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// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
// vim: ts=8 sw=2 smarttab ft=cpp
#include <optional>
#include "rgw_data_access.h"
#include "rgw_acl_s3.h"
#include "rgw_aio_throttle.h"
#include "rgw_compression.h"
#include "rgw_cksum.h"
#include "common/BackTrace.h"
#define dout_subsys ceph_subsys_rgw
template<class H, size_t S>
class RGWEtag
{
H hash;
public:
RGWEtag() {
if constexpr (std::is_same_v<H, MD5>) {
// Allow use of MD5 digest in FIPS mode for non-cryptographic purposes
hash.SetFlags(EVP_MD_CTX_FLAG_NON_FIPS_ALLOW);
}
}
void update(const char *buf, size_t len) {
hash.Update((const unsigned char *)buf, len);
}
void update(bufferlist& bl) {
if (bl.length() > 0) {
update(bl.c_str(), bl.length());
}
}
void update(const std::string& s) {
if (!s.empty()) {
update(s.c_str(), s.size());
}
}
void finish(std::string *etag) {
char etag_buf[S];
char etag_buf_str[S * 2 + 16];
hash.Final((unsigned char *)etag_buf);
buf_to_hex((const unsigned char *)etag_buf, S,
etag_buf_str);
*etag = etag_buf_str;
}
};
using RGWMD5Etag = RGWEtag<MD5, CEPH_CRYPTO_MD5_DIGESTSIZE>;
RGWDataAccess::RGWDataAccess(rgw::sal::Driver* _driver) : driver(_driver)
{
}
int RGWDataAccess::Bucket::finish_init()
{
auto iter = attrs.find(RGW_ATTR_ACL);
if (iter == attrs.end()) {
return 0;
}
bufferlist::const_iterator bliter = iter->second.begin();
try {
policy.decode(bliter);
} catch (buffer::error& err) {
return -EIO;
}
return 0;
}
int RGWDataAccess::Bucket::init(const DoutPrefixProvider *dpp, optional_yield y)
{
std::unique_ptr<rgw::sal::Bucket> bucket;
int ret = sd->driver->load_bucket(dpp, rgw_bucket(tenant, name), &bucket, y);
if (ret < 0) {
return ret;
}
bucket_info = bucket->get_info();
mtime = bucket->get_modification_time();
attrs = bucket->get_attrs();
return finish_init();
}
int RGWDataAccess::Bucket::init(const RGWBucketInfo& _bucket_info,
const std::map<std::string, bufferlist>& _attrs)
{
bucket_info = _bucket_info;
attrs = _attrs;
return finish_init();
}
int RGWDataAccess::Bucket::get_object(const rgw_obj_key& key,
ObjectRef *obj) {
obj->reset(new Object(sd, shared_from_this(), key));
return 0;
}
int RGWDataAccess::Object::put(bufferlist& data,
std::map<std::string, bufferlist>& attrs,
const DoutPrefixProvider *dpp,
optional_yield y)
{
rgw::sal::Driver* driver = sd->driver;
CephContext *cct = driver->ctx();
std::string tag;
append_rand_alpha(cct, tag, tag, 32);
RGWBucketInfo& bucket_info = bucket->bucket_info;
rgw::BlockingAioThrottle aio(driver->ctx()->_conf->rgw_put_obj_min_window_size);
std::unique_ptr<rgw::sal::Bucket> b = driver->get_bucket(bucket_info);
std::unique_ptr<rgw::sal::Object> obj = b->get_object(key);
auto& owner = bucket->policy.get_owner();
std::string req_id = driver->zone_unique_id(driver->get_new_req_id());
std::unique_ptr<rgw::sal::Writer> processor;
processor = driver->get_atomic_writer(dpp, y, obj.get(), owner,
nullptr, olh_epoch, req_id);
int ret = processor->prepare(y);
if (ret < 0)
return ret;
rgw::sal::DataProcessor *filter = processor.get();
CompressorRef plugin;
boost::optional<RGWPutObj_Compress> compressor;
const auto& compression_type = driver->get_compression_type(bucket_info.placement_rule);
if (compression_type != "none") {
plugin = Compressor::create(driver->ctx(), compression_type);
if (!plugin) {
ldpp_dout(dpp, 1) << "Cannot load plugin for compression type "
<< compression_type << dendl;
} else {
compressor.emplace(driver->ctx(), plugin, filter);
filter = &*compressor;
}
}
off_t ofs = 0;
auto obj_size = data.length();
RGWMD5Etag etag_calc;
do {
size_t read_len = std::min(data.length(), (unsigned int)cct->_conf->rgw_max_chunk_size);
bufferlist bl;
data.splice(0, read_len, &bl);
etag_calc.update(bl);
ret = filter->process(std::move(bl), ofs);
if (ret < 0)
return ret;
ofs += read_len;
} while (data.length() > 0);
ret = filter->process({}, ofs);
if (ret < 0) {
return ret;
}
bool has_etag_attr = false;
auto iter = attrs.find(RGW_ATTR_ETAG);
if (iter != attrs.end()) {
bufferlist& bl = iter->second;
etag = bl.to_str();
has_etag_attr = true;
}
if (!aclbl) {
RGWAccessControlPolicy policy;
const auto& owner = bucket->policy.get_owner();
policy.create_default(owner.id, owner.display_name); // default private policy
policy.encode(aclbl.emplace());
}
if (etag.empty()) {
etag_calc.finish(&etag);
}
if (!has_etag_attr) {
bufferlist etagbl;
etagbl.append(etag);
attrs[RGW_ATTR_ETAG] = etagbl;
}
attrs[RGW_ATTR_ACL] = *aclbl;
std::string *puser_data = nullptr;
if (user_data) {
puser_data = &(*user_data);
}
const req_context rctx{dpp, y, nullptr};
return processor->complete(obj_size, etag,
&mtime, mtime, attrs,
rgw::cksum::no_cksum,
delete_at,
nullptr, nullptr,
puser_data,
nullptr, nullptr,
rctx, rgw::sal::FLAG_LOG_OP);
}
void RGWDataAccess::Object::set_policy(const RGWAccessControlPolicy& policy)
{
policy.encode(aclbl.emplace());
}
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