1 files changed, 498 insertions, 0 deletions
diff --git a/src/cls/journal/cls_journal_client.cc b/src/cls/journal/cls_journal_client.cc
new file mode 100644
index 00000000..c22a32cf
--- /dev/null
+++ b/src/cls/journal/cls_journal_client.cc
@@ -0,0 +1,498 @@
+// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
+// vim: ts=8 sw=2 smarttab
+
+#include "cls/journal/cls_journal_client.h"
+#include "include/rados/librados.hpp"
+#include "include/buffer.h"
+#include "include/Context.h"
+#include "common/Cond.h"
+#include <errno.h>
+
+namespace cls {
+namespace journal {
+namespace client {
+using ceph::encode;
+using ceph::decode;
+
+namespace {
+
+struct C_AioExec : public Context {
+  librados::IoCtx &ioctx;
+  std::string oid;
+
+  C_AioExec(librados::IoCtx &_ioctx, const std::string &_oid)
+    : ioctx(_ioctx), oid(_oid) {
+  }
+
+  static void rados_callback(rados_completion_t c, void *arg) {
+    Context *ctx = reinterpret_cast<Context *>(arg);
+    ctx->complete(rados_aio_get_return_value(c));
+  }
+};
+
+struct C_ClientList : public C_AioExec {
+  std::set<cls::journal::Client> *clients;
+  Context *on_finish;
+  bufferlist outbl;
+
+  C_ClientList(librados::IoCtx &_ioctx, const std::string &_oid,
+               std::set<cls::journal::Client> *_clients,
+               Context *_on_finish)
+    : C_AioExec(_ioctx, _oid), clients(_clients), on_finish(_on_finish) {}
+
+  void send(const std::string &start_after) {
+    bufferlist inbl;
+    encode(start_after, inbl);
+    encode(JOURNAL_MAX_RETURN, inbl);
+
+    librados::ObjectReadOperation op;
+    op.exec("journal", "client_list", inbl);
+
+    outbl.clear();
+    librados::AioCompletion *rados_completion =
+       librados::Rados::aio_create_completion(this, rados_callback, NULL);
+    int r = ioctx.aio_operate(oid, rados_completion, &op, &outbl);
+    ceph_assert(r == 0);
+    rados_completion->release();
+  }
+
+  void complete(int r) override {
+    if (r < 0) {
+      finish(r);
+      return;
+    }
+
+    try {
+      auto iter = outbl.cbegin();
+      std::set<cls::journal::Client> partial_clients;
+      decode(partial_clients, iter);
+
+      std::string start_after;
+      if (!partial_clients.empty()) {
+        start_after = partial_clients.rbegin()->id;
+        clients->insert(partial_clients.begin(), partial_clients.end());
+      }
+
+      if (partial_clients.size() < JOURNAL_MAX_RETURN) {
+        finish(0);
+      } else {
+        send(start_after);
+      }
+    } catch (const buffer::error &err) {
+      finish(-EBADMSG);
+    }
+  }
+
+  void finish(int r) override {
+    on_finish->complete(r);
+    delete this;
+  }
+};
+
+struct C_ImmutableMetadata : public C_AioExec {
+  uint8_t *order;
+  uint8_t *splay_width;
+  int64_t *pool_id;
+  Context *on_finish;
+  bufferlist outbl;
+
+  C_ImmutableMetadata(librados::IoCtx &_ioctx, const std::string &_oid,
+                      uint8_t *_order, uint8_t *_splay_width,
+		      int64_t *_pool_id, Context *_on_finish)
+    : C_AioExec(_ioctx, _oid), order(_order), splay_width(_splay_width),
+      pool_id(_pool_id), on_finish(_on_finish) {
+  }
+
+  void send() {
+    librados::ObjectReadOperation op;
+    bufferlist inbl;
+    op.exec("journal", "get_order", inbl);
+    op.exec("journal", "get_splay_width", inbl);
+    op.exec("journal", "get_pool_id", inbl);
+
+    librados::AioCompletion *rados_completion =
+      librados::Rados::aio_create_completion(this, rados_callback, NULL);
+    int r = ioctx.aio_operate(oid, rados_completion, &op, &outbl);
+    ceph_assert(r == 0);
+    rados_completion->release();
+  }
+
+  void finish(int r) override {
+    if (r == 0) {
+      try {
+        auto iter = outbl.cbegin();
+        decode(*order, iter);
+        decode(*splay_width, iter);
+        decode(*pool_id, iter);
+      } catch (const buffer::error &err) {
+        r = -EBADMSG;
+      }
+    }
+    on_finish->complete(r);
+  }
+};
+
+struct C_MutableMetadata : public C_AioExec {
+  uint64_t *minimum_set;
+  uint64_t *active_set;
+  C_ClientList *client_list;
+  bufferlist outbl;
+
+  C_MutableMetadata(librados::IoCtx &_ioctx, const std::string &_oid,
+                    uint64_t *_minimum_set, uint64_t *_active_set,
+                    C_ClientList *_client_list)
+    : C_AioExec(_ioctx, _oid), minimum_set(_minimum_set),
+      active_set(_active_set), client_list(_client_list) {}
+
+  void send() {
+    librados::ObjectReadOperation op;
+    bufferlist inbl;
+    op.exec("journal", "get_minimum_set", inbl);
+    op.exec("journal", "get_active_set", inbl);
+
+    librados::AioCompletion *rados_completion =
+      librados::Rados::aio_create_completion(this, rados_callback, NULL);
+    int r = ioctx.aio_operate(oid, rados_completion, &op, &outbl);
+    ceph_assert(r == 0);
+    rados_completion->release();
+  }
+
+  void finish(int r) override {
+    if (r == 0) {
+      try {
+        auto iter = outbl.cbegin();
+        decode(*minimum_set, iter);
+        decode(*active_set, iter);
+        client_list->send("");
+      } catch (const buffer::error &err) {
+        r = -EBADMSG;
+      }
+    }
+    if (r < 0) {
+      client_list->complete(r);
+    }
+  }
+};
+
+
+} // anonymous namespace
+
+void create(librados::ObjectWriteOperation *op,
+            uint8_t order, uint8_t splay, int64_t pool_id) {
+  bufferlist bl;
+  encode(order, bl);
+  encode(splay, bl);
+  encode(pool_id, bl);
+
+  op->exec("journal", "create", bl);
+}
+
+int create(librados::IoCtx &ioctx, const std::string &oid, uint8_t order,
+           uint8_t splay, int64_t pool_id) {
+  librados::ObjectWriteOperation op;
+  create(&op, order, splay, pool_id);
+
+  int r = ioctx.operate(oid, &op);
+  if (r < 0) {
+    return r;
+  }
+  return 0;
+}
+
+void get_immutable_metadata(librados::IoCtx &ioctx, const std::string &oid,
+                            uint8_t *order, uint8_t *splay_width,
+                            int64_t *pool_id, Context *on_finish) {
+  C_ImmutableMetadata *metadata = new C_ImmutableMetadata(ioctx, oid, order,
+                                                          splay_width, pool_id,
+                                                          on_finish);
+  metadata->send();
+}
+
+void get_mutable_metadata(librados::IoCtx &ioctx, const std::string &oid,
+                          uint64_t *minimum_set, uint64_t *active_set,
+                          std::set<cls::journal::Client> *clients,
+                          Context *on_finish) {
+  C_ClientList *client_list = new C_ClientList(ioctx, oid, clients, on_finish);
+  C_MutableMetadata *metadata = new C_MutableMetadata(
+    ioctx, oid, minimum_set, active_set, client_list);
+  metadata->send();
+}
+
+void set_minimum_set(librados::ObjectWriteOperation *op, uint64_t object_set) {
+  bufferlist bl;
+  encode(object_set, bl);
+  op->exec("journal", "set_minimum_set", bl);
+}
+
+void set_active_set(librados::ObjectWriteOperation *op, uint64_t object_set) {
+  bufferlist bl;
+  encode(object_set, bl);
+  op->exec("journal", "set_active_set", bl);
+}
+
+int get_client(librados::IoCtx &ioctx, const std::string &oid,
+               const std::string &id, cls::journal::Client *client) {
+  librados::ObjectReadOperation op;
+  get_client_start(&op, id);
+
+  bufferlist out_bl;
+  int r = ioctx.operate(oid, &op, &out_bl);
+  if (r < 0) {
+    return r;
+  }
+
+  auto iter = out_bl.cbegin();
+  r = get_client_finish(&iter, client);
+  if (r < 0) {
+    return r;
+  }
+  return 0;
+}
+
+void get_client_start(librados::ObjectReadOperation *op,
+                      const std::string &id) {
+  bufferlist bl;
+  encode(id, bl);
+  op->exec("journal", "get_client", bl);
+}
+
+int get_client_finish(bufferlist::const_iterator *iter,
+                      cls::journal::Client *client) {
+  try {
+    decode(*client, *iter);
+  } catch (const buffer::error &err) {
+    return -EBADMSG;
+  }
+  return 0;
+}
+
+int client_register(librados::IoCtx &ioctx, const std::string &oid,
+                    const std::string &id, const bufferlist &data) {
+  librados::ObjectWriteOperation op;
+  client_register(&op, id, data);
+  return ioctx.operate(oid, &op);
+}
+
+void client_register(librados::ObjectWriteOperation *op,
+                     const std::string &id, const bufferlist &data) {
+  bufferlist bl;
+  encode(id, bl);
+  encode(data, bl);
+  op->exec("journal", "client_register", bl);
+}
+
+int client_update_data(librados::IoCtx &ioctx, const std::string &oid,
+                       const std::string &id, const bufferlist &data) {
+  librados::ObjectWriteOperation op;
+  client_update_data(&op, id, data);
+  return ioctx.operate(oid, &op);
+}
+
+void client_update_data(librados::ObjectWriteOperation *op,
+                        const std::string &id, const bufferlist &data) {
+  bufferlist bl;
+  encode(id, bl);
+  encode(data, bl);
+  op->exec("journal", "client_update_data", bl);
+}
+
+int client_update_state(librados::IoCtx &ioctx, const std::string &oid,
+                        const std::string &id, cls::journal::ClientState state) {
+  librados::ObjectWriteOperation op;
+  client_update_state(&op, id, state);
+  return ioctx.operate(oid, &op);
+}
+
+void client_update_state(librados::ObjectWriteOperation *op,
+                         const std::string &id,
+                         cls::journal::ClientState state) {
+  bufferlist bl;
+  encode(id, bl);
+  encode(static_cast<uint8_t>(state), bl);
+  op->exec("journal", "client_update_state", bl);
+}
+
+int client_unregister(librados::IoCtx &ioctx, const std::string &oid,
+                       const std::string &id) {
+  librados::ObjectWriteOperation op;
+  client_unregister(&op, id);
+  return ioctx.operate(oid, &op);
+}
+
+void client_unregister(librados::ObjectWriteOperation *op,
+		       const std::string &id) {
+
+  bufferlist bl;
+  encode(id, bl);
+  op->exec("journal", "client_unregister", bl);
+}
+
+void client_commit(librados::ObjectWriteOperation *op, const std::string &id,
+                   const cls::journal::ObjectSetPosition &commit_position) {
+  bufferlist bl;
+  encode(id, bl);
+  encode(commit_position, bl);
+  op->exec("journal", "client_commit", bl);
+}
+
+int client_list(librados::IoCtx &ioctx, const std::string &oid,
+                std::set<cls::journal::Client> *clients) {
+  C_SaferCond cond;
+  client_list(ioctx, oid, clients, &cond);
+  return cond.wait();
+}
+
+void client_list(librados::IoCtx &ioctx, const std::string &oid,
+                 std::set<cls::journal::Client> *clients, Context *on_finish) {
+  C_ClientList *client_list = new C_ClientList(ioctx, oid, clients, on_finish);
+  client_list->send("");
+}
+
+int get_next_tag_tid(librados::IoCtx &ioctx, const std::string &oid,
+                     uint64_t *tag_tid) {
+  librados::ObjectReadOperation op;
+  get_next_tag_tid_start(&op);
+
+  bufferlist out_bl;
+  int r = ioctx.operate(oid, &op, &out_bl);
+  if (r < 0) {
+    return r;
+  }
+
+  auto iter = out_bl.cbegin();
+  r = get_next_tag_tid_finish(&iter, tag_tid);
+  if (r < 0) {
+    return r;
+  }
+  return 0;
+}
+
+void get_next_tag_tid_start(librados::ObjectReadOperation *op) {
+  bufferlist bl;
+  op->exec("journal", "get_next_tag_tid", bl);
+}
+
+int get_next_tag_tid_finish(bufferlist::const_iterator *iter,
+                            uint64_t *tag_tid) {
+  try {
+    decode(*tag_tid, *iter);
+  } catch (const buffer::error &err) {
+    return -EBADMSG;
+  }
+  return 0;
+}
+
+int get_tag(librados::IoCtx &ioctx, const std::string &oid,
+            uint64_t tag_tid, cls::journal::Tag *tag) {
+  librados::ObjectReadOperation op;
+  get_tag_start(&op, tag_tid);
+
+  bufferlist out_bl;
+  int r = ioctx.operate(oid, &op, &out_bl);
+  if (r < 0) {
+    return r;
+  }
+
+  auto iter = out_bl.cbegin();
+  r = get_tag_finish(&iter, tag);
+  if (r < 0) {
+    return r;
+  }
+  return 0;
+}
+
+void get_tag_start(librados::ObjectReadOperation *op,
+                   uint64_t tag_tid) {
+  bufferlist bl;
+  encode(tag_tid, bl);
+  op->exec("journal", "get_tag", bl);
+}
+
+int get_tag_finish(bufferlist::const_iterator *iter, cls::journal::Tag *tag) {
+  try {
+    decode(*tag, *iter);
+  } catch (const buffer::error &err) {
+    return -EBADMSG;
+  }
+  return 0;
+}
+
+int tag_create(librados::IoCtx &ioctx, const std::string &oid,
+               uint64_t tag_tid, uint64_t tag_class,
+               const bufferlist &data) {
+  librados::ObjectWriteOperation op;
+  tag_create(&op, tag_tid, tag_class, data);
+  return ioctx.operate(oid, &op);
+}
+
+void tag_create(librados::ObjectWriteOperation *op, uint64_t tag_tid,
+                uint64_t tag_class, const bufferlist &data) {
+  bufferlist bl;
+  encode(tag_tid, bl);
+  encode(tag_class, bl);
+  encode(data, bl);
+  op->exec("journal", "tag_create", bl);
+}
+
+int tag_list(librados::IoCtx &ioctx, const std::string &oid,
+             const std::string &client_id, boost::optional<uint64_t> tag_class,
+             std::set<cls::journal::Tag> *tags) {
+  tags->clear();
+  uint64_t start_after_tag_tid = 0;
+  while (true) {
+    librados::ObjectReadOperation op;
+    tag_list_start(&op, start_after_tag_tid, JOURNAL_MAX_RETURN, client_id,
+                   tag_class);
+
+    bufferlist out_bl;
+    int r = ioctx.operate(oid, &op, &out_bl);
+    if (r < 0) {
+      return r;
+    }
+
+    auto iter = out_bl.cbegin();
+    std::set<cls::journal::Tag> decode_tags;
+    r = tag_list_finish(&iter, &decode_tags);
+    if (r < 0) {
+      return r;
+    }
+
+    tags->insert(decode_tags.begin(), decode_tags.end());
+    if (decode_tags.size() < JOURNAL_MAX_RETURN) {
+      break;
+    }
+  }
+  return 0;
+}
+
+void tag_list_start(librados::ObjectReadOperation *op,
+                    uint64_t start_after_tag_tid, uint64_t max_return,
+                    const std::string &client_id,
+                    boost::optional<uint64_t> tag_class) {
+  bufferlist bl;
+  encode(start_after_tag_tid, bl);
+  encode(max_return, bl);
+  encode(client_id, bl);
+  encode(tag_class, bl);
+  op->exec("journal", "tag_list", bl);
+}
+
+int tag_list_finish(bufferlist::const_iterator *iter,
+                    std::set<cls::journal::Tag> *tags) {
+  try {
+    decode(*tags, *iter);
+  } catch (const buffer::error &err) {
+    return -EBADMSG;
+  }
+  return 0;
+}
+
+void guard_append(librados::ObjectWriteOperation *op, uint64_t soft_max_size) {
+  bufferlist bl;
+  encode(soft_max_size, bl);
+  op->exec("journal", "guard_append", bl);
+}
+
+} // namespace client
+} // namespace journal
+} // namespace cls