linux/include/linux/security.h
<<
>>
Prefs
   1/*
   2 * Linux Security plug
   3 *
   4 * Copyright (C) 2001 WireX Communications, Inc <chris@wirex.com>
   5 * Copyright (C) 2001 Greg Kroah-Hartman <greg@kroah.com>
   6 * Copyright (C) 2001 Networks Associates Technology, Inc <ssmalley@nai.com>
   7 * Copyright (C) 2001 James Morris <jmorris@intercode.com.au>
   8 * Copyright (C) 2001 Silicon Graphics, Inc. (Trust Technology Group)
   9 *
  10 *      This program is free software; you can redistribute it and/or modify
  11 *      it under the terms of the GNU General Public License as published by
  12 *      the Free Software Foundation; either version 2 of the License, or
  13 *      (at your option) any later version.
  14 *
  15 *      Due to this file being licensed under the GPL there is controversy over
  16 *      whether this permits you to write a module that #includes this file
  17 *      without placing your module under the GPL.  Please consult a lawyer for
  18 *      advice before doing this.
  19 *
  20 */
  21
  22#ifndef __LINUX_SECURITY_H
  23#define __LINUX_SECURITY_H
  24
  25#include <linux/fs.h>
  26#include <linux/binfmts.h>
  27#include <linux/signal.h>
  28#include <linux/resource.h>
  29#include <linux/sem.h>
  30#include <linux/shm.h>
  31#include <linux/mm.h> /* PAGE_ALIGN */
  32#include <linux/msg.h>
  33#include <linux/sched.h>
  34#include <linux/key.h>
  35#include <linux/xfrm.h>
  36#include <linux/gfp.h>
  37#include <net/flow.h>
  38
  39/* Maximum number of letters for an LSM name string */
  40#define SECURITY_NAME_MAX       10
  41
  42/* If capable should audit the security request */
  43#define SECURITY_CAP_NOAUDIT 0
  44#define SECURITY_CAP_AUDIT 1
  45
  46struct ctl_table;
  47struct audit_krule;
  48
  49/*
  50 * These functions are in security/capability.c and are used
  51 * as the default capabilities functions
  52 */
  53extern int cap_capable(struct task_struct *tsk, const struct cred *cred,
  54                       int cap, int audit);
  55extern int cap_settime(struct timespec *ts, struct timezone *tz);
  56extern int cap_ptrace_access_check(struct task_struct *child, unsigned int mode);
  57extern int cap_ptrace_traceme(struct task_struct *parent);
  58extern int cap_capget(struct task_struct *target, kernel_cap_t *effective, kernel_cap_t *inheritable, kernel_cap_t *permitted);
  59extern int cap_capset(struct cred *new, const struct cred *old,
  60                      const kernel_cap_t *effective,
  61                      const kernel_cap_t *inheritable,
  62                      const kernel_cap_t *permitted);
  63extern int cap_bprm_set_creds(struct linux_binprm *bprm);
  64extern int cap_bprm_secureexec(struct linux_binprm *bprm);
  65extern int cap_inode_setxattr(struct dentry *dentry, const char *name,
  66                              const void *value, size_t size, int flags);
  67extern int cap_inode_removexattr(struct dentry *dentry, const char *name);
  68extern int cap_inode_need_killpriv(struct dentry *dentry);
  69extern int cap_inode_killpriv(struct dentry *dentry);
  70extern int cap_file_mmap(struct file *file, unsigned long reqprot,
  71                         unsigned long prot, unsigned long flags,
  72                         unsigned long addr, unsigned long addr_only);
  73extern int cap_task_fix_setuid(struct cred *new, const struct cred *old, int flags);
  74extern int cap_task_prctl(int option, unsigned long arg2, unsigned long arg3,
  75                          unsigned long arg4, unsigned long arg5);
  76extern int cap_task_setscheduler(struct task_struct *p, int policy, struct sched_param *lp);
  77extern int cap_task_setioprio(struct task_struct *p, int ioprio);
  78extern int cap_task_setnice(struct task_struct *p, int nice);
  79extern int cap_syslog(int type);
  80extern int cap_vm_enough_memory(struct mm_struct *mm, long pages);
  81
  82struct msghdr;
  83struct sk_buff;
  84struct sock;
  85struct sockaddr;
  86struct socket;
  87struct flowi;
  88struct dst_entry;
  89struct xfrm_selector;
  90struct xfrm_policy;
  91struct xfrm_state;
  92struct xfrm_user_sec_ctx;
  93struct seq_file;
  94
  95extern int cap_netlink_send(struct sock *sk, struct sk_buff *skb);
  96extern int cap_netlink_recv(struct sk_buff *skb, int cap);
  97
  98extern unsigned long mmap_min_addr;
  99extern unsigned long dac_mmap_min_addr;
 100/*
 101 * Values used in the task_security_ops calls
 102 */
 103/* setuid or setgid, id0 == uid or gid */
 104#define LSM_SETID_ID    1
 105
 106/* setreuid or setregid, id0 == real, id1 == eff */
 107#define LSM_SETID_RE    2
 108
 109/* setresuid or setresgid, id0 == real, id1 == eff, uid2 == saved */
 110#define LSM_SETID_RES   4
 111
 112/* setfsuid or setfsgid, id0 == fsuid or fsgid */
 113#define LSM_SETID_FS    8
 114
 115/* forward declares to avoid warnings */
 116struct sched_param;
 117struct request_sock;
 118
 119/* bprm->unsafe reasons */
 120#define LSM_UNSAFE_SHARE        1
 121#define LSM_UNSAFE_PTRACE       2
 122#define LSM_UNSAFE_PTRACE_CAP   4
 123
 124/*
 125 * If a hint addr is less than mmap_min_addr change hint to be as
 126 * low as possible but still greater than mmap_min_addr
 127 */
 128static inline unsigned long round_hint_to_min(unsigned long hint)
 129{
 130        hint &= PAGE_MASK;
 131        if (((void *)hint != NULL) &&
 132            (hint < mmap_min_addr))
 133                return PAGE_ALIGN(mmap_min_addr);
 134        return hint;
 135}
 136extern int mmap_min_addr_handler(struct ctl_table *table, int write,
 137                                 void __user *buffer, size_t *lenp, loff_t *ppos);
 138
 139#ifdef CONFIG_SECURITY
 140
 141struct security_mnt_opts {
 142        char **mnt_opts;
 143        int *mnt_opts_flags;
 144        int num_mnt_opts;
 145};
 146
 147static inline void security_init_mnt_opts(struct security_mnt_opts *opts)
 148{
 149        opts->mnt_opts = NULL;
 150        opts->mnt_opts_flags = NULL;
 151        opts->num_mnt_opts = 0;
 152}
 153
 154static inline void security_free_mnt_opts(struct security_mnt_opts *opts)
 155{
 156        int i;
 157        if (opts->mnt_opts)
 158                for (i = 0; i < opts->num_mnt_opts; i++)
 159                        kfree(opts->mnt_opts[i]);
 160        kfree(opts->mnt_opts);
 161        opts->mnt_opts = NULL;
 162        kfree(opts->mnt_opts_flags);
 163        opts->mnt_opts_flags = NULL;
 164        opts->num_mnt_opts = 0;
 165}
 166
 167/**
 168 * struct security_operations - main security structure
 169 *
 170 * Security module identifier.
 171 *
 172 * @name:
 173 *      A string that acts as a unique identifeir for the LSM with max number
 174 *      of characters = SECURITY_NAME_MAX.
 175 *
 176 * Security hooks for program execution operations.
 177 *
 178 * @bprm_set_creds:
 179 *      Save security information in the bprm->security field, typically based
 180 *      on information about the bprm->file, for later use by the apply_creds
 181 *      hook.  This hook may also optionally check permissions (e.g. for
 182 *      transitions between security domains).
 183 *      This hook may be called multiple times during a single execve, e.g. for
 184 *      interpreters.  The hook can tell whether it has already been called by
 185 *      checking to see if @bprm->security is non-NULL.  If so, then the hook
 186 *      may decide either to retain the security information saved earlier or
 187 *      to replace it.
 188 *      @bprm contains the linux_binprm structure.
 189 *      Return 0 if the hook is successful and permission is granted.
 190 * @bprm_check_security:
 191 *      This hook mediates the point when a search for a binary handler will
 192 *      begin.  It allows a check the @bprm->security value which is set in the
 193 *      preceding set_creds call.  The primary difference from set_creds is
 194 *      that the argv list and envp list are reliably available in @bprm.  This
 195 *      hook may be called multiple times during a single execve; and in each
 196 *      pass set_creds is called first.
 197 *      @bprm contains the linux_binprm structure.
 198 *      Return 0 if the hook is successful and permission is granted.
 199 * @bprm_committing_creds:
 200 *      Prepare to install the new security attributes of a process being
 201 *      transformed by an execve operation, based on the old credentials
 202 *      pointed to by @current->cred and the information set in @bprm->cred by
 203 *      the bprm_set_creds hook.  @bprm points to the linux_binprm structure.
 204 *      This hook is a good place to perform state changes on the process such
 205 *      as closing open file descriptors to which access will no longer be
 206 *      granted when the attributes are changed.  This is called immediately
 207 *      before commit_creds().
 208 * @bprm_committed_creds:
 209 *      Tidy up after the installation of the new security attributes of a
 210 *      process being transformed by an execve operation.  The new credentials
 211 *      have, by this point, been set to @current->cred.  @bprm points to the
 212 *      linux_binprm structure.  This hook is a good place to perform state
 213 *      changes on the process such as clearing out non-inheritable signal
 214 *      state.  This is called immediately after commit_creds().
 215 * @bprm_secureexec:
 216 *      Return a boolean value (0 or 1) indicating whether a "secure exec"
 217 *      is required.  The flag is passed in the auxiliary table
 218 *      on the initial stack to the ELF interpreter to indicate whether libc
 219 *      should enable secure mode.
 220 *      @bprm contains the linux_binprm structure.
 221 *
 222 * Security hooks for filesystem operations.
 223 *
 224 * @sb_alloc_security:
 225 *      Allocate and attach a security structure to the sb->s_security field.
 226 *      The s_security field is initialized to NULL when the structure is
 227 *      allocated.
 228 *      @sb contains the super_block structure to be modified.
 229 *      Return 0 if operation was successful.
 230 * @sb_free_security:
 231 *      Deallocate and clear the sb->s_security field.
 232 *      @sb contains the super_block structure to be modified.
 233 * @sb_statfs:
 234 *      Check permission before obtaining filesystem statistics for the @mnt
 235 *      mountpoint.
 236 *      @dentry is a handle on the superblock for the filesystem.
 237 *      Return 0 if permission is granted.
 238 * @sb_mount:
 239 *      Check permission before an object specified by @dev_name is mounted on
 240 *      the mount point named by @nd.  For an ordinary mount, @dev_name
 241 *      identifies a device if the file system type requires a device.  For a
 242 *      remount (@flags & MS_REMOUNT), @dev_name is irrelevant.  For a
 243 *      loopback/bind mount (@flags & MS_BIND), @dev_name identifies the
 244 *      pathname of the object being mounted.
 245 *      @dev_name contains the name for object being mounted.
 246 *      @path contains the path for mount point object.
 247 *      @type contains the filesystem type.
 248 *      @flags contains the mount flags.
 249 *      @data contains the filesystem-specific data.
 250 *      Return 0 if permission is granted.
 251 * @sb_copy_data:
 252 *      Allow mount option data to be copied prior to parsing by the filesystem,
 253 *      so that the security module can extract security-specific mount
 254 *      options cleanly (a filesystem may modify the data e.g. with strsep()).
 255 *      This also allows the original mount data to be stripped of security-
 256 *      specific options to avoid having to make filesystems aware of them.
 257 *      @type the type of filesystem being mounted.
 258 *      @orig the original mount data copied from userspace.
 259 *      @copy copied data which will be passed to the security module.
 260 *      Returns 0 if the copy was successful.
 261 * @sb_check_sb:
 262 *      Check permission before the device with superblock @mnt->sb is mounted
 263 *      on the mount point named by @nd.
 264 *      @mnt contains the vfsmount for device being mounted.
 265 *      @path contains the path for the mount point.
 266 *      Return 0 if permission is granted.
 267 * @sb_umount:
 268 *      Check permission before the @mnt file system is unmounted.
 269 *      @mnt contains the mounted file system.
 270 *      @flags contains the unmount flags, e.g. MNT_FORCE.
 271 *      Return 0 if permission is granted.
 272 * @sb_umount_close:
 273 *      Close any files in the @mnt mounted filesystem that are held open by
 274 *      the security module.  This hook is called during an umount operation
 275 *      prior to checking whether the filesystem is still busy.
 276 *      @mnt contains the mounted filesystem.
 277 * @sb_umount_busy:
 278 *      Handle a failed umount of the @mnt mounted filesystem, e.g.  re-opening
 279 *      any files that were closed by umount_close.  This hook is called during
 280 *      an umount operation if the umount fails after a call to the
 281 *      umount_close hook.
 282 *      @mnt contains the mounted filesystem.
 283 * @sb_post_remount:
 284 *      Update the security module's state when a filesystem is remounted.
 285 *      This hook is only called if the remount was successful.
 286 *      @mnt contains the mounted file system.
 287 *      @flags contains the new filesystem flags.
 288 *      @data contains the filesystem-specific data.
 289 * @sb_post_addmount:
 290 *      Update the security module's state when a filesystem is mounted.
 291 *      This hook is called any time a mount is successfully grafetd to
 292 *      the tree.
 293 *      @mnt contains the mounted filesystem.
 294 *      @mountpoint contains the path for the mount point.
 295 * @sb_pivotroot:
 296 *      Check permission before pivoting the root filesystem.
 297 *      @old_path contains the path for the new location of the current root (put_old).
 298 *      @new_path contains the path for the new root (new_root).
 299 *      Return 0 if permission is granted.
 300 * @sb_post_pivotroot:
 301 *      Update module state after a successful pivot.
 302 *      @old_path contains the path for the old root.
 303 *      @new_path contains the path for the new root.
 304 * @sb_set_mnt_opts:
 305 *      Set the security relevant mount options used for a superblock
 306 *      @sb the superblock to set security mount options for
 307 *      @opts binary data structure containing all lsm mount data
 308 * @sb_clone_mnt_opts:
 309 *      Copy all security options from a given superblock to another
 310 *      @oldsb old superblock which contain information to clone
 311 *      @newsb new superblock which needs filled in
 312 * @sb_parse_opts_str:
 313 *      Parse a string of security data filling in the opts structure
 314 *      @options string containing all mount options known by the LSM
 315 *      @opts binary data structure usable by the LSM
 316 *
 317 * Security hooks for inode operations.
 318 *
 319 * @inode_alloc_security:
 320 *      Allocate and attach a security structure to @inode->i_security.  The
 321 *      i_security field is initialized to NULL when the inode structure is
 322 *      allocated.
 323 *      @inode contains the inode structure.
 324 *      Return 0 if operation was successful.
 325 * @inode_free_security:
 326 *      @inode contains the inode structure.
 327 *      Deallocate the inode security structure and set @inode->i_security to
 328 *      NULL.
 329 * @inode_init_security:
 330 *      Obtain the security attribute name suffix and value to set on a newly
 331 *      created inode and set up the incore security field for the new inode.
 332 *      This hook is called by the fs code as part of the inode creation
 333 *      transaction and provides for atomic labeling of the inode, unlike
 334 *      the post_create/mkdir/... hooks called by the VFS.  The hook function
 335 *      is expected to allocate the name and value via kmalloc, with the caller
 336 *      being responsible for calling kfree after using them.
 337 *      If the security module does not use security attributes or does
 338 *      not wish to put a security attribute on this particular inode,
 339 *      then it should return -EOPNOTSUPP to skip this processing.
 340 *      @inode contains the inode structure of the newly created inode.
 341 *      @dir contains the inode structure of the parent directory.
 342 *      @name will be set to the allocated name suffix (e.g. selinux).
 343 *      @value will be set to the allocated attribute value.
 344 *      @len will be set to the length of the value.
 345 *      Returns 0 if @name and @value have been successfully set,
 346 *              -EOPNOTSUPP if no security attribute is needed, or
 347 *              -ENOMEM on memory allocation failure.
 348 * @inode_create:
 349 *      Check permission to create a regular file.
 350 *      @dir contains inode structure of the parent of the new file.
 351 *      @dentry contains the dentry structure for the file to be created.
 352 *      @mode contains the file mode of the file to be created.
 353 *      Return 0 if permission is granted.
 354 * @inode_link:
 355 *      Check permission before creating a new hard link to a file.
 356 *      @old_dentry contains the dentry structure for an existing link to the file.
 357 *      @dir contains the inode structure of the parent directory of the new link.
 358 *      @new_dentry contains the dentry structure for the new link.
 359 *      Return 0 if permission is granted.
 360 * @path_link:
 361 *      Check permission before creating a new hard link to a file.
 362 *      @old_dentry contains the dentry structure for an existing link
 363 *      to the file.
 364 *      @new_dir contains the path structure of the parent directory of
 365 *      the new link.
 366 *      @new_dentry contains the dentry structure for the new link.
 367 *      Return 0 if permission is granted.
 368 * @inode_unlink:
 369 *      Check the permission to remove a hard link to a file.
 370 *      @dir contains the inode structure of parent directory of the file.
 371 *      @dentry contains the dentry structure for file to be unlinked.
 372 *      Return 0 if permission is granted.
 373 * @path_unlink:
 374 *      Check the permission to remove a hard link to a file.
 375 *      @dir contains the path structure of parent directory of the file.
 376 *      @dentry contains the dentry structure for file to be unlinked.
 377 *      Return 0 if permission is granted.
 378 * @inode_symlink:
 379 *      Check the permission to create a symbolic link to a file.
 380 *      @dir contains the inode structure of parent directory of the symbolic link.
 381 *      @dentry contains the dentry structure of the symbolic link.
 382 *      @old_name contains the pathname of file.
 383 *      Return 0 if permission is granted.
 384 * @path_symlink:
 385 *      Check the permission to create a symbolic link to a file.
 386 *      @dir contains the path structure of parent directory of
 387 *      the symbolic link.
 388 *      @dentry contains the dentry structure of the symbolic link.
 389 *      @old_name contains the pathname of file.
 390 *      Return 0 if permission is granted.
 391 * @inode_mkdir:
 392 *      Check permissions to create a new directory in the existing directory
 393 *      associated with inode strcture @dir.
 394 *      @dir containst the inode structure of parent of the directory to be created.
 395 *      @dentry contains the dentry structure of new directory.
 396 *      @mode contains the mode of new directory.
 397 *      Return 0 if permission is granted.
 398 * @path_mkdir:
 399 *      Check permissions to create a new directory in the existing directory
 400 *      associated with path strcture @path.
 401 *      @dir containst the path structure of parent of the directory
 402 *      to be created.
 403 *      @dentry contains the dentry structure of new directory.
 404 *      @mode contains the mode of new directory.
 405 *      Return 0 if permission is granted.
 406 * @inode_rmdir:
 407 *      Check the permission to remove a directory.
 408 *      @dir contains the inode structure of parent of the directory to be removed.
 409 *      @dentry contains the dentry structure of directory to be removed.
 410 *      Return 0 if permission is granted.
 411 * @path_rmdir:
 412 *      Check the permission to remove a directory.
 413 *      @dir contains the path structure of parent of the directory to be
 414 *      removed.
 415 *      @dentry contains the dentry structure of directory to be removed.
 416 *      Return 0 if permission is granted.
 417 * @inode_mknod:
 418 *      Check permissions when creating a special file (or a socket or a fifo
 419 *      file created via the mknod system call).  Note that if mknod operation
 420 *      is being done for a regular file, then the create hook will be called
 421 *      and not this hook.
 422 *      @dir contains the inode structure of parent of the new file.
 423 *      @dentry contains the dentry structure of the new file.
 424 *      @mode contains the mode of the new file.
 425 *      @dev contains the device number.
 426 *      Return 0 if permission is granted.
 427 * @path_mknod:
 428 *      Check permissions when creating a file. Note that this hook is called
 429 *      even if mknod operation is being done for a regular file.
 430 *      @dir contains the path structure of parent of the new file.
 431 *      @dentry contains the dentry structure of the new file.
 432 *      @mode contains the mode of the new file.
 433 *      @dev contains the undecoded device number. Use new_decode_dev() to get
 434 *      the decoded device number.
 435 *      Return 0 if permission is granted.
 436 * @inode_rename:
 437 *      Check for permission to rename a file or directory.
 438 *      @old_dir contains the inode structure for parent of the old link.
 439 *      @old_dentry contains the dentry structure of the old link.
 440 *      @new_dir contains the inode structure for parent of the new link.
 441 *      @new_dentry contains the dentry structure of the new link.
 442 *      Return 0 if permission is granted.
 443 * @path_rename:
 444 *      Check for permission to rename a file or directory.
 445 *      @old_dir contains the path structure for parent of the old link.
 446 *      @old_dentry contains the dentry structure of the old link.
 447 *      @new_dir contains the path structure for parent of the new link.
 448 *      @new_dentry contains the dentry structure of the new link.
 449 *      Return 0 if permission is granted.
 450 * @inode_readlink:
 451 *      Check the permission to read the symbolic link.
 452 *      @dentry contains the dentry structure for the file link.
 453 *      Return 0 if permission is granted.
 454 * @inode_follow_link:
 455 *      Check permission to follow a symbolic link when looking up a pathname.
 456 *      @dentry contains the dentry structure for the link.
 457 *      @nd contains the nameidata structure for the parent directory.
 458 *      Return 0 if permission is granted.
 459 * @inode_permission:
 460 *      Check permission before accessing an inode.  This hook is called by the
 461 *      existing Linux permission function, so a security module can use it to
 462 *      provide additional checking for existing Linux permission checks.
 463 *      Notice that this hook is called when a file is opened (as well as many
 464 *      other operations), whereas the file_security_ops permission hook is
 465 *      called when the actual read/write operations are performed.
 466 *      @inode contains the inode structure to check.
 467 *      @mask contains the permission mask.
 468 *      @nd contains the nameidata (may be NULL).
 469 *      Return 0 if permission is granted.
 470 * @inode_setattr:
 471 *      Check permission before setting file attributes.  Note that the kernel
 472 *      call to notify_change is performed from several locations, whenever
 473 *      file attributes change (such as when a file is truncated, chown/chmod
 474 *      operations, transferring disk quotas, etc).
 475 *      @dentry contains the dentry structure for the file.
 476 *      @attr is the iattr structure containing the new file attributes.
 477 *      Return 0 if permission is granted.
 478 * @path_truncate:
 479 *      Check permission before truncating a file.
 480 *      @path contains the path structure for the file.
 481 *      @length is the new length of the file.
 482 *      @time_attrs is the flags passed to do_truncate().
 483 *      Return 0 if permission is granted.
 484 * @inode_getattr:
 485 *      Check permission before obtaining file attributes.
 486 *      @mnt is the vfsmount where the dentry was looked up
 487 *      @dentry contains the dentry structure for the file.
 488 *      Return 0 if permission is granted.
 489 * @inode_delete:
 490 *      @inode contains the inode structure for deleted inode.
 491 *      This hook is called when a deleted inode is released (i.e. an inode
 492 *      with no hard links has its use count drop to zero).  A security module
 493 *      can use this hook to release any persistent label associated with the
 494 *      inode.
 495 * @inode_setxattr:
 496 *      Check permission before setting the extended attributes
 497 *      @value identified by @name for @dentry.
 498 *      Return 0 if permission is granted.
 499 * @inode_post_setxattr:
 500 *      Update inode security field after successful setxattr operation.
 501 *      @value identified by @name for @dentry.
 502 * @inode_getxattr:
 503 *      Check permission before obtaining the extended attributes
 504 *      identified by @name for @dentry.
 505 *      Return 0 if permission is granted.
 506 * @inode_listxattr:
 507 *      Check permission before obtaining the list of extended attribute
 508 *      names for @dentry.
 509 *      Return 0 if permission is granted.
 510 * @inode_removexattr:
 511 *      Check permission before removing the extended attribute
 512 *      identified by @name for @dentry.
 513 *      Return 0 if permission is granted.
 514 * @inode_getsecurity:
 515 *      Retrieve a copy of the extended attribute representation of the
 516 *      security label associated with @name for @inode via @buffer.  Note that
 517 *      @name is the remainder of the attribute name after the security prefix
 518 *      has been removed. @alloc is used to specify of the call should return a
 519 *      value via the buffer or just the value length Return size of buffer on
 520 *      success.
 521 * @inode_setsecurity:
 522 *      Set the security label associated with @name for @inode from the
 523 *      extended attribute value @value.  @size indicates the size of the
 524 *      @value in bytes.  @flags may be XATTR_CREATE, XATTR_REPLACE, or 0.
 525 *      Note that @name is the remainder of the attribute name after the
 526 *      security. prefix has been removed.
 527 *      Return 0 on success.
 528 * @inode_listsecurity:
 529 *      Copy the extended attribute names for the security labels
 530 *      associated with @inode into @buffer.  The maximum size of @buffer
 531 *      is specified by @buffer_size.  @buffer may be NULL to request
 532 *      the size of the buffer required.
 533 *      Returns number of bytes used/required on success.
 534 * @inode_need_killpriv:
 535 *      Called when an inode has been changed.
 536 *      @dentry is the dentry being changed.
 537 *      Return <0 on error to abort the inode change operation.
 538 *      Return 0 if inode_killpriv does not need to be called.
 539 *      Return >0 if inode_killpriv does need to be called.
 540 * @inode_killpriv:
 541 *      The setuid bit is being removed.  Remove similar security labels.
 542 *      Called with the dentry->d_inode->i_mutex held.
 543 *      @dentry is the dentry being changed.
 544 *      Return 0 on success.  If error is returned, then the operation
 545 *      causing setuid bit removal is failed.
 546 * @inode_getsecid:
 547 *      Get the secid associated with the node.
 548 *      @inode contains a pointer to the inode.
 549 *      @secid contains a pointer to the location where result will be saved.
 550 *      In case of failure, @secid will be set to zero.
 551 *
 552 * Security hooks for file operations
 553 *
 554 * @file_permission:
 555 *      Check file permissions before accessing an open file.  This hook is
 556 *      called by various operations that read or write files.  A security
 557 *      module can use this hook to perform additional checking on these
 558 *      operations, e.g.  to revalidate permissions on use to support privilege
 559 *      bracketing or policy changes.  Notice that this hook is used when the
 560 *      actual read/write operations are performed, whereas the
 561 *      inode_security_ops hook is called when a file is opened (as well as
 562 *      many other operations).
 563 *      Caveat:  Although this hook can be used to revalidate permissions for
 564 *      various system call operations that read or write files, it does not
 565 *      address the revalidation of permissions for memory-mapped files.
 566 *      Security modules must handle this separately if they need such
 567 *      revalidation.
 568 *      @file contains the file structure being accessed.
 569 *      @mask contains the requested permissions.
 570 *      Return 0 if permission is granted.
 571 * @file_alloc_security:
 572 *      Allocate and attach a security structure to the file->f_security field.
 573 *      The security field is initialized to NULL when the structure is first
 574 *      created.
 575 *      @file contains the file structure to secure.
 576 *      Return 0 if the hook is successful and permission is granted.
 577 * @file_free_security:
 578 *      Deallocate and free any security structures stored in file->f_security.
 579 *      @file contains the file structure being modified.
 580 * @file_ioctl:
 581 *      @file contains the file structure.
 582 *      @cmd contains the operation to perform.
 583 *      @arg contains the operational arguments.
 584 *      Check permission for an ioctl operation on @file.  Note that @arg can
 585 *      sometimes represents a user space pointer; in other cases, it may be a
 586 *      simple integer value.  When @arg represents a user space pointer, it
 587 *      should never be used by the security module.
 588 *      Return 0 if permission is granted.
 589 * @file_mmap :
 590 *      Check permissions for a mmap operation.  The @file may be NULL, e.g.
 591 *      if mapping anonymous memory.
 592 *      @file contains the file structure for file to map (may be NULL).
 593 *      @reqprot contains the protection requested by the application.
 594 *      @prot contains the protection that will be applied by the kernel.
 595 *      @flags contains the operational flags.
 596 *      Return 0 if permission is granted.
 597 * @file_mprotect:
 598 *      Check permissions before changing memory access permissions.
 599 *      @vma contains the memory region to modify.
 600 *      @reqprot contains the protection requested by the application.
 601 *      @prot contains the protection that will be applied by the kernel.
 602 *      Return 0 if permission is granted.
 603 * @file_lock:
 604 *      Check permission before performing file locking operations.
 605 *      Note: this hook mediates both flock and fcntl style locks.
 606 *      @file contains the file structure.
 607 *      @cmd contains the posix-translated lock operation to perform
 608 *      (e.g. F_RDLCK, F_WRLCK).
 609 *      Return 0 if permission is granted.
 610 * @file_fcntl:
 611 *      Check permission before allowing the file operation specified by @cmd
 612 *      from being performed on the file @file.  Note that @arg can sometimes
 613 *      represents a user space pointer; in other cases, it may be a simple
 614 *      integer value.  When @arg represents a user space pointer, it should
 615 *      never be used by the security module.
 616 *      @file contains the file structure.
 617 *      @cmd contains the operation to be performed.
 618 *      @arg contains the operational arguments.
 619 *      Return 0 if permission is granted.
 620 * @file_set_fowner:
 621 *      Save owner security information (typically from current->security) in
 622 *      file->f_security for later use by the send_sigiotask hook.
 623 *      @file contains the file structure to update.
 624 *      Return 0 on success.
 625 * @file_send_sigiotask:
 626 *      Check permission for the file owner @fown to send SIGIO or SIGURG to the
 627 *      process @tsk.  Note that this hook is sometimes called from interrupt.
 628 *      Note that the fown_struct, @fown, is never outside the context of a
 629 *      struct file, so the file structure (and associated security information)
 630 *      can always be obtained:
 631 *              container_of(fown, struct file, f_owner)
 632 *      @tsk contains the structure of task receiving signal.
 633 *      @fown contains the file owner information.
 634 *      @sig is the signal that will be sent.  When 0, kernel sends SIGIO.
 635 *      Return 0 if permission is granted.
 636 * @file_receive:
 637 *      This hook allows security modules to control the ability of a process
 638 *      to receive an open file descriptor via socket IPC.
 639 *      @file contains the file structure being received.
 640 *      Return 0 if permission is granted.
 641 *
 642 * Security hook for dentry
 643 *
 644 * @dentry_open
 645 *      Save open-time permission checking state for later use upon
 646 *      file_permission, and recheck access if anything has changed
 647 *      since inode_permission.
 648 *
 649 * Security hooks for task operations.
 650 *
 651 * @task_create:
 652 *      Check permission before creating a child process.  See the clone(2)
 653 *      manual page for definitions of the @clone_flags.
 654 *      @clone_flags contains the flags indicating what should be shared.
 655 *      Return 0 if permission is granted.
 656 * @cred_alloc_blank:
 657 *      @cred points to the credentials.
 658 *      @gfp indicates the atomicity of any memory allocations.
 659 *      Only allocate sufficient memory and attach to @cred such that
 660 *      cred_transfer() will not get ENOMEM.
 661 * @cred_free:
 662 *      @cred points to the credentials.
 663 *      Deallocate and clear the cred->security field in a set of credentials.
 664 * @cred_prepare:
 665 *      @new points to the new credentials.
 666 *      @old points to the original credentials.
 667 *      @gfp indicates the atomicity of any memory allocations.
 668 *      Prepare a new set of credentials by copying the data from the old set.
 669 * @cred_commit:
 670 *      @new points to the new credentials.
 671 *      @old points to the original credentials.
 672 *      Install a new set of credentials.
 673 * @cred_transfer:
 674 *      @new points to the new credentials.
 675 *      @old points to the original credentials.
 676 *      Transfer data from original creds to new creds
 677 * @kernel_act_as:
 678 *      Set the credentials for a kernel service to act as (subjective context).
 679 *      @new points to the credentials to be modified.
 680 *      @secid specifies the security ID to be set
 681 *      The current task must be the one that nominated @secid.
 682 *      Return 0 if successful.
 683 * @kernel_create_files_as:
 684 *      Set the file creation context in a set of credentials to be the same as
 685 *      the objective context of the specified inode.
 686 *      @new points to the credentials to be modified.
 687 *      @inode points to the inode to use as a reference.
 688 *      The current task must be the one that nominated @inode.
 689 *      Return 0 if successful.
 690 * @kernel_module_request:
 691 *      Ability to trigger the kernel to automatically upcall to userspace for
 692 *      userspace to load a kernel module with the given name.
 693 *      Return 0 if successful.
 694 * @task_setuid:
 695 *      Check permission before setting one or more of the user identity
 696 *      attributes of the current process.  The @flags parameter indicates
 697 *      which of the set*uid system calls invoked this hook and how to
 698 *      interpret the @id0, @id1, and @id2 parameters.  See the LSM_SETID
 699 *      definitions at the beginning of this file for the @flags values and
 700 *      their meanings.
 701 *      @id0 contains a uid.
 702 *      @id1 contains a uid.
 703 *      @id2 contains a uid.
 704 *      @flags contains one of the LSM_SETID_* values.
 705 *      Return 0 if permission is granted.
 706 * @task_fix_setuid:
 707 *      Update the module's state after setting one or more of the user
 708 *      identity attributes of the current process.  The @flags parameter
 709 *      indicates which of the set*uid system calls invoked this hook.  If
 710 *      @new is the set of credentials that will be installed.  Modifications
 711 *      should be made to this rather than to @current->cred.
 712 *      @old is the set of credentials that are being replaces
 713 *      @flags contains one of the LSM_SETID_* values.
 714 *      Return 0 on success.
 715 * @task_setgid:
 716 *      Check permission before setting one or more of the group identity
 717 *      attributes of the current process.  The @flags parameter indicates
 718 *      which of the set*gid system calls invoked this hook and how to
 719 *      interpret the @id0, @id1, and @id2 parameters.  See the LSM_SETID
 720 *      definitions at the beginning of this file for the @flags values and
 721 *      their meanings.
 722 *      @id0 contains a gid.
 723 *      @id1 contains a gid.
 724 *      @id2 contains a gid.
 725 *      @flags contains one of the LSM_SETID_* values.
 726 *      Return 0 if permission is granted.
 727 * @task_setpgid:
 728 *      Check permission before setting the process group identifier of the
 729 *      process @p to @pgid.
 730 *      @p contains the task_struct for process being modified.
 731 *      @pgid contains the new pgid.
 732 *      Return 0 if permission is granted.
 733 * @task_getpgid:
 734 *      Check permission before getting the process group identifier of the
 735 *      process @p.
 736 *      @p contains the task_struct for the process.
 737 *      Return 0 if permission is granted.
 738 * @task_getsid:
 739 *      Check permission before getting the session identifier of the process
 740 *      @p.
 741 *      @p contains the task_struct for the process.
 742 *      Return 0 if permission is granted.
 743 * @task_getsecid:
 744 *      Retrieve the security identifier of the process @p.
 745 *      @p contains the task_struct for the process and place is into @secid.
 746 *      In case of failure, @secid will be set to zero.
 747 *
 748 * @task_setgroups:
 749 *      Check permission before setting the supplementary group set of the
 750 *      current process.
 751 *      @group_info contains the new group information.
 752 *      Return 0 if permission is granted.
 753 * @task_setnice:
 754 *      Check permission before setting the nice value of @p to @nice.
 755 *      @p contains the task_struct of process.
 756 *      @nice contains the new nice value.
 757 *      Return 0 if permission is granted.
 758 * @task_setioprio
 759 *      Check permission before setting the ioprio value of @p to @ioprio.
 760 *      @p contains the task_struct of process.
 761 *      @ioprio contains the new ioprio value
 762 *      Return 0 if permission is granted.
 763 * @task_getioprio
 764 *      Check permission before getting the ioprio value of @p.
 765 *      @p contains the task_struct of process.
 766 *      Return 0 if permission is granted.
 767 * @task_setrlimit:
 768 *      Check permission before setting the resource limits of the current
 769 *      process for @resource to @new_rlim.  The old resource limit values can
 770 *      be examined by dereferencing (current->signal->rlim + resource).
 771 *      @resource contains the resource whose limit is being set.
 772 *      @new_rlim contains the new limits for @resource.
 773 *      Return 0 if permission is granted.
 774 * @task_setscheduler:
 775 *      Check permission before setting scheduling policy and/or parameters of
 776 *      process @p based on @policy and @lp.
 777 *      @p contains the task_struct for process.
 778 *      @policy contains the scheduling policy.
 779 *      @lp contains the scheduling parameters.
 780 *      Return 0 if permission is granted.
 781 * @task_getscheduler:
 782 *      Check permission before obtaining scheduling information for process
 783 *      @p.
 784 *      @p contains the task_struct for process.
 785 *      Return 0 if permission is granted.
 786 * @task_movememory
 787 *      Check permission before moving memory owned by process @p.
 788 *      @p contains the task_struct for process.
 789 *      Return 0 if permission is granted.
 790 * @task_kill:
 791 *      Check permission before sending signal @sig to @p.  @info can be NULL,
 792 *      the constant 1, or a pointer to a siginfo structure.  If @info is 1 or
 793 *      SI_FROMKERNEL(info) is true, then the signal should be viewed as coming
 794 *      from the kernel and should typically be permitted.
 795 *      SIGIO signals are handled separately by the send_sigiotask hook in
 796 *      file_security_ops.
 797 *      @p contains the task_struct for process.
 798 *      @info contains the signal information.
 799 *      @sig contains the signal value.
 800 *      @secid contains the sid of the process where the signal originated
 801 *      Return 0 if permission is granted.
 802 * @task_wait:
 803 *      Check permission before allowing a process to reap a child process @p
 804 *      and collect its status information.
 805 *      @p contains the task_struct for process.
 806 *      Return 0 if permission is granted.
 807 * @task_prctl:
 808 *      Check permission before performing a process control operation on the
 809 *      current process.
 810 *      @option contains the operation.
 811 *      @arg2 contains a argument.
 812 *      @arg3 contains a argument.
 813 *      @arg4 contains a argument.
 814 *      @arg5 contains a argument.
 815 *      Return -ENOSYS if no-one wanted to handle this op, any other value to
 816 *      cause prctl() to return immediately with that value.
 817 * @task_to_inode:
 818 *      Set the security attributes for an inode based on an associated task's
 819 *      security attributes, e.g. for /proc/pid inodes.
 820 *      @p contains the task_struct for the task.
 821 *      @inode contains the inode structure for the inode.
 822 *
 823 * Security hooks for Netlink messaging.
 824 *
 825 * @netlink_send:
 826 *      Save security information for a netlink message so that permission
 827 *      checking can be performed when the message is processed.  The security
 828 *      information can be saved using the eff_cap field of the
 829 *      netlink_skb_parms structure.  Also may be used to provide fine
 830 *      grained control over message transmission.
 831 *      @sk associated sock of task sending the message.,
 832 *      @skb contains the sk_buff structure for the netlink message.
 833 *      Return 0 if the information was successfully saved and message
 834 *      is allowed to be transmitted.
 835 * @netlink_recv:
 836 *      Check permission before processing the received netlink message in
 837 *      @skb.
 838 *      @skb contains the sk_buff structure for the netlink message.
 839 *      @cap indicates the capability required
 840 *      Return 0 if permission is granted.
 841 *
 842 * Security hooks for Unix domain networking.
 843 *
 844 * @unix_stream_connect:
 845 *      Check permissions before establishing a Unix domain stream connection
 846 *      between @sock and @other.
 847 *      @sock contains the socket structure.
 848 *      @other contains the peer socket structure.
 849 *      Return 0 if permission is granted.
 850 * @unix_may_send:
 851 *      Check permissions before connecting or sending datagrams from @sock to
 852 *      @other.
 853 *      @sock contains the socket structure.
 854 *      @sock contains the peer socket structure.
 855 *      Return 0 if permission is granted.
 856 *
 857 * The @unix_stream_connect and @unix_may_send hooks were necessary because
 858 * Linux provides an alternative to the conventional file name space for Unix
 859 * domain sockets.  Whereas binding and connecting to sockets in the file name
 860 * space is mediated by the typical file permissions (and caught by the mknod
 861 * and permission hooks in inode_security_ops), binding and connecting to
 862 * sockets in the abstract name space is completely unmediated.  Sufficient
 863 * control of Unix domain sockets in the abstract name space isn't possible
 864 * using only the socket layer hooks, since we need to know the actual target
 865 * socket, which is not looked up until we are inside the af_unix code.
 866 *
 867 * Security hooks for socket operations.
 868 *
 869 * @socket_create:
 870 *      Check permissions prior to creating a new socket.
 871 *      @family contains the requested protocol family.
 872 *      @type contains the requested communications type.
 873 *      @protocol contains the requested protocol.
 874 *      @kern set to 1 if a kernel socket.
 875 *      Return 0 if permission is granted.
 876 * @socket_post_create:
 877 *      This hook allows a module to update or allocate a per-socket security
 878 *      structure. Note that the security field was not added directly to the
 879 *      socket structure, but rather, the socket security information is stored
 880 *      in the associated inode.  Typically, the inode alloc_security hook will
 881 *      allocate and and attach security information to
 882 *      sock->inode->i_security.  This hook may be used to update the
 883 *      sock->inode->i_security field with additional information that wasn't
 884 *      available when the inode was allocated.
 885 *      @sock contains the newly created socket structure.
 886 *      @family contains the requested protocol family.
 887 *      @type contains the requested communications type.
 888 *      @protocol contains the requested protocol.
 889 *      @kern set to 1 if a kernel socket.
 890 * @socket_bind:
 891 *      Check permission before socket protocol layer bind operation is
 892 *      performed and the socket @sock is bound to the address specified in the
 893 *      @address parameter.
 894 *      @sock contains the socket structure.
 895 *      @address contains the address to bind to.
 896 *      @addrlen contains the length of address.
 897 *      Return 0 if permission is granted.
 898 * @socket_connect:
 899 *      Check permission before socket protocol layer connect operation
 900 *      attempts to connect socket @sock to a remote address, @address.
 901 *      @sock contains the socket structure.
 902 *      @address contains the address of remote endpoint.
 903 *      @addrlen contains the length of address.
 904 *      Return 0 if permission is granted.
 905 * @socket_listen:
 906 *      Check permission before socket protocol layer listen operation.
 907 *      @sock contains the socket structure.
 908 *      @backlog contains the maximum length for the pending connection queue.
 909 *      Return 0 if permission is granted.
 910 * @socket_accept:
 911 *      Check permission before accepting a new connection.  Note that the new
 912 *      socket, @newsock, has been created and some information copied to it,
 913 *      but the accept operation has not actually been performed.
 914 *      @sock contains the listening socket structure.
 915 *      @newsock contains the newly created server socket for connection.
 916 *      Return 0 if permission is granted.
 917 * @socket_sendmsg:
 918 *      Check permission before transmitting a message to another socket.
 919 *      @sock contains the socket structure.
 920 *      @msg contains the message to be transmitted.
 921 *      @size contains the size of message.
 922 *      Return 0 if permission is granted.
 923 * @socket_recvmsg:
 924 *      Check permission before receiving a message from a socket.
 925 *      @sock contains the socket structure.
 926 *      @msg contains the message structure.
 927 *      @size contains the size of message structure.
 928 *      @flags contains the operational flags.
 929 *      Return 0 if permission is granted.
 930 * @socket_getsockname:
 931 *      Check permission before the local address (name) of the socket object
 932 *      @sock is retrieved.
 933 *      @sock contains the socket structure.
 934 *      Return 0 if permission is granted.
 935 * @socket_getpeername:
 936 *      Check permission before the remote address (name) of a socket object
 937 *      @sock is retrieved.
 938 *      @sock contains the socket structure.
 939 *      Return 0 if permission is granted.
 940 * @socket_getsockopt:
 941 *      Check permissions before retrieving the options associated with socket
 942 *      @sock.
 943 *      @sock contains the socket structure.
 944 *      @level contains the protocol level to retrieve option from.
 945 *      @optname contains the name of option to retrieve.
 946 *      Return 0 if permission is granted.
 947 * @socket_setsockopt:
 948 *      Check permissions before setting the options associated with socket
 949 *      @sock.
 950 *      @sock contains the socket structure.
 951 *      @level contains the protocol level to set options for.
 952 *      @optname contains the name of the option to set.
 953 *      Return 0 if permission is granted.
 954 * @socket_shutdown:
 955 *      Checks permission before all or part of a connection on the socket
 956 *      @sock is shut down.
 957 *      @sock contains the socket structure.
 958 *      @how contains the flag indicating how future sends and receives are handled.
 959 *      Return 0 if permission is granted.
 960 * @socket_sock_rcv_skb:
 961 *      Check permissions on incoming network packets.  This hook is distinct
 962 *      from Netfilter's IP input hooks since it is the first time that the
 963 *      incoming sk_buff @skb has been associated with a particular socket, @sk.
 964 *      @sk contains the sock (not socket) associated with the incoming sk_buff.
 965 *      @skb contains the incoming network data.
 966 * @socket_getpeersec_stream:
 967 *      This hook allows the security module to provide peer socket security
 968 *      state for unix or connected tcp sockets to userspace via getsockopt
 969 *      SO_GETPEERSEC.  For tcp sockets this can be meaningful if the
 970 *      socket is associated with an ipsec SA.
 971 *      @sock is the local socket.
 972 *      @optval userspace memory where the security state is to be copied.
 973 *      @optlen userspace int where the module should copy the actual length
 974 *      of the security state.
 975 *      @len as input is the maximum length to copy to userspace provided
 976 *      by the caller.
 977 *      Return 0 if all is well, otherwise, typical getsockopt return
 978 *      values.
 979 * @socket_getpeersec_dgram:
 980 *      This hook allows the security module to provide peer socket security
 981 *      state for udp sockets on a per-packet basis to userspace via
 982 *      getsockopt SO_GETPEERSEC.  The application must first have indicated
 983 *      the IP_PASSSEC option via getsockopt.  It can then retrieve the
 984 *      security state returned by this hook for a packet via the SCM_SECURITY
 985 *      ancillary message type.
 986 *      @skb is the skbuff for the packet being queried
 987 *      @secdata is a pointer to a buffer in which to copy the security data
 988 *      @seclen is the maximum length for @secdata
 989 *      Return 0 on success, error on failure.
 990 * @sk_alloc_security:
 991 *      Allocate and attach a security structure to the sk->sk_security field,
 992 *      which is used to copy security attributes between local stream sockets.
 993 * @sk_free_security:
 994 *      Deallocate security structure.
 995 * @sk_clone_security:
 996 *      Clone/copy security structure.
 997 * @sk_getsecid:
 998 *      Retrieve the LSM-specific secid for the sock to enable caching of network
 999 *      authorizations.
1000 * @sock_graft:
1001 *      Sets the socket's isec sid to the sock's sid.
1002 * @inet_conn_request:
1003 *      Sets the openreq's sid to socket's sid with MLS portion taken from peer sid.
1004 * @inet_csk_clone:
1005 *      Sets the new child socket's sid to the openreq sid.
1006 * @inet_conn_established:
1007 *      Sets the connection's peersid to the secmark on skb.
1008 * @req_classify_flow:
1009 *      Sets the flow's sid to the openreq sid.
1010 * @tun_dev_create:
1011 *      Check permissions prior to creating a new TUN device.
1012 * @tun_dev_post_create:
1013 *      This hook allows a module to update or allocate a per-socket security
1014 *      structure.
1015 *      @sk contains the newly created sock structure.
1016 * @tun_dev_attach:
1017 *      Check permissions prior to attaching to a persistent TUN device.  This
1018 *      hook can also be used by the module to update any security state
1019 *      associated with the TUN device's sock structure.
1020 *      @sk contains the existing sock structure.
1021 *
1022 * Security hooks for XFRM operations.
1023 *
1024 * @xfrm_policy_alloc_security:
1025 *      @ctxp is a pointer to the xfrm_sec_ctx being added to Security Policy
1026 *      Database used by the XFRM system.
1027 *      @sec_ctx contains the security context information being provided by
1028 *      the user-level policy update program (e.g., setkey).
1029 *      Allocate a security structure to the xp->security field; the security
1030 *      field is initialized to NULL when the xfrm_policy is allocated.
1031 *      Return 0 if operation was successful (memory to allocate, legal context)
1032 * @xfrm_policy_clone_security:
1033 *      @old_ctx contains an existing xfrm_sec_ctx.
1034 *      @new_ctxp contains a new xfrm_sec_ctx being cloned from old.
1035 *      Allocate a security structure in new_ctxp that contains the
1036 *      information from the old_ctx structure.
1037 *      Return 0 if operation was successful (memory to allocate).
1038 * @xfrm_policy_free_security:
1039 *      @ctx contains the xfrm_sec_ctx
1040 *      Deallocate xp->security.
1041 * @xfrm_policy_delete_security:
1042 *      @ctx contains the xfrm_sec_ctx.
1043 *      Authorize deletion of xp->security.
1044 * @xfrm_state_alloc_security:
1045 *      @x contains the xfrm_state being added to the Security Association
1046 *      Database by the XFRM system.
1047 *      @sec_ctx contains the security context information being provided by
1048 *      the user-level SA generation program (e.g., setkey or racoon).
1049 *      @secid contains the secid from which to take the mls portion of the context.
1050 *      Allocate a security structure to the x->security field; the security
1051 *      field is initialized to NULL when the xfrm_state is allocated. Set the
1052 *      context to correspond to either sec_ctx or polsec, with the mls portion
1053 *      taken from secid in the latter case.
1054 *      Return 0 if operation was successful (memory to allocate, legal context).
1055 * @xfrm_state_free_security:
1056 *      @x contains the xfrm_state.
1057 *      Deallocate x->security.
1058 * @xfrm_state_delete_security:
1059 *      @x contains the xfrm_state.
1060 *      Authorize deletion of x->security.
1061 * @xfrm_policy_lookup:
1062 *      @ctx contains the xfrm_sec_ctx for which the access control is being
1063 *      checked.
1064 *      @fl_secid contains the flow security label that is used to authorize
1065 *      access to the policy xp.
1066 *      @dir contains the direction of the flow (input or output).
1067 *      Check permission when a flow selects a xfrm_policy for processing
1068 *      XFRMs on a packet.  The hook is called when selecting either a
1069 *      per-socket policy or a generic xfrm policy.
1070 *      Return 0 if permission is granted, -ESRCH otherwise, or -errno
1071 *      on other errors.
1072 * @xfrm_state_pol_flow_match:
1073 *      @x contains the state to match.
1074 *      @xp contains the policy to check for a match.
1075 *      @fl contains the flow to check for a match.
1076 *      Return 1 if there is a match.
1077 * @xfrm_decode_session:
1078 *      @skb points to skb to decode.
1079 *      @secid points to the flow key secid to set.
1080 *      @ckall says if all xfrms used should be checked for same secid.
1081 *      Return 0 if ckall is zero or all xfrms used have the same secid.
1082 *
1083 * Security hooks affecting all Key Management operations
1084 *
1085 * @key_alloc:
1086 *      Permit allocation of a key and assign security data. Note that key does
1087 *      not have a serial number assigned at this point.
1088 *      @key points to the key.
1089 *      @flags is the allocation flags
1090 *      Return 0 if permission is granted, -ve error otherwise.
1091 * @key_free:
1092 *      Notification of destruction; free security data.
1093 *      @key points to the key.
1094 *      No return value.
1095 * @key_permission:
1096 *      See whether a specific operational right is granted to a process on a
1097 *      key.
1098 *      @key_ref refers to the key (key pointer + possession attribute bit).
1099 *      @cred points to the credentials to provide the context against which to
1100 *      evaluate the security data on the key.
1101 *      @perm describes the combination of permissions required of this key.
1102 *      Return 1 if permission granted, 0 if permission denied and -ve it the
1103 *      normal permissions model should be effected.
1104 * @key_getsecurity:
1105 *      Get a textual representation of the security context attached to a key
1106 *      for the purposes of honouring KEYCTL_GETSECURITY.  This function
1107 *      allocates the storage for the NUL-terminated string and the caller
1108 *      should free it.
1109 *      @key points to the key to be queried.
1110 *      @_buffer points to a pointer that should be set to point to the
1111 *       resulting string (if no label or an error occurs).
1112 *      Return the length of the string (including terminating NUL) or -ve if
1113 *      an error.
1114 *      May also return 0 (and a NULL buffer pointer) if there is no label.
1115 * @key_session_to_parent:
1116 *      Forcibly assign the session keyring from a process to its parent
1117 *      process.
1118 *      @cred: Pointer to process's credentials
1119 *      @parent_cred: Pointer to parent process's credentials
1120 *      @keyring: Proposed new session keyring
1121 *      Return 0 if permission is granted, -ve error otherwise.
1122 *
1123 * Security hooks affecting all System V IPC operations.
1124 *
1125 * @ipc_permission:
1126 *      Check permissions for access to IPC
1127 *      @ipcp contains the kernel IPC permission structure
1128 *      @flag contains the desired (requested) permission set
1129 *      Return 0 if permission is granted.
1130 * @ipc_getsecid:
1131 *      Get the secid associated with the ipc object.
1132 *      @ipcp contains the kernel IPC permission structure.
1133 *      @secid contains a pointer to the location where result will be saved.
1134 *      In case of failure, @secid will be set to zero.
1135 *
1136 * Security hooks for individual messages held in System V IPC message queues
1137 * @msg_msg_alloc_security:
1138 *      Allocate and attach a security structure to the msg->security field.
1139 *      The security field is initialized to NULL when the structure is first
1140 *      created.
1141 *      @msg contains the message structure to be modified.
1142 *      Return 0 if operation was successful and permission is granted.
1143 * @msg_msg_free_security:
1144 *      Deallocate the security structure for this message.
1145 *      @msg contains the message structure to be modified.
1146 *
1147 * Security hooks for System V IPC Message Queues
1148 *
1149 * @msg_queue_alloc_security:
1150 *      Allocate and attach a security structure to the
1151 *      msq->q_perm.security field. The security field is initialized to
1152 *      NULL when the structure is first created.
1153 *      @msq contains the message queue structure to be modified.
1154 *      Return 0 if operation was successful and permission is granted.
1155 * @msg_queue_free_security:
1156 *      Deallocate security structure for this message queue.
1157 *      @msq contains the message queue structure to be modified.
1158 * @msg_queue_associate:
1159 *      Check permission when a message queue is requested through the
1160 *      msgget system call.  This hook is only called when returning the
1161 *      message queue identifier for an existing message queue, not when a
1162 *      new message queue is created.
1163 *      @msq contains the message queue to act upon.
1164 *      @msqflg contains the operation control flags.
1165 *      Return 0 if permission is granted.
1166 * @msg_queue_msgctl:
1167 *      Check permission when a message control operation specified by @cmd
1168 *      is to be performed on the message queue @msq.
1169 *      The @msq may be NULL, e.g. for IPC_INFO or MSG_INFO.
1170 *      @msq contains the message queue to act upon.  May be NULL.
1171 *      @cmd contains the operation to be performed.
1172 *      Return 0 if permission is granted.
1173 * @msg_queue_msgsnd:
1174 *      Check permission before a message, @msg, is enqueued on the message
1175 *      queue, @msq.
1176 *      @msq contains the message queue to send message to.
1177 *      @msg contains the message to be enqueued.
1178 *      @msqflg contains operational flags.
1179 *      Return 0 if permission is granted.
1180 * @msg_queue_msgrcv:
1181 *      Check permission before a message, @msg, is removed from the message
1182 *      queue, @msq.  The @target task structure contains a pointer to the
1183 *      process that will be receiving the message (not equal to the current
1184 *      process when inline receives are being performed).
1185 *      @msq contains the message queue to retrieve message from.
1186 *      @msg contains the message destination.
1187 *      @target contains the task structure for recipient process.
1188 *      @type contains the type of message requested.
1189 *      @mode contains the operational flags.
1190 *      Return 0 if permission is granted.
1191 *
1192 * Security hooks for System V Shared Memory Segments
1193 *
1194 * @shm_alloc_security:
1195 *      Allocate and attach a security structure to the shp->shm_perm.security
1196 *      field.  The security field is initialized to NULL when the structure is
1197 *      first created.
1198 *      @shp contains the shared memory structure to be modified.
1199 *      Return 0 if operation was successful and permission is granted.
1200 * @shm_free_security:
1201 *      Deallocate the security struct for this memory segment.
1202 *      @shp contains the shared memory structure to be modified.
1203 * @shm_associate:
1204 *      Check permission when a shared memory region is requested through the
1205 *      shmget system call.  This hook is only called when returning the shared
1206 *      memory region identifier for an existing region, not when a new shared
1207 *      memory region is created.
1208 *      @shp contains the shared memory structure to be modified.
1209 *      @shmflg contains the operation control flags.
1210 *      Return 0 if permission is granted.
1211 * @shm_shmctl:
1212 *      Check permission when a shared memory control operation specified by
1213 *      @cmd is to be performed on the shared memory region @shp.
1214 *      The @shp may be NULL, e.g. for IPC_INFO or SHM_INFO.
1215 *      @shp contains shared memory structure to be modified.
1216 *      @cmd contains the operation to be performed.
1217 *      Return 0 if permission is granted.
1218 * @shm_shmat:
1219 *      Check permissions prior to allowing the shmat system call to attach the
1220 *      shared memory segment @shp to the data segment of the calling process.
1221 *      The attaching address is specified by @shmaddr.
1222 *      @shp contains the shared memory structure to be modified.
1223 *      @shmaddr contains the address to attach memory region to.
1224 *      @shmflg contains the operational flags.
1225 *      Return 0 if permission is granted.
1226 *
1227 * Security hooks for System V Semaphores
1228 *
1229 * @sem_alloc_security:
1230 *      Allocate and attach a security structure to the sma->sem_perm.security
1231 *      field.  The security field is initialized to NULL when the structure is
1232 *      first created.
1233 *      @sma contains the semaphore structure
1234 *      Return 0 if operation was successful and permission is granted.
1235 * @sem_free_security:
1236 *      deallocate security struct for this semaphore
1237 *      @sma contains the semaphore structure.
1238 * @sem_associate:
1239 *      Check permission when a semaphore is requested through the semget
1240 *      system call.  This hook is only called when returning the semaphore
1241 *      identifier for an existing semaphore, not when a new one must be
1242 *      created.
1243 *      @sma contains the semaphore structure.
1244 *      @semflg contains the operation control flags.
1245 *      Return 0 if permission is granted.
1246 * @sem_semctl:
1247 *      Check permission when a semaphore operation specified by @cmd is to be
1248 *      performed on the semaphore @sma.  The @sma may be NULL, e.g. for
1249 *      IPC_INFO or SEM_INFO.
1250 *      @sma contains the semaphore structure.  May be NULL.
1251 *      @cmd contains the operation to be performed.
1252 *      Return 0 if permission is granted.
1253 * @sem_semop
1254 *      Check permissions before performing operations on members of the
1255 *      semaphore set @sma.  If the @alter flag is nonzero, the semaphore set
1256 *      may be modified.
1257 *      @sma contains the semaphore structure.
1258 *      @sops contains the operations to perform.
1259 *      @nsops contains the number of operations to perform.
1260 *      @alter contains the flag indicating whether changes are to be made.
1261 *      Return 0 if permission is granted.
1262 *
1263 * @ptrace_access_check:
1264 *      Check permission before allowing the current process to trace the
1265 *      @child process.
1266 *      Security modules may also want to perform a process tracing check
1267 *      during an execve in the set_security or apply_creds hooks of
1268 *      tracing check during an execve in the bprm_set_creds hook of
1269 *      binprm_security_ops if the process is being traced and its security
1270 *      attributes would be changed by the execve.
1271 *      @child contains the task_struct structure for the target process.
1272 *      @mode contains the PTRACE_MODE flags indicating the form of access.
1273 *      Return 0 if permission is granted.
1274 * @ptrace_traceme:
1275 *      Check that the @parent process has sufficient permission to trace the
1276 *      current process before allowing the current process to present itself
1277 *      to the @parent process for tracing.
1278 *      The parent process will still have to undergo the ptrace_access_check
1279 *      checks before it is allowed to trace this one.
1280 *      @parent contains the task_struct structure for debugger process.
1281 *      Return 0 if permission is granted.
1282 * @capget:
1283 *      Get the @effective, @inheritable, and @permitted capability sets for
1284 *      the @target process.  The hook may also perform permission checking to
1285 *      determine if the current process is allowed to see the capability sets
1286 *      of the @target process.
1287 *      @target contains the task_struct structure for target process.
1288 *      @effective contains the effective capability set.
1289 *      @inheritable contains the inheritable capability set.
1290 *      @permitted contains the permitted capability set.
1291 *      Return 0 if the capability sets were successfully obtained.
1292 * @capset:
1293 *      Set the @effective, @inheritable, and @permitted capability sets for
1294 *      the current process.
1295 *      @new contains the new credentials structure for target process.
1296 *      @old contains the current credentials structure for target process.
1297 *      @effective contains the effective capability set.
1298 *      @inheritable contains the inheritable capability set.
1299 *      @permitted contains the permitted capability set.
1300 *      Return 0 and update @new if permission is granted.
1301 * @capable:
1302 *      Check whether the @tsk process has the @cap capability in the indicated
1303 *      credentials.
1304 *      @tsk contains the task_struct for the process.
1305 *      @cred contains the credentials to use.
1306 *      @cap contains the capability <include/linux/capability.h>.
1307 *      @audit: Whether to write an audit message or not
1308 *      Return 0 if the capability is granted for @tsk.
1309 * @acct:
1310 *      Check permission before enabling or disabling process accounting.  If
1311 *      accounting is being enabled, then @file refers to the open file used to
1312 *      store accounting records.  If accounting is being disabled, then @file
1313 *      is NULL.
1314 *      @file contains the file structure for the accounting file (may be NULL).
1315 *      Return 0 if permission is granted.
1316 * @sysctl:
1317 *      Check permission before accessing the @table sysctl variable in the
1318 *      manner specified by @op.
1319 *      @table contains the ctl_table structure for the sysctl variable.
1320 *      @op contains the operation (001 = search, 002 = write, 004 = read).
1321 *      Return 0 if permission is granted.
1322 * @syslog:
1323 *      Check permission before accessing the kernel message ring or changing
1324 *      logging to the console.
1325 *      See the syslog(2) manual page for an explanation of the @type values.
1326 *      @type contains the type of action.
1327 *      Return 0 if permission is granted.
1328 * @settime:
1329 *      Check permission to change the system time.
1330 *      struct timespec and timezone are defined in include/linux/time.h
1331 *      @ts contains new time
1332 *      @tz contains new timezone
1333 *      Return 0 if permission is granted.
1334 * @vm_enough_memory:
1335 *      Check permissions for allocating a new virtual mapping.
1336 *      @mm contains the mm struct it is being added to.
1337 *      @pages contains the number of pages.
1338 *      Return 0 if permission is granted.
1339 *
1340 * @secid_to_secctx:
1341 *      Convert secid to security context.
1342 *      @secid contains the security ID.
1343 *      @secdata contains the pointer that stores the converted security context.
1344 * @secctx_to_secid:
1345 *      Convert security context to secid.
1346 *      @secid contains the pointer to the generated security ID.
1347 *      @secdata contains the security context.
1348 *
1349 * @release_secctx:
1350 *      Release the security context.
1351 *      @secdata contains the security context.
1352 *      @seclen contains the length of the security context.
1353 *
1354 * Security hooks for Audit
1355 *
1356 * @audit_rule_init:
1357 *      Allocate and initialize an LSM audit rule structure.
1358 *      @field contains the required Audit action. Fields flags are defined in include/linux/audit.h
1359 *      @op contains the operator the rule uses.
1360 *      @rulestr contains the context where the rule will be applied to.
1361 *      @lsmrule contains a pointer to receive the result.
1362 *      Return 0 if @lsmrule has been successfully set,
1363 *      -EINVAL in case of an invalid rule.
1364 *
1365 * @audit_rule_known:
1366 *      Specifies whether given @rule contains any fields related to current LSM.
1367 *      @rule contains the audit rule of interest.
1368 *      Return 1 in case of relation found, 0 otherwise.
1369 *
1370 * @audit_rule_match:
1371 *      Determine if given @secid matches a rule previously approved
1372 *      by @audit_rule_known.
1373 *      @secid contains the security id in question.
1374 *      @field contains the field which relates to current LSM.
1375 *      @op contains the operator that will be used for matching.
1376 *      @rule points to the audit rule that will be checked against.
1377 *      @actx points to the audit context associated with the check.
1378 *      Return 1 if secid matches the rule, 0 if it does not, -ERRNO on failure.
1379 *
1380 * @audit_rule_free:
1381 *      Deallocate the LSM audit rule structure previously allocated by
1382 *      audit_rule_init.
1383 *      @rule contains the allocated rule
1384 *
1385 * @inode_notifysecctx:
1386 *      Notify the security module of what the security context of an inode
1387 *      should be.  Initializes the incore security context managed by the
1388 *      security module for this inode.  Example usage:  NFS client invokes
1389 *      this hook to initialize the security context in its incore inode to the
1390 *      value provided by the server for the file when the server returned the
1391 *      file's attributes to the client.
1392 *
1393 *      Must be called with inode->i_mutex locked.
1394 *
1395 *      @inode we wish to set the security context of.
1396 *      @ctx contains the string which we wish to set in the inode.
1397 *      @ctxlen contains the length of @ctx.
1398 *
1399 * @inode_setsecctx:
1400 *      Change the security context of an inode.  Updates the
1401 *      incore security context managed by the security module and invokes the
1402 *      fs code as needed (via __vfs_setxattr_noperm) to update any backing
1403 *      xattrs that represent the context.  Example usage:  NFS server invokes
1404 *      this hook to change the security context in its incore inode and on the
1405 *      backing filesystem to a value provided by the client on a SETATTR
1406 *      operation.
1407 *
1408 *      Must be called with inode->i_mutex locked.
1409 *
1410 *      @dentry contains the inode we wish to set the security context of.
1411 *      @ctx contains the string which we wish to set in the inode.
1412 *      @ctxlen contains the length of @ctx.
1413 *
1414 * @inode_getsecctx:
1415 *      Returns a string containing all relavent security context information
1416 *
1417 *      @inode we wish to set the security context of.
1418 *      @ctx is a pointer in which to place the allocated security context.
1419 *      @ctxlen points to the place to put the length of @ctx.
1420 * This is the main security structure.
1421 */
1422struct security_operations {
1423        char name[SECURITY_NAME_MAX + 1];
1424
1425        int (*ptrace_access_check) (struct task_struct *child, unsigned int mode);
1426        int (*ptrace_traceme) (struct task_struct *parent);
1427        int (*capget) (struct task_struct *target,
1428                       kernel_cap_t *effective,
1429                       kernel_cap_t *inheritable, kernel_cap_t *permitted);
1430        int (*capset) (struct cred *new,
1431                       const struct cred *old,
1432                       const kernel_cap_t *effective,
1433                       const kernel_cap_t *inheritable,
1434                       const kernel_cap_t *permitted);
1435        int (*capable) (struct task_struct *tsk, const struct cred *cred,
1436                        int cap, int audit);
1437        int (*acct) (struct file *file);
1438        int (*sysctl) (struct ctl_table *table, int op);
1439        int (*quotactl) (int cmds, int type, int id, struct super_block *sb);
1440        int (*quota_on) (struct dentry *dentry);
1441        int (*syslog) (int type);
1442        int (*settime) (struct timespec *ts, struct timezone *tz);
1443        int (*vm_enough_memory) (struct mm_struct *mm, long pages);
1444
1445        int (*bprm_set_creds) (struct linux_binprm *bprm);
1446        int (*bprm_check_security) (struct linux_binprm *bprm);
1447        int (*bprm_secureexec) (struct linux_binprm *bprm);
1448        void (*bprm_committing_creds) (struct linux_binprm *bprm);
1449        void (*bprm_committed_creds) (struct linux_binprm *bprm);
1450
1451        int (*sb_alloc_security) (struct super_block *sb);
1452        void (*sb_free_security) (struct super_block *sb);
1453        int (*sb_copy_data) (char *orig, char *copy);
1454        int (*sb_kern_mount) (struct super_block *sb, int flags, void *data);
1455        int (*sb_show_options) (struct seq_file *m, struct super_block *sb);
1456        int (*sb_statfs) (struct dentry *dentry);
1457        int (*sb_mount) (char *dev_name, struct path *path,
1458                         char *type, unsigned long flags, void *data);
1459        int (*sb_check_sb) (struct vfsmount *mnt, struct path *path);
1460        int (*sb_umount) (struct vfsmount *mnt, int flags);
1461        void (*sb_umount_close) (struct vfsmount *mnt);
1462        void (*sb_umount_busy) (struct vfsmount *mnt);
1463        void (*sb_post_remount) (struct vfsmount *mnt,
1464                                 unsigned long flags, void *data);
1465        void (*sb_post_addmount) (struct vfsmount *mnt,
1466                                  struct path *mountpoint);
1467        int (*sb_pivotroot) (struct path *old_path,
1468                             struct path *new_path);
1469        void (*sb_post_pivotroot) (struct path *old_path,
1470                                   struct path *new_path);
1471        int (*sb_set_mnt_opts) (struct super_block *sb,
1472                                struct security_mnt_opts *opts);
1473        void (*sb_clone_mnt_opts) (const struct super_block *oldsb,
1474                                   struct super_block *newsb);
1475        int (*sb_parse_opts_str) (char *options, struct security_mnt_opts *opts);
1476
1477#ifdef CONFIG_SECURITY_PATH
1478        int (*path_unlink) (struct path *dir, struct dentry *dentry);
1479        int (*path_mkdir) (struct path *dir, struct dentry *dentry, int mode);
1480        int (*path_rmdir) (struct path *dir, struct dentry *dentry);
1481        int (*path_mknod) (struct path *dir, struct dentry *dentry, int mode,
1482                           unsigned int dev);
1483        int (*path_truncate) (struct path *path, loff_t length,
1484                              unsigned int time_attrs);
1485        int (*path_symlink) (struct path *dir, struct dentry *dentry,
1486                             const char *old_name);
1487        int (*path_link) (struct dentry *old_dentry, struct path *new_dir,
1488                          struct dentry *new_dentry);
1489        int (*path_rename) (struct path *old_dir, struct dentry *old_dentry,
1490                            struct path *new_dir, struct dentry *new_dentry);
1491#endif
1492
1493        int (*inode_alloc_security) (struct inode *inode);
1494        void (*inode_free_security) (struct inode *inode);
1495        int (*inode_init_security) (struct inode *inode, struct inode *dir,
1496                                    char **name, void **value, size_t *len);
1497        int (*inode_create) (struct inode *dir,
1498                             struct dentry *dentry, int mode);
1499        int (*inode_link) (struct dentry *old_dentry,
1500                           struct inode *dir, struct dentry *new_dentry);
1501        int (*inode_unlink) (struct inode *dir, struct dentry *dentry);
1502        int (*inode_symlink) (struct inode *dir,
1503                              struct dentry *dentry, const char *old_name);
1504        int (*inode_mkdir) (struct inode *dir, struct dentry *dentry, int mode);
1505        int (*inode_rmdir) (struct inode *dir, struct dentry *dentry);
1506        int (*inode_mknod) (struct inode *dir, struct dentry *dentry,
1507                            int mode, dev_t dev);
1508        int (*inode_rename) (struct inode *old_dir, struct dentry *old_dentry,
1509                             struct inode *new_dir, struct dentry *new_dentry);
1510        int (*inode_readlink) (struct dentry *dentry);
1511        int (*inode_follow_link) (struct dentry *dentry, struct nameidata *nd);
1512        int (*inode_permission) (struct inode *inode, int mask);
1513        int (*inode_setattr)    (struct dentry *dentry, struct iattr *attr);
1514        int (*inode_getattr) (struct vfsmount *mnt, struct dentry *dentry);
1515        void (*inode_delete) (struct inode *inode);
1516        int (*inode_setxattr) (struct dentry *dentry, const char *name,
1517                               const void *value, size_t size, int flags);
1518        void (*inode_post_setxattr) (struct dentry *dentry, const char *name,
1519                                     const void *value, size_t size, int flags);
1520        int (*inode_getxattr) (struct dentry *dentry, const char *name);
1521        int (*inode_listxattr) (struct dentry *dentry);
1522        int (*inode_removexattr) (struct dentry *dentry, const char *name);
1523        int (*inode_need_killpriv) (struct dentry *dentry);
1524        int (*inode_killpriv) (struct dentry *dentry);
1525        int (*inode_getsecurity) (const struct inode *inode, const char *name, void **buffer, bool alloc);
1526        int (*inode_setsecurity) (struct inode *inode, const char *name, const void *value, size_t size, int flags);
1527        int (*inode_listsecurity) (struct inode *inode, char *buffer, size_t buffer_size);
1528        void (*inode_getsecid) (const struct inode *inode, u32 *secid);
1529
1530        int (*file_permission) (struct file *file, int mask);
1531        int (*file_alloc_security) (struct file *file);
1532        void (*file_free_security) (struct file *file);
1533        int (*file_ioctl) (struct file *file, unsigned int cmd,
1534                           unsigned long arg);
1535        int (*file_mmap) (struct file *file,
1536                          unsigned long reqprot, unsigned long prot,
1537                          unsigned long flags, unsigned long addr,
1538                          unsigned long addr_only);
1539        int (*file_mprotect) (struct vm_area_struct *vma,
1540                              unsigned long reqprot,
1541                              unsigned long prot);
1542        int (*file_lock) (struct file *file, unsigned int cmd);
1543        int (*file_fcntl) (struct file *file, unsigned int cmd,
1544                           unsigned long arg);
1545        int (*file_set_fowner) (struct file *file);
1546        int (*file_send_sigiotask) (struct task_struct *tsk,
1547                                    struct fown_struct *fown, int sig);
1548        int (*file_receive) (struct file *file);
1549        int (*dentry_open) (struct file *file, const struct cred *cred);
1550
1551        int (*task_create) (unsigned long clone_flags);
1552        int (*cred_alloc_blank) (struct cred *cred, gfp_t gfp);
1553        void (*cred_free) (struct cred *cred);
1554        int (*cred_prepare)(struct cred *new, const struct cred *old,
1555                            gfp_t gfp);
1556        void (*cred_commit)(struct cred *new, const struct cred *old);
1557        void (*cred_transfer)(struct cred *new, const struct cred *old);
1558        int (*kernel_act_as)(struct cred *new, u32 secid);
1559        int (*kernel_create_files_as)(struct cred *new, struct inode *inode);
1560        int (*kernel_module_request)(void);
1561        int (*task_setuid) (uid_t id0, uid_t id1, uid_t id2, int flags);
1562        int (*task_fix_setuid) (struct cred *new, const struct cred *old,
1563                                int flags);
1564        int (*task_setgid) (gid_t id0, gid_t id1, gid_t id2, int flags);
1565        int (*task_setpgid) (struct task_struct *p, pid_t pgid);
1566        int (*task_getpgid) (struct task_struct *p);
1567        int (*task_getsid) (struct task_struct *p);
1568        void (*task_getsecid) (struct task_struct *p, u32 *secid);
1569        int (*task_setgroups) (struct group_info *group_info);
1570        int (*task_setnice) (struct task_struct *p, int nice);
1571        int (*task_setioprio) (struct task_struct *p, int ioprio);
1572        int (*task_getioprio) (struct task_struct *p);
1573        int (*task_setrlimit) (unsigned int resource, struct rlimit *new_rlim);
1574        int (*task_setscheduler) (struct task_struct *p, int policy,
1575                                  struct sched_param *lp);
1576        int (*task_getscheduler) (struct task_struct *p);
1577        int (*task_movememory) (struct task_struct *p);
1578        int (*task_kill) (struct task_struct *p,
1579                          struct siginfo *info, int sig, u32 secid);
1580        int (*task_wait) (struct task_struct *p);
1581        int (*task_prctl) (int option, unsigned long arg2,
1582                           unsigned long arg3, unsigned long arg4,
1583                           unsigned long arg5);
1584        void (*task_to_inode) (struct task_struct *p, struct inode *inode);
1585
1586        int (*ipc_permission) (struct kern_ipc_perm *ipcp, short flag);
1587        void (*ipc_getsecid) (struct kern_ipc_perm *ipcp, u32 *secid);
1588
1589        int (*msg_msg_alloc_security) (struct msg_msg *msg);
1590        void (*msg_msg_free_security) (struct msg_msg *msg);
1591
1592        int (*msg_queue_alloc_security) (struct msg_queue *msq);
1593        void (*msg_queue_free_security) (struct msg_queue *msq);
1594        int (*msg_queue_associate) (struct msg_queue *msq, int msqflg);
1595        int (*msg_queue_msgctl) (struct msg_queue *msq, int cmd);
1596        int (*msg_queue_msgsnd) (struct msg_queue *msq,
1597                                 struct msg_msg *msg, int msqflg);
1598        int (*msg_queue_msgrcv) (struct msg_queue *msq,
1599                                 struct msg_msg *msg,
1600                                 struct task_struct *target,
1601                                 long type, int mode);
1602
1603        int (*shm_alloc_security) (struct shmid_kernel *shp);
1604        void (*shm_free_security) (struct shmid_kernel *shp);
1605        int (*shm_associate) (struct shmid_kernel *shp, int shmflg);
1606        int (*shm_shmctl) (struct shmid_kernel *shp, int cmd);
1607        int (*shm_shmat) (struct shmid_kernel *shp,
1608                          char __user *shmaddr, int shmflg);
1609
1610        int (*sem_alloc_security) (struct sem_array *sma);
1611        void (*sem_free_security) (struct sem_array *sma);
1612        int (*sem_associate) (struct sem_array *sma, int semflg);
1613        int (*sem_semctl) (struct sem_array *sma, int cmd);
1614        int (*sem_semop) (struct sem_array *sma,
1615                          struct sembuf *sops, unsigned nsops, int alter);
1616
1617        int (*netlink_send) (struct sock *sk, struct sk_buff *skb);
1618        int (*netlink_recv) (struct sk_buff *skb, int cap);
1619
1620        void (*d_instantiate) (struct dentry *dentry, struct inode *inode);
1621
1622        int (*getprocattr) (struct task_struct *p, char *name, char **value);
1623        int (*setprocattr) (struct task_struct *p, char *name, void *value, size_t size);
1624        int (*secid_to_secctx) (u32 secid, char **secdata, u32 *seclen);
1625        int (*secctx_to_secid) (const char *secdata, u32 seclen, u32 *secid);
1626        void (*release_secctx) (char *secdata, u32 seclen);
1627
1628        int (*inode_notifysecctx)(struct inode *inode, void *ctx, u32 ctxlen);
1629        int (*inode_setsecctx)(struct dentry *dentry, void *ctx, u32 ctxlen);
1630        int (*inode_getsecctx)(struct inode *inode, void **ctx, u32 *ctxlen);
1631
1632#ifdef CONFIG_SECURITY_NETWORK
1633        int (*unix_stream_connect) (struct socket *sock,
1634                                    struct socket *other, struct sock *newsk);
1635        int (*unix_may_send) (struct socket *sock, struct socket *other);
1636
1637        int (*socket_create) (int family, int type, int protocol, int kern);
1638        int (*socket_post_create) (struct socket *sock, int family,
1639                                   int type, int protocol, int kern);
1640        int (*socket_bind) (struct socket *sock,
1641                            struct sockaddr *address, int addrlen);
1642        int (*socket_connect) (struct socket *sock,
1643                               struct sockaddr *address, int addrlen);
1644        int (*socket_listen) (struct socket *sock, int backlog);
1645        int (*socket_accept) (struct socket *sock, struct socket *newsock);
1646        int (*socket_sendmsg) (struct socket *sock,
1647                               struct msghdr *msg, int size);
1648        int (*socket_recvmsg) (struct socket *sock,
1649                               struct msghdr *msg, int size, int flags);
1650        int (*socket_getsockname) (struct socket *sock);
1651        int (*socket_getpeername) (struct socket *sock);
1652        int (*socket_getsockopt) (struct socket *sock, int level, int optname);
1653        int (*socket_setsockopt) (struct socket *sock, int level, int optname);
1654        int (*socket_shutdown) (struct socket *sock, int how);
1655        int (*socket_sock_rcv_skb) (struct sock *sk, struct sk_buff *skb);
1656        int (*socket_getpeersec_stream) (struct socket *sock, char __user *optval, int __user *optlen, unsigned len);
1657        int (*socket_getpeersec_dgram) (struct socket *sock, struct sk_buff *skb, u32 *secid);
1658        int (*sk_alloc_security) (struct sock *sk, int family, gfp_t priority);
1659        void (*sk_free_security) (struct sock *sk);
1660        void (*sk_clone_security) (const struct sock *sk, struct sock *newsk);
1661        void (*sk_getsecid) (struct sock *sk, u32 *secid);
1662        void (*sock_graft) (struct sock *sk, struct socket *parent);
1663        int (*inet_conn_request) (struct sock *sk, struct sk_buff *skb,
1664                                  struct request_sock *req);
1665        void (*inet_csk_clone) (struct sock *newsk, const struct request_sock *req);
1666        void (*inet_conn_established) (struct sock *sk, struct sk_buff *skb);
1667        void (*req_classify_flow) (const struct request_sock *req, struct flowi *fl);
1668        int (*tun_dev_create)(void);
1669        void (*tun_dev_post_create)(struct sock *sk);
1670        int (*tun_dev_attach)(struct sock *sk);
1671#endif  /* CONFIG_SECURITY_NETWORK */
1672
1673#ifdef CONFIG_SECURITY_NETWORK_XFRM
1674        int (*xfrm_policy_alloc_security) (struct xfrm_sec_ctx **ctxp,
1675                        struct xfrm_user_sec_ctx *sec_ctx);
1676        int (*xfrm_policy_clone_security) (struct xfrm_sec_ctx *old_ctx, struct xfrm_sec_ctx **new_ctx);
1677        void (*xfrm_policy_free_security) (struct xfrm_sec_ctx *ctx);
1678        int (*xfrm_policy_delete_security) (struct xfrm_sec_ctx *ctx);
1679        int (*xfrm_state_alloc_security) (struct xfrm_state *x,
1680                struct xfrm_user_sec_ctx *sec_ctx,
1681                u32 secid);
1682        void (*xfrm_state_free_security) (struct xfrm_state *x);
1683        int (*xfrm_state_delete_security) (struct xfrm_state *x);
1684        int (*xfrm_policy_lookup) (struct xfrm_sec_ctx *ctx, u32 fl_secid, u8 dir);
1685        int (*xfrm_state_pol_flow_match) (struct xfrm_state *x,
1686                                          struct xfrm_policy *xp,
1687                                          struct flowi *fl);
1688        int (*xfrm_decode_session) (struct sk_buff *skb, u32 *secid, int ckall);
1689#endif  /* CONFIG_SECURITY_NETWORK_XFRM */
1690
1691        /* key management security hooks */
1692#ifdef CONFIG_KEYS
1693        int (*key_alloc) (struct key *key, const struct cred *cred, unsigned long flags);
1694        void (*key_free) (struct key *key);
1695        int (*key_permission) (key_ref_t key_ref,
1696                               const struct cred *cred,
1697                               key_perm_t perm);
1698        int (*key_getsecurity)(struct key *key, char **_buffer);
1699        int (*key_session_to_parent)(const struct cred *cred,
1700                                     const struct cred *parent_cred,
1701                                     struct key *key);
1702#endif  /* CONFIG_KEYS */
1703
1704#ifdef CONFIG_AUDIT
1705        int (*audit_rule_init) (u32 field, u32 op, char *rulestr, void **lsmrule);
1706        int (*audit_rule_known) (struct audit_krule *krule);
1707        int (*audit_rule_match) (u32 secid, u32 field, u32 op, void *lsmrule,
1708                                 struct audit_context *actx);
1709        void (*audit_rule_free) (void *lsmrule);
1710#endif /* CONFIG_AUDIT */
1711};
1712
1713/* prototypes */
1714extern int security_init(void);
1715extern int security_module_enable(struct security_operations *ops);
1716extern int register_security(struct security_operations *ops);
1717
1718/* Security operations */
1719int security_ptrace_access_check(struct task_struct *child, unsigned int mode);
1720int security_ptrace_traceme(struct task_struct *parent);
1721int security_capget(struct task_struct *target,
1722                    kernel_cap_t *effective,
1723                    kernel_cap_t *inheritable,
1724                    kernel_cap_t *permitted);
1725int security_capset(struct cred *new, const struct cred *old,
1726                    const kernel_cap_t *effective,
1727                    const kernel_cap_t *inheritable,
1728                    const kernel_cap_t *permitted);
1729int security_capable(int cap);
1730int security_real_capable(struct task_struct *tsk, int cap);
1731int security_real_capable_noaudit(struct task_struct *tsk, int cap);
1732int security_acct(struct file *file);
1733int security_sysctl(struct ctl_table *table, int op);
1734int security_quotactl(int cmds, int type, int id, struct super_block *sb);
1735int security_quota_on(struct dentry *dentry);
1736int security_syslog(int type);
1737int security_settime(struct timespec *ts, struct timezone *tz);
1738int security_vm_enough_memory(long pages);
1739int security_vm_enough_memory_mm(struct mm_struct *mm, long pages);
1740int security_vm_enough_memory_kern(long pages);
1741int security_bprm_set_creds(struct linux_binprm *bprm);
1742int security_bprm_check(struct linux_binprm *bprm);
1743void security_bprm_committing_creds(struct linux_binprm *bprm);
1744void security_bprm_committed_creds(struct linux_binprm *bprm);
1745int security_bprm_secureexec(struct linux_binprm *bprm);
1746int security_sb_alloc(struct super_block *sb);
1747void security_sb_free(struct super_block *sb);
1748int security_sb_copy_data(char *orig, char *copy);
1749int security_sb_kern_mount(struct super_block *sb, int flags, void *data);
1750int security_sb_show_options(struct seq_file *m, struct super_block *sb);
1751int security_sb_statfs(struct dentry *dentry);
1752int security_sb_mount(char *dev_name, struct path *path,
1753                      char *type, unsigned long flags, void *data);
1754int security_sb_check_sb(struct vfsmount *mnt, struct path *path);
1755int security_sb_umount(struct vfsmount *mnt, int flags);
1756void security_sb_umount_close(struct vfsmount *mnt);
1757void security_sb_umount_busy(struct vfsmount *mnt);
1758void security_sb_post_remount(struct vfsmount *mnt, unsigned long flags, void *data);
1759void security_sb_post_addmount(struct vfsmount *mnt, struct path *mountpoint);
1760int security_sb_pivotroot(struct path *old_path, struct path *new_path);
1761void security_sb_post_pivotroot(struct path *old_path, struct path *new_path);
1762int security_sb_set_mnt_opts(struct super_block *sb, struct security_mnt_opts *opts);
1763void security_sb_clone_mnt_opts(const struct super_block *oldsb,
1764                                struct super_block *newsb);
1765int security_sb_parse_opts_str(char *options, struct security_mnt_opts *opts);
1766
1767int security_inode_alloc(struct inode *inode);
1768void security_inode_free(struct inode *inode);
1769int security_inode_init_security(struct inode *inode, struct inode *dir,
1770                                  char **name, void **value, size_t *len);
1771int security_inode_create(struct inode *dir, struct dentry *dentry, int mode);
1772int security_inode_link(struct dentry *old_dentry, struct inode *dir,
1773                         struct dentry *new_dentry);
1774int security_inode_unlink(struct inode *dir, struct dentry *dentry);
1775int security_inode_symlink(struct inode *dir, struct dentry *dentry,
1776                           const char *old_name);
1777int security_inode_mkdir(struct inode *dir, struct dentry *dentry, int mode);
1778int security_inode_rmdir(struct inode *dir, struct dentry *dentry);
1779int security_inode_mknod(struct inode *dir, struct dentry *dentry, int mode, dev_t dev);
1780int security_inode_rename(struct inode *old_dir, struct dentry *old_dentry,
1781                          struct inode *new_dir, struct dentry *new_dentry);
1782int security_inode_readlink(struct dentry *dentry);
1783int security_inode_follow_link(struct dentry *dentry, struct nameidata *nd);
1784int security_inode_permission(struct inode *inode, int mask);
1785int security_inode_setattr(struct dentry *dentry, struct iattr *attr);
1786int security_inode_getattr(struct vfsmount *mnt, struct dentry *dentry);
1787void security_inode_delete(struct inode *inode);
1788int security_inode_setxattr(struct dentry *dentry, const char *name,
1789                            const void *value, size_t size, int flags);
1790void security_inode_post_setxattr(struct dentry *dentry, const char *name,
1791                                  const void *value, size_t size, int flags);
1792int security_inode_getxattr(struct dentry *dentry, const char *name);
1793int security_inode_listxattr(struct dentry *dentry);
1794int security_inode_removexattr(struct dentry *dentry, const char *name);
1795int security_inode_need_killpriv(struct dentry *dentry);
1796int security_inode_killpriv(struct dentry *dentry);
1797int security_inode_getsecurity(const struct inode *inode, const char *name, void **buffer, bool alloc);
1798int security_inode_setsecurity(struct inode *inode, const char *name, const void *value, size_t size, int flags);
1799int security_inode_listsecurity(struct inode *inode, char *buffer, size_t buffer_size);
1800void security_inode_getsecid(const struct inode *inode, u32 *secid);
1801int security_file_permission(struct file *file, int mask);
1802int security_file_alloc(struct file *file);
1803void security_file_free(struct file *file);
1804int security_file_ioctl(struct file *file, unsigned int cmd, unsigned long arg);
1805int security_file_mmap(struct file *file, unsigned long reqprot,
1806                        unsigned long prot, unsigned long flags,
1807                        unsigned long addr, unsigned long addr_only);
1808int security_file_mprotect(struct vm_area_struct *vma, unsigned long reqprot,
1809                           unsigned long prot);
1810int security_file_lock(struct file *file, unsigned int cmd);
1811int security_file_fcntl(struct file *file, unsigned int cmd, unsigned long arg);
1812int security_file_set_fowner(struct file *file);
1813int security_file_send_sigiotask(struct task_struct *tsk,
1814                                 struct fown_struct *fown, int sig);
1815int security_file_receive(struct file *file);
1816int security_dentry_open(struct file *file, const struct cred *cred);
1817int security_task_create(unsigned long clone_flags);
1818int security_cred_alloc_blank(struct cred *cred, gfp_t gfp);
1819void security_cred_free(struct cred *cred);
1820int security_prepare_creds(struct cred *new, const struct cred *old, gfp_t gfp);
1821void security_commit_creds(struct cred *new, const struct cred *old);
1822void security_transfer_creds(struct cred *new, const struct cred *old);
1823int security_kernel_act_as(struct cred *new, u32 secid);
1824int security_kernel_create_files_as(struct cred *new, struct inode *inode);
1825int security_kernel_module_request(void);
1826int security_task_setuid(uid_t id0, uid_t id1, uid_t id2, int flags);
1827int security_task_fix_setuid(struct cred *new, const struct cred *old,
1828                             int flags);
1829int security_task_setgid(gid_t id0, gid_t id1, gid_t id2, int flags);
1830int security_task_setpgid(struct task_struct *p, pid_t pgid);
1831int security_task_getpgid(struct task_struct *p);
1832int security_task_getsid(struct task_struct *p);
1833void security_task_getsecid(struct task_struct *p, u32 *secid);
1834int security_task_setgroups(struct group_info *group_info);
1835int security_task_setnice(struct task_struct *p, int nice);
1836int security_task_setioprio(struct task_struct *p, int ioprio);
1837int security_task_getioprio(struct task_struct *p);
1838int security_task_setrlimit(unsigned int resource, struct rlimit *new_rlim);
1839int security_task_setscheduler(struct task_struct *p,
1840                                int policy, struct sched_param *lp);
1841int security_task_getscheduler(struct task_struct *p);
1842int security_task_movememory(struct task_struct *p);
1843int security_task_kill(struct task_struct *p, struct siginfo *info,
1844                        int sig, u32 secid);
1845int security_task_wait(struct task_struct *p);
1846int security_task_prctl(int option, unsigned long arg2, unsigned long arg3,
1847                        unsigned long arg4, unsigned long arg5);
1848void security_task_to_inode(struct task_struct *p, struct inode *inode);
1849int security_ipc_permission(struct kern_ipc_perm *ipcp, short flag);
1850void security_ipc_getsecid(struct kern_ipc_perm *ipcp, u32 *secid);
1851int security_msg_msg_alloc(struct msg_msg *msg);
1852void security_msg_msg_free(struct msg_msg *msg);
1853int security_msg_queue_alloc(struct msg_queue *msq);
1854void security_msg_queue_free(struct msg_queue *msq);
1855int security_msg_queue_associate(struct msg_queue *msq, int msqflg);
1856int security_msg_queue_msgctl(struct msg_queue *msq, int cmd);
1857int security_msg_queue_msgsnd(struct msg_queue *msq,
1858                              struct msg_msg *msg, int msqflg);
1859int security_msg_queue_msgrcv(struct msg_queue *msq, struct msg_msg *msg,
1860                              struct task_struct *target, long type, int mode);
1861int security_shm_alloc(struct shmid_kernel *shp);
1862void security_shm_free(struct shmid_kernel *shp);
1863int security_shm_associate(struct shmid_kernel *shp, int shmflg);
1864int security_shm_shmctl(struct shmid_kernel *shp, int cmd);
1865int security_shm_shmat(struct shmid_kernel *shp, char __user *shmaddr, int shmflg);
1866int security_sem_alloc(struct sem_array *sma);
1867void security_sem_free(struct sem_array *sma);
1868int security_sem_associate(struct sem_array *sma, int semflg);
1869int security_sem_semctl(struct sem_array *sma, int cmd);
1870int security_sem_semop(struct sem_array *sma, struct sembuf *sops,
1871                        unsigned nsops, int alter);
1872void security_d_instantiate(struct dentry *dentry, struct inode *inode);
1873int security_getprocattr(struct task_struct *p, char *name, char **value);
1874int security_setprocattr(struct task_struct *p, char *name, void *value, size_t size);
1875int security_netlink_send(struct sock *sk, struct sk_buff *skb);
1876int security_netlink_recv(struct sk_buff *skb, int cap);
1877int security_secid_to_secctx(u32 secid, char **secdata, u32 *seclen);
1878int security_secctx_to_secid(const char *secdata, u32 seclen, u32 *secid);
1879void security_release_secctx(char *secdata, u32 seclen);
1880
1881int security_inode_notifysecctx(struct inode *inode, void *ctx, u32 ctxlen);
1882int security_inode_setsecctx(struct dentry *dentry, void *ctx, u32 ctxlen);
1883int security_inode_getsecctx(struct inode *inode, void **ctx, u32 *ctxlen);
1884#else /* CONFIG_SECURITY */
1885struct security_mnt_opts {
1886};
1887
1888static inline void security_init_mnt_opts(struct security_mnt_opts *opts)
1889{
1890}
1891
1892static inline void security_free_mnt_opts(struct security_mnt_opts *opts)
1893{
1894}
1895
1896/*
1897 * This is the default capabilities functionality.  Most of these functions
1898 * are just stubbed out, but a few must call the proper capable code.
1899 */
1900
1901static inline int security_init(void)
1902{
1903        return 0;
1904}
1905
1906static inline int security_ptrace_access_check(struct task_struct *child,
1907                                             unsigned int mode)
1908{
1909        return cap_ptrace_access_check(child, mode);
1910}
1911
1912static inline int security_ptrace_traceme(struct task_struct *parent)
1913{
1914        return cap_ptrace_traceme(parent);
1915}
1916
1917static inline int security_capget(struct task_struct *target,
1918                                   kernel_cap_t *effective,
1919                                   kernel_cap_t *inheritable,
1920                                   kernel_cap_t *permitted)
1921{
1922        return cap_capget(target, effective, inheritable, permitted);
1923}
1924
1925static inline int security_capset(struct cred *new,
1926                                   const struct cred *old,
1927                                   const kernel_cap_t *effective,
1928                                   const kernel_cap_t *inheritable,
1929                                   const kernel_cap_t *permitted)
1930{
1931        return cap_capset(new, old, effective, inheritable, permitted);
1932}
1933
1934static inline int security_capable(int cap)
1935{
1936        return cap_capable(current, current_cred(), cap, SECURITY_CAP_AUDIT);
1937}
1938
1939static inline int security_real_capable(struct task_struct *tsk, int cap)
1940{
1941        int ret;
1942
1943        rcu_read_lock();
1944        ret = cap_capable(tsk, __task_cred(tsk), cap, SECURITY_CAP_AUDIT);
1945        rcu_read_unlock();
1946        return ret;
1947}
1948
1949static inline
1950int security_real_capable_noaudit(struct task_struct *tsk, int cap)
1951{
1952        int ret;
1953
1954        rcu_read_lock();
1955        ret = cap_capable(tsk, __task_cred(tsk), cap,
1956                               SECURITY_CAP_NOAUDIT);
1957        rcu_read_unlock();
1958        return ret;
1959}
1960
1961static inline int security_acct(struct file *file)
1962{
1963        return 0;
1964}
1965
1966static inline int security_sysctl(struct ctl_table *table, int op)
1967{
1968        return 0;
1969}
1970
1971static inline int security_quotactl(int cmds, int type, int id,
1972                                     struct super_block *sb)
1973{
1974        return 0;
1975}
1976
1977static inline int security_quota_on(struct dentry *dentry)
1978{
1979        return 0;
1980}
1981
1982static inline int security_syslog(int type)
1983{
1984        return cap_syslog(type);
1985}
1986
1987static inline int security_settime(struct timespec *ts, struct timezone *tz)
1988{
1989        return cap_settime(ts, tz);
1990}
1991
1992static inline int security_vm_enough_memory(long pages)
1993{
1994        WARN_ON(current->mm == NULL);
1995        return cap_vm_enough_memory(current->mm, pages);
1996}
1997
1998static inline int security_vm_enough_memory_mm(struct mm_struct *mm, long pages)
1999{
2000        WARN_ON(mm == NULL);
2001        return cap_vm_enough_memory(mm, pages);
2002}
2003
2004static inline int security_vm_enough_memory_kern(long pages)
2005{
2006        /* If current->mm is a kernel thread then we will pass NULL,
2007           for this specific case that is fine */
2008        return cap_vm_enough_memory(current->mm, pages);
2009}
2010
2011static inline int security_bprm_set_creds(struct linux_binprm *bprm)
2012{
2013        return cap_bprm_set_creds(bprm);
2014}
2015
2016static inline int security_bprm_check(struct linux_binprm *bprm)
2017{
2018        return 0;
2019}
2020
2021static inline void security_bprm_committing_creds(struct linux_binprm *bprm)
2022{
2023}
2024
2025static inline void security_bprm_committed_creds(struct linux_binprm *bprm)
2026{
2027}
2028
2029static inline int security_bprm_secureexec(struct linux_binprm *bprm)
2030{
2031        return cap_bprm_secureexec(bprm);
2032}
2033
2034static inline int security_sb_alloc(struct super_block *sb)
2035{
2036        return 0;
2037}
2038
2039static inline void security_sb_free(struct super_block *sb)
2040{ }
2041
2042static inline int security_sb_copy_data(char *orig, char *copy)
2043{
2044        return 0;
2045}
2046
2047static inline int security_sb_kern_mount(struct super_block *sb, int flags, void *data)
2048{
2049        return 0;
2050}
2051
2052static inline int security_sb_show_options(struct seq_file *m,
2053                                           struct super_block *sb)
2054{
2055        return 0;
2056}
2057
2058static inline int security_sb_statfs(struct dentry *dentry)
2059{
2060        return 0;
2061}
2062
2063static inline int security_sb_mount(char *dev_name, struct path *path,
2064                                    char *type, unsigned long flags,
2065                                    void *data)
2066{
2067        return 0;
2068}
2069
2070static inline int security_sb_check_sb(struct vfsmount *mnt,
2071                                       struct path *path)
2072{
2073        return 0;
2074}
2075
2076static inline int security_sb_umount(struct vfsmount *mnt, int flags)
2077{
2078        return 0;
2079}
2080
2081static inline void security_sb_umount_close(struct vfsmount *mnt)
2082{ }
2083
2084static inline void security_sb_umount_busy(struct vfsmount *mnt)
2085{ }
2086
2087static inline void security_sb_post_remount(struct vfsmount *mnt,
2088                                             unsigned long flags, void *data)
2089{ }
2090
2091static inline void security_sb_post_addmount(struct vfsmount *mnt,
2092                                             struct path *mountpoint)
2093{ }
2094
2095static inline int security_sb_pivotroot(struct path *old_path,
2096                                        struct path *new_path)
2097{
2098        return 0;
2099}
2100
2101static inline void security_sb_post_pivotroot(struct path *old_path,
2102                                              struct path *new_path)
2103{ }
2104
2105static inline int security_sb_set_mnt_opts(struct super_block *sb,
2106                                           struct security_mnt_opts *opts)
2107{
2108        return 0;
2109}
2110
2111static inline void security_sb_clone_mnt_opts(const struct super_block *oldsb,
2112                                              struct super_block *newsb)
2113{ }
2114
2115static inline int security_sb_parse_opts_str(char *options, struct security_mnt_opts *opts)
2116{
2117        return 0;
2118}
2119
2120static inline int security_inode_alloc(struct inode *inode)
2121{
2122        return 0;
2123}
2124
2125static inline void security_inode_free(struct inode *inode)
2126{ }
2127
2128static inline int security_inode_init_security(struct inode *inode,
2129                                                struct inode *dir,
2130                                                char **name,
2131                                                void **value,
2132                                                size_t *len)
2133{
2134        return -EOPNOTSUPP;
2135}
2136
2137static inline int security_inode_create(struct inode *dir,
2138                                         struct dentry *dentry,
2139                                         int mode)
2140{
2141        return 0;
2142}
2143
2144static inline int security_inode_link(struct dentry *old_dentry,
2145                                       struct inode *dir,
2146                                       struct dentry *new_dentry)
2147{
2148        return 0;
2149}
2150
2151static inline int security_inode_unlink(struct inode *dir,
2152                                         struct dentry *dentry)
2153{
2154        return 0;
2155}
2156
2157static inline int security_inode_symlink(struct inode *dir,
2158                                          struct dentry *dentry,
2159                                          const char *old_name)
2160{
2161        return 0;
2162}
2163
2164static inline int security_inode_mkdir(struct inode *dir,
2165                                        struct dentry *dentry,
2166                                        int mode)
2167{
2168        return 0;
2169}
2170
2171static inline int security_inode_rmdir(struct inode *dir,
2172                                        struct dentry *dentry)
2173{
2174        return 0;
2175}
2176
2177static inline int security_inode_mknod(struct inode *dir,
2178                                        struct dentry *dentry,
2179                                        int mode, dev_t dev)
2180{
2181        return 0;
2182}
2183
2184static inline int security_inode_rename(struct inode *old_dir,
2185                                         struct dentry *old_dentry,
2186                                         struct inode *new_dir,
2187                                         struct dentry *new_dentry)
2188{
2189        return 0;
2190}
2191
2192static inline int security_inode_readlink(struct dentry *dentry)
2193{
2194        return 0;
2195}
2196
2197static inline int security_inode_follow_link(struct dentry *dentry,
2198                                              struct nameidata *nd)
2199{
2200        return 0;
2201}
2202
2203static inline int security_inode_permission(struct inode *inode, int mask)
2204{
2205        return 0;
2206}
2207
2208static inline int security_inode_setattr(struct dentry *dentry,
2209                                          struct iattr *attr)
2210{
2211        return 0;
2212}
2213
2214static inline int security_inode_getattr(struct vfsmount *mnt,
2215                                          struct dentry *dentry)
2216{
2217        return 0;
2218}
2219
2220static inline void security_inode_delete(struct inode *inode)
2221{ }
2222
2223static inline int security_inode_setxattr(struct dentry *dentry,
2224                const char *name, const void *value, size_t size, int flags)
2225{
2226        return cap_inode_setxattr(dentry, name, value, size, flags);
2227}
2228
2229static inline void security_inode_post_setxattr(struct dentry *dentry,
2230                const char *name, const void *value, size_t size, int flags)
2231{ }
2232
2233static inline int security_inode_getxattr(struct dentry *dentry,
2234                        const char *name)
2235{
2236        return 0;
2237}
2238
2239static inline int security_inode_listxattr(struct dentry *dentry)
2240{
2241        return 0;
2242}
2243
2244static inline int security_inode_removexattr(struct dentry *dentry,
2245                        const char *name)
2246{
2247        return cap_inode_removexattr(dentry, name);
2248}
2249
2250static inline int security_inode_need_killpriv(struct dentry *dentry)
2251{
2252        return cap_inode_need_killpriv(dentry);
2253}
2254
2255static inline int security_inode_killpriv(struct dentry *dentry)
2256{
2257        return cap_inode_killpriv(dentry);
2258}
2259
2260static inline int security_inode_getsecurity(const struct inode *inode, const char *name, void **buffer, bool alloc)
2261{
2262        return -EOPNOTSUPP;
2263}
2264
2265static inline int security_inode_setsecurity(struct inode *inode, const char *name, const void *value, size_t size, int flags)
2266{
2267        return -EOPNOTSUPP;
2268}
2269
2270static inline int security_inode_listsecurity(struct inode *inode, char *buffer, size_t buffer_size)
2271{
2272        return 0;
2273}
2274
2275static inline void security_inode_getsecid(const struct inode *inode, u32 *secid)
2276{
2277        *secid = 0;
2278}
2279
2280static inline int security_file_permission(struct file *file, int mask)
2281{
2282        return 0;
2283}
2284
2285static inline int security_file_alloc(struct file *file)
2286{
2287        return 0;
2288}
2289
2290static inline void security_file_free(struct file *file)
2291{ }
2292
2293static inline int security_file_ioctl(struct file *file, unsigned int cmd,
2294                                      unsigned long arg)
2295{
2296        return 0;
2297}
2298
2299static inline int security_file_mmap(struct file *file, unsigned long reqprot,
2300                                     unsigned long prot,
2301                                     unsigned long flags,
2302                                     unsigned long addr,
2303                                     unsigned long addr_only)
2304{
2305        return cap_file_mmap(file, reqprot, prot, flags, addr, addr_only);
2306}
2307
2308static inline int security_file_mprotect(struct vm_area_struct *vma,
2309                                         unsigned long reqprot,
2310                                         unsigned long prot)
2311{
2312        return 0;
2313}
2314
2315static inline int security_file_lock(struct file *file, unsigned int cmd)
2316{
2317        return 0;
2318}
2319
2320static inline int security_file_fcntl(struct file *file, unsigned int cmd,
2321                                      unsigned long arg)
2322{
2323        return 0;
2324}
2325
2326static inline int security_file_set_fowner(struct file *file)
2327{
2328        return 0;
2329}
2330
2331static inline int security_file_send_sigiotask(struct task_struct *tsk,
2332                                               struct fown_struct *fown,
2333                                               int sig)
2334{
2335        return 0;
2336}
2337
2338static inline int security_file_receive(struct file *file)
2339{
2340        return 0;
2341}
2342
2343static inline int security_dentry_open(struct file *file,
2344                                       const struct cred *cred)
2345{
2346        return 0;
2347}
2348
2349static inline int security_task_create(unsigned long clone_flags)
2350{
2351        return 0;
2352}
2353
2354static inline int security_cred_alloc_blank(struct cred *cred, gfp_t gfp)
2355{
2356        return 0;
2357}
2358
2359static inline void security_cred_free(struct cred *cred)
2360{ }
2361
2362static inline int security_prepare_creds(struct cred *new,
2363                                         const struct cred *old,
2364                                         gfp_t gfp)
2365{
2366        return 0;
2367}
2368
2369static inline void security_commit_creds(struct cred *new,
2370                                         const struct cred *old)
2371{
2372}
2373
2374static inline void security_transfer_creds(struct cred *new,
2375                                           const struct cred *old)
2376{
2377}
2378
2379static inline int security_kernel_act_as(struct cred *cred, u32 secid)
2380{
2381        return 0;
2382}
2383
2384static inline int security_kernel_create_files_as(struct cred *cred,
2385                                                  struct inode *inode)
2386{
2387        return 0;
2388}
2389
2390static inline int security_kernel_module_request(void)
2391{
2392        return 0;
2393}
2394
2395static inline int security_task_setuid(uid_t id0, uid_t id1, uid_t id2,
2396                                       int flags)
2397{
2398        return 0;
2399}
2400
2401static inline int security_task_fix_setuid(struct cred *new,
2402                                           const struct cred *old,
2403                                           int flags)
2404{
2405        return cap_task_fix_setuid(new, old, flags);
2406}
2407
2408static inline int security_task_setgid(gid_t id0, gid_t id1, gid_t id2,
2409                                       int flags)
2410{
2411        return 0;
2412}
2413
2414static inline int security_task_setpgid(struct task_struct *p, pid_t pgid)
2415{
2416        return 0;
2417}
2418
2419static inline int security_task_getpgid(struct task_struct *p)
2420{
2421        return 0;
2422}
2423
2424static inline int security_task_getsid(struct task_struct *p)
2425{
2426        return 0;
2427}
2428
2429static inline void security_task_getsecid(struct task_struct *p, u32 *secid)
2430{
2431        *secid = 0;
2432}
2433
2434static inline int security_task_setgroups(struct group_info *group_info)
2435{
2436        return 0;
2437}
2438
2439static inline int security_task_setnice(struct task_struct *p, int nice)
2440{
2441        return cap_task_setnice(p, nice);
2442}
2443
2444static inline int security_task_setioprio(struct task_struct *p, int ioprio)
2445{
2446        return cap_task_setioprio(p, ioprio);
2447}
2448
2449static inline int security_task_getioprio(struct task_struct *p)
2450{
2451        return 0;
2452}
2453
2454static inline int security_task_setrlimit(unsigned int resource,
2455                                          struct rlimit *new_rlim)
2456{
2457        return 0;
2458}
2459
2460static inline int security_task_setscheduler(struct task_struct *p,
2461                                             int policy,
2462                                             struct sched_param *lp)
2463{
2464        return cap_task_setscheduler(p, policy, lp);
2465}
2466
2467static inline int security_task_getscheduler(struct task_struct *p)
2468{
2469        return 0;
2470}
2471
2472static inline int security_task_movememory(struct task_struct *p)
2473{
2474        return 0;
2475}
2476
2477static inline int security_task_kill(struct task_struct *p,
2478                                     struct siginfo *info, int sig,
2479                                     u32 secid)
2480{
2481        return 0;
2482}
2483
2484static inline int security_task_wait(struct task_struct *p)
2485{
2486        return 0;
2487}
2488
2489static inline int security_task_prctl(int option, unsigned long arg2,
2490                                      unsigned long arg3,
2491                                      unsigned long arg4,
2492                                      unsigned long arg5)
2493{
2494        return cap_task_prctl(option, arg2, arg3, arg3, arg5);
2495}
2496
2497static inline void security_task_to_inode(struct task_struct *p, struct inode *inode)
2498{ }
2499
2500static inline int security_ipc_permission(struct kern_ipc_perm *ipcp,
2501                                          short flag)
2502{
2503        return 0;
2504}
2505
2506static inline void security_ipc_getsecid(struct kern_ipc_perm *ipcp, u32 *secid)
2507{
2508        *secid = 0;
2509}
2510
2511static inline int security_msg_msg_alloc(struct msg_msg *msg)
2512{
2513        return 0;
2514}
2515
2516static inline void security_msg_msg_free(struct msg_msg *msg)
2517{ }
2518
2519static inline int security_msg_queue_alloc(struct msg_queue *msq)
2520{
2521        return 0;
2522}
2523
2524static inline void security_msg_queue_free(struct msg_queue *msq)
2525{ }
2526
2527static inline int security_msg_queue_associate(struct msg_queue *msq,
2528                                               int msqflg)
2529{
2530        return 0;
2531}
2532
2533static inline int security_msg_queue_msgctl(struct msg_queue *msq, int cmd)
2534{
2535        return 0;
2536}
2537
2538static inline int security_msg_queue_msgsnd(struct msg_queue *msq,
2539                                            struct msg_msg *msg, int msqflg)
2540{
2541        return 0;
2542}
2543
2544static inline int security_msg_queue_msgrcv(struct msg_queue *msq,
2545                                            struct msg_msg *msg,
2546                                            struct task_struct *target,
2547                                            long type, int mode)
2548{
2549        return 0;
2550}
2551
2552static inline int security_shm_alloc(struct shmid_kernel *shp)
2553{
2554        return 0;
2555}
2556
2557static inline void security_shm_free(struct shmid_kernel *shp)
2558{ }
2559
2560static inline int security_shm_associate(struct shmid_kernel *shp,
2561                                         int shmflg)
2562{
2563        return 0;
2564}
2565
2566static inline int security_shm_shmctl(struct shmid_kernel *shp, int cmd)
2567{
2568        return 0;
2569}
2570
2571static inline int security_shm_shmat(struct shmid_kernel *shp,
2572                                     char __user *shmaddr, int shmflg)
2573{
2574        return 0;
2575}
2576
2577static inline int security_sem_alloc(struct sem_array *sma)
2578{
2579        return 0;
2580}
2581
2582static inline void security_sem_free(struct sem_array *sma)
2583{ }
2584
2585static inline int security_sem_associate(struct sem_array *sma, int semflg)
2586{
2587        return 0;
2588}
2589
2590static inline int security_sem_semctl(struct sem_array *sma, int cmd)
2591{
2592        return 0;
2593}
2594
2595static inline int security_sem_semop(struct sem_array *sma,
2596                                     struct sembuf *sops, unsigned nsops,
2597                                     int alter)
2598{
2599        return 0;
2600}
2601
2602static inline void security_d_instantiate(struct dentry *dentry, struct inode *inode)
2603{ }
2604
2605static inline int security_getprocattr(struct task_struct *p, char *name, char **value)
2606{
2607        return -EINVAL;
2608}
2609
2610static inline int security_setprocattr(struct task_struct *p, char *name, void *value, size_t size)
2611{
2612        return -EINVAL;
2613}
2614
2615static inline int security_netlink_send(struct sock *sk, struct sk_buff *skb)
2616{
2617        return cap_netlink_send(sk, skb);
2618}
2619
2620static inline int security_netlink_recv(struct sk_buff *skb, int cap)
2621{
2622        return cap_netlink_recv(skb, cap);
2623}
2624
2625static inline int security_secid_to_secctx(u32 secid, char **secdata, u32 *seclen)
2626{
2627        return -EOPNOTSUPP;
2628}
2629
2630static inline int security_secctx_to_secid(const char *secdata,
2631                                           u32 seclen,
2632                                           u32 *secid)
2633{
2634        return -EOPNOTSUPP;
2635}
2636
2637static inline void security_release_secctx(char *secdata, u32 seclen)
2638{
2639}
2640
2641static inline int security_inode_notifysecctx(struct inode *inode, void *ctx, u32 ctxlen)
2642{
2643        return -EOPNOTSUPP;
2644}
2645static inline int security_inode_setsecctx(struct dentry *dentry, void *ctx, u32 ctxlen)
2646{
2647        return -EOPNOTSUPP;
2648}
2649static inline int security_inode_getsecctx(struct inode *inode, void **ctx, u32 *ctxlen)
2650{
2651        return -EOPNOTSUPP;
2652}
2653#endif  /* CONFIG_SECURITY */
2654
2655#ifdef CONFIG_SECURITY_NETWORK
2656
2657int security_unix_stream_connect(struct socket *sock, struct socket *other,
2658                                 struct sock *newsk);
2659int security_unix_may_send(struct socket *sock,  struct socket *other);
2660int security_socket_create(int family, int type, int protocol, int kern);
2661int security_socket_post_create(struct socket *sock, int family,
2662                                int type, int protocol, int kern);
2663int security_socket_bind(struct socket *sock, struct sockaddr *address, int addrlen);
2664int security_socket_connect(struct socket *sock, struct sockaddr *address, int addrlen);
2665int security_socket_listen(struct socket *sock, int backlog);
2666int security_socket_accept(struct socket *sock, struct socket *newsock);
2667int security_socket_sendmsg(struct socket *sock, struct msghdr *msg, int size);
2668int security_socket_recvmsg(struct socket *sock, struct msghdr *msg,
2669                            int size, int flags);
2670int security_socket_getsockname(struct socket *sock);
2671int security_socket_getpeername(struct socket *sock);
2672int security_socket_getsockopt(struct socket *sock, int level, int optname);
2673int security_socket_setsockopt(struct socket *sock, int level, int optname);
2674int security_socket_shutdown(struct socket *sock, int how);
2675int security_sock_rcv_skb(struct sock *sk, struct sk_buff *skb);
2676int security_socket_getpeersec_stream(struct socket *sock, char __user *optval,
2677                                      int __user *optlen, unsigned len);
2678int security_socket_getpeersec_dgram(struct socket *sock, struct sk_buff *skb, u32 *secid);
2679int security_sk_alloc(struct sock *sk, int family, gfp_t priority);
2680void security_sk_free(struct sock *sk);
2681void security_sk_clone(const struct sock *sk, struct sock *newsk);
2682void security_sk_classify_flow(struct sock *sk, struct flowi *fl);
2683void security_req_classify_flow(const struct request_sock *req, struct flowi *fl);
2684void security_sock_graft(struct sock*sk, struct socket *parent);
2685int security_inet_conn_request(struct sock *sk,
2686                        struct sk_buff *skb, struct request_sock *req);
2687void security_inet_csk_clone(struct sock *newsk,
2688                        const struct request_sock *req);
2689void security_inet_conn_established(struct sock *sk,
2690                        struct sk_buff *skb);
2691int security_tun_dev_create(void);
2692void security_tun_dev_post_create(struct sock *sk);
2693int security_tun_dev_attach(struct sock *sk);
2694
2695#else   /* CONFIG_SECURITY_NETWORK */
2696static inline int security_unix_stream_connect(struct socket *sock,
2697                                               struct socket *other,
2698                                               struct sock *newsk)
2699{
2700        return 0;
2701}
2702
2703static inline int security_unix_may_send(struct socket *sock,
2704                                         struct socket *other)
2705{
2706        return 0;
2707}
2708
2709static inline int security_socket_create(int family, int type,
2710                                         int protocol, int kern)
2711{
2712        return 0;
2713}
2714
2715static inline int security_socket_post_create(struct socket *sock,
2716                                              int family,
2717                                              int type,
2718                                              int protocol, int kern)
2719{
2720        return 0;
2721}
2722
2723static inline int security_socket_bind(struct socket *sock,
2724                                       struct sockaddr *address,
2725                                       int addrlen)
2726{
2727        return 0;
2728}
2729
2730static inline int security_socket_connect(struct socket *sock,
2731                                          struct sockaddr *address,
2732                                          int addrlen)
2733{
2734        return 0;
2735}
2736
2737static inline int security_socket_listen(struct socket *sock, int backlog)
2738{
2739        return 0;
2740}
2741
2742static inline int security_socket_accept(struct socket *sock,
2743                                         struct socket *newsock)
2744{
2745        return 0;
2746}
2747
2748static inline int security_socket_sendmsg(struct socket *sock,
2749                                          struct msghdr *msg, int size)
2750{
2751        return 0;
2752}
2753
2754static inline int security_socket_recvmsg(struct socket *sock,
2755                                          struct msghdr *msg, int size,
2756                                          int flags)
2757{
2758        return 0;
2759}
2760
2761static inline int security_socket_getsockname(struct socket *sock)
2762{
2763        return 0;
2764}
2765
2766static inline int security_socket_getpeername(struct socket *sock)
2767{
2768        return 0;
2769}
2770
2771static inline int security_socket_getsockopt(struct socket *sock,
2772                                             int level, int optname)
2773{
2774        return 0;
2775}
2776
2777static inline int security_socket_setsockopt(struct socket *sock,
2778                                             int level, int optname)
2779{
2780        return 0;
2781}
2782
2783static inline int security_socket_shutdown(struct socket *sock, int how)
2784{
2785        return 0;
2786}
2787static inline int security_sock_rcv_skb(struct sock *sk,
2788                                        struct sk_buff *skb)
2789{
2790        return 0;
2791}
2792
2793static inline int security_socket_getpeersec_stream(struct socket *sock, char __user *optval,
2794                                                    int __user *optlen, unsigned len)
2795{
2796        return -ENOPROTOOPT;
2797}
2798
2799static inline int security_socket_getpeersec_dgram(struct socket *sock, struct sk_buff *skb, u32 *secid)
2800{
2801        return -ENOPROTOOPT;
2802}
2803
2804static inline int security_sk_alloc(struct sock *sk, int family, gfp_t priority)
2805{
2806        return 0;
2807}
2808
2809static inline void security_sk_free(struct sock *sk)
2810{
2811}
2812
2813static inline void security_sk_clone(const struct sock *sk, struct sock *newsk)
2814{
2815}
2816
2817static inline void security_sk_classify_flow(struct sock *sk, struct flowi *fl)
2818{
2819}
2820
2821static inline void security_req_classify_flow(const struct request_sock *req, struct flowi *fl)
2822{
2823}
2824
2825static inline void security_sock_graft(struct sock *sk, struct socket *parent)
2826{
2827}
2828
2829static inline int security_inet_conn_request(struct sock *sk,
2830                        struct sk_buff *skb, struct request_sock *req)
2831{
2832        return 0;
2833}
2834
2835static inline void security_inet_csk_clone(struct sock *newsk,
2836                        const struct request_sock *req)
2837{
2838}
2839
2840static inline void security_inet_conn_established(struct sock *sk,
2841                        struct sk_buff *skb)
2842{
2843}
2844
2845static inline int security_tun_dev_create(void)
2846{
2847        return 0;
2848}
2849
2850static inline void security_tun_dev_post_create(struct sock *sk)
2851{
2852}
2853
2854static inline int security_tun_dev_attach(struct sock *sk)
2855{
2856        return 0;
2857}
2858#endif  /* CONFIG_SECURITY_NETWORK */
2859
2860#ifdef CONFIG_SECURITY_NETWORK_XFRM
2861
2862int security_xfrm_policy_alloc(struct xfrm_sec_ctx **ctxp, struct xfrm_user_sec_ctx *sec_ctx);
2863int security_xfrm_policy_clone(struct xfrm_sec_ctx *old_ctx, struct xfrm_sec_ctx **new_ctxp);
2864void security_xfrm_policy_free(struct xfrm_sec_ctx *ctx);
2865int security_xfrm_policy_delete(struct xfrm_sec_ctx *ctx);
2866int security_xfrm_state_alloc(struct xfrm_state *x, struct xfrm_user_sec_ctx *sec_ctx);
2867int security_xfrm_state_alloc_acquire(struct xfrm_state *x,
2868                                      struct xfrm_sec_ctx *polsec, u32 secid);
2869int security_xfrm_state_delete(struct xfrm_state *x);
2870void security_xfrm_state_free(struct xfrm_state *x);
2871int security_xfrm_policy_lookup(struct xfrm_sec_ctx *ctx, u32 fl_secid, u8 dir);
2872int security_xfrm_state_pol_flow_match(struct xfrm_state *x,
2873                                       struct xfrm_policy *xp, struct flowi *fl);
2874int security_xfrm_decode_session(struct sk_buff *skb, u32 *secid);
2875void security_skb_classify_flow(struct sk_buff *skb, struct flowi *fl);
2876
2877#else   /* CONFIG_SECURITY_NETWORK_XFRM */
2878
2879static inline int security_xfrm_policy_alloc(struct xfrm_sec_ctx **ctxp, struct xfrm_user_sec_ctx *sec_ctx)
2880{
2881        return 0;
2882}
2883
2884static inline int security_xfrm_policy_clone(struct xfrm_sec_ctx *old, struct xfrm_sec_ctx **new_ctxp)
2885{
2886        return 0;
2887}
2888
2889static inline void security_xfrm_policy_free(struct xfrm_sec_ctx *ctx)
2890{
2891}
2892
2893static inline int security_xfrm_policy_delete(struct xfrm_sec_ctx *ctx)
2894{
2895        return 0;
2896}
2897
2898static inline int security_xfrm_state_alloc(struct xfrm_state *x,
2899                                        struct xfrm_user_sec_ctx *sec_ctx)
2900{
2901        return 0;
2902}
2903
2904static inline int security_xfrm_state_alloc_acquire(struct xfrm_state *x,
2905                                        struct xfrm_sec_ctx *polsec, u32 secid)
2906{
2907        return 0;
2908}
2909
2910static inline void security_xfrm_state_free(struct xfrm_state *x)
2911{
2912}
2913
2914static inline int security_xfrm_state_delete(struct xfrm_state *x)
2915{
2916        return 0;
2917}
2918
2919static inline int security_xfrm_policy_lookup(struct xfrm_sec_ctx *ctx, u32 fl_secid, u8 dir)
2920{
2921        return 0;
2922}
2923
2924static inline int security_xfrm_state_pol_flow_match(struct xfrm_state *x,
2925                        struct xfrm_policy *xp, struct flowi *fl)
2926{
2927        return 1;
2928}
2929
2930static inline int security_xfrm_decode_session(struct sk_buff *skb, u32 *secid)
2931{
2932        return 0;
2933}
2934
2935static inline void security_skb_classify_flow(struct sk_buff *skb, struct flowi *fl)
2936{
2937}
2938
2939#endif  /* CONFIG_SECURITY_NETWORK_XFRM */
2940
2941#ifdef CONFIG_SECURITY_PATH
2942int security_path_unlink(struct path *dir, struct dentry *dentry);
2943int security_path_mkdir(struct path *dir, struct dentry *dentry, int mode);
2944int security_path_rmdir(struct path *dir, struct dentry *dentry);
2945int security_path_mknod(struct path *dir, struct dentry *dentry, int mode,
2946                        unsigned int dev);
2947int security_path_truncate(struct path *path, loff_t length,
2948                           unsigned int time_attrs);
2949int security_path_symlink(struct path *dir, struct dentry *dentry,
2950                          const char *old_name);
2951int security_path_link(struct dentry *old_dentry, struct path *new_dir,
2952                       struct dentry *new_dentry);
2953int security_path_rename(struct path *old_dir, struct dentry *old_dentry,
2954                         struct path *new_dir, struct dentry *new_dentry);
2955#else   /* CONFIG_SECURITY_PATH */
2956static inline int security_path_unlink(struct path *dir, struct dentry *dentry)
2957{
2958        return 0;
2959}
2960
2961static inline int security_path_mkdir(struct path *dir, struct dentry *dentry,
2962                                      int mode)
2963{
2964        return 0;
2965}
2966
2967static inline int security_path_rmdir(struct path *dir, struct dentry *dentry)
2968{
2969        return 0;
2970}
2971
2972static inline int security_path_mknod(struct path *dir, struct dentry *dentry,
2973                                      int mode, unsigned int dev)
2974{
2975        return 0;
2976}
2977
2978static inline int security_path_truncate(struct path *path, loff_t length,
2979                                         unsigned int time_attrs)
2980{
2981        return 0;
2982}
2983
2984static inline int security_path_symlink(struct path *dir, struct dentry *dentry,
2985                                        const char *old_name)
2986{
2987        return 0;
2988}
2989
2990static inline int security_path_link(struct dentry *old_dentry,
2991                                     struct path *new_dir,
2992                                     struct dentry *new_dentry)
2993{
2994        return 0;
2995}
2996
2997static inline int security_path_rename(struct path *old_dir,
2998                                       struct dentry *old_dentry,
2999                                       struct path *new_dir,
3000                                       struct dentry *new_dentry)
3001{
3002        return 0;
3003}
3004#endif  /* CONFIG_SECURITY_PATH */
3005
3006#ifdef CONFIG_KEYS
3007#ifdef CONFIG_SECURITY
3008
3009int security_key_alloc(struct key *key, const struct cred *cred, unsigned long flags);
3010void security_key_free(struct key *key);
3011int security_key_permission(key_ref_t key_ref,
3012                            const struct cred *cred, key_perm_t perm);
3013int security_key_getsecurity(struct key *key, char **_buffer);
3014int security_key_session_to_parent(const struct cred *cred,
3015                                   const struct cred *parent_cred,
3016                                   struct key *key);
3017
3018#else
3019
3020static inline int security_key_alloc(struct key *key,
3021                                     const struct cred *cred,
3022                                     unsigned long flags)
3023{
3024        return 0;
3025}
3026
3027static inline void security_key_free(struct key *key)
3028{
3029}
3030
3031static inline int security_key_permission(key_ref_t key_ref,
3032                                          const struct cred *cred,
3033                                          key_perm_t perm)
3034{
3035        return 0;
3036}
3037
3038static inline int security_key_getsecurity(struct key *key, char **_buffer)
3039{
3040        *_buffer = NULL;
3041        return 0;
3042}
3043
3044static inline int security_key_session_to_parent(const struct cred *cred,
3045                                                 const struct cred *parent_cred,
3046                                                 struct key *key)
3047{
3048        return 0;
3049}
3050
3051#endif
3052#endif /* CONFIG_KEYS */
3053
3054#ifdef CONFIG_AUDIT
3055#ifdef CONFIG_SECURITY
3056int security_audit_rule_init(u32 field, u32 op, char *rulestr, void **lsmrule);
3057int security_audit_rule_known(struct audit_krule *krule);
3058int security_audit_rule_match(u32 secid, u32 field, u32 op, void *lsmrule,
3059                              struct audit_context *actx);
3060void security_audit_rule_free(void *lsmrule);
3061
3062#else
3063
3064static inline int security_audit_rule_init(u32 field, u32 op, char *rulestr,
3065                                           void **lsmrule)
3066{
3067        return 0;
3068}
3069
3070static inline int security_audit_rule_known(struct audit_krule *krule)
3071{
3072        return 0;
3073}
3074
3075static inline int security_audit_rule_match(u32 secid, u32 field, u32 op,
3076                                   void *lsmrule, struct audit_context *actx)
3077{
3078        return 0;
3079}
3080
3081static inline void security_audit_rule_free(void *lsmrule)
3082{ }
3083
3084#endif /* CONFIG_SECURITY */
3085#endif /* CONFIG_AUDIT */
3086
3087#ifdef CONFIG_SECURITYFS
3088
3089extern struct dentry *securityfs_create_file(const char *name, mode_t mode,
3090                                             struct dentry *parent, void *data,
3091                                             const struct file_operations *fops);
3092extern struct dentry *securityfs_create_dir(const char *name, struct dentry *parent);
3093extern void securityfs_remove(struct dentry *dentry);
3094
3095#else /* CONFIG_SECURITYFS */
3096
3097static inline struct dentry *securityfs_create_dir(const char *name,
3098                                                   struct dentry *parent)
3099{
3100        return ERR_PTR(-ENODEV);
3101}
3102
3103static inline struct dentry *securityfs_create_file(const char *name,
3104                                                    mode_t mode,
3105                                                    struct dentry *parent,
3106                                                    void *data,
3107                                                    const struct file_operations *fops)
3108{
3109        return ERR_PTR(-ENODEV);
3110}
3111
3112static inline void securityfs_remove(struct dentry *dentry)
3113{}
3114
3115#endif
3116
3117#ifdef CONFIG_SECURITY
3118
3119static inline char *alloc_secdata(void)
3120{
3121        return (char *)get_zeroed_page(GFP_KERNEL);
3122}
3123
3124static inline void free_secdata(void *secdata)
3125{
3126        free_page((unsigned long)secdata);
3127}
3128
3129#else
3130
3131static inline char *alloc_secdata(void)
3132{
3133        return (char *)1;
3134}
3135
3136static inline void free_secdata(void *secdata)
3137{ }
3138#endif /* CONFIG_SECURITY */
3139
3140#endif /* ! __LINUX_SECURITY_H */
3141
3142