Cross-Referenced Linux and Device Driver Code

   /*
    * Linux Security plug
    *
    * Copyright (C) 2001 WireX Communications, Inc <chris@wirex.com>
    * Copyright (C) 2001 Greg Kroah-Hartman <greg@kroah.com>
    * Copyright (C) 2001 Networks Associates Technology, Inc <ssmalley@nai.com>
    * Copyright (C) 2001 James Morris <jmorris@intercode.com.au>
    * Copyright (C) 2001 Silicon Graphics, Inc. (Trust Technology Group)
    *
   *      This program is free software; you can redistribute it and/or modify
   *      it under the terms of the GNU General Public License as published by
   *      the Free Software Foundation; either version 2 of the License, or
   *      (at your option) any later version.
   *
   *      Due to this file being licensed under the GPL there is controversy over
   *      whether this permits you to write a module that #includes this file
   *      without placing your module under the GPL.  Please consult a lawyer for
   *      advice before doing this.
   *
   */
  
  #ifndef __LINUX_SECURITY_H
  #define __LINUX_SECURITY_H
  
  #include <linux/fs.h>
  #include <linux/binfmts.h>
  #include <linux/signal.h>
  #include <linux/resource.h>
  #include <linux/sem.h>
  #include <linux/shm.h>
  #include <linux/msg.h>
  #include <linux/sched.h>
  
  struct ctl_table;
  
  /*
   * These functions are in security/capability.c and are used
   * as the default capabilities functions
   */
  extern int cap_capable (struct task_struct *tsk, int cap);
  extern int cap_settime (struct timespec *ts, struct timezone *tz);
  extern int cap_ptrace (struct task_struct *parent, struct task_struct *child);
  extern int cap_capget (struct task_struct *target, kernel_cap_t *effective, kernel_cap_t *inheritable, kernel_cap_t *permitted);
  extern int cap_capset_check (struct task_struct *target, kernel_cap_t *effective, kernel_cap_t *inheritable, kernel_cap_t *permitted);
  extern void cap_capset_set (struct task_struct *target, kernel_cap_t *effective, kernel_cap_t *inheritable, kernel_cap_t *permitted);
  extern int cap_bprm_set_security (struct linux_binprm *bprm);
  extern void cap_bprm_apply_creds (struct linux_binprm *bprm, int unsafe);
  extern int cap_bprm_secureexec(struct linux_binprm *bprm);
  extern int cap_inode_setxattr(struct dentry *dentry, char *name, void *value, size_t size, int flags);
  extern int cap_inode_removexattr(struct dentry *dentry, char *name);
  extern int cap_task_post_setuid (uid_t old_ruid, uid_t old_euid, uid_t old_suid, int flags);
  extern void cap_task_reparent_to_init (struct task_struct *p);
  extern int cap_syslog (int type);
  extern int cap_vm_enough_memory (long pages);
  
  struct msghdr;
  struct sk_buff;
  struct sock;
  struct sockaddr;
  struct socket;
  
  extern int cap_netlink_send(struct sock *sk, struct sk_buff *skb);
  extern int cap_netlink_recv(struct sk_buff *skb);
  
  /*
   * Values used in the task_security_ops calls
   */
  /* setuid or setgid, id0 == uid or gid */
  #define LSM_SETID_ID    1
  
  /* setreuid or setregid, id0 == real, id1 == eff */
  #define LSM_SETID_RE    2
  
  /* setresuid or setresgid, id0 == real, id1 == eff, uid2 == saved */
  #define LSM_SETID_RES   4
  
  /* setfsuid or setfsgid, id0 == fsuid or fsgid */
  #define LSM_SETID_FS    8
  
  /* forward declares to avoid warnings */
  struct nfsctl_arg;
  struct sched_param;
  struct swap_info_struct;
  
  /* bprm_apply_creds unsafe reasons */
  #define LSM_UNSAFE_SHARE        1
  #define LSM_UNSAFE_PTRACE       2
  #define LSM_UNSAFE_PTRACE_CAP   4
  
  #ifdef CONFIG_SECURITY
  
  /**
   * struct security_operations - main security structure
   *
   * Security hooks for program execution operations.
   *
   * @bprm_alloc_security:
   *      Allocate and attach a security structure to the @bprm->security field.
   *      The security field is initialized to NULL when the bprm structure is
  *      allocated.
  *      @bprm contains the linux_binprm structure to be modified.
  *      Return 0 if operation was successful.
  * @bprm_free_security:
  *      @bprm contains the linux_binprm structure to be modified.
  *      Deallocate and clear the @bprm->security field.
  * @bprm_apply_creds:
  *      Compute and set the security attributes of a process being transformed
  *      by an execve operation based on the old attributes (current->security)
  *      and the information saved in @bprm->security by the set_security hook.
  *      Since this hook function (and its caller) are void, this hook can not
  *      return an error.  However, it can leave the security attributes of the
  *      process unchanged if an access failure occurs at this point.
  *      bprm_apply_creds is called under task_lock.  @unsafe indicates various
  *      reasons why it may be unsafe to change security state.
  *      @bprm contains the linux_binprm structure.
  * @bprm_post_apply_creds:
  *      Runs after bprm_apply_creds with the task_lock dropped, so that
  *      functions which cannot be called safely under the task_lock can
  *      be used.  This hook is a good place to perform state changes on
  *      the process such as closing open file descriptors to which access
  *      is no longer granted if the attributes were changed.
  *      Note that a security module might need to save state between
  *      bprm_apply_creds and bprm_post_apply_creds to store the decision
  *      on whether the process may proceed.
  *      @bprm contains the linux_binprm structure.
  * @bprm_set_security:
  *      Save security information in the bprm->security field, typically based
  *      on information about the bprm->file, for later use by the apply_creds
  *      hook.  This hook may also optionally check permissions (e.g. for
  *      transitions between security domains).
  *      This hook may be called multiple times during a single execve, e.g. for
  *      interpreters.  The hook can tell whether it has already been called by
  *      checking to see if @bprm->security is non-NULL.  If so, then the hook
  *      may decide either to retain the security information saved earlier or
  *      to replace it.
  *      @bprm contains the linux_binprm structure.
  *      Return 0 if the hook is successful and permission is granted.
  * @bprm_check_security:
  *      This hook mediates the point when a search for a binary handler will
  *      begin.  It allows a check the @bprm->security value which is set in
  *      the preceding set_security call.  The primary difference from
  *      set_security is that the argv list and envp list are reliably
  *      available in @bprm.  This hook may be called multiple times
  *      during a single execve; and in each pass set_security is called
  *      first.
  *      @bprm contains the linux_binprm structure.
  *      Return 0 if the hook is successful and permission is granted.
  * @bprm_secureexec:
  *      Return a boolean value (0 or 1) indicating whether a "secure exec" 
  *      is required.  The flag is passed in the auxiliary table
  *      on the initial stack to the ELF interpreter to indicate whether libc 
  *      should enable secure mode.
  *      @bprm contains the linux_binprm structure.
  *
  * Security hooks for filesystem operations.
  *
  * @sb_alloc_security:
  *      Allocate and attach a security structure to the sb->s_security field.
  *      The s_security field is initialized to NULL when the structure is
  *      allocated.
  *      @sb contains the super_block structure to be modified.
  *      Return 0 if operation was successful.
  * @sb_free_security:
  *      Deallocate and clear the sb->s_security field.
  *      @sb contains the super_block structure to be modified.
  * @sb_statfs:
  *      Check permission before obtaining filesystem statistics for the @sb
  *      filesystem.
  *      @sb contains the super_block structure for the filesystem.
  *      Return 0 if permission is granted.  
  * @sb_mount:
  *      Check permission before an object specified by @dev_name is mounted on
  *      the mount point named by @nd.  For an ordinary mount, @dev_name
  *      identifies a device if the file system type requires a device.  For a
  *      remount (@flags & MS_REMOUNT), @dev_name is irrelevant.  For a
  *      loopback/bind mount (@flags & MS_BIND), @dev_name identifies the
  *      pathname of the object being mounted.
  *      @dev_name contains the name for object being mounted.
  *      @nd contains the nameidata structure for mount point object.
  *      @type contains the filesystem type.
  *      @flags contains the mount flags.
  *      @data contains the filesystem-specific data.
  *      Return 0 if permission is granted.
  * @sb_copy_data:
  *      Allow mount option data to be copied prior to parsing by the filesystem,
  *      so that the security module can extract security-specific mount
  *      options cleanly (a filesystem may modify the data e.g. with strsep()).
  *      This also allows the original mount data to be stripped of security-
  *      specific options to avoid having to make filesystems aware of them.
  *      @type the type of filesystem being mounted.
  *      @orig the original mount data copied from userspace.
  *      @copy copied data which will be passed to the security module.
  *      Returns 0 if the copy was successful.
  * @sb_check_sb:
  *      Check permission before the device with superblock @mnt->sb is mounted
  *      on the mount point named by @nd.
  *      @mnt contains the vfsmount for device being mounted.
  *      @nd contains the nameidata object for the mount point.
  *      Return 0 if permission is granted.
  * @sb_umount:
  *      Check permission before the @mnt file system is unmounted.
  *      @mnt contains the mounted file system.
  *      @flags contains the unmount flags, e.g. MNT_FORCE.
  *      Return 0 if permission is granted.
  * @sb_umount_close:
  *      Close any files in the @mnt mounted filesystem that are held open by
  *      the security module.  This hook is called during an umount operation
  *      prior to checking whether the filesystem is still busy.
  *      @mnt contains the mounted filesystem.
  * @sb_umount_busy:
  *      Handle a failed umount of the @mnt mounted filesystem, e.g.  re-opening
  *      any files that were closed by umount_close.  This hook is called during
  *      an umount operation if the umount fails after a call to the
  *      umount_close hook.
  *      @mnt contains the mounted filesystem.
  * @sb_post_remount:
  *      Update the security module's state when a filesystem is remounted.
  *      This hook is only called if the remount was successful.
  *      @mnt contains the mounted file system.
  *      @flags contains the new filesystem flags.
  *      @data contains the filesystem-specific data.
  * @sb_post_mountroot:
  *      Update the security module's state when the root filesystem is mounted.
  *      This hook is only called if the mount was successful.
  * @sb_post_addmount:
  *      Update the security module's state when a filesystem is mounted.
  *      This hook is called any time a mount is successfully grafetd to
  *      the tree.
  *      @mnt contains the mounted filesystem.
  *      @mountpoint_nd contains the nameidata structure for the mount point.
  * @sb_pivotroot:
  *      Check permission before pivoting the root filesystem.
  *      @old_nd contains the nameidata structure for the new location of the current root (put_old).
  *      @new_nd contains the nameidata structure for the new root (new_root).
  *      Return 0 if permission is granted.
  * @sb_post_pivotroot:
  *      Update module state after a successful pivot.
  *      @old_nd contains the nameidata structure for the old root.
  *      @new_nd contains the nameidata structure for the new root.
  *
  * Security hooks for inode operations.
  *
  * @inode_alloc_security:
  *      Allocate and attach a security structure to @inode->i_security.  The
  *      i_security field is initialized to NULL when the inode structure is
  *      allocated.
  *      @inode contains the inode structure.
  *      Return 0 if operation was successful.
  * @inode_free_security:
  *      @inode contains the inode structure.
  *      Deallocate the inode security structure and set @inode->i_security to
  *      NULL. 
  * @inode_create:
  *      Check permission to create a regular file.
  *      @dir contains inode structure of the parent of the new file.
  *      @dentry contains the dentry structure for the file to be created.
  *      @mode contains the file mode of the file to be created.
  *      Return 0 if permission is granted.
  * @inode_post_create:
  *      Set the security attributes on a newly created regular file.  This hook
  *      is called after a file has been successfully created.
  *      @dir contains the inode structure of the parent directory of the new file.
  *      @dentry contains the the dentry structure for the newly created file.
  *      @mode contains the file mode.
  * @inode_link:
  *      Check permission before creating a new hard link to a file.
  *      @old_dentry contains the dentry structure for an existing link to the file.
  *      @dir contains the inode structure of the parent directory of the new link.
  *      @new_dentry contains the dentry structure for the new link.
  *      Return 0 if permission is granted.
  * @inode_post_link:
  *      Set security attributes for a new hard link to a file.
  *      @old_dentry contains the dentry structure for the existing link.
  *      @dir contains the inode structure of the parent directory of the new file.
  *      @new_dentry contains the dentry structure for the new file link.
  * @inode_unlink:
  *      Check the permission to remove a hard link to a file. 
  *      @dir contains the inode structure of parent directory of the file.
  *      @dentry contains the dentry structure for file to be unlinked.
  *      Return 0 if permission is granted.
  * @inode_symlink:
  *      Check the permission to create a symbolic link to a file.
  *      @dir contains the inode structure of parent directory of the symbolic link.
  *      @dentry contains the dentry structure of the symbolic link.
  *      @old_name contains the pathname of file.
  *      Return 0 if permission is granted.
  * @inode_post_symlink:
  *      @dir contains the inode structure of the parent directory of the new link.
  *      @dentry contains the dentry structure of new symbolic link.
  *      @old_name contains the pathname of file.
  *      Set security attributes for a newly created symbolic link.  Note that
  *      @dentry->d_inode may be NULL, since the filesystem might not
  *      instantiate the dentry (e.g. NFS).
  * @inode_mkdir:
  *      Check permissions to create a new directory in the existing directory
  *      associated with inode strcture @dir. 
  *      @dir containst the inode structure of parent of the directory to be created.
  *      @dentry contains the dentry structure of new directory.
  *      @mode contains the mode of new directory.
  *      Return 0 if permission is granted.
  * @inode_post_mkdir:
  *      Set security attributes on a newly created directory.
  *      @dir contains the inode structure of parent of the directory to be created.
  *      @dentry contains the dentry structure of new directory.
  *      @mode contains the mode of new directory.
  * @inode_rmdir:
  *      Check the permission to remove a directory.
  *      @dir contains the inode structure of parent of the directory to be removed.
  *      @dentry contains the dentry structure of directory to be removed.
  *      Return 0 if permission is granted.
  * @inode_mknod:
  *      Check permissions when creating a special file (or a socket or a fifo
  *      file created via the mknod system call).  Note that if mknod operation
  *      is being done for a regular file, then the create hook will be called
  *      and not this hook.
  *      @dir contains the inode structure of parent of the new file.
  *      @dentry contains the dentry structure of the new file.
  *      @mode contains the mode of the new file.
  *      @dev contains the the device number.
  *      Return 0 if permission is granted.
  * @inode_post_mknod:
  *      Set security attributes on a newly created special file (or socket or
  *      fifo file created via the mknod system call).
  *      @dir contains the inode structure of parent of the new node.
  *      @dentry contains the dentry structure of the new node.
  *      @mode contains the mode of the new node.
  *      @dev contains the the device number.
  * @inode_rename:
  *      Check for permission to rename a file or directory.
  *      @old_dir contains the inode structure for parent of the old link.
  *      @old_dentry contains the dentry structure of the old link.
  *      @new_dir contains the inode structure for parent of the new link.
  *      @new_dentry contains the dentry structure of the new link.
  *      Return 0 if permission is granted.
  * @inode_post_rename:
  *      Set security attributes on a renamed file or directory.
  *      @old_dir contains the inode structure for parent of the old link.
  *      @old_dentry contains the dentry structure of the old link.
  *      @new_dir contains the inode structure for parent of the new link.
  *      @new_dentry contains the dentry structure of the new link.
  * @inode_readlink:
  *      Check the permission to read the symbolic link.
  *      @dentry contains the dentry structure for the file link.
  *      Return 0 if permission is granted.
  * @inode_follow_link:
  *      Check permission to follow a symbolic link when looking up a pathname.
  *      @dentry contains the dentry structure for the link.
  *      @nd contains the nameidata structure for the parent directory.
  *      Return 0 if permission is granted.
  * @inode_permission:
  *      Check permission before accessing an inode.  This hook is called by the
  *      existing Linux permission function, so a security module can use it to
  *      provide additional checking for existing Linux permission checks.
  *      Notice that this hook is called when a file is opened (as well as many
  *      other operations), whereas the file_security_ops permission hook is
  *      called when the actual read/write operations are performed.
  *      @inode contains the inode structure to check.
  *      @mask contains the permission mask.
  *     @nd contains the nameidata (may be NULL).
  *      Return 0 if permission is granted.
  * @inode_setattr:
  *      Check permission before setting file attributes.  Note that the kernel
  *      call to notify_change is performed from several locations, whenever
  *      file attributes change (such as when a file is truncated, chown/chmod
  *      operations, transferring disk quotas, etc).
  *      @dentry contains the dentry structure for the file.
  *      @attr is the iattr structure containing the new file attributes.
  *      Return 0 if permission is granted.
  * @inode_getattr:
  *      Check permission before obtaining file attributes.
  *      @mnt is the vfsmount where the dentry was looked up
  *      @dentry contains the dentry structure for the file.
  *      Return 0 if permission is granted.
  * @inode_delete:
  *      @inode contains the inode structure for deleted inode.
  *      This hook is called when a deleted inode is released (i.e. an inode
  *      with no hard links has its use count drop to zero).  A security module
  *      can use this hook to release any persistent label associated with the
  *      inode.
  * @inode_setxattr:
  *      Check permission before setting the extended attributes
  *      @value identified by @name for @dentry.
  *      Return 0 if permission is granted.
  * @inode_post_setxattr:
  *      Update inode security field after successful setxattr operation.
  *      @value identified by @name for @dentry.
  * @inode_getxattr:
  *      Check permission before obtaining the extended attributes
  *      identified by @name for @dentry.
  *      Return 0 if permission is granted.
  * @inode_listxattr:
  *      Check permission before obtaining the list of extended attribute 
  *      names for @dentry.
  *      Return 0 if permission is granted.
  * @inode_removexattr:
  *      Check permission before removing the extended attribute
  *      identified by @name for @dentry.
  *      Return 0 if permission is granted.
  * @inode_getsecurity:
  *      Copy the extended attribute representation of the security label 
  *      associated with @name for @inode into @buffer.  @buffer may be
  *      NULL to request the size of the buffer required.  @size indicates
  *      the size of @buffer in bytes.  Note that @name is the remainder
  *      of the attribute name after the security. prefix has been removed.
  *      Return number of bytes used/required on success.
  * @inode_setsecurity:
  *      Set the security label associated with @name for @inode from the
  *      extended attribute value @value.  @size indicates the size of the
  *      @value in bytes.  @flags may be XATTR_CREATE, XATTR_REPLACE, or 0.
  *      Note that @name is the remainder of the attribute name after the 
  *      security. prefix has been removed.
  *      Return 0 on success.
  * @inode_listsecurity:
  *      Copy the extended attribute names for the security labels
  *      associated with @inode into @buffer.  The maximum size of @buffer
  *      is specified by @buffer_size.  @buffer may be NULL to request
  *      the size of the buffer required.
  *      Returns number of bytes used/required on success.
  *
  * Security hooks for file operations
  *
  * @file_permission:
  *      Check file permissions before accessing an open file.  This hook is
  *      called by various operations that read or write files.  A security
  *      module can use this hook to perform additional checking on these
  *      operations, e.g.  to revalidate permissions on use to support privilege
  *      bracketing or policy changes.  Notice that this hook is used when the
  *      actual read/write operations are performed, whereas the
  *      inode_security_ops hook is called when a file is opened (as well as
  *      many other operations).
  *      Caveat:  Although this hook can be used to revalidate permissions for
  *      various system call operations that read or write files, it does not
  *      address the revalidation of permissions for memory-mapped files.
  *      Security modules must handle this separately if they need such
  *      revalidation.
  *      @file contains the file structure being accessed.
  *      @mask contains the requested permissions.
  *      Return 0 if permission is granted.
  * @file_alloc_security:
  *      Allocate and attach a security structure to the file->f_security field.
  *      The security field is initialized to NULL when the structure is first
  *      created.
  *      @file contains the file structure to secure.
  *      Return 0 if the hook is successful and permission is granted.
  * @file_free_security:
  *      Deallocate and free any security structures stored in file->f_security.
  *      @file contains the file structure being modified.
  * @file_ioctl:
  *      @file contains the file structure.
  *      @cmd contains the operation to perform.
  *      @arg contains the operational arguments.
  *      Check permission for an ioctl operation on @file.  Note that @arg can
  *      sometimes represents a user space pointer; in other cases, it may be a
  *      simple integer value.  When @arg represents a user space pointer, it
  *      should never be used by the security module.
  *      Return 0 if permission is granted.
  * @file_mmap :
  *      Check permissions for a mmap operation.  The @file may be NULL, e.g.
  *      if mapping anonymous memory.
  *      @file contains the file structure for file to map (may be NULL).
  *      @prot contains the requested permissions.
  *      @flags contains the operational flags.
  *      Return 0 if permission is granted.
  * @file_mprotect:
  *      Check permissions before changing memory access permissions.
  *      @vma contains the memory region to modify.
  *      @prot contains the requested permissions.
  *      Return 0 if permission is granted.
  * @file_lock:
  *      Check permission before performing file locking operations.
  *      Note: this hook mediates both flock and fcntl style locks.
  *      @file contains the file structure.
  *      @cmd contains the posix-translated lock operation to perform
  *      (e.g. F_RDLCK, F_WRLCK).
  *      Return 0 if permission is granted.
  * @file_fcntl:
  *      Check permission before allowing the file operation specified by @cmd
  *      from being performed on the file @file.  Note that @arg can sometimes
  *      represents a user space pointer; in other cases, it may be a simple
  *      integer value.  When @arg represents a user space pointer, it should
  *      never be used by the security module.
  *      @file contains the file structure.
  *      @cmd contains the operation to be performed.
  *      @arg contains the operational arguments.
  *      Return 0 if permission is granted.
  * @file_set_fowner:
  *      Save owner security information (typically from current->security) in
  *      file->f_security for later use by the send_sigiotask hook.
  *      @file contains the file structure to update.
  *      Return 0 on success.
  * @file_send_sigiotask:
  *      Check permission for the file owner @fown to send SIGIO or SIGURG to the
  *      process @tsk.  Note that this hook is sometimes called from interrupt.
  *      Note that the fown_struct, @fown, is never outside the context of a
  *      struct file, so the file structure (and associated security information)
  *      can always be obtained:
  *              (struct file *)((long)fown - offsetof(struct file,f_owner));
  *      @tsk contains the structure of task receiving signal.
  *      @fown contains the file owner information.
  *      @sig is the signal that will be sent.  When 0, kernel sends SIGIO.
  *      Return 0 if permission is granted.
  * @file_receive:
  *      This hook allows security modules to control the ability of a process
  *      to receive an open file descriptor via socket IPC.
  *      @file contains the file structure being received.
  *      Return 0 if permission is granted.
  *
  * Security hooks for task operations.
  *
  * @task_create:
  *      Check permission before creating a child process.  See the clone(2)
  *      manual page for definitions of the @clone_flags.
  *      @clone_flags contains the flags indicating what should be shared.
  *      Return 0 if permission is granted.
  * @task_alloc_security:
  *      @p contains the task_struct for child process.
  *      Allocate and attach a security structure to the p->security field. The
  *      security field is initialized to NULL when the task structure is
  *      allocated.
  *      Return 0 if operation was successful.
  * @task_free_security:
  *      @p contains the task_struct for process.
  *      Deallocate and clear the p->security field.
  * @task_setuid:
  *      Check permission before setting one or more of the user identity
  *      attributes of the current process.  The @flags parameter indicates
  *      which of the set*uid system calls invoked this hook and how to
  *      interpret the @id0, @id1, and @id2 parameters.  See the LSM_SETID
  *      definitions at the beginning of this file for the @flags values and
  *      their meanings.
  *      @id0 contains a uid.
  *      @id1 contains a uid.
  *      @id2 contains a uid.
  *      @flags contains one of the LSM_SETID_* values.
  *      Return 0 if permission is granted.
  * @task_post_setuid:
  *      Update the module's state after setting one or more of the user
  *      identity attributes of the current process.  The @flags parameter
  *      indicates which of the set*uid system calls invoked this hook.  If
  *      @flags is LSM_SETID_FS, then @old_ruid is the old fs uid and the other
  *      parameters are not used.
  *      @old_ruid contains the old real uid (or fs uid if LSM_SETID_FS).
  *      @old_euid contains the old effective uid (or -1 if LSM_SETID_FS).
  *      @old_suid contains the old saved uid (or -1 if LSM_SETID_FS).
  *      @flags contains one of the LSM_SETID_* values.
  *      Return 0 on success.
  * @task_setgid:
  *      Check permission before setting one or more of the group identity
  *      attributes of the current process.  The @flags parameter indicates
  *      which of the set*gid system calls invoked this hook and how to
  *      interpret the @id0, @id1, and @id2 parameters.  See the LSM_SETID
  *      definitions at the beginning of this file for the @flags values and
  *      their meanings.
  *      @id0 contains a gid.
  *      @id1 contains a gid.
  *      @id2 contains a gid.
  *      @flags contains one of the LSM_SETID_* values.
  *      Return 0 if permission is granted.
  * @task_setpgid:
  *      Check permission before setting the process group identifier of the
  *      process @p to @pgid.
  *      @p contains the task_struct for process being modified.
  *      @pgid contains the new pgid.
  *      Return 0 if permission is granted.
  * @task_getpgid:
  *      Check permission before getting the process group identifier of the
  *      process @p.
  *      @p contains the task_struct for the process.
  *      Return 0 if permission is granted.
  * @task_getsid:
  *      Check permission before getting the session identifier of the process
  *      @p.
  *      @p contains the task_struct for the process.
  *      Return 0 if permission is granted.
  * @task_setgroups:
  *      Check permission before setting the supplementary group set of the
  *      current process.
  *      @group_info contains the new group information.
  *      Return 0 if permission is granted.
  * @task_setnice:
  *      Check permission before setting the nice value of @p to @nice.
  *      @p contains the task_struct of process.
  *      @nice contains the new nice value.
  *      Return 0 if permission is granted.
  * @task_setrlimit:
  *      Check permission before setting the resource limits of the current
  *      process for @resource to @new_rlim.  The old resource limit values can
  *      be examined by dereferencing (current->signal->rlim + resource).
  *      @resource contains the resource whose limit is being set.
  *      @new_rlim contains the new limits for @resource.
  *      Return 0 if permission is granted.
  * @task_setscheduler:
  *      Check permission before setting scheduling policy and/or parameters of
  *      process @p based on @policy and @lp.
  *      @p contains the task_struct for process.
  *      @policy contains the scheduling policy.
  *      @lp contains the scheduling parameters.
  *      Return 0 if permission is granted.
  * @task_getscheduler:
  *      Check permission before obtaining scheduling information for process
  *      @p.
  *      @p contains the task_struct for process.
  *      Return 0 if permission is granted.
  * @task_kill:
  *      Check permission before sending signal @sig to @p.  @info can be NULL,
  *      the constant 1, or a pointer to a siginfo structure.  If @info is 1 or
  *      SI_FROMKERNEL(info) is true, then the signal should be viewed as coming
  *      from the kernel and should typically be permitted.
  *      SIGIO signals are handled separately by the send_sigiotask hook in
  *      file_security_ops.
  *      @p contains the task_struct for process.
  *      @info contains the signal information.
  *      @sig contains the signal value.
  *      Return 0 if permission is granted.
  * @task_wait:
  *      Check permission before allowing a process to reap a child process @p
  *      and collect its status information.
  *      @p contains the task_struct for process.
  *      Return 0 if permission is granted.
  * @task_prctl:
  *      Check permission before performing a process control operation on the
  *      current process.
  *      @option contains the operation.
  *      @arg2 contains a argument.
  *      @arg3 contains a argument.
  *      @arg4 contains a argument.
  *      @arg5 contains a argument.
  *      Return 0 if permission is granted.
  * @task_reparent_to_init:
  *      Set the security attributes in @p->security for a kernel thread that
  *      is being reparented to the init task.
  *      @p contains the task_struct for the kernel thread.
  * @task_to_inode:
  *      Set the security attributes for an inode based on an associated task's
  *      security attributes, e.g. for /proc/pid inodes.
  *      @p contains the task_struct for the task.
  *      @inode contains the inode structure for the inode.
  *
  * Security hooks for Netlink messaging.
  *
  * @netlink_send:
  *      Save security information for a netlink message so that permission
  *      checking can be performed when the message is processed.  The security
  *      information can be saved using the eff_cap field of the
  *      netlink_skb_parms structure.  Also may be used to provide fine
  *      grained control over message transmission.
  *      @sk associated sock of task sending the message.,
  *      @skb contains the sk_buff structure for the netlink message.
  *      Return 0 if the information was successfully saved and message
  *      is allowed to be transmitted.
  * @netlink_recv:
  *      Check permission before processing the received netlink message in
  *      @skb.
  *      @skb contains the sk_buff structure for the netlink message.
  *      Return 0 if permission is granted.
  *
  * Security hooks for Unix domain networking.
  *
  * @unix_stream_connect:
  *      Check permissions before establishing a Unix domain stream connection
  *      between @sock and @other.
  *      @sock contains the socket structure.
  *      @other contains the peer socket structure.
  *      Return 0 if permission is granted.
  * @unix_may_send:
  *      Check permissions before connecting or sending datagrams from @sock to
  *      @other.
  *      @sock contains the socket structure.
  *      @sock contains the peer socket structure.
  *      Return 0 if permission is granted.
  *
  * The @unix_stream_connect and @unix_may_send hooks were necessary because
  * Linux provides an alternative to the conventional file name space for Unix
  * domain sockets.  Whereas binding and connecting to sockets in the file name
  * space is mediated by the typical file permissions (and caught by the mknod
  * and permission hooks in inode_security_ops), binding and connecting to
  * sockets in the abstract name space is completely unmediated.  Sufficient
  * control of Unix domain sockets in the abstract name space isn't possible
  * using only the socket layer hooks, since we need to know the actual target
  * socket, which is not looked up until we are inside the af_unix code.
  *
  * Security hooks for socket operations.
  *
  * @socket_create:
  *      Check permissions prior to creating a new socket.
  *      @family contains the requested protocol family.
  *      @type contains the requested communications type.
  *      @protocol contains the requested protocol.
  *      @kern set to 1 if a kernel socket.
  *      Return 0 if permission is granted.
  * @socket_post_create:
  *      This hook allows a module to update or allocate a per-socket security
  *      structure. Note that the security field was not added directly to the
  *      socket structure, but rather, the socket security information is stored
  *      in the associated inode.  Typically, the inode alloc_security hook will
  *      allocate and and attach security information to
  *      sock->inode->i_security.  This hook may be used to update the
  *      sock->inode->i_security field with additional information that wasn't
  *      available when the inode was allocated.
  *      @sock contains the newly created socket structure.
  *      @family contains the requested protocol family.
  *      @type contains the requested communications type.
  *      @protocol contains the requested protocol.
  *      @kern set to 1 if a kernel socket.
  * @socket_bind:
  *      Check permission before socket protocol layer bind operation is
  *      performed and the socket @sock is bound to the address specified in the
  *      @address parameter.
  *      @sock contains the socket structure.
  *      @address contains the address to bind to.
  *      @addrlen contains the length of address.
  *      Return 0 if permission is granted.  
  * @socket_connect:
  *      Check permission before socket protocol layer connect operation
  *      attempts to connect socket @sock to a remote address, @address.
  *      @sock contains the socket structure.
  *      @address contains the address of remote endpoint.
  *      @addrlen contains the length of address.
  *      Return 0 if permission is granted.  
  * @socket_listen:
  *      Check permission before socket protocol layer listen operation.
  *      @sock contains the socket structure.
  *      @backlog contains the maximum length for the pending connection queue.
  *      Return 0 if permission is granted.
  * @socket_accept:
  *      Check permission before accepting a new connection.  Note that the new
  *      socket, @newsock, has been created and some information copied to it,
  *      but the accept operation has not actually been performed.
  *      @sock contains the listening socket structure.
  *      @newsock contains the newly created server socket for connection.
  *      Return 0 if permission is granted.
  * @socket_post_accept:
  *      This hook allows a security module to copy security
  *      information into the newly created socket's inode.
  *      @sock contains the listening socket structure.
  *      @newsock contains the newly created server socket for connection.
  * @socket_sendmsg:
  *      Check permission before transmitting a message to another socket.
  *      @sock contains the socket structure.
  *      @msg contains the message to be transmitted.
  *      @size contains the size of message.
  *      Return 0 if permission is granted.
  * @socket_recvmsg:
  *      Check permission before receiving a message from a socket.
  *      @sock contains the socket structure.
  *      @msg contains the message structure.
  *      @size contains the size of message structure.
  *      @flags contains the operational flags.
  *      Return 0 if permission is granted.  
  * @socket_getsockname:
  *      Check permission before the local address (name) of the socket object
  *      @sock is retrieved.
  *      @sock contains the socket structure.
  *      Return 0 if permission is granted.
  * @socket_getpeername:
  *      Check permission before the remote address (name) of a socket object
  *      @sock is retrieved.
  *      @sock contains the socket structure.
  *      Return 0 if permission is granted.
  * @socket_getsockopt:
  *      Check permissions before retrieving the options associated with socket
  *      @sock.
  *      @sock contains the socket structure.
  *      @level contains the protocol level to retrieve option from.
  *      @optname contains the name of option to retrieve.
  *      Return 0 if permission is granted.
  * @socket_setsockopt:
  *      Check permissions before setting the options associated with socket
  *      @sock.
  *      @sock contains the socket structure.
  *      @level contains the protocol level to set options for.
  *      @optname contains the name of the option to set.
  *      Return 0 if permission is granted.  
  * @socket_shutdown:
  *      Checks permission before all or part of a connection on the socket
  *      @sock is shut down.
  *      @sock contains the socket structure.
  *      @how contains the flag indicating how future sends and receives are handled.
  *      Return 0 if permission is granted.
  * @socket_sock_rcv_skb:
  *      Check permissions on incoming network packets.  This hook is distinct
  *      from Netfilter's IP input hooks since it is the first time that the
  *      incoming sk_buff @skb has been associated with a particular socket, @sk.
  *      @sk contains the sock (not socket) associated with the incoming sk_buff.
  *      @skb contains the incoming network data.
  * @socket_getpeersec:
  *      This hook allows the security module to provide peer socket security
  *      state to userspace via getsockopt SO_GETPEERSEC.
  *      @sock is the local socket.
  *      @optval userspace memory where the security state is to be copied.
  *      @optlen userspace int where the module should copy the actual length
  *      of the security state.
  *      @len as input is the maximum length to copy to userspace provided
  *      by the caller.
  *      Return 0 if all is well, otherwise, typical getsockopt return
  *      values.
  * @sk_alloc_security:
  *      Allocate and attach a security structure to the sk->sk_security field,
  *      which is used to copy security attributes between local stream sockets.
  * @sk_free_security:
  *      Deallocate security structure.
  *
  * Security hooks affecting all System V IPC operations.
  *
  * @ipc_permission:
  *      Check permissions for access to IPC
  *      @ipcp contains the kernel IPC permission structure
  *      @flag contains the desired (requested) permission set
  *      Return 0 if permission is granted.
  *
  * Security hooks for individual messages held in System V IPC message queues
  * @msg_msg_alloc_security:
  *      Allocate and attach a security structure to the msg->security field.
  *      The security field is initialized to NULL when the structure is first
  *      created.
  *      @msg contains the message structure to be modified.
  *      Return 0 if operation was successful and permission is granted.
  * @msg_msg_free_security:
  *      Deallocate the security structure for this message.
  *      @msg contains the message structure to be modified.
  *
  * Security hooks for System V IPC Message Queues
  *
  * @msg_queue_alloc_security:
  *      Allocate and attach a security structure to the
  *      msq->q_perm.security field. The security field is initialized to
  *      NULL when the structure is first created.
  *      @msq contains the message queue structure to be modified.
  *      Return 0 if operation was successful and permission is granted.
  * @msg_queue_free_security:
  *      Deallocate security structure for this message queue.
  *      @msq contains the message queue structure to be modified.
  * @msg_queue_associate:
  *      Check permission when a message queue is requested through the
  *      msgget system call.  This hook is only called when returning the
  *      message queue identifier for an existing message queue, not when a
  *      new message queue is created.
  *      @msq contains the message queue to act upon.
  *      @msqflg contains the operation control flags.
  *      Return 0 if permission is granted.
  * @msg_queue_msgctl:
  *      Check permission when a message control operation specified by @cmd
  *      is to be performed on the message queue @msq.
  *      The @msq may be NULL, e.g. for IPC_INFO or MSG_INFO.
  *      @msq contains the message queue to act upon.  May be NULL.
  *      @cmd contains the operation to be performed.
  *      Return 0 if permission is granted.  
  * @msg_queue_msgsnd:
  *      Check permission before a message, @msg, is enqueued on the message
  *      queue, @msq.
  *      @msq contains the message queue to send message to.
  *      @msg contains the message to be enqueued.
  *      @msqflg contains operational flags.
  *      Return 0 if permission is granted.
  * @msg_queue_msgrcv:
  *      Check permission before a message, @msg, is removed from the message
  *      queue, @msq.  The @target task structure contains a pointer to the 
  *      process that will be receiving the message (not equal to the current 
  *      process when inline receives are being performed).
  *      @msq contains the message queue to retrieve message from.
  *      @msg contains the message destination.
  *      @target contains the task structure for recipient process.
  *      @type contains the type of message requested.
  *      @mode contains the operational flags.
  *      Return 0 if permission is granted.
  *
  * Security hooks for System V Shared Memory Segments
  *
  * @shm_alloc_security:
  *      Allocate and attach a security structure to the shp->shm_perm.security
  *      field.  The security field is initialized to NULL when the structure is
  *      first created.
  *      @shp contains the shared memory structure to be modified.
  *      Return 0 if operation was successful and permission is granted.
  * @shm_free_security:
  *      Deallocate the security struct for this memory segment.
  *      @shp contains the shared memory structure to be modified.
  * @shm_associate:
  *      Check permission when a shared memory region is requested through the
  *      shmget system call.  This hook is only called when returning the shared
  *      memory region identifier for an existing region, not when a new shared
  *      memory region is created.
  *      @shp contains the shared memory structure to be modified.
  *      @shmflg contains the operation control flags.
  *      Return 0 if permission is granted.
  * @shm_shmctl:
  *      Check permission when a shared memory control operation specified by
  *      @cmd is to be performed on the shared memory region @shp.
  *      The @shp may be NULL, e.g. for IPC_INFO or SHM_INFO.
  *      @shp contains shared memory structure to be modified.
  *      @cmd contains the operation to be performed.
  *      Return 0 if permission is granted.
  * @shm_shmat:
  *      Check permissions prior to allowing the shmat system call to attach the
  *      shared memory segment @shp to the data segment of the calling process.
  *      The attaching address is specified by @shmaddr.
  *      @shp contains the shared memory structure to be modified.
  *      @shmaddr contains the address to attach memory region to.
  *      @shmflg contains the operational flags.
  *      Return 0 if permission is granted.
  *
  * Security hooks for System V Semaphores
  *
  * @sem_alloc_security:
  *      Allocate and attach a security structure to the sma->sem_perm.security
  *      field.  The security field is initialized to NULL when the structure is
  *      first created.
  *      @sma contains the semaphore structure
  *      Return 0 if operation was successful and permission is granted.
  * @sem_free_security:
  *      deallocate security struct for this semaphore
  *      @sma contains the semaphore structure.
  * @sem_associate:
  *      Check permission when a semaphore is requested through the semget
  *      system call.  This hook is only called when returning the semaphore
  *      identifier for an existing semaphore, not when a new one must be
  *      created.
  *      @sma contains the semaphore structure.
  *      @semflg contains the operation control flags.
  *      Return 0 if permission is granted.
  * @sem_semctl:
  *      Check permission when a semaphore operation specified by @cmd is to be
  *      performed on the semaphore @sma.  The @sma may be NULL, e.g. for 
  *      IPC_INFO or SEM_INFO.
  *      @sma contains the semaphore structure.  May be NULL.
  *      @cmd contains the operation to be performed.
  *      Return 0 if permission is granted.
  * @sem_semop
  *      Check permissions before performing operations on members of the
  *      semaphore set @sma.  If the @alter flag is nonzero, the semaphore set 
  *      may be modified.
  *      @sma contains the semaphore structure.
  *      @sops contains the operations to perform.
  *      @nsops contains the number of operations to perform.
  *      @alter contains the flag indicating whether changes are to be made.
  *      Return 0 if permission is granted.
  *
  * @ptrace:
  *      Check permission before allowing the @parent process to trace the
  *      @child process.
  *      Security modules may also want to perform a process tracing check
  *      during an execve in the set_security or apply_creds hooks of
  *      binprm_security_ops if the process is being traced and its security
  *      attributes would be changed by the execve.
  *      @parent contains the task_struct structure for parent process.
  *      @child contains the task_struct structure for child process.
  *      Return 0 if permission is granted.
  * @capget:
  *      Get the @effective, @inheritable, and @permitted capability sets for
  *      the @target process.  The hook may also perform permission checking to
  *      determine if the current process is allowed to see the capability sets
  *      of the @target process.
  *      @target contains the task_struct structure for target process.
  *      @effective contains the effective capability set.
  *      @inheritable contains the inheritable capability set.
  *      @permitted contains the permitted capability set.
  *      Return 0 if the capability sets were successfully obtained.
  * @capset_check:
  *      Check permission before setting the @effective, @inheritable, and
  *      @permitted capability sets for the @target process.
  *      Caveat:  @target is also set to current if a set of processes is
  *      specified (i.e. all processes other than current and init or a
  *      particular process group).  Hence, the capset_set hook may need to
  *      revalidate permission to the actual target process.
  *      @target contains the task_struct structure for target process.
  *      @effective contains the effective capability set.
  *      @inheritable contains the inheritable capability set.
  *      @permitted contains the permitted capability set.
  *      Return 0 if permission is granted.
  * @capset_set:
  *      Set the @effective, @inheritable, and @permitted capability sets for
  *      the @target process.  Since capset_check cannot always check permission
  *      to the real @target process, this hook may also perform permission
  *      checking to determine if the current process is allowed to set the
  *      capability sets of the @target process.  However, this hook has no way
  *      of returning an error due to the structure of the sys_capset code.
  *      @target contains the task_struct structure for target process.
  *      @effective contains the effective capability set.
  *      @inheritable contains the inheritable capability set.
  *      @permitted contains the permitted capability set.
  * @acct:
  *      Check permission before enabling or disabling process accounting.  If
  *      accounting is being enabled, then @file refers to the open file used to
  *      store accounting records.  If accounting is being disabled, then @file
  *      is NULL.
  *      @file contains the file structure for the accounting file (may be NULL).
  *      Return 0 if permission is granted.
  * @sysctl:
  *      Check permission before accessing the @table sysctl variable in the
  *      manner specified by @op.
  *      @table contains the ctl_table structure for the sysctl variable.
  *      @op contains the operation (001 = search, 002 = write, 004 = read).
  *      Return 0 if permission is granted.
  * @capable:
  *      Check whether the @tsk process has the @cap capability.
  *      @tsk contains the task_struct for the process.
  *      @cap contains the capability <include/linux/capability.h>.
  *      Return 0 if the capability is granted for @tsk.
  * @syslog:
  *      Check permission before accessing the kernel message ring or changing
  *      logging to the console.
  *      See the syslog(2) manual page for an explanation of the @type values.  
  *      @type contains the type of action.
  *      Return 0 if permission is granted.
  * @settime:
  *      Check permission to change the system time.
  *      struct timespec and timezone are defined in include/linux/time.h
  *      @ts contains new time
  *      @tz contains new timezone
  *      Return 0 if permission is granted.
  * @vm_enough_memory:
  *      Check permissions for allocating a new virtual mapping.
  *      @pages contains the number of pages.
  *      Return 0 if permission is granted.
  *
  * @register_security:
  *      allow module stacking.
  *      @name contains the name of the security module being stacked.
  *      @ops contains a pointer to the struct security_operations of the module to stack.
  * @unregister_security:
  *      remove a stacked module.
  *      @name contains the name of the security module being unstacked.
  *      @ops contains a pointer to the struct security_operations of the module to unstack.
  * 
  * This is the main security structure.
  */
 struct security_operations {
         int (*ptrace) (struct task_struct * parent, struct task_struct * child);
         int (*capget) (struct task_struct * target,
                        kernel_cap_t * effective,
                        kernel_cap_t * inheritable, kernel_cap_t * permitted);
         int (*capset_check) (struct task_struct * target,
                              kernel_cap_t * effective,
                              kernel_cap_t * inheritable,
                              kernel_cap_t * permitted);
         void (*capset_set) (struct task_struct * target,
                             kernel_cap_t * effective,
                             kernel_cap_t * inheritable,
                             kernel_cap_t * permitted);
         int (*acct) (struct file * file);
         int (*sysctl) (struct ctl_table * table, int op);
         int (*capable) (struct task_struct * tsk, int cap);
         int (*quotactl) (int cmds, int type, int id, struct super_block * sb);
         int (*quota_on) (struct dentry * dentry);
         int (*syslog) (int type);
         int (*settime) (struct timespec *ts, struct timezone *tz);
         int (*vm_enough_memory) (long pages);
 
         int (*bprm_alloc_security) (struct linux_binprm * bprm);
         void (*bprm_free_security) (struct linux_binprm * bprm);
         void (*bprm_apply_creds) (struct linux_binprm * bprm, int unsafe);
         void (*bprm_post_apply_creds) (struct linux_binprm * bprm);
         int (*bprm_set_security) (struct linux_binprm * bprm);
         int (*bprm_check_security) (struct linux_binprm * bprm);
         int (*bprm_secureexec) (struct linux_binprm * bprm);
 
         int (*sb_alloc_security) (struct super_block * sb);
         void (*sb_free_security) (struct super_block * sb);
         int (*sb_copy_data)(struct file_system_type *type,
                             void *orig, void *copy);
         int (*sb_kern_mount) (struct super_block *sb, void *data);
         int (*sb_statfs) (struct super_block * sb);
         int (*sb_mount) (char *dev_name, struct nameidata * nd,
                          char *type, unsigned long flags, void *data);
         int (*sb_check_sb) (struct vfsmount * mnt, struct nameidata * nd);
         int (*sb_umount) (struct vfsmount * mnt, int flags);
         void (*sb_umount_close) (struct vfsmount * mnt);
         void (*sb_umount_busy) (struct vfsmount * mnt);
         void (*sb_post_remount) (struct vfsmount * mnt,
                                  unsigned long flags, void *data);
         void (*sb_post_mountroot) (void);
         void (*sb_post_addmount) (struct vfsmount * mnt,
                                   struct nameidata * mountpoint_nd);
         int (*sb_pivotroot) (struct nameidata * old_nd,
                              struct nameidata * new_nd);
         void (*sb_post_pivotroot) (struct nameidata * old_nd,
                                    struct nameidata * new_nd);
 
         int (*inode_alloc_security) (struct inode *inode);      
         void (*inode_free_security) (struct inode *inode);
         int (*inode_create) (struct inode *dir,
                              struct dentry *dentry, int mode);
         void (*inode_post_create) (struct inode *dir,
                                    struct dentry *dentry, int mode);
         int (*inode_link) (struct dentry *old_dentry,
                            struct inode *dir, struct dentry *new_dentry);
         void (*inode_post_link) (struct dentry *old_dentry,
                                  struct inode *dir, struct dentry *new_dentry);
         int (*inode_unlink) (struct inode *dir, struct dentry *dentry);
         int (*inode_symlink) (struct inode *dir,
                               struct dentry *dentry, const char *old_name);
         void (*inode_post_symlink) (struct inode *dir,
                                     struct dentry *dentry,
                                     const char *old_name);
         int (*inode_mkdir) (struct inode *dir, struct dentry *dentry, int mode);
         void (*inode_post_mkdir) (struct inode *dir, struct dentry *dentry, 
                             int mode);
         int (*inode_rmdir) (struct inode *dir, struct dentry *dentry);
         int (*inode_mknod) (struct inode *dir, struct dentry *dentry,
                             int mode, dev_t dev);
         void (*inode_post_mknod) (struct inode *dir, struct dentry *dentry,
                                   int mode, dev_t dev);
         int (*inode_rename) (struct inode *old_dir, struct dentry *old_dentry,
                              struct inode *new_dir, struct dentry *new_dentry);
         void (*inode_post_rename) (struct inode *old_dir,
                                    struct dentry *old_dentry,
                                    struct inode *new_dir,
                                    struct dentry *new_dentry);
         int (*inode_readlink) (struct dentry *dentry);
         int (*inode_follow_link) (struct dentry *dentry, struct nameidata *nd);
         int (*inode_permission) (struct inode *inode, int mask, struct nameidata *nd);
         int (*inode_setattr)    (struct dentry *dentry, struct iattr *attr);
         int (*inode_getattr) (struct vfsmount *mnt, struct dentry *dentry);
         void (*inode_delete) (struct inode *inode);
         int (*inode_setxattr) (struct dentry *dentry, char *name, void *value,
                                size_t size, int flags);
         void (*inode_post_setxattr) (struct dentry *dentry, char *name, void *value,
                                      size_t size, int flags);
         int (*inode_getxattr) (struct dentry *dentry, char *name);
         int (*inode_listxattr) (struct dentry *dentry);
         int (*inode_removexattr) (struct dentry *dentry, char *name);
         int (*inode_getsecurity)(struct inode *inode, const char *name, void *buffer, size_t size);
         int (*inode_setsecurity)(struct inode *inode, const char *name, const void *value, size_t size, int flags);
         int (*inode_listsecurity)(struct inode *inode, char *buffer, size_t buffer_size);
 
         int (*file_permission) (struct file * file, int mask);
         int (*file_alloc_security) (struct file * file);
         void (*file_free_security) (struct file * file);
         int (*file_ioctl) (struct file * file, unsigned int cmd,
                            unsigned long arg);
         int (*file_mmap) (struct file * file,
                           unsigned long prot, unsigned long flags);
         int (*file_mprotect) (struct vm_area_struct * vma, unsigned long prot);
         int (*file_lock) (struct file * file, unsigned int cmd);
         int (*file_fcntl) (struct file * file, unsigned int cmd,
                            unsigned long arg);
         int (*file_set_fowner) (struct file * file);
         int (*file_send_sigiotask) (struct task_struct * tsk,
                                     struct fown_struct * fown, int sig);
         int (*file_receive) (struct file * file);
 
         int (*task_create) (unsigned long clone_flags);
         int (*task_alloc_security) (struct task_struct * p);
         void (*task_free_security) (struct task_struct * p);
         int (*task_setuid) (uid_t id0, uid_t id1, uid_t id2, int flags);
         int (*task_post_setuid) (uid_t old_ruid /* or fsuid */ ,
                                  uid_t old_euid, uid_t old_suid, int flags);
         int (*task_setgid) (gid_t id0, gid_t id1, gid_t id2, int flags);
         int (*task_setpgid) (struct task_struct * p, pid_t pgid);
         int (*task_getpgid) (struct task_struct * p);
         int (*task_getsid) (struct task_struct * p);
         int (*task_setgroups) (struct group_info *group_info);
         int (*task_setnice) (struct task_struct * p, int nice);
         int (*task_setrlimit) (unsigned int resource, struct rlimit * new_rlim);
         int (*task_setscheduler) (struct task_struct * p, int policy,
                                   struct sched_param * lp);
         int (*task_getscheduler) (struct task_struct * p);
         int (*task_kill) (struct task_struct * p,
                           struct siginfo * info, int sig);
         int (*task_wait) (struct task_struct * p);
         int (*task_prctl) (int option, unsigned long arg2,
                            unsigned long arg3, unsigned long arg4,
                            unsigned long arg5);
         void (*task_reparent_to_init) (struct task_struct * p);
         void (*task_to_inode)(struct task_struct *p, struct inode *inode);
 
         int (*ipc_permission) (struct kern_ipc_perm * ipcp, short flag);
 
         int (*msg_msg_alloc_security) (struct msg_msg * msg);
         void (*msg_msg_free_security) (struct msg_msg * msg);
 
         int (*msg_queue_alloc_security) (struct msg_queue * msq);
         void (*msg_queue_free_security) (struct msg_queue * msq);
         int (*msg_queue_associate) (struct msg_queue * msq, int msqflg);
         int (*msg_queue_msgctl) (struct msg_queue * msq, int cmd);
         int (*msg_queue_msgsnd) (struct msg_queue * msq,
                                  struct msg_msg * msg, int msqflg);
         int (*msg_queue_msgrcv) (struct msg_queue * msq,
                                  struct msg_msg * msg,
                                  struct task_struct * target,
                                  long type, int mode);
 
         int (*shm_alloc_security) (struct shmid_kernel * shp);
         void (*shm_free_security) (struct shmid_kernel * shp);
         int (*shm_associate) (struct shmid_kernel * shp, int shmflg);
         int (*shm_shmctl) (struct shmid_kernel * shp, int cmd);
         int (*shm_shmat) (struct shmid_kernel * shp, 
                           char __user *shmaddr, int shmflg);
 
         int (*sem_alloc_security) (struct sem_array * sma);
         void (*sem_free_security) (struct sem_array * sma);
         int (*sem_associate) (struct sem_array * sma, int semflg);
         int (*sem_semctl) (struct sem_array * sma, int cmd);
         int (*sem_semop) (struct sem_array * sma, 
                           struct sembuf * sops, unsigned nsops, int alter);
 
         int (*netlink_send) (struct sock * sk, struct sk_buff * skb);
         int (*netlink_recv) (struct sk_buff * skb);
 
         /* allow module stacking */
         int (*register_security) (const char *name,
                                   struct security_operations *ops);
         int (*unregister_security) (const char *name,
                                     struct security_operations *ops);
 
         void (*d_instantiate) (struct dentry *dentry, struct inode *inode);
 
         int (*getprocattr)(struct task_struct *p, char *name, void *value, size_t size);
         int (*setprocattr)(struct task_struct *p, char *name, void *value, size_t size);
 
 #ifdef CONFIG_SECURITY_NETWORK
         int (*unix_stream_connect) (struct socket * sock,
                                     struct socket * other, struct sock * newsk);
         int (*unix_may_send) (struct socket * sock, struct socket * other);
 
         int (*socket_create) (int family, int type, int protocol, int kern);
         void (*socket_post_create) (struct socket * sock, int family,
                                     int type, int protocol, int kern);
         int (*socket_bind) (struct socket * sock,
                             struct sockaddr * address, int addrlen);
         int (*socket_connect) (struct socket * sock,
                                struct sockaddr * address, int addrlen);
         int (*socket_listen) (struct socket * sock, int backlog);
         int (*socket_accept) (struct socket * sock, struct socket * newsock);
         void (*socket_post_accept) (struct socket * sock,
                                     struct socket * newsock);
         int (*socket_sendmsg) (struct socket * sock,
                                struct msghdr * msg, int size);
         int (*socket_recvmsg) (struct socket * sock,
                                struct msghdr * msg, int size, int flags);
         int (*socket_getsockname) (struct socket * sock);
         int (*socket_getpeername) (struct socket * sock);
         int (*socket_getsockopt) (struct socket * sock, int level, int optname);
         int (*socket_setsockopt) (struct socket * sock, int level, int optname);
         int (*socket_shutdown) (struct socket * sock, int how);
         int (*socket_sock_rcv_skb) (struct sock * sk, struct sk_buff * skb);
         int (*socket_getpeersec) (struct socket *sock, char __user *optval, int __user *optlen, unsigned len);
         int (*sk_alloc_security) (struct sock *sk, int family, int priority);
         void (*sk_free_security) (struct sock *sk);
 #endif  /* CONFIG_SECURITY_NETWORK */
 };
 
 /* global variables */
 extern struct security_operations *security_ops;
 
 /* inline stuff */
 static inline int security_ptrace (struct task_struct * parent, struct task_struct * child)
 {
         return security_ops->ptrace (parent, child);
 }
 
 static inline int security_capget (struct task_struct *target,
                                    kernel_cap_t *effective,
                                    kernel_cap_t *inheritable,
                                    kernel_cap_t *permitted)
 {
         return security_ops->capget (target, effective, inheritable, permitted);
 }
 
 static inline int security_capset_check (struct task_struct *target,
                                          kernel_cap_t *effective,
                                          kernel_cap_t *inheritable,
                                          kernel_cap_t *permitted)
 {
         return security_ops->capset_check (target, effective, inheritable, permitted);
 }
 
 static inline void security_capset_set (struct task_struct *target,
                                         kernel_cap_t *effective,
                                         kernel_cap_t *inheritable,
                                         kernel_cap_t *permitted)
 {
         security_ops->capset_set (target, effective, inheritable, permitted);
 }
 
 static inline int security_acct (struct file *file)
 {
         return security_ops->acct (file);
 }
 
 static inline int security_sysctl(struct ctl_table *table, int op)
 {
         return security_ops->sysctl(table, op);
 }
 
 static inline int security_quotactl (int cmds, int type, int id,
                                      struct super_block *sb)
 {
         return security_ops->quotactl (cmds, type, id, sb);
 }
 
 static inline int security_quota_on (struct dentry * dentry)
 {
         return security_ops->quota_on (dentry);
 }
 
 static inline int security_syslog(int type)
 {
         return security_ops->syslog(type);
 }
 
 static inline int security_settime(struct timespec *ts, struct timezone *tz)
 {
         return security_ops->settime(ts, tz);
 }
 
 
 static inline int security_vm_enough_memory(long pages)
 {
         return security_ops->vm_enough_memory(pages);
 }
 
 static inline int security_bprm_alloc (struct linux_binprm *bprm)
 {
         return security_ops->bprm_alloc_security (bprm);
 }
 static inline void security_bprm_free (struct linux_binprm *bprm)
 {
         security_ops->bprm_free_security (bprm);
 }
 static inline void security_bprm_apply_creds (struct linux_binprm *bprm, int unsafe)
 {
         security_ops->bprm_apply_creds (bprm, unsafe);
 }
 static inline void security_bprm_post_apply_creds (struct linux_binprm *bprm)
 {
         security_ops->bprm_post_apply_creds (bprm);
 }
 static inline int security_bprm_set (struct linux_binprm *bprm)
 {
         return security_ops->bprm_set_security (bprm);
 }
 
 static inline int security_bprm_check (struct linux_binprm *bprm)
 {
         return security_ops->bprm_check_security (bprm);
 }
 
 static inline int security_bprm_secureexec (struct linux_binprm *bprm)
 {
         return security_ops->bprm_secureexec (bprm);
 }
 
 static inline int security_sb_alloc (struct super_block *sb)
 {
         return security_ops->sb_alloc_security (sb);
 }
 
 static inline void security_sb_free (struct super_block *sb)
 {
         security_ops->sb_free_security (sb);
 }
 
 static inline int security_sb_copy_data (struct file_system_type *type,
                                          void *orig, void *copy)
 {
         return security_ops->sb_copy_data (type, orig, copy);
 }
 
 static inline int security_sb_kern_mount (struct super_block *sb, void *data)
 {
         return security_ops->sb_kern_mount (sb, data);
 }
 
 static inline int security_sb_statfs (struct super_block *sb)
 {
         return security_ops->sb_statfs (sb);
 }
 
 static inline int security_sb_mount (char *dev_name, struct nameidata *nd,
                                     char *type, unsigned long flags,
                                     void *data)
 {
         return security_ops->sb_mount (dev_name, nd, type, flags, data);
 }
 
 static inline int security_sb_check_sb (struct vfsmount *mnt,
                                         struct nameidata *nd)
 {
         return security_ops->sb_check_sb (mnt, nd);
 }
 
 static inline int security_sb_umount (struct vfsmount *mnt, int flags)
 {
         return security_ops->sb_umount (mnt, flags);
 }
 
 static inline void security_sb_umount_close (struct vfsmount *mnt)
 {
         security_ops->sb_umount_close (mnt);
 }
 
 static inline void security_sb_umount_busy (struct vfsmount *mnt)
 {
         security_ops->sb_umount_busy (mnt);
 }
 
 static inline void security_sb_post_remount (struct vfsmount *mnt,
                                              unsigned long flags, void *data)
 {
         security_ops->sb_post_remount (mnt, flags, data);
 }
 
 static inline void security_sb_post_mountroot (void)
 {
         security_ops->sb_post_mountroot ();
 }
 
 static inline void security_sb_post_addmount (struct vfsmount *mnt,
                                               struct nameidata *mountpoint_nd)
 {
         security_ops->sb_post_addmount (mnt, mountpoint_nd);
 }
 
 static inline int security_sb_pivotroot (struct nameidata *old_nd,
                                          struct nameidata *new_nd)
 {
         return security_ops->sb_pivotroot (old_nd, new_nd);
 }
 
 static inline void security_sb_post_pivotroot (struct nameidata *old_nd,
                                                struct nameidata *new_nd)
 {
         security_ops->sb_post_pivotroot (old_nd, new_nd);
 }
 
 static inline int security_inode_alloc (struct inode *inode)
 {
         return security_ops->inode_alloc_security (inode);
 }
 
 static inline void security_inode_free (struct inode *inode)
 {
         security_ops->inode_free_security (inode);
 }
         
 static inline int security_inode_create (struct inode *dir,
                                          struct dentry *dentry,
                                          int mode)
 {
         return security_ops->inode_create (dir, dentry, mode);
 }
 
 static inline void security_inode_post_create (struct inode *dir,
                                                struct dentry *dentry,
                                                int mode)
 {
         security_ops->inode_post_create (dir, dentry, mode);
 }
 
 static inline int security_inode_link (struct dentry *old_dentry,
                                        struct inode *dir,
                                        struct dentry *new_dentry)
 {
         return security_ops->inode_link (old_dentry, dir, new_dentry);
 }
 
 static inline void security_inode_post_link (struct dentry *old_dentry,
                                              struct inode *dir,
                                              struct dentry *new_dentry)
 {
         security_ops->inode_post_link (old_dentry, dir, new_dentry);
 }
 
 static inline int security_inode_unlink (struct inode *dir,
                                          struct dentry *dentry)
 {
         return security_ops->inode_unlink (dir, dentry);
 }
 
 static inline int security_inode_symlink (struct inode *dir,
                                           struct dentry *dentry,
                                           const char *old_name)
 {
         return security_ops->inode_symlink (dir, dentry, old_name);
 }
 
 static inline void security_inode_post_symlink (struct inode *dir,
                                                 struct dentry *dentry,
                                                 const char *old_name)
 {
         security_ops->inode_post_symlink (dir, dentry, old_name);
 }
 
 static inline int security_inode_mkdir (struct inode *dir,
                                         struct dentry *dentry,
                                         int mode)
 {
         return security_ops->inode_mkdir (dir, dentry, mode);
 }
 
 static inline void security_inode_post_mkdir (struct inode *dir,
                                               struct dentry *dentry,
                                               int mode)
 {
         security_ops->inode_post_mkdir (dir, dentry, mode);
 }
 
 static inline int security_inode_rmdir (struct inode *dir,
                                         struct dentry *dentry)
 {
         return security_ops->inode_rmdir (dir, dentry);
 }
 
 static inline int security_inode_mknod (struct inode *dir,
                                         struct dentry *dentry,
                                         int mode, dev_t dev)
 {
         return security_ops->inode_mknod (dir, dentry, mode, dev);
 }
 
 static inline void security_inode_post_mknod (struct inode *dir,
                                               struct dentry *dentry,
                                               int mode, dev_t dev)
 {
         security_ops->inode_post_mknod (dir, dentry, mode, dev);
 }
 
 static inline int security_inode_rename (struct inode *old_dir,
                                          struct dentry *old_dentry,
                                          struct inode *new_dir,
                                          struct dentry *new_dentry)
 {
         return security_ops->inode_rename (old_dir, old_dentry,
                                            new_dir, new_dentry);
 }
 
 static inline void security_inode_post_rename (struct inode *old_dir,
                                                struct dentry *old_dentry,
                                                struct inode *new_dir,
                                                struct dentry *new_dentry)
 {
         security_ops->inode_post_rename (old_dir, old_dentry,
                                                 new_dir, new_dentry);
 }
 
 static inline int security_inode_readlink (struct dentry *dentry)
 {
         return security_ops->inode_readlink (dentry);
 }
 
 static inline int security_inode_follow_link (struct dentry *dentry,
                                               struct nameidata *nd)
 {
         return security_ops->inode_follow_link (dentry, nd);
 }
 
 static inline int security_inode_permission (struct inode *inode, int mask,
                                              struct nameidata *nd)
 {
         return security_ops->inode_permission (inode, mask, nd);
 }
 
 static inline int security_inode_setattr (struct dentry *dentry,
                                           struct iattr *attr)
 {
         return security_ops->inode_setattr (dentry, attr);
 }
 
 static inline int security_inode_getattr (struct vfsmount *mnt,
                                           struct dentry *dentry)
 {
         return security_ops->inode_getattr (mnt, dentry);
 }
 
 static inline void security_inode_delete (struct inode *inode)
 {
         security_ops->inode_delete (inode);
 }
 
 static inline int security_inode_setxattr (struct dentry *dentry, char *name,
                                            void *value, size_t size, int flags)
 {
         return security_ops->inode_setxattr (dentry, name, value, size, flags);
 }
 
 static inline void security_inode_post_setxattr (struct dentry *dentry, char *name,
                                                 void *value, size_t size, int flags)
 {
         security_ops->inode_post_setxattr (dentry, name, value, size, flags);
 }
 
 static inline int security_inode_getxattr (struct dentry *dentry, char *name)
 {
         return security_ops->inode_getxattr (dentry, name);
 }
 
 static inline int security_inode_listxattr (struct dentry *dentry)
 {
         return security_ops->inode_listxattr (dentry);
 }
 
 static inline int security_inode_removexattr (struct dentry *dentry, char *name)
 {
         return security_ops->inode_removexattr (dentry, name);
 }
 
 static inline int security_inode_getsecurity(struct inode *inode, const char *name, void *buffer, size_t size)
 {
         return security_ops->inode_getsecurity(inode, name, buffer, size);
 }
 
 static inline int security_inode_setsecurity(struct inode *inode, const char *name, const void *value, size_t size, int flags)
 {
         return security_ops->inode_setsecurity(inode, name, value, size, flags);
 }
 
 static inline int security_inode_listsecurity(struct inode *inode, char *buffer, size_t buffer_size)
 {
         return security_ops->inode_listsecurity(inode, buffer, buffer_size);
 }
 
 static inline int security_file_permission (struct file *file, int mask)
 {
         return security_ops->file_permission (file, mask);
 }
 
 static inline int security_file_alloc (struct file *file)
 {
         return security_ops->file_alloc_security (file);
 }
 
 static inline void security_file_free (struct file *file)
 {
         security_ops->file_free_security (file);
 }
 
 static inline int security_file_ioctl (struct file *file, unsigned int cmd,
                                        unsigned long arg)
 {
         return security_ops->file_ioctl (file, cmd, arg);
 }
 
 static inline int security_file_mmap (struct file *file, unsigned long prot,
                                       unsigned long flags)
 {
         return security_ops->file_mmap (file, prot, flags);
 }
 
 static inline int security_file_mprotect (struct vm_area_struct *vma,
                                           unsigned long prot)
 {
         return security_ops->file_mprotect (vma, prot);
 }
 
 static inline int security_file_lock (struct file *file, unsigned int cmd)
 {
         return security_ops->file_lock (file, cmd);
 }
 
 static inline int security_file_fcntl (struct file *file, unsigned int cmd,
                                        unsigned long arg)
 {
         return security_ops->file_fcntl (file, cmd, arg);
 }
 
 static inline int security_file_set_fowner (struct file *file)
 {
         return security_ops->file_set_fowner (file);
 }
 
 static inline int security_file_send_sigiotask (struct task_struct *tsk,
                                                 struct fown_struct *fown,
                                                 int sig)
 {
         return security_ops->file_send_sigiotask (tsk, fown, sig);
 }
 
 static inline int security_file_receive (struct file *file)
 {
         return security_ops->file_receive (file);
 }
 
 static inline int security_task_create (unsigned long clone_flags)
 {
         return security_ops->task_create (clone_flags);
 }
 
 static inline int security_task_alloc (struct task_struct *p)
 {
         return security_ops->task_alloc_security (p);
 }
 
 static inline void security_task_free (struct task_struct *p)
 {
         security_ops->task_free_security (p);
 }
 
 static inline int security_task_setuid (uid_t id0, uid_t id1, uid_t id2,
                                         int flags)
 {
         return security_ops->task_setuid (id0, id1, id2, flags);
 }
 
 static inline int security_task_post_setuid (uid_t old_ruid, uid_t old_euid,
                                              uid_t old_suid, int flags)
 {
         return security_ops->task_post_setuid (old_ruid, old_euid, old_suid, flags);
 }
 
 static inline int security_task_setgid (gid_t id0, gid_t id1, gid_t id2,
                                         int flags)
 {
         return security_ops->task_setgid (id0, id1, id2, flags);
 }
 
 static inline int security_task_setpgid (struct task_struct *p, pid_t pgid)
 {
         return security_ops->task_setpgid (p, pgid);
 }
 
 static inline int security_task_getpgid (struct task_struct *p)
 {
         return security_ops->task_getpgid (p);
 }
 
 static inline int security_task_getsid (struct task_struct *p)
 {
         return security_ops->task_getsid (p);
 }
 
 static inline int security_task_setgroups (struct group_info *group_info)
 {
         return security_ops->task_setgroups (group_info);
 }
 
 static inline int security_task_setnice (struct task_struct *p, int nice)
 {
         return security_ops->task_setnice (p, nice);
 }
 
 static inline int security_task_setrlimit (unsigned int resource,
                                            struct rlimit *new_rlim)
 {
         return security_ops->task_setrlimit (resource, new_rlim);
 }
 
 static inline int security_task_setscheduler (struct task_struct *p,
                                               int policy,
                                               struct sched_param *lp)
 {
         return security_ops->task_setscheduler (p, policy, lp);
 }
 
 static inline int security_task_getscheduler (struct task_struct *p)
 {
         return security_ops->task_getscheduler (p);
 }
 
 static inline int security_task_kill (struct task_struct *p,
                                       struct siginfo *info, int sig)
 {
         return security_ops->task_kill (p, info, sig);
 }
 
 static inline int security_task_wait (struct task_struct *p)
 {
         return security_ops->task_wait (p);
 }
 
 static inline int security_task_prctl (int option, unsigned long arg2,
                                        unsigned long arg3,
                                        unsigned long arg4,
                                        unsigned long arg5)
 {
         return security_ops->task_prctl (option, arg2, arg3, arg4, arg5);
 }
 
 static inline void security_task_reparent_to_init (struct task_struct *p)
 {
         security_ops->task_reparent_to_init (p);
 }
 
 static inline void security_task_to_inode(struct task_struct *p, struct inode *inode)
 {
         security_ops->task_to_inode(p, inode);
 }
 
 static inline int security_ipc_permission (struct kern_ipc_perm *ipcp,
                                            short flag)
 {
         return security_ops->ipc_permission (ipcp, flag);
 }
 
 static inline int security_msg_msg_alloc (struct msg_msg * msg)
 {
         return security_ops->msg_msg_alloc_security (msg);
 }
 
 static inline void security_msg_msg_free (struct msg_msg * msg)
 {
         security_ops->msg_msg_free_security(msg);
 }
 
 static inline int security_msg_queue_alloc (struct msg_queue *msq)
 {
         return security_ops->msg_queue_alloc_security (msq);
 }
 
 static inline void security_msg_queue_free (struct msg_queue *msq)
 {
         security_ops->msg_queue_free_security (msq);
 }
 
 static inline int security_msg_queue_associate (struct msg_queue * msq, 
                                                 int msqflg)
 {
         return security_ops->msg_queue_associate (msq, msqflg);
 }
 
 static inline int security_msg_queue_msgctl (struct msg_queue * msq, int cmd)
 {
         return security_ops->msg_queue_msgctl (msq, cmd);
 }
 
 static inline int security_msg_queue_msgsnd (struct msg_queue * msq,
                                              struct msg_msg * msg, int msqflg)
 {
         return security_ops->msg_queue_msgsnd (msq, msg, msqflg);
 }
 
 static inline int security_msg_queue_msgrcv (struct msg_queue * msq,
                                              struct msg_msg * msg,
                                              struct task_struct * target,
                                              long type, int mode)
 {
         return security_ops->msg_queue_msgrcv (msq, msg, target, type, mode);
 }
 
 static inline int security_shm_alloc (struct shmid_kernel *shp)
 {
         return security_ops->shm_alloc_security (shp);
 }
 
 static inline void security_shm_free (struct shmid_kernel *shp)
 {
         security_ops->shm_free_security (shp);
 }
 
 static inline int security_shm_associate (struct shmid_kernel * shp, 
                                           int shmflg)
 {
         return security_ops->shm_associate(shp, shmflg);
 }
 
 static inline int security_shm_shmctl (struct shmid_kernel * shp, int cmd)
 {
         return security_ops->shm_shmctl (shp, cmd);
 }
 
 static inline int security_shm_shmat (struct shmid_kernel * shp, 
                                       char __user *shmaddr, int shmflg)
 {
         return security_ops->shm_shmat(shp, shmaddr, shmflg);
 }
 
 static inline int security_sem_alloc (struct sem_array *sma)
 {
         return security_ops->sem_alloc_security (sma);
 }
 
 static inline void security_sem_free (struct sem_array *sma)
 {
         security_ops->sem_free_security (sma);
 }
 
 static inline int security_sem_associate (struct sem_array * sma, int semflg)
 {
         return security_ops->sem_associate (sma, semflg);
 }
 
 static inline int security_sem_semctl (struct sem_array * sma, int cmd)
 {
         return security_ops->sem_semctl(sma, cmd);
 }
 
 static inline int security_sem_semop (struct sem_array * sma, 
                                       struct sembuf * sops, unsigned nsops, 
                                       int alter)
 {
         return security_ops->sem_semop(sma, sops, nsops, alter);
 }
 
 static inline void security_d_instantiate (struct dentry *dentry, struct inode *inode)
 {
         security_ops->d_instantiate (dentry, inode);
 }
 
 static inline int security_getprocattr(struct task_struct *p, char *name, void *value, size_t size)
 {
         return security_ops->getprocattr(p, name, value, size);
 }
 
 static inline int security_setprocattr(struct task_struct *p, char *name, void *value, size_t size)
 {
         return security_ops->setprocattr(p, name, value, size);
 }
 
 static inline int security_netlink_send(struct sock *sk, struct sk_buff * skb)
 {
         return security_ops->netlink_send(sk, skb);
 }
 
 static inline int security_netlink_recv(struct sk_buff * skb)
 {
         return security_ops->netlink_recv(skb);
 }
 
 /* prototypes */
 extern int security_init        (void);
 extern int register_security    (struct security_operations *ops);
 extern int unregister_security  (struct security_operations *ops);
 extern int mod_reg_security     (const char *name, struct security_operations *ops);
 extern int mod_unreg_security   (const char *name, struct security_operations *ops);
 
 
 #else /* CONFIG_SECURITY */
 
 /*
  * This is the default capabilities functionality.  Most of these functions
  * are just stubbed out, but a few must call the proper capable code.
  */
 
 static inline int security_init(void)
 {
         return 0;
 }
 
 static inline int security_ptrace (struct task_struct *parent, struct task_struct * child)
 {
         return cap_ptrace (parent, child);
 }
 
 static inline int security_capget (struct task_struct *target,
                                    kernel_cap_t *effective,
                                    kernel_cap_t *inheritable,
                                    kernel_cap_t *permitted)
 {
         return cap_capget (target, effective, inheritable, permitted);
 }
 
 static inline int security_capset_check (struct task_struct *target,
                                          kernel_cap_t *effective,
                                          kernel_cap_t *inheritable,
                                          kernel_cap_t *permitted)
 {
         return cap_capset_check (target, effective, inheritable, permitted);
 }
 
 static inline void security_capset_set (struct task_struct *target,
                                         kernel_cap_t *effective,
                                         kernel_cap_t *inheritable,
                                         kernel_cap_t *permitted)
 {
         cap_capset_set (target, effective, inheritable, permitted);
 }
 
 static inline int security_acct (struct file *file)
 {
         return 0;
 }
 
 static inline int security_sysctl(struct ctl_table *table, int op)
 {
         return 0;
 }
 
 static inline int security_quotactl (int cmds, int type, int id,
                                      struct super_block * sb)
 {
         return 0;
 }
 
 static inline int security_quota_on (struct dentry * dentry)
 {
         return 0;
 }
 
 static inline int security_syslog(int type)
 {
         return cap_syslog(type);
 }
 
 static inline int security_settime(struct timespec *ts, struct timezone *tz)
 {
         return cap_settime(ts, tz);
 }
 
 static inline int security_vm_enough_memory(long pages)
 {
         return cap_vm_enough_memory(pages);
 }
 
 static inline int security_bprm_alloc (struct linux_binprm *bprm)
 {
         return 0;
 }
 
 static inline void security_bprm_free (struct linux_binprm *bprm)
 { }
 
 static inline void security_bprm_apply_creds (struct linux_binprm *bprm, int unsafe)
 { 
         cap_bprm_apply_creds (bprm, unsafe);
 }
 
 static inline void security_bprm_post_apply_creds (struct linux_binprm *bprm)
 {
         return;
 }
 
 static inline int security_bprm_set (struct linux_binprm *bprm)
 {
         return cap_bprm_set_security (bprm);
 }
 
 static inline int security_bprm_check (struct linux_binprm *bprm)
 {
         return 0;
 }
 
 static inline int security_bprm_secureexec (struct linux_binprm *bprm)
 {
         return cap_bprm_secureexec(bprm);
 }
 
 static inline int security_sb_alloc (struct super_block *sb)
 {
         return 0;
 }
 
 static inline void security_sb_free (struct super_block *sb)
 { }
 
 static inline int security_sb_copy_data (struct file_system_type *type,
                                          void *orig, void *copy)
 {
         return 0;
 }
 
 static inline int security_sb_kern_mount (struct super_block *sb, void *data)
 {
         return 0;
 }
 
 static inline int security_sb_statfs (struct super_block *sb)
 {
         return 0;
 }
 
 static inline int security_sb_mount (char *dev_name, struct nameidata *nd,
                                     char *type, unsigned long flags,
                                     void *data)
 {
         return 0;
 }
 
 static inline int security_sb_check_sb (struct vfsmount *mnt,
                                         struct nameidata *nd)
 {
         return 0;
 }
 
 static inline int security_sb_umount (struct vfsmount *mnt, int flags)
 {
         return 0;
 }
 
 static inline void security_sb_umount_close (struct vfsmount *mnt)
 { }
 
 static inline void security_sb_umount_busy (struct vfsmount *mnt)
 { }
 
 static inline void security_sb_post_remount (struct vfsmount *mnt,
                                              unsigned long flags, void *data)
 { }
 
 static inline void security_sb_post_mountroot (void)
 { }
 
 static inline void security_sb_post_addmount (struct vfsmount *mnt,
                                               struct nameidata *mountpoint_nd)
 { }
 
 static inline int security_sb_pivotroot (struct nameidata *old_nd,
                                          struct nameidata *new_nd)
 {
         return 0;
 }
 
 static inline void security_sb_post_pivotroot (struct nameidata *old_nd,
                                                struct nameidata *new_nd)
 { }
 
 static inline int security_inode_alloc (struct inode *inode)
 {
         return 0;
 }
 
 static inline void security_inode_free (struct inode *inode)
 { }
         
 static inline int security_inode_create (struct inode *dir,
                                          struct dentry *dentry,
                                          int mode)
 {
         return 0;
 }
 
 static inline void security_inode_post_create (struct inode *dir,
                                                struct dentry *dentry,
                                                int mode)
 { }
 
 static inline int security_inode_link (struct dentry *old_dentry,
                                        struct inode *dir,
                                        struct dentry *new_dentry)
 {
         return 0;
 }
 
 static inline void security_inode_post_link (struct dentry *old_dentry,
                                              struct inode *dir,
                                              struct dentry *new_dentry)
 { }
 
 static inline int security_inode_unlink (struct inode *dir,
                                          struct dentry *dentry)
 {
         return 0;
 }
 
 static inline int security_inode_symlink (struct inode *dir,
                                           struct dentry *dentry,
                                           const char *old_name)
 {
         return 0;
 }
 
 static inline void security_inode_post_symlink (struct inode *dir,
                                                 struct dentry *dentry,
                                                 const char *old_name)
 { }
 
 static inline int security_inode_mkdir (struct inode *dir,
                                         struct dentry *dentry,
                                         int mode)
 {
         return 0;
 }
 
 static inline void security_inode_post_mkdir (struct inode *dir,
                                               struct dentry *dentry,
                                               int mode)
 { }
 
 static inline int security_inode_rmdir (struct inode *dir,
                                         struct dentry *dentry)
 {
         return 0;
 }
 
 static inline int security_inode_mknod (struct inode *dir,
                                         struct dentry *dentry,
                                         int mode, dev_t dev)
 {
         return 0;
 }
 
 static inline void security_inode_post_mknod (struct inode *dir,
                                               struct dentry *dentry,
                                               int mode, dev_t dev)
 { }
 
 static inline int security_inode_rename (struct inode *old_dir,
                                          struct dentry *old_dentry,
                                          struct inode *new_dir,
                                          struct dentry *new_dentry)
 {
         return 0;
 }
 
 static inline void security_inode_post_rename (struct inode *old_dir,
                                                struct dentry *old_dentry,
                                                struct inode *new_dir,
                                                struct dentry *new_dentry)
 { }
 
 static inline int security_inode_readlink (struct dentry *dentry)
 {
         return 0;
 }
 
 static inline int security_inode_follow_link (struct dentry *dentry,
                                               struct nameidata *nd)
 {
         return 0;
 }
 
 static inline int security_inode_permission (struct inode *inode, int mask,
                                              struct nameidata *nd)
 {
         return 0;
 }
 
 static inline int security_inode_setattr (struct dentry *dentry,
                                           struct iattr *attr)
 {
         return 0;
 }
 
 static inline int security_inode_getattr (struct vfsmount *mnt,
                                           struct dentry *dentry)
 {
         return 0;
 }
 
 static inline void security_inode_delete (struct inode *inode)
 { }
 
 static inline int security_inode_setxattr (struct dentry *dentry, char *name,
                                            void *value, size_t size, int flags)
 {
         return cap_inode_setxattr(dentry, name, value, size, flags);
 }
 
 static inline void security_inode_post_setxattr (struct dentry *dentry, char *name,
                                                  void *value, size_t size, int flags)
 { }
 
 static inline int security_inode_getxattr (struct dentry *dentry, char *name)
 {
         return 0;
 }
 
 static inline int security_inode_listxattr (struct dentry *dentry)
 {
         return 0;
 }
 
 static inline int security_inode_removexattr (struct dentry *dentry, char *name)
 {
         return cap_inode_removexattr(dentry, name);
 }
 
 static inline int security_inode_getsecurity(struct inode *inode, const char *name, void *buffer, size_t size)
 {
         return -EOPNOTSUPP;
 }
 
 static inline int security_inode_setsecurity(struct inode *inode, const char *name, const void *value, size_t size, int flags)
 {
         return -EOPNOTSUPP;
 }
 
 static inline int security_inode_listsecurity(struct inode *inode, char *buffer, size_t buffer_size)
 {
         return 0;
 }
 
 static inline int security_file_permission (struct file *file, int mask)
 {
         return 0;
 }
 
 static inline int security_file_alloc (struct file *file)
 {
         return 0;
 }
 
 static inline void security_file_free (struct file *file)
 { }
 
 static inline int security_file_ioctl (struct file *file, unsigned int cmd,
                                        unsigned long arg)
 {
         return 0;
 }
 
 static inline int security_file_mmap (struct file *file, unsigned long prot,
                                       unsigned long flags)
 {
         return 0;
 }
 
 static inline int security_file_mprotect (struct vm_area_struct *vma,
                                           unsigned long prot)
 {
         return 0;
 }
 
 static inline int security_file_lock (struct file *file, unsigned int cmd)
 {
         return 0;
 }
 
 static inline int security_file_fcntl (struct file *file, unsigned int cmd,
                                        unsigned long arg)
 {
         return 0;
 }
 
 static inline int security_file_set_fowner (struct file *file)
 {
         return 0;
 }
 
 static inline int security_file_send_sigiotask (struct task_struct *tsk,
                                                 struct fown_struct *fown,
                                                 int sig)
 {
         return 0;
 }
 
 static inline int security_file_receive (struct file *file)
 {
         return 0;
 }
 
 static inline int security_task_create (unsigned long clone_flags)
 {
         return 0;
 }
 
 static inline int security_task_alloc (struct task_struct *p)
 {
         return 0;
 }
 
 static inline void security_task_free (struct task_struct *p)
 { }
 
 static inline int security_task_setuid (uid_t id0, uid_t id1, uid_t id2,
                                         int flags)
 {
         return 0;
 }
 
 static inline int security_task_post_setuid (uid_t old_ruid, uid_t old_euid,
                                              uid_t old_suid, int flags)
 {
         return cap_task_post_setuid (old_ruid, old_euid, old_suid, flags);
 }
 
 static inline int security_task_setgid (gid_t id0, gid_t id1, gid_t id2,
                                         int flags)
 {
         return 0;
 }
 
 static inline int security_task_setpgid (struct task_struct *p, pid_t pgid)
 {
         return 0;
 }
 
 static inline int security_task_getpgid (struct task_struct *p)
 {
         return 0;
 }
 
 static inline int security_task_getsid (struct task_struct *p)
 {
         return 0;
 }
 
 static inline int security_task_setgroups (struct group_info *group_info)
 {
         return 0;
 }
 
 static inline int security_task_setnice (struct task_struct *p, int nice)
 {
         return 0;
 }
 
 static inline int security_task_setrlimit (unsigned int resource,
                                            struct rlimit *new_rlim)
 {
         return 0;
 }
 
 static inline int security_task_setscheduler (struct task_struct *p,
                                               int policy,
                                               struct sched_param *lp)
 {
         return 0;
 }
 
 static inline int security_task_getscheduler (struct task_struct *p)
 {
         return 0;
 }
 
 static inline int security_task_kill (struct task_struct *p,
                                       struct siginfo *info, int sig)
 {
         return 0;
 }
 
 static inline int security_task_wait (struct task_struct *p)
 {
         return 0;
 }
 
 static inline int security_task_prctl (int option, unsigned long arg2,
                                        unsigned long arg3,
                                        unsigned long arg4,
                                        unsigned long arg5)
 {
         return 0;
 }
 
 static inline void security_task_reparent_to_init (struct task_struct *p)
 {
         cap_task_reparent_to_init (p);
 }
 
 static inline void security_task_to_inode(struct task_struct *p, struct inode *inode)
 { }
 
 static inline int security_ipc_permission (struct kern_ipc_perm *ipcp,
                                            short flag)
 {
         return 0;
 }
 
 static inline int security_msg_msg_alloc (struct msg_msg * msg)
 {
         return 0;
 }
 
 static inline void security_msg_msg_free (struct msg_msg * msg)
 { }
 
 static inline int security_msg_queue_alloc (struct msg_queue *msq)
 {
         return 0;
 }
 
 static inline void security_msg_queue_free (struct msg_queue *msq)
 { }
 
 static inline int security_msg_queue_associate (struct msg_queue * msq, 
                                                 int msqflg)
 {
         return 0;
 }
 
 static inline int security_msg_queue_msgctl (struct msg_queue * msq, int cmd)
 {
         return 0;
 }
 
 static inline int security_msg_queue_msgsnd (struct msg_queue * msq,
                                              struct msg_msg * msg, int msqflg)
 {
         return 0;
 }
 
 static inline int security_msg_queue_msgrcv (struct msg_queue * msq,
                                              struct msg_msg * msg,
                                              struct task_struct * target,
                                              long type, int mode)
 {
         return 0;
 }
 
 static inline int security_shm_alloc (struct shmid_kernel *shp)
 {
         return 0;
 }
 
 static inline void security_shm_free (struct shmid_kernel *shp)
 { }
 
 static inline int security_shm_associate (struct shmid_kernel * shp, 
                                           int shmflg)
 {
         return 0;
 }
 
 static inline int security_shm_shmctl (struct shmid_kernel * shp, int cmd)
 {
         return 0;
 }
 
 static inline int security_shm_shmat (struct shmid_kernel * shp, 
                                       char __user *shmaddr, int shmflg)
 {
         return 0;
 }
 
 static inline int security_sem_alloc (struct sem_array *sma)
 {
         return 0;
 }
 
 static inline void security_sem_free (struct sem_array *sma)
 { }
 
 static inline int security_sem_associate (struct sem_array * sma, int semflg)
 {
         return 0;
 }
 
 static inline int security_sem_semctl (struct sem_array * sma, int cmd)
 {
         return 0;
 }
 
 static inline int security_sem_semop (struct sem_array * sma, 
                                       struct sembuf * sops, unsigned nsops, 
                                       int alter)
 {
         return 0;
 }
 
 static inline void security_d_instantiate (struct dentry *dentry, struct inode *inode)
 { }
 
 static inline int security_getprocattr(struct task_struct *p, char *name, void *value, size_t size)
 {
         return -EINVAL;
 }
 
 static inline int security_setprocattr(struct task_struct *p, char *name, void *value, size_t size)
 {
         return -EINVAL;
 }
 
 static inline int security_netlink_send (struct sock *sk, struct sk_buff *skb)
 {
         return cap_netlink_send (sk, skb);
 }
 
 static inline int security_netlink_recv (struct sk_buff *skb)
 {
         return cap_netlink_recv (skb);
 }
 
 #endif  /* CONFIG_SECURITY */
 
 #ifdef CONFIG_SECURITY_NETWORK
 static inline int security_unix_stream_connect(struct socket * sock,
                                                struct socket * other, 
                                                struct sock * newsk)
 {
         return security_ops->unix_stream_connect(sock, other, newsk);
 }
 
 
 static inline int security_unix_may_send(struct socket * sock, 
                                          struct socket * other)
 {
         return security_ops->unix_may_send(sock, other);
 }
 
 static inline int security_socket_create (int family, int type,
                                           int protocol, int kern)
 {
         return security_ops->socket_create(family, type, protocol, kern);
 }
 
 static inline void security_socket_post_create(struct socket * sock, 
                                                int family,
                                                int type, 
                                                int protocol, int kern)
 {
         security_ops->socket_post_create(sock, family, type,
                                          protocol, kern);
 }
 
 static inline int security_socket_bind(struct socket * sock, 
                                        struct sockaddr * address, 
                                        int addrlen)
 {
         return security_ops->socket_bind(sock, address, addrlen);
 }
 
 static inline int security_socket_connect(struct socket * sock, 
                                           struct sockaddr * address, 
                                           int addrlen)
 {
         return security_ops->socket_connect(sock, address, addrlen);
 }
 
 static inline int security_socket_listen(struct socket * sock, int backlog)
 {
         return security_ops->socket_listen(sock, backlog);
 }
 
 static inline int security_socket_accept(struct socket * sock, 
                                          struct socket * newsock)
 {
         return security_ops->socket_accept(sock, newsock);
 }
 
 static inline void security_socket_post_accept(struct socket * sock, 
                                                struct socket * newsock)
 {
         security_ops->socket_post_accept(sock, newsock);
 }
 
 static inline int security_socket_sendmsg(struct socket * sock, 
                                           struct msghdr * msg, int size)
 {
         return security_ops->socket_sendmsg(sock, msg, size);
 }
 
 static inline int security_socket_recvmsg(struct socket * sock, 
                                           struct msghdr * msg, int size, 
                                           int flags)
 {
         return security_ops->socket_recvmsg(sock, msg, size, flags);
 }
 
 static inline int security_socket_getsockname(struct socket * sock)
 {
         return security_ops->socket_getsockname(sock);
 }
 
 static inline int security_socket_getpeername(struct socket * sock)
 {
         return security_ops->socket_getpeername(sock);
 }
 
 static inline int security_socket_getsockopt(struct socket * sock, 
                                              int level, int optname)
 {
         return security_ops->socket_getsockopt(sock, level, optname);
 }
 
 static inline int security_socket_setsockopt(struct socket * sock, 
                                              int level, int optname)
 {
         return security_ops->socket_setsockopt(sock, level, optname);
 }
 
 static inline int security_socket_shutdown(struct socket * sock, int how)
 {
         return security_ops->socket_shutdown(sock, how);
 }
 
 static inline int security_sock_rcv_skb (struct sock * sk, 
                                          struct sk_buff * skb)
 {
         return security_ops->socket_sock_rcv_skb (sk, skb);
 }
 
 static inline int security_socket_getpeersec(struct socket *sock, char __user *optval,
                                              int __user *optlen, unsigned len)
 {
         return security_ops->socket_getpeersec(sock, optval, optlen, len);
 }
 
 static inline int security_sk_alloc(struct sock *sk, int family, int priority)
 {
         return security_ops->sk_alloc_security(sk, family, priority);
 }
 
 static inline void security_sk_free(struct sock *sk)
 {
         return security_ops->sk_free_security(sk);
 }
 #else   /* CONFIG_SECURITY_NETWORK */
 static inline int security_unix_stream_connect(struct socket * sock,
                                                struct socket * other, 
                                                struct sock * newsk)
 {
         return 0;
 }
 
 static inline int security_unix_may_send(struct socket * sock, 
                                          struct socket * other)
 {
         return 0;
 }
 
 static inline int security_socket_create (int family, int type,
                                           int protocol, int kern)
 {
         return 0;
 }
 
 static inline void security_socket_post_create(struct socket * sock, 
                                                int family,
                                                int type, 
                                                int protocol, int kern)
 {
 }
 
 static inline int security_socket_bind(struct socket * sock, 
                                        struct sockaddr * address, 
                                        int addrlen)
 {
         return 0;
 }
 
 static inline int security_socket_connect(struct socket * sock, 
                                           struct sockaddr * address, 
                                           int addrlen)
 {
         return 0;
 }
 
 static inline int security_socket_listen(struct socket * sock, int backlog)
 {
         return 0;
 }
 
 static inline int security_socket_accept(struct socket * sock, 
                                          struct socket * newsock)
 {
         return 0;
 }
 
 static inline void security_socket_post_accept(struct socket * sock, 
                                                struct socket * newsock)
 {
 }
 
 static inline int security_socket_sendmsg(struct socket * sock, 
                                           struct msghdr * msg, int size)
 {
         return 0;
 }
 
 static inline int security_socket_recvmsg(struct socket * sock, 
                                           struct msghdr * msg, int size, 
                                           int flags)
 {
         return 0;
 }
 
 static inline int security_socket_getsockname(struct socket * sock)
 {
         return 0;
 }
 
 static inline int security_socket_getpeername(struct socket * sock)
 {
         return 0;
 }
 
 static inline int security_socket_getsockopt(struct socket * sock, 
                                              int level, int optname)
 {
         return 0;
 }
 
 static inline int security_socket_setsockopt(struct socket * sock, 
                                              int level, int optname)
 {
         return 0;
 }
 
 static inline int security_socket_shutdown(struct socket * sock, int how)
 {
         return 0;
 }
 static inline int security_sock_rcv_skb (struct sock * sk, 
                                          struct sk_buff * skb)
 {
         return 0;
 }
 
 static inline int security_socket_getpeersec(struct socket *sock, char __user *optval,
                                              int __user *optlen, unsigned len)
 {
         return -ENOPROTOOPT;
 }
 
 static inline int security_sk_alloc(struct sock *sk, int family, int priority)
 {
         return 0;
 }
 
 static inline void security_sk_free(struct sock *sk)
 {
 }
 #endif  /* CONFIG_SECURITY_NETWORK */
 
 #endif /* ! __LINUX_SECURITY_H */