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