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