1 files changed, 104 insertions, 0 deletions
diff --git a/src/mount/conf.cc b/src/mount/conf.cc
new file mode 100644
index 00000000..3acb426a
--- /dev/null
+++ b/src/mount/conf.cc
@@ -0,0 +1,104 @@
+// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
+// vim: ts=8 sw=2 smarttab
+
+#include <string>
+#include <vector>
+#include <cstring>
+#include <map>
+
+#include "common/ceph_context.h"
+#include "common/ceph_argparse.h"
+#include "global/global_init.h"
+#include "common/config.h"
+#include "auth/KeyRing.h"
+#include "mount.ceph.h"
+#include "mon/MonClient.h"
+
+extern "C" void mount_ceph_get_config_info(const char *config_file,
+					   const char *name,
+					   bool v2_addrs,
+					   struct ceph_config_info *cci)
+{
+  int err;
+  KeyRing keyring;
+  CryptoKey secret;
+  std::string secret_str;
+  std::string monaddrs;
+  vector<const char *> args = { "--name", name };
+  bool first = true;
+
+  if (config_file) {
+    args.push_back("--conf");
+    args.push_back(config_file);
+  }
+
+  /* Create CephContext */
+  auto cct = global_init(NULL, args, CEPH_ENTITY_TYPE_CLIENT,
+			 CODE_ENVIRONMENT_UTILITY,
+			 CINIT_FLAG_NO_DAEMON_ACTIONS|CINIT_FLAG_NO_MON_CONFIG);
+  auto& conf = cct->_conf;
+
+  conf.parse_env(cct->get_module_type()); // environment variables override
+  conf.apply_changes(nullptr);
+
+  MonClient monc = MonClient(cct.get());
+  err = monc.build_initial_monmap();
+  if (err)
+    goto scrape_keyring;
+
+  for (const auto& mon : monc.monmap.addr_mons) {
+    auto& eaddr = mon.first;
+
+    /*
+     * Filter v1 addrs if we're running in ms_mode=legacy. Filter
+     * v2 addrs for any other ms_mode.
+     */
+    if (v2_addrs) {
+      if (!eaddr.is_msgr2())
+	continue;
+    } else {
+      if (!eaddr.is_legacy())
+	continue;
+    }
+
+    std::string addr;
+    addr += eaddr.ip_only_to_str();
+    addr += ":";
+    addr += std::to_string(eaddr.get_port());
+    /* If this will overrun cci_mons, stop here */
+    if (monaddrs.length() + 1 + addr.length() + 1 > sizeof(cci->cci_mons))
+      break;
+
+    if (first)
+      first = false;
+    else
+      monaddrs += ",";
+
+    monaddrs += addr;
+  }
+
+  if (monaddrs.length())
+    strcpy(cci->cci_mons, monaddrs.c_str());
+  else
+    mount_ceph_debug("Could not discover monitor addresses");
+
+scrape_keyring:
+  err = keyring.from_ceph_context(cct.get());
+  if (err) {
+    mount_ceph_debug("keyring.from_ceph_context failed: %d\n", err);
+    return;
+  }
+
+  if (!keyring.get_secret(conf->name, secret)) {
+    mount_ceph_debug("keyring.get_secret failed\n");
+    return;
+  }
+
+  secret.encode_base64(secret_str);
+
+  if (secret_str.length() + 1 > sizeof(cci->cci_secret)) {
+    mount_ceph_debug("secret is too long\n");
+    return;
+  }
+  strcpy(cci->cci_secret, secret_str.c_str());
+}