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// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
// vim: ts=8 sw=2 smarttab
#include "crimson/common/tmap_helpers.h"
#include "include/buffer.h"
#include "include/encoding.h"
#include "include/rados.h"
namespace detail {
#define decode_or_return(v, bp) \
try { \
::decode(v, bp); \
} catch (...) { \
return -EINVAL; \
}
class TMapContents {
std::map<std::string, bufferlist> keys;
bufferlist header;
public:
TMapContents() = default;
int decode(bufferlist::const_iterator &bliter) {
keys.clear();
header.clear();
if (bliter.end()) {
return 0;
}
decode_or_return(header, bliter);
__u32 num_keys;
decode_or_return(num_keys, bliter);
for (; num_keys > 0; --num_keys) {
std::string key;
decode_or_return(key, bliter);
decode_or_return(keys[key], bliter);
}
return 0;
}
bufferlist encode() {
bufferlist bl;
::encode(header, bl);
::encode(static_cast<__u32>(keys.size()), bl);
for (auto &[k, v]: keys) {
::encode(k, bl);
::encode(v, bl);
}
return bl;
}
int update(bufferlist::const_iterator in) {
while (!in.end()) {
__u8 op;
decode_or_return(op, in);
if (op == CEPH_OSD_TMAP_HDR) {
decode_or_return(header, in);
continue;
}
std::string key;
decode_or_return(key, in);
switch (op) {
case CEPH_OSD_TMAP_SET: {
decode_or_return(keys[key], in);
break;
}
case CEPH_OSD_TMAP_CREATE: {
if (keys.contains(key)) {
return -EEXIST;
}
decode_or_return(keys[key], in);
break;
}
case CEPH_OSD_TMAP_RM: {
auto kiter = keys.find(key);
if (kiter == keys.end()) {
return -ENOENT;
}
keys.erase(kiter);
break;
}
case CEPH_OSD_TMAP_RMSLOPPY: {
keys.erase(key);
break;
}
}
}
return 0;
}
int put(bufferlist::const_iterator in) {
return 0;
}
};
}
namespace crimson::common {
using do_tmap_up_ret = tl::expected<bufferlist, int>;
do_tmap_up_ret do_tmap_up(bufferlist::const_iterator in, bufferlist contents)
{
detail::TMapContents tmap;
auto bliter = contents.cbegin();
int r = tmap.decode(bliter);
if (r < 0) {
return tl::unexpected(r);
}
r = tmap.update(in);
if (r < 0) {
return tl::unexpected(r);
}
return tmap.encode();
}
using do_tmap_up_ret = tl::expected<bufferlist, int>;
do_tmap_up_ret do_tmap_put(bufferlist::const_iterator in)
{
detail::TMapContents tmap;
int r = tmap.decode(in);
if (r < 0) {
return tl::unexpected(r);
}
return tmap.encode();
}
}
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