security/integrity/integrity.h

   1 /*
   2  * Copyright (C) 2009-2010 IBM Corporation
   3  *
   4  * Authors:
   5  * Mimi Zohar <zohar@us.ibm.com>
   6  *
   7  * This program is free software; you can redistribute it and/or
   8  * modify it under the terms of the GNU General Public License as
   9  * published by the Free Software Foundation, version 2 of the
  10  * License.
  11  *
  12  */
  13
  14 #include <linux/types.h>
  15 #include <linux/integrity.h>
  16 #include <crypto/sha.h>
  17
  18 /* iint cache flags */
  19 #define IMA_MEASURED            0x01
  20
  21 /* integrity data associated with an inode */
  22 struct integrity_iint_cache {
  23         struct rb_node rb_node; /* rooted in integrity_iint_tree */
  24         struct inode *inode;    /* back pointer to inode in question */
  25         u64 version;            /* track inode changes */
  26         unsigned char flags;
  27         u8 digest[SHA1_DIGEST_SIZE];
  28         struct mutex mutex;     /* protects: version, flags, digest */
  29         enum integrity_status hmac_status;
  30 };
  31
  32 /* rbtree tree calls to lookup, insert, delete
  33  * integrity data associated with an inode.
  34  */
  35 struct integrity_iint_cache *integrity_iint_insert(struct inode *inode);
  36 struct integrity_iint_cache *integrity_iint_find(struct inode *inode);