| blob | 0c8819170463624c57f7c968771727eed1038691 |
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>
32 #include <linux/msg.h>
33 #include <linux/sched.h>
34 #include <linux/key.h>
35 #include <linux/xfrm.h>
36 #include <linux/slab.h>
37 #include <net/flow.h>
39 /* Maximum number of letters for an LSM name string */
40 #define SECURITY_NAME_MAX 10
42 /* If capable should audit the security request */
43 #define SECURITY_CAP_NOAUDIT 0
44 #define SECURITY_CAP_AUDIT 1
49 /*
50 * These functions are in security/capability.c and are used
51 * as the default capabilities functions
52 */
58 extern int cap_capget(struct task_struct *target, kernel_cap_t *effective, kernel_cap_t *inheritable, kernel_cap_t *permitted);
100 #ifdef CONFIG_MMU
103 #else
104 #define dac_mmap_min_addr 0UL
105 #endif
107 /*
108 * Values used in the task_security_ops calls
109 */
110 /* setuid or setgid, id0 == uid or gid */
111 #define LSM_SETID_ID 1
113 /* setreuid or setregid, id0 == real, id1 == eff */
114 #define LSM_SETID_RE 2
116 /* setresuid or setresgid, id0 == real, id1 == eff, uid2 == saved */
117 #define LSM_SETID_RES 4
119 /* setfsuid or setfsgid, id0 == fsuid or fsgid */
120 #define LSM_SETID_FS 8
122 /* forward declares to avoid warnings */
126 /* bprm->unsafe reasons */
127 #define LSM_UNSAFE_SHARE 1
128 #define LSM_UNSAFE_PTRACE 2
129 #define LSM_UNSAFE_PTRACE_CAP 4
131 #ifdef CONFIG_MMU
132 /*
133 * If a hint addr is less than mmap_min_addr change hint to be as
134 * low as possible but still greater than mmap_min_addr
135 */
137 {
143 }
146 #endif
148 #ifdef CONFIG_SECURITY
154 };
157 {
161 }
164 {
174 }
176 /**
177 * struct security_operations - main security structure
178 *
179 * Security module identifier.
180 *
181 * @name:
182 * A string that acts as a unique identifeir for the LSM with max number
183 * of characters = SECURITY_NAME_MAX.
184 *
185 * Security hooks for program execution operations.
186 *
187 * @bprm_set_creds:
188 * Save security information in the bprm->security field, typically based
189 * on information about the bprm->file, for later use by the apply_creds
190 * hook. This hook may also optionally check permissions (e.g. for
191 * transitions between security domains).
192 * This hook may be called multiple times during a single execve, e.g. for
193 * interpreters. The hook can tell whether it has already been called by
194 * checking to see if @bprm->security is non-NULL. If so, then the hook
195 * may decide either to retain the security information saved earlier or
196 * to replace it.
197 * @bprm contains the linux_binprm structure.
198 * Return 0 if the hook is successful and permission is granted.
199 * @bprm_check_security:
200 * This hook mediates the point when a search for a binary handler will
201 * begin. It allows a check the @bprm->security value which is set in the
202 * preceding set_creds call. The primary difference from set_creds is
203 * that the argv list and envp list are reliably available in @bprm. This
204 * hook may be called multiple times during a single execve; and in each
205 * pass set_creds is called first.
206 * @bprm contains the linux_binprm structure.
207 * Return 0 if the hook is successful and permission is granted.
208 * @bprm_committing_creds:
209 * Prepare to install the new security attributes of a process being
210 * transformed by an execve operation, based on the old credentials
211 * pointed to by @current->cred and the information set in @bprm->cred by
212 * the bprm_set_creds hook. @bprm points to the linux_binprm structure.
213 * This hook is a good place to perform state changes on the process such
214 * as closing open file descriptors to which access will no longer be
215 * granted when the attributes are changed. This is called immediately
216 * before commit_creds().
217 * @bprm_committed_creds:
218 * Tidy up after the installation of the new security attributes of a
219 * process being transformed by an execve operation. The new credentials
220 * have, by this point, been set to @current->cred. @bprm points to the
221 * linux_binprm structure. This hook is a good place to perform state
222 * changes on the process such as clearing out non-inheritable signal
223 * state. This is called immediately after commit_creds().
224 * @bprm_secureexec:
225 * Return a boolean value (0 or 1) indicating whether a "secure exec"
226 * is required. The flag is passed in the auxiliary table
227 * on the initial stack to the ELF interpreter to indicate whether libc
228 * should enable secure mode.
229 * @bprm contains the linux_binprm structure.
230 *
231 * Security hooks for filesystem operations.
232 *
233 * @sb_alloc_security:
234 * Allocate and attach a security structure to the sb->s_security field.
235 * The s_security field is initialized to NULL when the structure is
236 * allocated.
237 * @sb contains the super_block structure to be modified.
238 * Return 0 if operation was successful.
239 * @sb_free_security:
240 * Deallocate and clear the sb->s_security field.
241 * @sb contains the super_block structure to be modified.
242 * @sb_statfs:
243 * Check permission before obtaining filesystem statistics for the @mnt
244 * mountpoint.
245 * @dentry is a handle on the superblock for the filesystem.
246 * Return 0 if permission is granted.
247 * @sb_mount:
248 * Check permission before an object specified by @dev_name is mounted on
249 * the mount point named by @nd. For an ordinary mount, @dev_name
250 * identifies a device if the file system type requires a device. For a
251 * remount (@flags & MS_REMOUNT), @dev_name is irrelevant. For a
252 * loopback/bind mount (@flags & MS_BIND), @dev_name identifies the
253 * pathname of the object being mounted.
254 * @dev_name contains the name for object being mounted.
255 * @path contains the path for mount point object.
256 * @type contains the filesystem type.
257 * @flags contains the mount flags.
258 * @data contains the filesystem-specific data.
259 * Return 0 if permission is granted.
260 * @sb_copy_data:
261 * Allow mount option data to be copied prior to parsing by the filesystem,
262 * so that the security module can extract security-specific mount
263 * options cleanly (a filesystem may modify the data e.g. with strsep()).
264 * This also allows the original mount data to be stripped of security-
265 * specific options to avoid having to make filesystems aware of them.
266 * @type the type of filesystem being mounted.
267 * @orig the original mount data copied from userspace.
268 * @copy copied data which will be passed to the security module.
269 * Returns 0 if the copy was successful.
270 * @sb_umount:
271 * Check permission before the @mnt file system is unmounted.
272 * @mnt contains the mounted file system.
273 * @flags contains the unmount flags, e.g. MNT_FORCE.
274 * Return 0 if permission is granted.
275 * @sb_pivotroot:
276 * Check permission before pivoting the root filesystem.
277 * @old_path contains the path for the new location of the current root (put_old).
278 * @new_path contains the path for the new root (new_root).
279 * Return 0 if permission is granted.
280 * @sb_set_mnt_opts:
281 * Set the security relevant mount options used for a superblock
282 * @sb the superblock to set security mount options for
283 * @opts binary data structure containing all lsm mount data
284 * @sb_clone_mnt_opts:
285 * Copy all security options from a given superblock to another
286 * @oldsb old superblock which contain information to clone
287 * @newsb new superblock which needs filled in
288 * @sb_parse_opts_str:
289 * Parse a string of security data filling in the opts structure
290 * @options string containing all mount options known by the LSM
291 * @opts binary data structure usable by the LSM
292 *
293 * Security hooks for inode operations.
294 *
295 * @inode_alloc_security:
296 * Allocate and attach a security structure to @inode->i_security. The
297 * i_security field is initialized to NULL when the inode structure is
298 * allocated.
299 * @inode contains the inode structure.
300 * Return 0 if operation was successful.
301 * @inode_free_security:
302 * @inode contains the inode structure.
303 * Deallocate the inode security structure and set @inode->i_security to
304 * NULL.
305 * @inode_init_security:
306 * Obtain the security attribute name suffix and value to set on a newly
307 * created inode and set up the incore security field for the new inode.
308 * This hook is called by the fs code as part of the inode creation
309 * transaction and provides for atomic labeling of the inode, unlike
310 * the post_create/mkdir/... hooks called by the VFS. The hook function
311 * is expected to allocate the name and value via kmalloc, with the caller
312 * being responsible for calling kfree after using them.
313 * If the security module does not use security attributes or does
314 * not wish to put a security attribute on this particular inode,
315 * then it should return -EOPNOTSUPP to skip this processing.
316 * @inode contains the inode structure of the newly created inode.
317 * @dir contains the inode structure of the parent directory.
318 * @name will be set to the allocated name suffix (e.g. selinux).
319 * @value will be set to the allocated attribute value.
320 * @len will be set to the length of the value.
321 * Returns 0 if @name and @value have been successfully set,
322 * -EOPNOTSUPP if no security attribute is needed, or
323 * -ENOMEM on memory allocation failure.
324 * @inode_create:
325 * Check permission to create a regular file.
326 * @dir contains inode structure of the parent of the new file.
327 * @dentry contains the dentry structure for the file to be created.
328 * @mode contains the file mode of the file to be created.
329 * Return 0 if permission is granted.
330 * @inode_link:
331 * Check permission before creating a new hard link to a file.
332 * @old_dentry contains the dentry structure for an existing link to the file.
333 * @dir contains the inode structure of the parent directory of the new link.
334 * @new_dentry contains the dentry structure for the new link.
335 * Return 0 if permission is granted.
336 * @path_link:
337 * Check permission before creating a new hard link to a file.
338 * @old_dentry contains the dentry structure for an existing link
339 * to the file.
340 * @new_dir contains the path structure of the parent directory of
341 * the new link.
342 * @new_dentry contains the dentry structure for the new link.
343 * Return 0 if permission is granted.
344 * @inode_unlink:
345 * Check the permission to remove a hard link to a file.
346 * @dir contains the inode structure of parent directory of the file.
347 * @dentry contains the dentry structure for file to be unlinked.
348 * Return 0 if permission is granted.
349 * @path_unlink:
350 * Check the permission to remove a hard link to a file.
351 * @dir contains the path structure of parent directory of the file.
352 * @dentry contains the dentry structure for file to be unlinked.
353 * Return 0 if permission is granted.
354 * @inode_symlink:
355 * Check the permission to create a symbolic link to a file.
356 * @dir contains the inode structure of parent directory of the symbolic link.
357 * @dentry contains the dentry structure of the symbolic link.
358 * @old_name contains the pathname of file.
359 * Return 0 if permission is granted.
360 * @path_symlink:
361 * Check the permission to create a symbolic link to a file.
362 * @dir contains the path structure of parent directory of
363 * the symbolic link.
364 * @dentry contains the dentry structure of the symbolic link.
365 * @old_name contains the pathname of file.
366 * Return 0 if permission is granted.
367 * @inode_mkdir:
368 * Check permissions to create a new directory in the existing directory
369 * associated with inode strcture @dir.
370 * @dir containst the inode structure of parent of the directory to be created.
371 * @dentry contains the dentry structure of new directory.
372 * @mode contains the mode of new directory.
373 * Return 0 if permission is granted.
374 * @path_mkdir:
375 * Check permissions to create a new directory in the existing directory
376 * associated with path strcture @path.
377 * @dir containst the path structure of parent of the directory
378 * to be created.
379 * @dentry contains the dentry structure of new directory.
380 * @mode contains the mode of new directory.
381 * Return 0 if permission is granted.
382 * @inode_rmdir:
383 * Check the permission to remove a directory.
384 * @dir contains the inode structure of parent of the directory to be removed.
385 * @dentry contains the dentry structure of directory to be removed.
386 * Return 0 if permission is granted.
387 * @path_rmdir:
388 * Check the permission to remove a directory.
389 * @dir contains the path structure of parent of the directory to be
390 * removed.
391 * @dentry contains the dentry structure of directory to be removed.
392 * Return 0 if permission is granted.
393 * @inode_mknod:
394 * Check permissions when creating a special file (or a socket or a fifo
395 * file created via the mknod system call). Note that if mknod operation
396 * is being done for a regular file, then the create hook will be called
397 * and not this hook.
398 * @dir contains the inode structure of parent of the new file.
399 * @dentry contains the dentry structure of the new file.
400 * @mode contains the mode of the new file.
401 * @dev contains the device number.
402 * Return 0 if permission is granted.
403 * @path_mknod:
404 * Check permissions when creating a file. Note that this hook is called
405 * even if mknod operation is being done for a regular file.
406 * @dir contains the path structure of parent of the new file.
407 * @dentry contains the dentry structure of the new file.
408 * @mode contains the mode of the new file.
409 * @dev contains the undecoded device number. Use new_decode_dev() to get
410 * the decoded device number.
411 * Return 0 if permission is granted.
412 * @inode_rename:
413 * Check for permission to rename a file or directory.
414 * @old_dir contains the inode structure for parent of the old link.
415 * @old_dentry contains the dentry structure of the old link.
416 * @new_dir contains the inode structure for parent of the new link.
417 * @new_dentry contains the dentry structure of the new link.
418 * Return 0 if permission is granted.
419 * @path_rename:
420 * Check for permission to rename a file or directory.
421 * @old_dir contains the path structure for parent of the old link.
422 * @old_dentry contains the dentry structure of the old link.
423 * @new_dir contains the path structure for parent of the new link.
424 * @new_dentry contains the dentry structure of the new link.
425 * Return 0 if permission is granted.
426 * @path_chmod:
427 * Check for permission to change DAC's permission of a file or directory.
428 * @dentry contains the dentry structure.
429 * @mnt contains the vfsmnt structure.
430 * @mode contains DAC's mode.
431 * Return 0 if permission is granted.
432 * @path_chown:
433 * Check for permission to change owner/group of a file or directory.
434 * @path contains the path structure.
435 * @uid contains new owner's ID.
436 * @gid contains new group's ID.
437 * Return 0 if permission is granted.
438 * @path_chroot:
439 * Check for permission to change root directory.
440 * @path contains the path structure.
441 * Return 0 if permission is granted.
442 * @inode_readlink:
443 * Check the permission to read the symbolic link.
444 * @dentry contains the dentry structure for the file link.
445 * Return 0 if permission is granted.
446 * @inode_follow_link:
447 * Check permission to follow a symbolic link when looking up a pathname.
448 * @dentry contains the dentry structure for the link.
449 * @nd contains the nameidata structure for the parent directory.
450 * Return 0 if permission is granted.
451 * @inode_permission:
452 * Check permission before accessing an inode. This hook is called by the
453 * existing Linux permission function, so a security module can use it to
454 * provide additional checking for existing Linux permission checks.
455 * Notice that this hook is called when a file is opened (as well as many
456 * other operations), whereas the file_security_ops permission hook is
457 * called when the actual read/write operations are performed.
458 * @inode contains the inode structure to check.
459 * @mask contains the permission mask.
460 * @nd contains the nameidata (may be NULL).
461 * Return 0 if permission is granted.
462 * @inode_setattr:
463 * Check permission before setting file attributes. Note that the kernel
464 * call to notify_change is performed from several locations, whenever
465 * file attributes change (such as when a file is truncated, chown/chmod
466 * operations, transferring disk quotas, etc).
467 * @dentry contains the dentry structure for the file.
468 * @attr is the iattr structure containing the new file attributes.
469 * Return 0 if permission is granted.
470 * @path_truncate:
471 * Check permission before truncating a file.
472 * @path contains the path structure for the file.
473 * @length is the new length of the file.
474 * @time_attrs is the flags passed to do_truncate().
475 * Return 0 if permission is granted.
476 * @inode_getattr:
477 * Check permission before obtaining file attributes.
478 * @mnt is the vfsmount where the dentry was looked up
479 * @dentry contains the dentry structure for the file.
480 * Return 0 if permission is granted.
481 * @inode_setxattr:
482 * Check permission before setting the extended attributes
483 * @value identified by @name for @dentry.
484 * Return 0 if permission is granted.
485 * @inode_post_setxattr:
486 * Update inode security field after successful setxattr operation.
487 * @value identified by @name for @dentry.
488 * @inode_getxattr:
489 * Check permission before obtaining the extended attributes
490 * identified by @name for @dentry.
491 * Return 0 if permission is granted.
492 * @inode_listxattr:
493 * Check permission before obtaining the list of extended attribute
494 * names for @dentry.
495 * Return 0 if permission is granted.
496 * @inode_removexattr:
497 * Check permission before removing the extended attribute
498 * identified by @name for @dentry.
499 * Return 0 if permission is granted.
500 * @inode_getsecurity:
501 * Retrieve a copy of the extended attribute representation of the
502 * security label associated with @name for @inode via @buffer. Note that
503 * @name is the remainder of the attribute name after the security prefix
504 * has been removed. @alloc is used to specify of the call should return a
505 * value via the buffer or just the value length Return size of buffer on
506 * success.
507 * @inode_setsecurity:
508 * Set the security label associated with @name for @inode from the
509 * extended attribute value @value. @size indicates the size of the
510 * @value in bytes. @flags may be XATTR_CREATE, XATTR_REPLACE, or 0.
511 * Note that @name is the remainder of the attribute name after the
512 * security. prefix has been removed.
513 * Return 0 on success.
514 * @inode_listsecurity:
515 * Copy the extended attribute names for the security labels
516 * associated with @inode into @buffer. The maximum size of @buffer
517 * is specified by @buffer_size. @buffer may be NULL to request
518 * the size of the buffer required.
519 * Returns number of bytes used/required on success.
520 * @inode_need_killpriv:
521 * Called when an inode has been changed.
522 * @dentry is the dentry being changed.
523 * Return <0 on error to abort the inode change operation.
524 * Return 0 if inode_killpriv does not need to be called.
525 * Return >0 if inode_killpriv does need to be called.
526 * @inode_killpriv:
527 * The setuid bit is being removed. Remove similar security labels.
528 * Called with the dentry->d_inode->i_mutex held.
529 * @dentry is the dentry being changed.
530 * Return 0 on success. If error is returned, then the operation
531 * causing setuid bit removal is failed.
532 * @inode_getsecid:
533 * Get the secid associated with the node.
534 * @inode contains a pointer to the inode.
535 * @secid contains a pointer to the location where result will be saved.
536 * In case of failure, @secid will be set to zero.
537 *
538 * Security hooks for file operations
539 *
540 * @file_permission:
541 * Check file permissions before accessing an open file. This hook is
542 * called by various operations that read or write files. A security
543 * module can use this hook to perform additional checking on these
544 * operations, e.g. to revalidate permissions on use to support privilege
545 * bracketing or policy changes. Notice that this hook is used when the
546 * actual read/write operations are performed, whereas the
547 * inode_security_ops hook is called when a file is opened (as well as
548 * many other operations).
549 * Caveat: Although this hook can be used to revalidate permissions for
550 * various system call operations that read or write files, it does not
551 * address the revalidation of permissions for memory-mapped files.
552 * Security modules must handle this separately if they need such
553 * revalidation.
554 * @file contains the file structure being accessed.
555 * @mask contains the requested permissions.
556 * Return 0 if permission is granted.
557 * @file_alloc_security:
558 * Allocate and attach a security structure to the file->f_security field.
559 * The security field is initialized to NULL when the structure is first
560 * created.
561 * @file contains the file structure to secure.
562 * Return 0 if the hook is successful and permission is granted.
563 * @file_free_security:
564 * Deallocate and free any security structures stored in file->f_security.
565 * @file contains the file structure being modified.
566 * @file_ioctl:
567 * @file contains the file structure.
568 * @cmd contains the operation to perform.
569 * @arg contains the operational arguments.
570 * Check permission for an ioctl operation on @file. Note that @arg can
571 * sometimes represents a user space pointer; in other cases, it may be a
572 * simple integer value. When @arg represents a user space pointer, it
573 * should never be used by the security module.
574 * Return 0 if permission is granted.
575 * @file_mmap :
576 * Check permissions for a mmap operation. The @file may be NULL, e.g.
577 * if mapping anonymous memory.
578 * @file contains the file structure for file to map (may be NULL).
579 * @reqprot contains the protection requested by the application.
580 * @prot contains the protection that will be applied by the kernel.
581 * @flags contains the operational flags.
582 * Return 0 if permission is granted.
583 * @file_mprotect:
584 * Check permissions before changing memory access permissions.
585 * @vma contains the memory region to modify.
586 * @reqprot contains the protection requested by the application.
587 * @prot contains the protection that will be applied by the kernel.
588 * Return 0 if permission is granted.
589 * @file_lock:
590 * Check permission before performing file locking operations.
591 * Note: this hook mediates both flock and fcntl style locks.
592 * @file contains the file structure.
593 * @cmd contains the posix-translated lock operation to perform
594 * (e.g. F_RDLCK, F_WRLCK).
595 * Return 0 if permission is granted.
596 * @file_fcntl:
597 * Check permission before allowing the file operation specified by @cmd
598 * from being performed on the file @file. Note that @arg can sometimes
599 * represents a user space pointer; in other cases, it may be a simple
600 * integer value. When @arg represents a user space pointer, it should
601 * never be used by the security module.
602 * @file contains the file structure.
603 * @cmd contains the operation to be performed.
604 * @arg contains the operational arguments.
605 * Return 0 if permission is granted.
606 * @file_set_fowner:
607 * Save owner security information (typically from current->security) in
608 * file->f_security for later use by the send_sigiotask hook.
609 * @file contains the file structure to update.
610 * Return 0 on success.
611 * @file_send_sigiotask:
612 * Check permission for the file owner @fown to send SIGIO or SIGURG to the
613 * process @tsk. Note that this hook is sometimes called from interrupt.
614 * Note that the fown_struct, @fown, is never outside the context of a
615 * struct file, so the file structure (and associated security information)
616 * can always be obtained:
617 * container_of(fown, struct file, f_owner)
618 * @tsk contains the structure of task receiving signal.
619 * @fown contains the file owner information.
620 * @sig is the signal that will be sent. When 0, kernel sends SIGIO.
621 * Return 0 if permission is granted.
622 * @file_receive:
623 * This hook allows security modules to control the ability of a process
624 * to receive an open file descriptor via socket IPC.
625 * @file contains the file structure being received.
626 * Return 0 if permission is granted.
627 *
628 * Security hook for dentry
629 *
630 * @dentry_open
631 * Save open-time permission checking state for later use upon
632 * file_permission, and recheck access if anything has changed
633 * since inode_permission.
634 *
635 * Security hooks for task operations.
636 *
637 * @task_create:
638 * Check permission before creating a child process. See the clone(2)
639 * manual page for definitions of the @clone_flags.
640 * @clone_flags contains the flags indicating what should be shared.
641 * Return 0 if permission is granted.
642 * @cred_alloc_blank:
643 * @cred points to the credentials.
644 * @gfp indicates the atomicity of any memory allocations.
645 * Only allocate sufficient memory and attach to @cred such that
646 * cred_transfer() will not get ENOMEM.
647 * @cred_free:
648 * @cred points to the credentials.
649 * Deallocate and clear the cred->security field in a set of credentials.
650 * @cred_prepare:
651 * @new points to the new credentials.
652 * @old points to the original credentials.
653 * @gfp indicates the atomicity of any memory allocations.
654 * Prepare a new set of credentials by copying the data from the old set.
655 * @cred_transfer:
656 * @new points to the new credentials.
657 * @old points to the original credentials.
658 * Transfer data from original creds to new creds
659 * @kernel_act_as:
660 * Set the credentials for a kernel service to act as (subjective context).
661 * @new points to the credentials to be modified.
662 * @secid specifies the security ID to be set
663 * The current task must be the one that nominated @secid.
664 * Return 0 if successful.
665 * @kernel_create_files_as:
666 * Set the file creation context in a set of credentials to be the same as
667 * the objective context of the specified inode.
668 * @new points to the credentials to be modified.
669 * @inode points to the inode to use as a reference.
670 * The current task must be the one that nominated @inode.
671 * Return 0 if successful.
672 * @kernel_module_request:
673 * Ability to trigger the kernel to automatically upcall to userspace for
674 * userspace to load a kernel module with the given name.
675 * @kmod_name name of the module requested by the kernel
676 * Return 0 if successful.
677 * @task_fix_setuid:
678 * Update the module's state after setting one or more of the user
679 * identity attributes of the current process. The @flags parameter
680 * indicates which of the set*uid system calls invoked this hook. If
681 * @new is the set of credentials that will be installed. Modifications
682 * should be made to this rather than to @current->cred.
683 * @old is the set of credentials that are being replaces
684 * @flags contains one of the LSM_SETID_* values.
685 * Return 0 on success.
686 * @task_setpgid:
687 * Check permission before setting the process group identifier of the
688 * process @p to @pgid.
689 * @p contains the task_struct for process being modified.
690 * @pgid contains the new pgid.
691 * Return 0 if permission is granted.
692 * @task_getpgid:
693 * Check permission before getting the process group identifier of the
694 * process @p.
695 * @p contains the task_struct for the process.
696 * Return 0 if permission is granted.
697 * @task_getsid:
698 * Check permission before getting the session identifier of the process
699 * @p.
700 * @p contains the task_struct for the process.
701 * Return 0 if permission is granted.
702 * @task_getsecid:
703 * Retrieve the security identifier of the process @p.
704 * @p contains the task_struct for the process and place is into @secid.
705 * In case of failure, @secid will be set to zero.
706 *
707 * @task_setnice:
708 * Check permission before setting the nice value of @p to @nice.
709 * @p contains the task_struct of process.
710 * @nice contains the new nice value.
711 * Return 0 if permission is granted.
712 * @task_setioprio
713 * Check permission before setting the ioprio value of @p to @ioprio.
714 * @p contains the task_struct of process.
715 * @ioprio contains the new ioprio value
716 * Return 0 if permission is granted.
717 * @task_getioprio
718 * Check permission before getting the ioprio value of @p.
719 * @p contains the task_struct of process.
720 * Return 0 if permission is granted.
721 * @task_setrlimit:
722 * Check permission before setting the resource limits of the current
723 * process for @resource to @new_rlim. The old resource limit values can
724 * be examined by dereferencing (current->signal->rlim + resource).
725 * @resource contains the resource whose limit is being set.
726 * @new_rlim contains the new limits for @resource.
727 * Return 0 if permission is granted.
728 * @task_setscheduler:
729 * Check permission before setting scheduling policy and/or parameters of
730 * process @p based on @policy and @lp.
731 * @p contains the task_struct for process.
732 * @policy contains the scheduling policy.
733 * @lp contains the scheduling parameters.
734 * Return 0 if permission is granted.
735 * @task_getscheduler:
736 * Check permission before obtaining scheduling information for process
737 * @p.
738 * @p contains the task_struct for process.
739 * Return 0 if permission is granted.
740 * @task_movememory
741 * Check permission before moving memory owned by process @p.
742 * @p contains the task_struct for process.
743 * Return 0 if permission is granted.
744 * @task_kill:
745 * Check permission before sending signal @sig to @p. @info can be NULL,
746 * the constant 1, or a pointer to a siginfo structure. If @info is 1 or
747 * SI_FROMKERNEL(info) is true, then the signal should be viewed as coming
748 * from the kernel and should typically be permitted.
749 * SIGIO signals are handled separately by the send_sigiotask hook in
750 * file_security_ops.
751 * @p contains the task_struct for process.
752 * @info contains the signal information.
753 * @sig contains the signal value.
754 * @secid contains the sid of the process where the signal originated
755 * Return 0 if permission is granted.
756 * @task_wait:
757 * Check permission before allowing a process to reap a child process @p
758 * and collect its status information.
759 * @p contains the task_struct for process.
760 * Return 0 if permission is granted.
761 * @task_prctl:
762 * Check permission before performing a process control operation on the
763 * current process.
764 * @option contains the operation.
765 * @arg2 contains a argument.
766 * @arg3 contains a argument.
767 * @arg4 contains a argument.
768 * @arg5 contains a argument.
769 * Return -ENOSYS if no-one wanted to handle this op, any other value to
770 * cause prctl() to return immediately with that value.
771 * @task_to_inode:
772 * Set the security attributes for an inode based on an associated task's
773 * security attributes, e.g. for /proc/pid inodes.
774 * @p contains the task_struct for the task.
775 * @inode contains the inode structure for the inode.
776 *
777 * Security hooks for Netlink messaging.
778 *
779 * @netlink_send:
780 * Save security information for a netlink message so that permission
781 * checking can be performed when the message is processed. The security
782 * information can be saved using the eff_cap field of the
783 * netlink_skb_parms structure. Also may be used to provide fine
784 * grained control over message transmission.
785 * @sk associated sock of task sending the message.,
786 * @skb contains the sk_buff structure for the netlink message.
787 * Return 0 if the information was successfully saved and message
788 * is allowed to be transmitted.
789 * @netlink_recv:
790 * Check permission before processing the received netlink message in
791 * @skb.
792 * @skb contains the sk_buff structure for the netlink message.
793 * @cap indicates the capability required
794 * Return 0 if permission is granted.
795 *
796 * Security hooks for Unix domain networking.
797 *
798 * @unix_stream_connect:
799 * Check permissions before establishing a Unix domain stream connection
800 * between @sock and @other.
801 * @sock contains the socket structure.
802 * @other contains the peer socket structure.
803 * Return 0 if permission is granted.
804 * @unix_may_send:
805 * Check permissions before connecting or sending datagrams from @sock to
806 * @other.
807 * @sock contains the socket structure.
808 * @sock contains the peer socket structure.
809 * Return 0 if permission is granted.
810 *
811 * The @unix_stream_connect and @unix_may_send hooks were necessary because
812 * Linux provides an alternative to the conventional file name space for Unix
813 * domain sockets. Whereas binding and connecting to sockets in the file name
814 * space is mediated by the typical file permissions (and caught by the mknod
815 * and permission hooks in inode_security_ops), binding and connecting to
816 * sockets in the abstract name space is completely unmediated. Sufficient
817 * control of Unix domain sockets in the abstract name space isn't possible
818 * using only the socket layer hooks, since we need to know the actual target
819 * socket, which is not looked up until we are inside the af_unix code.
820 *
821 * Security hooks for socket operations.
822 *
823 * @socket_create:
824 * Check permissions prior to creating a new socket.
825 * @family contains the requested protocol family.
826 * @type contains the requested communications type.
827 * @protocol contains the requested protocol.
828 * @kern set to 1 if a kernel socket.
829 * Return 0 if permission is granted.
830 * @socket_post_create:
831 * This hook allows a module to update or allocate a per-socket security
832 * structure. Note that the security field was not added directly to the
833 * socket structure, but rather, the socket security information is stored
834 * in the associated inode. Typically, the inode alloc_security hook will
835 * allocate and and attach security information to
836 * sock->inode->i_security. This hook may be used to update the
837 * sock->inode->i_security field with additional information that wasn't
838 * available when the inode was allocated.
839 * @sock contains the newly created socket structure.
840 * @family contains the requested protocol family.
841 * @type contains the requested communications type.
842 * @protocol contains the requested protocol.
843 * @kern set to 1 if a kernel socket.
844 * @socket_bind:
845 * Check permission before socket protocol layer bind operation is
846 * performed and the socket @sock is bound to the address specified in the
847 * @address parameter.
848 * @sock contains the socket structure.
849 * @address contains the address to bind to.
850 * @addrlen contains the length of address.
851 * Return 0 if permission is granted.
852 * @socket_connect:
853 * Check permission before socket protocol layer connect operation
854 * attempts to connect socket @sock to a remote address, @address.
855 * @sock contains the socket structure.
856 * @address contains the address of remote endpoint.
857 * @addrlen contains the length of address.
858 * Return 0 if permission is granted.
859 * @socket_listen:
860 * Check permission before socket protocol layer listen operation.
861 * @sock contains the socket structure.
862 * @backlog contains the maximum length for the pending connection queue.
863 * Return 0 if permission is granted.
864 * @socket_accept:
865 * Check permission before accepting a new connection. Note that the new
866 * socket, @newsock, has been created and some information copied to it,
867 * but the accept operation has not actually been performed.
868 * @sock contains the listening socket structure.
869 * @newsock contains the newly created server socket for connection.
870 * Return 0 if permission is granted.
871 * @socket_sendmsg:
872 * Check permission before transmitting a message to another socket.
873 * @sock contains the socket structure.
874 * @msg contains the message to be transmitted.
875 * @size contains the size of message.
876 * Return 0 if permission is granted.
877 * @socket_recvmsg:
878 * Check permission before receiving a message from a socket.
879 * @sock contains the socket structure.
880 * @msg contains the message structure.
881 * @size contains the size of message structure.
882 * @flags contains the operational flags.
883 * Return 0 if permission is granted.
884 * @socket_getsockname:
885 * Check permission before the local address (name) of the socket object
886 * @sock is retrieved.
887 * @sock contains the socket structure.
888 * Return 0 if permission is granted.
889 * @socket_getpeername:
890 * Check permission before the remote address (name) of a socket object
891 * @sock is retrieved.
892 * @sock contains the socket structure.
893 * Return 0 if permission is granted.
894 * @socket_getsockopt:
895 * Check permissions before retrieving the options associated with socket
896 * @sock.
897 * @sock contains the socket structure.
898 * @level contains the protocol level to retrieve option from.
899 * @optname contains the name of option to retrieve.
900 * Return 0 if permission is granted.
901 * @socket_setsockopt:
902 * Check permissions before setting the options associated with socket
903 * @sock.
904 * @sock contains the socket structure.
905 * @level contains the protocol level to set options for.
906 * @optname contains the name of the option to set.
907 * Return 0 if permission is granted.
908 * @socket_shutdown:
909 * Checks permission before all or part of a connection on the socket
910 * @sock is shut down.
911 * @sock contains the socket structure.
912 * @how contains the flag indicating how future sends and receives are handled.
913 * Return 0 if permission is granted.
914 * @socket_sock_rcv_skb:
915 * Check permissions on incoming network packets. This hook is distinct
916 * from Netfilter's IP input hooks since it is the first time that the
917 * incoming sk_buff @skb has been associated with a particular socket, @sk.
918 * Must not sleep inside this hook because some callers hold spinlocks.
919 * @sk contains the sock (not socket) associated with the incoming sk_buff.
920 * @skb contains the incoming network data.
921 * @socket_getpeersec_stream:
922 * This hook allows the security module to provide peer socket security
923 * state for unix or connected tcp sockets to userspace via getsockopt
924 * SO_GETPEERSEC. For tcp sockets this can be meaningful if the
925 * socket is associated with an ipsec SA.
926 * @sock is the local socket.
927 * @optval userspace memory where the security state is to be copied.
928 * @optlen userspace int where the module should copy the actual length
929 * of the security state.
930 * @len as input is the maximum length to copy to userspace provided
931 * by the caller.
932 * Return 0 if all is well, otherwise, typical getsockopt return
933 * values.
934 * @socket_getpeersec_dgram:
935 * This hook allows the security module to provide peer socket security
936 * state for udp sockets on a per-packet basis to userspace via
937 * getsockopt SO_GETPEERSEC. The application must first have indicated
938 * the IP_PASSSEC option via getsockopt. It can then retrieve the
939 * security state returned by this hook for a packet via the SCM_SECURITY
940 * ancillary message type.
941 * @skb is the skbuff for the packet being queried
942 * @secdata is a pointer to a buffer in which to copy the security data
943 * @seclen is the maximum length for @secdata
944 * Return 0 on success, error on failure.
945 * @sk_alloc_security:
946 * Allocate and attach a security structure to the sk->sk_security field,
947 * which is used to copy security attributes between local stream sockets.
948 * @sk_free_security:
949 * Deallocate security structure.
950 * @sk_clone_security:
951 * Clone/copy security structure.
952 * @sk_getsecid:
953 * Retrieve the LSM-specific secid for the sock to enable caching of network
954 * authorizations.
955 * @sock_graft:
956 * Sets the socket's isec sid to the sock's sid.
957 * @inet_conn_request:
958 * Sets the openreq's sid to socket's sid with MLS portion taken from peer sid.
959 * @inet_csk_clone:
960 * Sets the new child socket's sid to the openreq sid.
961 * @inet_conn_established:
962 * Sets the connection's peersid to the secmark on skb.
963 * @req_classify_flow:
964 * Sets the flow's sid to the openreq sid.
965 * @tun_dev_create:
966 * Check permissions prior to creating a new TUN device.
967 * @tun_dev_post_create:
968 * This hook allows a module to update or allocate a per-socket security
969 * structure.
970 * @sk contains the newly created sock structure.
971 * @tun_dev_attach:
972 * Check permissions prior to attaching to a persistent TUN device. This
973 * hook can also be used by the module to update any security state
974 * associated with the TUN device's sock structure.
975 * @sk contains the existing sock structure.
976 *
977 * Security hooks for XFRM operations.
978 *
979 * @xfrm_policy_alloc_security:
980 * @ctxp is a pointer to the xfrm_sec_ctx being added to Security Policy
981 * Database used by the XFRM system.
982 * @sec_ctx contains the security context information being provided by
983 * the user-level policy update program (e.g., setkey).
984 * Allocate a security structure to the xp->security field; the security
985 * field is initialized to NULL when the xfrm_policy is allocated.
986 * Return 0 if operation was successful (memory to allocate, legal context)
987 * @xfrm_policy_clone_security:
988 * @old_ctx contains an existing xfrm_sec_ctx.
989 * @new_ctxp contains a new xfrm_sec_ctx being cloned from old.
990 * Allocate a security structure in new_ctxp that contains the
991 * information from the old_ctx structure.
992 * Return 0 if operation was successful (memory to allocate).
993 * @xfrm_policy_free_security:
994 * @ctx contains the xfrm_sec_ctx
995 * Deallocate xp->security.
996 * @xfrm_policy_delete_security:
997 * @ctx contains the xfrm_sec_ctx.
998 * Authorize deletion of xp->security.
999 * @xfrm_state_alloc_security:
1000 * @x contains the xfrm_state being added to the Security Association
1001 * Database by the XFRM system.
1002 * @sec_ctx contains the security context information being provided by
1003 * the user-level SA generation program (e.g., setkey or racoon).
1004 * @secid contains the secid from which to take the mls portion of the context.
1005 * Allocate a security structure to the x->security field; the security
1006 * field is initialized to NULL when the xfrm_state is allocated. Set the
1007 * context to correspond to either sec_ctx or polsec, with the mls portion
1008 * taken from secid in the latter case.
1009 * Return 0 if operation was successful (memory to allocate, legal context).
1010 * @xfrm_state_free_security:
1011 * @x contains the xfrm_state.
1012 * Deallocate x->security.
1013 * @xfrm_state_delete_security:
1014 * @x contains the xfrm_state.
1015 * Authorize deletion of x->security.
1016 * @xfrm_policy_lookup:
1017 * @ctx contains the xfrm_sec_ctx for which the access control is being
1018 * checked.
1019 * @fl_secid contains the flow security label that is used to authorize
1020 * access to the policy xp.
1021 * @dir contains the direction of the flow (input or output).
1022 * Check permission when a flow selects a xfrm_policy for processing
1023 * XFRMs on a packet. The hook is called when selecting either a
1024 * per-socket policy or a generic xfrm policy.
1025 * Return 0 if permission is granted, -ESRCH otherwise, or -errno
1026 * on other errors.
1027 * @xfrm_state_pol_flow_match:
1028 * @x contains the state to match.
1029 * @xp contains the policy to check for a match.
1030 * @fl contains the flow to check for a match.
1031 * Return 1 if there is a match.
1032 * @xfrm_decode_session:
1033 * @skb points to skb to decode.
1034 * @secid points to the flow key secid to set.
1035 * @ckall says if all xfrms used should be checked for same secid.
1036 * Return 0 if ckall is zero or all xfrms used have the same secid.
1037 *
1038 * Security hooks affecting all Key Management operations
1039 *
1040 * @key_alloc:
1041 * Permit allocation of a key and assign security data. Note that key does
1042 * not have a serial number assigned at this point.
1043 * @key points to the key.
1044 * @flags is the allocation flags
1045 * Return 0 if permission is granted, -ve error otherwise.
1046 * @key_free:
1047 * Notification of destruction; free security data.
1048 * @key points to the key.
1049 * No return value.
1050 * @key_permission:
1051 * See whether a specific operational right is granted to a process on a
1052 * key.
1053 * @key_ref refers to the key (key pointer + possession attribute bit).
1054 * @cred points to the credentials to provide the context against which to
1055 * evaluate the security data on the key.
1056 * @perm describes the combination of permissions required of this key.
1057 * Return 1 if permission granted, 0 if permission denied and -ve it the
1058 * normal permissions model should be effected.
1059 * @key_getsecurity:
1060 * Get a textual representation of the security context attached to a key
1061 * for the purposes of honouring KEYCTL_GETSECURITY. This function
1062 * allocates the storage for the NUL-terminated string and the caller
1063 * should free it.
1064 * @key points to the key to be queried.
1065 * @_buffer points to a pointer that should be set to point to the
1066 * resulting string (if no label or an error occurs).
1067 * Return the length of the string (including terminating NUL) or -ve if
1068 * an error.
1069 * May also return 0 (and a NULL buffer pointer) if there is no label.
1070 *
1071 * Security hooks affecting all System V IPC operations.
1072 *
1073 * @ipc_permission:
1074 * Check permissions for access to IPC
1075 * @ipcp contains the kernel IPC permission structure
1076 * @flag contains the desired (requested) permission set
1077 * Return 0 if permission is granted.
1078 * @ipc_getsecid:
1079 * Get the secid associated with the ipc object.
1080 * @ipcp contains the kernel IPC permission structure.
1081 * @secid contains a pointer to the location where result will be saved.
1082 * In case of failure, @secid will be set to zero.
1083 *
1084 * Security hooks for individual messages held in System V IPC message queues
1085 * @msg_msg_alloc_security:
1086 * Allocate and attach a security structure to the msg->security field.
1087 * The security field is initialized to NULL when the structure is first
1088 * created.
1089 * @msg contains the message structure to be modified.
1090 * Return 0 if operation was successful and permission is granted.
1091 * @msg_msg_free_security:
1092 * Deallocate the security structure for this message.
1093 * @msg contains the message structure to be modified.
1094 *
1095 * Security hooks for System V IPC Message Queues
1096 *
1097 * @msg_queue_alloc_security:
1098 * Allocate and attach a security structure to the
1099 * msq->q_perm.security field. The security field is initialized to
1100 * NULL when the structure is first created.
1101 * @msq contains the message queue structure to be modified.
1102 * Return 0 if operation was successful and permission is granted.
1103 * @msg_queue_free_security:
1104 * Deallocate security structure for this message queue.
1105 * @msq contains the message queue structure to be modified.
1106 * @msg_queue_associate:
1107 * Check permission when a message queue is requested through the
1108 * msgget system call. This hook is only called when returning the
1109 * message queue identifier for an existing message queue, not when a
1110 * new message queue is created.
1111 * @msq contains the message queue to act upon.
1112 * @msqflg contains the operation control flags.
1113 * Return 0 if permission is granted.
1114 * @msg_queue_msgctl:
1115 * Check permission when a message control operation specified by @cmd
1116 * is to be performed on the message queue @msq.
1117 * The @msq may be NULL, e.g. for IPC_INFO or MSG_INFO.
1118 * @msq contains the message queue to act upon. May be NULL.
1119 * @cmd contains the operation to be performed.
1120 * Return 0 if permission is granted.
1121 * @msg_queue_msgsnd:
1122 * Check permission before a message, @msg, is enqueued on the message
1123 * queue, @msq.
1124 * @msq contains the message queue to send message to.
1125 * @msg contains the message to be enqueued.
1126 * @msqflg contains operational flags.
1127 * Return 0 if permission is granted.
1128 * @msg_queue_msgrcv:
1129 * Check permission before a message, @msg, is removed from the message
1130 * queue, @msq. The @target task structure contains a pointer to the
1131 * process that will be receiving the message (not equal to the current
1132 * process when inline receives are being performed).
1133 * @msq contains the message queue to retrieve message from.
1134 * @msg contains the message destination.
1135 * @target contains the task structure for recipient process.
1136 * @type contains the type of message requested.
1137 * @mode contains the operational flags.
1138 * Return 0 if permission is granted.
1139 *
1140 * Security hooks for System V Shared Memory Segments
1141 *
1142 * @shm_alloc_security:
1143 * Allocate and attach a security structure to the shp->shm_perm.security
1144 * field. The security field is initialized to NULL when the structure is
1145 * first created.
1146 * @shp contains the shared memory structure to be modified.
1147 * Return 0 if operation was successful and permission is granted.
1148 * @shm_free_security:
1149 * Deallocate the security struct for this memory segment.
1150 * @shp contains the shared memory structure to be modified.
1151 * @shm_associate:
1152 * Check permission when a shared memory region is requested through the
1153 * shmget system call. This hook is only called when returning the shared
1154 * memory region identifier for an existing region, not when a new shared
1155 * memory region is created.
1156 * @shp contains the shared memory structure to be modified.
1157 * @shmflg contains the operation control flags.
1158 * Return 0 if permission is granted.
1159 * @shm_shmctl:
1160 * Check permission when a shared memory control operation specified by
1161 * @cmd is to be performed on the shared memory region @shp.
1162 * The @shp may be NULL, e.g. for IPC_INFO or SHM_INFO.
1163 * @shp contains shared memory structure to be modified.
1164 * @cmd contains the operation to be performed.
1165 * Return 0 if permission is granted.
1166 * @shm_shmat:
1167 * Check permissions prior to allowing the shmat system call to attach the
1168 * shared memory segment @shp to the data segment of the calling process.
1169 * The attaching address is specified by @shmaddr.
1170 * @shp contains the shared memory structure to be modified.
1171 * @shmaddr contains the address to attach memory region to.
1172 * @shmflg contains the operational flags.
1173 * Return 0 if permission is granted.
1174 *
1175 * Security hooks for System V Semaphores
1176 *
1177 * @sem_alloc_security:
1178 * Allocate and attach a security structure to the sma->sem_perm.security
1179 * field. The security field is initialized to NULL when the structure is
1180 * first created.
1181 * @sma contains the semaphore structure
1182 * Return 0 if operation was successful and permission is granted.
1183 * @sem_free_security:
1184 * deallocate security struct for this semaphore
1185 * @sma contains the semaphore structure.
1186 * @sem_associate:
1187 * Check permission when a semaphore is requested through the semget
1188 * system call. This hook is only called when returning the semaphore
1189 * identifier for an existing semaphore, not when a new one must be
1190 * created.
1191 * @sma contains the semaphore structure.
1192 * @semflg contains the operation control flags.
1193 * Return 0 if permission is granted.
1194 * @sem_semctl:
1195 * Check permission when a semaphore operation specified by @cmd is to be
1196 * performed on the semaphore @sma. The @sma may be NULL, e.g. for
1197 * IPC_INFO or SEM_INFO.
1198 * @sma contains the semaphore structure. May be NULL.
1199 * @cmd contains the operation to be performed.
1200 * Return 0 if permission is granted.
1201 * @sem_semop
1202 * Check permissions before performing operations on members of the
1203 * semaphore set @sma. If the @alter flag is nonzero, the semaphore set
1204 * may be modified.
1205 * @sma contains the semaphore structure.
1206 * @sops contains the operations to perform.
1207 * @nsops contains the number of operations to perform.
1208 * @alter contains the flag indicating whether changes are to be made.
1209 * Return 0 if permission is granted.
1210 *
1211 * @ptrace_access_check:
1212 * Check permission before allowing the current process to trace the
1213 * @child process.
1214 * Security modules may also want to perform a process tracing check
1215 * during an execve in the set_security or apply_creds hooks of
1216 * tracing check during an execve in the bprm_set_creds hook of
1217 * binprm_security_ops if the process is being traced and its security
1218 * attributes would be changed by the execve.
1219 * @child contains the task_struct structure for the target process.
1220 * @mode contains the PTRACE_MODE flags indicating the form of access.
1221 * Return 0 if permission is granted.
1222 * @ptrace_traceme:
1223 * Check that the @parent process has sufficient permission to trace the
1224 * current process before allowing the current process to present itself
1225 * to the @parent process for tracing.
1226 * The parent process will still have to undergo the ptrace_access_check
1227 * checks before it is allowed to trace this one.
1228 * @parent contains the task_struct structure for debugger process.
1229 * Return 0 if permission is granted.
1230 * @capget:
1231 * Get the @effective, @inheritable, and @permitted capability sets for
1232 * the @target process. The hook may also perform permission checking to
1233 * determine if the current process is allowed to see the capability sets
1234 * of the @target process.
1235 * @target contains the task_struct structure for target process.
1236 * @effective contains the effective capability set.
1237 * @inheritable contains the inheritable capability set.
1238 * @permitted contains the permitted capability set.
1239 * Return 0 if the capability sets were successfully obtained.
1240 * @capset:
1241 * Set the @effective, @inheritable, and @permitted capability sets for
1242 * the current process.
1243 * @new contains the new credentials structure for target process.
1244 * @old contains the current credentials structure for target process.
1245 * @effective contains the effective capability set.
1246 * @inheritable contains the inheritable capability set.
1247 * @permitted contains the permitted capability set.
1248 * Return 0 and update @new if permission is granted.
1249 * @capable:
1250 * Check whether the @tsk process has the @cap capability in the indicated
1251 * credentials.
1252 * @tsk contains the task_struct for the process.
1253 * @cred contains the credentials to use.
1254 * @cap contains the capability <include/linux/capability.h>.
1255 * @audit: Whether to write an audit message or not
1256 * Return 0 if the capability is granted for @tsk.
1257 * @sysctl:
1258 * Check permission before accessing the @table sysctl variable in the
1259 * manner specified by @op.
1260 * @table contains the ctl_table structure for the sysctl variable.
1261 * @op contains the operation (001 = search, 002 = write, 004 = read).
1262 * Return 0 if permission is granted.
1263 * @syslog:
1264 * Check permission before accessing the kernel message ring or changing
1265 * logging to the console.
1266 * See the syslog(2) manual page for an explanation of the @type values.
1267 * @type contains the type of action.
1268 * @from_file indicates the context of action (if it came from /proc).
1269 * Return 0 if permission is granted.
1270 * @settime:
1271 * Check permission to change the system time.
1272 * struct timespec and timezone are defined in include/linux/time.h
1273 * @ts contains new time
1274 * @tz contains new timezone
1275 * Return 0 if permission is granted.
1276 * @vm_enough_memory:
1277 * Check permissions for allocating a new virtual mapping.
1278 * @mm contains the mm struct it is being added to.
1279 * @pages contains the number of pages.
1280 * Return 0 if permission is granted.
1281 *
1282 * @secid_to_secctx:
1283 * Convert secid to security context.
1284 * @secid contains the security ID.
1285 * @secdata contains the pointer that stores the converted security context.
1286 * @secctx_to_secid:
1287 * Convert security context to secid.
1288 * @secid contains the pointer to the generated security ID.
1289 * @secdata contains the security context.
1290 *
1291 * @release_secctx:
1292 * Release the security context.
1293 * @secdata contains the security context.
1294 * @seclen contains the length of the security context.
1295 *
1296 * Security hooks for Audit
1297 *
1298 * @audit_rule_init:
1299 * Allocate and initialize an LSM audit rule structure.
1300 * @field contains the required Audit action. Fields flags are defined in include/linux/audit.h
1301 * @op contains the operator the rule uses.
1302 * @rulestr contains the context where the rule will be applied to.
1303 * @lsmrule contains a pointer to receive the result.
1304 * Return 0 if @lsmrule has been successfully set,
1305 * -EINVAL in case of an invalid rule.
1306 *
1307 * @audit_rule_known:
1308 * Specifies whether given @rule contains any fields related to current LSM.
1309 * @rule contains the audit rule of interest.
1310 * Return 1 in case of relation found, 0 otherwise.
1311 *
1312 * @audit_rule_match:
1313 * Determine if given @secid matches a rule previously approved
1314 * by @audit_rule_known.
1315 * @secid contains the security id in question.
1316 * @field contains the field which relates to current LSM.
1317 * @op contains the operator that will be used for matching.
1318 * @rule points to the audit rule that will be checked against.
1319 * @actx points to the audit context associated with the check.
1320 * Return 1 if secid matches the rule, 0 if it does not, -ERRNO on failure.
1321 *
1322 * @audit_rule_free:
1323 * Deallocate the LSM audit rule structure previously allocated by
1324 * audit_rule_init.
1325 * @rule contains the allocated rule
1326 *
1327 * @inode_notifysecctx:
1328 * Notify the security module of what the security context of an inode
1329 * should be. Initializes the incore security context managed by the
1330 * security module for this inode. Example usage: NFS client invokes
1331 * this hook to initialize the security context in its incore inode to the
1332 * value provided by the server for the file when the server returned the
1333 * file's attributes to the client.
1334 *
1335 * Must be called with inode->i_mutex locked.
1336 *
1337 * @inode we wish to set the security context of.
1338 * @ctx contains the string which we wish to set in the inode.
1339 * @ctxlen contains the length of @ctx.
1340 *
1341 * @inode_setsecctx:
1342 * Change the security context of an inode. Updates the
1343 * incore security context managed by the security module and invokes the
1344 * fs code as needed (via __vfs_setxattr_noperm) to update any backing
1345 * xattrs that represent the context. Example usage: NFS server invokes
1346 * this hook to change the security context in its incore inode and on the
1347 * backing filesystem to a value provided by the client on a SETATTR
1348 * operation.
1349 *
1350 * Must be called with inode->i_mutex locked.
1351 *
1352 * @dentry contains the inode we wish to set the security context of.
1353 * @ctx contains the string which we wish to set in the inode.
1354 * @ctxlen contains the length of @ctx.
1355 *
1356 * @inode_getsecctx:
1357 * Returns a string containing all relavent security context information
1358 *
1359 * @inode we wish to set the security context of.
1360 * @ctx is a pointer in which to place the allocated security context.
1361 * @ctxlen points to the place to put the length of @ctx.
1362 * This is the main security structure.
1363 */
1409 #ifdef CONFIG_SECURITY_PATH
1424 mode_t mode);
1427 #endif
1460 int (*inode_getsecurity) (const struct inode *inode, const char *name, void **buffer, bool alloc);
1461 int (*inode_setsecurity) (struct inode *inode, const char *name, const void *value, size_t size, int flags);
1490 gfp_t gfp);
1563 #ifdef CONFIG_SECURITY_NETWORK
1587 int (*socket_getpeersec_stream) (struct socket *sock, char __user *optval, int __user *optlen, unsigned len);
1604 #ifdef CONFIG_SECURITY_NETWORK_XFRM
1607 int (*xfrm_policy_clone_security) (struct xfrm_sec_ctx *old_ctx, struct xfrm_sec_ctx **new_ctx);
1612 u32 secid);
1622 /* key management security hooks */
1623 #ifdef CONFIG_KEYS
1628 key_perm_t perm);
1632 #ifdef CONFIG_AUDIT
1639 };
1641 /* prototypes */
1646 /* Security operations */
1717 int security_inode_getsecurity(const struct inode *inode, const char *name, void **buffer, bool alloc);
1718 int security_inode_setsecurity(struct inode *inode, const char *name, const void *value, size_t size, int flags);
1802 };
1805 {
1806 }
1809 {
1810 }
1812 /*
1813 * This is the default capabilities functionality. Most of these functions
1814 * are just stubbed out, but a few must call the proper capable code.
1815 */
1818 {
1820 }
1824 {
1826 }
1829 {
1831 }
1837 {
1839 }
1846 {
1848 }
1851 {
1853 }
1856 {
1863 }
1867 {
1872 SECURITY_CAP_NOAUDIT);
1875 }
1878 {
1880 }
1884 {
1886 }
1889 {
1891 }
1894 {
1896 }
1899 {
1901 }
1904 {
1907 }
1910 {
1913 }
1916 {
1917 /* If current->mm is a kernel thread then we will pass NULL,
1918 for this specific case that is fine */
1920 }
1923 {
1925 }
1928 {
1930 }
1933 {
1934 }
1937 {
1938 }
1941 {
1943 }
1946 {
1948 }
1951 { }
1954 {
1956 }
1959 {
1961 }
1965 {
1967 }
1970 {
1972 }
1977 {
1979 }
1982 {
1984 }
1988 {
1990 }
1994 {
1996 }
2000 { }
2003 {
2005 }
2008 {
2010 }
2013 { }
2020 {
2022 }
2027 {
2029 }
2034 {
2036 }
2040 {
2042 }
2047 {
2049 }
2054 {
2056 }
2060 {
2062 }
2067 {
2069 }
2075 {
2077 }
2080 {
2082 }
2086 {
2088 }
2091 {
2093 }
2097 {
2099 }
2103 {
2105 }
2109 {
2111 }
2115 { }
2119 {
2121 }
2124 {
2126 }
2130 {
2132 }
2135 {
2137 }
2140 {
2142 }
2144 static inline int security_inode_getsecurity(const struct inode *inode, const char *name, void **buffer, bool alloc)
2145 {
2147 }
2149 static inline int security_inode_setsecurity(struct inode *inode, const char *name, const void *value, size_t size, int flags)
2150 {
2152 }
2154 static inline int security_inode_listsecurity(struct inode *inode, char *buffer, size_t buffer_size)
2155 {
2157 }
2160 {
2162 }
2165 {
2167 }
2170 {
2172 }
2175 { }
2179 {
2181 }
2188 {
2190 }
2195 {
2197 }
2200 {
2202 }
2206 {
2208 }
2211 {
2213 }
2218 {
2220 }
2223 {
2225 }
2229 {
2231 }
2234 {
2236 }
2239 {
2241 }
2244 { }
2248 gfp_t gfp)
2249 {
2251 }
2255 {
2256 }
2259 {
2261 }
2265 {
2267 }
2270 {
2272 }
2277 {
2279 }
2282 {
2284 }
2287 {
2289 }
2292 {
2294 }
2297 {
2299 }
2302 {
2304 }
2307 {
2309 }
2312 {
2314 }
2318 {
2320 }
2325 {
2327 }
2330 {
2332 }
2335 {
2337 }
2341 u32 secid)
2342 {
2344 }
2347 {
2349 }
2355 {
2357 }
2360 { }
2364 {
2366 }
2369 {
2371 }
2374 {
2376 }
2379 { }
2382 {
2384 }
2387 { }
2391 {
2393 }
2396 {
2398 }
2402 {
2404 }
2410 {
2412 }
2415 {
2417 }
2420 { }
2424 {
2426 }
2429 {
2431 }
2435 {
2437 }
2440 {
2442 }
2445 { }
2448 {
2450 }
2453 {
2455 }
2460 {
2462 }
2465 { }
2468 {
2470 }
2472 static inline int security_setprocattr(struct task_struct *p, char *name, void *value, size_t size)
2473 {
2475 }
2478 {
2480 }
2483 {
2485 }
2488 {
2490 }
2493 u32 seclen,
2495 {
2497 }
2500 {
2501 }
2504 {
2506 }
2508 {
2510 }
2512 {
2514 }
2517 #ifdef CONFIG_SECURITY_NETWORK
2561 {
2563 }
2567 {
2569 }
2573 {
2575 }
2581 {
2583 }
2588 {
2590 }
2595 {
2597 }
2600 {
2602 }
2606 {
2608 }
2612 {
2614 }
2619 {
2621 }
2624 {
2626 }
2629 {
2631 }
2635 {
2637 }
2641 {
2643 }
2646 {
2648 }
2651 {
2653 }
2657 {
2659 }
2661 static inline int security_socket_getpeersec_dgram(struct socket *sock, struct sk_buff *skb, u32 *secid)
2662 {
2664 }
2667 {
2669 }
2672 {
2673 }
2676 {
2677 }
2680 {
2681 }
2683 static inline void security_req_classify_flow(const struct request_sock *req, struct flowi *fl)
2684 {
2685 }
2688 {
2689 }
2693 {
2695 }
2699 {
2700 }
2704 {
2705 }
2708 {
2710 }
2713 {
2714 }
2717 {
2719 }
2722 #ifdef CONFIG_SECURITY_NETWORK_XFRM
2741 static inline int security_xfrm_policy_alloc(struct xfrm_sec_ctx **ctxp, struct xfrm_user_sec_ctx *sec_ctx)
2742 {
2744 }
2746 static inline int security_xfrm_policy_clone(struct xfrm_sec_ctx *old, struct xfrm_sec_ctx **new_ctxp)
2747 {
2749 }
2752 {
2753 }
2756 {
2758 }
2762 {
2764 }
2768 {
2770 }
2773 {
2774 }
2777 {
2779 }
2782 {
2784 }
2788 {
2790 }
2793 {
2795 }
2798 {
2799 }
2803 #ifdef CONFIG_SECURITY_PATH
2818 mode_t mode);
2823 {
2825 }
2829 {
2831 }
2834 {
2836 }
2840 {
2842 }
2846 {
2848 }
2852 {
2854 }
2859 {
2861 }
2867 {
2869 }
2873 mode_t mode)
2874 {
2876 }
2879 {
2881 }
2884 {
2886 }
2889 #ifdef CONFIG_KEYS
2890 #ifdef CONFIG_SECURITY
2898 #else
2903 {
2905 }
2908 {
2909 }
2913 key_perm_t perm)
2914 {
2916 }
2919 {
2922 }
2924 #endif
2927 #ifdef CONFIG_AUDIT
2928 #ifdef CONFIG_SECURITY
2935 #else
2939 {
2941 }
2944 {
2946 }
2950 {
2952 }
2955 { }
2960 #ifdef CONFIG_SECURITYFS
2972 {
2974 }
2977 mode_t mode,
2981 {
2983 }
2986 {}
2988 #endif
2990 #ifdef CONFIG_SECURITY
2993 {
2995 }
2998 {
3000 }
3002 #else
3005 {
3007 }
3010 { }