Adding upstream version 16.2.11+ds.upstream/16.2.11+dsupstream

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

1 files changed, 233 insertions, 0 deletions

diff --git a/src/librbd/api/Config.cc b/src/librbd/api/Config.cc
new file mode 100644
index 000000000..8148607e3
--- /dev/null
+++ b/src/librbd/api/Config.cc
@@ -0,0 +1,233 @@
+// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
+// vim: ts=8 sw=2 smarttab
+
+#include "librbd/api/Config.h"
+#include "common/dout.h"
+#include "common/errno.h"
+#include "common/Cond.h"
+#include "librbd/ImageCtx.h"
+#include "librbd/Utils.h"
+#include "librbd/api/PoolMetadata.h"
+#include "librbd/image/GetMetadataRequest.h"
+#include <algorithm>
+#include <boost/algorithm/string/predicate.hpp>
+
+#define dout_subsys ceph_subsys_rbd
+#undef dout_prefix
+#define dout_prefix *_dout << "librbd::Config: " << __func__ << ": "
+
+namespace librbd {
+namespace api {
+
+namespace {
+
+const uint32_t MAX_KEYS = 64;
+
+typedef std::map<std::string_view, std::pair<std::string, config_source_t>> Parent;
+
+static std::set<std::string_view> EXCLUDE_OPTIONS {
+    "rbd_auto_exclusive_lock_until_manual_request",
+    "rbd_default_format",
+    "rbd_default_pool",
+    "rbd_discard_on_zeroed_write_same",
+    "rbd_op_thread_timeout",
+    "rbd_op_threads",
+    "rbd_tracing",
+    "rbd_validate_names",
+    "rbd_validate_pool",
+    "rbd_mirror_pool_replayers_refresh_interval",
+    "rbd_config_pool_override_update_timestamp"
+  };
+static std::set<std::string_view> EXCLUDE_IMAGE_OPTIONS {
+    "rbd_default_clone_format",
+    "rbd_default_data_pool",
+    "rbd_default_features",
+    "rbd_default_format",
+    "rbd_default_order",
+    "rbd_default_stripe_count",
+    "rbd_default_stripe_unit",
+    "rbd_journal_order",
+    "rbd_journal_pool",
+    "rbd_journal_splay_width"
+  };
+
+struct Options : Parent {
+  librados::IoCtx m_io_ctx;
+
+  Options(librados::IoCtx& io_ctx, bool image_apply_only_options) {
+    m_io_ctx.dup(io_ctx);
+    m_io_ctx.set_namespace("");
+
+    CephContext *cct = reinterpret_cast<CephContext *>(m_io_ctx.cct());
+
+    const std::string rbd_key_prefix("rbd_");
+    const std::string rbd_mirror_key_prefix("rbd_mirror_");
+    auto& schema = cct->_conf.get_schema();
+    for (auto& pair : schema) {
+      if (!boost::starts_with(pair.first, rbd_key_prefix)) {
+        continue;
+      } else if (EXCLUDE_OPTIONS.count(pair.first) != 0) {
+        continue;
+      } else if (image_apply_only_options &&
+                 EXCLUDE_IMAGE_OPTIONS.count(pair.first) != 0) {
+        continue;
+      } else if (image_apply_only_options &&
+                 boost::starts_with(pair.first, rbd_mirror_key_prefix)) {
+        continue;
+      }
+
+      insert({pair.first, {}});
+    }
+  }
+
+  int init() {
+    CephContext *cct = (CephContext *)m_io_ctx.cct();
+
+    for (auto& [k,v] : *this) {
+      int r = cct->_conf.get_val(k, &v.first);
+      ceph_assert(r == 0);
+      v.second = RBD_CONFIG_SOURCE_CONFIG;
+    }
+
+    std::string last_key = ImageCtx::METADATA_CONF_PREFIX;
+    bool more_results = true;
+
+    while (more_results) {
+      std::map<std::string, bufferlist> pairs;
+
+      int r = librbd::api::PoolMetadata<>::list(m_io_ctx, last_key, MAX_KEYS,
+                                                &pairs);
+      if (r < 0) {
+        return r;
+      }
+
+      if (pairs.empty()) {
+        break;
+      }
+
+      more_results = (pairs.size() == MAX_KEYS);
+      last_key = pairs.rbegin()->first;
+
+      for (auto kv : pairs) {
+        std::string key;
+        if (!util::is_metadata_config_override(kv.first, &key)) {
+          more_results = false;
+          break;
+        }
+        auto it = find(key);
+        if (it != end()) {
+          it->second = {{kv.second.c_str(), kv.second.length()},
+                        RBD_CONFIG_SOURCE_POOL};
+        }
+      }
+    }
+    return 0;
+  }
+};
+
+} // anonymous namespace
+
+template <typename I>
+bool Config<I>::is_option_name(librados::IoCtx& io_ctx,
+                               const std::string &name) {
+  Options opts(io_ctx, false);
+
+  return (opts.find(name) != opts.end());
+}
+
+template <typename I>
+int Config<I>::list(librados::IoCtx& io_ctx,
+                    std::vector<config_option_t> *options) {
+  Options opts(io_ctx, false);
+
+  int r = opts.init();
+  if (r < 0) {
+    return r;
+  }
+
+  for (auto& [k,v] : opts) {
+    options->push_back({std::string{k}, v.first, v.second});
+  }
+
+  return 0;
+}
+
+template <typename I>
+bool Config<I>::is_option_name(I *image_ctx, const std::string &name) {
+  Options opts(image_ctx->md_ctx, true);
+
+  return (opts.find(name) != opts.end());
+}
+
+template <typename I>
+int Config<I>::list(I *image_ctx, std::vector<config_option_t> *options) {
+  CephContext *cct = image_ctx->cct;
+  Options opts(image_ctx->md_ctx, true);
+
+  int r = opts.init();
+  if (r < 0) {
+    return r;
+  }
+
+  std::map<std::string, bufferlist> pairs;
+  C_SaferCond ctx;
+  auto req = image::GetMetadataRequest<I>::create(
+    image_ctx->md_ctx, image_ctx->header_oid, true,
+    ImageCtx::METADATA_CONF_PREFIX, ImageCtx::METADATA_CONF_PREFIX, 0U, &pairs,
+    &ctx);
+  req->send();
+
+  r = ctx.wait();
+  if (r < 0) {
+    lderr(cct) << "failed reading image metadata: " << cpp_strerror(r)
+               << dendl;
+    return r;
+  }
+
+  for (auto kv : pairs) {
+    std::string key;
+    if (!util::is_metadata_config_override(kv.first, &key)) {
+      break;
+    }
+    auto it = opts.find(key);
+    if (it != opts.end()) {
+      it->second = {{kv.second.c_str(), kv.second.length()},
+                    RBD_CONFIG_SOURCE_IMAGE};
+    }
+  }
+
+  for (auto& [k,v] : opts) {
+    options->push_back({std::string{k}, v.first, v.second});
+  }
+
+  return 0;
+}
+
+template <typename I>
+void Config<I>::apply_pool_overrides(librados::IoCtx& io_ctx,
+                                     ConfigProxy* config) {
+  CephContext *cct = reinterpret_cast<CephContext *>(io_ctx.cct());
+
+  Options opts(io_ctx, false);
+  int r = opts.init();
+  if (r < 0) {
+    lderr(cct) << "failed to read pool config overrides: " << cpp_strerror(r)
+               << dendl;
+    return;
+  }
+
+  for (auto& [k,v] : opts) {
+    if (v.second == RBD_CONFIG_SOURCE_POOL) {
+      r = config->set_val(k, v.first);
+      if (r < 0) {
+        lderr(cct) << "failed to override pool config " << k << "="
+                   << v.first << ": " << cpp_strerror(r) << dendl;
+      }
+    }
+  }
+}
+
+} // namespace api
+} // namespace librbd
+
+template class librbd::api::Config<librbd::ImageCtx>;