Adding upstream version 18.2.2.upstream/18.2.2

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 782 insertions, 0 deletions

diff --git a/src/osd/objclass.cc b/src/osd/objclass.cc
new file mode 100644
index 000000000..af6d76efa
--- /dev/null
+++ b/src/osd/objclass.cc
@@ -0,0 +1,782 @@
+// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
+// vim: ts=8 sw=2 smarttab
+
+#include <cstdarg>
+#include <boost/container/small_vector.hpp>
+#include "common/ceph_context.h"
+#include "common/ceph_releases.h"
+#include "common/config.h"
+#include "common/debug.h"
+
+#include "objclass/objclass.h"
+#include "osd/PrimaryLogPG.h"
+
+#include "osd/ClassHandler.h"
+
+#include "auth/Crypto.h"
+#include "common/armor.h"
+
+#define dout_context ClassHandler::get_instance().cct
+
+using std::map;
+using std::set;
+using std::string;
+using std::vector;
+
+using ceph::bufferlist;
+using ceph::decode;
+using ceph::encode;
+using ceph::real_time;
+
+static constexpr int dout_subsys = ceph_subsys_objclass;
+
+
+int cls_call(cls_method_context_t hctx, const char *cls, const char *method,
+	     char *indata, int datalen, char **outdata, int *outdatalen)
+{
+  PrimaryLogPG::OpContext **pctx = (PrimaryLogPG::OpContext **)hctx;
+  bufferlist idata;
+  vector<OSDOp> nops(1);
+  OSDOp& op = nops[0];
+  int r;
+
+  op.op.op = CEPH_OSD_OP_CALL;
+  op.op.cls.class_len = strlen(cls);
+  op.op.cls.method_len = strlen(method);
+  op.op.cls.indata_len = datalen;
+  op.indata.append(cls, op.op.cls.class_len);
+  op.indata.append(method, op.op.cls.method_len);
+  op.indata.append(indata, datalen);
+  r = (*pctx)->pg->do_osd_ops(*pctx, nops);
+  if (r < 0)
+    return r;
+
+  *outdata = (char *)malloc(op.outdata.length());
+  if (!*outdata)
+    return -ENOMEM;
+  memcpy(*outdata, op.outdata.c_str(), op.outdata.length());
+  *outdatalen = op.outdata.length();
+
+  return r;
+}
+
+int cls_getxattr(cls_method_context_t hctx, const char *name,
+		 char **outdata, int *outdatalen)
+{
+  PrimaryLogPG::OpContext **pctx = (PrimaryLogPG::OpContext **)hctx;
+  vector<OSDOp> nops(1);
+  OSDOp& op = nops[0];
+  int r;
+
+  op.op.op = CEPH_OSD_OP_GETXATTR;
+  op.op.xattr.name_len = strlen(name);
+  op.indata.append(name, op.op.xattr.name_len);
+  r = (*pctx)->pg->do_osd_ops(*pctx, nops);
+  if (r < 0)
+    return r;
+
+  *outdata = (char *)malloc(op.outdata.length());
+  if (!*outdata)
+    return -ENOMEM;
+  memcpy(*outdata, op.outdata.c_str(), op.outdata.length());
+  *outdatalen = op.outdata.length();
+
+  return r;
+}
+
+int cls_setxattr(cls_method_context_t hctx, const char *name,
+		 const char *value, int val_len)
+{
+  PrimaryLogPG::OpContext **pctx = (PrimaryLogPG::OpContext **)hctx;
+  vector<OSDOp> nops(1);
+  OSDOp& op = nops[0];
+  int r;
+
+  op.op.op = CEPH_OSD_OP_SETXATTR;
+  op.op.xattr.name_len = strlen(name);
+  op.op.xattr.value_len = val_len;
+  op.indata.append(name, op.op.xattr.name_len);
+  op.indata.append(value, val_len);
+  r = (*pctx)->pg->do_osd_ops(*pctx, nops);
+
+  return r;
+}
+
+int cls_read(cls_method_context_t hctx, int ofs, int len,
+	     char **outdata, int *outdatalen)
+{
+  PrimaryLogPG::OpContext **pctx = (PrimaryLogPG::OpContext **)hctx;
+  vector<OSDOp> ops(1);
+  ops[0].op.op = CEPH_OSD_OP_SYNC_READ;
+  ops[0].op.extent.offset = ofs;
+  ops[0].op.extent.length = len;
+  int r = (*pctx)->pg->do_osd_ops(*pctx, ops);
+  if (r < 0)
+    return r;
+
+  *outdata = (char *)malloc(ops[0].outdata.length());
+  if (!*outdata)
+    return -ENOMEM;
+  memcpy(*outdata, ops[0].outdata.c_str(), ops[0].outdata.length());
+  *outdatalen = ops[0].outdata.length();
+
+  return *outdatalen;
+}
+
+int cls_get_request_origin(cls_method_context_t hctx, entity_inst_t *origin)
+{
+  PrimaryLogPG::OpContext **pctx = static_cast<PrimaryLogPG::OpContext **>(hctx);
+  *origin = (*pctx)->op->get_req()->get_orig_source_inst();
+  return 0;
+}
+
+int cls_cxx_create(cls_method_context_t hctx, bool exclusive)
+{
+  PrimaryLogPG::OpContext **pctx = (PrimaryLogPG::OpContext **)hctx;
+  vector<OSDOp> ops(1);
+  ops[0].op.op = CEPH_OSD_OP_CREATE;
+  ops[0].op.flags = (exclusive ? CEPH_OSD_OP_FLAG_EXCL : 0);
+  return (*pctx)->pg->do_osd_ops(*pctx, ops);
+}
+
+int cls_cxx_remove(cls_method_context_t hctx)
+{
+  PrimaryLogPG::OpContext **pctx = (PrimaryLogPG::OpContext **)hctx;
+  vector<OSDOp> ops(1);
+  ops[0].op.op = CEPH_OSD_OP_DELETE;
+  return (*pctx)->pg->do_osd_ops(*pctx, ops);
+}
+
+int cls_cxx_stat(cls_method_context_t hctx, uint64_t *size, time_t *mtime)
+{
+  PrimaryLogPG::OpContext **pctx = (PrimaryLogPG::OpContext **)hctx;
+  vector<OSDOp> ops(1);
+  int ret;
+  ops[0].op.op = CEPH_OSD_OP_STAT;
+  ret = (*pctx)->pg->do_osd_ops(*pctx, ops);
+  if (ret < 0)
+    return ret;
+  auto iter = ops[0].outdata.cbegin();
+  utime_t ut;
+  uint64_t s;
+  try {
+    decode(s, iter);
+    decode(ut, iter);
+  } catch (ceph::buffer::error& err) {
+    return -EIO;
+  }
+  if (size)
+    *size = s;
+  if (mtime)
+    *mtime = ut.sec();
+  return 0;
+}
+
+int cls_cxx_stat2(cls_method_context_t hctx, uint64_t *size, ceph::real_time *mtime)
+{
+  PrimaryLogPG::OpContext **pctx = (PrimaryLogPG::OpContext **)hctx;
+  vector<OSDOp> ops(1);
+  int ret;
+  ops[0].op.op = CEPH_OSD_OP_STAT;
+  ret = (*pctx)->pg->do_osd_ops(*pctx, ops);
+  if (ret < 0)
+    return ret;
+  auto iter = ops[0].outdata.cbegin();
+  real_time ut;
+  uint64_t s;
+  try {
+    decode(s, iter);
+    decode(ut, iter);
+  } catch (ceph::buffer::error& err) {
+    return -EIO;
+  }
+  if (size)
+    *size = s;
+  if (mtime)
+    *mtime = ut;
+  return 0;
+}
+
+int cls_cxx_read2(cls_method_context_t hctx, int ofs, int len,
+                  bufferlist *outbl, uint32_t op_flags)
+{
+  PrimaryLogPG::OpContext **pctx = (PrimaryLogPG::OpContext **)hctx;
+  vector<OSDOp> ops(1);
+  int ret;
+  ops[0].op.op = CEPH_OSD_OP_SYNC_READ;
+  ops[0].op.extent.offset = ofs;
+  ops[0].op.extent.length = len;
+  ops[0].op.flags = op_flags;
+  ret = (*pctx)->pg->do_osd_ops(*pctx, ops);
+  if (ret < 0)
+    return ret;
+  *outbl = std::move(ops[0].outdata);
+  return outbl->length();
+}
+
+int cls_cxx_write2(cls_method_context_t hctx, int ofs, int len,
+                   bufferlist *inbl, uint32_t op_flags)
+{
+  PrimaryLogPG::OpContext **pctx = (PrimaryLogPG::OpContext **)hctx;
+  vector<OSDOp> ops(1);
+  ops[0].op.op = CEPH_OSD_OP_WRITE;
+  ops[0].op.extent.offset = ofs;
+  ops[0].op.extent.length = len;
+  ops[0].op.flags = op_flags;
+  ops[0].indata = *inbl;
+  return (*pctx)->pg->do_osd_ops(*pctx, ops);
+}
+
+int cls_cxx_write_full(cls_method_context_t hctx, bufferlist *inbl)
+{
+  PrimaryLogPG::OpContext **pctx = (PrimaryLogPG::OpContext **)hctx;
+  vector<OSDOp> ops(1);
+  ops[0].op.op = CEPH_OSD_OP_WRITEFULL;
+  ops[0].op.extent.offset = 0;
+  ops[0].op.extent.length = inbl->length();
+  ops[0].indata = *inbl;
+  return (*pctx)->pg->do_osd_ops(*pctx, ops);
+}
+
+int cls_cxx_replace(cls_method_context_t hctx, int ofs, int len, bufferlist *inbl)
+{
+  PrimaryLogPG::OpContext **pctx = (PrimaryLogPG::OpContext **)hctx;
+  vector<OSDOp> ops(2);
+  ops[0].op.op = CEPH_OSD_OP_TRUNCATE;
+  ops[0].op.extent.offset = 0;
+  ops[0].op.extent.length = 0;
+  ops[1].op.op = CEPH_OSD_OP_WRITE;
+  ops[1].op.extent.offset = ofs;
+  ops[1].op.extent.length = len;
+  ops[1].indata = *inbl;
+  return (*pctx)->pg->do_osd_ops(*pctx, ops);
+}
+
+int cls_cxx_truncate(cls_method_context_t hctx, int ofs)
+{
+  PrimaryLogPG::OpContext **pctx = (PrimaryLogPG::OpContext **)hctx;
+  vector<OSDOp> ops(1);
+  ops[0].op.op = CEPH_OSD_OP_TRUNCATE;
+  ops[0].op.extent.offset = ofs;
+  ops[0].op.extent.length = 0;
+  return (*pctx)->pg->do_osd_ops(*pctx, ops);
+}
+
+int cls_cxx_write_zero(cls_method_context_t hctx, int ofs, int len)
+{
+  PrimaryLogPG::OpContext **pctx = (PrimaryLogPG::OpContext **)hctx;
+  vector<OSDOp> ops(1);
+  ops[0].op.op = CEPH_OSD_OP_ZERO;
+  ops[0].op.extent.offset = ofs;
+  ops[0].op.extent.length = len;
+  return (*pctx)->pg->do_osd_ops(*pctx, ops);
+}
+
+int cls_cxx_getxattr(cls_method_context_t hctx, const char *name,
+                     bufferlist *outbl)
+{
+  PrimaryLogPG::OpContext **pctx = (PrimaryLogPG::OpContext **)hctx;
+  vector<OSDOp> nops(1);
+  OSDOp& op = nops[0];
+  int r;
+
+  op.op.op = CEPH_OSD_OP_GETXATTR;
+  op.op.xattr.name_len = strlen(name);
+  op.indata.append(name, op.op.xattr.name_len);
+  r = (*pctx)->pg->do_osd_ops(*pctx, nops);
+  if (r < 0)
+    return r;
+
+  *outbl = std::move(op.outdata);
+  return outbl->length();
+}
+
+int cls_cxx_getxattrs(cls_method_context_t hctx, map<string, bufferlist> *attrset)
+{
+  PrimaryLogPG::OpContext **pctx = (PrimaryLogPG::OpContext **)hctx;
+  vector<OSDOp> nops(1);
+  OSDOp& op = nops[0];
+  int r;
+
+  op.op.op = CEPH_OSD_OP_GETXATTRS;
+  r = (*pctx)->pg->do_osd_ops(*pctx, nops);
+  if (r < 0)
+    return r;
+
+  auto iter = op.outdata.cbegin();
+  try {
+    decode(*attrset, iter);
+  } catch (ceph::buffer::error& err) {
+    return -EIO;
+  }
+  return 0;
+}
+
+int cls_cxx_setxattr(cls_method_context_t hctx, const char *name,
+                     bufferlist *inbl)
+{
+  PrimaryLogPG::OpContext **pctx = (PrimaryLogPG::OpContext **)hctx;
+  vector<OSDOp> nops(1);
+  OSDOp& op = nops[0];
+  int r;
+
+  op.op.op = CEPH_OSD_OP_SETXATTR;
+  op.op.xattr.name_len = strlen(name);
+  op.op.xattr.value_len = inbl->length();
+  op.indata.append(name, op.op.xattr.name_len);
+  op.indata.append(*inbl);
+  r = (*pctx)->pg->do_osd_ops(*pctx, nops);
+
+  return r;
+}
+
+int cls_cxx_snap_revert(cls_method_context_t hctx, snapid_t snapid)
+{
+  PrimaryLogPG::OpContext **pctx = (PrimaryLogPG::OpContext **)hctx;
+  vector<OSDOp> ops(1);
+  ops[0].op.op = CEPH_OSD_OP_ROLLBACK;
+  ops[0].op.snap.snapid = snapid;
+  return (*pctx)->pg->do_osd_ops(*pctx, ops);
+}
+
+int cls_cxx_map_get_all_vals(cls_method_context_t hctx, map<string, bufferlist>* vals,
+                             bool *more)
+{
+  PrimaryLogPG::OpContext **pctx = (PrimaryLogPG::OpContext **)hctx;
+  vector<OSDOp> ops(1);
+  OSDOp& op = ops[0];
+  int ret;
+
+  string start_after;
+  string filter_prefix;
+  uint64_t max = (uint64_t)-1;
+
+  encode(start_after, op.indata);
+  encode(max, op.indata);
+  encode(filter_prefix, op.indata);
+
+  op.op.op = CEPH_OSD_OP_OMAPGETVALS;
+  
+  ret = (*pctx)->pg->do_osd_ops(*pctx, ops);
+  if (ret < 0)
+    return ret;
+
+  auto iter = op.outdata.cbegin();
+  try {
+    decode(*vals, iter);
+    decode(*more, iter);
+  } catch (ceph::buffer::error& err) {
+    return -EIO;
+  }
+  return vals->size();
+}
+
+int cls_cxx_map_get_keys(cls_method_context_t hctx, const string &start_obj,
+			 uint64_t max_to_get, set<string> *keys,
+                         bool *more)
+{
+  PrimaryLogPG::OpContext **pctx = (PrimaryLogPG::OpContext **)hctx;
+  vector<OSDOp> ops(1);
+  OSDOp& op = ops[0];
+  int ret;
+
+  encode(start_obj, op.indata);
+  encode(max_to_get, op.indata);
+
+  op.op.op = CEPH_OSD_OP_OMAPGETKEYS;
+
+  ret = (*pctx)->pg->do_osd_ops(*pctx, ops);
+  if (ret < 0)
+    return ret;
+
+  auto iter = op.outdata.cbegin();
+  try {
+    decode(*keys, iter);
+    decode(*more, iter);
+  } catch (ceph::buffer::error& err) {
+    return -EIO;
+  }
+  return keys->size();
+}
+
+int cls_cxx_map_get_vals(cls_method_context_t hctx, const string &start_obj,
+			 const string &filter_prefix, uint64_t max_to_get,
+			 map<string, bufferlist> *vals, bool *more)
+{
+  PrimaryLogPG::OpContext **pctx = (PrimaryLogPG::OpContext **)hctx;
+  vector<OSDOp> ops(1);
+  OSDOp& op = ops[0];
+  int ret;
+
+  encode(start_obj, op.indata);
+  encode(max_to_get, op.indata);
+  encode(filter_prefix, op.indata);
+
+  op.op.op = CEPH_OSD_OP_OMAPGETVALS;
+  
+  ret = (*pctx)->pg->do_osd_ops(*pctx, ops);
+  if (ret < 0)
+    return ret;
+
+  auto iter = op.outdata.cbegin();
+  try {
+    decode(*vals, iter);
+    decode(*more, iter);
+  } catch (ceph::buffer::error& err) {
+    return -EIO;
+  }
+  return vals->size();
+}
+
+int cls_cxx_map_read_header(cls_method_context_t hctx, bufferlist *outbl)
+{
+  PrimaryLogPG::OpContext **pctx = (PrimaryLogPG::OpContext **)hctx;
+  vector<OSDOp> ops(1);
+  OSDOp& op = ops[0];
+  int ret;
+  op.op.op = CEPH_OSD_OP_OMAPGETHEADER;
+  ret = (*pctx)->pg->do_osd_ops(*pctx, ops);
+  if (ret < 0)
+    return ret;
+
+  *outbl = std::move(op.outdata);
+
+  return 0;
+}
+
+int cls_cxx_map_get_val(cls_method_context_t hctx, const string &key,
+			bufferlist *outbl)
+{
+  PrimaryLogPG::OpContext **pctx = (PrimaryLogPG::OpContext **)hctx;
+  vector<OSDOp> ops(1);
+  OSDOp& op = ops[0];
+  int ret;
+
+  set<string> k;
+  k.insert(key);
+  encode(k, op.indata);
+
+  op.op.op = CEPH_OSD_OP_OMAPGETVALSBYKEYS;
+  ret = (*pctx)->pg->do_osd_ops(*pctx, ops);
+  if (ret < 0)
+    return ret;
+
+  auto iter = op.outdata.cbegin();
+  try {
+    map<string, bufferlist> m;
+
+    decode(m, iter);
+    map<string, bufferlist>::iterator iter = m.begin();
+    if (iter == m.end())
+      return -ENOENT;
+
+    *outbl = iter->second;
+  } catch (ceph::buffer::error& e) {
+    return -EIO;
+  }
+  return 0;
+}
+
+int cls_cxx_map_get_vals_by_keys(cls_method_context_t hctx,
+                                 const std::set<std::string> &keys,
+                                 std::map<std::string, bufferlist> *map)
+{
+  PrimaryLogPG::OpContext **pctx = (PrimaryLogPG::OpContext **)hctx;
+  vector<OSDOp> ops(1);
+  OSDOp& op = ops[0];
+  int ret;
+
+  encode(keys, op.indata);
+
+  op.op.op = CEPH_OSD_OP_OMAPGETVALSBYKEYS;
+  ret = (*pctx)->pg->do_osd_ops(*pctx, ops);
+  if (ret < 0)
+    return ret;
+
+  auto iter = op.outdata.cbegin();
+  try {
+    decode(*map, iter);
+  } catch (buffer::error& e) {
+    return -EIO;
+  }
+  return 0;
+}
+
+int cls_cxx_map_set_val(cls_method_context_t hctx, const string &key,
+			bufferlist *inbl)
+{
+  PrimaryLogPG::OpContext **pctx = (PrimaryLogPG::OpContext **)hctx;
+  vector<OSDOp> ops(1);
+  OSDOp& op = ops[0];
+  bufferlist& update_bl = op.indata;
+  map<string, bufferlist> m;
+  m[key] = *inbl;
+  encode(m, update_bl);
+
+  op.op.op = CEPH_OSD_OP_OMAPSETVALS;
+
+  return (*pctx)->pg->do_osd_ops(*pctx, ops);
+}
+
+int cls_cxx_map_set_vals(cls_method_context_t hctx,
+			 const std::map<string, bufferlist> *map)
+{
+  PrimaryLogPG::OpContext **pctx = (PrimaryLogPG::OpContext **)hctx;
+  vector<OSDOp> ops(1);
+  OSDOp& op = ops[0];
+  bufferlist& update_bl = op.indata;
+  encode(*map, update_bl);
+
+  op.op.op = CEPH_OSD_OP_OMAPSETVALS;
+
+  return (*pctx)->pg->do_osd_ops(*pctx, ops);
+}
+
+int cls_cxx_map_clear(cls_method_context_t hctx)
+{
+  PrimaryLogPG::OpContext **pctx = (PrimaryLogPG::OpContext **)hctx;
+  vector<OSDOp> ops(1);
+  OSDOp& op = ops[0];
+
+  op.op.op = CEPH_OSD_OP_OMAPCLEAR;
+
+  return (*pctx)->pg->do_osd_ops(*pctx, ops);
+}
+
+int cls_cxx_map_write_header(cls_method_context_t hctx, bufferlist *inbl)
+{
+  PrimaryLogPG::OpContext **pctx = (PrimaryLogPG::OpContext **)hctx;
+  vector<OSDOp> ops(1);
+  OSDOp& op = ops[0];
+  op.indata = std::move(*inbl);
+
+  op.op.op = CEPH_OSD_OP_OMAPSETHEADER;
+
+  return (*pctx)->pg->do_osd_ops(*pctx, ops);
+}
+
+int cls_cxx_map_remove_range(cls_method_context_t hctx,
+                             const std::string& key_begin,
+                             const std::string& key_end)
+{
+  PrimaryLogPG::OpContext **pctx = (PrimaryLogPG::OpContext **)hctx;
+  vector<OSDOp> ops(1);
+  OSDOp& op = ops[0];
+  bufferlist& update_bl = op.indata;
+
+  ::encode(key_begin, update_bl);
+  ::encode(key_end, update_bl);
+
+  op.op.op = CEPH_OSD_OP_OMAPRMKEYRANGE;
+
+  return (*pctx)->pg->do_osd_ops(*pctx, ops);
+}
+
+int cls_cxx_map_remove_key(cls_method_context_t hctx, const string &key)
+{
+  PrimaryLogPG::OpContext **pctx = (PrimaryLogPG::OpContext **)hctx;
+  vector<OSDOp> ops(1);
+  OSDOp& op = ops[0];
+  bufferlist& update_bl = op.indata;
+  set<string> to_rm;
+  to_rm.insert(key);
+
+  encode(to_rm, update_bl);
+
+  op.op.op = CEPH_OSD_OP_OMAPRMKEYS;
+
+  return (*pctx)->pg->do_osd_ops(*pctx, ops);
+}
+
+int cls_cxx_list_watchers(cls_method_context_t hctx,
+			  obj_list_watch_response_t *watchers)
+{
+  PrimaryLogPG::OpContext **pctx = (PrimaryLogPG::OpContext **)hctx;
+  vector<OSDOp> nops(1);
+  OSDOp& op = nops[0];
+  int r;
+
+  op.op.op = CEPH_OSD_OP_LIST_WATCHERS;
+  r = (*pctx)->pg->do_osd_ops(*pctx, nops);
+  if (r < 0)
+    return r;
+
+  auto iter = op.outdata.cbegin();
+  try {
+    decode(*watchers, iter);
+  } catch (ceph::buffer::error& err) {
+    return -EIO;
+  }
+  return 0;
+}
+
+uint64_t cls_current_version(cls_method_context_t hctx)
+{
+  PrimaryLogPG::OpContext *ctx = *(PrimaryLogPG::OpContext **)hctx;
+
+  return ctx->pg->get_last_user_version();
+}
+
+int cls_current_subop_num(cls_method_context_t hctx)
+{
+  PrimaryLogPG::OpContext *ctx = *(PrimaryLogPG::OpContext **)hctx;
+
+  return ctx->processed_subop_count;
+}
+
+uint64_t cls_get_features(cls_method_context_t hctx)
+{
+  PrimaryLogPG::OpContext *ctx = *(PrimaryLogPG::OpContext **)hctx;
+  return ctx->pg->get_osdmap()->get_up_osd_features();
+}
+
+uint64_t cls_get_client_features(cls_method_context_t hctx)
+{
+  PrimaryLogPG::OpContext *ctx = *(PrimaryLogPG::OpContext **)hctx;
+  return ctx->op->get_req()->get_connection()->get_features();
+}
+
+ceph_release_t cls_get_required_osd_release(cls_method_context_t hctx)
+{
+  PrimaryLogPG::OpContext *ctx = *(PrimaryLogPG::OpContext **)hctx;
+  return ctx->pg->get_osdmap()->require_osd_release;
+}
+
+ceph_release_t cls_get_min_compatible_client(cls_method_context_t hctx)
+{
+  PrimaryLogPG::OpContext *ctx = *(PrimaryLogPG::OpContext **)hctx;
+  return ctx->pg->get_osdmap()->get_require_min_compat_client();
+}
+
+const ConfigProxy& cls_get_config(cls_method_context_t hctx)
+{
+  PrimaryLogPG::OpContext *ctx = *(PrimaryLogPG::OpContext **)hctx;
+  return ctx->pg->get_cct()->_conf;
+}
+
+const object_info_t& cls_get_object_info(cls_method_context_t hctx)
+{
+  PrimaryLogPG::OpContext *ctx = *(PrimaryLogPG::OpContext **)hctx;
+  return ctx->obs->oi;
+}
+
+int cls_get_snapset_seq(cls_method_context_t hctx, uint64_t *snap_seq) {
+  PrimaryLogPG::OpContext *ctx = *(PrimaryLogPG::OpContext **)hctx;
+  if (!ctx->new_obs.exists || (ctx->new_obs.oi.is_whiteout() &&
+                               ctx->obc->ssc->snapset.clones.empty())) {
+    return -ENOENT;
+  }
+  *snap_seq = ctx->obc->ssc->snapset.seq;
+  return 0;
+}
+
+int cls_cxx_chunk_write_and_set(cls_method_context_t hctx, int ofs, int len,
+				bufferlist *write_inbl, uint32_t op_flags,
+				bufferlist *set_inbl, int set_len)
+{
+  PrimaryLogPG::OpContext **pctx = (PrimaryLogPG::OpContext **)hctx;
+  char cname[] = "cas";
+  char method[] = "chunk_set";
+
+  vector<OSDOp> ops(2);
+  ops[0].op.op = CEPH_OSD_OP_WRITE;
+  ops[0].op.extent.offset = ofs;
+  ops[0].op.extent.length = len;
+  ops[0].op.flags = op_flags;
+  ops[0].indata = *write_inbl;
+
+  ops[1].op.op = CEPH_OSD_OP_CALL;
+  ops[1].op.cls.class_len = strlen(cname);
+  ops[1].op.cls.method_len = strlen(method);
+  ops[1].op.cls.indata_len = set_len;
+  ops[1].indata.append(cname, ops[1].op.cls.class_len);
+  ops[1].indata.append(method, ops[1].op.cls.method_len);
+  ops[1].indata.append(*set_inbl);
+
+  return (*pctx)->pg->do_osd_ops(*pctx, ops);
+}
+
+int cls_get_manifest_ref_count(cls_method_context_t hctx, string fp_oid)
+{
+  PrimaryLogPG::OpContext *ctx = *(PrimaryLogPG::OpContext **)hctx;
+  return ctx->pg->get_manifest_ref_count(ctx->obc, fp_oid, ctx->op);
+}
+
+uint64_t cls_get_osd_min_alloc_size(cls_method_context_t hctx) {
+  PrimaryLogPG::OpContext *ctx = *(PrimaryLogPG::OpContext **)hctx;
+
+  return ctx->pg->get_min_alloc_size();
+}
+
+uint64_t cls_get_pool_stripe_width(cls_method_context_t hctx)
+{
+  PrimaryLogPG::OpContext *ctx = *(PrimaryLogPG::OpContext **)hctx;
+
+  return ctx->pg->get_pool().stripe_width;
+}
+
+struct GatherFinisher : public PrimaryLogPG::OpFinisher {
+  std::map<std::string, bufferlist> src_obj_buffs;
+  OSDOp *osd_op;
+  GatherFinisher(OSDOp *osd_op_) : osd_op(osd_op_) {}
+  int execute() override {
+    return 0;
+  }
+};
+
+int cls_cxx_gather(cls_method_context_t hctx, const std::set<std::string> &src_objs, const std::string& pool,
+		   const char *cls, const char *method, bufferlist& inbl)
+{
+  PrimaryLogPG::OpContext **pctx = (PrimaryLogPG::OpContext**)hctx;
+  int subop_num = (*pctx)->current_osd_subop_num;
+  OSDOp *osd_op = &(*(*pctx)->ops)[subop_num];
+  auto [iter, inserted] = (*pctx)->op_finishers.emplace(std::make_pair(subop_num, std::make_unique<GatherFinisher>(osd_op)));
+  assert(inserted);
+  auto &gather = *static_cast<GatherFinisher*>(iter->second.get());
+  for (const auto &obj : src_objs) {
+    gather.src_obj_buffs[obj] = bufferlist();
+  }
+  return (*pctx)->pg->start_cls_gather(*pctx, &gather.src_obj_buffs, pool, cls, method, inbl);
+}
+
+int cls_cxx_get_gathered_data(cls_method_context_t hctx, std::map<std::string, bufferlist> *results)
+{
+  assert(results);
+  PrimaryLogPG::OpContext **pctx = (PrimaryLogPG::OpContext**)hctx;
+  PrimaryLogPG::OpFinisher* op_finisher = nullptr;
+  int r = 0;
+  {
+    auto op_finisher_it = (*pctx)->op_finishers.find((*pctx)->current_osd_subop_num);
+    if (op_finisher_it != (*pctx)->op_finishers.end()) {
+      op_finisher = op_finisher_it->second.get();
+    }
+  }
+  if (op_finisher == nullptr) {
+    results->clear();
+  } else {
+    GatherFinisher *gf = (GatherFinisher*)op_finisher;
+    *results = std::move(gf->src_obj_buffs);
+    r = gf->osd_op->rval;
+  }
+  return r;
+}
+
+// although at first glance the implementation looks the same as in
+// crimson-osd, it's different b/c of how the dout macro expands.
+int cls_log(int level, const char *format, ...)
+{
+   size_t size = 256;
+   va_list ap;
+   while (1) {
+     boost::container::small_vector<char, 256> buf(size);
+     va_start(ap, format);
+     int n = vsnprintf(buf.data(), size, format, ap);
+     va_end(ap);
+#define MAX_SIZE 8196UL
+     if ((n > -1 && static_cast<size_t>(n) < size) || size > MAX_SIZE) {
+       dout(ceph::dout::need_dynamic(level)) << buf.data() << dendl;
+       return n;
+     }
+     size *= 2;
+   }
+}