security/selinux/ss/mls.h

   1 /*
   2  * Multi-level security (MLS) policy operations.
   3  *
   4  * Author : Stephen Smalley, <sds@epoch.ncsc.mil>
   5  */
   6 /*
   7  * Updated: Trusted Computer Solutions, Inc. <dgoeddel@trustedcs.com>
   8  *
   9  *      Support for enhanced MLS infrastructure.
  10  *
  11  * Copyright (C) 2004-2006 Trusted Computer Solutions, Inc.
  12  */
  13
  14 #ifndef _SS_MLS_H_
  15 #define _SS_MLS_H_
  16
  17 #include "context.h"
  18 #include "policydb.h"
  19
  20 /*
  21  * Copies the MLS range from `src' into `dst'.
  22  */
  23 static inline int mls_copy_context(struct context *dst,
  24                                    struct context *src)
  25 {
  26         int l, rc = 0;
  27
  28         /* Copy the MLS range from the source context */
  29         for (l = 0; l < 2; l++) {
  30                 dst->range.level[l].sens = src->range.level[l].sens;
  31                 rc = ebitmap_cpy(&dst->range.level[l].cat,
  32                                  &src->range.level[l].cat);
  33                 if (rc)
  34                         break;
  35         }
  36
  37         return rc;
  38 }
  39
  40 int mls_compute_context_len(struct context *context);
  41 void mls_sid_to_context(struct context *context, char **scontext);
  42 int mls_context_isvalid(struct policydb *p, struct context *c);
  43
  44 int mls_context_to_sid(char oldc,
  45                        char **scontext,
  46                        struct context *context,
  47                        struct sidtab *s,
  48                        u32 def_sid);
  49
  50 int mls_from_string(char *str, struct context *context, gfp_t gfp_mask);
  51
  52 int mls_convert_context(struct policydb *oldp,
  53                         struct policydb *newp,
  54                         struct context *context);
  55
  56 int mls_compute_sid(struct context *scontext,
  57                     struct context *tcontext,
  58                     u16 tclass,
  59                     u32 specified,
  60                     struct context *newcontext);
  61
  62 int mls_setup_user_range(struct context *fromcon, struct user_datum *user,
  63                          struct context *usercon);
  64
  65 #endif  /* _SS_MLS_H */
  66