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-rw-r--r--src/cls/numops/cls_numops.cc161
-rw-r--r--src/cls/numops/cls_numops_client.cc79
-rw-r--r--src/cls/numops/cls_numops_client.h50
3 files changed, 290 insertions, 0 deletions
diff --git a/src/cls/numops/cls_numops.cc b/src/cls/numops/cls_numops.cc
new file mode 100644
index 00000000..bccfd6d3
--- /dev/null
+++ b/src/cls/numops/cls_numops.cc
@@ -0,0 +1,161 @@
+/*
+ * Ceph - scalable distributed file system
+ *
+ * Copyright (C) 2015 CERN
+ *
+ * Author: Joaquim Rocha <joaquim.rocha@cern.ch>
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ */
+
+/** \file
+ *
+ * This is an OSD class that implements methods for object numeric options on
+ * its omap values.
+ *
+ */
+
+#include "objclass/objclass.h"
+#include <errno.h>
+#include <string>
+#include <sstream>
+#include <cstdio>
+#include <include/compat.h>
+
+#define DECIMAL_PRECISION 10
+
+CLS_VER(1,0)
+CLS_NAME(numops)
+
+static int add(cls_method_context_t hctx, bufferlist *in, bufferlist *out)
+{
+ string key, diff_str;
+
+ auto iter = in->cbegin();
+ try {
+ decode(key, iter);
+ decode(diff_str, iter);
+ } catch (const buffer::error &err) {
+ CLS_LOG(20, "add: invalid decode of input");
+ return -EINVAL;
+ }
+
+ char *end_ptr = 0;
+ double difference = strtod(diff_str.c_str(), &end_ptr);
+
+ if (end_ptr && *end_ptr != '\0') {
+ CLS_ERR("add: invalid input value: %s", diff_str.c_str());
+ return -EINVAL;
+ }
+
+ bufferlist bl;
+ int ret = cls_cxx_map_get_val(hctx, key, &bl);
+
+ double value;
+
+ if (ret == -ENODATA || bl.length() == 0) {
+ value = 0;
+ } else if (ret < 0) {
+ if (ret != -ENOENT) {
+ CLS_ERR("add: error reading omap key %s: %d", key.c_str(), ret);
+ }
+ return ret;
+ } else {
+ std::string stored_value(bl.c_str(), bl.length());
+ end_ptr = 0;
+ value = strtod(stored_value.c_str(), &end_ptr);
+
+ if (end_ptr && *end_ptr != '\0') {
+ CLS_ERR("add: invalid stored value: %s", stored_value.c_str());
+ return -EBADMSG;
+ }
+ }
+
+ value += difference;
+
+ std::stringstream stream;
+ stream << std::setprecision(DECIMAL_PRECISION) << value;
+
+ bufferlist new_value;
+ new_value.append(stream.str());
+
+ return cls_cxx_map_set_val(hctx, key, &new_value);
+}
+
+static int mul(cls_method_context_t hctx, bufferlist *in, bufferlist *out)
+{
+ string key, diff_str;
+
+ auto iter = in->cbegin();
+ try {
+ decode(key, iter);
+ decode(diff_str, iter);
+ } catch (const buffer::error &err) {
+ CLS_LOG(20, "mul: invalid decode of input");
+ return -EINVAL;
+ }
+
+ char *end_ptr = 0;
+ double difference = strtod(diff_str.c_str(), &end_ptr);
+
+ if (end_ptr && *end_ptr != '\0') {
+ CLS_ERR("mul: invalid input value: %s", diff_str.c_str());
+ return -EINVAL;
+ }
+
+ bufferlist bl;
+ int ret = cls_cxx_map_get_val(hctx, key, &bl);
+
+ double value;
+
+ if (ret == -ENODATA || bl.length() == 0) {
+ value = 0;
+ } else if (ret < 0) {
+ if (ret != -ENOENT) {
+ CLS_ERR("mul: error reading omap key %s: %d", key.c_str(), ret);
+ }
+ return ret;
+ } else {
+ std::string stored_value(bl.c_str(), bl.length());
+ end_ptr = 0;
+ value = strtod(stored_value.c_str(), &end_ptr);
+
+ if (end_ptr && *end_ptr != '\0') {
+ CLS_ERR("mul: invalid stored value: %s", stored_value.c_str());
+ return -EBADMSG;
+ }
+ }
+
+ value *= difference;
+
+ std::stringstream stream;
+ stream << std::setprecision(DECIMAL_PRECISION) << value;
+
+ bufferlist new_value;
+ new_value.append(stream.str());
+
+ return cls_cxx_map_set_val(hctx, key, &new_value);
+}
+
+CLS_INIT(numops)
+{
+ CLS_LOG(20, "loading cls_numops");
+
+ cls_handle_t h_class;
+ cls_method_handle_t h_add;
+ cls_method_handle_t h_mul;
+
+ cls_register("numops", &h_class);
+
+ cls_register_cxx_method(h_class, "add",
+ CLS_METHOD_RD | CLS_METHOD_WR,
+ add, &h_add);
+
+ cls_register_cxx_method(h_class, "mul",
+ CLS_METHOD_RD | CLS_METHOD_WR,
+ mul, &h_mul);
+}
diff --git a/src/cls/numops/cls_numops_client.cc b/src/cls/numops/cls_numops_client.cc
new file mode 100644
index 00000000..fa1a69f2
--- /dev/null
+++ b/src/cls/numops/cls_numops_client.cc
@@ -0,0 +1,79 @@
+/*
+ * Ceph - scalable distributed file system
+ *
+ * Copyright (C) 2015 CERN
+ *
+ * Author: Joaquim Rocha <joaquim.rocha@cern.ch>
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ */
+
+#include "cls/numops/cls_numops_client.h"
+#include "include/encoding.h"
+#include "include/rados/librados.hpp"
+
+#include <errno.h>
+#include <sstream>
+
+namespace rados {
+ namespace cls {
+ namespace numops {
+
+ int add(librados::IoCtx *ioctx,
+ const std::string& oid,
+ const std::string& key,
+ double value_to_add)
+ {
+ bufferlist in, out;
+ encode(key, in);
+
+ std::stringstream stream;
+ stream << value_to_add;
+
+ encode(stream.str(), in);
+
+ return ioctx->exec(oid, "numops", "add", in, out);
+ }
+
+ int sub(librados::IoCtx *ioctx,
+ const std::string& oid,
+ const std::string& key,
+ double value_to_subtract)
+ {
+ return add(ioctx, oid, key, -value_to_subtract);
+ }
+
+ int mul(librados::IoCtx *ioctx,
+ const std::string& oid,
+ const std::string& key,
+ double value_to_multiply)
+ {
+ bufferlist in, out;
+ encode(key, in);
+
+ std::stringstream stream;
+ stream << value_to_multiply;
+
+ encode(stream.str(), in);
+
+ return ioctx->exec(oid, "numops", "mul", in, out);
+ }
+
+ int div(librados::IoCtx *ioctx,
+ const std::string& oid,
+ const std::string& key,
+ double value_to_divide)
+ {
+ if (value_to_divide == 0)
+ return -EINVAL;
+
+ return mul(ioctx, oid, key, 1 / value_to_divide);
+ }
+
+ } // namespace numops
+ } // namespace cls
+} // namespace rados
diff --git a/src/cls/numops/cls_numops_client.h b/src/cls/numops/cls_numops_client.h
new file mode 100644
index 00000000..0b0ccbe5
--- /dev/null
+++ b/src/cls/numops/cls_numops_client.h
@@ -0,0 +1,50 @@
+/*
+ * Ceph - scalable distributed file system
+ *
+ * Copyright (C) 2015 CERN
+ *
+ * Author: Joaquim Rocha <joaquim.rocha@cern.ch>
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ */
+
+#ifndef CEPH_LIBRBD_CLS_NUMOPS_CLIENT_H
+#define CEPH_LIBRBD_CLS_NUMOPS_CLIENT_H
+
+#include "include/rados/librados_fwd.hpp"
+#include <string>
+
+namespace rados {
+ namespace cls {
+ namespace numops {
+
+ extern int add(librados::IoCtx *ioctx,
+ const std::string& oid,
+ const std::string& key,
+ double value_to_add);
+
+ extern int sub(librados::IoCtx *ioctx,
+ const std::string& oid,
+ const std::string& key,
+ double value_to_subtract);
+
+ extern int mul(librados::IoCtx *ioctx,
+ const std::string& oid,
+ const std::string& key,
+ double value_to_multiply);
+
+ extern int div(librados::IoCtx *ioctx,
+ const std::string& oid,
+ const std::string& key,
+ double value_to_divide);
+
+ } // namespace numops
+ } // namespace cls
+} // namespace rados
+
+#endif // CEPH_LIBRBD_CLS_NUMOPS_CLIENT_H
+
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-30 01:59:08 +0000