X-Git-Url: https://gerrit.opnfv.org/gerrit/gitweb?a=blobdiff_plain;f=src%2Fceph%2Fsrc%2Fosd%2FOSDCap.cc;fp=src%2Fceph%2Fsrc%2Fosd%2FOSDCap.cc;h=c3aa6b6caa3a52b0d8081615e950b924fd6a7ff2;hb=812ff6ca9fcd3e629e49d4328905f33eee8ca3f5;hp=0000000000000000000000000000000000000000;hpb=15280273faafb77777eab341909a3f495cf248d9;p=stor4nfv.git

diff --git a/src/ceph/src/osd/OSDCap.cc b/src/ceph/src/osd/OSDCap.cc
new file mode 100644
index 0000000..c3aa6b6
--- /dev/null
+++ b/src/ceph/src/osd/OSDCap.cc
@@ -0,0 +1,420 @@
+// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
+// vim: ts=8 sw=2 smarttab
+/*
+ * Ceph - scalable distributed file system
+ *
+ * Copyright (C) 2009-2011 New Dream Network
+ *
+ * This is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License version 2.1, as published by the Free Software
+ * Foundation.  See file COPYING.
+ *
+ */
+
+#include <boost/config/warning_disable.hpp>
+#include <boost/spirit/include/qi.hpp>
+#include <boost/spirit/include/phoenix_operator.hpp>
+#include <boost/spirit/include/phoenix.hpp>
+
+#include "OSDCap.h"
+#include "common/config.h"
+#include "common/debug.h"
+
+using std::ostream;
+using std::vector;
+
+ostream& operator<<(ostream& out, const osd_rwxa_t& p)
+{
+  if (p == OSD_CAP_ANY)
+    return out << "*";
+
+  if (p & OSD_CAP_R)
+    out << "r";
+  if (p & OSD_CAP_W)
+    out << "w";
+  if ((p & OSD_CAP_X) == OSD_CAP_X) {
+    out << "x";
+  } else {
+    if (p & OSD_CAP_CLS_R)
+      out << " class-read";
+    if (p & OSD_CAP_CLS_W)
+      out << " class-write";
+  }
+  return out;
+}
+
+ostream& operator<<(ostream& out, const OSDCapSpec& s)
+{
+  if (s.allow)
+    return out << s.allow;
+  if (s.class_name.length())
+    return out << "class '" << s.class_name << "' '" << s.class_allow << "'";
+  return out;
+}
+
+ostream& operator<<(ostream& out, const OSDCapPoolNamespace& pns)
+{
+  if (!pns.pool_name.empty()) {
+    out << "pool " << pns.pool_name << " ";
+  }
+  if (pns.nspace) {
+    out << "namespace ";
+    if (pns.nspace->empty()) {
+      out << "\"\"";
+    } else {
+      out << *pns.nspace;
+    }
+    out << " ";
+  }
+  return out;
+}
+
+ostream& operator<<(ostream& out, const OSDCapMatch& m)
+{
+  if (m.auid != -1LL) {
+    out << "auid " << m.auid << " ";
+  } else {
+    out << m.pool_namespace;
+  }
+
+  if (m.object_prefix.length()) {
+    out << "object_prefix " << m.object_prefix << " ";
+  }
+  return out;
+}
+
+ostream& operator<<(ostream& out, const OSDCapProfile& m)
+{
+  out << "profile " << m.name;
+  out << m.pool_namespace;
+  return out;
+}
+
+bool OSDCapPoolNamespace::is_match(const std::string& pn,
+                                   const std::string& ns) const
+{
+  if (!pool_name.empty()) {
+    if (pool_name != pn) {
+      return false;
+    }
+  }
+  if (nspace) {
+    if (*nspace != ns) {
+      return false;
+    }
+  }
+  return true;
+}
+
+bool OSDCapPoolNamespace::is_match_all() const
+{
+  if (!pool_name.empty())
+    return false;
+  if (nspace)
+    return false;
+  return true;
+}
+
+bool OSDCapMatch::is_match(const string& pn, const string& ns,
+                           int64_t pool_auid, const string& object) const
+{
+  if (auid >= 0) {
+    if (auid != pool_auid)
+      return false;
+  } else if (!pool_namespace.is_match(pn, ns)) {
+    return false;
+  }
+
+  if (object_prefix.length()) {
+    if (object.find(object_prefix) != 0)
+      return false;
+  }
+  return true;
+}
+
+bool OSDCapMatch::is_match_all() const
+{
+  if (auid >= 0) {
+    return false;
+  } else if (!pool_namespace.is_match_all()) {
+    return false;
+  }
+
+  if (object_prefix.length()) {
+    return false;
+  }
+  return true;
+}
+
+ostream& operator<<(ostream& out, const OSDCapGrant& g)
+{
+  out << "grant(";
+  if (g.profile.is_valid()) {
+    out << g.profile << " [";
+    for (auto it = g.profile_grants.cbegin();
+         it != g.profile_grants.cend(); ++it) {
+      if (it != g.profile_grants.cbegin()) {
+        out << ",";
+      }
+      out << *it;
+    }
+    out << "]";
+  } else {
+    out << g.match << g.spec;
+  }
+  out << ")";
+  return out;
+}
+
+bool OSDCapGrant::allow_all() const
+{
+  if (profile.is_valid()) {
+    return std::any_of(profile_grants.cbegin(), profile_grants.cend(),
+                       [](const OSDCapGrant& grant) {
+        return grant.allow_all();
+      });
+  }
+
+  return (match.is_match_all() && spec.allow_all());
+}
+
+bool OSDCapGrant::is_capable(const string& pool_name, const string& ns,
+                             int64_t pool_auid, const string& object,
+                             bool op_may_read, bool op_may_write,
+                             const std::vector<OpRequest::ClassInfo>& classes,
+                             std::vector<bool>* class_allowed) const
+{
+  osd_rwxa_t allow = 0;
+  if (profile.is_valid()) {
+    return std::any_of(profile_grants.cbegin(), profile_grants.cend(),
+                       [&](const OSDCapGrant& grant) {
+        return grant.is_capable(pool_name, ns, pool_auid, object, op_may_read,
+                                op_may_write, classes, class_allowed);
+      });
+  } else {
+    if (match.is_match(pool_name, ns, pool_auid, object)) {
+      allow = allow | spec.allow;
+      if ((op_may_read && !(allow & OSD_CAP_R)) ||
+          (op_may_write && !(allow & OSD_CAP_W))) {
+        return false;
+      }
+      if (!classes.empty()) {
+        // check 'allow *'
+        if (spec.allow_all()) {
+          return true;
+        }
+
+        // compare this grant to each class in the operation
+        for (size_t i = 0; i < classes.size(); ++i) {
+          // check 'allow class foo'
+          if (!spec.class_name.empty() && classes[i].name == spec.class_name) {
+            (*class_allowed)[i] = true;
+            continue;
+          }
+          // check 'allow x | class-{rw}': must be on whitelist
+          if (!classes[i].whitelisted) {
+            continue;
+          }
+          if ((classes[i].read && !(allow & OSD_CAP_CLS_R)) ||
+              (classes[i].write && !(allow & OSD_CAP_CLS_W))) {
+            continue;
+          }
+          (*class_allowed)[i] = true;
+        }
+        if (!std::all_of(class_allowed->cbegin(), class_allowed->cend(),
+              [](bool v) { return v; })) {
+          return false;
+        }
+      }
+      return true;
+    }
+  }
+  return false;
+}
+
+void OSDCapGrant::expand_profile()
+{
+  if (profile.name == "read-only") {
+    // grants READ-ONLY caps to the OSD
+    profile_grants.emplace_back(OSDCapMatch(profile.pool_namespace),
+                                OSDCapSpec(osd_rwxa_t(OSD_CAP_R)));
+    return;
+  }
+  if (profile.name == "read-write") {
+    // grants READ-WRITE caps to the OSD
+    profile_grants.emplace_back(OSDCapMatch(profile.pool_namespace),
+                                OSDCapSpec(osd_rwxa_t(OSD_CAP_R | OSD_CAP_W)));
+  }
+
+  if (profile.name == "rbd") {
+    // RBD read-write grant
+    profile_grants.emplace_back(OSDCapMatch("", "", "rbd_children"),
+                                OSDCapSpec(osd_rwxa_t(OSD_CAP_CLS_R)));
+    profile_grants.emplace_back(OSDCapMatch("", "", "rbd_mirroring"),
+                                OSDCapSpec(osd_rwxa_t(OSD_CAP_CLS_R)));
+    profile_grants.emplace_back(OSDCapMatch(profile.pool_namespace),
+                                OSDCapSpec(osd_rwxa_t(OSD_CAP_R |
+                                                      OSD_CAP_W |
+                                                      OSD_CAP_X)));
+  }
+  if (profile.name == "rbd-read-only") {
+    // RBD read-only grant
+    profile_grants.emplace_back(OSDCapMatch(profile.pool_namespace),
+                                OSDCapSpec(osd_rwxa_t(OSD_CAP_R |
+                                                      OSD_CAP_CLS_R)));
+  }
+}
+
+bool OSDCap::allow_all() const
+{
+  for (auto &grant : grants) {
+    if (grant.allow_all()) {
+      return true;
+    }
+  }
+  return false;
+}
+
+void OSDCap::set_allow_all()
+{
+  grants.clear();
+  grants.push_back(OSDCapGrant(OSDCapMatch(), OSDCapSpec(OSD_CAP_ANY)));
+}
+
+bool OSDCap::is_capable(const string& pool_name, const string& ns,
+                        int64_t pool_auid, const string& object,
+                        bool op_may_read, bool op_may_write,
+			const std::vector<OpRequest::ClassInfo>& classes) const
+{
+  std::vector<bool> class_allowed(classes.size(), false);
+  for (auto &grant : grants) {
+    if (grant.is_capable(pool_name, ns, pool_auid, object, op_may_read,
+                         op_may_write, classes, &class_allowed)) {
+      return true;
+    }
+  }
+  return false;
+}
+
+
+// grammar
+namespace qi = boost::spirit::qi;
+namespace ascii = boost::spirit::ascii;
+namespace phoenix = boost::phoenix;
+
+template <typename Iterator>
+struct OSDCapParser : qi::grammar<Iterator, OSDCap()>
+{
+  OSDCapParser() : OSDCapParser::base_type(osdcap)
+  {
+    using qi::char_;
+    using qi::int_;
+    using qi::lexeme;
+    using qi::alnum;
+    using qi::_val;
+    using qi::_1;
+    using qi::_2;
+    using qi::_3;
+    using qi::eps;
+    using qi::lit;
+
+    quoted_string %=
+      lexeme['"' >> +(char_ - '"') >> '"'] | 
+      lexeme['\'' >> +(char_ - '\'') >> '\''];
+    equoted_string %=
+      lexeme['"' >> *(char_ - '"') >> '"'] |
+      lexeme['\'' >> *(char_ - '\'') >> '\''];
+    unquoted_word %= +char_("a-zA-Z0-9_.-");
+    str %= quoted_string | unquoted_word;
+    estr %= equoted_string | unquoted_word;
+
+    spaces = +ascii::space;
+
+    pool_name %= -(spaces >> lit("pool") >> (lit('=') | spaces) >> str);
+    nspace %= (spaces >> lit("namespace") >> (lit('=') | spaces) >> estr);
+
+    // match := [pool[=]<poolname> [namespace[=]<namespace>] | auid <123>] [object_prefix <prefix>]
+    auid %= (spaces >> lit("auid") >> spaces >> int_);
+    object_prefix %= -(spaces >> lit("object_prefix") >> spaces >> str);
+
+    match = (
+      (auid >> object_prefix)                 [_val = phoenix::construct<OSDCapMatch>(_1, _2)] |
+      (pool_name >> nspace >> object_prefix)  [_val = phoenix::construct<OSDCapMatch>(_1, _2, _3)] |
+      (pool_name >> object_prefix)            [_val = phoenix::construct<OSDCapMatch>(_1, _2)]);
+
+    // rwxa := * | [r][w][x] [class-read] [class-write]
+    rwxa =
+      (spaces >> lit("*")[_val = OSD_CAP_ANY]) |
+      ( eps[_val = 0] >>
+	(
+	 spaces >>
+	 ( lit('r')[_val |= OSD_CAP_R] ||
+	   lit('w')[_val |= OSD_CAP_W] ||
+	   lit('x')[_val |= OSD_CAP_X] )) ||
+	( (spaces >> lit("class-read")[_val |= OSD_CAP_CLS_R]) ||
+	  (spaces >> lit("class-write")[_val |= OSD_CAP_CLS_W]) ));
+
+    // capspec := * | rwx | class <name> [classcap]
+    class_name %= (spaces >> lit("class") >> spaces >> str);
+    class_cap %= -(spaces >> str);
+    capspec = (
+      (rwxa)                    [_val = phoenix::construct<OSDCapSpec>(_1)] |
+      (class_name >> class_cap) [_val = phoenix::construct<OSDCapSpec>(_1, _2)]);
+
+    // profile := profile <name> [pool[=]<pool> [namespace[=]<namespace>]]
+    profile_name %= (lit("profile") >> (lit('=') | spaces) >> str);
+    profile = (
+      (profile_name >> pool_name >> nspace) [_val = phoenix::construct<OSDCapProfile>(_1, _2, _3)] |
+      (profile_name >> pool_name)           [_val = phoenix::construct<OSDCapProfile>(_1, _2)]);
+
+    // grant := allow match capspec
+    grant = (*ascii::blank >>
+	     ((lit("allow") >> capspec >> match)  [_val = phoenix::construct<OSDCapGrant>(_2, _1)] |
+	      (lit("allow") >> match >> capspec)  [_val = phoenix::construct<OSDCapGrant>(_1, _2)] |
+              (profile)                           [_val = phoenix::construct<OSDCapGrant>(_1)]
+             ) >> *ascii::blank);
+    // osdcap := grant [grant ...]
+    grants %= (grant % (lit(';') | lit(',')));
+    osdcap = grants  [_val = phoenix::construct<OSDCap>(_1)];
+  }
+  qi::rule<Iterator> spaces;
+  qi::rule<Iterator, unsigned()> rwxa;
+  qi::rule<Iterator, string()> quoted_string, equoted_string;
+  qi::rule<Iterator, string()> unquoted_word;
+  qi::rule<Iterator, string()> str, estr;
+  qi::rule<Iterator, int()> auid;
+  qi::rule<Iterator, string()> class_name;
+  qi::rule<Iterator, string()> class_cap;
+  qi::rule<Iterator, OSDCapSpec()> capspec;
+  qi::rule<Iterator, string()> pool_name;
+  qi::rule<Iterator, string()> nspace;
+  qi::rule<Iterator, string()> object_prefix;
+  qi::rule<Iterator, OSDCapMatch()> match;
+  qi::rule<Iterator, string()> profile_name;
+  qi::rule<Iterator, OSDCapProfile()> profile;
+  qi::rule<Iterator, OSDCapGrant()> grant;
+  qi::rule<Iterator, std::vector<OSDCapGrant>()> grants;
+  qi::rule<Iterator, OSDCap()> osdcap;
+};
+
+bool OSDCap::parse(const string& str, ostream *err)
+{
+  OSDCapParser<string::const_iterator> g;
+  string::const_iterator iter = str.begin();
+  string::const_iterator end = str.end();
+
+  bool r = qi::phrase_parse(iter, end, g, ascii::space, *this);
+  if (r && iter == end)
+    return true;
+
+  // Make sure no grants are kept after parsing failed!
+  grants.clear();
+
+  if (err)
+    *err << "osdcap parse failed, stopped at '" << std::string(iter, end)
+	 << "' of '" << str << "'\n";
+
+  return false; 
+}
+