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Diffstat (limited to 'src/mon/MonCap.h')
| -rw-r--r-- | src/mon/MonCap.h | 227 |
1 files changed, 227 insertions, 0 deletions
diff --git a/src/mon/MonCap.h b/src/mon/MonCap.h new file mode 100644 index 000000000..ab4e35bc9 --- /dev/null +++ b/src/mon/MonCap.h @@ -0,0 +1,227 @@ +// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*- +// vim: ts=8 sw=2 smarttab + +#ifndef CEPH_MONCAP_H +#define CEPH_MONCAP_H + +#include <ostream> + +#include "include/common_fwd.h" +#include "include/types.h" +#include "common/entity_name.h" +#include "mds/mdstypes.h" + +static const __u8 MON_CAP_R = (1 << 1); // read +static const __u8 MON_CAP_W = (1 << 2); // write +static const __u8 MON_CAP_X = (1 << 3); // execute +static const __u8 MON_CAP_ALL = MON_CAP_R | MON_CAP_W | MON_CAP_X; +static const __u8 MON_CAP_ANY = 0xff; // * + +struct mon_rwxa_t { + __u8 val; + + // cppcheck-suppress noExplicitConstructor + mon_rwxa_t(__u8 v = 0) : val(v) {} + mon_rwxa_t& operator=(__u8 v) { + val = v; + return *this; + } + operator __u8() const { + return val; + } +}; + +std::ostream& operator<<(std::ostream& out, const mon_rwxa_t& p); + +struct StringConstraint { + enum MatchType { + MATCH_TYPE_NONE, + MATCH_TYPE_EQUAL, + MATCH_TYPE_PREFIX, + MATCH_TYPE_REGEX + }; + + MatchType match_type = MATCH_TYPE_NONE; + std::string value; + + StringConstraint() {} + StringConstraint(MatchType match_type, std::string value) + : match_type(match_type), value(value) { + } +}; + +std::ostream& operator<<(std::ostream& out, const StringConstraint& c); + +struct MonCapGrant { + /* + * A grant can come in one of five forms: + * + * - a blanket allow ('allow rw', 'allow *') + * - this will match against any service and the read/write/exec flags + * in the mon code. semantics of what X means are somewhat ad hoc. + * + * - a service allow ('allow service mds rw') + * - this will match against a specific service and the r/w/x flags. + * + * - a profile ('allow profile osd') + * - this will match against specific monitor-enforced semantics of what + * this type of user should need to do. examples include 'osd', 'mds', + * 'bootstrap-osd'. + * + * - a command ('allow command foo', 'allow command bar with arg1=val1 arg2 prefix val2') + * this includes the command name (the prefix string), and a set + * of key/value pairs that constrain use of that command. if no pairs + * are specified, any arguments are allowed; if a pair is specified, that + * argument must be present and equal or match a prefix. + * + * - an fs name ('allow fsname foo') + * - this will restrict access to MDSMaps in the FSMap to the provided + * fs name. + */ + std::string service; + std::string profile; + std::string command; + std::map<std::string, StringConstraint> command_args; + std::string fs_name; + + // restrict by network + std::string network; + + // these are filled in by parse_network(), called by MonCap::parse() + entity_addr_t network_parsed; + unsigned network_prefix = 0; + bool network_valid = true; + + void parse_network(); + + mon_rwxa_t allow; + + // explicit grants that a profile grant expands to; populated as + // needed by expand_profile() (via is_match()) and cached here. + mutable std::list<MonCapGrant> profile_grants; + + void expand_profile(const EntityName& name) const; + + MonCapGrant() : allow(0) {} + // cppcheck-suppress noExplicitConstructor + MonCapGrant(mon_rwxa_t a) : allow(a) {} + MonCapGrant(std::string s, mon_rwxa_t a) : service(std::move(s)), allow(a) {} + // cppcheck-suppress noExplicitConstructor + MonCapGrant(std::string c) : command(std::move(c)) {} + MonCapGrant(std::string c, std::string a, StringConstraint co) : command(std::move(c)) { + command_args[a] = co; + } + MonCapGrant(mon_rwxa_t a, std::string fsname) : fs_name(fsname), allow(a) {} + + /** + * check if given request parameters match our constraints + * + * @param cct context + * @param name entity name + * @param service service (if any) + * @param command command (if any) + * @param command_args command args (if any) + * @return bits we allow + */ + mon_rwxa_t get_allowed(CephContext *cct, + EntityName name, + const std::string& service, + const std::string& command, + const std::map<std::string, std::string>& command_args) const; + + bool is_allow_all() const { + return + allow == MON_CAP_ANY && + service.length() == 0 && + profile.length() == 0 && + command.length() == 0 && + fs_name.empty(); + } +}; + +std::ostream& operator<<(std::ostream& out, const MonCapGrant& g); + +struct MonCap { + std::string text; + std::vector<MonCapGrant> grants; + + MonCap() {} + explicit MonCap(const std::vector<MonCapGrant> &g) : grants(g) {} + + std::string get_str() const { + return text; + } + + bool is_allow_all() const; + void set_allow_all(); + bool parse(const std::string& str, std::ostream *err=NULL); + + /** + * check if we are capable of something + * + * This method actually checks a description of a particular operation against + * what the capability has specified. + * + * @param service service name + * @param command command id + * @param command_args + * @param op_may_read whether the operation may need to read + * @param op_may_write whether the operation may need to write + * @param op_may_exec whether the operation may exec + * @return true if the operation is allowed, false otherwise + */ + bool is_capable(CephContext *cct, + EntityName name, + const std::string& service, + const std::string& command, + const std::map<std::string, std::string>& command_args, + bool op_may_read, bool op_may_write, bool op_may_exec, + const entity_addr_t& addr) const; + + void encode(ceph::buffer::list& bl) const; + void decode(ceph::buffer::list::const_iterator& bl); + void dump(ceph::Formatter *f) const; + static void generate_test_instances(std::list<MonCap*>& ls); + + std::vector<string> allowed_fs_names() const { + std::vector<string> ret; + for (auto& g : grants) { + if (not g.fs_name.empty()) { + ret.push_back(g.fs_name); + } else { + return {}; + } + } + return ret; + } + + bool fs_name_capable(const EntityName& ename, string_view fs_name, + __u8 mask) { + for (auto& g : grants) { + if (g.is_allow_all()) { + return true; + } + + if ((g.fs_name.empty() || g.fs_name == fs_name) && (mask & g.allow)) { + return true; + } + + g.expand_profile(ename); + for (auto& pg : g.profile_grants) { + if ((pg.service == "fs" || pg.service == "mds") && + (pg.fs_name.empty() || pg.fs_name == fs_name) && + (pg.allow & mask)) { + return true; + } + } + } + + return false; + } + +}; +WRITE_CLASS_ENCODER(MonCap) + +std::ostream& operator<<(std::ostream& out, const MonCap& cap); + +#endif |