bsd/sys/proc_uuid_policy.h

   1 /*
   2  * Copyright (c) 2013 Apple Inc. All rights reserved.
   3  *
   4  * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
   5  *
   6  * This file contains Original Code and/or Modifications of Original Code
   7  * as defined in and that are subject to the Apple Public Source License
   8  * Version 2.0 (the 'License'). You may not use this file except in
   9  * compliance with the License. The rights granted to you under the License
  10  * may not be used to create, or enable the creation or redistribution of,
  11  * unlawful or unlicensed copies of an Apple operating system, or to
  12  * circumvent, violate, or enable the circumvention or violation of, any
  13  * terms of an Apple operating system software license agreement.
  14  *
  15  * Please obtain a copy of the License at
  16  * http://www.opensource.apple.com/apsl/ and read it before using this file.
  17  *
  18  * The Original Code and all software distributed under the License are
  19  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  20  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  21  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  22  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  23  * Please see the License for the specific language governing rights and
  24  * limitations under the License.
  25  *
  26  * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
  27  */
  28
  29 #ifndef _SYS_PROC_UUID_POLICY_H
  30 #define _SYS_PROC_UUID_POLICY_H
  31
  32 #include <sys/cdefs.h>
  33 #include <sys/param.h>
  34 #include <sys/types.h>
  35 #include <stdint.h>
  36 #include <uuid/uuid.h>
  37
  38 __BEGIN_DECLS
  39
  40 /*
  41  * The proc_uuid_policy subsystem allows a privileged client to
  42  * upload policies to the kernel keyed by Mach-O executable
  43  * UUID. In-kernel clients can query this policy table cheaply
  44  * to determine if a resource or process should by governed
  45  * by the policy flags. During early boot, the policy table
  46  * may be empty or sparse, which in-kernel clients should
  47  * have a specified behavior for.
  48  */
  49
  50 #define PROC_UUID_POLICY_OPERATION_CLEAR        0x00000000
  51 #define PROC_UUID_POLICY_OPERATION_ADD          0x00000001
  52 #define PROC_UUID_POLICY_OPERATION_REMOVE       0x00000002
  53
  54 /* The namespace of flags are managed by in-kernel clients */
  55 #define PROC_UUID_POLICY_FLAGS_NONE                     0x00000000
  56 #define PROC_UUID_NO_CELLULAR                           0x00000001
  57 #define PROC_UUID_NECP_APP_POLICY                       0x00000002
  58 #define PROC_UUID_ALT_DYLD_POLICY                       0x00000004
  59
  60 /* To be removed, replaced by PROC_UUID_NECP_APP_POLICY */
  61 #define PROC_UUID_FLOW_DIVERT                           0x00000002
  62
  63 #ifdef BSD_KERNEL_PRIVATE
  64 /*
  65  * Look up a policy indexed by UUID.
  66  *
  67  * Paramaters:
  68  *     uuid          UUID to look up, must be not the zero-uuid
  69  *     flags         Flags that have been associated with the UUID on successful
  70  *                   lookup.
  71  *     gencount      The generation count of the internal policy table representation.
  72  *
  73  *     Initial lookups by an in-kernel subsystem should pass 0 for flags/gencount.
  74  *     Subsequent lookups for the same UUID with the same flags and gencount passed
  75  *     in can short-circuit the lookup if the generation count has not changed.
  76  *
  77  * Return:
  78  *     0        Success, UUID was found, flags and gencount are returned
  79  *     EINVAL   Bad UUID or other pointer parameter
  80  *     ENOENT   UUID not found
  81  *
  82  */
  83 extern int proc_uuid_policy_lookup(uuid_t uuid, uint32_t *flags, int32_t *gencount);
  84
  85 extern void proc_uuid_policy_init(void);
  86
  87 extern int proc_uuid_policy_kernel(uint32_t operation, uuid_t uuid, uint32_t flags);
  88 #endif /* BSD_KERNEL_PRIVATE */
  89
  90 #ifndef KERNEL
  91 /*
  92  * Upload a policy indexed by UUID.
  93  *
  94  * Parameters:
  95  *     operation     CLEAR    Clear specified flags for all entries.
  96  *                            Entries are removed if they have no remaining flags.
  97  *                   ADD      Add the specified UUID and flags to the policy table.
  98  *                            Flags are ORed  with existing entries for the UUID.
  99  *                   REMOVE   Mask out flags in the entry for the specified UUID.
 100  *                            Entry is removed if it has no remaining flags.
 101  *     uuid          Pointer to UUID for Mach-O executable
 102  *     uuidlen       sizeof(uuid_t)
 103  *     flags         Flags to be stored in the policy table. See operation notes above.
 104  *
 105  * Return:
 106  *     0        Success, operation completed without error.
 107  *     -1       Failure, errno can contain:
 108  *         ENOENT   REMOVE operation specified a UUID not in the policy table.
 109  *         EPERM    Call is not privileged to call this system call
 110  *         EINVAL   Invalid parameter
 111  *         ERANGE   Invalid uuidlen
 112  *         ENOMEM   Too many entries exist
 113  */
 114 extern int proc_uuid_policy(uint32_t operation, uuid_t uuid, size_t uuidlen, uint32_t flags);
 115 #endif /* !KERNEL */
 116
 117 __END_DECLS
 118
 119 #endif /*_SYS_PROC_UUID_POLICY_H */