Sequencer_impl(cct) {}
- std::mutex mutex;
- void flush() override {}
- bool flush_commit(Context*) override { return true; }
- };
-
- std::unique_lock<std::mutex> lock;
- if (osr) {
- if (!osr->p) {
- osr->p = new OpSequencer(cct);
- }
- auto seq = static_cast<OpSequencer*>(osr->p.get());
- lock = std::unique_lock<std::mutex>(seq->mutex);
- }
-
- for (vector<Transaction>::iterator p = tls.begin(); p != tls.end(); ++p) {
- // poke the TPHandle heartbeat just to exercise that code path
- if (handle)
- handle->reset_tp_timeout();
-
- _do_transaction(*p);
- }
-
- Context *on_apply = NULL, *on_apply_sync = NULL, *on_commit = NULL;
- ObjectStore::Transaction::collect_contexts(tls, &on_apply, &on_commit,
- &on_apply_sync);
- if (on_apply_sync)
- on_apply_sync->complete(0);
- if (on_apply)
- finisher.queue(on_apply);
- if (on_commit)
- finisher.queue(on_commit);
- return 0;
-}
-
-void MemStore::_do_transaction(Transaction& t)
-{
- Transaction::iterator i = t.begin();
- int pos = 0;
-
- while (i.have_op()) {
- Transaction::Op *op = i.decode_op();
- int r = 0;
-
- switch (op->op) {
- case Transaction::OP_NOP:
- break;
- case Transaction::OP_TOUCH:
- {
- coll_t cid = i.get_cid(op->cid);
- ghobject_t oid = i.get_oid(op->oid);
- r = _touch(cid, oid);
- }
- break;
-
- case Transaction::OP_WRITE:
- {
- coll_t cid = i.get_cid(op->cid);
- ghobject_t oid = i.get_oid(op->oid);
- uint64_t off = op->off;
- uint64_t len = op->len;
- uint32_t fadvise_flags = i.get_fadvise_flags();
- bufferlist bl;
- i.decode_bl(bl);
- r = _write(cid, oid, off, len, bl, fadvise_flags);
- }
- break;
-
- case Transaction::OP_ZERO:
- {
- coll_t cid = i.get_cid(op->cid);
- ghobject_t oid = i.get_oid(op->oid);
- uint64_t off = op->off;
- uint64_t len = op->len;
- r = _zero(cid, oid, off, len);
- }
- break;
-
- case Transaction::OP_TRIMCACHE:
- {
- // deprecated, no-op
- }
- break;
-
- case Transaction::OP_TRUNCATE:
- {
- coll_t cid = i.get_cid(op->cid);
- ghobject_t oid = i.get_oid(op->oid);
- uint64_t off = op->off;
- r = _truncate(cid, oid, off);
- }
- break;
-
- case Transaction::OP_REMOVE:
- {
- coll_t cid = i.get_cid(op->cid);
- ghobject_t oid = i.get_oid(op->oid);
- r = _remove(cid, oid);
- }
- break;
-
- case Transaction::OP_SETATTR:
- {
- coll_t cid = i.get_cid(op->cid);
- ghobject_t oid = i.get_oid(op->oid);
- string name = i.decode_string();
- bufferlist bl;
- i.decode_bl(bl);
- map<string, bufferptr> to_set;
- to_set[name] = bufferptr(bl.c_str(), bl.length());
- r = _setattrs(cid, oid, to_set);
- }
- break;
-
- case Transaction::OP_SETATTRS:
- {
- coll_t cid = i.get_cid(op->cid);
- ghobject_t oid = i.get_oid(op->oid);
- map<string, bufferptr> aset;
- i.decode_attrset(aset);
- r = _setattrs(cid, oid, aset);
- }
- break;
-
- case Transaction::OP_RMATTR:
- {
- coll_t cid = i.get_cid(op->cid);
- ghobject_t oid = i.get_oid(op->oid);
- string name = i.decode_string();
- r = _rmattr(cid, oid, name.c_str());
- }
- break;
-
- case Transaction::OP_RMATTRS:
- {
- coll_t cid = i.get_cid(op->cid);
- ghobject_t oid = i.get_oid(op->oid);
- r = _rmattrs(cid, oid);
- }
- break;
-
- case Transaction::OP_CLONE:
- {
- coll_t cid = i.get_cid(op->cid);
- ghobject_t oid = i.get_oid(op->oid);
- ghobject_t noid = i.get_oid(op->dest_oid);
- r = _clone(cid, oid, noid);
- }
- break;
-
- case Transaction::OP_CLONERANGE:
- {
- coll_t cid = i.get_cid(op->cid);
- ghobject_t oid = i.get_oid(op->oid);
- ghobject_t noid = i.get_oid(op->dest_oid);
- uint64_t off = op->off;
- uint64_t len = op->len;
- r = _clone_range(cid, oid, noid, off, len, off);
- }
- break;
-
- case Transaction::OP_CLONERANGE2:
- {
- coll_t cid = i.get_cid(op->cid);
- ghobject_t oid = i.get_oid(op->oid);
- ghobject_t noid = i.get_oid(op->dest_oid);
- uint64_t srcoff = op->off;
- uint64_t len = op->len;
- uint64_t dstoff = op->dest_off;
- r = _clone_range(cid, oid, noid, srcoff, len, dstoff);
- }
- break;
-
- case Transaction::OP_MKCOLL:
- {
- coll_t cid = i.get_cid(op->cid);
- r = _create_collection(cid, op->split_bits);
- }
- break;
-
- case Transaction::OP_COLL_HINT:
- {
- coll_t cid = i.get_cid(op->cid);
- uint32_t type = op->hint_type;
- bufferlist hint;
- i.decode_bl(hint);
- bufferlist::iterator hiter = hint.begin();
- if (type == Transaction::COLL_HINT_EXPECTED_NUM_OBJECTS) {
- uint32_t pg_num;
- uint64_t num_objs;
- ::decode(pg_num, hiter);
- ::decode(num_objs, hiter);
- r = _collection_hint_expected_num_objs(cid, pg_num, num_objs);
- } else {
- // Ignore the hint
- dout(10) << "Unrecognized collection hint type: " << type << dendl;
- }
- }
- break;
-
- case Transaction::OP_RMCOLL:
- {
- coll_t cid = i.get_cid(op->cid);
- r = _destroy_collection(cid);
- }
- break;
-
- case Transaction::OP_COLL_ADD:
- {
- coll_t ocid = i.get_cid(op->cid);
- coll_t ncid = i.get_cid(op->dest_cid);
- ghobject_t oid = i.get_oid(op->oid);
- r = _collection_add(ncid, ocid, oid);
- }
- break;
-
- case Transaction::OP_COLL_REMOVE:
- {
- coll_t cid = i.get_cid(op->cid);
- ghobject_t oid = i.get_oid(op->oid);
- r = _remove(cid, oid);
- }
- break;
-
- case Transaction::OP_COLL_MOVE:
- assert(0 == "deprecated");
- break;
-
- case Transaction::OP_COLL_MOVE_RENAME:
- {
- coll_t oldcid = i.get_cid(op->cid);
- ghobject_t oldoid = i.get_oid(op->oid);
- coll_t newcid = i.get_cid(op->dest_cid);
- ghobject_t newoid = i.get_oid(op->dest_oid);
- r = _collection_move_rename(oldcid, oldoid, newcid, newoid);
- if (r == -ENOENT)
- r = 0;
- }
- break;
-
- case Transaction::OP_TRY_RENAME:
- {
- coll_t cid = i.get_cid(op->cid);
- ghobject_t oldoid = i.get_oid(op->oid);
- ghobject_t newoid = i.get_oid(op->dest_oid);
- r = _collection_move_rename(cid, oldoid, cid, newoid);
- if (r == -ENOENT)
- r = 0;
- }
- break;
-
- case Transaction::OP_COLL_SETATTR:
- {
- assert(0 == "not implemented");
- }
- break;
-
- case Transaction::OP_COLL_RMATTR:
- {
- assert(0 == "not implemented");
- }
- break;
-
- case Transaction::OP_COLL_RENAME:
- {
- assert(0 == "not implemented");
- }
- break;
-
- case Transaction::OP_OMAP_CLEAR:
- {
- coll_t cid = i.get_cid(op->cid);
- ghobject_t oid = i.get_oid(op->oid);
- r = _omap_clear(cid, oid);
- }
- break;
- case Transaction::OP_OMAP_SETKEYS:
- {
- coll_t cid = i.get_cid(op->cid);
- ghobject_t oid = i.get_oid(op->oid);
- bufferlist aset_bl;
- i.decode_attrset_bl(&aset_bl);
- r = _omap_setkeys(cid, oid, aset_bl);
- }
- break;
- case Transaction::OP_OMAP_RMKEYS:
- {
- coll_t cid = i.get_cid(op->cid);
- ghobject_t oid = i.get_oid(op->oid);
- bufferlist keys_bl;
- i.decode_keyset_bl(&keys_bl);
- r = _omap_rmkeys(cid, oid, keys_bl);
- }
- break;
- case Transaction::OP_OMAP_RMKEYRANGE:
- {
- coll_t cid = i.get_cid(op->cid);
- ghobject_t oid = i.get_oid(op->oid);
- string first, last;
- first = i.decode_string();
- last = i.decode_string();
- r = _omap_rmkeyrange(cid, oid, first, last);
- }
- break;
- case Transaction::OP_OMAP_SETHEADER:
- {
- coll_t cid = i.get_cid(op->cid);
- ghobject_t oid = i.get_oid(op->oid);
- bufferlist bl;
- i.decode_bl(bl);
- r = _omap_setheader(cid, oid, bl);
- }
- break;
- case Transaction::OP_SPLIT_COLLECTION:
- assert(0 == "deprecated");
- break;
- case Transaction::OP_SPLIT_COLLECTION2:
- {
- coll_t cid = i.get_cid(op->cid);
- uint32_t bits = op->split_bits;
- uint32_t rem = op->split_rem;
- coll_t dest = i.get_cid(op->dest_cid);
- r = _split_collection(cid, bits, rem, dest);
- }
- break;
-
- case Transaction::OP_SETALLOCHINT:
- {
- r = 0;
- }
- break;
-
- default:
- derr << "bad op " << op->op << dendl;
- ceph_abort();
- }
-
- if (r < 0) {
- bool ok = false;
-
- if (r == -ENOENT && !(op->op == Transaction::OP_CLONERANGE ||
- op->op == Transaction::OP_CLONE ||
- op->op == Transaction::OP_CLONERANGE2 ||
- op->op == Transaction::OP_COLL_ADD))
- // -ENOENT is usually okay
- ok = true;
- if (r == -ENODATA)
- ok = true;
-
- if (!ok) {
- const char *msg = "unexpected error code";
-
- if (r == -ENOENT && (op->op == Transaction::OP_CLONERANGE ||
- op->op == Transaction::OP_CLONE ||
- op->op == Transaction::OP_CLONERANGE2))
- msg = "ENOENT on clone suggests osd bug";
-
- if (r == -ENOSPC)
- // For now, if we hit _any_ ENOSPC, crash, before we do any damage
- // by partially applying transactions.
- msg = "ENOSPC from MemStore, misconfigured cluster or insufficient memory";
-
- if (r == -ENOTEMPTY) {
- msg = "ENOTEMPTY suggests garbage data in osd data dir";
- dump_all();
- }
-
- derr << " error " << cpp_strerror(r) << " not handled on operation " << op->op
- << " (op " << pos << ", counting from 0)" << dendl;
- dout(0) << msg << dendl;
- dout(0) << " transaction dump:\n";
- JSONFormatter f(true);
- f.open_object_section("transaction");
- t.dump(&f);
- f.close_section();
- f.flush(*_dout);
- *_dout << dendl;
- assert(0 == "unexpected error");
- }
- }
-
- ++pos;
- }
-}
-
-int MemStore::_touch(const coll_t& cid, const ghobject_t& oid)
-{
- dout(10) << __func__ << " " << cid << " " << oid << dendl;
- CollectionRef c = get_collection(cid);
- if (!c)
- return -ENOENT;
-
- c->get_or_create_object(oid);
- return 0;
-}
-
-int MemStore::_write(const coll_t& cid, const ghobject_t& oid,
- uint64_t offset, size_t len, const bufferlist& bl,
- uint32_t fadvise_flags)
-{
- dout(10) << __func__ << " " << cid << " " << oid << " "
- << offset << "~" << len << dendl;
- assert(len == bl.length());
-
- CollectionRef c = get_collection(cid);
- if (!c)
- return -ENOENT;
-
- ObjectRef o = c->get_or_create_object(oid);
- if (len > 0) {
- const ssize_t old_size = o->get_size();
- o->write(offset, bl);
- used_bytes += (o->get_size() - old_size);
- }
-
- return 0;
-}
-
-int MemStore::_zero(const coll_t& cid, const ghobject_t& oid,
- uint64_t offset, size_t len)
-{
- dout(10) << __func__ << " " << cid << " " << oid << " " << offset << "~"
- << len << dendl;
- bufferlist bl;
- bl.append_zero(len);
- return _write(cid, oid, offset, len, bl);
-}
-
-int MemStore::_truncate(const coll_t& cid, const ghobject_t& oid, uint64_t size)
-{
- dout(10) << __func__ << " " << cid << " " << oid << " " << size << dendl;
- CollectionRef c = get_collection(cid);
- if (!c)
- return -ENOENT;
-
- ObjectRef o = c->get_object(oid);
- if (!o)
- return -ENOENT;
- const ssize_t old_size = o->get_size();
- int r = o->truncate(size);
- used_bytes += (o->get_size() - old_size);
- return r;
-}
-
-int MemStore::_remove(const coll_t& cid, const ghobject_t& oid)
-{
- dout(10) << __func__ << " " << cid << " " << oid << dendl;
- CollectionRef c = get_collection(cid);
- if (!c)
- return -ENOENT;
- RWLock::WLocker l(c->lock);
-
- auto i = c->object_hash.find(oid);
- if (i == c->object_hash.end())
- return -ENOENT;
- used_bytes -= i->second->get_size();
- c->object_hash.erase(i);
- c->object_map.erase(oid);
-
- return 0;
-}
-
-int MemStore::_setattrs(const coll_t& cid, const ghobject_t& oid,
- map<string,bufferptr>& aset)
-{
- dout(10) << __func__ << " " << cid << " " << oid << dendl;
- CollectionRef c = get_collection(cid);
- if (!c)
- return -ENOENT;
-
- ObjectRef o = c->get_object(oid);
- if (!o)
- return -ENOENT;
- std::lock_guard<std::mutex> lock(o->xattr_mutex);
- for (map<string,bufferptr>::const_iterator p = aset.begin(); p != aset.end(); ++p)
- o->xattr[p->first] = p->second;
- return 0;
-}
-
-int MemStore::_rmattr(const coll_t& cid, const ghobject_t& oid, const char *name)
-{
- dout(10) << __func__ << " " << cid << " " << oid << " " << name << dendl;
- CollectionRef c = get_collection(cid);
- if (!c)
- return -ENOENT;
-
- ObjectRef o = c->get_object(oid);
- if (!o)
- return -ENOENT;
- std::lock_guard<std::mutex> lock(o->xattr_mutex);
- auto i = o->xattr.find(name);
- if (i == o->xattr.end())
- return -ENODATA;
- o->xattr.erase(i);
- return 0;
-}
-
-int MemStore::_rmattrs(const coll_t& cid, const ghobject_t& oid)
-{
- dout(10) << __func__ << " " << cid << " " << oid << dendl;
- CollectionRef c = get_collection(cid);
- if (!c)
- return -ENOENT;
-
- ObjectRef o = c->get_object(oid);
- if (!o)
- return -ENOENT;
- std::lock_guard<std::mutex> lock(o->xattr_mutex);
- o->xattr.clear();
- return 0;
-}
-
-int MemStore::_clone(const coll_t& cid, const ghobject_t& oldoid,
- const ghobject_t& newoid)
-{
- dout(10) << __func__ << " " << cid << " " << oldoid
- << " -> " << newoid << dendl;
- CollectionRef c = get_collection(cid);
- if (!c)
- return -ENOENT;
-
- ObjectRef oo = c->get_object(oldoid);
- if (!oo)
- return -ENOENT;
- ObjectRef no = c->get_or_create_object(newoid);
- used_bytes += oo->get_size() - no->get_size();
- no->clone(oo.get(), 0, oo->get_size(), 0);
-
- // take xattr and omap locks with std::lock()
- std::unique_lock<std::mutex>
- ox_lock(oo->xattr_mutex, std::defer_lock),
- nx_lock(no->xattr_mutex, std::defer_lock),
- oo_lock(oo->omap_mutex, std::defer_lock),
- no_lock(no->omap_mutex, std::defer_lock);
- std::lock(ox_lock, nx_lock, oo_lock, no_lock);
-
- no->omap_header = oo->omap_header;
- no->omap = oo->omap;
- no->xattr = oo->xattr;
- return 0;
-}
-
-int MemStore::_clone_range(const coll_t& cid, const ghobject_t& oldoid,
- const ghobject_t& newoid,
- uint64_t srcoff, uint64_t len, uint64_t dstoff)
-{
- dout(10) << __func__ << " " << cid << " "
- << oldoid << " " << srcoff << "~" << len << " -> "
- << newoid << " " << dstoff << "~" << len
- << dendl;
- CollectionRef c = get_collection(cid);
- if (!c)
- return -ENOENT;
-
- ObjectRef oo = c->get_object(oldoid);
- if (!oo)
- return -ENOENT;
- ObjectRef no = c->get_or_create_object(newoid);
- if (srcoff >= oo->get_size())
- return 0;
- if (srcoff + len >= oo->get_size())
- len = oo->get_size() - srcoff;
-
- const ssize_t old_size = no->get_size();
- no->clone(oo.get(), srcoff, len, dstoff);
- used_bytes += (no->get_size() - old_size);
-
- return len;
-}
-
-int MemStore::_omap_clear(const coll_t& cid, const ghobject_t &oid)
-{
- dout(10) << __func__ << " " << cid << " " << oid << dendl;
- CollectionRef c = get_collection(cid);
- if (!c)
- return -ENOENT;
-
- ObjectRef o = c->get_object(oid);
- if (!o)
- return -ENOENT;
- std::lock_guard<std::mutex> lock(o->omap_mutex);
- o->omap.clear();
- o->omap_header.clear();
- return 0;
-}
-
-int MemStore::_omap_setkeys(const coll_t& cid, const ghobject_t &oid,
- bufferlist& aset_bl)
-{
- dout(10) << __func__ << " " << cid << " " << oid << dendl;
- CollectionRef c = get_collection(cid);
- if (!c)
- return -ENOENT;
-
- ObjectRef o = c->get_object(oid);
- if (!o)
- return -ENOENT;
- std::lock_guard<std::mutex> lock(o->omap_mutex);
- bufferlist::iterator p = aset_bl.begin();
- __u32 num;
- ::decode(num, p);
- while (num--) {
- string key;
- ::decode(key, p);
- ::decode(o->omap[key], p);
- }
- return 0;
-}
-
-int MemStore::_omap_rmkeys(const coll_t& cid, const ghobject_t &oid,
- bufferlist& keys_bl)
-{
- dout(10) << __func__ << " " << cid << " " << oid << dendl;
- CollectionRef c = get_collection(cid);
- if (!c)
- return -ENOENT;
-
- ObjectRef o = c->get_object(oid);
- if (!o)
- return -ENOENT;
- std::lock_guard<std::mutex> lock(o->omap_mutex);
- bufferlist::iterator p = keys_bl.begin();
- __u32 num;
- ::decode(num, p);
- while (num--) {
- string key;
- ::decode(key, p);
- o->omap.erase(key);
- }
- return 0;
-}
-
-int MemStore::_omap_rmkeyrange(const coll_t& cid, const ghobject_t &oid,
- const string& first, const string& last)
-{
- dout(10) << __func__ << " " << cid << " " << oid << " " << first
- << " " << last << dendl;
- CollectionRef c = get_collection(cid);
- if (!c)
- return -ENOENT;
-
- ObjectRef o = c->get_object(oid);
- if (!o)
- return -ENOENT;
- std::lock_guard<std::mutex> lock(o->omap_mutex);
- map<string,bufferlist>::iterator p = o->omap.lower_bound(first);
- map<string,bufferlist>::iterator e = o->omap.lower_bound(last);
- o->omap.erase(p, e);
- return 0;
-}
-
-int MemStore::_omap_setheader(const coll_t& cid, const ghobject_t &oid,
- const bufferlist &bl)
-{
- dout(10) << __func__ << " " << cid << " " << oid << dendl;
- CollectionRef c = get_collection(cid);
- if (!c)
- return -ENOENT;
-
- ObjectRef o = c->get_object(oid);
- if (!o)
- return -ENOENT;
- std::lock_guard<std::mutex> lock(o->omap_mutex);
- o->omap_header = bl;
- return 0;
-}
-
-int MemStore::_create_collection(const coll_t& cid, int bits)
-{
- dout(10) << __func__ << " " << cid << dendl;
- RWLock::WLocker l(coll_lock);
- auto result = coll_map.insert(std::make_pair(cid, CollectionRef()));
- if (!result.second)
- return -EEXIST;
- result.first->second.reset(new Collection(cct, cid));
- result.first->second->bits = bits;
- return 0;
-}
-
-int MemStore::_destroy_collection(const coll_t& cid)
-{
- dout(10) << __func__ << " " << cid << dendl;
- RWLock::WLocker l(coll_lock);
- ceph::unordered_map<coll_t,CollectionRef>::iterator cp = coll_map.find(cid);
- if (cp == coll_map.end())
- return -ENOENT;
- {
- RWLock::RLocker l2(cp->second->lock);
- if (!cp->second->object_map.empty())
- return -ENOTEMPTY;
- cp->second->exists = false;
- }
- used_bytes -= cp->second->used_bytes();
- coll_map.erase(cp);
- return 0;
-}
-
-int MemStore::_collection_add(const coll_t& cid, const coll_t& ocid, const ghobject_t& oid)
-{
- dout(10) << __func__ << " " << cid << " " << ocid << " " << oid << dendl;
- CollectionRef c = get_collection(cid);
- if (!c)
- return -ENOENT;
- CollectionRef oc = get_collection(ocid);
- if (!oc)
- return -ENOENT;
- RWLock::WLocker l1(MIN(&(*c), &(*oc))->lock);
- RWLock::WLocker l2(MAX(&(*c), &(*oc))->lock);
-
- if (c->object_hash.count(oid))
- return -EEXIST;
- if (oc->object_hash.count(oid) == 0)
- return -ENOENT;
- ObjectRef o = oc->object_hash[oid];
- c->object_map[oid] = o;
- c->object_hash[oid] = o;
- return 0;
-}
-
-int MemStore::_collection_move_rename(const coll_t& oldcid, const ghobject_t& oldoid,
- coll_t cid, const ghobject_t& oid)
-{
- dout(10) << __func__ << " " << oldcid << " " << oldoid << " -> "
- << cid << " " << oid << dendl;
- CollectionRef c = get_collection(cid);
- if (!c)
- return -ENOENT;
- CollectionRef oc = get_collection(oldcid);
- if (!oc)
- return -ENOENT;
-
- // note: c and oc may be the same
- assert(&(*c) == &(*oc));
- c->lock.get_write();
-
- int r = -EEXIST;
- if (c->object_hash.count(oid))
- goto out;
- r = -ENOENT;
- if (oc->object_hash.count(oldoid) == 0)
- goto out;
- {
- ObjectRef o = oc->object_hash[oldoid];
- c->object_map[oid] = o;
- c->object_hash[oid] = o;
- oc->object_map.erase(oldoid);
- oc->object_hash.erase(oldoid);
- }
- r = 0;
- out:
- c->lock.put_write();
- return r;
-}
-
-int MemStore::_split_collection(const coll_t& cid, uint32_t bits, uint32_t match,
- coll_t dest)
-{
- dout(10) << __func__ << " " << cid << " " << bits << " " << match << " "
- << dest << dendl;
- CollectionRef sc = get_collection(cid);
- if (!sc)
- return -ENOENT;
- CollectionRef dc = get_collection(dest);
- if (!dc)
- return -ENOENT;
- RWLock::WLocker l1(MIN(&(*sc), &(*dc))->lock);
- RWLock::WLocker l2(MAX(&(*sc), &(*dc))->lock);
-
- map<ghobject_t,ObjectRef>::iterator p = sc->object_map.begin();
- while (p != sc->object_map.end()) {
- if (p->first.match(bits, match)) {
- dout(20) << " moving " << p->first << dendl;
- dc->object_map.insert(make_pair(p->first, p->second));
- dc->object_hash.insert(make_pair(p->first, p->second));
- sc->object_hash.erase(p->first);
- sc->object_map.erase(p++);
- } else {
- ++p;
- }
- }
-
- sc->bits = bits;
- assert(dc->bits == (int)bits);
-
- return 0;
-}
-namespace {
-struct BufferlistObject : public MemStore::Object {
- Spinlock mutex;
- bufferlist data;
-
- size_t get_size() const override { return data.length(); }
-
- int read(uint64_t offset, uint64_t len, bufferlist &bl) override;
- int write(uint64_t offset, const bufferlist &bl) override;
- int clone(Object *src, uint64_t srcoff, uint64_t len,
- uint64_t dstoff) override;
- int truncate(uint64_t offset) override;
-
- void encode(bufferlist& bl) const override {
- ENCODE_START(1, 1, bl);
- ::encode(data, bl);
- encode_base(bl);
- ENCODE_FINISH(bl);
- }
- void decode(bufferlist::iterator& p) override {
- DECODE_START(1, p);
- ::decode(data, p);
- decode_base(p);
- DECODE_FINISH(p);
- }
-};
-}
-// BufferlistObject
-int BufferlistObject::read(uint64_t offset, uint64_t len,
- bufferlist &bl)
-{
- std::lock_guard<Spinlock> lock(mutex);
- bl.substr_of(data, offset, len);
- return bl.length();
-}
-
-int BufferlistObject::write(uint64_t offset, const bufferlist &src)
-{
- unsigned len = src.length();
-
- std::lock_guard<Spinlock> lock(mutex);
-
- // before
- bufferlist newdata;
- if (get_size() >= offset) {
- newdata.substr_of(data, 0, offset);
- } else {
- if (get_size()) {
- newdata.substr_of(data, 0, get_size());
- }
- newdata.append_zero(offset - get_size());
- }
-
- newdata.append(src);
-
- // after
- if (get_size() > offset + len) {
- bufferlist tail;
- tail.substr_of(data, offset + len, get_size() - (offset + len));
- newdata.append(tail);
- }
-
- data.claim(newdata);
- return 0;
-}
-
-int BufferlistObject::clone(Object *src, uint64_t srcoff,
- uint64_t len, uint64_t dstoff)
-{
- auto srcbl = dynamic_cast<BufferlistObject*>(src);
- if (srcbl == nullptr)
- return -ENOTSUP;
-
- bufferlist bl;
- {
- std::lock_guard<Spinlock> lock(srcbl->mutex);
- if (srcoff == dstoff && len == src->get_size()) {
- data = srcbl->data;
- return 0;
- }
- bl.substr_of(srcbl->data, srcoff, len);
- }
- return write(dstoff, bl);
-}
-
-int BufferlistObject::truncate(uint64_t size)
-{
- std::lock_guard<Spinlock> lock(mutex);
- if (get_size() > size) {
- bufferlist bl;
- bl.substr_of(data, 0, size);
- data.claim(bl);
- } else if (get_size() == size) {
- // do nothing
- } else {
- data.append_zero(size - get_size());
- }
- return 0;
-}
-
-// PageSetObject
-
-struct MemStore::PageSetObject : public Object {
- PageSet data;
- uint64_t data_len;
-#if defined(__GLIBCXX__)
- // use a thread-local vector for the pages returned by PageSet, so we
- // can avoid allocations in read/write()
- static thread_local PageSet::page_vector tls_pages;
-#endif
-
- explicit PageSetObject(size_t page_size) : data(page_size), data_len(0) {}
-
- size_t get_size() const override { return data_len; }
-
- int read(uint64_t offset, uint64_t len, bufferlist &bl) override;
- int write(uint64_t offset, const bufferlist &bl) override;
- int clone(Object *src, uint64_t srcoff, uint64_t len,
- uint64_t dstoff) override;
- int truncate(uint64_t offset) override;
-
- void encode(bufferlist& bl) const override {
- ENCODE_START(1, 1, bl);
- ::encode(data_len, bl);
- data.encode(bl);
- encode_base(bl);
- ENCODE_FINISH(bl);
- }
- void decode(bufferlist::iterator& p) override {
- DECODE_START(1, p);
- ::decode(data_len, p);
- data.decode(p);
- decode_base(p);
- DECODE_FINISH(p);
- }
-};
-
-#if defined(__GLIBCXX__)
-// use a thread-local vector for the pages returned by PageSet, so we
-// can avoid allocations in read/write()
-thread_local PageSet::page_vector MemStore::PageSetObject::tls_pages;
-#define DEFINE_PAGE_VECTOR(name)
-#else
-#define DEFINE_PAGE_VECTOR(name) PageSet::page_vector name;
-#endif
-
-int MemStore::PageSetObject::read(uint64_t offset, uint64_t len, bufferlist& bl)
-{
- const auto start = offset;
- const auto end = offset + len;
- auto remaining = len;
-
- DEFINE_PAGE_VECTOR(tls_pages);
- data.get_range(offset, len, tls_pages);
-
- // allocate a buffer for the data
- buffer::ptr buf(len);
-
- auto p = tls_pages.begin();
- while (remaining) {
- // no more pages in range
- if (p == tls_pages.end() || (*p)->offset >= end) {
- buf.zero(offset - start, remaining);
- break;
- }
- auto page = *p;
-
- // fill any holes between pages with zeroes
- if (page->offset > offset) {
- const auto count = std::min(remaining, page->offset - offset);
- buf.zero(offset - start, count);
- remaining -= count;
- offset = page->offset;
- if (!remaining)
- break;
- }
-
- // read from page
- const auto page_offset = offset - page->offset;
- const auto count = min(remaining, data.get_page_size() - page_offset);
-
- buf.copy_in(offset - start, count, page->data + page_offset);
-
- remaining -= count;
- offset += count;
-
- ++p;
- }
-
- tls_pages.clear(); // drop page refs
-
- bl.append(std::move(buf));
- return len;
-}
-
-int MemStore::PageSetObject::write(uint64_t offset, const bufferlist &src)
-{
- unsigned len = src.length();
-
- DEFINE_PAGE_VECTOR(tls_pages);
- // make sure the page range is allocated
- data.alloc_range(offset, src.length(), tls_pages);
-
- auto page = tls_pages.begin();
-
- auto p = src.begin();
- while (len > 0) {
- unsigned page_offset = offset - (*page)->offset;
- unsigned pageoff = data.get_page_size() - page_offset;
- unsigned count = min(len, pageoff);
- p.copy(count, (*page)->data + page_offset);
- offset += count;
- len -= count;
- if (count == pageoff)
- ++page;
- }
- if (data_len < offset)
- data_len = offset;
- tls_pages.clear(); // drop page refs
- return 0;
-}
-
-int MemStore::PageSetObject::clone(Object *src, uint64_t srcoff,
- uint64_t len, uint64_t dstoff)
-{
- const int64_t delta = dstoff - srcoff;
-
- auto &src_data = static_cast<PageSetObject*>(src)->data;
- const uint64_t src_page_size = src_data.get_page_size();
-
- auto &dst_data = data;
- const auto dst_page_size = dst_data.get_page_size();
-
- DEFINE_PAGE_VECTOR(tls_pages);
- PageSet::page_vector dst_pages;
-
- while (len) {
- // limit to 16 pages at a time so tls_pages doesn't balloon in size
- auto count = std::min(len, (uint64_t)src_page_size * 16);
- src_data.get_range(srcoff, count, tls_pages);
-
- // allocate the destination range
- // TODO: avoid allocating pages for holes in the source range
- dst_data.alloc_range(srcoff + delta, count, dst_pages);
- auto dst_iter = dst_pages.begin();
-
- for (auto &src_page : tls_pages) {
- auto sbegin = std::max(srcoff, src_page->offset);
- auto send = std::min(srcoff + count, src_page->offset + src_page_size);
-
- // zero-fill holes before src_page
- if (srcoff < sbegin) {
- while (dst_iter != dst_pages.end()) {
- auto &dst_page = *dst_iter;
- auto dbegin = std::max(srcoff + delta, dst_page->offset);
- auto dend = std::min(sbegin + delta, dst_page->offset + dst_page_size);
- std::fill(dst_page->data + dbegin - dst_page->offset,
- dst_page->data + dend - dst_page->offset, 0);
- if (dend < dst_page->offset + dst_page_size)
- break;
- ++dst_iter;
- }
- const auto c = sbegin - srcoff;
- count -= c;
- len -= c;
- }
-
- // copy data from src page to dst pages
- while (dst_iter != dst_pages.end()) {
- auto &dst_page = *dst_iter;
- auto dbegin = std::max(sbegin + delta, dst_page->offset);
- auto dend = std::min(send + delta, dst_page->offset + dst_page_size);
-
- std::copy(src_page->data + (dbegin - delta) - src_page->offset,
- src_page->data + (dend - delta) - src_page->offset,
- dst_page->data + dbegin - dst_page->offset);
- if (dend < dst_page->offset + dst_page_size)
- break;
- ++dst_iter;
- }
-
- const auto c = send - sbegin;
- count -= c;
- len -= c;
- srcoff = send;
- dstoff = send + delta;
- }
- tls_pages.clear(); // drop page refs
-
- // zero-fill holes after the last src_page
- if (count > 0) {
- while (dst_iter != dst_pages.end()) {
- auto &dst_page = *dst_iter;
- auto dbegin = std::max(dstoff, dst_page->offset);
- auto dend = std::min(dstoff + count, dst_page->offset + dst_page_size);
- std::fill(dst_page->data + dbegin - dst_page->offset,
- dst_page->data + dend - dst_page->offset, 0);
- ++dst_iter;
- }
- srcoff += count;
- dstoff += count;
- len -= count;
- }
- dst_pages.clear(); // drop page refs
- }
-
- // update object size
- if (data_len < dstoff)
- data_len = dstoff;
- return 0;
-}
-
-int MemStore::PageSetObject::truncate(uint64_t size)
-{
- data.free_pages_after(size);
- data_len = size;
-
- const auto page_size = data.get_page_size();
- const auto page_offset = size & ~(page_size-1);
- if (page_offset == size)
- return 0;
-
- DEFINE_PAGE_VECTOR(tls_pages);
- // write zeroes to the rest of the last page
- data.get_range(page_offset, page_size, tls_pages);
- if (tls_pages.empty())
- return 0;
-
- auto page = tls_pages.begin();
- auto data = (*page)->data;
- std::fill(data + (size - page_offset), data + page_size, 0);
- tls_pages.clear(); // drop page ref
- return 0;
-}
-
-
-MemStore::ObjectRef MemStore::Collection::create_object() const {
- if (use_page_set)
- return new PageSetObject(cct->_conf->memstore_page_size);
- return new BufferlistObject();
-}
Code Review / stor4nfv.git / blobdiff