| blob | b92f2d31f2ee6e3836310163b782e01879e1ceb6 |
1 /*
2 * Linux Security plug
3 *
4 * Copyright (C) 2001 WireX Communications, Inc <chris@wirex.com>
5 * Copyright (C) 2001 Greg Kroah-Hartman <greg@kroah.com>
6 * Copyright (C) 2001 Networks Associates Technology, Inc <ssmalley@nai.com>
7 * Copyright (C) 2001 James Morris <jmorris@intercode.com.au>
8 * Copyright (C) 2001 Silicon Graphics, Inc. (Trust Technology Group)
9 *
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License as published by
12 * the Free Software Foundation; either version 2 of the License, or
13 * (at your option) any later version.
14 *
15 * Due to this file being licensed under the GPL there is controversy over
16 * whether this permits you to write a module that #includes this file
17 * without placing your module under the GPL. Please consult a lawyer for
18 * advice before doing this.
19 *
20 */
22 #ifndef __LINUX_SECURITY_H
23 #define __LINUX_SECURITY_H
25 #include <linux/fs.h>
26 #include <linux/binfmts.h>
27 #include <linux/signal.h>
28 #include <linux/resource.h>
29 #include <linux/sem.h>
30 #include <linux/shm.h>
31 #include <linux/msg.h>
32 #include <linux/sched.h>
33 #include <linux/key.h>
34 #include <linux/xfrm.h>
35 #include <net/flow.h>
38 /* only a char in selinux superblock security struct flags */
39 #define FSCONTEXT_MNT 0x01
40 #define CONTEXT_MNT 0x02
41 #define ROOTCONTEXT_MNT 0x04
42 #define DEFCONTEXT_MNT 0x08
44 =======
50 /*
51 * These functions are in security/capability.c and are used
52 * as the default capabilities functions
53 */
57 extern int cap_capget (struct task_struct *target, kernel_cap_t *effective, kernel_cap_t *inheritable, kernel_cap_t *permitted);
58 extern int cap_capset_check (struct task_struct *target, kernel_cap_t *effective, kernel_cap_t *inheritable, kernel_cap_t *permitted);
59 extern void cap_capset_set (struct task_struct *target, kernel_cap_t *effective, kernel_cap_t *inheritable, kernel_cap_t *permitted);
63 extern int cap_inode_setxattr(struct dentry *dentry, char *name, void *value, size_t size, int flags);
92 /*
93 * Values used in the task_security_ops calls
94 */
95 /* setuid or setgid, id0 == uid or gid */
96 #define LSM_SETID_ID 1
98 /* setreuid or setregid, id0 == real, id1 == eff */
99 #define LSM_SETID_RE 2
101 /* setresuid or setresgid, id0 == real, id1 == eff, uid2 == saved */
102 #define LSM_SETID_RES 4
104 /* setfsuid or setfsgid, id0 == fsuid or fsgid */
105 #define LSM_SETID_FS 8
107 /* forward declares to avoid warnings */
113 /* bprm_apply_creds unsafe reasons */
114 #define LSM_UNSAFE_SHARE 1
115 #define LSM_UNSAFE_PTRACE 2
116 #define LSM_UNSAFE_PTRACE_CAP 4
118 #ifdef CONFIG_SECURITY
121 =======
126 };
129 {
133 }
136 {
146 }
149 /**
150 * struct security_operations - main security structure
151 *
152 * Security hooks for program execution operations.
153 *
154 * @bprm_alloc_security:
155 * Allocate and attach a security structure to the @bprm->security field.
156 * The security field is initialized to NULL when the bprm structure is
157 * allocated.
158 * @bprm contains the linux_binprm structure to be modified.
159 * Return 0 if operation was successful.
160 * @bprm_free_security:
161 * @bprm contains the linux_binprm structure to be modified.
162 * Deallocate and clear the @bprm->security field.
163 * @bprm_apply_creds:
164 * Compute and set the security attributes of a process being transformed
165 * by an execve operation based on the old attributes (current->security)
166 * and the information saved in @bprm->security by the set_security hook.
167 * Since this hook function (and its caller) are void, this hook can not
168 * return an error. However, it can leave the security attributes of the
169 * process unchanged if an access failure occurs at this point.
170 * bprm_apply_creds is called under task_lock. @unsafe indicates various
171 * reasons why it may be unsafe to change security state.
172 * @bprm contains the linux_binprm structure.
173 * @bprm_post_apply_creds:
174 * Runs after bprm_apply_creds with the task_lock dropped, so that
175 * functions which cannot be called safely under the task_lock can
176 * be used. This hook is a good place to perform state changes on
177 * the process such as closing open file descriptors to which access
178 * is no longer granted if the attributes were changed.
179 * Note that a security module might need to save state between
180 * bprm_apply_creds and bprm_post_apply_creds to store the decision
181 * on whether the process may proceed.
182 * @bprm contains the linux_binprm structure.
183 * @bprm_set_security:
184 * Save security information in the bprm->security field, typically based
185 * on information about the bprm->file, for later use by the apply_creds
186 * hook. This hook may also optionally check permissions (e.g. for
187 * transitions between security domains).
188 * This hook may be called multiple times during a single execve, e.g. for
189 * interpreters. The hook can tell whether it has already been called by
190 * checking to see if @bprm->security is non-NULL. If so, then the hook
191 * may decide either to retain the security information saved earlier or
192 * to replace it.
193 * @bprm contains the linux_binprm structure.
194 * Return 0 if the hook is successful and permission is granted.
195 * @bprm_check_security:
196 * This hook mediates the point when a search for a binary handler will
197 * begin. It allows a check the @bprm->security value which is set in
198 * the preceding set_security call. The primary difference from
199 * set_security is that the argv list and envp list are reliably
200 * available in @bprm. This hook may be called multiple times
201 * during a single execve; and in each pass set_security is called
202 * first.
203 * @bprm contains the linux_binprm structure.
204 * Return 0 if the hook is successful and permission is granted.
205 * @bprm_secureexec:
206 * Return a boolean value (0 or 1) indicating whether a "secure exec"
207 * is required. The flag is passed in the auxiliary table
208 * on the initial stack to the ELF interpreter to indicate whether libc
209 * should enable secure mode.
210 * @bprm contains the linux_binprm structure.
211 *
212 * Security hooks for filesystem operations.
213 *
214 * @sb_alloc_security:
215 * Allocate and attach a security structure to the sb->s_security field.
216 * The s_security field is initialized to NULL when the structure is
217 * allocated.
218 * @sb contains the super_block structure to be modified.
219 * Return 0 if operation was successful.
220 * @sb_free_security:
221 * Deallocate and clear the sb->s_security field.
222 * @sb contains the super_block structure to be modified.
223 * @sb_statfs:
224 * Check permission before obtaining filesystem statistics for the @mnt
225 * mountpoint.
226 * @dentry is a handle on the superblock for the filesystem.
227 * Return 0 if permission is granted.
228 * @sb_mount:
229 * Check permission before an object specified by @dev_name is mounted on
230 * the mount point named by @nd. For an ordinary mount, @dev_name
231 * identifies a device if the file system type requires a device. For a
232 * remount (@flags & MS_REMOUNT), @dev_name is irrelevant. For a
233 * loopback/bind mount (@flags & MS_BIND), @dev_name identifies the
234 * pathname of the object being mounted.
235 * @dev_name contains the name for object being mounted.
236 * @nd contains the nameidata structure for mount point object.
237 * @type contains the filesystem type.
238 * @flags contains the mount flags.
239 * @data contains the filesystem-specific data.
240 * Return 0 if permission is granted.
241 * @sb_copy_data:
242 * Allow mount option data to be copied prior to parsing by the filesystem,
243 * so that the security module can extract security-specific mount
244 * options cleanly (a filesystem may modify the data e.g. with strsep()).
245 * This also allows the original mount data to be stripped of security-
246 * specific options to avoid having to make filesystems aware of them.
247 * @type the type of filesystem being mounted.
248 * @orig the original mount data copied from userspace.
249 * @copy copied data which will be passed to the security module.
250 * Returns 0 if the copy was successful.
251 * @sb_check_sb:
252 * Check permission before the device with superblock @mnt->sb is mounted
253 * on the mount point named by @nd.
254 * @mnt contains the vfsmount for device being mounted.
255 * @nd contains the nameidata object for the mount point.
256 * Return 0 if permission is granted.
257 * @sb_umount:
258 * Check permission before the @mnt file system is unmounted.
259 * @mnt contains the mounted file system.
260 * @flags contains the unmount flags, e.g. MNT_FORCE.
261 * Return 0 if permission is granted.
262 * @sb_umount_close:
263 * Close any files in the @mnt mounted filesystem that are held open by
264 * the security module. This hook is called during an umount operation
265 * prior to checking whether the filesystem is still busy.
266 * @mnt contains the mounted filesystem.
267 * @sb_umount_busy:
268 * Handle a failed umount of the @mnt mounted filesystem, e.g. re-opening
269 * any files that were closed by umount_close. This hook is called during
270 * an umount operation if the umount fails after a call to the
271 * umount_close hook.
272 * @mnt contains the mounted filesystem.
273 * @sb_post_remount:
274 * Update the security module's state when a filesystem is remounted.
275 * This hook is only called if the remount was successful.
276 * @mnt contains the mounted file system.
277 * @flags contains the new filesystem flags.
278 * @data contains the filesystem-specific data.
279 * @sb_post_addmount:
280 * Update the security module's state when a filesystem is mounted.
281 * This hook is called any time a mount is successfully grafetd to
282 * the tree.
283 * @mnt contains the mounted filesystem.
284 * @mountpoint_nd contains the nameidata structure for the mount point.
285 * @sb_pivotroot:
286 * Check permission before pivoting the root filesystem.
287 * @old_nd contains the nameidata structure for the new location of the current root (put_old).
288 * @new_nd contains the nameidata structure for the new root (new_root).
289 * Return 0 if permission is granted.
290 * @sb_post_pivotroot:
291 * Update module state after a successful pivot.
292 * @old_nd contains the nameidata structure for the old root.
293 * @new_nd contains the nameidata structure for the new root.
294 * @sb_get_mnt_opts:
295 * Get the security relevant mount options used for a superblock
296 * @sb the superblock to get security mount options from
297 <<<<<<< HEAD:include/linux/security.h
298 * @mount_options array for pointers to mount options
299 * @mount_flags array of ints specifying what each mount options is
300 * @num_opts number of options in the arrays
301 =======
302 * @opts binary data structure containing all lsm mount data
303 >>>>>>> 264e3e889d86e552b4191d69bb60f4f3b383135a:include/linux/security.h
304 * @sb_set_mnt_opts:
305 * Set the security relevant mount options used for a superblock
306 * @sb the superblock to set security mount options for
307 <<<<<<< HEAD:include/linux/security.h
308 * @mount_options array for pointers to mount options
309 * @mount_flags array of ints specifying what each mount options is
310 * @num_opts number of options in the arrays
311 =======
312 * @opts binary data structure containing all lsm mount data
313 >>>>>>> 264e3e889d86e552b4191d69bb60f4f3b383135a:include/linux/security.h
314 * @sb_clone_mnt_opts:
315 * Copy all security options from a given superblock to another
316 * @oldsb old superblock which contain information to clone
317 * @newsb new superblock which needs filled in
318 <<<<<<< HEAD:include/linux/security.h
319 =======
320 * @sb_parse_opts_str:
321 * Parse a string of security data filling in the opts structure
322 * @options string containing all mount options known by the LSM
323 * @opts binary data structure usable by the LSM
324 >>>>>>> 264e3e889d86e552b4191d69bb60f4f3b383135a:include/linux/security.h
325 *
326 * Security hooks for inode operations.
327 *
328 * @inode_alloc_security:
329 * Allocate and attach a security structure to @inode->i_security. The
330 * i_security field is initialized to NULL when the inode structure is
331 * allocated.
332 * @inode contains the inode structure.
333 * Return 0 if operation was successful.
334 * @inode_free_security:
335 * @inode contains the inode structure.
336 * Deallocate the inode security structure and set @inode->i_security to
337 * NULL.
338 * @inode_init_security:
339 * Obtain the security attribute name suffix and value to set on a newly
340 * created inode and set up the incore security field for the new inode.
341 * This hook is called by the fs code as part of the inode creation
342 * transaction and provides for atomic labeling of the inode, unlike
343 * the post_create/mkdir/... hooks called by the VFS. The hook function
344 * is expected to allocate the name and value via kmalloc, with the caller
345 * being responsible for calling kfree after using them.
346 * If the security module does not use security attributes or does
347 * not wish to put a security attribute on this particular inode,
348 * then it should return -EOPNOTSUPP to skip this processing.
349 * @inode contains the inode structure of the newly created inode.
350 * @dir contains the inode structure of the parent directory.
351 * @name will be set to the allocated name suffix (e.g. selinux).
352 * @value will be set to the allocated attribute value.
353 * @len will be set to the length of the value.
354 * Returns 0 if @name and @value have been successfully set,
355 * -EOPNOTSUPP if no security attribute is needed, or
356 * -ENOMEM on memory allocation failure.
357 * @inode_create:
358 * Check permission to create a regular file.
359 * @dir contains inode structure of the parent of the new file.
360 * @dentry contains the dentry structure for the file to be created.
361 * @mode contains the file mode of the file to be created.
362 * Return 0 if permission is granted.
363 * @inode_link:
364 * Check permission before creating a new hard link to a file.
365 * @old_dentry contains the dentry structure for an existing link to the file.
366 * @dir contains the inode structure of the parent directory of the new link.
367 * @new_dentry contains the dentry structure for the new link.
368 * Return 0 if permission is granted.
369 * @inode_unlink:
370 * Check the permission to remove a hard link to a file.
371 * @dir contains the inode structure of parent directory of the file.
372 * @dentry contains the dentry structure for file to be unlinked.
373 * Return 0 if permission is granted.
374 * @inode_symlink:
375 * Check the permission to create a symbolic link to a file.
376 * @dir contains the inode structure of parent directory of the symbolic link.
377 * @dentry contains the dentry structure of the symbolic link.
378 * @old_name contains the pathname of file.
379 * Return 0 if permission is granted.
380 * @inode_mkdir:
381 * Check permissions to create a new directory in the existing directory
382 * associated with inode strcture @dir.
383 * @dir containst the inode structure of parent of the directory to be created.
384 * @dentry contains the dentry structure of new directory.
385 * @mode contains the mode of new directory.
386 * Return 0 if permission is granted.
387 * @inode_rmdir:
388 * Check the permission to remove a directory.
389 * @dir contains the inode structure of parent of the directory to be removed.
390 * @dentry contains the dentry structure of directory to be removed.
391 * Return 0 if permission is granted.
392 * @inode_mknod:
393 * Check permissions when creating a special file (or a socket or a fifo
394 * file created via the mknod system call). Note that if mknod operation
395 * is being done for a regular file, then the create hook will be called
396 * and not this hook.
397 * @dir contains the inode structure of parent of the new file.
398 * @dentry contains the dentry structure of the new file.
399 * @mode contains the mode of the new file.
400 * @dev contains the device number.
401 * Return 0 if permission is granted.
402 * @inode_rename:
403 * Check for permission to rename a file or directory.
404 * @old_dir contains the inode structure for parent of the old link.
405 * @old_dentry contains the dentry structure of the old link.
406 * @new_dir contains the inode structure for parent of the new link.
407 * @new_dentry contains the dentry structure of the new link.
408 * Return 0 if permission is granted.
409 * @inode_readlink:
410 * Check the permission to read the symbolic link.
411 * @dentry contains the dentry structure for the file link.
412 * Return 0 if permission is granted.
413 * @inode_follow_link:
414 * Check permission to follow a symbolic link when looking up a pathname.
415 * @dentry contains the dentry structure for the link.
416 * @nd contains the nameidata structure for the parent directory.
417 * Return 0 if permission is granted.
418 * @inode_permission:
419 * Check permission before accessing an inode. This hook is called by the
420 * existing Linux permission function, so a security module can use it to
421 * provide additional checking for existing Linux permission checks.
422 * Notice that this hook is called when a file is opened (as well as many
423 * other operations), whereas the file_security_ops permission hook is
424 * called when the actual read/write operations are performed.
425 * @inode contains the inode structure to check.
426 * @mask contains the permission mask.
427 * @nd contains the nameidata (may be NULL).
428 * Return 0 if permission is granted.
429 * @inode_setattr:
430 * Check permission before setting file attributes. Note that the kernel
431 * call to notify_change is performed from several locations, whenever
432 * file attributes change (such as when a file is truncated, chown/chmod
433 * operations, transferring disk quotas, etc).
434 * @dentry contains the dentry structure for the file.
435 * @attr is the iattr structure containing the new file attributes.
436 * Return 0 if permission is granted.
437 * @inode_getattr:
438 * Check permission before obtaining file attributes.
439 * @mnt is the vfsmount where the dentry was looked up
440 * @dentry contains the dentry structure for the file.
441 * Return 0 if permission is granted.
442 * @inode_delete:
443 * @inode contains the inode structure for deleted inode.
444 * This hook is called when a deleted inode is released (i.e. an inode
445 * with no hard links has its use count drop to zero). A security module
446 * can use this hook to release any persistent label associated with the
447 * inode.
448 * @inode_setxattr:
449 * Check permission before setting the extended attributes
450 * @value identified by @name for @dentry.
451 * Return 0 if permission is granted.
452 * @inode_post_setxattr:
453 * Update inode security field after successful setxattr operation.
454 * @value identified by @name for @dentry.
455 * @inode_getxattr:
456 * Check permission before obtaining the extended attributes
457 * identified by @name for @dentry.
458 * Return 0 if permission is granted.
459 * @inode_listxattr:
460 * Check permission before obtaining the list of extended attribute
461 * names for @dentry.
462 * Return 0 if permission is granted.
463 * @inode_removexattr:
464 * Check permission before removing the extended attribute
465 * identified by @name for @dentry.
466 * Return 0 if permission is granted.
467 * @inode_getsecurity:
468 * Retrieve a copy of the extended attribute representation of the
469 * security label associated with @name for @inode via @buffer. Note that
470 * @name is the remainder of the attribute name after the security prefix
471 * has been removed. @alloc is used to specify of the call should return a
472 * value via the buffer or just the value length Return size of buffer on
473 * success.
474 * @inode_setsecurity:
475 * Set the security label associated with @name for @inode from the
476 * extended attribute value @value. @size indicates the size of the
477 * @value in bytes. @flags may be XATTR_CREATE, XATTR_REPLACE, or 0.
478 * Note that @name is the remainder of the attribute name after the
479 * security. prefix has been removed.
480 * Return 0 on success.
481 * @inode_listsecurity:
482 * Copy the extended attribute names for the security labels
483 * associated with @inode into @buffer. The maximum size of @buffer
484 * is specified by @buffer_size. @buffer may be NULL to request
485 * the size of the buffer required.
486 * Returns number of bytes used/required on success.
487 * @inode_need_killpriv:
488 * Called when an inode has been changed.
489 * @dentry is the dentry being changed.
490 * Return <0 on error to abort the inode change operation.
491 * Return 0 if inode_killpriv does not need to be called.
492 * Return >0 if inode_killpriv does need to be called.
493 * @inode_killpriv:
494 * The setuid bit is being removed. Remove similar security labels.
495 * Called with the dentry->d_inode->i_mutex held.
496 * @dentry is the dentry being changed.
497 * Return 0 on success. If error is returned, then the operation
498 * causing setuid bit removal is failed.
499 *
500 * Security hooks for file operations
501 *
502 * @file_permission:
503 * Check file permissions before accessing an open file. This hook is
504 * called by various operations that read or write files. A security
505 * module can use this hook to perform additional checking on these
506 * operations, e.g. to revalidate permissions on use to support privilege
507 * bracketing or policy changes. Notice that this hook is used when the
508 * actual read/write operations are performed, whereas the
509 * inode_security_ops hook is called when a file is opened (as well as
510 * many other operations).
511 * Caveat: Although this hook can be used to revalidate permissions for
512 * various system call operations that read or write files, it does not
513 * address the revalidation of permissions for memory-mapped files.
514 * Security modules must handle this separately if they need such
515 * revalidation.
516 * @file contains the file structure being accessed.
517 * @mask contains the requested permissions.
518 * Return 0 if permission is granted.
519 * @file_alloc_security:
520 * Allocate and attach a security structure to the file->f_security field.
521 * The security field is initialized to NULL when the structure is first
522 * created.
523 * @file contains the file structure to secure.
524 * Return 0 if the hook is successful and permission is granted.
525 * @file_free_security:
526 * Deallocate and free any security structures stored in file->f_security.
527 * @file contains the file structure being modified.
528 * @file_ioctl:
529 * @file contains the file structure.
530 * @cmd contains the operation to perform.
531 * @arg contains the operational arguments.
532 * Check permission for an ioctl operation on @file. Note that @arg can
533 * sometimes represents a user space pointer; in other cases, it may be a
534 * simple integer value. When @arg represents a user space pointer, it
535 * should never be used by the security module.
536 * Return 0 if permission is granted.
537 * @file_mmap :
538 * Check permissions for a mmap operation. The @file may be NULL, e.g.
539 * if mapping anonymous memory.
540 * @file contains the file structure for file to map (may be NULL).
541 * @reqprot contains the protection requested by the application.
542 * @prot contains the protection that will be applied by the kernel.
543 * @flags contains the operational flags.
544 * Return 0 if permission is granted.
545 * @file_mprotect:
546 * Check permissions before changing memory access permissions.
547 * @vma contains the memory region to modify.
548 * @reqprot contains the protection requested by the application.
549 * @prot contains the protection that will be applied by the kernel.
550 * Return 0 if permission is granted.
551 * @file_lock:
552 * Check permission before performing file locking operations.
553 * Note: this hook mediates both flock and fcntl style locks.
554 * @file contains the file structure.
555 * @cmd contains the posix-translated lock operation to perform
556 * (e.g. F_RDLCK, F_WRLCK).
557 * Return 0 if permission is granted.
558 * @file_fcntl:
559 * Check permission before allowing the file operation specified by @cmd
560 * from being performed on the file @file. Note that @arg can sometimes
561 * represents a user space pointer; in other cases, it may be a simple
562 * integer value. When @arg represents a user space pointer, it should
563 * never be used by the security module.
564 * @file contains the file structure.
565 * @cmd contains the operation to be performed.
566 * @arg contains the operational arguments.
567 * Return 0 if permission is granted.
568 * @file_set_fowner:
569 * Save owner security information (typically from current->security) in
570 * file->f_security for later use by the send_sigiotask hook.
571 * @file contains the file structure to update.
572 * Return 0 on success.
573 * @file_send_sigiotask:
574 * Check permission for the file owner @fown to send SIGIO or SIGURG to the
575 * process @tsk. Note that this hook is sometimes called from interrupt.
576 * Note that the fown_struct, @fown, is never outside the context of a
577 * struct file, so the file structure (and associated security information)
578 * can always be obtained:
579 * container_of(fown, struct file, f_owner)
580 * @tsk contains the structure of task receiving signal.
581 * @fown contains the file owner information.
582 * @sig is the signal that will be sent. When 0, kernel sends SIGIO.
583 * Return 0 if permission is granted.
584 * @file_receive:
585 * This hook allows security modules to control the ability of a process
586 * to receive an open file descriptor via socket IPC.
587 * @file contains the file structure being received.
588 * Return 0 if permission is granted.
589 *
590 * Security hook for dentry
591 *
592 * @dentry_open
593 * Save open-time permission checking state for later use upon
594 * file_permission, and recheck access if anything has changed
595 * since inode_permission.
596 *
597 * Security hooks for task operations.
598 *
599 * @task_create:
600 * Check permission before creating a child process. See the clone(2)
601 * manual page for definitions of the @clone_flags.
602 * @clone_flags contains the flags indicating what should be shared.
603 * Return 0 if permission is granted.
604 * @task_alloc_security:
605 * @p contains the task_struct for child process.
606 * Allocate and attach a security structure to the p->security field. The
607 * security field is initialized to NULL when the task structure is
608 * allocated.
609 * Return 0 if operation was successful.
610 * @task_free_security:
611 * @p contains the task_struct for process.
612 * Deallocate and clear the p->security field.
613 * @task_setuid:
614 * Check permission before setting one or more of the user identity
615 * attributes of the current process. The @flags parameter indicates
616 * which of the set*uid system calls invoked this hook and how to
617 * interpret the @id0, @id1, and @id2 parameters. See the LSM_SETID
618 * definitions at the beginning of this file for the @flags values and
619 * their meanings.
620 * @id0 contains a uid.
621 * @id1 contains a uid.
622 * @id2 contains a uid.
623 * @flags contains one of the LSM_SETID_* values.
624 * Return 0 if permission is granted.
625 * @task_post_setuid:
626 * Update the module's state after setting one or more of the user
627 * identity attributes of the current process. The @flags parameter
628 * indicates which of the set*uid system calls invoked this hook. If
629 * @flags is LSM_SETID_FS, then @old_ruid is the old fs uid and the other
630 * parameters are not used.
631 * @old_ruid contains the old real uid (or fs uid if LSM_SETID_FS).
632 * @old_euid contains the old effective uid (or -1 if LSM_SETID_FS).
633 * @old_suid contains the old saved uid (or -1 if LSM_SETID_FS).
634 * @flags contains one of the LSM_SETID_* values.
635 * Return 0 on success.
636 * @task_setgid:
637 * Check permission before setting one or more of the group identity
638 * attributes of the current process. The @flags parameter indicates
639 * which of the set*gid system calls invoked this hook and how to
640 * interpret the @id0, @id1, and @id2 parameters. See the LSM_SETID
641 * definitions at the beginning of this file for the @flags values and
642 * their meanings.
643 * @id0 contains a gid.
644 * @id1 contains a gid.
645 * @id2 contains a gid.
646 * @flags contains one of the LSM_SETID_* values.
647 * Return 0 if permission is granted.
648 * @task_setpgid:
649 * Check permission before setting the process group identifier of the
650 * process @p to @pgid.
651 * @p contains the task_struct for process being modified.
652 * @pgid contains the new pgid.
653 * Return 0 if permission is granted.
654 * @task_getpgid:
655 * Check permission before getting the process group identifier of the
656 * process @p.
657 * @p contains the task_struct for the process.
658 * Return 0 if permission is granted.
659 * @task_getsid:
660 * Check permission before getting the session identifier of the process
661 * @p.
662 * @p contains the task_struct for the process.
663 * Return 0 if permission is granted.
664 * @task_getsecid:
665 * Retrieve the security identifier of the process @p.
666 * @p contains the task_struct for the process and place is into @secid.
667 * @task_setgroups:
668 * Check permission before setting the supplementary group set of the
669 * current process.
670 * @group_info contains the new group information.
671 * Return 0 if permission is granted.
672 * @task_setnice:
673 * Check permission before setting the nice value of @p to @nice.
674 * @p contains the task_struct of process.
675 * @nice contains the new nice value.
676 * Return 0 if permission is granted.
677 * @task_setioprio
678 * Check permission before setting the ioprio value of @p to @ioprio.
679 * @p contains the task_struct of process.
680 * @ioprio contains the new ioprio value
681 * Return 0 if permission is granted.
682 * @task_getioprio
683 * Check permission before getting the ioprio value of @p.
684 * @p contains the task_struct of process.
685 * Return 0 if permission is granted.
686 * @task_setrlimit:
687 * Check permission before setting the resource limits of the current
688 * process for @resource to @new_rlim. The old resource limit values can
689 * be examined by dereferencing (current->signal->rlim + resource).
690 * @resource contains the resource whose limit is being set.
691 * @new_rlim contains the new limits for @resource.
692 * Return 0 if permission is granted.
693 * @task_setscheduler:
694 * Check permission before setting scheduling policy and/or parameters of
695 * process @p based on @policy and @lp.
696 * @p contains the task_struct for process.
697 * @policy contains the scheduling policy.
698 * @lp contains the scheduling parameters.
699 * Return 0 if permission is granted.
700 * @task_getscheduler:
701 * Check permission before obtaining scheduling information for process
702 * @p.
703 * @p contains the task_struct for process.
704 * Return 0 if permission is granted.
705 * @task_movememory
706 * Check permission before moving memory owned by process @p.
707 * @p contains the task_struct for process.
708 * Return 0 if permission is granted.
709 * @task_kill:
710 * Check permission before sending signal @sig to @p. @info can be NULL,
711 * the constant 1, or a pointer to a siginfo structure. If @info is 1 or
712 * SI_FROMKERNEL(info) is true, then the signal should be viewed as coming
713 * from the kernel and should typically be permitted.
714 * SIGIO signals are handled separately by the send_sigiotask hook in
715 * file_security_ops.
716 * @p contains the task_struct for process.
717 * @info contains the signal information.
718 * @sig contains the signal value.
719 * @secid contains the sid of the process where the signal originated
720 * Return 0 if permission is granted.
721 * @task_wait:
722 * Check permission before allowing a process to reap a child process @p
723 * and collect its status information.
724 * @p contains the task_struct for process.
725 * Return 0 if permission is granted.
726 * @task_prctl:
727 * Check permission before performing a process control operation on the
728 * current process.
729 * @option contains the operation.
730 * @arg2 contains a argument.
731 * @arg3 contains a argument.
732 * @arg4 contains a argument.
733 * @arg5 contains a argument.
734 * Return 0 if permission is granted.
735 * @task_reparent_to_init:
736 * Set the security attributes in @p->security for a kernel thread that
737 * is being reparented to the init task.
738 * @p contains the task_struct for the kernel thread.
739 * @task_to_inode:
740 * Set the security attributes for an inode based on an associated task's
741 * security attributes, e.g. for /proc/pid inodes.
742 * @p contains the task_struct for the task.
743 * @inode contains the inode structure for the inode.
744 *
745 * Security hooks for Netlink messaging.
746 *
747 * @netlink_send:
748 * Save security information for a netlink message so that permission
749 * checking can be performed when the message is processed. The security
750 * information can be saved using the eff_cap field of the
751 * netlink_skb_parms structure. Also may be used to provide fine
752 * grained control over message transmission.
753 * @sk associated sock of task sending the message.,
754 * @skb contains the sk_buff structure for the netlink message.
755 * Return 0 if the information was successfully saved and message
756 * is allowed to be transmitted.
757 * @netlink_recv:
758 * Check permission before processing the received netlink message in
759 * @skb.
760 * @skb contains the sk_buff structure for the netlink message.
761 * @cap indicates the capability required
762 * Return 0 if permission is granted.
763 *
764 * Security hooks for Unix domain networking.
765 *
766 * @unix_stream_connect:
767 * Check permissions before establishing a Unix domain stream connection
768 * between @sock and @other.
769 * @sock contains the socket structure.
770 * @other contains the peer socket structure.
771 * Return 0 if permission is granted.
772 * @unix_may_send:
773 * Check permissions before connecting or sending datagrams from @sock to
774 * @other.
775 * @sock contains the socket structure.
776 * @sock contains the peer socket structure.
777 * Return 0 if permission is granted.
778 *
779 * The @unix_stream_connect and @unix_may_send hooks were necessary because
780 * Linux provides an alternative to the conventional file name space for Unix
781 * domain sockets. Whereas binding and connecting to sockets in the file name
782 * space is mediated by the typical file permissions (and caught by the mknod
783 * and permission hooks in inode_security_ops), binding and connecting to
784 * sockets in the abstract name space is completely unmediated. Sufficient
785 * control of Unix domain sockets in the abstract name space isn't possible
786 * using only the socket layer hooks, since we need to know the actual target
787 * socket, which is not looked up until we are inside the af_unix code.
788 *
789 * Security hooks for socket operations.
790 *
791 * @socket_create:
792 * Check permissions prior to creating a new socket.
793 * @family contains the requested protocol family.
794 * @type contains the requested communications type.
795 * @protocol contains the requested protocol.
796 * @kern set to 1 if a kernel socket.
797 * Return 0 if permission is granted.
798 * @socket_post_create:
799 * This hook allows a module to update or allocate a per-socket security
800 * structure. Note that the security field was not added directly to the
801 * socket structure, but rather, the socket security information is stored
802 * in the associated inode. Typically, the inode alloc_security hook will
803 * allocate and and attach security information to
804 * sock->inode->i_security. This hook may be used to update the
805 * sock->inode->i_security field with additional information that wasn't
806 * available when the inode was allocated.
807 * @sock contains the newly created socket structure.
808 * @family contains the requested protocol family.
809 * @type contains the requested communications type.
810 * @protocol contains the requested protocol.
811 * @kern set to 1 if a kernel socket.
812 * @socket_bind:
813 * Check permission before socket protocol layer bind operation is
814 * performed and the socket @sock is bound to the address specified in the
815 * @address parameter.
816 * @sock contains the socket structure.
817 * @address contains the address to bind to.
818 * @addrlen contains the length of address.
819 * Return 0 if permission is granted.
820 * @socket_connect:
821 * Check permission before socket protocol layer connect operation
822 * attempts to connect socket @sock to a remote address, @address.
823 * @sock contains the socket structure.
824 * @address contains the address of remote endpoint.
825 * @addrlen contains the length of address.
826 * Return 0 if permission is granted.
827 * @socket_listen:
828 * Check permission before socket protocol layer listen operation.
829 * @sock contains the socket structure.
830 * @backlog contains the maximum length for the pending connection queue.
831 * Return 0 if permission is granted.
832 * @socket_accept:
833 * Check permission before accepting a new connection. Note that the new
834 * socket, @newsock, has been created and some information copied to it,
835 * but the accept operation has not actually been performed.
836 * @sock contains the listening socket structure.
837 * @newsock contains the newly created server socket for connection.
838 * Return 0 if permission is granted.
839 * @socket_post_accept:
840 * This hook allows a security module to copy security
841 * information into the newly created socket's inode.
842 * @sock contains the listening socket structure.
843 * @newsock contains the newly created server socket for connection.
844 * @socket_sendmsg:
845 * Check permission before transmitting a message to another socket.
846 * @sock contains the socket structure.
847 * @msg contains the message to be transmitted.
848 * @size contains the size of message.
849 * Return 0 if permission is granted.
850 * @socket_recvmsg:
851 * Check permission before receiving a message from a socket.
852 * @sock contains the socket structure.
853 * @msg contains the message structure.
854 * @size contains the size of message structure.
855 * @flags contains the operational flags.
856 * Return 0 if permission is granted.
857 * @socket_getsockname:
858 * Check permission before the local address (name) of the socket object
859 * @sock is retrieved.
860 * @sock contains the socket structure.
861 * Return 0 if permission is granted.
862 * @socket_getpeername:
863 * Check permission before the remote address (name) of a socket object
864 * @sock is retrieved.
865 * @sock contains the socket structure.
866 * Return 0 if permission is granted.
867 * @socket_getsockopt:
868 * Check permissions before retrieving the options associated with socket
869 * @sock.
870 * @sock contains the socket structure.
871 * @level contains the protocol level to retrieve option from.
872 * @optname contains the name of option to retrieve.
873 * Return 0 if permission is granted.
874 * @socket_setsockopt:
875 * Check permissions before setting the options associated with socket
876 * @sock.
877 * @sock contains the socket structure.
878 * @level contains the protocol level to set options for.
879 * @optname contains the name of the option to set.
880 * Return 0 if permission is granted.
881 * @socket_shutdown:
882 * Checks permission before all or part of a connection on the socket
883 * @sock is shut down.
884 * @sock contains the socket structure.
885 * @how contains the flag indicating how future sends and receives are handled.
886 * Return 0 if permission is granted.
887 * @socket_sock_rcv_skb:
888 * Check permissions on incoming network packets. This hook is distinct
889 * from Netfilter's IP input hooks since it is the first time that the
890 * incoming sk_buff @skb has been associated with a particular socket, @sk.
891 * @sk contains the sock (not socket) associated with the incoming sk_buff.
892 * @skb contains the incoming network data.
893 * @socket_getpeersec_stream:
894 * This hook allows the security module to provide peer socket security
895 * state for unix or connected tcp sockets to userspace via getsockopt
896 * SO_GETPEERSEC. For tcp sockets this can be meaningful if the
897 * socket is associated with an ipsec SA.
898 * @sock is the local socket.
899 * @optval userspace memory where the security state is to be copied.
900 * @optlen userspace int where the module should copy the actual length
901 * of the security state.
902 * @len as input is the maximum length to copy to userspace provided
903 * by the caller.
904 * Return 0 if all is well, otherwise, typical getsockopt return
905 * values.
906 * @socket_getpeersec_dgram:
907 * This hook allows the security module to provide peer socket security
908 * state for udp sockets on a per-packet basis to userspace via
909 * getsockopt SO_GETPEERSEC. The application must first have indicated
910 * the IP_PASSSEC option via getsockopt. It can then retrieve the
911 * security state returned by this hook for a packet via the SCM_SECURITY
912 * ancillary message type.
913 * @skb is the skbuff for the packet being queried
914 * @secdata is a pointer to a buffer in which to copy the security data
915 * @seclen is the maximum length for @secdata
916 * Return 0 on success, error on failure.
917 * @sk_alloc_security:
918 * Allocate and attach a security structure to the sk->sk_security field,
919 * which is used to copy security attributes between local stream sockets.
920 * @sk_free_security:
921 * Deallocate security structure.
922 * @sk_clone_security:
923 * Clone/copy security structure.
924 * @sk_getsecid:
925 * Retrieve the LSM-specific secid for the sock to enable caching of network
926 * authorizations.
927 * @sock_graft:
928 * Sets the socket's isec sid to the sock's sid.
929 * @inet_conn_request:
930 * Sets the openreq's sid to socket's sid with MLS portion taken from peer sid.
931 * @inet_csk_clone:
932 * Sets the new child socket's sid to the openreq sid.
933 * @inet_conn_established:
934 * Sets the connection's peersid to the secmark on skb.
935 * @req_classify_flow:
936 * Sets the flow's sid to the openreq sid.
937 *
938 * Security hooks for XFRM operations.
939 *
940 * @xfrm_policy_alloc_security:
941 * @xp contains the xfrm_policy being added to Security Policy Database
942 * used by the XFRM system.
943 * @sec_ctx contains the security context information being provided by
944 * the user-level policy update program (e.g., setkey).
945 * Allocate a security structure to the xp->security field; the security
946 * field is initialized to NULL when the xfrm_policy is allocated.
947 * Return 0 if operation was successful (memory to allocate, legal context)
948 * @xfrm_policy_clone_security:
949 * @old contains an existing xfrm_policy in the SPD.
950 * @new contains a new xfrm_policy being cloned from old.
951 * Allocate a security structure to the new->security field
952 * that contains the information from the old->security field.
953 * Return 0 if operation was successful (memory to allocate).
954 * @xfrm_policy_free_security:
955 * @xp contains the xfrm_policy
956 * Deallocate xp->security.
957 * @xfrm_policy_delete_security:
958 * @xp contains the xfrm_policy.
959 * Authorize deletion of xp->security.
960 * @xfrm_state_alloc_security:
961 * @x contains the xfrm_state being added to the Security Association
962 * Database by the XFRM system.
963 * @sec_ctx contains the security context information being provided by
964 * the user-level SA generation program (e.g., setkey or racoon).
965 * @secid contains the secid from which to take the mls portion of the context.
966 * Allocate a security structure to the x->security field; the security
967 * field is initialized to NULL when the xfrm_state is allocated. Set the
968 * context to correspond to either sec_ctx or polsec, with the mls portion
969 * taken from secid in the latter case.
970 * Return 0 if operation was successful (memory to allocate, legal context).
971 * @xfrm_state_free_security:
972 * @x contains the xfrm_state.
973 * Deallocate x->security.
974 * @xfrm_state_delete_security:
975 * @x contains the xfrm_state.
976 * Authorize deletion of x->security.
977 * @xfrm_policy_lookup:
978 * @xp contains the xfrm_policy for which the access control is being
979 * checked.
980 * @fl_secid contains the flow security label that is used to authorize
981 * access to the policy xp.
982 * @dir contains the direction of the flow (input or output).
983 * Check permission when a flow selects a xfrm_policy for processing
984 * XFRMs on a packet. The hook is called when selecting either a
985 * per-socket policy or a generic xfrm policy.
986 * Return 0 if permission is granted, -ESRCH otherwise, or -errno
987 * on other errors.
988 * @xfrm_state_pol_flow_match:
989 * @x contains the state to match.
990 * @xp contains the policy to check for a match.
991 * @fl contains the flow to check for a match.
992 * Return 1 if there is a match.
993 * @xfrm_decode_session:
994 * @skb points to skb to decode.
995 * @secid points to the flow key secid to set.
996 * @ckall says if all xfrms used should be checked for same secid.
997 * Return 0 if ckall is zero or all xfrms used have the same secid.
998 *
999 * Security hooks affecting all Key Management operations
1000 *
1001 * @key_alloc:
1002 * Permit allocation of a key and assign security data. Note that key does
1003 * not have a serial number assigned at this point.
1004 * @key points to the key.
1005 * @flags is the allocation flags
1006 * Return 0 if permission is granted, -ve error otherwise.
1007 * @key_free:
1008 * Notification of destruction; free security data.
1009 * @key points to the key.
1010 * No return value.
1011 * @key_permission:
1012 * See whether a specific operational right is granted to a process on a
1013 * key.
1014 * @key_ref refers to the key (key pointer + possession attribute bit).
1015 * @context points to the process to provide the context against which to
1016 * evaluate the security data on the key.
1017 * @perm describes the combination of permissions required of this key.
1018 * Return 1 if permission granted, 0 if permission denied and -ve it the
1019 * normal permissions model should be effected.
1020 *
1021 * Security hooks affecting all System V IPC operations.
1022 *
1023 * @ipc_permission:
1024 * Check permissions for access to IPC
1025 * @ipcp contains the kernel IPC permission structure
1026 * @flag contains the desired (requested) permission set
1027 * Return 0 if permission is granted.
1028 *
1029 * Security hooks for individual messages held in System V IPC message queues
1030 * @msg_msg_alloc_security:
1031 * Allocate and attach a security structure to the msg->security field.
1032 * The security field is initialized to NULL when the structure is first
1033 * created.
1034 * @msg contains the message structure to be modified.
1035 * Return 0 if operation was successful and permission is granted.
1036 * @msg_msg_free_security:
1037 * Deallocate the security structure for this message.
1038 * @msg contains the message structure to be modified.
1039 *
1040 * Security hooks for System V IPC Message Queues
1041 *
1042 * @msg_queue_alloc_security:
1043 * Allocate and attach a security structure to the
1044 * msq->q_perm.security field. The security field is initialized to
1045 * NULL when the structure is first created.
1046 * @msq contains the message queue structure to be modified.
1047 * Return 0 if operation was successful and permission is granted.
1048 * @msg_queue_free_security:
1049 * Deallocate security structure for this message queue.
1050 * @msq contains the message queue structure to be modified.
1051 * @msg_queue_associate:
1052 * Check permission when a message queue is requested through the
1053 * msgget system call. This hook is only called when returning the
1054 * message queue identifier for an existing message queue, not when a
1055 * new message queue is created.
1056 * @msq contains the message queue to act upon.
1057 * @msqflg contains the operation control flags.
1058 * Return 0 if permission is granted.
1059 * @msg_queue_msgctl:
1060 * Check permission when a message control operation specified by @cmd
1061 * is to be performed on the message queue @msq.
1062 * The @msq may be NULL, e.g. for IPC_INFO or MSG_INFO.
1063 * @msq contains the message queue to act upon. May be NULL.
1064 * @cmd contains the operation to be performed.
1065 * Return 0 if permission is granted.
1066 * @msg_queue_msgsnd:
1067 * Check permission before a message, @msg, is enqueued on the message
1068 * queue, @msq.
1069 * @msq contains the message queue to send message to.
1070 * @msg contains the message to be enqueued.
1071 * @msqflg contains operational flags.
1072 * Return 0 if permission is granted.
1073 * @msg_queue_msgrcv:
1074 * Check permission before a message, @msg, is removed from the message
1075 * queue, @msq. The @target task structure contains a pointer to the
1076 * process that will be receiving the message (not equal to the current
1077 * process when inline receives are being performed).
1078 * @msq contains the message queue to retrieve message from.
1079 * @msg contains the message destination.
1080 * @target contains the task structure for recipient process.
1081 * @type contains the type of message requested.
1082 * @mode contains the operational flags.
1083 * Return 0 if permission is granted.
1084 *
1085 * Security hooks for System V Shared Memory Segments
1086 *
1087 * @shm_alloc_security:
1088 * Allocate and attach a security structure to the shp->shm_perm.security
1089 * field. The security field is initialized to NULL when the structure is
1090 * first created.
1091 * @shp contains the shared memory structure to be modified.
1092 * Return 0 if operation was successful and permission is granted.
1093 * @shm_free_security:
1094 * Deallocate the security struct for this memory segment.
1095 * @shp contains the shared memory structure to be modified.
1096 * @shm_associate:
1097 * Check permission when a shared memory region is requested through the
1098 * shmget system call. This hook is only called when returning the shared
1099 * memory region identifier for an existing region, not when a new shared
1100 * memory region is created.
1101 * @shp contains the shared memory structure to be modified.
1102 * @shmflg contains the operation control flags.
1103 * Return 0 if permission is granted.
1104 * @shm_shmctl:
1105 * Check permission when a shared memory control operation specified by
1106 * @cmd is to be performed on the shared memory region @shp.
1107 * The @shp may be NULL, e.g. for IPC_INFO or SHM_INFO.
1108 * @shp contains shared memory structure to be modified.
1109 * @cmd contains the operation to be performed.
1110 * Return 0 if permission is granted.
1111 * @shm_shmat:
1112 * Check permissions prior to allowing the shmat system call to attach the
1113 * shared memory segment @shp to the data segment of the calling process.
1114 * The attaching address is specified by @shmaddr.
1115 * @shp contains the shared memory structure to be modified.
1116 * @shmaddr contains the address to attach memory region to.
1117 * @shmflg contains the operational flags.
1118 * Return 0 if permission is granted.
1119 *
1120 * Security hooks for System V Semaphores
1121 *
1122 * @sem_alloc_security:
1123 * Allocate and attach a security structure to the sma->sem_perm.security
1124 * field. The security field is initialized to NULL when the structure is
1125 * first created.
1126 * @sma contains the semaphore structure
1127 * Return 0 if operation was successful and permission is granted.
1128 * @sem_free_security:
1129 * deallocate security struct for this semaphore
1130 * @sma contains the semaphore structure.
1131 * @sem_associate:
1132 * Check permission when a semaphore is requested through the semget
1133 * system call. This hook is only called when returning the semaphore
1134 * identifier for an existing semaphore, not when a new one must be
1135 * created.
1136 * @sma contains the semaphore structure.
1137 * @semflg contains the operation control flags.
1138 * Return 0 if permission is granted.
1139 * @sem_semctl:
1140 * Check permission when a semaphore operation specified by @cmd is to be
1141 * performed on the semaphore @sma. The @sma may be NULL, e.g. for
1142 * IPC_INFO or SEM_INFO.
1143 * @sma contains the semaphore structure. May be NULL.
1144 * @cmd contains the operation to be performed.
1145 * Return 0 if permission is granted.
1146 * @sem_semop
1147 * Check permissions before performing operations on members of the
1148 * semaphore set @sma. If the @alter flag is nonzero, the semaphore set
1149 * may be modified.
1150 * @sma contains the semaphore structure.
1151 * @sops contains the operations to perform.
1152 * @nsops contains the number of operations to perform.
1153 * @alter contains the flag indicating whether changes are to be made.
1154 * Return 0 if permission is granted.
1155 *
1156 * @ptrace:
1157 * Check permission before allowing the @parent process to trace the
1158 * @child process.
1159 * Security modules may also want to perform a process tracing check
1160 * during an execve in the set_security or apply_creds hooks of
1161 * binprm_security_ops if the process is being traced and its security
1162 * attributes would be changed by the execve.
1163 * @parent contains the task_struct structure for parent process.
1164 * @child contains the task_struct structure for child 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_check:
1177 * Check permission before setting the @effective, @inheritable, and
1178 * @permitted capability sets for the @target process.
1179 * Caveat: @target is also set to current if a set of processes is
1180 * specified (i.e. all processes other than current and init or a
1181 * particular process group). Hence, the capset_set hook may need to
1182 * revalidate permission to the actual target process.
1183 * @target contains the task_struct structure for target process.
1184 * @effective contains the effective capability set.
1185 * @inheritable contains the inheritable capability set.
1186 * @permitted contains the permitted capability set.
1187 * Return 0 if permission is granted.
1188 * @capset_set:
1189 * Set the @effective, @inheritable, and @permitted capability sets for
1190 * the @target process. Since capset_check cannot always check permission
1191 * to the real @target process, this hook may also perform permission
1192 * checking to determine if the current process is allowed to set the
1193 * capability sets of the @target process. However, this hook has no way
1194 * of returning an error due to the structure of the sys_capset code.
1195 * @target contains the task_struct structure for target process.
1196 * @effective contains the effective capability set.
1197 * @inheritable contains the inheritable capability set.
1198 * @permitted contains the permitted capability set.
1199 * @capable:
1200 * Check whether the @tsk process has the @cap capability.
1201 * @tsk contains the task_struct for the process.
1202 * @cap contains the capability <include/linux/capability.h>.
1203 * Return 0 if the capability is granted for @tsk.
1204 * @acct:
1205 * Check permission before enabling or disabling process accounting. If
1206 * accounting is being enabled, then @file refers to the open file used to
1207 * store accounting records. If accounting is being disabled, then @file
1208 * is NULL.
1209 * @file contains the file structure for the accounting file (may be NULL).
1210 * Return 0 if permission is granted.
1211 * @sysctl:
1212 * Check permission before accessing the @table sysctl variable in the
1213 * manner specified by @op.
1214 * @table contains the ctl_table structure for the sysctl variable.
1215 * @op contains the operation (001 = search, 002 = write, 004 = read).
1216 * Return 0 if permission is granted.
1217 * @syslog:
1218 * Check permission before accessing the kernel message ring or changing
1219 * logging to the console.
1220 * See the syslog(2) manual page for an explanation of the @type values.
1221 * @type contains the type of action.
1222 * Return 0 if permission is granted.
1223 * @settime:
1224 * Check permission to change the system time.
1225 * struct timespec and timezone are defined in include/linux/time.h
1226 * @ts contains new time
1227 * @tz contains new timezone
1228 * Return 0 if permission is granted.
1229 * @vm_enough_memory:
1230 * Check permissions for allocating a new virtual mapping.
1231 * @mm contains the mm struct it is being added to.
1232 * @pages contains the number of pages.
1233 * Return 0 if permission is granted.
1234 *
1235 * @register_security:
1236 * allow module stacking.
1237 * @name contains the name of the security module being stacked.
1238 * @ops contains a pointer to the struct security_operations of the module to stack.
1239 *
1240 * @secid_to_secctx:
1241 * Convert secid to security context.
1242 * @secid contains the security ID.
1243 * @secdata contains the pointer that stores the converted security context.
1244 * @secctx_to_secid:
1245 * Convert security context to secid.
1246 * @secid contains the pointer to the generated security ID.
1247 * @secdata contains the security context.
1248 *
1249 * @release_secctx:
1250 * Release the security context.
1251 * @secdata contains the security context.
1252 * @seclen contains the length of the security context.
1253 *
1254 * This is the main security structure.
1255 */
1291 =======
1316 =======
1324 =======
1360 int (*inode_getsecurity)(const struct inode *inode, const char *name, void **buffer, bool alloc);
1361 int (*inode_setsecurity)(struct inode *inode, const char *name, const void *value, size_t size, int flags);
1447 /* allow module stacking */
1459 #ifdef CONFIG_SECURITY_NETWORK
1485 int (*socket_getpeersec_stream) (struct socket *sock, char __user *optval, int __user *optlen, unsigned len);
1499 #ifdef CONFIG_SECURITY_NETWORK_XFRM
1507 u32 secid);
1516 /* key management security hooks */
1517 #ifdef CONFIG_KEYS
1522 key_perm_t perm);
1526 };
1528 /* prototypes */
1539 /* Security operations */
1573 =======
1593 =======
1601 =======
1635 int security_inode_getsecurity(const struct inode *inode, const char *name, void **buffer, bool alloc);
1636 int security_inode_setsecurity(struct inode *inode, const char *name, const void *value, size_t size, int flags);
1714 =======
1716 };
1719 {
1720 }
1723 {
1724 }
1727 /*
1728 * This is the default capabilities functionality. Most of these functions
1729 * are just stubbed out, but a few must call the proper capable code.
1730 */
1733 {
1735 }
1738 {
1740 }
1746 {
1748 }
1754 {
1756 }
1762 {
1764 }
1767 {
1769 }
1772 {
1774 }
1777 {
1779 }
1783 {
1785 }
1788 {
1790 }
1793 {
1795 }
1798 {
1800 }
1803 {
1805 }
1808 {
1810 }
1813 {
1815 }
1818 { }
1821 {
1823 }
1826 {
1828 }
1831 {
1833 }
1836 {
1838 }
1841 {
1843 }
1846 {
1848 }
1851 { }
1856 =======
1859 {
1861 }
1864 {
1866 }
1869 {
1871 }
1876 {
1878 }
1882 {
1884 }
1887 {
1889 }
1892 { }
1895 { }
1899 { }
1903 { }
1907 {
1909 }
1913 { }
1915 =======
1918 {
1921 }
1925 {
1927 }
1931 { }
1934 {
1936 }
1940 {
1942 }
1945 { }
1952 {
1954 }
1959 {
1961 }
1966 {
1968 }
1972 {
1974 }
1979 {
1981 }
1986 {
1988 }
1992 {
1994 }
1999 {
2001 }
2007 {
2009 }
2012 {
2014 }
2018 {
2020 }
2024 {
2026 }
2030 {
2032 }
2036 {
2038 }
2041 { }
2045 {
2047 }
2051 { }
2054 {
2056 }
2059 {
2061 }
2064 {
2066 }
2069 {
2071 }
2074 {
2076 }
2078 static inline int security_inode_getsecurity(const struct inode *inode, const char *name, void **buffer, bool alloc)
2079 {
2081 }
2083 static inline int security_inode_setsecurity(struct inode *inode, const char *name, const void *value, size_t size, int flags)
2084 {
2086 }
2088 static inline int security_inode_listsecurity(struct inode *inode, char *buffer, size_t buffer_size)
2089 {
2091 }
2094 {
2096 }
2099 {
2101 }
2104 { }
2108 {
2110 }
2117 {
2119 }
2124 {
2126 }
2129 {
2131 }
2135 {
2137 }
2140 {
2142 }
2147 {
2149 }
2152 {
2154 }
2157 {
2159 }
2162 {
2164 }
2167 {
2169 }
2172 { }
2176 {
2178 }
2182 {
2184 }
2188 {
2190 }
2193 {
2195 }
2198 {
2200 }
2203 {
2205 }
2208 { }
2211 {
2213 }
2216 {
2218 }
2221 {
2223 }
2226 {
2228 }
2232 {
2234 }
2239 {
2241 }
2244 {
2246 }
2249 {
2251 }
2255 u32 secid)
2256 {
2258 }
2261 {
2263 }
2269 {
2271 }
2274 {
2276 }
2279 { }
2283 {
2285 }
2288 {
2290 }
2293 { }
2296 {
2298 }
2301 { }
2305 {
2307 }
2310 {
2312 }
2316 {
2318 }
2324 {
2326 }
2329 {
2331 }
2334 { }
2338 {
2340 }
2343 {
2345 }
2349 {
2351 }
2354 {
2356 }
2359 { }
2362 {
2364 }
2367 {
2369 }
2374 {
2376 }
2379 { }
2382 {
2384 }
2386 static inline int security_setprocattr(struct task_struct *p, char *name, void *value, size_t size)
2387 {
2389 }
2392 {
2394 }
2397 {
2399 }
2403 {
2405 }
2408 mode_t mode,
2412 {
2414 }
2417 {
2418 }
2421 {
2423 }
2426 u32 seclen,
2428 {
2430 }
2433 {
2434 }
2437 #ifdef CONFIG_SECURITY_NETWORK
2479 {
2481 }
2485 {
2487 }
2491 {
2493 }
2499 {
2501 }
2506 {
2508 }
2513 {
2515 }
2518 {
2520 }
2524 {
2526 }
2530 {
2531 }
2535 {
2537 }
2542 {
2544 }
2547 {
2549 }
2552 {
2554 }
2558 {
2560 }
2564 {
2566 }
2569 {
2571 }
2574 {
2576 }
2580 {
2582 }
2584 static inline int security_socket_getpeersec_dgram(struct socket *sock, struct sk_buff *skb, u32 *secid)
2585 {
2587 }
2590 {
2592 }
2595 {
2596 }
2599 {
2600 }
2603 {
2604 }
2606 static inline void security_req_classify_flow(const struct request_sock *req, struct flowi *fl)
2607 {
2608 }
2611 {
2612 }
2616 {
2618 }
2622 {
2623 }
2627 {
2628 }
2631 #ifdef CONFIG_SECURITY_NETWORK_XFRM
2650 static inline int security_xfrm_policy_alloc(struct xfrm_policy *xp, struct xfrm_user_sec_ctx *sec_ctx)
2651 {
2653 }
2656 {
2658 }
2661 {
2662 }
2665 {
2667 }
2671 {
2673 }
2677 {
2679 }
2682 {
2683 }
2686 {
2688 }
2691 {
2693 }
2697 {
2699 }
2702 {
2704 }
2707 {
2708 }
2712 #ifdef CONFIG_KEYS
2713 #ifdef CONFIG_SECURITY
2720 #else
2725 {
2727 }
2730 {
2731 }
2735 key_perm_t perm)
2736 {
2738 }
2740 #endif