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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> | |
b1d9e6b0 CS |
28 | #include <linux/init.h> |
29 | #include <linux/rculist.h> | |
3c4ed7bd | 30 | |
fe7bb272 | 31 | /** |
fe7bb272 CS |
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. | |
e22619a2 LT |
318 | * @inode contains the inode, which itself is not stable in RCU-walk |
319 | * @rcu indicates whether we are in RCU-walk mode. | |
fe7bb272 CS |
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. | |
b44a7dfc MZ |
564 | * @kernel_post_read_file: |
565 | * Read a file specified by userspace. | |
566 | * @file contains the file structure pointing to the file being read | |
567 | * by the kernel. | |
568 | * @buf pointer to buffer containing the file contents. | |
569 | * @size length of the file contents. | |
bc8ca5b9 | 570 | * @id kernel read file identifier |
b44a7dfc | 571 | * Return 0 if permission is granted. |
fe7bb272 CS |
572 | * @task_fix_setuid: |
573 | * Update the module's state after setting one or more of the user | |
574 | * identity attributes of the current process. The @flags parameter | |
575 | * indicates which of the set*uid system calls invoked this hook. If | |
576 | * @new is the set of credentials that will be installed. Modifications | |
577 | * should be made to this rather than to @current->cred. | |
578 | * @old is the set of credentials that are being replaces | |
579 | * @flags contains one of the LSM_SETID_* values. | |
580 | * Return 0 on success. | |
581 | * @task_setpgid: | |
582 | * Check permission before setting the process group identifier of the | |
583 | * process @p to @pgid. | |
584 | * @p contains the task_struct for process being modified. | |
585 | * @pgid contains the new pgid. | |
586 | * Return 0 if permission is granted. | |
587 | * @task_getpgid: | |
588 | * Check permission before getting the process group identifier of the | |
589 | * process @p. | |
590 | * @p contains the task_struct for the process. | |
591 | * Return 0 if permission is granted. | |
592 | * @task_getsid: | |
593 | * Check permission before getting the session identifier of the process | |
594 | * @p. | |
595 | * @p contains the task_struct for the process. | |
596 | * Return 0 if permission is granted. | |
597 | * @task_getsecid: | |
598 | * Retrieve the security identifier of the process @p. | |
599 | * @p contains the task_struct for the process and place is into @secid. | |
600 | * In case of failure, @secid will be set to zero. | |
601 | * | |
602 | * @task_setnice: | |
603 | * Check permission before setting the nice value of @p to @nice. | |
604 | * @p contains the task_struct of process. | |
605 | * @nice contains the new nice value. | |
606 | * Return 0 if permission is granted. | |
607 | * @task_setioprio | |
608 | * Check permission before setting the ioprio value of @p to @ioprio. | |
609 | * @p contains the task_struct of process. | |
610 | * @ioprio contains the new ioprio value | |
611 | * Return 0 if permission is granted. | |
612 | * @task_getioprio | |
613 | * Check permission before getting the ioprio value of @p. | |
614 | * @p contains the task_struct of process. | |
615 | * Return 0 if permission is granted. | |
616 | * @task_setrlimit: | |
617 | * Check permission before setting the resource limits of the current | |
618 | * process for @resource to @new_rlim. The old resource limit values can | |
619 | * be examined by dereferencing (current->signal->rlim + resource). | |
620 | * @resource contains the resource whose limit is being set. | |
621 | * @new_rlim contains the new limits for @resource. | |
622 | * Return 0 if permission is granted. | |
623 | * @task_setscheduler: | |
624 | * Check permission before setting scheduling policy and/or parameters of | |
625 | * process @p based on @policy and @lp. | |
626 | * @p contains the task_struct for process. | |
627 | * @policy contains the scheduling policy. | |
628 | * @lp contains the scheduling parameters. | |
629 | * Return 0 if permission is granted. | |
630 | * @task_getscheduler: | |
631 | * Check permission before obtaining scheduling information for process | |
632 | * @p. | |
633 | * @p contains the task_struct for process. | |
634 | * Return 0 if permission is granted. | |
635 | * @task_movememory | |
636 | * Check permission before moving memory owned by process @p. | |
637 | * @p contains the task_struct for process. | |
638 | * Return 0 if permission is granted. | |
639 | * @task_kill: | |
640 | * Check permission before sending signal @sig to @p. @info can be NULL, | |
641 | * the constant 1, or a pointer to a siginfo structure. If @info is 1 or | |
642 | * SI_FROMKERNEL(info) is true, then the signal should be viewed as coming | |
643 | * from the kernel and should typically be permitted. | |
644 | * SIGIO signals are handled separately by the send_sigiotask hook in | |
645 | * file_security_ops. | |
646 | * @p contains the task_struct for process. | |
647 | * @info contains the signal information. | |
648 | * @sig contains the signal value. | |
649 | * @secid contains the sid of the process where the signal originated | |
650 | * Return 0 if permission is granted. | |
651 | * @task_wait: | |
652 | * Check permission before allowing a process to reap a child process @p | |
653 | * and collect its status information. | |
654 | * @p contains the task_struct for process. | |
655 | * Return 0 if permission is granted. | |
656 | * @task_prctl: | |
657 | * Check permission before performing a process control operation on the | |
658 | * current process. | |
659 | * @option contains the operation. | |
660 | * @arg2 contains a argument. | |
661 | * @arg3 contains a argument. | |
662 | * @arg4 contains a argument. | |
663 | * @arg5 contains a argument. | |
664 | * Return -ENOSYS if no-one wanted to handle this op, any other value to | |
665 | * cause prctl() to return immediately with that value. | |
666 | * @task_to_inode: | |
667 | * Set the security attributes for an inode based on an associated task's | |
668 | * security attributes, e.g. for /proc/pid inodes. | |
669 | * @p contains the task_struct for the task. | |
670 | * @inode contains the inode structure for the inode. | |
671 | * | |
672 | * Security hooks for Netlink messaging. | |
673 | * | |
674 | * @netlink_send: | |
675 | * Save security information for a netlink message so that permission | |
676 | * checking can be performed when the message is processed. The security | |
677 | * information can be saved using the eff_cap field of the | |
678 | * netlink_skb_parms structure. Also may be used to provide fine | |
679 | * grained control over message transmission. | |
680 | * @sk associated sock of task sending the message. | |
681 | * @skb contains the sk_buff structure for the netlink message. | |
682 | * Return 0 if the information was successfully saved and message | |
683 | * is allowed to be transmitted. | |
684 | * | |
685 | * Security hooks for Unix domain networking. | |
686 | * | |
687 | * @unix_stream_connect: | |
688 | * Check permissions before establishing a Unix domain stream connection | |
689 | * between @sock and @other. | |
690 | * @sock contains the sock structure. | |
691 | * @other contains the peer sock structure. | |
692 | * @newsk contains the new sock structure. | |
693 | * Return 0 if permission is granted. | |
694 | * @unix_may_send: | |
695 | * Check permissions before connecting or sending datagrams from @sock to | |
696 | * @other. | |
697 | * @sock contains the socket structure. | |
698 | * @other contains the peer socket structure. | |
699 | * Return 0 if permission is granted. | |
700 | * | |
701 | * The @unix_stream_connect and @unix_may_send hooks were necessary because | |
702 | * Linux provides an alternative to the conventional file name space for Unix | |
703 | * domain sockets. Whereas binding and connecting to sockets in the file name | |
704 | * space is mediated by the typical file permissions (and caught by the mknod | |
705 | * and permission hooks in inode_security_ops), binding and connecting to | |
706 | * sockets in the abstract name space is completely unmediated. Sufficient | |
707 | * control of Unix domain sockets in the abstract name space isn't possible | |
708 | * using only the socket layer hooks, since we need to know the actual target | |
709 | * socket, which is not looked up until we are inside the af_unix code. | |
710 | * | |
711 | * Security hooks for socket operations. | |
712 | * | |
713 | * @socket_create: | |
714 | * Check permissions prior to creating a new socket. | |
715 | * @family contains the requested protocol family. | |
716 | * @type contains the requested communications type. | |
717 | * @protocol contains the requested protocol. | |
718 | * @kern set to 1 if a kernel socket. | |
719 | * Return 0 if permission is granted. | |
720 | * @socket_post_create: | |
721 | * This hook allows a module to update or allocate a per-socket security | |
722 | * structure. Note that the security field was not added directly to the | |
723 | * socket structure, but rather, the socket security information is stored | |
724 | * in the associated inode. Typically, the inode alloc_security hook will | |
725 | * allocate and and attach security information to | |
726 | * sock->inode->i_security. This hook may be used to update the | |
727 | * sock->inode->i_security field with additional information that wasn't | |
728 | * available when the inode was allocated. | |
729 | * @sock contains the newly created socket structure. | |
730 | * @family contains the requested protocol family. | |
731 | * @type contains the requested communications type. | |
732 | * @protocol contains the requested protocol. | |
733 | * @kern set to 1 if a kernel socket. | |
734 | * @socket_bind: | |
735 | * Check permission before socket protocol layer bind operation is | |
736 | * performed and the socket @sock is bound to the address specified in the | |
737 | * @address parameter. | |
738 | * @sock contains the socket structure. | |
739 | * @address contains the address to bind to. | |
740 | * @addrlen contains the length of address. | |
741 | * Return 0 if permission is granted. | |
742 | * @socket_connect: | |
743 | * Check permission before socket protocol layer connect operation | |
744 | * attempts to connect socket @sock to a remote address, @address. | |
745 | * @sock contains the socket structure. | |
746 | * @address contains the address of remote endpoint. | |
747 | * @addrlen contains the length of address. | |
748 | * Return 0 if permission is granted. | |
749 | * @socket_listen: | |
750 | * Check permission before socket protocol layer listen operation. | |
751 | * @sock contains the socket structure. | |
752 | * @backlog contains the maximum length for the pending connection queue. | |
753 | * Return 0 if permission is granted. | |
754 | * @socket_accept: | |
755 | * Check permission before accepting a new connection. Note that the new | |
756 | * socket, @newsock, has been created and some information copied to it, | |
757 | * but the accept operation has not actually been performed. | |
758 | * @sock contains the listening socket structure. | |
759 | * @newsock contains the newly created server socket for connection. | |
760 | * Return 0 if permission is granted. | |
761 | * @socket_sendmsg: | |
762 | * Check permission before transmitting a message to another socket. | |
763 | * @sock contains the socket structure. | |
764 | * @msg contains the message to be transmitted. | |
765 | * @size contains the size of message. | |
766 | * Return 0 if permission is granted. | |
767 | * @socket_recvmsg: | |
768 | * Check permission before receiving a message from a socket. | |
769 | * @sock contains the socket structure. | |
770 | * @msg contains the message structure. | |
771 | * @size contains the size of message structure. | |
772 | * @flags contains the operational flags. | |
773 | * Return 0 if permission is granted. | |
774 | * @socket_getsockname: | |
775 | * Check permission before the local address (name) of the socket object | |
776 | * @sock is retrieved. | |
777 | * @sock contains the socket structure. | |
778 | * Return 0 if permission is granted. | |
779 | * @socket_getpeername: | |
780 | * Check permission before the remote address (name) of a socket object | |
781 | * @sock is retrieved. | |
782 | * @sock contains the socket structure. | |
783 | * Return 0 if permission is granted. | |
784 | * @socket_getsockopt: | |
785 | * Check permissions before retrieving the options associated with socket | |
786 | * @sock. | |
787 | * @sock contains the socket structure. | |
788 | * @level contains the protocol level to retrieve option from. | |
789 | * @optname contains the name of option to retrieve. | |
790 | * Return 0 if permission is granted. | |
791 | * @socket_setsockopt: | |
792 | * Check permissions before setting the options associated with socket | |
793 | * @sock. | |
794 | * @sock contains the socket structure. | |
795 | * @level contains the protocol level to set options for. | |
796 | * @optname contains the name of the option to set. | |
797 | * Return 0 if permission is granted. | |
798 | * @socket_shutdown: | |
799 | * Checks permission before all or part of a connection on the socket | |
800 | * @sock is shut down. | |
801 | * @sock contains the socket structure. | |
802 | * @how contains the flag indicating how future sends and receives | |
803 | * are handled. | |
804 | * Return 0 if permission is granted. | |
805 | * @socket_sock_rcv_skb: | |
806 | * Check permissions on incoming network packets. This hook is distinct | |
807 | * from Netfilter's IP input hooks since it is the first time that the | |
808 | * incoming sk_buff @skb has been associated with a particular socket, @sk. | |
809 | * Must not sleep inside this hook because some callers hold spinlocks. | |
810 | * @sk contains the sock (not socket) associated with the incoming sk_buff. | |
811 | * @skb contains the incoming network data. | |
812 | * @socket_getpeersec_stream: | |
813 | * This hook allows the security module to provide peer socket security | |
814 | * state for unix or connected tcp sockets to userspace via getsockopt | |
815 | * SO_GETPEERSEC. For tcp sockets this can be meaningful if the | |
816 | * socket is associated with an ipsec SA. | |
817 | * @sock is the local socket. | |
818 | * @optval userspace memory where the security state is to be copied. | |
819 | * @optlen userspace int where the module should copy the actual length | |
820 | * of the security state. | |
821 | * @len as input is the maximum length to copy to userspace provided | |
822 | * by the caller. | |
823 | * Return 0 if all is well, otherwise, typical getsockopt return | |
824 | * values. | |
825 | * @socket_getpeersec_dgram: | |
826 | * This hook allows the security module to provide peer socket security | |
827 | * state for udp sockets on a per-packet basis to userspace via | |
828 | * getsockopt SO_GETPEERSEC. The application must first have indicated | |
829 | * the IP_PASSSEC option via getsockopt. It can then retrieve the | |
830 | * security state returned by this hook for a packet via the SCM_SECURITY | |
831 | * ancillary message type. | |
832 | * @skb is the skbuff for the packet being queried | |
833 | * @secdata is a pointer to a buffer in which to copy the security data | |
834 | * @seclen is the maximum length for @secdata | |
835 | * Return 0 on success, error on failure. | |
836 | * @sk_alloc_security: | |
837 | * Allocate and attach a security structure to the sk->sk_security field, | |
838 | * which is used to copy security attributes between local stream sockets. | |
839 | * @sk_free_security: | |
840 | * Deallocate security structure. | |
841 | * @sk_clone_security: | |
842 | * Clone/copy security structure. | |
843 | * @sk_getsecid: | |
844 | * Retrieve the LSM-specific secid for the sock to enable caching | |
845 | * of network authorizations. | |
846 | * @sock_graft: | |
847 | * Sets the socket's isec sid to the sock's sid. | |
848 | * @inet_conn_request: | |
849 | * Sets the openreq's sid to socket's sid with MLS portion taken | |
850 | * from peer sid. | |
851 | * @inet_csk_clone: | |
852 | * Sets the new child socket's sid to the openreq sid. | |
853 | * @inet_conn_established: | |
854 | * Sets the connection's peersid to the secmark on skb. | |
855 | * @secmark_relabel_packet: | |
856 | * check if the process should be allowed to relabel packets to | |
857 | * the given secid | |
858 | * @security_secmark_refcount_inc | |
859 | * tells the LSM to increment the number of secmark labeling rules loaded | |
860 | * @security_secmark_refcount_dec | |
861 | * tells the LSM to decrement the number of secmark labeling rules loaded | |
862 | * @req_classify_flow: | |
863 | * Sets the flow's sid to the openreq sid. | |
864 | * @tun_dev_alloc_security: | |
865 | * This hook allows a module to allocate a security structure for a TUN | |
866 | * device. | |
867 | * @security pointer to a security structure pointer. | |
868 | * Returns a zero on success, negative values on failure. | |
869 | * @tun_dev_free_security: | |
870 | * This hook allows a module to free the security structure for a TUN | |
871 | * device. | |
872 | * @security pointer to the TUN device's security structure | |
873 | * @tun_dev_create: | |
874 | * Check permissions prior to creating a new TUN device. | |
875 | * @tun_dev_attach_queue: | |
876 | * Check permissions prior to attaching to a TUN device queue. | |
877 | * @security pointer to the TUN device's security structure. | |
878 | * @tun_dev_attach: | |
879 | * This hook can be used by the module to update any security state | |
880 | * associated with the TUN device's sock structure. | |
881 | * @sk contains the existing sock structure. | |
882 | * @security pointer to the TUN device's security structure. | |
883 | * @tun_dev_open: | |
884 | * This hook can be used by the module to update any security state | |
885 | * associated with the TUN device's security structure. | |
886 | * @security pointer to the TUN devices's security structure. | |
887 | * | |
888 | * Security hooks for XFRM operations. | |
889 | * | |
890 | * @xfrm_policy_alloc_security: | |
891 | * @ctxp is a pointer to the xfrm_sec_ctx being added to Security Policy | |
892 | * Database used by the XFRM system. | |
893 | * @sec_ctx contains the security context information being provided by | |
894 | * the user-level policy update program (e.g., setkey). | |
895 | * Allocate a security structure to the xp->security field; the security | |
896 | * field is initialized to NULL when the xfrm_policy is allocated. | |
897 | * Return 0 if operation was successful (memory to allocate, legal context) | |
898 | * @gfp is to specify the context for the allocation | |
899 | * @xfrm_policy_clone_security: | |
900 | * @old_ctx contains an existing xfrm_sec_ctx. | |
901 | * @new_ctxp contains a new xfrm_sec_ctx being cloned from old. | |
902 | * Allocate a security structure in new_ctxp that contains the | |
903 | * information from the old_ctx structure. | |
904 | * Return 0 if operation was successful (memory to allocate). | |
905 | * @xfrm_policy_free_security: | |
906 | * @ctx contains the xfrm_sec_ctx | |
907 | * Deallocate xp->security. | |
908 | * @xfrm_policy_delete_security: | |
909 | * @ctx contains the xfrm_sec_ctx. | |
910 | * Authorize deletion of xp->security. | |
911 | * @xfrm_state_alloc: | |
912 | * @x contains the xfrm_state being added to the Security Association | |
913 | * Database by the XFRM system. | |
914 | * @sec_ctx contains the security context information being provided by | |
915 | * the user-level SA generation program (e.g., setkey or racoon). | |
916 | * Allocate a security structure to the x->security field; the security | |
917 | * field is initialized to NULL when the xfrm_state is allocated. Set the | |
918 | * context to correspond to sec_ctx. Return 0 if operation was successful | |
919 | * (memory to allocate, legal context). | |
920 | * @xfrm_state_alloc_acquire: | |
921 | * @x contains the xfrm_state being added to the Security Association | |
922 | * Database by the XFRM system. | |
923 | * @polsec contains the policy's security context. | |
924 | * @secid contains the secid from which to take the mls portion of the | |
925 | * context. | |
926 | * Allocate a security structure to the x->security field; the security | |
927 | * field is initialized to NULL when the xfrm_state is allocated. Set the | |
928 | * context to correspond to secid. Return 0 if operation was successful | |
929 | * (memory to allocate, legal context). | |
930 | * @xfrm_state_free_security: | |
931 | * @x contains the xfrm_state. | |
932 | * Deallocate x->security. | |
933 | * @xfrm_state_delete_security: | |
934 | * @x contains the xfrm_state. | |
935 | * Authorize deletion of x->security. | |
936 | * @xfrm_policy_lookup: | |
937 | * @ctx contains the xfrm_sec_ctx for which the access control is being | |
938 | * checked. | |
939 | * @fl_secid contains the flow security label that is used to authorize | |
940 | * access to the policy xp. | |
941 | * @dir contains the direction of the flow (input or output). | |
942 | * Check permission when a flow selects a xfrm_policy for processing | |
943 | * XFRMs on a packet. The hook is called when selecting either a | |
944 | * per-socket policy or a generic xfrm policy. | |
945 | * Return 0 if permission is granted, -ESRCH otherwise, or -errno | |
946 | * on other errors. | |
947 | * @xfrm_state_pol_flow_match: | |
948 | * @x contains the state to match. | |
949 | * @xp contains the policy to check for a match. | |
950 | * @fl contains the flow to check for a match. | |
951 | * Return 1 if there is a match. | |
952 | * @xfrm_decode_session: | |
953 | * @skb points to skb to decode. | |
954 | * @secid points to the flow key secid to set. | |
955 | * @ckall says if all xfrms used should be checked for same secid. | |
956 | * Return 0 if ckall is zero or all xfrms used have the same secid. | |
957 | * | |
958 | * Security hooks affecting all Key Management operations | |
959 | * | |
960 | * @key_alloc: | |
961 | * Permit allocation of a key and assign security data. Note that key does | |
962 | * not have a serial number assigned at this point. | |
963 | * @key points to the key. | |
964 | * @flags is the allocation flags | |
965 | * Return 0 if permission is granted, -ve error otherwise. | |
966 | * @key_free: | |
967 | * Notification of destruction; free security data. | |
968 | * @key points to the key. | |
969 | * No return value. | |
970 | * @key_permission: | |
971 | * See whether a specific operational right is granted to a process on a | |
972 | * key. | |
973 | * @key_ref refers to the key (key pointer + possession attribute bit). | |
974 | * @cred points to the credentials to provide the context against which to | |
975 | * evaluate the security data on the key. | |
976 | * @perm describes the combination of permissions required of this key. | |
977 | * Return 0 if permission is granted, -ve error otherwise. | |
978 | * @key_getsecurity: | |
979 | * Get a textual representation of the security context attached to a key | |
980 | * for the purposes of honouring KEYCTL_GETSECURITY. This function | |
981 | * allocates the storage for the NUL-terminated string and the caller | |
982 | * should free it. | |
983 | * @key points to the key to be queried. | |
984 | * @_buffer points to a pointer that should be set to point to the | |
985 | * resulting string (if no label or an error occurs). | |
986 | * Return the length of the string (including terminating NUL) or -ve if | |
987 | * an error. | |
988 | * May also return 0 (and a NULL buffer pointer) if there is no label. | |
989 | * | |
990 | * Security hooks affecting all System V IPC operations. | |
991 | * | |
992 | * @ipc_permission: | |
993 | * Check permissions for access to IPC | |
994 | * @ipcp contains the kernel IPC permission structure | |
995 | * @flag contains the desired (requested) permission set | |
996 | * Return 0 if permission is granted. | |
997 | * @ipc_getsecid: | |
998 | * Get the secid associated with the ipc object. | |
999 | * @ipcp contains the kernel IPC permission structure. | |
1000 | * @secid contains a pointer to the location where result will be saved. | |
1001 | * In case of failure, @secid will be set to zero. | |
1002 | * | |
1003 | * Security hooks for individual messages held in System V IPC message queues | |
1004 | * @msg_msg_alloc_security: | |
1005 | * Allocate and attach a security structure to the msg->security field. | |
1006 | * The security field is initialized to NULL when the structure is first | |
1007 | * created. | |
1008 | * @msg contains the message structure to be modified. | |
1009 | * Return 0 if operation was successful and permission is granted. | |
1010 | * @msg_msg_free_security: | |
1011 | * Deallocate the security structure for this message. | |
1012 | * @msg contains the message structure to be modified. | |
1013 | * | |
1014 | * Security hooks for System V IPC Message Queues | |
1015 | * | |
1016 | * @msg_queue_alloc_security: | |
1017 | * Allocate and attach a security structure to the | |
1018 | * msq->q_perm.security field. The security field is initialized to | |
1019 | * NULL when the structure is first created. | |
1020 | * @msq contains the message queue structure to be modified. | |
1021 | * Return 0 if operation was successful and permission is granted. | |
1022 | * @msg_queue_free_security: | |
1023 | * Deallocate security structure for this message queue. | |
1024 | * @msq contains the message queue structure to be modified. | |
1025 | * @msg_queue_associate: | |
1026 | * Check permission when a message queue is requested through the | |
1027 | * msgget system call. This hook is only called when returning the | |
1028 | * message queue identifier for an existing message queue, not when a | |
1029 | * new message queue is created. | |
1030 | * @msq contains the message queue to act upon. | |
1031 | * @msqflg contains the operation control flags. | |
1032 | * Return 0 if permission is granted. | |
1033 | * @msg_queue_msgctl: | |
1034 | * Check permission when a message control operation specified by @cmd | |
1035 | * is to be performed on the message queue @msq. | |
1036 | * The @msq may be NULL, e.g. for IPC_INFO or MSG_INFO. | |
1037 | * @msq contains the message queue to act upon. May be NULL. | |
1038 | * @cmd contains the operation to be performed. | |
1039 | * Return 0 if permission is granted. | |
1040 | * @msg_queue_msgsnd: | |
1041 | * Check permission before a message, @msg, is enqueued on the message | |
1042 | * queue, @msq. | |
1043 | * @msq contains the message queue to send message to. | |
1044 | * @msg contains the message to be enqueued. | |
1045 | * @msqflg contains operational flags. | |
1046 | * Return 0 if permission is granted. | |
1047 | * @msg_queue_msgrcv: | |
1048 | * Check permission before a message, @msg, is removed from the message | |
1049 | * queue, @msq. The @target task structure contains a pointer to the | |
1050 | * process that will be receiving the message (not equal to the current | |
1051 | * process when inline receives are being performed). | |
1052 | * @msq contains the message queue to retrieve message from. | |
1053 | * @msg contains the message destination. | |
1054 | * @target contains the task structure for recipient process. | |
1055 | * @type contains the type of message requested. | |
1056 | * @mode contains the operational flags. | |
1057 | * Return 0 if permission is granted. | |
1058 | * | |
1059 | * Security hooks for System V Shared Memory Segments | |
1060 | * | |
1061 | * @shm_alloc_security: | |
1062 | * Allocate and attach a security structure to the shp->shm_perm.security | |
1063 | * field. The security field is initialized to NULL when the structure is | |
1064 | * first created. | |
1065 | * @shp contains the shared memory structure to be modified. | |
1066 | * Return 0 if operation was successful and permission is granted. | |
1067 | * @shm_free_security: | |
1068 | * Deallocate the security struct for this memory segment. | |
1069 | * @shp contains the shared memory structure to be modified. | |
1070 | * @shm_associate: | |
1071 | * Check permission when a shared memory region is requested through the | |
1072 | * shmget system call. This hook is only called when returning the shared | |
1073 | * memory region identifier for an existing region, not when a new shared | |
1074 | * memory region is created. | |
1075 | * @shp contains the shared memory structure to be modified. | |
1076 | * @shmflg contains the operation control flags. | |
1077 | * Return 0 if permission is granted. | |
1078 | * @shm_shmctl: | |
1079 | * Check permission when a shared memory control operation specified by | |
1080 | * @cmd is to be performed on the shared memory region @shp. | |
1081 | * The @shp may be NULL, e.g. for IPC_INFO or SHM_INFO. | |
1082 | * @shp contains shared memory structure to be modified. | |
1083 | * @cmd contains the operation to be performed. | |
1084 | * Return 0 if permission is granted. | |
1085 | * @shm_shmat: | |
1086 | * Check permissions prior to allowing the shmat system call to attach the | |
1087 | * shared memory segment @shp to the data segment of the calling process. | |
1088 | * The attaching address is specified by @shmaddr. | |
1089 | * @shp contains the shared memory structure to be modified. | |
1090 | * @shmaddr contains the address to attach memory region to. | |
1091 | * @shmflg contains the operational flags. | |
1092 | * Return 0 if permission is granted. | |
1093 | * | |
1094 | * Security hooks for System V Semaphores | |
1095 | * | |
1096 | * @sem_alloc_security: | |
1097 | * Allocate and attach a security structure to the sma->sem_perm.security | |
1098 | * field. The security field is initialized to NULL when the structure is | |
1099 | * first created. | |
1100 | * @sma contains the semaphore structure | |
1101 | * Return 0 if operation was successful and permission is granted. | |
1102 | * @sem_free_security: | |
1103 | * deallocate security struct for this semaphore | |
1104 | * @sma contains the semaphore structure. | |
1105 | * @sem_associate: | |
1106 | * Check permission when a semaphore is requested through the semget | |
1107 | * system call. This hook is only called when returning the semaphore | |
1108 | * identifier for an existing semaphore, not when a new one must be | |
1109 | * created. | |
1110 | * @sma contains the semaphore structure. | |
1111 | * @semflg contains the operation control flags. | |
1112 | * Return 0 if permission is granted. | |
1113 | * @sem_semctl: | |
1114 | * Check permission when a semaphore operation specified by @cmd is to be | |
1115 | * performed on the semaphore @sma. The @sma may be NULL, e.g. for | |
1116 | * IPC_INFO or SEM_INFO. | |
1117 | * @sma contains the semaphore structure. May be NULL. | |
1118 | * @cmd contains the operation to be performed. | |
1119 | * Return 0 if permission is granted. | |
1120 | * @sem_semop | |
1121 | * Check permissions before performing operations on members of the | |
1122 | * semaphore set @sma. If the @alter flag is nonzero, the semaphore set | |
1123 | * may be modified. | |
1124 | * @sma contains the semaphore structure. | |
1125 | * @sops contains the operations to perform. | |
1126 | * @nsops contains the number of operations to perform. | |
1127 | * @alter contains the flag indicating whether changes are to be made. | |
1128 | * Return 0 if permission is granted. | |
1129 | * | |
1130 | * @binder_set_context_mgr | |
1131 | * Check whether @mgr is allowed to be the binder context manager. | |
1132 | * @mgr contains the task_struct for the task being registered. | |
1133 | * Return 0 if permission is granted. | |
1134 | * @binder_transaction | |
1135 | * Check whether @from is allowed to invoke a binder transaction call | |
1136 | * to @to. | |
1137 | * @from contains the task_struct for the sending task. | |
1138 | * @to contains the task_struct for the receiving task. | |
1139 | * @binder_transfer_binder | |
1140 | * Check whether @from is allowed to transfer a binder reference to @to. | |
1141 | * @from contains the task_struct for the sending task. | |
1142 | * @to contains the task_struct for the receiving task. | |
1143 | * @binder_transfer_file | |
1144 | * Check whether @from is allowed to transfer @file to @to. | |
1145 | * @from contains the task_struct for the sending task. | |
1146 | * @file contains the struct file being transferred. | |
1147 | * @to contains the task_struct for the receiving task. | |
1148 | * | |
1149 | * @ptrace_access_check: | |
1150 | * Check permission before allowing the current process to trace the | |
1151 | * @child process. | |
1152 | * Security modules may also want to perform a process tracing check | |
1153 | * during an execve in the set_security or apply_creds hooks of | |
1154 | * tracing check during an execve in the bprm_set_creds hook of | |
1155 | * binprm_security_ops if the process is being traced and its security | |
1156 | * attributes would be changed by the execve. | |
1157 | * @child contains the task_struct structure for the target process. | |
1158 | * @mode contains the PTRACE_MODE flags indicating the form of access. | |
1159 | * Return 0 if permission is granted. | |
1160 | * @ptrace_traceme: | |
1161 | * Check that the @parent process has sufficient permission to trace the | |
1162 | * current process before allowing the current process to present itself | |
1163 | * to the @parent process for tracing. | |
1164 | * @parent contains the task_struct structure for debugger process. | |
1165 | * Return 0 if permission is granted. | |
1166 | * @capget: | |
1167 | * Get the @effective, @inheritable, and @permitted capability sets for | |
1168 | * the @target process. The hook may also perform permission checking to | |
1169 | * determine if the current process is allowed to see the capability sets | |
1170 | * of the @target process. | |
1171 | * @target contains the task_struct structure for target process. | |
1172 | * @effective contains the effective capability set. | |
1173 | * @inheritable contains the inheritable capability set. | |
1174 | * @permitted contains the permitted capability set. | |
1175 | * Return 0 if the capability sets were successfully obtained. | |
1176 | * @capset: | |
1177 | * Set the @effective, @inheritable, and @permitted capability sets for | |
1178 | * the current process. | |
1179 | * @new contains the new credentials structure for target process. | |
1180 | * @old contains the current credentials structure for target process. | |
1181 | * @effective contains the effective capability set. | |
1182 | * @inheritable contains the inheritable capability set. | |
1183 | * @permitted contains the permitted capability set. | |
1184 | * Return 0 and update @new if permission is granted. | |
1185 | * @capable: | |
1186 | * Check whether the @tsk process has the @cap capability in the indicated | |
1187 | * credentials. | |
1188 | * @cred contains the credentials to use. | |
1189 | * @ns contains the user namespace we want the capability in | |
1190 | * @cap contains the capability <include/linux/capability.h>. | |
1191 | * @audit: Whether to write an audit message or not | |
1192 | * Return 0 if the capability is granted for @tsk. | |
1193 | * @syslog: | |
1194 | * Check permission before accessing the kernel message ring or changing | |
1195 | * logging to the console. | |
1196 | * See the syslog(2) manual page for an explanation of the @type values. | |
1197 | * @type contains the type of action. | |
1198 | * @from_file indicates the context of action (if it came from /proc). | |
1199 | * Return 0 if permission is granted. | |
1200 | * @settime: | |
1201 | * Check permission to change the system time. | |
1202 | * struct timespec and timezone are defined in include/linux/time.h | |
1203 | * @ts contains new time | |
1204 | * @tz contains new timezone | |
1205 | * Return 0 if permission is granted. | |
1206 | * @vm_enough_memory: | |
1207 | * Check permissions for allocating a new virtual mapping. | |
1208 | * @mm contains the mm struct it is being added to. | |
1209 | * @pages contains the number of pages. | |
1210 | * Return 0 if permission is granted. | |
1211 | * | |
1212 | * @ismaclabel: | |
1213 | * Check if the extended attribute specified by @name | |
1214 | * represents a MAC label. Returns 1 if name is a MAC | |
1215 | * attribute otherwise returns 0. | |
1216 | * @name full extended attribute name to check against | |
1217 | * LSM as a MAC label. | |
1218 | * | |
1219 | * @secid_to_secctx: | |
1220 | * Convert secid to security context. If secdata is NULL the length of | |
1221 | * the result will be returned in seclen, but no secdata will be returned. | |
1222 | * This does mean that the length could change between calls to check the | |
1223 | * length and the next call which actually allocates and returns the | |
1224 | * secdata. | |
1225 | * @secid contains the security ID. | |
1226 | * @secdata contains the pointer that stores the converted security | |
1227 | * context. | |
1228 | * @seclen pointer which contains the length of the data | |
1229 | * @secctx_to_secid: | |
1230 | * Convert security context to secid. | |
1231 | * @secid contains the pointer to the generated security ID. | |
1232 | * @secdata contains the security context. | |
1233 | * | |
1234 | * @release_secctx: | |
1235 | * Release the security context. | |
1236 | * @secdata contains the security context. | |
1237 | * @seclen contains the length of the security context. | |
1238 | * | |
1239 | * Security hooks for Audit | |
1240 | * | |
1241 | * @audit_rule_init: | |
1242 | * Allocate and initialize an LSM audit rule structure. | |
1243 | * @field contains the required Audit action. | |
1244 | * Fields flags are defined in include/linux/audit.h | |
1245 | * @op contains the operator the rule uses. | |
1246 | * @rulestr contains the context where the rule will be applied to. | |
1247 | * @lsmrule contains a pointer to receive the result. | |
1248 | * Return 0 if @lsmrule has been successfully set, | |
1249 | * -EINVAL in case of an invalid rule. | |
1250 | * | |
1251 | * @audit_rule_known: | |
1252 | * Specifies whether given @rule contains any fields related to | |
1253 | * current LSM. | |
1254 | * @rule contains the audit rule of interest. | |
1255 | * Return 1 in case of relation found, 0 otherwise. | |
1256 | * | |
1257 | * @audit_rule_match: | |
1258 | * Determine if given @secid matches a rule previously approved | |
1259 | * by @audit_rule_known. | |
1260 | * @secid contains the security id in question. | |
1261 | * @field contains the field which relates to current LSM. | |
1262 | * @op contains the operator that will be used for matching. | |
1263 | * @rule points to the audit rule that will be checked against. | |
1264 | * @actx points to the audit context associated with the check. | |
1265 | * Return 1 if secid matches the rule, 0 if it does not, -ERRNO on failure. | |
1266 | * | |
1267 | * @audit_rule_free: | |
1268 | * Deallocate the LSM audit rule structure previously allocated by | |
1269 | * audit_rule_init. | |
1270 | * @rule contains the allocated rule | |
1271 | * | |
6f3be9f5 AG |
1272 | * @inode_invalidate_secctx: |
1273 | * Notify the security module that it must revalidate the security context | |
1274 | * of an inode. | |
1275 | * | |
fe7bb272 CS |
1276 | * @inode_notifysecctx: |
1277 | * Notify the security module of what the security context of an inode | |
1278 | * should be. Initializes the incore security context managed by the | |
1279 | * security module for this inode. Example usage: NFS client invokes | |
1280 | * this hook to initialize the security context in its incore inode to the | |
1281 | * value provided by the server for the file when the server returned the | |
1282 | * file's attributes to the client. | |
1283 | * | |
1284 | * Must be called with inode->i_mutex locked. | |
1285 | * | |
1286 | * @inode we wish to set the security context of. | |
1287 | * @ctx contains the string which we wish to set in the inode. | |
1288 | * @ctxlen contains the length of @ctx. | |
1289 | * | |
1290 | * @inode_setsecctx: | |
1291 | * Change the security context of an inode. Updates the | |
1292 | * incore security context managed by the security module and invokes the | |
1293 | * fs code as needed (via __vfs_setxattr_noperm) to update any backing | |
1294 | * xattrs that represent the context. Example usage: NFS server invokes | |
1295 | * this hook to change the security context in its incore inode and on the | |
1296 | * backing filesystem to a value provided by the client on a SETATTR | |
1297 | * operation. | |
1298 | * | |
1299 | * Must be called with inode->i_mutex locked. | |
1300 | * | |
1301 | * @dentry contains the inode we wish to set the security context of. | |
1302 | * @ctx contains the string which we wish to set in the inode. | |
1303 | * @ctxlen contains the length of @ctx. | |
1304 | * | |
1305 | * @inode_getsecctx: | |
1306 | * On success, returns 0 and fills out @ctx and @ctxlen with the security | |
1307 | * context for the given @inode. | |
1308 | * | |
1309 | * @inode we wish to get the security context of. | |
1310 | * @ctx is a pointer in which to place the allocated security context. | |
1311 | * @ctxlen points to the place to put the length of @ctx. | |
1312 | * This is the main security structure. | |
1313 | */ | |
1314 | ||
b1d9e6b0 | 1315 | union security_list_options { |
3c4ed7bd CS |
1316 | int (*binder_set_context_mgr)(struct task_struct *mgr); |
1317 | int (*binder_transaction)(struct task_struct *from, | |
1318 | struct task_struct *to); | |
1319 | int (*binder_transfer_binder)(struct task_struct *from, | |
1320 | struct task_struct *to); | |
1321 | int (*binder_transfer_file)(struct task_struct *from, | |
1322 | struct task_struct *to, | |
1323 | struct file *file); | |
1324 | ||
1325 | int (*ptrace_access_check)(struct task_struct *child, | |
1326 | unsigned int mode); | |
1327 | int (*ptrace_traceme)(struct task_struct *parent); | |
1328 | int (*capget)(struct task_struct *target, kernel_cap_t *effective, | |
1329 | kernel_cap_t *inheritable, kernel_cap_t *permitted); | |
1330 | int (*capset)(struct cred *new, const struct cred *old, | |
1331 | const kernel_cap_t *effective, | |
1332 | const kernel_cap_t *inheritable, | |
1333 | const kernel_cap_t *permitted); | |
1334 | int (*capable)(const struct cred *cred, struct user_namespace *ns, | |
1335 | int cap, int audit); | |
1336 | int (*quotactl)(int cmds, int type, int id, struct super_block *sb); | |
1337 | int (*quota_on)(struct dentry *dentry); | |
1338 | int (*syslog)(int type); | |
1339 | int (*settime)(const struct timespec *ts, const struct timezone *tz); | |
1340 | int (*vm_enough_memory)(struct mm_struct *mm, long pages); | |
1341 | ||
1342 | int (*bprm_set_creds)(struct linux_binprm *bprm); | |
1343 | int (*bprm_check_security)(struct linux_binprm *bprm); | |
1344 | int (*bprm_secureexec)(struct linux_binprm *bprm); | |
1345 | void (*bprm_committing_creds)(struct linux_binprm *bprm); | |
1346 | void (*bprm_committed_creds)(struct linux_binprm *bprm); | |
1347 | ||
1348 | int (*sb_alloc_security)(struct super_block *sb); | |
1349 | void (*sb_free_security)(struct super_block *sb); | |
1350 | int (*sb_copy_data)(char *orig, char *copy); | |
1351 | int (*sb_remount)(struct super_block *sb, void *data); | |
1352 | int (*sb_kern_mount)(struct super_block *sb, int flags, void *data); | |
1353 | int (*sb_show_options)(struct seq_file *m, struct super_block *sb); | |
1354 | int (*sb_statfs)(struct dentry *dentry); | |
1355 | int (*sb_mount)(const char *dev_name, struct path *path, | |
1356 | const char *type, unsigned long flags, void *data); | |
1357 | int (*sb_umount)(struct vfsmount *mnt, int flags); | |
1358 | int (*sb_pivotroot)(struct path *old_path, struct path *new_path); | |
1359 | int (*sb_set_mnt_opts)(struct super_block *sb, | |
1360 | struct security_mnt_opts *opts, | |
1361 | unsigned long kern_flags, | |
1362 | unsigned long *set_kern_flags); | |
1363 | int (*sb_clone_mnt_opts)(const struct super_block *oldsb, | |
1364 | struct super_block *newsb); | |
1365 | int (*sb_parse_opts_str)(char *options, struct security_mnt_opts *opts); | |
1366 | int (*dentry_init_security)(struct dentry *dentry, int mode, | |
1367 | struct qstr *name, void **ctx, | |
1368 | u32 *ctxlen); | |
1369 | ||
1370 | ||
1371 | #ifdef CONFIG_SECURITY_PATH | |
1372 | int (*path_unlink)(struct path *dir, struct dentry *dentry); | |
1373 | int (*path_mkdir)(struct path *dir, struct dentry *dentry, | |
1374 | umode_t mode); | |
1375 | int (*path_rmdir)(struct path *dir, struct dentry *dentry); | |
1376 | int (*path_mknod)(struct path *dir, struct dentry *dentry, | |
1377 | umode_t mode, unsigned int dev); | |
1378 | int (*path_truncate)(struct path *path); | |
1379 | int (*path_symlink)(struct path *dir, struct dentry *dentry, | |
1380 | const char *old_name); | |
1381 | int (*path_link)(struct dentry *old_dentry, struct path *new_dir, | |
1382 | struct dentry *new_dentry); | |
1383 | int (*path_rename)(struct path *old_dir, struct dentry *old_dentry, | |
1384 | struct path *new_dir, | |
1385 | struct dentry *new_dentry); | |
1386 | int (*path_chmod)(struct path *path, umode_t mode); | |
1387 | int (*path_chown)(struct path *path, kuid_t uid, kgid_t gid); | |
1388 | int (*path_chroot)(struct path *path); | |
1389 | #endif | |
1390 | ||
1391 | int (*inode_alloc_security)(struct inode *inode); | |
1392 | void (*inode_free_security)(struct inode *inode); | |
1393 | int (*inode_init_security)(struct inode *inode, struct inode *dir, | |
1394 | const struct qstr *qstr, | |
1395 | const char **name, void **value, | |
1396 | size_t *len); | |
1397 | int (*inode_create)(struct inode *dir, struct dentry *dentry, | |
1398 | umode_t mode); | |
1399 | int (*inode_link)(struct dentry *old_dentry, struct inode *dir, | |
1400 | struct dentry *new_dentry); | |
1401 | int (*inode_unlink)(struct inode *dir, struct dentry *dentry); | |
1402 | int (*inode_symlink)(struct inode *dir, struct dentry *dentry, | |
1403 | const char *old_name); | |
1404 | int (*inode_mkdir)(struct inode *dir, struct dentry *dentry, | |
1405 | umode_t mode); | |
1406 | int (*inode_rmdir)(struct inode *dir, struct dentry *dentry); | |
1407 | int (*inode_mknod)(struct inode *dir, struct dentry *dentry, | |
1408 | umode_t mode, dev_t dev); | |
1409 | int (*inode_rename)(struct inode *old_dir, struct dentry *old_dentry, | |
1410 | struct inode *new_dir, | |
1411 | struct dentry *new_dentry); | |
1412 | int (*inode_readlink)(struct dentry *dentry); | |
e22619a2 LT |
1413 | int (*inode_follow_link)(struct dentry *dentry, struct inode *inode, |
1414 | bool rcu); | |
3c4ed7bd CS |
1415 | int (*inode_permission)(struct inode *inode, int mask); |
1416 | int (*inode_setattr)(struct dentry *dentry, struct iattr *attr); | |
1417 | int (*inode_getattr)(const struct path *path); | |
1418 | int (*inode_setxattr)(struct dentry *dentry, const char *name, | |
1419 | const void *value, size_t size, int flags); | |
1420 | void (*inode_post_setxattr)(struct dentry *dentry, const char *name, | |
1421 | const void *value, size_t size, | |
1422 | int flags); | |
1423 | int (*inode_getxattr)(struct dentry *dentry, const char *name); | |
1424 | int (*inode_listxattr)(struct dentry *dentry); | |
1425 | int (*inode_removexattr)(struct dentry *dentry, const char *name); | |
1426 | int (*inode_need_killpriv)(struct dentry *dentry); | |
1427 | int (*inode_killpriv)(struct dentry *dentry); | |
ea861dfd | 1428 | int (*inode_getsecurity)(struct inode *inode, const char *name, |
3c4ed7bd CS |
1429 | void **buffer, bool alloc); |
1430 | int (*inode_setsecurity)(struct inode *inode, const char *name, | |
1431 | const void *value, size_t size, | |
1432 | int flags); | |
1433 | int (*inode_listsecurity)(struct inode *inode, char *buffer, | |
1434 | size_t buffer_size); | |
d6335d77 | 1435 | void (*inode_getsecid)(struct inode *inode, u32 *secid); |
3c4ed7bd CS |
1436 | |
1437 | int (*file_permission)(struct file *file, int mask); | |
1438 | int (*file_alloc_security)(struct file *file); | |
1439 | void (*file_free_security)(struct file *file); | |
1440 | int (*file_ioctl)(struct file *file, unsigned int cmd, | |
1441 | unsigned long arg); | |
1442 | int (*mmap_addr)(unsigned long addr); | |
1443 | int (*mmap_file)(struct file *file, unsigned long reqprot, | |
1444 | unsigned long prot, unsigned long flags); | |
1445 | int (*file_mprotect)(struct vm_area_struct *vma, unsigned long reqprot, | |
1446 | unsigned long prot); | |
1447 | int (*file_lock)(struct file *file, unsigned int cmd); | |
1448 | int (*file_fcntl)(struct file *file, unsigned int cmd, | |
1449 | unsigned long arg); | |
1450 | void (*file_set_fowner)(struct file *file); | |
1451 | int (*file_send_sigiotask)(struct task_struct *tsk, | |
1452 | struct fown_struct *fown, int sig); | |
1453 | int (*file_receive)(struct file *file); | |
1454 | int (*file_open)(struct file *file, const struct cred *cred); | |
1455 | ||
1456 | int (*task_create)(unsigned long clone_flags); | |
1457 | void (*task_free)(struct task_struct *task); | |
1458 | int (*cred_alloc_blank)(struct cred *cred, gfp_t gfp); | |
1459 | void (*cred_free)(struct cred *cred); | |
1460 | int (*cred_prepare)(struct cred *new, const struct cred *old, | |
1461 | gfp_t gfp); | |
1462 | void (*cred_transfer)(struct cred *new, const struct cred *old); | |
1463 | int (*kernel_act_as)(struct cred *new, u32 secid); | |
1464 | int (*kernel_create_files_as)(struct cred *new, struct inode *inode); | |
1465 | int (*kernel_fw_from_file)(struct file *file, char *buf, size_t size); | |
1466 | int (*kernel_module_request)(char *kmod_name); | |
1467 | int (*kernel_module_from_file)(struct file *file); | |
bc8ca5b9 MZ |
1468 | int (*kernel_post_read_file)(struct file *file, char *buf, loff_t size, |
1469 | enum kernel_read_file_id id); | |
3c4ed7bd CS |
1470 | int (*task_fix_setuid)(struct cred *new, const struct cred *old, |
1471 | int flags); | |
1472 | int (*task_setpgid)(struct task_struct *p, pid_t pgid); | |
1473 | int (*task_getpgid)(struct task_struct *p); | |
1474 | int (*task_getsid)(struct task_struct *p); | |
1475 | void (*task_getsecid)(struct task_struct *p, u32 *secid); | |
1476 | int (*task_setnice)(struct task_struct *p, int nice); | |
1477 | int (*task_setioprio)(struct task_struct *p, int ioprio); | |
1478 | int (*task_getioprio)(struct task_struct *p); | |
1479 | int (*task_setrlimit)(struct task_struct *p, unsigned int resource, | |
1480 | struct rlimit *new_rlim); | |
1481 | int (*task_setscheduler)(struct task_struct *p); | |
1482 | int (*task_getscheduler)(struct task_struct *p); | |
1483 | int (*task_movememory)(struct task_struct *p); | |
1484 | int (*task_kill)(struct task_struct *p, struct siginfo *info, | |
1485 | int sig, u32 secid); | |
1486 | int (*task_wait)(struct task_struct *p); | |
1487 | int (*task_prctl)(int option, unsigned long arg2, unsigned long arg3, | |
1488 | unsigned long arg4, unsigned long arg5); | |
1489 | void (*task_to_inode)(struct task_struct *p, struct inode *inode); | |
1490 | ||
1491 | int (*ipc_permission)(struct kern_ipc_perm *ipcp, short flag); | |
1492 | void (*ipc_getsecid)(struct kern_ipc_perm *ipcp, u32 *secid); | |
1493 | ||
1494 | int (*msg_msg_alloc_security)(struct msg_msg *msg); | |
1495 | void (*msg_msg_free_security)(struct msg_msg *msg); | |
1496 | ||
1497 | int (*msg_queue_alloc_security)(struct msg_queue *msq); | |
1498 | void (*msg_queue_free_security)(struct msg_queue *msq); | |
1499 | int (*msg_queue_associate)(struct msg_queue *msq, int msqflg); | |
1500 | int (*msg_queue_msgctl)(struct msg_queue *msq, int cmd); | |
1501 | int (*msg_queue_msgsnd)(struct msg_queue *msq, struct msg_msg *msg, | |
1502 | int msqflg); | |
1503 | int (*msg_queue_msgrcv)(struct msg_queue *msq, struct msg_msg *msg, | |
1504 | struct task_struct *target, long type, | |
1505 | int mode); | |
1506 | ||
1507 | int (*shm_alloc_security)(struct shmid_kernel *shp); | |
1508 | void (*shm_free_security)(struct shmid_kernel *shp); | |
1509 | int (*shm_associate)(struct shmid_kernel *shp, int shmflg); | |
1510 | int (*shm_shmctl)(struct shmid_kernel *shp, int cmd); | |
1511 | int (*shm_shmat)(struct shmid_kernel *shp, char __user *shmaddr, | |
1512 | int shmflg); | |
1513 | ||
1514 | int (*sem_alloc_security)(struct sem_array *sma); | |
1515 | void (*sem_free_security)(struct sem_array *sma); | |
1516 | int (*sem_associate)(struct sem_array *sma, int semflg); | |
1517 | int (*sem_semctl)(struct sem_array *sma, int cmd); | |
1518 | int (*sem_semop)(struct sem_array *sma, struct sembuf *sops, | |
1519 | unsigned nsops, int alter); | |
1520 | ||
1521 | int (*netlink_send)(struct sock *sk, struct sk_buff *skb); | |
1522 | ||
1523 | void (*d_instantiate)(struct dentry *dentry, struct inode *inode); | |
1524 | ||
1525 | int (*getprocattr)(struct task_struct *p, char *name, char **value); | |
1526 | int (*setprocattr)(struct task_struct *p, char *name, void *value, | |
1527 | size_t size); | |
1528 | int (*ismaclabel)(const char *name); | |
1529 | int (*secid_to_secctx)(u32 secid, char **secdata, u32 *seclen); | |
1530 | int (*secctx_to_secid)(const char *secdata, u32 seclen, u32 *secid); | |
1531 | void (*release_secctx)(char *secdata, u32 seclen); | |
1532 | ||
6f3be9f5 | 1533 | void (*inode_invalidate_secctx)(struct inode *inode); |
3c4ed7bd CS |
1534 | int (*inode_notifysecctx)(struct inode *inode, void *ctx, u32 ctxlen); |
1535 | int (*inode_setsecctx)(struct dentry *dentry, void *ctx, u32 ctxlen); | |
1536 | int (*inode_getsecctx)(struct inode *inode, void **ctx, u32 *ctxlen); | |
1537 | ||
1538 | #ifdef CONFIG_SECURITY_NETWORK | |
1539 | int (*unix_stream_connect)(struct sock *sock, struct sock *other, | |
1540 | struct sock *newsk); | |
1541 | int (*unix_may_send)(struct socket *sock, struct socket *other); | |
1542 | ||
1543 | int (*socket_create)(int family, int type, int protocol, int kern); | |
1544 | int (*socket_post_create)(struct socket *sock, int family, int type, | |
1545 | int protocol, int kern); | |
1546 | int (*socket_bind)(struct socket *sock, struct sockaddr *address, | |
1547 | int addrlen); | |
1548 | int (*socket_connect)(struct socket *sock, struct sockaddr *address, | |
1549 | int addrlen); | |
1550 | int (*socket_listen)(struct socket *sock, int backlog); | |
1551 | int (*socket_accept)(struct socket *sock, struct socket *newsock); | |
1552 | int (*socket_sendmsg)(struct socket *sock, struct msghdr *msg, | |
1553 | int size); | |
1554 | int (*socket_recvmsg)(struct socket *sock, struct msghdr *msg, | |
1555 | int size, int flags); | |
1556 | int (*socket_getsockname)(struct socket *sock); | |
1557 | int (*socket_getpeername)(struct socket *sock); | |
1558 | int (*socket_getsockopt)(struct socket *sock, int level, int optname); | |
1559 | int (*socket_setsockopt)(struct socket *sock, int level, int optname); | |
1560 | int (*socket_shutdown)(struct socket *sock, int how); | |
1561 | int (*socket_sock_rcv_skb)(struct sock *sk, struct sk_buff *skb); | |
1562 | int (*socket_getpeersec_stream)(struct socket *sock, | |
1563 | char __user *optval, | |
1564 | int __user *optlen, unsigned len); | |
1565 | int (*socket_getpeersec_dgram)(struct socket *sock, | |
1566 | struct sk_buff *skb, u32 *secid); | |
1567 | int (*sk_alloc_security)(struct sock *sk, int family, gfp_t priority); | |
1568 | void (*sk_free_security)(struct sock *sk); | |
1569 | void (*sk_clone_security)(const struct sock *sk, struct sock *newsk); | |
1570 | void (*sk_getsecid)(struct sock *sk, u32 *secid); | |
1571 | void (*sock_graft)(struct sock *sk, struct socket *parent); | |
1572 | int (*inet_conn_request)(struct sock *sk, struct sk_buff *skb, | |
1573 | struct request_sock *req); | |
1574 | void (*inet_csk_clone)(struct sock *newsk, | |
1575 | const struct request_sock *req); | |
1576 | void (*inet_conn_established)(struct sock *sk, struct sk_buff *skb); | |
1577 | int (*secmark_relabel_packet)(u32 secid); | |
1578 | void (*secmark_refcount_inc)(void); | |
1579 | void (*secmark_refcount_dec)(void); | |
1580 | void (*req_classify_flow)(const struct request_sock *req, | |
1581 | struct flowi *fl); | |
1582 | int (*tun_dev_alloc_security)(void **security); | |
1583 | void (*tun_dev_free_security)(void *security); | |
1584 | int (*tun_dev_create)(void); | |
1585 | int (*tun_dev_attach_queue)(void *security); | |
1586 | int (*tun_dev_attach)(struct sock *sk, void *security); | |
1587 | int (*tun_dev_open)(void *security); | |
1588 | #endif /* CONFIG_SECURITY_NETWORK */ | |
1589 | ||
1590 | #ifdef CONFIG_SECURITY_NETWORK_XFRM | |
1591 | int (*xfrm_policy_alloc_security)(struct xfrm_sec_ctx **ctxp, | |
1592 | struct xfrm_user_sec_ctx *sec_ctx, | |
1593 | gfp_t gfp); | |
1594 | int (*xfrm_policy_clone_security)(struct xfrm_sec_ctx *old_ctx, | |
1595 | struct xfrm_sec_ctx **new_ctx); | |
1596 | void (*xfrm_policy_free_security)(struct xfrm_sec_ctx *ctx); | |
1597 | int (*xfrm_policy_delete_security)(struct xfrm_sec_ctx *ctx); | |
1598 | int (*xfrm_state_alloc)(struct xfrm_state *x, | |
1599 | struct xfrm_user_sec_ctx *sec_ctx); | |
1600 | int (*xfrm_state_alloc_acquire)(struct xfrm_state *x, | |
1601 | struct xfrm_sec_ctx *polsec, | |
1602 | u32 secid); | |
1603 | void (*xfrm_state_free_security)(struct xfrm_state *x); | |
1604 | int (*xfrm_state_delete_security)(struct xfrm_state *x); | |
1605 | int (*xfrm_policy_lookup)(struct xfrm_sec_ctx *ctx, u32 fl_secid, | |
1606 | u8 dir); | |
1607 | int (*xfrm_state_pol_flow_match)(struct xfrm_state *x, | |
1608 | struct xfrm_policy *xp, | |
1609 | const struct flowi *fl); | |
1610 | int (*xfrm_decode_session)(struct sk_buff *skb, u32 *secid, int ckall); | |
1611 | #endif /* CONFIG_SECURITY_NETWORK_XFRM */ | |
1612 | ||
1613 | /* key management security hooks */ | |
1614 | #ifdef CONFIG_KEYS | |
1615 | int (*key_alloc)(struct key *key, const struct cred *cred, | |
1616 | unsigned long flags); | |
1617 | void (*key_free)(struct key *key); | |
1618 | int (*key_permission)(key_ref_t key_ref, const struct cred *cred, | |
1619 | unsigned perm); | |
1620 | int (*key_getsecurity)(struct key *key, char **_buffer); | |
1621 | #endif /* CONFIG_KEYS */ | |
1622 | ||
1623 | #ifdef CONFIG_AUDIT | |
1624 | int (*audit_rule_init)(u32 field, u32 op, char *rulestr, | |
1625 | void **lsmrule); | |
1626 | int (*audit_rule_known)(struct audit_krule *krule); | |
1627 | int (*audit_rule_match)(u32 secid, u32 field, u32 op, void *lsmrule, | |
1628 | struct audit_context *actx); | |
1629 | void (*audit_rule_free)(void *lsmrule); | |
1630 | #endif /* CONFIG_AUDIT */ | |
1631 | }; | |
1632 | ||
e20b043a CS |
1633 | struct security_hook_heads { |
1634 | struct list_head binder_set_context_mgr; | |
1635 | struct list_head binder_transaction; | |
1636 | struct list_head binder_transfer_binder; | |
1637 | struct list_head binder_transfer_file; | |
1638 | struct list_head ptrace_access_check; | |
1639 | struct list_head ptrace_traceme; | |
1640 | struct list_head capget; | |
1641 | struct list_head capset; | |
1642 | struct list_head capable; | |
1643 | struct list_head quotactl; | |
1644 | struct list_head quota_on; | |
1645 | struct list_head syslog; | |
1646 | struct list_head settime; | |
1647 | struct list_head vm_enough_memory; | |
1648 | struct list_head bprm_set_creds; | |
1649 | struct list_head bprm_check_security; | |
1650 | struct list_head bprm_secureexec; | |
1651 | struct list_head bprm_committing_creds; | |
1652 | struct list_head bprm_committed_creds; | |
1653 | struct list_head sb_alloc_security; | |
1654 | struct list_head sb_free_security; | |
1655 | struct list_head sb_copy_data; | |
1656 | struct list_head sb_remount; | |
1657 | struct list_head sb_kern_mount; | |
1658 | struct list_head sb_show_options; | |
1659 | struct list_head sb_statfs; | |
1660 | struct list_head sb_mount; | |
1661 | struct list_head sb_umount; | |
1662 | struct list_head sb_pivotroot; | |
1663 | struct list_head sb_set_mnt_opts; | |
1664 | struct list_head sb_clone_mnt_opts; | |
1665 | struct list_head sb_parse_opts_str; | |
1666 | struct list_head dentry_init_security; | |
1667 | #ifdef CONFIG_SECURITY_PATH | |
1668 | struct list_head path_unlink; | |
1669 | struct list_head path_mkdir; | |
1670 | struct list_head path_rmdir; | |
1671 | struct list_head path_mknod; | |
1672 | struct list_head path_truncate; | |
1673 | struct list_head path_symlink; | |
1674 | struct list_head path_link; | |
1675 | struct list_head path_rename; | |
1676 | struct list_head path_chmod; | |
1677 | struct list_head path_chown; | |
1678 | struct list_head path_chroot; | |
1679 | #endif | |
1680 | struct list_head inode_alloc_security; | |
1681 | struct list_head inode_free_security; | |
1682 | struct list_head inode_init_security; | |
1683 | struct list_head inode_create; | |
1684 | struct list_head inode_link; | |
1685 | struct list_head inode_unlink; | |
1686 | struct list_head inode_symlink; | |
1687 | struct list_head inode_mkdir; | |
1688 | struct list_head inode_rmdir; | |
1689 | struct list_head inode_mknod; | |
1690 | struct list_head inode_rename; | |
1691 | struct list_head inode_readlink; | |
1692 | struct list_head inode_follow_link; | |
1693 | struct list_head inode_permission; | |
1694 | struct list_head inode_setattr; | |
1695 | struct list_head inode_getattr; | |
1696 | struct list_head inode_setxattr; | |
1697 | struct list_head inode_post_setxattr; | |
1698 | struct list_head inode_getxattr; | |
1699 | struct list_head inode_listxattr; | |
1700 | struct list_head inode_removexattr; | |
1701 | struct list_head inode_need_killpriv; | |
1702 | struct list_head inode_killpriv; | |
1703 | struct list_head inode_getsecurity; | |
1704 | struct list_head inode_setsecurity; | |
1705 | struct list_head inode_listsecurity; | |
1706 | struct list_head inode_getsecid; | |
1707 | struct list_head file_permission; | |
1708 | struct list_head file_alloc_security; | |
1709 | struct list_head file_free_security; | |
1710 | struct list_head file_ioctl; | |
1711 | struct list_head mmap_addr; | |
1712 | struct list_head mmap_file; | |
1713 | struct list_head file_mprotect; | |
1714 | struct list_head file_lock; | |
1715 | struct list_head file_fcntl; | |
1716 | struct list_head file_set_fowner; | |
1717 | struct list_head file_send_sigiotask; | |
1718 | struct list_head file_receive; | |
1719 | struct list_head file_open; | |
1720 | struct list_head task_create; | |
1721 | struct list_head task_free; | |
1722 | struct list_head cred_alloc_blank; | |
1723 | struct list_head cred_free; | |
1724 | struct list_head cred_prepare; | |
1725 | struct list_head cred_transfer; | |
1726 | struct list_head kernel_act_as; | |
1727 | struct list_head kernel_create_files_as; | |
1728 | struct list_head kernel_fw_from_file; | |
b44a7dfc | 1729 | struct list_head kernel_post_read_file; |
e20b043a CS |
1730 | struct list_head kernel_module_request; |
1731 | struct list_head kernel_module_from_file; | |
1732 | struct list_head task_fix_setuid; | |
1733 | struct list_head task_setpgid; | |
1734 | struct list_head task_getpgid; | |
1735 | struct list_head task_getsid; | |
1736 | struct list_head task_getsecid; | |
1737 | struct list_head task_setnice; | |
1738 | struct list_head task_setioprio; | |
1739 | struct list_head task_getioprio; | |
1740 | struct list_head task_setrlimit; | |
1741 | struct list_head task_setscheduler; | |
1742 | struct list_head task_getscheduler; | |
1743 | struct list_head task_movememory; | |
1744 | struct list_head task_kill; | |
1745 | struct list_head task_wait; | |
1746 | struct list_head task_prctl; | |
1747 | struct list_head task_to_inode; | |
1748 | struct list_head ipc_permission; | |
1749 | struct list_head ipc_getsecid; | |
1750 | struct list_head msg_msg_alloc_security; | |
1751 | struct list_head msg_msg_free_security; | |
1752 | struct list_head msg_queue_alloc_security; | |
1753 | struct list_head msg_queue_free_security; | |
1754 | struct list_head msg_queue_associate; | |
1755 | struct list_head msg_queue_msgctl; | |
1756 | struct list_head msg_queue_msgsnd; | |
1757 | struct list_head msg_queue_msgrcv; | |
1758 | struct list_head shm_alloc_security; | |
1759 | struct list_head shm_free_security; | |
1760 | struct list_head shm_associate; | |
1761 | struct list_head shm_shmctl; | |
1762 | struct list_head shm_shmat; | |
1763 | struct list_head sem_alloc_security; | |
1764 | struct list_head sem_free_security; | |
1765 | struct list_head sem_associate; | |
1766 | struct list_head sem_semctl; | |
1767 | struct list_head sem_semop; | |
1768 | struct list_head netlink_send; | |
1769 | struct list_head d_instantiate; | |
1770 | struct list_head getprocattr; | |
1771 | struct list_head setprocattr; | |
1772 | struct list_head ismaclabel; | |
1773 | struct list_head secid_to_secctx; | |
1774 | struct list_head secctx_to_secid; | |
1775 | struct list_head release_secctx; | |
6f3be9f5 | 1776 | struct list_head inode_invalidate_secctx; |
e20b043a CS |
1777 | struct list_head inode_notifysecctx; |
1778 | struct list_head inode_setsecctx; | |
1779 | struct list_head inode_getsecctx; | |
1780 | #ifdef CONFIG_SECURITY_NETWORK | |
1781 | struct list_head unix_stream_connect; | |
1782 | struct list_head unix_may_send; | |
1783 | struct list_head socket_create; | |
1784 | struct list_head socket_post_create; | |
1785 | struct list_head socket_bind; | |
1786 | struct list_head socket_connect; | |
1787 | struct list_head socket_listen; | |
1788 | struct list_head socket_accept; | |
1789 | struct list_head socket_sendmsg; | |
1790 | struct list_head socket_recvmsg; | |
1791 | struct list_head socket_getsockname; | |
1792 | struct list_head socket_getpeername; | |
1793 | struct list_head socket_getsockopt; | |
1794 | struct list_head socket_setsockopt; | |
1795 | struct list_head socket_shutdown; | |
1796 | struct list_head socket_sock_rcv_skb; | |
1797 | struct list_head socket_getpeersec_stream; | |
1798 | struct list_head socket_getpeersec_dgram; | |
1799 | struct list_head sk_alloc_security; | |
1800 | struct list_head sk_free_security; | |
1801 | struct list_head sk_clone_security; | |
1802 | struct list_head sk_getsecid; | |
1803 | struct list_head sock_graft; | |
1804 | struct list_head inet_conn_request; | |
1805 | struct list_head inet_csk_clone; | |
1806 | struct list_head inet_conn_established; | |
1807 | struct list_head secmark_relabel_packet; | |
1808 | struct list_head secmark_refcount_inc; | |
1809 | struct list_head secmark_refcount_dec; | |
1810 | struct list_head req_classify_flow; | |
1811 | struct list_head tun_dev_alloc_security; | |
1812 | struct list_head tun_dev_free_security; | |
1813 | struct list_head tun_dev_create; | |
1814 | struct list_head tun_dev_attach_queue; | |
1815 | struct list_head tun_dev_attach; | |
1816 | struct list_head tun_dev_open; | |
1817 | struct list_head skb_owned_by; | |
1818 | #endif /* CONFIG_SECURITY_NETWORK */ | |
1819 | #ifdef CONFIG_SECURITY_NETWORK_XFRM | |
1820 | struct list_head xfrm_policy_alloc_security; | |
1821 | struct list_head xfrm_policy_clone_security; | |
1822 | struct list_head xfrm_policy_free_security; | |
1823 | struct list_head xfrm_policy_delete_security; | |
1824 | struct list_head xfrm_state_alloc; | |
1825 | struct list_head xfrm_state_alloc_acquire; | |
1826 | struct list_head xfrm_state_free_security; | |
1827 | struct list_head xfrm_state_delete_security; | |
1828 | struct list_head xfrm_policy_lookup; | |
1829 | struct list_head xfrm_state_pol_flow_match; | |
1830 | struct list_head xfrm_decode_session; | |
1831 | #endif /* CONFIG_SECURITY_NETWORK_XFRM */ | |
1832 | #ifdef CONFIG_KEYS | |
1833 | struct list_head key_alloc; | |
1834 | struct list_head key_free; | |
1835 | struct list_head key_permission; | |
1836 | struct list_head key_getsecurity; | |
1837 | #endif /* CONFIG_KEYS */ | |
1838 | #ifdef CONFIG_AUDIT | |
1839 | struct list_head audit_rule_init; | |
1840 | struct list_head audit_rule_known; | |
1841 | struct list_head audit_rule_match; | |
1842 | struct list_head audit_rule_free; | |
1843 | #endif /* CONFIG_AUDIT */ | |
1844 | }; | |
1845 | ||
b1d9e6b0 CS |
1846 | /* |
1847 | * Security module hook list structure. | |
1848 | * For use with generic list macros for common operations. | |
1849 | */ | |
1850 | struct security_hook_list { | |
1851 | struct list_head list; | |
1852 | struct list_head *head; | |
1853 | union security_list_options hook; | |
1854 | }; | |
1855 | ||
e20b043a CS |
1856 | /* |
1857 | * Initializing a security_hook_list structure takes | |
1858 | * up a lot of space in a source file. This macro takes | |
1859 | * care of the common case and reduces the amount of | |
1860 | * text involved. | |
e20b043a | 1861 | */ |
b1d9e6b0 CS |
1862 | #define LSM_HOOK_INIT(HEAD, HOOK) \ |
1863 | { .head = &security_hook_heads.HEAD, .hook = { .HEAD = HOOK } } | |
1864 | ||
1865 | extern struct security_hook_heads security_hook_heads; | |
1866 | ||
1867 | static inline void security_add_hooks(struct security_hook_list *hooks, | |
1868 | int count) | |
1869 | { | |
1870 | int i; | |
e20b043a | 1871 | |
b1d9e6b0 CS |
1872 | for (i = 0; i < count; i++) |
1873 | list_add_tail_rcu(&hooks[i].list, hooks[i].head); | |
1874 | } | |
3c4ed7bd | 1875 | |
b1d9e6b0 CS |
1876 | #ifdef CONFIG_SECURITY_SELINUX_DISABLE |
1877 | /* | |
1878 | * Assuring the safety of deleting a security module is up to | |
1879 | * the security module involved. This may entail ordering the | |
1880 | * module's hook list in a particular way, refusing to disable | |
1881 | * the module once a policy is loaded or any number of other | |
1882 | * actions better imagined than described. | |
1883 | * | |
1884 | * The name of the configuration option reflects the only module | |
1885 | * that currently uses the mechanism. Any developer who thinks | |
1886 | * disabling their module is a good idea needs to be at least as | |
1887 | * careful as the SELinux team. | |
1888 | */ | |
1889 | static inline void security_delete_hooks(struct security_hook_list *hooks, | |
1890 | int count) | |
1891 | { | |
1892 | int i; | |
1893 | ||
1894 | for (i = 0; i < count; i++) | |
1895 | list_del_rcu(&hooks[i].list); | |
1896 | } | |
1897 | #endif /* CONFIG_SECURITY_SELINUX_DISABLE */ | |
1898 | ||
1899 | extern int __init security_module_enable(const char *module); | |
1900 | extern void __init capability_add_hooks(void); | |
730daa16 KC |
1901 | #ifdef CONFIG_SECURITY_YAMA |
1902 | extern void __init yama_add_hooks(void); | |
1903 | #else | |
1904 | static inline void __init yama_add_hooks(void) { } | |
b1d9e6b0 | 1905 | #endif |
3c4ed7bd CS |
1906 | |
1907 | #endif /* ! __LINUX_LSM_HOOKS_H */ |