1 /*
2 * Linux Security Module interfaces
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 * Copyright (C) 2015 Intel Corporation.
10 * Copyright (C) 2015 Casey Schaufler <casey@schaufler-ca.com>
11 * Copyright (C) 2016 Mellanox Techonologies
12 *
13 * This program is free software; you can redistribute it and/or modify
14 * it under the terms of the GNU General Public License as published by
15 * the Free Software Foundation; either version 2 of the License, or
16 * (at your option) any later version.
17 *
18 * Due to this file being licensed under the GPL there is controversy over
19 * whether this permits you to write a module that #includes this file
20 * without placing your module under the GPL. Please consult a lawyer for
21 * advice before doing this.
22 *
23 */
24
25 #ifndef __LINUX_LSM_HOOKS_H
26 #define __LINUX_LSM_HOOKS_H
27
28 #include <linux/security.h>
29 #include <linux/init.h>
30 #include <linux/rculist.h>
31
32 /**
33 * union security_list_options - Linux Security Module hook function list
34 *
35 * Security hooks for program execution operations.
36 *
37 * @bprm_set_creds:
38 * Save security information in the bprm->security field, typically based
39 * on information about the bprm->file, for later use by the apply_creds
40 * hook. This hook may also optionally check permissions (e.g. for
41 * transitions between security domains).
42 * This hook may be called multiple times during a single execve, e.g. for
43 * interpreters. The hook can tell whether it has already been called by
44 * checking to see if @bprm->security is non-NULL. If so, then the hook
45 * may decide either to retain the security information saved earlier or
46 * to replace it. The hook must set @bprm->secureexec to 1 if a "secure
47 * exec" has happened as a result of this hook call. The flag is used to
48 * indicate the need for a sanitized execution environment, and is also
49 * passed in the ELF auxiliary table on the initial stack to indicate
50 * whether libc should enable secure mode.
51 * @bprm contains the linux_binprm structure.
52 * Return 0 if the hook is successful and permission is granted.
53 * @bprm_check_security:
54 * This hook mediates the point when a search for a binary handler will
55 * begin. It allows a check the @bprm->security value which is set in the
56 * preceding set_creds call. The primary difference from set_creds is
57 * that the argv list and envp list are reliably available in @bprm. This
58 * hook may be called multiple times during a single execve; and in each
59 * pass set_creds is called first.
60 * @bprm contains the linux_binprm structure.
61 * Return 0 if the hook is successful and permission is granted.
62 * @bprm_committing_creds:
63 * Prepare to install the new security attributes of a process being
64 * transformed by an execve operation, based on the old credentials
65 * pointed to by @current->cred and the information set in @bprm->cred by
66 * the bprm_set_creds hook. @bprm points to the linux_binprm structure.
67 * This hook is a good place to perform state changes on the process such
68 * as closing open file descriptors to which access will no longer be
69 * granted when the attributes are changed. This is called immediately
70 * before commit_creds().
71 * @bprm_committed_creds:
72 * Tidy up after the installation of the new security attributes of a
73 * process being transformed by an execve operation. The new credentials
74 * have, by this point, been set to @current->cred. @bprm points to the
75 * linux_binprm structure. This hook is a good place to perform state
76 * changes on the process such as clearing out non-inheritable signal
77 * state. This is called immediately after commit_creds().
78 *
79 * Security hooks for mount using fs_context.
80 * [See also Documentation/filesystems/mount_api.txt]
81 *
82 * @fs_context_dup:
83 * Allocate and attach a security structure to sc->security. This pointer
84 * is initialised to NULL by the caller.
85 * @fc indicates the new filesystem context.
86 * @src_fc indicates the original filesystem context.
87 * @fs_context_parse_param:
88 * Userspace provided a parameter to configure a superblock. The LSM may
89 * reject it with an error and may use it for itself, in which case it
90 * should return 0; otherwise it should return -ENOPARAM to pass it on to
91 * the filesystem.
92 * @fc indicates the filesystem context.
93 * @param The parameter
94 *
95 * Security hooks for filesystem operations.
96 *
97 * @sb_alloc_security:
98 * Allocate and attach a security structure to the sb->s_security field.
99 * The s_security field is initialized to NULL when the structure is
100 * allocated.
101 * @sb contains the super_block structure to be modified.
102 * Return 0 if operation was successful.
103 * @sb_free_security:
104 * Deallocate and clear the sb->s_security field.
105 * @sb contains the super_block structure to be modified.
106 * @sb_statfs:
107 * Check permission before obtaining filesystem statistics for the @mnt
108 * mountpoint.
109 * @dentry is a handle on the superblock for the filesystem.
110 * Return 0 if permission is granted.
111 * @sb_mount:
112 * Check permission before an object specified by @dev_name is mounted on
113 * the mount point named by @nd. For an ordinary mount, @dev_name
114 * identifies a device if the file system type requires a device. For a
115 * remount (@flags & MS_REMOUNT), @dev_name is irrelevant. For a
116 * loopback/bind mount (@flags & MS_BIND), @dev_name identifies the
117 * pathname of the object being mounted.
118 * @dev_name contains the name for object being mounted.
119 * @path contains the path for mount point object.
120 * @type contains the filesystem type.
121 * @flags contains the mount flags.
122 * @data contains the filesystem-specific data.
123 * Return 0 if permission is granted.
124 * @sb_copy_data:
125 * Allow mount option data to be copied prior to parsing by the filesystem,
126 * so that the security module can extract security-specific mount
127 * options cleanly (a filesystem may modify the data e.g. with strsep()).
128 * This also allows the original mount data to be stripped of security-
129 * specific options to avoid having to make filesystems aware of them.
130 * @orig the original mount data copied from userspace.
131 * @copy copied data which will be passed to the security module.
132 * Returns 0 if the copy was successful.
133 * @sb_remount:
134 * Extracts security system specific mount options and verifies no changes
135 * are being made to those options.
136 * @sb superblock being remounted
137 * @data contains the filesystem-specific data.
138 * Return 0 if permission is granted.
139 * @sb_umount:
140 * Check permission before the @mnt file system is unmounted.
141 * @mnt contains the mounted file system.
142 * @flags contains the unmount flags, e.g. MNT_FORCE.
143 * Return 0 if permission is granted.
144 * @sb_pivotroot:
145 * Check permission before pivoting the root filesystem.
146 * @old_path contains the path for the new location of the
147 * current root (put_old).
148 * @new_path contains the path for the new root (new_root).
149 * Return 0 if permission is granted.
150 * @sb_set_mnt_opts:
151 * Set the security relevant mount options used for a superblock
152 * @sb the superblock to set security mount options for
153 * @opts binary data structure containing all lsm mount data
154 * @sb_clone_mnt_opts:
155 * Copy all security options from a given superblock to another
156 * @oldsb old superblock which contain information to clone
157 * @newsb new superblock which needs filled in
158 * @sb_parse_opts_str:
159 * Parse a string of security data filling in the opts structure
160 * @options string containing all mount options known by the LSM
161 * @opts binary data structure usable by the LSM
162 * @move_mount:
163 * Check permission before a mount is moved.
164 * @from_path indicates the mount that is going to be moved.
165 * @to_path indicates the mountpoint that will be mounted upon.
166 * @dentry_init_security:
167 * Compute a context for a dentry as the inode is not yet available
168 * since NFSv4 has no label backed by an EA anyway.
169 * @dentry dentry to use in calculating the context.
170 * @mode mode used to determine resource type.
171 * @name name of the last path component used to create file
172 * @ctx pointer to place the pointer to the resulting context in.
173 * @ctxlen point to place the length of the resulting context.
174 * @dentry_create_files_as:
175 * Compute a context for a dentry as the inode is not yet available
176 * and set that context in passed in creds so that new files are
177 * created using that context. Context is calculated using the
178 * passed in creds and not the creds of the caller.
179 * @dentry dentry to use in calculating the context.
180 * @mode mode used to determine resource type.
181 * @name name of the last path component used to create file
182 * @old creds which should be used for context calculation
183 * @new creds to modify
184 *
185 *
186 * Security hooks for inode operations.
187 *
188 * @inode_alloc_security:
189 * Allocate and attach a security structure to @inode->i_security. The
190 * i_security field is initialized to NULL when the inode structure is
191 * allocated.
192 * @inode contains the inode structure.
193 * Return 0 if operation was successful.
194 * @inode_free_security:
195 * @inode contains the inode structure.
196 * Deallocate the inode security structure and set @inode->i_security to
197 * NULL.
198 * @inode_init_security:
199 * Obtain the security attribute name suffix and value to set on a newly
200 * created inode and set up the incore security field for the new inode.
201 * This hook is called by the fs code as part of the inode creation
202 * transaction and provides for atomic labeling of the inode, unlike
203 * the post_create/mkdir/... hooks called by the VFS. The hook function
204 * is expected to allocate the name and value via kmalloc, with the caller
205 * being responsible for calling kfree after using them.
206 * If the security module does not use security attributes or does
207 * not wish to put a security attribute on this particular inode,
208 * then it should return -EOPNOTSUPP to skip this processing.
209 * @inode contains the inode structure of the newly created inode.
210 * @dir contains the inode structure of the parent directory.
211 * @qstr contains the last path component of the new object
212 * @name will be set to the allocated name suffix (e.g. selinux).
213 * @value will be set to the allocated attribute value.
214 * @len will be set to the length of the value.
215 * Returns 0 if @name and @value have been successfully set,
216 * -EOPNOTSUPP if no security attribute is needed, or
217 * -ENOMEM on memory allocation failure.
218 * @inode_create:
219 * Check permission to create a regular file.
220 * @dir contains inode structure of the parent of the new file.
221 * @dentry contains the dentry structure for the file to be created.
222 * @mode contains the file mode of the file to be created.
223 * Return 0 if permission is granted.
224 * @inode_link:
225 * Check permission before creating a new hard link to a file.
226 * @old_dentry contains the dentry structure for an existing
227 * link to the file.
228 * @dir contains the inode structure of the parent directory
229 * of the new link.
230 * @new_dentry contains the dentry structure for the new link.
231 * Return 0 if permission is granted.
232 * @path_link:
233 * Check permission before creating a new hard link to a file.
234 * @old_dentry contains the dentry structure for an existing link
235 * to the file.
236 * @new_dir contains the path structure of the parent directory of
237 * the new link.
238 * @new_dentry contains the dentry structure for the new link.
239 * Return 0 if permission is granted.
240 * @inode_unlink:
241 * Check the permission to remove a hard link to a file.
242 * @dir contains the inode structure of parent directory of the file.
243 * @dentry contains the dentry structure for file to be unlinked.
244 * Return 0 if permission is granted.
245 * @path_unlink:
246 * Check the permission to remove a hard link to a file.
247 * @dir contains the path structure of parent directory of the file.
248 * @dentry contains the dentry structure for file to be unlinked.
249 * Return 0 if permission is granted.
250 * @inode_symlink:
251 * Check the permission to create a symbolic link to a file.
252 * @dir contains the inode structure of parent directory of
253 * the symbolic link.
254 * @dentry contains the dentry structure of the symbolic link.
255 * @old_name contains the pathname of file.
256 * Return 0 if permission is granted.
257 * @path_symlink:
258 * Check the permission to create a symbolic link to a file.
259 * @dir contains the path structure of parent directory of
260 * the symbolic link.
261 * @dentry contains the dentry structure of the symbolic link.
262 * @old_name contains the pathname of file.
263 * Return 0 if permission is granted.
264 * @inode_mkdir:
265 * Check permissions to create a new directory in the existing directory
266 * associated with inode structure @dir.
267 * @dir contains the inode structure of parent of the directory
268 * to be created.
269 * @dentry contains the dentry structure of new directory.
270 * @mode contains the mode of new directory.
271 * Return 0 if permission is granted.
272 * @path_mkdir:
273 * Check permissions to create a new directory in the existing directory
274 * associated with path structure @path.
275 * @dir contains the path structure of parent of the directory
276 * to be created.
277 * @dentry contains the dentry structure of new directory.
278 * @mode contains the mode of new directory.
279 * Return 0 if permission is granted.
280 * @inode_rmdir:
281 * Check the permission to remove a directory.
282 * @dir contains the inode structure of parent of the directory
283 * to be removed.
284 * @dentry contains the dentry structure of directory to be removed.
285 * Return 0 if permission is granted.
286 * @path_rmdir:
287 * Check the permission to remove a directory.
288 * @dir contains the path structure of parent of the directory to be
289 * removed.
290 * @dentry contains the dentry structure of directory to be removed.
291 * Return 0 if permission is granted.
292 * @inode_mknod:
293 * Check permissions when creating a special file (or a socket or a fifo
294 * file created via the mknod system call). Note that if mknod operation
295 * is being done for a regular file, then the create hook will be called
296 * and not this hook.
297 * @dir contains the inode structure of parent of the new file.
298 * @dentry contains the dentry structure of the new file.
299 * @mode contains the mode of the new file.
300 * @dev contains the device number.
301 * Return 0 if permission is granted.
302 * @path_mknod:
303 * Check permissions when creating a file. Note that this hook is called
304 * even if mknod operation is being done for a regular file.
305 * @dir contains the path structure of parent of the new file.
306 * @dentry contains the dentry structure of the new file.
307 * @mode contains the mode of the new file.
308 * @dev contains the undecoded device number. Use new_decode_dev() to get
309 * the decoded device number.
310 * Return 0 if permission is granted.
311 * @inode_rename:
312 * Check for permission to rename a file or directory.
313 * @old_dir contains the inode structure for parent of the old link.
314 * @old_dentry contains the dentry structure of the old link.
315 * @new_dir contains the inode structure for parent of the new link.
316 * @new_dentry contains the dentry structure of the new link.
317 * Return 0 if permission is granted.
318 * @path_rename:
319 * Check for permission to rename a file or directory.
320 * @old_dir contains the path structure for parent of the old link.
321 * @old_dentry contains the dentry structure of the old link.
322 * @new_dir contains the path structure for parent of the new link.
323 * @new_dentry contains the dentry structure of the new link.
324 * Return 0 if permission is granted.
325 * @path_chmod:
326 * Check for permission to change a mode of the file @path. The new
327 * mode is specified in @mode.
328 * @path contains the path structure of the file to change the mode.
329 * @mode contains the new DAC's permission, which is a bitmask of
330 * constants from <include/uapi/linux/stat.h>
331 * Return 0 if permission is granted.
332 * @path_chown:
333 * Check for permission to change owner/group of a file or directory.
334 * @path contains the path structure.
335 * @uid contains new owner's ID.
336 * @gid contains new group's ID.
337 * Return 0 if permission is granted.
338 * @path_chroot:
339 * Check for permission to change root directory.
340 * @path contains the path structure.
341 * Return 0 if permission is granted.
342 * @path_notify:
343 * Check permissions before setting a watch on events as defined by @mask,
344 * on an object at @path, whose type is defined by @obj_type.
345 * @inode_readlink:
346 * Check the permission to read the symbolic link.
347 * @dentry contains the dentry structure for the file link.
348 * Return 0 if permission is granted.
349 * @inode_follow_link:
350 * Check permission to follow a symbolic link when looking up a pathname.
351 * @dentry contains the dentry structure for the link.
352 * @inode contains the inode, which itself is not stable in RCU-walk
353 * @rcu indicates whether we are in RCU-walk mode.
354 * Return 0 if permission is granted.
355 * @inode_permission:
356 * Check permission before accessing an inode. This hook is called by the
357 * existing Linux permission function, so a security module can use it to
358 * provide additional checking for existing Linux permission checks.
359 * Notice that this hook is called when a file is opened (as well as many
360 * other operations), whereas the file_security_ops permission hook is
361 * called when the actual read/write operations are performed.
362 * @inode contains the inode structure to check.
363 * @mask contains the permission mask.
364 * Return 0 if permission is granted.
365 * @inode_setattr:
366 * Check permission before setting file attributes. Note that the kernel
367 * call to notify_change is performed from several locations, whenever
368 * file attributes change (such as when a file is truncated, chown/chmod
369 * operations, transferring disk quotas, etc).
370 * @dentry contains the dentry structure for the file.
371 * @attr is the iattr structure containing the new file attributes.
372 * Return 0 if permission is granted.
373 * @path_truncate:
374 * Check permission before truncating a file.
375 * @path contains the path structure for the file.
376 * Return 0 if permission is granted.
377 * @inode_getattr:
378 * Check permission before obtaining file attributes.
379 * @path contains the path structure for the file.
380 * Return 0 if permission is granted.
381 * @inode_setxattr:
382 * Check permission before setting the extended attributes
383 * @value identified by @name for @dentry.
384 * Return 0 if permission is granted.
385 * @inode_post_setxattr:
386 * Update inode security field after successful setxattr operation.
387 * @value identified by @name for @dentry.
388 * @inode_getxattr:
389 * Check permission before obtaining the extended attributes
390 * identified by @name for @dentry.
391 * Return 0 if permission is granted.
392 * @inode_listxattr:
393 * Check permission before obtaining the list of extended attribute
394 * names for @dentry.
395 * Return 0 if permission is granted.
396 * @inode_removexattr:
397 * Check permission before removing the extended attribute
398 * identified by @name for @dentry.
399 * Return 0 if permission is granted.
400 * @inode_getsecurity:
401 * Retrieve a copy of the extended attribute representation of the
402 * security label associated with @name for @inode via @buffer. Note that
403 * @name is the remainder of the attribute name after the security prefix
404 * has been removed. @alloc is used to specify of the call should return a
405 * value via the buffer or just the value length Return size of buffer on
406 * success.
407 * @inode_setsecurity:
408 * Set the security label associated with @name for @inode from the
409 * extended attribute value @value. @size indicates the size of the
410 * @value in bytes. @flags may be XATTR_CREATE, XATTR_REPLACE, or 0.
411 * Note that @name is the remainder of the attribute name after the
412 * security. prefix has been removed.
413 * Return 0 on success.
414 * @inode_listsecurity:
415 * Copy the extended attribute names for the security labels
416 * associated with @inode into @buffer. The maximum size of @buffer
417 * is specified by @buffer_size. @buffer may be NULL to request
418 * the size of the buffer required.
419 * Returns number of bytes used/required on success.
420 * @inode_need_killpriv:
421 * Called when an inode has been changed.
422 * @dentry is the dentry being changed.
423 * Return <0 on error to abort the inode change operation.
424 * Return 0 if inode_killpriv does not need to be called.
425 * Return >0 if inode_killpriv does need to be called.
426 * @inode_killpriv:
427 * The setuid bit is being removed. Remove similar security labels.
428 * Called with the dentry->d_inode->i_mutex held.
429 * @dentry is the dentry being changed.
430 * Return 0 on success. If error is returned, then the operation
431 * causing setuid bit removal is failed.
432 * @inode_getsecid:
433 * Get the secid associated with the node.
434 * @inode contains a pointer to the inode.
435 * @secid contains a pointer to the location where result will be saved.
436 * In case of failure, @secid will be set to zero.
437 * @inode_copy_up:
438 * A file is about to be copied up from lower layer to upper layer of
439 * overlay filesystem. Security module can prepare a set of new creds
440 * and modify as need be and return new creds. Caller will switch to
441 * new creds temporarily to create new file and release newly allocated
442 * creds.
443 * @src indicates the union dentry of file that is being copied up.
444 * @new pointer to pointer to return newly allocated creds.
445 * Returns 0 on success or a negative error code on error.
446 * @inode_copy_up_xattr:
447 * Filter the xattrs being copied up when a unioned file is copied
448 * up from a lower layer to the union/overlay layer.
449 * @name indicates the name of the xattr.
450 * Returns 0 to accept the xattr, 1 to discard the xattr, -EOPNOTSUPP if
451 * security module does not know about attribute or a negative error code
452 * to abort the copy up. Note that the caller is responsible for reading
453 * and writing the xattrs as this hook is merely a filter.
454 *
455 * Security hooks for kernfs node operations
456 *
457 * @kernfs_init_security:
458 * Initialize the security context of a newly created kernfs node based
459 * on its own and its parent's attributes.
460 *
461 * @kn_dir the parent kernfs node
462 * @kn the new child kernfs node
463 *
464 * Security hooks for file operations
465 *
466 * @file_permission:
467 * Check file permissions before accessing an open file. This hook is
468 * called by various operations that read or write files. A security
469 * module can use this hook to perform additional checking on these
470 * operations, e.g. to revalidate permissions on use to support privilege
471 * bracketing or policy changes. Notice that this hook is used when the
472 * actual read/write operations are performed, whereas the
473 * inode_security_ops hook is called when a file is opened (as well as
474 * many other operations).
475 * Caveat: Although this hook can be used to revalidate permissions for
476 * various system call operations that read or write files, it does not
477 * address the revalidation of permissions for memory-mapped files.
478 * Security modules must handle this separately if they need such
479 * revalidation.
480 * @file contains the file structure being accessed.
481 * @mask contains the requested permissions.
482 * Return 0 if permission is granted.
483 * @file_alloc_security:
484 * Allocate and attach a security structure to the file->f_security field.
485 * The security field is initialized to NULL when the structure is first
486 * created.
487 * @file contains the file structure to secure.
488 * Return 0 if the hook is successful and permission is granted.
489 * @file_free_security:
490 * Deallocate and free any security structures stored in file->f_security.
491 * @file contains the file structure being modified.
492 * @file_ioctl:
493 * @file contains the file structure.
494 * @cmd contains the operation to perform.
495 * @arg contains the operational arguments.
496 * Check permission for an ioctl operation on @file. Note that @arg
497 * sometimes represents a user space pointer; in other cases, it may be a
498 * simple integer value. When @arg represents a user space pointer, it
499 * should never be used by the security module.
500 * Return 0 if permission is granted.
501 * @mmap_addr :
502 * Check permissions for a mmap operation at @addr.
503 * @addr contains virtual address that will be used for the operation.
504 * Return 0 if permission is granted.
505 * @mmap_file :
506 * Check permissions for a mmap operation. The @file may be NULL, e.g.
507 * if mapping anonymous memory.
508 * @file contains the file structure for file to map (may be NULL).
509 * @reqprot contains the protection requested by the application.
510 * @prot contains the protection that will be applied by the kernel.
511 * @flags contains the operational flags.
512 * Return 0 if permission is granted.
513 * @file_mprotect:
514 * Check permissions before changing memory access permissions.
515 * @vma contains the memory region to modify.
516 * @reqprot contains the protection requested by the application.
517 * @prot contains the protection that will be applied by the kernel.
518 * Return 0 if permission is granted.
519 * @file_lock:
520 * Check permission before performing file locking operations.
521 * Note the hook mediates both flock and fcntl style locks.
522 * @file contains the file structure.
523 * @cmd contains the posix-translated lock operation to perform
524 * (e.g. F_RDLCK, F_WRLCK).
525 * Return 0 if permission is granted.
526 * @file_fcntl:
527 * Check permission before allowing the file operation specified by @cmd
528 * from being performed on the file @file. Note that @arg sometimes
529 * represents a user space pointer; in other cases, it may be a simple
530 * integer value. When @arg represents a user space pointer, it should
531 * never be used by the security module.
532 * @file contains the file structure.
533 * @cmd contains the operation to be performed.
534 * @arg contains the operational arguments.
535 * Return 0 if permission is granted.
536 * @file_set_fowner:
537 * Save owner security information (typically from current->security) in
538 * file->f_security for later use by the send_sigiotask hook.
539 * @file contains the file structure to update.
540 * Return 0 on success.
541 * @file_send_sigiotask:
542 * Check permission for the file owner @fown to send SIGIO or SIGURG to the
543 * process @tsk. Note that this hook is sometimes called from interrupt.
544 * Note that the fown_struct, @fown, is never outside the context of a
545 * struct file, so the file structure (and associated security information)
546 * can always be obtained: container_of(fown, struct file, f_owner)
547 * @tsk contains the structure of task receiving signal.
548 * @fown contains the file owner information.
549 * @sig is the signal that will be sent. When 0, kernel sends SIGIO.
550 * Return 0 if permission is granted.
551 * @file_receive:
552 * This hook allows security modules to control the ability of a process
553 * to receive an open file descriptor via socket IPC.
554 * @file contains the file structure being received.
555 * Return 0 if permission is granted.
556 * @file_open:
557 * Save open-time permission checking state for later use upon
558 * file_permission, and recheck access if anything has changed
559 * since inode_permission.
560 *
561 * Security hooks for task operations.
562 *
563 * @task_alloc:
564 * @task task being allocated.
565 * @clone_flags contains the flags indicating what should be shared.
566 * Handle allocation of task-related resources.
567 * Returns a zero on success, negative values on failure.
568 * @task_free:
569 * @task task about to be freed.
570 * Handle release of task-related resources. (Note that this can be called
571 * from interrupt context.)
572 * @cred_alloc_blank:
573 * @cred points to the credentials.
574 * @gfp indicates the atomicity of any memory allocations.
575 * Only allocate sufficient memory and attach to @cred such that
576 * cred_transfer() will not get ENOMEM.
577 * @cred_free:
578 * @cred points to the credentials.
579 * Deallocate and clear the cred->security field in a set of credentials.
580 * @cred_prepare:
581 * @new points to the new credentials.
582 * @old points to the original credentials.
583 * @gfp indicates the atomicity of any memory allocations.
584 * Prepare a new set of credentials by copying the data from the old set.
585 * @cred_transfer:
586 * @new points to the new credentials.
587 * @old points to the original credentials.
588 * Transfer data from original creds to new creds
589 * @cred_getsecid:
590 * Retrieve the security identifier of the cred structure @c
591 * @c contains the credentials, secid will be placed into @secid.
592 * In case of failure, @secid will be set to zero.
593 * @kernel_act_as:
594 * Set the credentials for a kernel service to act as (subjective context).
595 * @new points to the credentials to be modified.
596 * @secid specifies the security ID to be set
597 * The current task must be the one that nominated @secid.
598 * Return 0 if successful.
599 * @kernel_create_files_as:
600 * Set the file creation context in a set of credentials to be the same as
601 * the objective context of the specified inode.
602 * @new points to the credentials to be modified.
603 * @inode points to the inode to use as a reference.
604 * The current task must be the one that nominated @inode.
605 * Return 0 if successful.
606 * @kernel_module_request:
607 * Ability to trigger the kernel to automatically upcall to userspace for
608 * userspace to load a kernel module with the given name.
609 * @kmod_name name of the module requested by the kernel
610 * Return 0 if successful.
611 * @kernel_load_data:
612 * Load data provided by userspace.
613 * @id kernel load data identifier
614 * Return 0 if permission is granted.
615 * @kernel_read_file:
616 * Read a file specified by userspace.
617 * @file contains the file structure pointing to the file being read
618 * by the kernel.
619 * @id kernel read file identifier
620 * Return 0 if permission is granted.
621 * @kernel_post_read_file:
622 * Read a file specified by userspace.
623 * @file contains the file structure pointing to the file being read
624 * by the kernel.
625 * @buf pointer to buffer containing the file contents.
626 * @size length of the file contents.
627 * @id kernel read file identifier
628 * Return 0 if permission is granted.
629 * @task_fix_setuid:
630 * Update the module's state after setting one or more of the user
631 * identity attributes of the current process. The @flags parameter
632 * indicates which of the set*uid system calls invoked this hook. If
633 * @new is the set of credentials that will be installed. Modifications
634 * should be made to this rather than to @current->cred.
635 * @old is the set of credentials that are being replaces
636 * @flags contains one of the LSM_SETID_* values.
637 * Return 0 on success.
638 * @task_setpgid:
639 * Check permission before setting the process group identifier of the
640 * process @p to @pgid.
641 * @p contains the task_struct for process being modified.
642 * @pgid contains the new pgid.
643 * Return 0 if permission is granted.
644 * @task_getpgid:
645 * Check permission before getting the process group identifier of the
646 * process @p.
647 * @p contains the task_struct for the process.
648 * Return 0 if permission is granted.
649 * @task_getsid:
650 * Check permission before getting the session identifier of the process
651 * @p.
652 * @p contains the task_struct for the process.
653 * Return 0 if permission is granted.
654 * @task_getsecid:
655 * Retrieve the security identifier of the process @p.
656 * @p contains the task_struct for the process and place is into @secid.
657 * In case of failure, @secid will be set to zero.
658 *
659 * @task_setnice:
660 * Check permission before setting the nice value of @p to @nice.
661 * @p contains the task_struct of process.
662 * @nice contains the new nice value.
663 * Return 0 if permission is granted.
664 * @task_setioprio:
665 * Check permission before setting the ioprio value of @p to @ioprio.
666 * @p contains the task_struct of process.
667 * @ioprio contains the new ioprio value
668 * Return 0 if permission is granted.
669 * @task_getioprio:
670 * Check permission before getting the ioprio value of @p.
671 * @p contains the task_struct of process.
672 * Return 0 if permission is granted.
673 * @task_prlimit:
674 * Check permission before getting and/or setting the resource limits of
675 * another task.
676 * @cred points to the cred structure for the current task.
677 * @tcred points to the cred structure for the target task.
678 * @flags contains the LSM_PRLIMIT_* flag bits indicating whether the
679 * resource limits are being read, modified, or both.
680 * Return 0 if permission is granted.
681 * @task_setrlimit:
682 * Check permission before setting the resource limits of process @p
683 * for @resource to @new_rlim. The old resource limit values can
684 * be examined by dereferencing (p->signal->rlim + resource).
685 * @p points to the task_struct for the target task's group leader.
686 * @resource contains the resource whose limit is being set.
687 * @new_rlim contains the new limits for @resource.
688 * Return 0 if permission is granted.
689 * @task_setscheduler:
690 * Check permission before setting scheduling policy and/or parameters of
691 * process @p.
692 * @p contains the task_struct for process.
693 * Return 0 if permission is granted.
694 * @task_getscheduler:
695 * Check permission before obtaining scheduling information for process
696 * @p.
697 * @p contains the task_struct for process.
698 * Return 0 if permission is granted.
699 * @task_movememory:
700 * Check permission before moving memory owned by process @p.
701 * @p contains the task_struct for process.
702 * Return 0 if permission is granted.
703 * @task_kill:
704 * Check permission before sending signal @sig to @p. @info can be NULL,
705 * the constant 1, or a pointer to a kernel_siginfo structure. If @info is 1 or
706 * SI_FROMKERNEL(info) is true, then the signal should be viewed as coming
707 * from the kernel and should typically be permitted.
708 * SIGIO signals are handled separately by the send_sigiotask hook in
709 * file_security_ops.
710 * @p contains the task_struct for process.
711 * @info contains the signal information.
712 * @sig contains the signal value.
713 * @cred contains the cred of the process where the signal originated, or
714 * NULL if the current task is the originator.
715 * Return 0 if permission is granted.
716 * @task_prctl:
717 * Check permission before performing a process control operation on the
718 * current process.
719 * @option contains the operation.
720 * @arg2 contains a argument.
721 * @arg3 contains a argument.
722 * @arg4 contains a argument.
723 * @arg5 contains a argument.
724 * Return -ENOSYS if no-one wanted to handle this op, any other value to
725 * cause prctl() to return immediately with that value.
726 * @task_to_inode:
727 * Set the security attributes for an inode based on an associated task's
728 * security attributes, e.g. for /proc/pid inodes.
729 * @p contains the task_struct for the task.
730 * @inode contains the inode structure for the inode.
731 *
732 * Security hooks for Netlink messaging.
733 *
734 * @netlink_send:
735 * Save security information for a netlink message so that permission
736 * checking can be performed when the message is processed. The security
737 * information can be saved using the eff_cap field of the
738 * netlink_skb_parms structure. Also may be used to provide fine
739 * grained control over message transmission.
740 * @sk associated sock of task sending the message.
741 * @skb contains the sk_buff structure for the netlink message.
742 * Return 0 if the information was successfully saved and message
743 * is allowed to be transmitted.
744 *
745 * Security hooks for Unix domain networking.
746 *
747 * @unix_stream_connect:
748 * Check permissions before establishing a Unix domain stream connection
749 * between @sock and @other.
750 * @sock contains the sock structure.
751 * @other contains the peer sock structure.
752 * @newsk contains the new sock structure.
753 * Return 0 if permission is granted.
754 * @unix_may_send:
755 * Check permissions before connecting or sending datagrams from @sock to
756 * @other.
757 * @sock contains the socket structure.
758 * @other contains the peer socket structure.
759 * Return 0 if permission is granted.
760 *
761 * The @unix_stream_connect and @unix_may_send hooks were necessary because
762 * Linux provides an alternative to the conventional file name space for Unix
763 * domain sockets. Whereas binding and connecting to sockets in the file name
764 * space is mediated by the typical file permissions (and caught by the mknod
765 * and permission hooks in inode_security_ops), binding and connecting to
766 * sockets in the abstract name space is completely unmediated. Sufficient
767 * control of Unix domain sockets in the abstract name space isn't possible
768 * using only the socket layer hooks, since we need to know the actual target
769 * socket, which is not looked up until we are inside the af_unix code.
770 *
771 * Security hooks for socket operations.
772 *
773 * @socket_create:
774 * Check permissions prior to creating a new socket.
775 * @family contains the requested protocol family.
776 * @type contains the requested communications type.
777 * @protocol contains the requested protocol.
778 * @kern set to 1 if a kernel socket.
779 * Return 0 if permission is granted.
780 * @socket_post_create:
781 * This hook allows a module to update or allocate a per-socket security
782 * structure. Note that the security field was not added directly to the
783 * socket structure, but rather, the socket security information is stored
784 * in the associated inode. Typically, the inode alloc_security hook will
785 * allocate and and attach security information to
786 * SOCK_INODE(sock)->i_security. This hook may be used to update the
787 * SOCK_INODE(sock)->i_security field with additional information that
788 * wasn't available when the inode was allocated.
789 * @sock contains the newly created socket structure.
790 * @family contains the requested protocol family.
791 * @type contains the requested communications type.
792 * @protocol contains the requested protocol.
793 * @kern set to 1 if a kernel socket.
794 * @socket_socketpair:
795 * Check permissions before creating a fresh pair of sockets.
796 * @socka contains the first socket structure.
797 * @sockb contains the second socket structure.
798 * Return 0 if permission is granted and the connection was established.
799 * @socket_bind:
800 * Check permission before socket protocol layer bind operation is
801 * performed and the socket @sock is bound to the address specified in the
802 * @address parameter.
803 * @sock contains the socket structure.
804 * @address contains the address to bind to.
805 * @addrlen contains the length of address.
806 * Return 0 if permission is granted.
807 * @socket_connect:
808 * Check permission before socket protocol layer connect operation
809 * attempts to connect socket @sock to a remote address, @address.
810 * @sock contains the socket structure.
811 * @address contains the address of remote endpoint.
812 * @addrlen contains the length of address.
813 * Return 0 if permission is granted.
814 * @socket_listen:
815 * Check permission before socket protocol layer listen operation.
816 * @sock contains the socket structure.
817 * @backlog contains the maximum length for the pending connection queue.
818 * Return 0 if permission is granted.
819 * @socket_accept:
820 * Check permission before accepting a new connection. Note that the new
821 * socket, @newsock, has been created and some information copied to it,
822 * but the accept operation has not actually been performed.
823 * @sock contains the listening socket structure.
824 * @newsock contains the newly created server socket for connection.
825 * Return 0 if permission is granted.
826 * @socket_sendmsg:
827 * Check permission before transmitting a message to another socket.
828 * @sock contains the socket structure.
829 * @msg contains the message to be transmitted.
830 * @size contains the size of message.
831 * Return 0 if permission is granted.
832 * @socket_recvmsg:
833 * Check permission before receiving a message from a socket.
834 * @sock contains the socket structure.
835 * @msg contains the message structure.
836 * @size contains the size of message structure.
837 * @flags contains the operational flags.
838 * Return 0 if permission is granted.
839 * @socket_getsockname:
840 * Check permission before the local address (name) of the socket object
841 * @sock is retrieved.
842 * @sock contains the socket structure.
843 * Return 0 if permission is granted.
844 * @socket_getpeername:
845 * Check permission before the remote address (name) of a socket object
846 * @sock is retrieved.
847 * @sock contains the socket structure.
848 * Return 0 if permission is granted.
849 * @socket_getsockopt:
850 * Check permissions before retrieving the options associated with socket
851 * @sock.
852 * @sock contains the socket structure.
853 * @level contains the protocol level to retrieve option from.
854 * @optname contains the name of option to retrieve.
855 * Return 0 if permission is granted.
856 * @socket_setsockopt:
857 * Check permissions before setting the options associated with socket
858 * @sock.
859 * @sock contains the socket structure.
860 * @level contains the protocol level to set options for.
861 * @optname contains the name of the option to set.
862 * Return 0 if permission is granted.
863 * @socket_shutdown:
864 * Checks permission before all or part of a connection on the socket
865 * @sock is shut down.
866 * @sock contains the socket structure.
867 * @how contains the flag indicating how future sends and receives
868 * are handled.
869 * Return 0 if permission is granted.
870 * @socket_sock_rcv_skb:
871 * Check permissions on incoming network packets. This hook is distinct
872 * from Netfilter's IP input hooks since it is the first time that the
873 * incoming sk_buff @skb has been associated with a particular socket, @sk.
874 * Must not sleep inside this hook because some callers hold spinlocks.
875 * @sk contains the sock (not socket) associated with the incoming sk_buff.
876 * @skb contains the incoming network data.
877 * @socket_getpeersec_stream:
878 * This hook allows the security module to provide peer socket security
879 * state for unix or connected tcp sockets to userspace via getsockopt
880 * SO_GETPEERSEC. For tcp sockets this can be meaningful if the
881 * socket is associated with an ipsec SA.
882 * @sock is the local socket.
883 * @optval userspace memory where the security state is to be copied.
884 * @optlen userspace int where the module should copy the actual length
885 * of the security state.
886 * @len as input is the maximum length to copy to userspace provided
887 * by the caller.
888 * Return 0 if all is well, otherwise, typical getsockopt return
889 * values.
890 * @socket_getpeersec_dgram:
891 * This hook allows the security module to provide peer socket security
892 * state for udp sockets on a per-packet basis to userspace via
893 * getsockopt SO_GETPEERSEC. The application must first have indicated
894 * the IP_PASSSEC option via getsockopt. It can then retrieve the
895 * security state returned by this hook for a packet via the SCM_SECURITY
896 * ancillary message type.
897 * @sock contains the peer socket. May be NULL.
898 * @skb is the sk_buff for the packet being queried. May be NULL.
899 * @secid pointer to store the secid of the packet.
900 * Return 0 on success, error on failure.
901 * @sk_alloc_security:
902 * Allocate and attach a security structure to the sk->sk_security field,
903 * which is used to copy security attributes between local stream sockets.
904 * @sk_free_security:
905 * Deallocate security structure.
906 * @sk_clone_security:
907 * Clone/copy security structure.
908 * @sk_getsecid:
909 * Retrieve the LSM-specific secid for the sock to enable caching
910 * of network authorizations.
911 * @sock_graft:
912 * Sets the socket's isec sid to the sock's sid.
913 * @inet_conn_request:
914 * Sets the openreq's sid to socket's sid with MLS portion taken
915 * from peer sid.
916 * @inet_csk_clone:
917 * Sets the new child socket's sid to the openreq sid.
918 * @inet_conn_established:
919 * Sets the connection's peersid to the secmark on skb.
920 * @secmark_relabel_packet:
921 * check if the process should be allowed to relabel packets to
922 * the given secid
923 * @secmark_refcount_inc:
924 * tells the LSM to increment the number of secmark labeling rules loaded
925 * @secmark_refcount_dec:
926 * tells the LSM to decrement the number of secmark labeling rules loaded
927 * @req_classify_flow:
928 * Sets the flow's sid to the openreq sid.
929 * @tun_dev_alloc_security:
930 * This hook allows a module to allocate a security structure for a TUN
931 * device.
932 * @security pointer to a security structure pointer.
933 * Returns a zero on success, negative values on failure.
934 * @tun_dev_free_security:
935 * This hook allows a module to free the security structure for a TUN
936 * device.
937 * @security pointer to the TUN device's security structure
938 * @tun_dev_create:
939 * Check permissions prior to creating a new TUN device.
940 * @tun_dev_attach_queue:
941 * Check permissions prior to attaching to a TUN device queue.
942 * @security pointer to the TUN device's security structure.
943 * @tun_dev_attach:
944 * This hook can be used by the module to update any security state
945 * associated with the TUN device's sock structure.
946 * @sk contains the existing sock structure.
947 * @security pointer to the TUN device's security structure.
948 * @tun_dev_open:
949 * This hook can be used by the module to update any security state
950 * associated with the TUN device's security structure.
951 * @security pointer to the TUN devices's security structure.
952 *
953 * Security hooks for SCTP
954 *
955 * @sctp_assoc_request:
956 * Passes the @ep and @chunk->skb of the association INIT packet to
957 * the security module.
958 * @ep pointer to sctp endpoint structure.
959 * @skb pointer to skbuff of association packet.
960 * Return 0 on success, error on failure.
961 * @sctp_bind_connect:
962 * Validiate permissions required for each address associated with sock
963 * @sk. Depending on @optname, the addresses will be treated as either
964 * for a connect or bind service. The @addrlen is calculated on each
965 * ipv4 and ipv6 address using sizeof(struct sockaddr_in) or
966 * sizeof(struct sockaddr_in6).
967 * @sk pointer to sock structure.
968 * @optname name of the option to validate.
969 * @address list containing one or more ipv4/ipv6 addresses.
970 * @addrlen total length of address(s).
971 * Return 0 on success, error on failure.
972 * @sctp_sk_clone:
973 * Called whenever a new socket is created by accept(2) (i.e. a TCP
974 * style socket) or when a socket is 'peeled off' e.g userspace
975 * calls sctp_peeloff(3).
976 * @ep pointer to current sctp endpoint structure.
977 * @sk pointer to current sock structure.
978 * @sk pointer to new sock structure.
979 *
980 * Security hooks for Infiniband
981 *
982 * @ib_pkey_access:
983 * Check permission to access a pkey when modifing a QP.
984 * @subnet_prefix the subnet prefix of the port being used.
985 * @pkey the pkey to be accessed.
986 * @sec pointer to a security structure.
987 * @ib_endport_manage_subnet:
988 * Check permissions to send and receive SMPs on a end port.
989 * @dev_name the IB device name (i.e. mlx4_0).
990 * @port_num the port number.
991 * @sec pointer to a security structure.
992 * @ib_alloc_security:
993 * Allocate a security structure for Infiniband objects.
994 * @sec pointer to a security structure pointer.
995 * Returns 0 on success, non-zero on failure
996 * @ib_free_security:
997 * Deallocate an Infiniband security structure.
998 * @sec contains the security structure to be freed.
999 *
1000 * Security hooks for XFRM operations.
1001 *
1002 * @xfrm_policy_alloc_security:
1003 * @ctxp is a pointer to the xfrm_sec_ctx being added to Security Policy
1004 * Database used by the XFRM system.
1005 * @sec_ctx contains the security context information being provided by
1006 * the user-level policy update program (e.g., setkey).
1007 * Allocate a security structure to the xp->security field; the security
1008 * field is initialized to NULL when the xfrm_policy is allocated.
1009 * Return 0 if operation was successful (memory to allocate, legal context)
1010 * @gfp is to specify the context for the allocation
1011 * @xfrm_policy_clone_security:
1012 * @old_ctx contains an existing xfrm_sec_ctx.
1013 * @new_ctxp contains a new xfrm_sec_ctx being cloned from old.
1014 * Allocate a security structure in new_ctxp that contains the
1015 * information from the old_ctx structure.
1016 * Return 0 if operation was successful (memory to allocate).
1017 * @xfrm_policy_free_security:
1018 * @ctx contains the xfrm_sec_ctx
1019 * Deallocate xp->security.
1020 * @xfrm_policy_delete_security:
1021 * @ctx contains the xfrm_sec_ctx.
1022 * Authorize deletion of xp->security.
1023 * @xfrm_state_alloc:
1024 * @x contains the xfrm_state being added to the Security Association
1025 * Database by the XFRM system.
1026 * @sec_ctx contains the security context information being provided by
1027 * the user-level SA generation program (e.g., setkey or racoon).
1028 * Allocate a security structure to the x->security field; the security
1029 * field is initialized to NULL when the xfrm_state is allocated. Set the
1030 * context to correspond to sec_ctx. Return 0 if operation was successful
1031 * (memory to allocate, legal context).
1032 * @xfrm_state_alloc_acquire:
1033 * @x contains the xfrm_state being added to the Security Association
1034 * Database by the XFRM system.
1035 * @polsec contains the policy's security context.
1036 * @secid contains the secid from which to take the mls portion of the
1037 * context.
1038 * Allocate a security structure to the x->security field; the security
1039 * field is initialized to NULL when the xfrm_state is allocated. Set the
1040 * context to correspond to secid. Return 0 if operation was successful
1041 * (memory to allocate, legal context).
1042 * @xfrm_state_free_security:
1043 * @x contains the xfrm_state.
1044 * Deallocate x->security.
1045 * @xfrm_state_delete_security:
1046 * @x contains the xfrm_state.
1047 * Authorize deletion of x->security.
1048 * @xfrm_policy_lookup:
1049 * @ctx contains the xfrm_sec_ctx for which the access control is being
1050 * checked.
1051 * @fl_secid contains the flow security label that is used to authorize
1052 * access to the policy xp.
1053 * @dir contains the direction of the flow (input or output).
1054 * Check permission when a flow selects a xfrm_policy for processing
1055 * XFRMs on a packet. The hook is called when selecting either a
1056 * per-socket policy or a generic xfrm policy.
1057 * Return 0 if permission is granted, -ESRCH otherwise, or -errno
1058 * on other errors.
1059 * @xfrm_state_pol_flow_match:
1060 * @x contains the state to match.
1061 * @xp contains the policy to check for a match.
1062 * @fl contains the flow to check for a match.
1063 * Return 1 if there is a match.
1064 * @xfrm_decode_session:
1065 * @skb points to skb to decode.
1066 * @secid points to the flow key secid to set.
1067 * @ckall says if all xfrms used should be checked for same secid.
1068 * Return 0 if ckall is zero or all xfrms used have the same secid.
1069 *
1070 * Security hooks affecting all Key Management operations
1071 *
1072 * @key_alloc:
1073 * Permit allocation of a key and assign security data. Note that key does
1074 * not have a serial number assigned at this point.
1075 * @key points to the key.
1076 * @flags is the allocation flags
1077 * Return 0 if permission is granted, -ve error otherwise.
1078 * @key_free:
1079 * Notification of destruction; free security data.
1080 * @key points to the key.
1081 * No return value.
1082 * @key_permission:
1083 * See whether a specific operational right is granted to a process on a
1084 * key.
1085 * @key_ref refers to the key (key pointer + possession attribute bit).
1086 * @cred points to the credentials to provide the context against which to
1087 * evaluate the security data on the key.
1088 * @perm describes the combination of permissions required of this key.
1089 * Return 0 if permission is granted, -ve error otherwise.
1090 * @key_getsecurity:
1091 * Get a textual representation of the security context attached to a key
1092 * for the purposes of honouring KEYCTL_GETSECURITY. This function
1093 * allocates the storage for the NUL-terminated string and the caller
1094 * should free it.
1095 * @key points to the key to be queried.
1096 * @_buffer points to a pointer that should be set to point to the
1097 * resulting string (if no label or an error occurs).
1098 * Return the length of the string (including terminating NUL) or -ve if
1099 * an error.
1100 * May also return 0 (and a NULL buffer pointer) if there is no label.
1101 *
1102 * Security hooks affecting all System V IPC operations.
1103 *
1104 * @ipc_permission:
1105 * Check permissions for access to IPC
1106 * @ipcp contains the kernel IPC permission structure
1107 * @flag contains the desired (requested) permission set
1108 * Return 0 if permission is granted.
1109 * @ipc_getsecid:
1110 * Get the secid associated with the ipc object.
1111 * @ipcp contains the kernel IPC permission structure.
1112 * @secid contains a pointer to the location where result will be saved.
1113 * In case of failure, @secid will be set to zero.
1114 *
1115 * Security hooks for individual messages held in System V IPC message queues
1116 * @msg_msg_alloc_security:
1117 * Allocate and attach a security structure to the msg->security field.
1118 * The security field is initialized to NULL when the structure is first
1119 * created.
1120 * @msg contains the message structure to be modified.
1121 * Return 0 if operation was successful and permission is granted.
1122 * @msg_msg_free_security:
1123 * Deallocate the security structure for this message.
1124 * @msg contains the message structure to be modified.
1125 *
1126 * Security hooks for System V IPC Message Queues
1127 *
1128 * @msg_queue_alloc_security:
1129 * Allocate and attach a security structure to the
1130 * @perm->security field. The security field is initialized to
1131 * NULL when the structure is first created.
1132 * @perm contains the IPC permissions of the message queue.
1133 * Return 0 if operation was successful and permission is granted.
1134 * @msg_queue_free_security:
1135 * Deallocate security field @perm->security for the message queue.
1136 * @perm contains the IPC permissions of the message queue.
1137 * @msg_queue_associate:
1138 * Check permission when a message queue is requested through the
1139 * msgget system call. This hook is only called when returning the
1140 * message queue identifier for an existing message queue, not when a
1141 * new message queue is created.
1142 * @perm contains the IPC permissions of the message queue.
1143 * @msqflg contains the operation control flags.
1144 * Return 0 if permission is granted.
1145 * @msg_queue_msgctl:
1146 * Check permission when a message control operation specified by @cmd
1147 * is to be performed on the message queue with permissions @perm.
1148 * The @perm may be NULL, e.g. for IPC_INFO or MSG_INFO.
1149 * @perm contains the IPC permissions of the msg queue. May be NULL.
1150 * @cmd contains the operation to be performed.
1151 * Return 0 if permission is granted.
1152 * @msg_queue_msgsnd:
1153 * Check permission before a message, @msg, is enqueued on the message
1154 * queue with permissions @perm.
1155 * @perm contains the IPC permissions of the message queue.
1156 * @msg contains the message to be enqueued.
1157 * @msqflg contains operational flags.
1158 * Return 0 if permission is granted.
1159 * @msg_queue_msgrcv:
1160 * Check permission before a message, @msg, is removed from the message
1161 * queue. The @target task structure contains a pointer to the
1162 * process that will be receiving the message (not equal to the current
1163 * process when inline receives are being performed).
1164 * @perm contains the IPC permissions of the message queue.
1165 * @msg contains the message destination.
1166 * @target contains the task structure for recipient process.
1167 * @type contains the type of message requested.
1168 * @mode contains the operational flags.
1169 * Return 0 if permission is granted.
1170 *
1171 * Security hooks for System V Shared Memory Segments
1172 *
1173 * @shm_alloc_security:
1174 * Allocate and attach a security structure to the @perm->security
1175 * field. The security field is initialized to NULL when the structure is
1176 * first created.
1177 * @perm contains the IPC permissions of the shared memory structure.
1178 * Return 0 if operation was successful and permission is granted.
1179 * @shm_free_security:
1180 * Deallocate the security structure @perm->security for the memory segment.
1181 * @perm contains the IPC permissions of the shared memory structure.
1182 * @shm_associate:
1183 * Check permission when a shared memory region is requested through the
1184 * shmget system call. This hook is only called when returning the shared
1185 * memory region identifier for an existing region, not when a new shared
1186 * memory region is created.
1187 * @perm contains the IPC permissions of the shared memory structure.
1188 * @shmflg contains the operation control flags.
1189 * Return 0 if permission is granted.
1190 * @shm_shmctl:
1191 * Check permission when a shared memory control operation specified by
1192 * @cmd is to be performed on the shared memory region with permissions @perm.
1193 * The @perm may be NULL, e.g. for IPC_INFO or SHM_INFO.
1194 * @perm contains the IPC permissions of the shared memory structure.
1195 * @cmd contains the operation to be performed.
1196 * Return 0 if permission is granted.
1197 * @shm_shmat:
1198 * Check permissions prior to allowing the shmat system call to attach the
1199 * shared memory segment with permissions @perm to the data segment of the
1200 * calling process. The attaching address is specified by @shmaddr.
1201 * @perm contains the IPC permissions of the shared memory structure.
1202 * @shmaddr contains the address to attach memory region to.
1203 * @shmflg contains the operational flags.
1204 * Return 0 if permission is granted.
1205 *
1206 * Security hooks for System V Semaphores
1207 *
1208 * @sem_alloc_security:
1209 * Allocate and attach a security structure to the @perm->security
1210 * field. The security field is initialized to NULL when the structure is
1211 * first created.
1212 * @perm contains the IPC permissions of the semaphore.
1213 * Return 0 if operation was successful and permission is granted.
1214 * @sem_free_security:
1215 * Deallocate security structure @perm->security for the semaphore.
1216 * @perm contains the IPC permissions of the semaphore.
1217 * @sem_associate:
1218 * Check permission when a semaphore is requested through the semget
1219 * system call. This hook is only called when returning the semaphore
1220 * identifier for an existing semaphore, not when a new one must be
1221 * created.
1222 * @perm contains the IPC permissions of the semaphore.
1223 * @semflg contains the operation control flags.
1224 * Return 0 if permission is granted.
1225 * @sem_semctl:
1226 * Check permission when a semaphore operation specified by @cmd is to be
1227 * performed on the semaphore. The @perm may be NULL, e.g. for
1228 * IPC_INFO or SEM_INFO.
1229 * @perm contains the IPC permissions of the semaphore. May be NULL.
1230 * @cmd contains the operation to be performed.
1231 * Return 0 if permission is granted.
1232 * @sem_semop:
1233 * Check permissions before performing operations on members of the
1234 * semaphore set. If the @alter flag is nonzero, the semaphore set
1235 * may be modified.
1236 * @perm contains the IPC permissions of the semaphore.
1237 * @sops contains the operations to perform.
1238 * @nsops contains the number of operations to perform.
1239 * @alter contains the flag indicating whether changes are to be made.
1240 * Return 0 if permission is granted.
1241 *
1242 * @binder_set_context_mgr:
1243 * Check whether @mgr is allowed to be the binder context manager.
1244 * @mgr contains the task_struct for the task being registered.
1245 * Return 0 if permission is granted.
1246 * @binder_transaction:
1247 * Check whether @from is allowed to invoke a binder transaction call
1248 * to @to.
1249 * @from contains the task_struct for the sending task.
1250 * @to contains the task_struct for the receiving task.
1251 * @binder_transfer_binder:
1252 * Check whether @from is allowed to transfer a binder reference to @to.
1253 * @from contains the task_struct for the sending task.
1254 * @to contains the task_struct for the receiving task.
1255 * @binder_transfer_file:
1256 * Check whether @from is allowed to transfer @file to @to.
1257 * @from contains the task_struct for the sending task.
1258 * @file contains the struct file being transferred.
1259 * @to contains the task_struct for the receiving task.
1260 *
1261 * @ptrace_access_check:
1262 * Check permission before allowing the current process to trace the
1263 * @child process.
1264 * Security modules may also want to perform a process tracing check
1265 * during an execve in the set_security or apply_creds hooks of
1266 * tracing check during an execve in the bprm_set_creds hook of
1267 * binprm_security_ops if the process is being traced and its security
1268 * attributes would be changed by the execve.
1269 * @child contains the task_struct structure for the target process.
1270 * @mode contains the PTRACE_MODE flags indicating the form of access.
1271 * Return 0 if permission is granted.
1272 * @ptrace_traceme:
1273 * Check that the @parent process has sufficient permission to trace the
1274 * current process before allowing the current process to present itself
1275 * to the @parent process for tracing.
1276 * @parent contains the task_struct structure for debugger process.
1277 * Return 0 if permission is granted.
1278 * @capget:
1279 * Get the @effective, @inheritable, and @permitted capability sets for
1280 * the @target process. The hook may also perform permission checking to
1281 * determine if the current process is allowed to see the capability sets
1282 * of the @target process.
1283 * @target contains the task_struct structure for target process.
1284 * @effective contains the effective capability set.
1285 * @inheritable contains the inheritable capability set.
1286 * @permitted contains the permitted capability set.
1287 * Return 0 if the capability sets were successfully obtained.
1288 * @capset:
1289 * Set the @effective, @inheritable, and @permitted capability sets for
1290 * the current process.
1291 * @new contains the new credentials structure for target process.
1292 * @old contains the current credentials structure for target process.
1293 * @effective contains the effective capability set.
1294 * @inheritable contains the inheritable capability set.
1295 * @permitted contains the permitted capability set.
1296 * Return 0 and update @new if permission is granted.
1297 * @capable:
1298 * Check whether the @tsk process has the @cap capability in the indicated
1299 * credentials.
1300 * @cred contains the credentials to use.
1301 * @ns contains the user namespace we want the capability in
1302 * @cap contains the capability <include/linux/capability.h>.
1303 * @opts contains options for the capable check <include/linux/security.h>
1304 * Return 0 if the capability is granted for @tsk.
1305 * @syslog:
1306 * Check permission before accessing the kernel message ring or changing
1307 * logging to the console.
1308 * See the syslog(2) manual page for an explanation of the @type values.
1309 * @type contains the SYSLOG_ACTION_* constant from <include/linux/syslog.h>
1310 * Return 0 if permission is granted.
1311 * @settime:
1312 * Check permission to change the system time.
1313 * struct timespec64 is defined in <include/linux/time64.h> and timezone
1314 * is defined in <include/linux/time.h>
1315 * @ts contains new time
1316 * @tz contains new timezone
1317 * Return 0 if permission is granted.
1318 * @vm_enough_memory:
1319 * Check permissions for allocating a new virtual mapping.
1320 * @mm contains the mm struct it is being added to.
1321 * @pages contains the number of pages.
1322 * Return 0 if permission is granted.
1323 *
1324 * @ismaclabel:
1325 * Check if the extended attribute specified by @name
1326 * represents a MAC label. Returns 1 if name is a MAC
1327 * attribute otherwise returns 0.
1328 * @name full extended attribute name to check against
1329 * LSM as a MAC label.
1330 *
1331 * @secid_to_secctx:
1332 * Convert secid to security context. If secdata is NULL the length of
1333 * the result will be returned in seclen, but no secdata will be returned.
1334 * This does mean that the length could change between calls to check the
1335 * length and the next call which actually allocates and returns the
1336 * secdata.
1337 * @secid contains the security ID.
1338 * @secdata contains the pointer that stores the converted security
1339 * context.
1340 * @seclen pointer which contains the length of the data
1341 * @secctx_to_secid:
1342 * Convert security context to secid.
1343 * @secid contains the pointer to the generated security ID.
1344 * @secdata contains the security context.
1345 *
1346 * @release_secctx:
1347 * Release the security context.
1348 * @secdata contains the security context.
1349 * @seclen contains the length of the security context.
1350 *
1351 * Security hooks for Audit
1352 *
1353 * @audit_rule_init:
1354 * Allocate and initialize an LSM audit rule structure.
1355 * @field contains the required Audit action.
1356 * Fields flags are defined in <include/linux/audit.h>
1357 * @op contains the operator the rule uses.
1358 * @rulestr contains the context where the rule will be applied to.
1359 * @lsmrule contains a pointer to receive the result.
1360 * Return 0 if @lsmrule has been successfully set,
1361 * -EINVAL in case of an invalid rule.
1362 *
1363 * @audit_rule_known:
1364 * Specifies whether given @krule contains any fields related to
1365 * current LSM.
1366 * @krule contains the audit rule of interest.
1367 * Return 1 in case of relation found, 0 otherwise.
1368 *
1369 * @audit_rule_match:
1370 * Determine if given @secid matches a rule previously approved
1371 * by @audit_rule_known.
1372 * @secid contains the security id in question.
1373 * @field contains the field which relates to current LSM.
1374 * @op contains the operator that will be used for matching.
1375 * @lrule points to the audit rule that will be checked against.
1376 * Return 1 if secid matches the rule, 0 if it does not, -ERRNO on failure.
1377 *
1378 * @audit_rule_free:
1379 * Deallocate the LSM audit rule structure previously allocated by
1380 * audit_rule_init.
1381 * @lsmrule contains the allocated rule
1382 *
1383 * @inode_invalidate_secctx:
1384 * Notify the security module that it must revalidate the security context
1385 * of an inode.
1386 *
1387 * @inode_notifysecctx:
1388 * Notify the security module of what the security context of an inode
1389 * should be. Initializes the incore security context managed by the
1390 * security module for this inode. Example usage: NFS client invokes
1391 * this hook to initialize the security context in its incore inode to the
1392 * value provided by the server for the file when the server returned the
1393 * file's attributes to the client.
1394 * Must be called with inode->i_mutex locked.
1395 * @inode we wish to set the security context of.
1396 * @ctx contains the string which we wish to set in the inode.
1397 * @ctxlen contains the length of @ctx.
1398 *
1399 * @inode_setsecctx:
1400 * Change the security context of an inode. Updates the
1401 * incore security context managed by the security module and invokes the
1402 * fs code as needed (via __vfs_setxattr_noperm) to update any backing
1403 * xattrs that represent the context. Example usage: NFS server invokes
1404 * this hook to change the security context in its incore inode and on the
1405 * backing filesystem to a value provided by the client on a SETATTR
1406 * operation.
1407 * Must be called with inode->i_mutex locked.
1408 * @dentry contains the inode we wish to set the security context of.
1409 * @ctx contains the string which we wish to set in the inode.
1410 * @ctxlen contains the length of @ctx.
1411 *
1412 * @inode_getsecctx:
1413 * On success, returns 0 and fills out @ctx and @ctxlen with the security
1414 * context for the given @inode.
1415 * @inode we wish to get the security context of.
1416 * @ctx is a pointer in which to place the allocated security context.
1417 * @ctxlen points to the place to put the length of @ctx.
1418 *
1419 * Security hooks for using the eBPF maps and programs functionalities through
1420 * eBPF syscalls.
1421 *
1422 * @bpf:
1423 * Do a initial check for all bpf syscalls after the attribute is copied
1424 * into the kernel. The actual security module can implement their own
1425 * rules to check the specific cmd they need.
1426 *
1427 * @bpf_map:
1428 * Do a check when the kernel generate and return a file descriptor for
1429 * eBPF maps.
1430 *
1431 * @map: bpf map that we want to access
1432 * @mask: the access flags
1433 *
1434 * @bpf_prog:
1435 * Do a check when the kernel generate and return a file descriptor for
1436 * eBPF programs.
1437 *
1438 * @prog: bpf prog that userspace want to use.
1439 *
1440 * @bpf_map_alloc_security:
1441 * Initialize the security field inside bpf map.
1442 *
1443 * @bpf_map_free_security:
1444 * Clean up the security information stored inside bpf map.
1445 *
1446 * @bpf_prog_alloc_security:
1447 * Initialize the security field inside bpf program.
1448 *
1449 * @bpf_prog_free_security:
1450 * Clean up the security information stored inside bpf prog.
1451 *
1452 * @locked_down
1453 * Determine whether a kernel feature that potentially enables arbitrary
1454 * code execution in kernel space should be permitted.
1455 *
1456 * @what: kernel feature being accessed
1457 */
1458 union security_list_options {
1459 int (*binder_set_context_mgr)(struct task_struct *mgr);
1460 int (*binder_transaction)(struct task_struct *from,
1461 struct task_struct *to);
1462 int (*binder_transfer_binder)(struct task_struct *from,
1463 struct task_struct *to);
1464 int (*binder_transfer_file)(struct task_struct *from,
1465 struct task_struct *to,
1466 struct file *file);
1467
1468 int (*ptrace_access_check)(struct task_struct *child,
1469 unsigned int mode);
1470 int (*ptrace_traceme)(struct task_struct *parent);
1471 int (*capget)(struct task_struct *target, kernel_cap_t *effective,
1472 kernel_cap_t *inheritable, kernel_cap_t *permitted);
1473 int (*capset)(struct cred *new, const struct cred *old,
1474 const kernel_cap_t *effective,
1475 const kernel_cap_t *inheritable,
1476 const kernel_cap_t *permitted);
1477 int (*capable)(const struct cred *cred,
1478 struct user_namespace *ns,
1479 int cap,
1480 unsigned int opts);
1481 int (*quotactl)(int cmds, int type, int id, struct super_block *sb);
1482 int (*quota_on)(struct dentry *dentry);
1483 int (*syslog)(int type);
1484 int (*settime)(const struct timespec64 *ts, const struct timezone *tz);
1485 int (*vm_enough_memory)(struct mm_struct *mm, long pages);
1486
1487 int (*bprm_set_creds)(struct linux_binprm *bprm);
1488 int (*bprm_check_security)(struct linux_binprm *bprm);
1489 void (*bprm_committing_creds)(struct linux_binprm *bprm);
1490 void (*bprm_committed_creds)(struct linux_binprm *bprm);
1491
1492 int (*fs_context_dup)(struct fs_context *fc, struct fs_context *src_sc);
1493 int (*fs_context_parse_param)(struct fs_context *fc, struct fs_parameter *param);
1494
1495 int (*sb_alloc_security)(struct super_block *sb);
1496 void (*sb_free_security)(struct super_block *sb);
1497 void (*sb_free_mnt_opts)(void *mnt_opts);
1498 int (*sb_eat_lsm_opts)(char *orig, void **mnt_opts);
1499 int (*sb_remount)(struct super_block *sb, void *mnt_opts);
1500 int (*sb_kern_mount)(struct super_block *sb);
1501 int (*sb_show_options)(struct seq_file *m, struct super_block *sb);
1502 int (*sb_statfs)(struct dentry *dentry);
1503 int (*sb_mount)(const char *dev_name, const struct path *path,
1504 const char *type, unsigned long flags, void *data);
1505 int (*sb_umount)(struct vfsmount *mnt, int flags);
1506 int (*sb_pivotroot)(const struct path *old_path, const struct path *new_path);
1507 int (*sb_set_mnt_opts)(struct super_block *sb,
1508 void *mnt_opts,
1509 unsigned long kern_flags,
1510 unsigned long *set_kern_flags);
1511 int (*sb_clone_mnt_opts)(const struct super_block *oldsb,
1512 struct super_block *newsb,
1513 unsigned long kern_flags,
1514 unsigned long *set_kern_flags);
1515 int (*sb_add_mnt_opt)(const char *option, const char *val, int len,
1516 void **mnt_opts);
1517 int (*move_mount)(const struct path *from_path, const struct path *to_path);
1518 int (*dentry_init_security)(struct dentry *dentry, int mode,
1519 const struct qstr *name, void **ctx,
1520 u32 *ctxlen);
1521 int (*dentry_create_files_as)(struct dentry *dentry, int mode,
1522 struct qstr *name,
1523 const struct cred *old,
1524 struct cred *new);
1525
1526
1527 #ifdef CONFIG_SECURITY_PATH
1528 int (*path_unlink)(const struct path *dir, struct dentry *dentry);
1529 int (*path_mkdir)(const struct path *dir, struct dentry *dentry,
1530 umode_t mode);
1531 int (*path_rmdir)(const struct path *dir, struct dentry *dentry);
1532 int (*path_mknod)(const struct path *dir, struct dentry *dentry,
1533 umode_t mode, unsigned int dev);
1534 int (*path_truncate)(const struct path *path);
1535 int (*path_symlink)(const struct path *dir, struct dentry *dentry,
1536 const char *old_name);
1537 int (*path_link)(struct dentry *old_dentry, const struct path *new_dir,
1538 struct dentry *new_dentry);
1539 int (*path_rename)(const struct path *old_dir, struct dentry *old_dentry,
1540 const struct path *new_dir,
1541 struct dentry *new_dentry);
1542 int (*path_chmod)(const struct path *path, umode_t mode);
1543 int (*path_chown)(const struct path *path, kuid_t uid, kgid_t gid);
1544 int (*path_chroot)(const struct path *path);
1545 #endif
1546 /* Needed for inode based security check */
1547 int (*path_notify)(const struct path *path, u64 mask,
1548 unsigned int obj_type);
1549 int (*inode_alloc_security)(struct inode *inode);
1550 void (*inode_free_security)(struct inode *inode);
1551 int (*inode_init_security)(struct inode *inode, struct inode *dir,
1552 const struct qstr *qstr,
1553 const char **name, void **value,
1554 size_t *len);
1555 int (*inode_create)(struct inode *dir, struct dentry *dentry,
1556 umode_t mode);
1557 int (*inode_link)(struct dentry *old_dentry, struct inode *dir,
1558 struct dentry *new_dentry);
1559 int (*inode_unlink)(struct inode *dir, struct dentry *dentry);
1560 int (*inode_symlink)(struct inode *dir, struct dentry *dentry,
1561 const char *old_name);
1562 int (*inode_mkdir)(struct inode *dir, struct dentry *dentry,
1563 umode_t mode);
1564 int (*inode_rmdir)(struct inode *dir, struct dentry *dentry);
1565 int (*inode_mknod)(struct inode *dir, struct dentry *dentry,
1566 umode_t mode, dev_t dev);
1567 int (*inode_rename)(struct inode *old_dir, struct dentry *old_dentry,
1568 struct inode *new_dir,
1569 struct dentry *new_dentry);
1570 int (*inode_readlink)(struct dentry *dentry);
1571 int (*inode_follow_link)(struct dentry *dentry, struct inode *inode,
1572 bool rcu);
1573 int (*inode_permission)(struct inode *inode, int mask);
1574 int (*inode_setattr)(struct dentry *dentry, struct iattr *attr);
1575 int (*inode_getattr)(const struct path *path);
1576 int (*inode_setxattr)(struct dentry *dentry, const char *name,
1577 const void *value, size_t size, int flags);
1578 void (*inode_post_setxattr)(struct dentry *dentry, const char *name,
1579 const void *value, size_t size,
1580 int flags);
1581 int (*inode_getxattr)(struct dentry *dentry, const char *name);
1582 int (*inode_listxattr)(struct dentry *dentry);
1583 int (*inode_removexattr)(struct dentry *dentry, const char *name);
1584 int (*inode_need_killpriv)(struct dentry *dentry);
1585 int (*inode_killpriv)(struct dentry *dentry);
1586 int (*inode_getsecurity)(struct inode *inode, const char *name,
1587 void **buffer, bool alloc);
1588 int (*inode_setsecurity)(struct inode *inode, const char *name,
1589 const void *value, size_t size,
1590 int flags);
1591 int (*inode_listsecurity)(struct inode *inode, char *buffer,
1592 size_t buffer_size);
1593 void (*inode_getsecid)(struct inode *inode, u32 *secid);
1594 int (*inode_copy_up)(struct dentry *src, struct cred **new);
1595 int (*inode_copy_up_xattr)(const char *name);
1596
1597 int (*kernfs_init_security)(struct kernfs_node *kn_dir,
1598 struct kernfs_node *kn);
1599
1600 int (*file_permission)(struct file *file, int mask);
1601 int (*file_alloc_security)(struct file *file);
1602 void (*file_free_security)(struct file *file);
1603 int (*file_ioctl)(struct file *file, unsigned int cmd,
1604 unsigned long arg);
1605 int (*mmap_addr)(unsigned long addr);
1606 int (*mmap_file)(struct file *file, unsigned long reqprot,
1607 unsigned long prot, unsigned long flags);
1608 int (*file_mprotect)(struct vm_area_struct *vma, unsigned long reqprot,
1609 unsigned long prot);
1610 int (*file_lock)(struct file *file, unsigned int cmd);
1611 int (*file_fcntl)(struct file *file, unsigned int cmd,
1612 unsigned long arg);
1613 void (*file_set_fowner)(struct file *file);
1614 int (*file_send_sigiotask)(struct task_struct *tsk,
1615 struct fown_struct *fown, int sig);
1616 int (*file_receive)(struct file *file);
1617 int (*file_open)(struct file *file);
1618
1619 int (*task_alloc)(struct task_struct *task, unsigned long clone_flags);
1620 void (*task_free)(struct task_struct *task);
1621 int (*cred_alloc_blank)(struct cred *cred, gfp_t gfp);
1622 void (*cred_free)(struct cred *cred);
1623 int (*cred_prepare)(struct cred *new, const struct cred *old,
1624 gfp_t gfp);
1625 void (*cred_transfer)(struct cred *new, const struct cred *old);
1626 void (*cred_getsecid)(const struct cred *c, u32 *secid);
1627 int (*kernel_act_as)(struct cred *new, u32 secid);
1628 int (*kernel_create_files_as)(struct cred *new, struct inode *inode);
1629 int (*kernel_module_request)(char *kmod_name);
1630 int (*kernel_load_data)(enum kernel_load_data_id id);
1631 int (*kernel_read_file)(struct file *file, enum kernel_read_file_id id);
1632 int (*kernel_post_read_file)(struct file *file, char *buf, loff_t size,
1633 enum kernel_read_file_id id);
1634 int (*task_fix_setuid)(struct cred *new, const struct cred *old,
1635 int flags);
1636 int (*task_setpgid)(struct task_struct *p, pid_t pgid);
1637 int (*task_getpgid)(struct task_struct *p);
1638 int (*task_getsid)(struct task_struct *p);
1639 void (*task_getsecid)(struct task_struct *p, u32 *secid);
1640 int (*task_setnice)(struct task_struct *p, int nice);
1641 int (*task_setioprio)(struct task_struct *p, int ioprio);
1642 int (*task_getioprio)(struct task_struct *p);
1643 int (*task_prlimit)(const struct cred *cred, const struct cred *tcred,
1644 unsigned int flags);
1645 int (*task_setrlimit)(struct task_struct *p, unsigned int resource,
1646 struct rlimit *new_rlim);
1647 int (*task_setscheduler)(struct task_struct *p);
1648 int (*task_getscheduler)(struct task_struct *p);
1649 int (*task_movememory)(struct task_struct *p);
1650 int (*task_kill)(struct task_struct *p, struct kernel_siginfo *info,
1651 int sig, const struct cred *cred);
1652 int (*task_prctl)(int option, unsigned long arg2, unsigned long arg3,
1653 unsigned long arg4, unsigned long arg5);
1654 void (*task_to_inode)(struct task_struct *p, struct inode *inode);
1655
1656 int (*ipc_permission)(struct kern_ipc_perm *ipcp, short flag);
1657 void (*ipc_getsecid)(struct kern_ipc_perm *ipcp, u32 *secid);
1658
1659 int (*msg_msg_alloc_security)(struct msg_msg *msg);
1660 void (*msg_msg_free_security)(struct msg_msg *msg);
1661
1662 int (*msg_queue_alloc_security)(struct kern_ipc_perm *perm);
1663 void (*msg_queue_free_security)(struct kern_ipc_perm *perm);
1664 int (*msg_queue_associate)(struct kern_ipc_perm *perm, int msqflg);
1665 int (*msg_queue_msgctl)(struct kern_ipc_perm *perm, int cmd);
1666 int (*msg_queue_msgsnd)(struct kern_ipc_perm *perm, struct msg_msg *msg,
1667 int msqflg);
1668 int (*msg_queue_msgrcv)(struct kern_ipc_perm *perm, struct msg_msg *msg,
1669 struct task_struct *target, long type,
1670 int mode);
1671
1672 int (*shm_alloc_security)(struct kern_ipc_perm *perm);
1673 void (*shm_free_security)(struct kern_ipc_perm *perm);
1674 int (*shm_associate)(struct kern_ipc_perm *perm, int shmflg);
1675 int (*shm_shmctl)(struct kern_ipc_perm *perm, int cmd);
1676 int (*shm_shmat)(struct kern_ipc_perm *perm, char __user *shmaddr,
1677 int shmflg);
1678
1679 int (*sem_alloc_security)(struct kern_ipc_perm *perm);
1680 void (*sem_free_security)(struct kern_ipc_perm *perm);
1681 int (*sem_associate)(struct kern_ipc_perm *perm, int semflg);
1682 int (*sem_semctl)(struct kern_ipc_perm *perm, int cmd);
1683 int (*sem_semop)(struct kern_ipc_perm *perm, struct sembuf *sops,
1684 unsigned nsops, int alter);
1685
1686 int (*netlink_send)(struct sock *sk, struct sk_buff *skb);
1687
1688 void (*d_instantiate)(struct dentry *dentry, struct inode *inode);
1689
1690 int (*getprocattr)(struct task_struct *p, char *name, char **value);
1691 int (*setprocattr)(const char *name, void *value, size_t size);
1692 int (*ismaclabel)(const char *name);
1693 int (*secid_to_secctx)(u32 secid, char **secdata, u32 *seclen);
1694 int (*secctx_to_secid)(const char *secdata, u32 seclen, u32 *secid);
1695 void (*release_secctx)(char *secdata, u32 seclen);
1696
1697 void (*inode_invalidate_secctx)(struct inode *inode);
1698 int (*inode_notifysecctx)(struct inode *inode, void *ctx, u32 ctxlen);
1699 int (*inode_setsecctx)(struct dentry *dentry, void *ctx, u32 ctxlen);
1700 int (*inode_getsecctx)(struct inode *inode, void **ctx, u32 *ctxlen);
1701
1702 #ifdef CONFIG_SECURITY_NETWORK
1703 int (*unix_stream_connect)(struct sock *sock, struct sock *other,
1704 struct sock *newsk);
1705 int (*unix_may_send)(struct socket *sock, struct socket *other);
1706
1707 int (*socket_create)(int family, int type, int protocol, int kern);
1708 int (*socket_post_create)(struct socket *sock, int family, int type,
1709 int protocol, int kern);
1710 int (*socket_socketpair)(struct socket *socka, struct socket *sockb);
1711 int (*socket_bind)(struct socket *sock, struct sockaddr *address,
1712 int addrlen);
1713 int (*socket_connect)(struct socket *sock, struct sockaddr *address,
1714 int addrlen);
1715 int (*socket_listen)(struct socket *sock, int backlog);
1716 int (*socket_accept)(struct socket *sock, struct socket *newsock);
1717 int (*socket_sendmsg)(struct socket *sock, struct msghdr *msg,
1718 int size);
1719 int (*socket_recvmsg)(struct socket *sock, struct msghdr *msg,
1720 int size, int flags);
1721 int (*socket_getsockname)(struct socket *sock);
1722 int (*socket_getpeername)(struct socket *sock);
1723 int (*socket_getsockopt)(struct socket *sock, int level, int optname);
1724 int (*socket_setsockopt)(struct socket *sock, int level, int optname);
1725 int (*socket_shutdown)(struct socket *sock, int how);
1726 int (*socket_sock_rcv_skb)(struct sock *sk, struct sk_buff *skb);
1727 int (*socket_getpeersec_stream)(struct socket *sock,
1728 char __user *optval,
1729 int __user *optlen, unsigned len);
1730 int (*socket_getpeersec_dgram)(struct socket *sock,
1731 struct sk_buff *skb, u32 *secid);
1732 int (*sk_alloc_security)(struct sock *sk, int family, gfp_t priority);
1733 void (*sk_free_security)(struct sock *sk);
1734 void (*sk_clone_security)(const struct sock *sk, struct sock *newsk);
1735 void (*sk_getsecid)(struct sock *sk, u32 *secid);
1736 void (*sock_graft)(struct sock *sk, struct socket *parent);
1737 int (*inet_conn_request)(struct sock *sk, struct sk_buff *skb,
1738 struct request_sock *req);
1739 void (*inet_csk_clone)(struct sock *newsk,
1740 const struct request_sock *req);
1741 void (*inet_conn_established)(struct sock *sk, struct sk_buff *skb);
1742 int (*secmark_relabel_packet)(u32 secid);
1743 void (*secmark_refcount_inc)(void);
1744 void (*secmark_refcount_dec)(void);
1745 void (*req_classify_flow)(const struct request_sock *req,
1746 struct flowi *fl);
1747 int (*tun_dev_alloc_security)(void **security);
1748 void (*tun_dev_free_security)(void *security);
1749 int (*tun_dev_create)(void);
1750 int (*tun_dev_attach_queue)(void *security);
1751 int (*tun_dev_attach)(struct sock *sk, void *security);
1752 int (*tun_dev_open)(void *security);
1753 int (*sctp_assoc_request)(struct sctp_endpoint *ep,
1754 struct sk_buff *skb);
1755 int (*sctp_bind_connect)(struct sock *sk, int optname,
1756 struct sockaddr *address, int addrlen);
1757 void (*sctp_sk_clone)(struct sctp_endpoint *ep, struct sock *sk,
1758 struct sock *newsk);
1759 #endif /* CONFIG_SECURITY_NETWORK */
1760
1761 #ifdef CONFIG_SECURITY_INFINIBAND
1762 int (*ib_pkey_access)(void *sec, u64 subnet_prefix, u16 pkey);
1763 int (*ib_endport_manage_subnet)(void *sec, const char *dev_name,
1764 u8 port_num);
1765 int (*ib_alloc_security)(void **sec);
1766 void (*ib_free_security)(void *sec);
1767 #endif /* CONFIG_SECURITY_INFINIBAND */
1768
1769 #ifdef CONFIG_SECURITY_NETWORK_XFRM
1770 int (*xfrm_policy_alloc_security)(struct xfrm_sec_ctx **ctxp,
1771 struct xfrm_user_sec_ctx *sec_ctx,
1772 gfp_t gfp);
1773 int (*xfrm_policy_clone_security)(struct xfrm_sec_ctx *old_ctx,
1774 struct xfrm_sec_ctx **new_ctx);
1775 void (*xfrm_policy_free_security)(struct xfrm_sec_ctx *ctx);
1776 int (*xfrm_policy_delete_security)(struct xfrm_sec_ctx *ctx);
1777 int (*xfrm_state_alloc)(struct xfrm_state *x,
1778 struct xfrm_user_sec_ctx *sec_ctx);
1779 int (*xfrm_state_alloc_acquire)(struct xfrm_state *x,
1780 struct xfrm_sec_ctx *polsec,
1781 u32 secid);
1782 void (*xfrm_state_free_security)(struct xfrm_state *x);
1783 int (*xfrm_state_delete_security)(struct xfrm_state *x);
1784 int (*xfrm_policy_lookup)(struct xfrm_sec_ctx *ctx, u32 fl_secid,
1785 u8 dir);
1786 int (*xfrm_state_pol_flow_match)(struct xfrm_state *x,
1787 struct xfrm_policy *xp,
1788 const struct flowi *fl);
1789 int (*xfrm_decode_session)(struct sk_buff *skb, u32 *secid, int ckall);
1790 #endif /* CONFIG_SECURITY_NETWORK_XFRM */
1791
1792 /* key management security hooks */
1793 #ifdef CONFIG_KEYS
1794 int (*key_alloc)(struct key *key, const struct cred *cred,
1795 unsigned long flags);
1796 void (*key_free)(struct key *key);
1797 int (*key_permission)(key_ref_t key_ref, const struct cred *cred,
1798 unsigned perm);
1799 int (*key_getsecurity)(struct key *key, char **_buffer);
1800 #endif /* CONFIG_KEYS */
1801
1802 #ifdef CONFIG_AUDIT
1803 int (*audit_rule_init)(u32 field, u32 op, char *rulestr,
1804 void **lsmrule);
1805 int (*audit_rule_known)(struct audit_krule *krule);
1806 int (*audit_rule_match)(u32 secid, u32 field, u32 op, void *lsmrule);
1807 void (*audit_rule_free)(void *lsmrule);
1808 #endif /* CONFIG_AUDIT */
1809
1810 #ifdef CONFIG_BPF_SYSCALL
1811 int (*bpf)(int cmd, union bpf_attr *attr,
1812 unsigned int size);
1813 int (*bpf_map)(struct bpf_map *map, fmode_t fmode);
1814 int (*bpf_prog)(struct bpf_prog *prog);
1815 int (*bpf_map_alloc_security)(struct bpf_map *map);
1816 void (*bpf_map_free_security)(struct bpf_map *map);
1817 int (*bpf_prog_alloc_security)(struct bpf_prog_aux *aux);
1818 void (*bpf_prog_free_security)(struct bpf_prog_aux *aux);
1819 #endif /* CONFIG_BPF_SYSCALL */
1820 int (*locked_down)(enum lockdown_reason what);
1821 };
1822
1823 struct security_hook_heads {
1824 struct hlist_head binder_set_context_mgr;
1825 struct hlist_head binder_transaction;
1826 struct hlist_head binder_transfer_binder;
1827 struct hlist_head binder_transfer_file;
1828 struct hlist_head ptrace_access_check;
1829 struct hlist_head ptrace_traceme;
1830 struct hlist_head capget;
1831 struct hlist_head capset;
1832 struct hlist_head capable;
1833 struct hlist_head quotactl;
1834 struct hlist_head quota_on;
1835 struct hlist_head syslog;
1836 struct hlist_head settime;
1837 struct hlist_head vm_enough_memory;
1838 struct hlist_head bprm_set_creds;
1839 struct hlist_head bprm_check_security;
1840 struct hlist_head bprm_committing_creds;
1841 struct hlist_head bprm_committed_creds;
1842 struct hlist_head fs_context_dup;
1843 struct hlist_head fs_context_parse_param;
1844 struct hlist_head sb_alloc_security;
1845 struct hlist_head sb_free_security;
1846 struct hlist_head sb_free_mnt_opts;
1847 struct hlist_head sb_eat_lsm_opts;
1848 struct hlist_head sb_remount;
1849 struct hlist_head sb_kern_mount;
1850 struct hlist_head sb_show_options;
1851 struct hlist_head sb_statfs;
1852 struct hlist_head sb_mount;
1853 struct hlist_head sb_umount;
1854 struct hlist_head sb_pivotroot;
1855 struct hlist_head sb_set_mnt_opts;
1856 struct hlist_head sb_clone_mnt_opts;
1857 struct hlist_head sb_add_mnt_opt;
1858 struct hlist_head move_mount;
1859 struct hlist_head dentry_init_security;
1860 struct hlist_head dentry_create_files_as;
1861 #ifdef CONFIG_SECURITY_PATH
1862 struct hlist_head path_unlink;
1863 struct hlist_head path_mkdir;
1864 struct hlist_head path_rmdir;
1865 struct hlist_head path_mknod;
1866 struct hlist_head path_truncate;
1867 struct hlist_head path_symlink;
1868 struct hlist_head path_link;
1869 struct hlist_head path_rename;
1870 struct hlist_head path_chmod;
1871 struct hlist_head path_chown;
1872 struct hlist_head path_chroot;
1873 #endif
1874 /* Needed for inode based modules as well */
1875 struct hlist_head path_notify;
1876 struct hlist_head inode_alloc_security;
1877 struct hlist_head inode_free_security;
1878 struct hlist_head inode_init_security;
1879 struct hlist_head inode_create;
1880 struct hlist_head inode_link;
1881 struct hlist_head inode_unlink;
1882 struct hlist_head inode_symlink;
1883 struct hlist_head inode_mkdir;
1884 struct hlist_head inode_rmdir;
1885 struct hlist_head inode_mknod;
1886 struct hlist_head inode_rename;
1887 struct hlist_head inode_readlink;
1888 struct hlist_head inode_follow_link;
1889 struct hlist_head inode_permission;
1890 struct hlist_head inode_setattr;
1891 struct hlist_head inode_getattr;
1892 struct hlist_head inode_setxattr;
1893 struct hlist_head inode_post_setxattr;
1894 struct hlist_head inode_getxattr;
1895 struct hlist_head inode_listxattr;
1896 struct hlist_head inode_removexattr;
1897 struct hlist_head inode_need_killpriv;
1898 struct hlist_head inode_killpriv;
1899 struct hlist_head inode_getsecurity;
1900 struct hlist_head inode_setsecurity;
1901 struct hlist_head inode_listsecurity;
1902 struct hlist_head inode_getsecid;
1903 struct hlist_head inode_copy_up;
1904 struct hlist_head inode_copy_up_xattr;
1905 struct hlist_head kernfs_init_security;
1906 struct hlist_head file_permission;
1907 struct hlist_head file_alloc_security;
1908 struct hlist_head file_free_security;
1909 struct hlist_head file_ioctl;
1910 struct hlist_head mmap_addr;
1911 struct hlist_head mmap_file;
1912 struct hlist_head file_mprotect;
1913 struct hlist_head file_lock;
1914 struct hlist_head file_fcntl;
1915 struct hlist_head file_set_fowner;
1916 struct hlist_head file_send_sigiotask;
1917 struct hlist_head file_receive;
1918 struct hlist_head file_open;
1919 struct hlist_head task_alloc;
1920 struct hlist_head task_free;
1921 struct hlist_head cred_alloc_blank;
1922 struct hlist_head cred_free;
1923 struct hlist_head cred_prepare;
1924 struct hlist_head cred_transfer;
1925 struct hlist_head cred_getsecid;
1926 struct hlist_head kernel_act_as;
1927 struct hlist_head kernel_create_files_as;
1928 struct hlist_head kernel_load_data;
1929 struct hlist_head kernel_read_file;
1930 struct hlist_head kernel_post_read_file;
1931 struct hlist_head kernel_module_request;
1932 struct hlist_head task_fix_setuid;
1933 struct hlist_head task_setpgid;
1934 struct hlist_head task_getpgid;
1935 struct hlist_head task_getsid;
1936 struct hlist_head task_getsecid;
1937 struct hlist_head task_setnice;
1938 struct hlist_head task_setioprio;
1939 struct hlist_head task_getioprio;
1940 struct hlist_head task_prlimit;
1941 struct hlist_head task_setrlimit;
1942 struct hlist_head task_setscheduler;
1943 struct hlist_head task_getscheduler;
1944 struct hlist_head task_movememory;
1945 struct hlist_head task_kill;
1946 struct hlist_head task_prctl;
1947 struct hlist_head task_to_inode;
1948 struct hlist_head ipc_permission;
1949 struct hlist_head ipc_getsecid;
1950 struct hlist_head msg_msg_alloc_security;
1951 struct hlist_head msg_msg_free_security;
1952 struct hlist_head msg_queue_alloc_security;
1953 struct hlist_head msg_queue_free_security;
1954 struct hlist_head msg_queue_associate;
1955 struct hlist_head msg_queue_msgctl;
1956 struct hlist_head msg_queue_msgsnd;
1957 struct hlist_head msg_queue_msgrcv;
1958 struct hlist_head shm_alloc_security;
1959 struct hlist_head shm_free_security;
1960 struct hlist_head shm_associate;
1961 struct hlist_head shm_shmctl;
1962 struct hlist_head shm_shmat;
1963 struct hlist_head sem_alloc_security;
1964 struct hlist_head sem_free_security;
1965 struct hlist_head sem_associate;
1966 struct hlist_head sem_semctl;
1967 struct hlist_head sem_semop;
1968 struct hlist_head netlink_send;
1969 struct hlist_head d_instantiate;
1970 struct hlist_head getprocattr;
1971 struct hlist_head setprocattr;
1972 struct hlist_head ismaclabel;
1973 struct hlist_head secid_to_secctx;
1974 struct hlist_head secctx_to_secid;
1975 struct hlist_head release_secctx;
1976 struct hlist_head inode_invalidate_secctx;
1977 struct hlist_head inode_notifysecctx;
1978 struct hlist_head inode_setsecctx;
1979 struct hlist_head inode_getsecctx;
1980 #ifdef CONFIG_SECURITY_NETWORK
1981 struct hlist_head unix_stream_connect;
1982 struct hlist_head unix_may_send;
1983 struct hlist_head socket_create;
1984 struct hlist_head socket_post_create;
1985 struct hlist_head socket_socketpair;
1986 struct hlist_head socket_bind;
1987 struct hlist_head socket_connect;
1988 struct hlist_head socket_listen;
1989 struct hlist_head socket_accept;
1990 struct hlist_head socket_sendmsg;
1991 struct hlist_head socket_recvmsg;
1992 struct hlist_head socket_getsockname;
1993 struct hlist_head socket_getpeername;
1994 struct hlist_head socket_getsockopt;
1995 struct hlist_head socket_setsockopt;
1996 struct hlist_head socket_shutdown;
1997 struct hlist_head socket_sock_rcv_skb;
1998 struct hlist_head socket_getpeersec_stream;
1999 struct hlist_head socket_getpeersec_dgram;
2000 struct hlist_head sk_alloc_security;
2001 struct hlist_head sk_free_security;
2002 struct hlist_head sk_clone_security;
2003 struct hlist_head sk_getsecid;
2004 struct hlist_head sock_graft;
2005 struct hlist_head inet_conn_request;
2006 struct hlist_head inet_csk_clone;
2007 struct hlist_head inet_conn_established;
2008 struct hlist_head secmark_relabel_packet;
2009 struct hlist_head secmark_refcount_inc;
2010 struct hlist_head secmark_refcount_dec;
2011 struct hlist_head req_classify_flow;
2012 struct hlist_head tun_dev_alloc_security;
2013 struct hlist_head tun_dev_free_security;
2014 struct hlist_head tun_dev_create;
2015 struct hlist_head tun_dev_attach_queue;
2016 struct hlist_head tun_dev_attach;
2017 struct hlist_head tun_dev_open;
2018 struct hlist_head sctp_assoc_request;
2019 struct hlist_head sctp_bind_connect;
2020 struct hlist_head sctp_sk_clone;
2021 #endif /* CONFIG_SECURITY_NETWORK */
2022 #ifdef CONFIG_SECURITY_INFINIBAND
2023 struct hlist_head ib_pkey_access;
2024 struct hlist_head ib_endport_manage_subnet;
2025 struct hlist_head ib_alloc_security;
2026 struct hlist_head ib_free_security;
2027 #endif /* CONFIG_SECURITY_INFINIBAND */
2028 #ifdef CONFIG_SECURITY_NETWORK_XFRM
2029 struct hlist_head xfrm_policy_alloc_security;
2030 struct hlist_head xfrm_policy_clone_security;
2031 struct hlist_head xfrm_policy_free_security;
2032 struct hlist_head xfrm_policy_delete_security;
2033 struct hlist_head xfrm_state_alloc;
2034 struct hlist_head xfrm_state_alloc_acquire;
2035 struct hlist_head xfrm_state_free_security;
2036 struct hlist_head xfrm_state_delete_security;
2037 struct hlist_head xfrm_policy_lookup;
2038 struct hlist_head xfrm_state_pol_flow_match;
2039 struct hlist_head xfrm_decode_session;
2040 #endif /* CONFIG_SECURITY_NETWORK_XFRM */
2041 #ifdef CONFIG_KEYS
2042 struct hlist_head key_alloc;
2043 struct hlist_head key_free;
2044 struct hlist_head key_permission;
2045 struct hlist_head key_getsecurity;
2046 #endif /* CONFIG_KEYS */
2047 #ifdef CONFIG_AUDIT
2048 struct hlist_head audit_rule_init;
2049 struct hlist_head audit_rule_known;
2050 struct hlist_head audit_rule_match;
2051 struct hlist_head audit_rule_free;
2052 #endif /* CONFIG_AUDIT */
2053 #ifdef CONFIG_BPF_SYSCALL
2054 struct hlist_head bpf;
2055 struct hlist_head bpf_map;
2056 struct hlist_head bpf_prog;
2057 struct hlist_head bpf_map_alloc_security;
2058 struct hlist_head bpf_map_free_security;
2059 struct hlist_head bpf_prog_alloc_security;
2060 struct hlist_head bpf_prog_free_security;
2061 #endif /* CONFIG_BPF_SYSCALL */
2062 struct hlist_head locked_down;
2063 } __randomize_layout;
2064
2065 /*
2066 * Security module hook list structure.
2067 * For use with generic list macros for common operations.
2068 */
2069 struct security_hook_list {
2070 struct hlist_node list;
2071 struct hlist_head *head;
2072 union security_list_options hook;
2073 char *lsm;
2074 } __randomize_layout;
2075
2076 /*
2077 * Security blob size or offset data.
2078 */
2079 struct lsm_blob_sizes {
2080 int lbs_cred;
2081 int lbs_file;
2082 int lbs_inode;
2083 int lbs_ipc;
2084 int lbs_msg_msg;
2085 int lbs_task;
2086 };
2087
2088 /*
2089 * Initializing a security_hook_list structure takes
2090 * up a lot of space in a source file. This macro takes
2091 * care of the common case and reduces the amount of
2092 * text involved.
2093 */
2094 #define LSM_HOOK_INIT(HEAD, HOOK) \
2095 { .head = &security_hook_heads.HEAD, .hook = { .HEAD = HOOK } }
2096
2097 extern struct security_hook_heads security_hook_heads;
2098 extern char *lsm_names;
2099
2100 extern void security_add_hooks(struct security_hook_list *hooks, int count,
2101 char *lsm);
2102
2103 #define LSM_FLAG_LEGACY_MAJOR BIT(0)
2104 #define LSM_FLAG_EXCLUSIVE BIT(1)
2105
2106 enum lsm_order {
2107 LSM_ORDER_FIRST = -1, /* This is only for capabilities. */
2108 LSM_ORDER_MUTABLE = 0,
2109 };
2110
2111 struct lsm_info {
2112 const char *name; /* Required. */
2113 enum lsm_order order; /* Optional: default is LSM_ORDER_MUTABLE */
2114 unsigned long flags; /* Optional: flags describing LSM */
2115 int *enabled; /* Optional: controlled by CONFIG_LSM */
2116 int (*init)(void); /* Required. */
2117 struct lsm_blob_sizes *blobs; /* Optional: for blob sharing. */
2118 };
2119
2120 extern struct lsm_info __start_lsm_info[], __end_lsm_info[];
2121 extern struct lsm_info __start_early_lsm_info[], __end_early_lsm_info[];
2122
2123 #define DEFINE_LSM(lsm) \
2124 static struct lsm_info __lsm_##lsm \
2125 __used __section(.lsm_info.init) \
2126 __aligned(sizeof(unsigned long))
2127
2128 #define DEFINE_EARLY_LSM(lsm) \
2129 static struct lsm_info __early_lsm_##lsm \
2130 __used __section(.early_lsm_info.init) \
2131 __aligned(sizeof(unsigned long))
2132
2133 #ifdef CONFIG_SECURITY_SELINUX_DISABLE
2134 /*
2135 * Assuring the safety of deleting a security module is up to
2136 * the security module involved. This may entail ordering the
2137 * module's hook list in a particular way, refusing to disable
2138 * the module once a policy is loaded or any number of other
2139 * actions better imagined than described.
2140 *
2141 * The name of the configuration option reflects the only module
2142 * that currently uses the mechanism. Any developer who thinks
2143 * disabling their module is a good idea needs to be at least as
2144 * careful as the SELinux team.
2145 */
2146 static inline void security_delete_hooks(struct security_hook_list *hooks,
2147 int count)
2148 {
2149 int i;
2150
2151 for (i = 0; i < count; i++)
2152 hlist_del_rcu(&hooks[i].list);
2153 }
2154 #endif /* CONFIG_SECURITY_SELINUX_DISABLE */
2155
2156 /* Currently required to handle SELinux runtime hook disable. */
2157 #ifdef CONFIG_SECURITY_WRITABLE_HOOKS
2158 #define __lsm_ro_after_init
2159 #else
2160 #define __lsm_ro_after_init __ro_after_init
2161 #endif /* CONFIG_SECURITY_WRITABLE_HOOKS */
2162
2163 extern int lsm_inode_alloc(struct inode *inode);
2164
2165 #endif /* ! __LINUX_LSM_HOOKS_H */