    /*
     *  This file contains the flask_op hypercall commands and definitions.
     *
     *  Author:  George Coker, <gscoker@alpha.ncsc.mil>
     *
     * Permission is hereby granted, free of charge, to any person obtaining a copy
     * of this software and associated documentation files (the "Software"), to
     * deal in the Software without restriction, including without limitation the
     * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
     * sell copies of the Software, and to permit persons to whom the Software is
     * furnished to do so, subject to the following conditions:
     *
     * The above copyright notice and this permission notice shall be included in
     * all copies or substantial portions of the Software.
     *
     * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
     * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
     * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
     * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
     * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
     * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
     * DEALINGS IN THE SOFTWARE.
     */

    #ifndef __FLASK_OP_H__
    #define __FLASK_OP_H__

    #include "../event_channel.h"

    #define XEN_FLASK_INTERFACE_VERSION 1

    struct xen_flask_load {
        XEN_GUEST_HANDLE(char) buffer;
        uint32_t size;
    };

    struct xen_flask_setenforce {
        uint32_t enforcing;
    };

    struct xen_flask_sid_context {
        /* IN/OUT: sid to convert to/from string */
        uint32_t sid;
        /* IN: size of the context buffer
         * OUT: actual size of the output context string
         */
        uint32_t size;
        XEN_GUEST_HANDLE(char) context;
    };

    struct xen_flask_access {
        /* IN: access request */
        uint32_t ssid;
        uint32_t tsid;
        uint32_t tclass;
        uint32_t req;
        /* OUT: AVC data */
        uint32_t allowed;
        uint32_t audit_allow;
        uint32_t audit_deny;
        uint32_t seqno;
    };

    struct xen_flask_transition {
        /* IN: transition SIDs and class */
        uint32_t ssid;
        uint32_t tsid;
        uint32_t tclass;
        /* OUT: new SID */
        uint32_t newsid;
    };

    #if __XEN_INTERFACE_VERSION__ < 0x00040800
    struct xen_flask_userlist {
        /* IN: starting SID for list */
        uint32_t start_sid;
        /* IN: size of user string and output buffer
         * OUT: number of SIDs returned */
        uint32_t size;
        union {
            /* IN: user to enumerate SIDs */
            XEN_GUEST_HANDLE(char) user;
            /* OUT: SID list */
            XEN_GUEST_HANDLE(uint32) sids;
        } u;
    };
    #endif

    struct xen_flask_boolean {
        /* IN/OUT: numeric identifier for boolean [GET/SET]
         * If -1, name will be used and bool_id will be filled in. */
        uint32_t bool_id;
        /* OUT: current enforcing value of boolean [GET/SET] */
        uint8_t enforcing;
        /* OUT: pending value of boolean [GET/SET] */
        uint8_t pending;
        /* IN: new value of boolean [SET] */
        uint8_t new_value;
        /* IN: commit new value instead of only setting pending [SET] */
        uint8_t commit;
        /* IN: size of boolean name buffer [GET/SET]
         * OUT: actual size of name [GET only] */
        uint32_t size;
        /* IN: if bool_id is -1, used to find boolean [GET/SET]
         * OUT: textual name of boolean [GET only]
         */
        XEN_GUEST_HANDLE(char) name;
    };

    struct xen_flask_setavc_threshold {
        /* IN */
        uint32_t threshold;
    };

    struct xen_flask_hash_stats {
        /* OUT */
        uint32_t entries;
        uint32_t buckets_used;
        uint32_t buckets_total;
        uint32_t max_chain_len;
    };

    struct xen_flask_cache_stats {
        /* IN */
        uint32_t cpu;
        /* OUT */
        uint32_t lookups;
        uint32_t hits;
        uint32_t misses;
        uint32_t allocations;
        uint32_t reclaims;
        uint32_t frees;
    };

    struct xen_flask_ocontext {
        /* IN */
        uint32_t ocon;
        uint32_t sid;
        uint64_t low, high;
    };

    struct xen_flask_peersid {
        /* IN */
        evtchn_port_t evtchn;
        /* OUT */
        uint32_t sid;
    };

    struct xen_flask_relabel {
        /* IN */
        uint32_t domid;
        uint32_t sid;
    };

    struct xen_flask_devicetree_label {
        /* IN */
        uint32_t sid;
        uint32_t length;
        XEN_GUEST_HANDLE(char) path;
    };

    struct xen_flask_op {
        uint32_t cmd;
    #define FLASK_LOAD              1
    #define FLASK_GETENFORCE        2
    #define FLASK_SETENFORCE        3
    #define FLASK_CONTEXT_TO_SID    4
    #define FLASK_SID_TO_CONTEXT    5
    #define FLASK_ACCESS            6
    #define FLASK_CREATE            7
    #define FLASK_RELABEL           8
    #define FLASK_USER              9  /* No longer implemented */
    #define FLASK_POLICYVERS        10
    #define FLASK_GETBOOL           11
    #define FLASK_SETBOOL           12
    #define FLASK_COMMITBOOLS       13
    #define FLASK_MLS               14
    #define FLASK_DISABLE           15
    #define FLASK_GETAVC_THRESHOLD  16
    #define FLASK_SETAVC_THRESHOLD  17
    #define FLASK_AVC_HASHSTATS     18
    #define FLASK_AVC_CACHESTATS    19
    #define FLASK_MEMBER            20
    #define FLASK_ADD_OCONTEXT      21
    #define FLASK_DEL_OCONTEXT      22
    #define FLASK_GET_PEER_SID      23
    #define FLASK_RELABEL_DOMAIN    24
    #define FLASK_DEVICETREE_LABEL  25
        uint32_t interface_version; /* XEN_FLASK_INTERFACE_VERSION */
        union {
            struct xen_flask_load load;
            struct xen_flask_setenforce enforce;
            /* FLASK_CONTEXT_TO_SID and FLASK_SID_TO_CONTEXT */
            struct xen_flask_sid_context sid_context;
            struct xen_flask_access access;
            /* FLASK_CREATE, FLASK_RELABEL, FLASK_MEMBER */
            struct xen_flask_transition transition;
    #if __XEN_INTERFACE_VERSION__ < 0x00040800
            struct xen_flask_userlist userlist;
    #endif
            /* FLASK_GETBOOL, FLASK_SETBOOL */
            struct xen_flask_boolean boolean;
            struct xen_flask_setavc_threshold setavc_threshold;
            struct xen_flask_hash_stats hash_stats;
            struct xen_flask_cache_stats cache_stats;
            /* FLASK_ADD_OCONTEXT, FLASK_DEL_OCONTEXT */
            struct xen_flask_ocontext ocontext;
            struct xen_flask_peersid peersid;
            struct xen_flask_relabel relabel;
            struct xen_flask_devicetree_label devicetree_label;
        } u;
    };
    typedef struct xen_flask_op xen_flask_op_t;
    DEFINE_XEN_GUEST_HANDLE(xen_flask_op_t);

    #endif