2 * AppArmor security module
4 * This file contains AppArmor /sys/kernel/security/apparmor interface functions
6 * Copyright (C) 1998-2008 Novell/SUSE
7 * Copyright 2009-2010 Canonical Ltd.
9 * This program is free software; you can redistribute it and/or
10 * modify it under the terms of the GNU General Public License as
11 * published by the Free Software Foundation, version 2 of the
15 #include <linux/ctype.h>
16 #include <linux/security.h>
17 #include <linux/vmalloc.h>
18 #include <linux/init.h>
19 #include <linux/seq_file.h>
20 #include <linux/uaccess.h>
21 #include <linux/mount.h>
22 #include <linux/namei.h>
23 #include <linux/capability.h>
24 #include <linux/rcupdate.h>
26 #include <linux/poll.h>
27 #include <uapi/linux/major.h>
28 #include <uapi/linux/magic.h>
30 #include "include/apparmor.h"
31 #include "include/apparmorfs.h"
32 #include "include/audit.h"
33 #include "include/cred.h"
34 #include "include/crypto.h"
35 #include "include/ipc.h"
36 #include "include/label.h"
37 #include "include/policy.h"
38 #include "include/policy_ns.h"
39 #include "include/resource.h"
40 #include "include/policy_unpack.h"
43 * The apparmor filesystem interface used for policy load and introspection
44 * The interface is split into two main components based on their function
45 * a securityfs component:
46 * used for static files that are always available, and which allows
47 * userspace to specificy the location of the security filesystem.
49 * fns and data are prefixed with
52 * an apparmorfs component:
53 * used loaded policy content and introspection. It is not part of a
54 * regular mounted filesystem and is available only through the magic
55 * policy symlink in the root of the securityfs apparmor/ directory.
56 * Tasks queries will be magically redirected to the correct portion
57 * of the policy tree based on their confinement.
59 * fns and data are prefixed with
62 * The aa_fs_ prefix is used to indicate the fn is used by both the
63 * securityfs and apparmorfs filesystems.
72 * aa_mangle_name - mangle a profile name to std profile layout form
73 * @name: profile name to mangle (NOT NULL)
74 * @target: buffer to store mangled name, same length as @name (MAYBE NULL)
76 * Returns: length of mangled name
78 static int mangle_name(const char *name
, char *target
)
82 while (*name
== '/' || *name
== '.')
86 for (; *name
; name
++) {
89 else if (isspace(*name
))
91 else if (isalnum(*name
) || strchr("._-", *name
))
98 for (; *name
; name
++) {
99 if (isalnum(*name
) || isspace(*name
) ||
100 strchr("/._-", *name
))
112 * aafs - core fns and data for the policy tree
115 #define AAFS_NAME "apparmorfs"
116 static struct vfsmount
*aafs_mnt
;
117 static int aafs_count
;
120 static int aafs_show_path(struct seq_file
*seq
, struct dentry
*dentry
)
122 seq_printf(seq
, "%s:[%lu]", AAFS_NAME
, d_inode(dentry
)->i_ino
);
126 static void aafs_free_inode(struct inode
*inode
)
128 if (S_ISLNK(inode
->i_mode
))
129 kfree(inode
->i_link
);
130 free_inode_nonrcu(inode
);
133 static const struct super_operations aafs_super_ops
= {
134 .statfs
= simple_statfs
,
135 .free_inode
= aafs_free_inode
,
136 .show_path
= aafs_show_path
,
139 static int fill_super(struct super_block
*sb
, void *data
, int silent
)
141 static struct tree_descr files
[] = { {""} };
144 error
= simple_fill_super(sb
, AAFS_MAGIC
, files
);
147 sb
->s_op
= &aafs_super_ops
;
152 static struct dentry
*aafs_mount(struct file_system_type
*fs_type
,
153 int flags
, const char *dev_name
, void *data
)
155 return mount_single(fs_type
, flags
, data
, fill_super
);
158 static struct file_system_type aafs_ops
= {
159 .owner
= THIS_MODULE
,
162 .kill_sb
= kill_anon_super
,
166 * __aafs_setup_d_inode - basic inode setup for apparmorfs
167 * @dir: parent directory for the dentry
168 * @dentry: dentry we are seting the inode up for
169 * @mode: permissions the file should have
170 * @data: data to store on inode.i_private, available in open()
171 * @link: if symlink, symlink target string
172 * @fops: struct file_operations that should be used
173 * @iops: struct of inode_operations that should be used
175 static int __aafs_setup_d_inode(struct inode
*dir
, struct dentry
*dentry
,
176 umode_t mode
, void *data
, char *link
,
177 const struct file_operations
*fops
,
178 const struct inode_operations
*iops
)
180 struct inode
*inode
= new_inode(dir
->i_sb
);
188 inode
->i_ino
= get_next_ino();
189 inode
->i_mode
= mode
;
190 inode
->i_atime
= inode
->i_mtime
= inode
->i_ctime
= current_time(inode
);
191 inode
->i_private
= data
;
193 inode
->i_op
= iops
? iops
: &simple_dir_inode_operations
;
194 inode
->i_fop
= &simple_dir_operations
;
197 } else if (S_ISLNK(mode
)) {
198 inode
->i_op
= iops
? iops
: &simple_symlink_inode_operations
;
199 inode
->i_link
= link
;
203 d_instantiate(dentry
, inode
);
210 * aafs_create - create a dentry in the apparmorfs filesystem
212 * @name: name of dentry to create
213 * @mode: permissions the file should have
214 * @parent: parent directory for this dentry
215 * @data: data to store on inode.i_private, available in open()
216 * @link: if symlink, symlink target string
217 * @fops: struct file_operations that should be used for
218 * @iops: struct of inode_operations that should be used
220 * This is the basic "create a xxx" function for apparmorfs.
222 * Returns a pointer to a dentry if it succeeds, that must be free with
223 * aafs_remove(). Will return ERR_PTR on failure.
225 static struct dentry
*aafs_create(const char *name
, umode_t mode
,
226 struct dentry
*parent
, void *data
, void *link
,
227 const struct file_operations
*fops
,
228 const struct inode_operations
*iops
)
230 struct dentry
*dentry
;
237 if (!(mode
& S_IFMT
))
238 mode
= (mode
& S_IALLUGO
) | S_IFREG
;
240 error
= simple_pin_fs(&aafs_ops
, &aafs_mnt
, &aafs_count
);
242 return ERR_PTR(error
);
244 dir
= d_inode(parent
);
247 dentry
= lookup_one_len(name
, parent
, strlen(name
));
248 if (IS_ERR(dentry
)) {
249 error
= PTR_ERR(dentry
);
253 if (d_really_is_positive(dentry
)) {
258 error
= __aafs_setup_d_inode(dir
, dentry
, mode
, data
, link
, fops
, iops
);
270 simple_release_fs(&aafs_mnt
, &aafs_count
);
272 return ERR_PTR(error
);
276 * aafs_create_file - create a file in the apparmorfs filesystem
278 * @name: name of dentry to create
279 * @mode: permissions the file should have
280 * @parent: parent directory for this dentry
281 * @data: data to store on inode.i_private, available in open()
282 * @fops: struct file_operations that should be used for
286 static struct dentry
*aafs_create_file(const char *name
, umode_t mode
,
287 struct dentry
*parent
, void *data
,
288 const struct file_operations
*fops
)
290 return aafs_create(name
, mode
, parent
, data
, NULL
, fops
, NULL
);
294 * aafs_create_dir - create a directory in the apparmorfs filesystem
296 * @name: name of dentry to create
297 * @parent: parent directory for this dentry
301 static struct dentry
*aafs_create_dir(const char *name
, struct dentry
*parent
)
303 return aafs_create(name
, S_IFDIR
| 0755, parent
, NULL
, NULL
, NULL
,
308 * aafs_create_symlink - create a symlink in the apparmorfs filesystem
309 * @name: name of dentry to create
310 * @parent: parent directory for this dentry
311 * @target: if symlink, symlink target string
312 * @private: private data
313 * @iops: struct of inode_operations that should be used
315 * If @target parameter is %NULL, then the @iops parameter needs to be
316 * setup to handle .readlink and .get_link inode_operations.
318 static struct dentry
*aafs_create_symlink(const char *name
,
319 struct dentry
*parent
,
322 const struct inode_operations
*iops
)
329 return ERR_PTR(-ENOMEM
);
331 dent
= aafs_create(name
, S_IFLNK
| 0444, parent
, private, link
, NULL
,
340 * aafs_remove - removes a file or directory from the apparmorfs filesystem
342 * @dentry: dentry of the file/directory/symlink to removed.
344 static void aafs_remove(struct dentry
*dentry
)
348 if (!dentry
|| IS_ERR(dentry
))
351 dir
= d_inode(dentry
->d_parent
);
353 if (simple_positive(dentry
)) {
354 if (d_is_dir(dentry
))
355 simple_rmdir(dir
, dentry
);
357 simple_unlink(dir
, dentry
);
362 simple_release_fs(&aafs_mnt
, &aafs_count
);
367 * aa_fs - policy load/replace/remove
371 * aa_simple_write_to_buffer - common routine for getting policy from user
372 * @userbuf: user buffer to copy data from (NOT NULL)
373 * @alloc_size: size of user buffer (REQUIRES: @alloc_size >= @copy_size)
374 * @copy_size: size of data to copy from user buffer
375 * @pos: position write is at in the file (NOT NULL)
377 * Returns: kernel buffer containing copy of user buffer data or an
378 * ERR_PTR on failure.
380 static struct aa_loaddata
*aa_simple_write_to_buffer(const char __user
*userbuf
,
385 struct aa_loaddata
*data
;
387 AA_BUG(copy_size
> alloc_size
);
390 /* only writes from pos 0, that is complete writes */
391 return ERR_PTR(-ESPIPE
);
393 /* freed by caller to simple_write_to_buffer */
394 data
= aa_loaddata_alloc(alloc_size
);
398 data
->size
= copy_size
;
399 if (copy_from_user(data
->data
, userbuf
, copy_size
)) {
401 return ERR_PTR(-EFAULT
);
407 static ssize_t
policy_update(u32 mask
, const char __user
*buf
, size_t size
,
408 loff_t
*pos
, struct aa_ns
*ns
)
410 struct aa_loaddata
*data
;
411 struct aa_label
*label
;
414 label
= begin_current_label_crit_section();
416 /* high level check about policy management - fine grained in
419 error
= aa_may_manage_policy(label
, ns
, mask
);
423 data
= aa_simple_write_to_buffer(buf
, size
, size
, pos
);
424 error
= PTR_ERR(data
);
426 error
= aa_replace_profiles(ns
, label
, mask
, data
);
427 aa_put_loaddata(data
);
429 end_current_label_crit_section(label
);
434 /* .load file hook fn to load policy */
435 static ssize_t
profile_load(struct file
*f
, const char __user
*buf
, size_t size
,
438 struct aa_ns
*ns
= aa_get_ns(f
->f_inode
->i_private
);
439 int error
= policy_update(AA_MAY_LOAD_POLICY
, buf
, size
, pos
, ns
);
446 static const struct file_operations aa_fs_profile_load
= {
447 .write
= profile_load
,
448 .llseek
= default_llseek
,
451 /* .replace file hook fn to load and/or replace policy */
452 static ssize_t
profile_replace(struct file
*f
, const char __user
*buf
,
453 size_t size
, loff_t
*pos
)
455 struct aa_ns
*ns
= aa_get_ns(f
->f_inode
->i_private
);
456 int error
= policy_update(AA_MAY_LOAD_POLICY
| AA_MAY_REPLACE_POLICY
,
463 static const struct file_operations aa_fs_profile_replace
= {
464 .write
= profile_replace
,
465 .llseek
= default_llseek
,
468 /* .remove file hook fn to remove loaded policy */
469 static ssize_t
profile_remove(struct file
*f
, const char __user
*buf
,
470 size_t size
, loff_t
*pos
)
472 struct aa_loaddata
*data
;
473 struct aa_label
*label
;
475 struct aa_ns
*ns
= aa_get_ns(f
->f_inode
->i_private
);
477 label
= begin_current_label_crit_section();
478 /* high level check about policy management - fine grained in
481 error
= aa_may_manage_policy(label
, ns
, AA_MAY_REMOVE_POLICY
);
486 * aa_remove_profile needs a null terminated string so 1 extra
487 * byte is allocated and the copied data is null terminated.
489 data
= aa_simple_write_to_buffer(buf
, size
+ 1, size
, pos
);
491 error
= PTR_ERR(data
);
493 data
->data
[size
] = 0;
494 error
= aa_remove_profiles(ns
, label
, data
->data
, size
);
495 aa_put_loaddata(data
);
498 end_current_label_crit_section(label
);
503 static const struct file_operations aa_fs_profile_remove
= {
504 .write
= profile_remove
,
505 .llseek
= default_llseek
,
513 /* revision file hook fn for policy loads */
514 static int ns_revision_release(struct inode
*inode
, struct file
*file
)
516 struct aa_revision
*rev
= file
->private_data
;
526 static ssize_t
ns_revision_read(struct file
*file
, char __user
*buf
,
527 size_t size
, loff_t
*ppos
)
529 struct aa_revision
*rev
= file
->private_data
;
534 mutex_lock_nested(&rev
->ns
->lock
, rev
->ns
->level
);
535 last_read
= rev
->last_read
;
536 if (last_read
== rev
->ns
->revision
) {
537 mutex_unlock(&rev
->ns
->lock
);
538 if (file
->f_flags
& O_NONBLOCK
)
540 if (wait_event_interruptible(rev
->ns
->wait
,
542 READ_ONCE(rev
->ns
->revision
)))
544 mutex_lock_nested(&rev
->ns
->lock
, rev
->ns
->level
);
547 avail
= sprintf(buffer
, "%ld\n", rev
->ns
->revision
);
548 if (*ppos
+ size
> avail
) {
549 rev
->last_read
= rev
->ns
->revision
;
552 mutex_unlock(&rev
->ns
->lock
);
554 return simple_read_from_buffer(buf
, size
, ppos
, buffer
, avail
);
557 static int ns_revision_open(struct inode
*inode
, struct file
*file
)
559 struct aa_revision
*rev
= kzalloc(sizeof(*rev
), GFP_KERNEL
);
564 rev
->ns
= aa_get_ns(inode
->i_private
);
566 rev
->ns
= aa_get_current_ns();
567 file
->private_data
= rev
;
572 static __poll_t
ns_revision_poll(struct file
*file
, poll_table
*pt
)
574 struct aa_revision
*rev
= file
->private_data
;
578 mutex_lock_nested(&rev
->ns
->lock
, rev
->ns
->level
);
579 poll_wait(file
, &rev
->ns
->wait
, pt
);
580 if (rev
->last_read
< rev
->ns
->revision
)
581 mask
|= EPOLLIN
| EPOLLRDNORM
;
582 mutex_unlock(&rev
->ns
->lock
);
588 void __aa_bump_ns_revision(struct aa_ns
*ns
)
591 wake_up_interruptible(&ns
->wait
);
594 static const struct file_operations aa_fs_ns_revision_fops
= {
595 .owner
= THIS_MODULE
,
596 .open
= ns_revision_open
,
597 .poll
= ns_revision_poll
,
598 .read
= ns_revision_read
,
599 .llseek
= generic_file_llseek
,
600 .release
= ns_revision_release
,
603 static void profile_query_cb(struct aa_profile
*profile
, struct aa_perms
*perms
,
604 const char *match_str
, size_t match_len
)
606 struct aa_perms tmp
= { };
608 unsigned int state
= 0;
610 if (profile_unconfined(profile
))
612 if (profile
->file
.dfa
&& *match_str
== AA_CLASS_FILE
) {
613 dfa
= profile
->file
.dfa
;
614 state
= aa_dfa_match_len(dfa
, profile
->file
.start
,
615 match_str
+ 1, match_len
- 1);
617 struct path_cond cond
= { };
619 tmp
= aa_compute_fperms(dfa
, state
, &cond
);
621 } else if (profile
->policy
.dfa
) {
622 if (!PROFILE_MEDIATES(profile
, *match_str
))
623 return; /* no change to current perms */
624 dfa
= profile
->policy
.dfa
;
625 state
= aa_dfa_match_len(dfa
, profile
->policy
.start
[0],
626 match_str
, match_len
);
628 aa_compute_perms(dfa
, state
, &tmp
);
630 aa_apply_modes_to_perms(profile
, &tmp
);
631 aa_perms_accum_raw(perms
, &tmp
);
636 * query_data - queries a policy and writes its data to buf
637 * @buf: the resulting data is stored here (NOT NULL)
638 * @buf_len: size of buf
639 * @query: query string used to retrieve data
640 * @query_len: size of query including second NUL byte
642 * The buffers pointed to by buf and query may overlap. The query buffer is
643 * parsed before buf is written to.
645 * The query should look like "<LABEL>\0<KEY>\0", where <LABEL> is the name of
646 * the security confinement context and <KEY> is the name of the data to
647 * retrieve. <LABEL> and <KEY> must not be NUL-terminated.
649 * Don't expect the contents of buf to be preserved on failure.
651 * Returns: number of characters written to buf or -errno on failure
653 static ssize_t
query_data(char *buf
, size_t buf_len
,
654 char *query
, size_t query_len
)
659 struct aa_label
*label
, *curr
;
660 struct aa_profile
*profile
;
661 struct aa_data
*data
;
666 return -EINVAL
; /* need a query */
668 key
= query
+ strnlen(query
, query_len
) + 1;
669 if (key
+ 1 >= query
+ query_len
)
670 return -EINVAL
; /* not enough space for a non-empty key */
671 if (key
+ strnlen(key
, query
+ query_len
- key
) >= query
+ query_len
)
672 return -EINVAL
; /* must end with NUL */
674 if (buf_len
< sizeof(bytes
) + sizeof(blocks
))
675 return -EINVAL
; /* not enough space */
677 curr
= begin_current_label_crit_section();
678 label
= aa_label_parse(curr
, query
, GFP_KERNEL
, false, false);
679 end_current_label_crit_section(curr
);
681 return PTR_ERR(label
);
683 /* We are going to leave space for two numbers. The first is the total
684 * number of bytes we are writing after the first number. This is so
685 * users can read the full output without reallocation.
687 * The second number is the number of data blocks we're writing. An
688 * application might be confined by multiple policies having data in
691 memset(buf
, 0, sizeof(bytes
) + sizeof(blocks
));
692 out
= buf
+ sizeof(bytes
) + sizeof(blocks
);
695 label_for_each_confined(i
, label
, profile
) {
699 data
= rhashtable_lookup_fast(profile
->data
, &key
,
703 if (out
+ sizeof(outle32
) + data
->size
> buf
+
706 return -EINVAL
; /* not enough space */
708 outle32
= __cpu_to_le32(data
->size
);
709 memcpy(out
, &outle32
, sizeof(outle32
));
710 out
+= sizeof(outle32
);
711 memcpy(out
, data
->data
, data
->size
);
718 outle32
= __cpu_to_le32(out
- buf
- sizeof(bytes
));
719 memcpy(buf
, &outle32
, sizeof(outle32
));
720 outle32
= __cpu_to_le32(blocks
);
721 memcpy(buf
+ sizeof(bytes
), &outle32
, sizeof(outle32
));
727 * query_label - queries a label and writes permissions to buf
728 * @buf: the resulting permissions string is stored here (NOT NULL)
729 * @buf_len: size of buf
730 * @query: binary query string to match against the dfa
731 * @query_len: size of query
732 * @view_only: only compute for querier's view
734 * The buffers pointed to by buf and query may overlap. The query buffer is
735 * parsed before buf is written to.
737 * The query should look like "LABEL_NAME\0DFA_STRING" where LABEL_NAME is
738 * the name of the label, in the current namespace, that is to be queried and
739 * DFA_STRING is a binary string to match against the label(s)'s DFA.
741 * LABEL_NAME must be NUL terminated. DFA_STRING may contain NUL characters
742 * but must *not* be NUL terminated.
744 * Returns: number of characters written to buf or -errno on failure
746 static ssize_t
query_label(char *buf
, size_t buf_len
,
747 char *query
, size_t query_len
, bool view_only
)
749 struct aa_profile
*profile
;
750 struct aa_label
*label
, *curr
;
751 char *label_name
, *match_str
;
752 size_t label_name_len
, match_len
;
753 struct aa_perms perms
;
760 label_name_len
= strnlen(query
, query_len
);
761 if (!label_name_len
|| label_name_len
== query_len
)
765 * The extra byte is to account for the null byte between the
766 * profile name and dfa string. profile_name_len is greater
767 * than zero and less than query_len, so a byte can be safely
768 * added or subtracted.
770 match_str
= label_name
+ label_name_len
+ 1;
771 match_len
= query_len
- label_name_len
- 1;
773 curr
= begin_current_label_crit_section();
774 label
= aa_label_parse(curr
, label_name
, GFP_KERNEL
, false, false);
775 end_current_label_crit_section(curr
);
777 return PTR_ERR(label
);
781 label_for_each_in_ns(i
, labels_ns(label
), label
, profile
) {
782 profile_query_cb(profile
, &perms
, match_str
, match_len
);
785 label_for_each(i
, label
, profile
) {
786 profile_query_cb(profile
, &perms
, match_str
, match_len
);
791 return scnprintf(buf
, buf_len
,
792 "allow 0x%08x\ndeny 0x%08x\naudit 0x%08x\nquiet 0x%08x\n",
793 perms
.allow
, perms
.deny
, perms
.audit
, perms
.quiet
);
797 * Transaction based IO.
798 * The file expects a write which triggers the transaction, and then
799 * possibly a read(s) which collects the result - which is stored in a
800 * file-local buffer. Once a new write is performed, a new set of results
801 * are stored in the file-local buffer.
803 struct multi_transaction
{
809 #define MULTI_TRANSACTION_LIMIT (PAGE_SIZE - sizeof(struct multi_transaction))
810 /* TODO: replace with per file lock */
811 static DEFINE_SPINLOCK(multi_transaction_lock
);
813 static void multi_transaction_kref(struct kref
*kref
)
815 struct multi_transaction
*t
;
817 t
= container_of(kref
, struct multi_transaction
, count
);
818 free_page((unsigned long) t
);
821 static struct multi_transaction
*
822 get_multi_transaction(struct multi_transaction
*t
)
825 kref_get(&(t
->count
));
830 static void put_multi_transaction(struct multi_transaction
*t
)
833 kref_put(&(t
->count
), multi_transaction_kref
);
836 /* does not increment @new's count */
837 static void multi_transaction_set(struct file
*file
,
838 struct multi_transaction
*new, size_t n
)
840 struct multi_transaction
*old
;
842 AA_BUG(n
> MULTI_TRANSACTION_LIMIT
);
845 spin_lock(&multi_transaction_lock
);
846 old
= (struct multi_transaction
*) file
->private_data
;
847 file
->private_data
= new;
848 spin_unlock(&multi_transaction_lock
);
849 put_multi_transaction(old
);
852 static struct multi_transaction
*multi_transaction_new(struct file
*file
,
853 const char __user
*buf
,
856 struct multi_transaction
*t
;
858 if (size
> MULTI_TRANSACTION_LIMIT
- 1)
859 return ERR_PTR(-EFBIG
);
861 t
= (struct multi_transaction
*)get_zeroed_page(GFP_KERNEL
);
863 return ERR_PTR(-ENOMEM
);
864 kref_init(&t
->count
);
865 if (copy_from_user(t
->data
, buf
, size
))
866 return ERR_PTR(-EFAULT
);
871 static ssize_t
multi_transaction_read(struct file
*file
, char __user
*buf
,
872 size_t size
, loff_t
*pos
)
874 struct multi_transaction
*t
;
877 spin_lock(&multi_transaction_lock
);
878 t
= get_multi_transaction(file
->private_data
);
879 spin_unlock(&multi_transaction_lock
);
883 ret
= simple_read_from_buffer(buf
, size
, pos
, t
->data
, t
->size
);
884 put_multi_transaction(t
);
889 static int multi_transaction_release(struct inode
*inode
, struct file
*file
)
891 put_multi_transaction(file
->private_data
);
896 #define QUERY_CMD_LABEL "label\0"
897 #define QUERY_CMD_LABEL_LEN 6
898 #define QUERY_CMD_PROFILE "profile\0"
899 #define QUERY_CMD_PROFILE_LEN 8
900 #define QUERY_CMD_LABELALL "labelall\0"
901 #define QUERY_CMD_LABELALL_LEN 9
902 #define QUERY_CMD_DATA "data\0"
903 #define QUERY_CMD_DATA_LEN 5
906 * aa_write_access - generic permissions and data query
907 * @file: pointer to open apparmorfs/access file
908 * @ubuf: user buffer containing the complete query string (NOT NULL)
909 * @count: size of ubuf
910 * @ppos: position in the file (MUST BE ZERO)
912 * Allows for one permissions or data query per open(), write(), and read()
913 * sequence. The only queries currently supported are label-based queries for
914 * permissions or data.
916 * For permissions queries, ubuf must begin with "label\0", followed by the
917 * profile query specific format described in the query_label() function
920 * For data queries, ubuf must have the form "data\0<LABEL>\0<KEY>\0", where
921 * <LABEL> is the name of the security confinement context and <KEY> is the
922 * name of the data to retrieve.
924 * Returns: number of bytes written or -errno on failure
926 static ssize_t
aa_write_access(struct file
*file
, const char __user
*ubuf
,
927 size_t count
, loff_t
*ppos
)
929 struct multi_transaction
*t
;
935 t
= multi_transaction_new(file
, ubuf
, count
);
939 if (count
> QUERY_CMD_PROFILE_LEN
&&
940 !memcmp(t
->data
, QUERY_CMD_PROFILE
, QUERY_CMD_PROFILE_LEN
)) {
941 len
= query_label(t
->data
, MULTI_TRANSACTION_LIMIT
,
942 t
->data
+ QUERY_CMD_PROFILE_LEN
,
943 count
- QUERY_CMD_PROFILE_LEN
, true);
944 } else if (count
> QUERY_CMD_LABEL_LEN
&&
945 !memcmp(t
->data
, QUERY_CMD_LABEL
, QUERY_CMD_LABEL_LEN
)) {
946 len
= query_label(t
->data
, MULTI_TRANSACTION_LIMIT
,
947 t
->data
+ QUERY_CMD_LABEL_LEN
,
948 count
- QUERY_CMD_LABEL_LEN
, true);
949 } else if (count
> QUERY_CMD_LABELALL_LEN
&&
950 !memcmp(t
->data
, QUERY_CMD_LABELALL
,
951 QUERY_CMD_LABELALL_LEN
)) {
952 len
= query_label(t
->data
, MULTI_TRANSACTION_LIMIT
,
953 t
->data
+ QUERY_CMD_LABELALL_LEN
,
954 count
- QUERY_CMD_LABELALL_LEN
, false);
955 } else if (count
> QUERY_CMD_DATA_LEN
&&
956 !memcmp(t
->data
, QUERY_CMD_DATA
, QUERY_CMD_DATA_LEN
)) {
957 len
= query_data(t
->data
, MULTI_TRANSACTION_LIMIT
,
958 t
->data
+ QUERY_CMD_DATA_LEN
,
959 count
- QUERY_CMD_DATA_LEN
);
964 put_multi_transaction(t
);
968 multi_transaction_set(file
, t
, len
);
973 static const struct file_operations aa_sfs_access
= {
974 .write
= aa_write_access
,
975 .read
= multi_transaction_read
,
976 .release
= multi_transaction_release
,
977 .llseek
= generic_file_llseek
,
980 static int aa_sfs_seq_show(struct seq_file
*seq
, void *v
)
982 struct aa_sfs_entry
*fs_file
= seq
->private;
987 switch (fs_file
->v_type
) {
988 case AA_SFS_TYPE_BOOLEAN
:
989 seq_printf(seq
, "%s\n", fs_file
->v
.boolean
? "yes" : "no");
991 case AA_SFS_TYPE_STRING
:
992 seq_printf(seq
, "%s\n", fs_file
->v
.string
);
994 case AA_SFS_TYPE_U64
:
995 seq_printf(seq
, "%#08lx\n", fs_file
->v
.u64
);
998 /* Ignore unpritable entry types. */
1005 static int aa_sfs_seq_open(struct inode
*inode
, struct file
*file
)
1007 return single_open(file
, aa_sfs_seq_show
, inode
->i_private
);
1010 const struct file_operations aa_sfs_seq_file_ops
= {
1011 .owner
= THIS_MODULE
,
1012 .open
= aa_sfs_seq_open
,
1014 .llseek
= seq_lseek
,
1015 .release
= single_release
,
1019 * profile based file operations
1020 * policy/profiles/XXXX/profiles/ *
1023 #define SEQ_PROFILE_FOPS(NAME) \
1024 static int seq_profile_ ##NAME ##_open(struct inode *inode, struct file *file)\
1026 return seq_profile_open(inode, file, seq_profile_ ##NAME ##_show); \
1029 static const struct file_operations seq_profile_ ##NAME ##_fops = { \
1030 .owner = THIS_MODULE, \
1031 .open = seq_profile_ ##NAME ##_open, \
1033 .llseek = seq_lseek, \
1034 .release = seq_profile_release, \
1037 static int seq_profile_open(struct inode *inode, struct file *file,
1038 int (*show
)(struct seq_file
*, void *))
1040 struct aa_proxy
*proxy
= aa_get_proxy(inode
->i_private
);
1041 int error
= single_open(file
, show
, proxy
);
1044 file
->private_data
= NULL
;
1045 aa_put_proxy(proxy
);
1051 static int seq_profile_release(struct inode
*inode
, struct file
*file
)
1053 struct seq_file
*seq
= (struct seq_file
*) file
->private_data
;
1055 aa_put_proxy(seq
->private);
1056 return single_release(inode
, file
);
1059 static int seq_profile_name_show(struct seq_file
*seq
, void *v
)
1061 struct aa_proxy
*proxy
= seq
->private;
1062 struct aa_label
*label
= aa_get_label_rcu(&proxy
->label
);
1063 struct aa_profile
*profile
= labels_profile(label
);
1064 seq_printf(seq
, "%s\n", profile
->base
.name
);
1065 aa_put_label(label
);
1070 static int seq_profile_mode_show(struct seq_file
*seq
, void *v
)
1072 struct aa_proxy
*proxy
= seq
->private;
1073 struct aa_label
*label
= aa_get_label_rcu(&proxy
->label
);
1074 struct aa_profile
*profile
= labels_profile(label
);
1075 seq_printf(seq
, "%s\n", aa_profile_mode_names
[profile
->mode
]);
1076 aa_put_label(label
);
1081 static int seq_profile_attach_show(struct seq_file
*seq
, void *v
)
1083 struct aa_proxy
*proxy
= seq
->private;
1084 struct aa_label
*label
= aa_get_label_rcu(&proxy
->label
);
1085 struct aa_profile
*profile
= labels_profile(label
);
1086 if (profile
->attach
)
1087 seq_printf(seq
, "%s\n", profile
->attach
);
1088 else if (profile
->xmatch
)
1089 seq_puts(seq
, "<unknown>\n");
1091 seq_printf(seq
, "%s\n", profile
->base
.name
);
1092 aa_put_label(label
);
1097 static int seq_profile_hash_show(struct seq_file
*seq
, void *v
)
1099 struct aa_proxy
*proxy
= seq
->private;
1100 struct aa_label
*label
= aa_get_label_rcu(&proxy
->label
);
1101 struct aa_profile
*profile
= labels_profile(label
);
1102 unsigned int i
, size
= aa_hash_size();
1104 if (profile
->hash
) {
1105 for (i
= 0; i
< size
; i
++)
1106 seq_printf(seq
, "%.2x", profile
->hash
[i
]);
1107 seq_putc(seq
, '\n');
1109 aa_put_label(label
);
1114 SEQ_PROFILE_FOPS(name
);
1115 SEQ_PROFILE_FOPS(mode
);
1116 SEQ_PROFILE_FOPS(attach
);
1117 SEQ_PROFILE_FOPS(hash
);
1120 * namespace based files
1121 * several root files and
1125 #define SEQ_NS_FOPS(NAME) \
1126 static int seq_ns_ ##NAME ##_open(struct inode *inode, struct file *file) \
1128 return single_open(file, seq_ns_ ##NAME ##_show, inode->i_private); \
1131 static const struct file_operations seq_ns_ ##NAME ##_fops = { \
1132 .owner = THIS_MODULE, \
1133 .open = seq_ns_ ##NAME ##_open, \
1135 .llseek = seq_lseek, \
1136 .release = single_release, \
1139 static int seq_ns_stacked_show(struct seq_file *seq, void *v)
1141 struct aa_label
*label
;
1143 label
= begin_current_label_crit_section();
1144 seq_printf(seq
, "%s\n", label
->size
> 1 ? "yes" : "no");
1145 end_current_label_crit_section(label
);
1150 static int seq_ns_nsstacked_show(struct seq_file
*seq
, void *v
)
1152 struct aa_label
*label
;
1153 struct aa_profile
*profile
;
1157 label
= begin_current_label_crit_section();
1159 if (label
->size
> 1) {
1160 label_for_each(it
, label
, profile
)
1161 if (profile
->ns
!= labels_ns(label
)) {
1167 seq_printf(seq
, "%s\n", count
> 1 ? "yes" : "no");
1168 end_current_label_crit_section(label
);
1173 static int seq_ns_level_show(struct seq_file
*seq
, void *v
)
1175 struct aa_label
*label
;
1177 label
= begin_current_label_crit_section();
1178 seq_printf(seq
, "%d\n", labels_ns(label
)->level
);
1179 end_current_label_crit_section(label
);
1184 static int seq_ns_name_show(struct seq_file
*seq
, void *v
)
1186 struct aa_label
*label
= begin_current_label_crit_section();
1187 seq_printf(seq
, "%s\n", labels_ns(label
)->base
.name
);
1188 end_current_label_crit_section(label
);
1193 SEQ_NS_FOPS(stacked
);
1194 SEQ_NS_FOPS(nsstacked
);
1199 /* policy/raw_data/ * file ops */
1201 #define SEQ_RAWDATA_FOPS(NAME) \
1202 static int seq_rawdata_ ##NAME ##_open(struct inode *inode, struct file *file)\
1204 return seq_rawdata_open(inode, file, seq_rawdata_ ##NAME ##_show); \
1207 static const struct file_operations seq_rawdata_ ##NAME ##_fops = { \
1208 .owner = THIS_MODULE, \
1209 .open = seq_rawdata_ ##NAME ##_open, \
1211 .llseek = seq_lseek, \
1212 .release = seq_rawdata_release, \
1215 static int seq_rawdata_open(struct inode *inode, struct file *file,
1216 int (*show
)(struct seq_file
*, void *))
1218 struct aa_loaddata
*data
= __aa_get_loaddata(inode
->i_private
);
1222 /* lost race this ent is being reaped */
1225 error
= single_open(file
, show
, data
);
1227 AA_BUG(file
->private_data
&&
1228 ((struct seq_file
*)file
->private_data
)->private);
1229 aa_put_loaddata(data
);
1235 static int seq_rawdata_release(struct inode
*inode
, struct file
*file
)
1237 struct seq_file
*seq
= (struct seq_file
*) file
->private_data
;
1240 aa_put_loaddata(seq
->private);
1242 return single_release(inode
, file
);
1245 static int seq_rawdata_abi_show(struct seq_file
*seq
, void *v
)
1247 struct aa_loaddata
*data
= seq
->private;
1249 seq_printf(seq
, "v%d\n", data
->abi
);
1254 static int seq_rawdata_revision_show(struct seq_file
*seq
, void *v
)
1256 struct aa_loaddata
*data
= seq
->private;
1258 seq_printf(seq
, "%ld\n", data
->revision
);
1263 static int seq_rawdata_hash_show(struct seq_file
*seq
, void *v
)
1265 struct aa_loaddata
*data
= seq
->private;
1266 unsigned int i
, size
= aa_hash_size();
1269 for (i
= 0; i
< size
; i
++)
1270 seq_printf(seq
, "%.2x", data
->hash
[i
]);
1271 seq_putc(seq
, '\n');
1277 SEQ_RAWDATA_FOPS(abi
);
1278 SEQ_RAWDATA_FOPS(revision
);
1279 SEQ_RAWDATA_FOPS(hash
);
1281 static ssize_t
rawdata_read(struct file
*file
, char __user
*buf
, size_t size
,
1284 struct aa_loaddata
*rawdata
= file
->private_data
;
1286 return simple_read_from_buffer(buf
, size
, ppos
, rawdata
->data
,
1290 static int rawdata_release(struct inode
*inode
, struct file
*file
)
1292 aa_put_loaddata(file
->private_data
);
1297 static int rawdata_open(struct inode
*inode
, struct file
*file
)
1299 if (!policy_view_capable(NULL
))
1301 file
->private_data
= __aa_get_loaddata(inode
->i_private
);
1302 if (!file
->private_data
)
1303 /* lost race: this entry is being reaped */
1309 static const struct file_operations rawdata_fops
= {
1310 .open
= rawdata_open
,
1311 .read
= rawdata_read
,
1312 .llseek
= generic_file_llseek
,
1313 .release
= rawdata_release
,
1316 static void remove_rawdata_dents(struct aa_loaddata
*rawdata
)
1320 for (i
= 0; i
< AAFS_LOADDATA_NDENTS
; i
++) {
1321 if (!IS_ERR_OR_NULL(rawdata
->dents
[i
])) {
1322 /* no refcounts on i_private */
1323 aafs_remove(rawdata
->dents
[i
]);
1324 rawdata
->dents
[i
] = NULL
;
1329 void __aa_fs_remove_rawdata(struct aa_loaddata
*rawdata
)
1331 AA_BUG(rawdata
->ns
&& !mutex_is_locked(&rawdata
->ns
->lock
));
1334 remove_rawdata_dents(rawdata
);
1335 list_del_init(&rawdata
->list
);
1336 aa_put_ns(rawdata
->ns
);
1341 int __aa_fs_create_rawdata(struct aa_ns
*ns
, struct aa_loaddata
*rawdata
)
1343 struct dentry
*dent
, *dir
;
1347 AA_BUG(!mutex_is_locked(&ns
->lock
));
1348 AA_BUG(!ns_subdata_dir(ns
));
1351 * just use ns revision dir was originally created at. This is
1352 * under ns->lock and if load is successful revision will be
1353 * bumped and is guaranteed to be unique
1355 rawdata
->name
= kasprintf(GFP_KERNEL
, "%ld", ns
->revision
);
1359 dir
= aafs_create_dir(rawdata
->name
, ns_subdata_dir(ns
));
1361 /* ->name freed when rawdata freed */
1362 return PTR_ERR(dir
);
1363 rawdata
->dents
[AAFS_LOADDATA_DIR
] = dir
;
1365 dent
= aafs_create_file("abi", S_IFREG
| 0444, dir
, rawdata
,
1366 &seq_rawdata_abi_fops
);
1369 rawdata
->dents
[AAFS_LOADDATA_ABI
] = dent
;
1371 dent
= aafs_create_file("revision", S_IFREG
| 0444, dir
, rawdata
,
1372 &seq_rawdata_revision_fops
);
1375 rawdata
->dents
[AAFS_LOADDATA_REVISION
] = dent
;
1377 if (aa_g_hash_policy
) {
1378 dent
= aafs_create_file("sha1", S_IFREG
| 0444, dir
,
1379 rawdata
, &seq_rawdata_hash_fops
);
1382 rawdata
->dents
[AAFS_LOADDATA_HASH
] = dent
;
1385 dent
= aafs_create_file("raw_data", S_IFREG
| 0444,
1386 dir
, rawdata
, &rawdata_fops
);
1389 rawdata
->dents
[AAFS_LOADDATA_DATA
] = dent
;
1390 d_inode(dent
)->i_size
= rawdata
->size
;
1392 rawdata
->ns
= aa_get_ns(ns
);
1393 list_add(&rawdata
->list
, &ns
->rawdata_list
);
1394 /* no refcount on inode rawdata */
1399 remove_rawdata_dents(rawdata
);
1401 return PTR_ERR(dent
);
1404 /** fns to setup dynamic per profile/namespace files **/
1408 * Requires: @profile->ns->lock held
1410 void __aafs_profile_rmdir(struct aa_profile
*profile
)
1412 struct aa_profile
*child
;
1418 list_for_each_entry(child
, &profile
->base
.profiles
, base
.list
)
1419 __aafs_profile_rmdir(child
);
1421 for (i
= AAFS_PROF_SIZEOF
- 1; i
>= 0; --i
) {
1422 struct aa_proxy
*proxy
;
1423 if (!profile
->dents
[i
])
1426 proxy
= d_inode(profile
->dents
[i
])->i_private
;
1427 aafs_remove(profile
->dents
[i
]);
1428 aa_put_proxy(proxy
);
1429 profile
->dents
[i
] = NULL
;
1435 * Requires: @old->ns->lock held
1437 void __aafs_profile_migrate_dents(struct aa_profile
*old
,
1438 struct aa_profile
*new)
1444 AA_BUG(!mutex_is_locked(&profiles_ns(old
)->lock
));
1446 for (i
= 0; i
< AAFS_PROF_SIZEOF
; i
++) {
1447 new->dents
[i
] = old
->dents
[i
];
1449 new->dents
[i
]->d_inode
->i_mtime
= current_time(new->dents
[i
]->d_inode
);
1450 old
->dents
[i
] = NULL
;
1454 static struct dentry
*create_profile_file(struct dentry
*dir
, const char *name
,
1455 struct aa_profile
*profile
,
1456 const struct file_operations
*fops
)
1458 struct aa_proxy
*proxy
= aa_get_proxy(profile
->label
.proxy
);
1459 struct dentry
*dent
;
1461 dent
= aafs_create_file(name
, S_IFREG
| 0444, dir
, proxy
, fops
);
1463 aa_put_proxy(proxy
);
1468 static int profile_depth(struct aa_profile
*profile
)
1473 for (depth
= 0; profile
; profile
= rcu_access_pointer(profile
->parent
))
1480 static char *gen_symlink_name(int depth
, const char *dirname
, const char *fname
)
1484 int size
= depth
* 6 + strlen(dirname
) + strlen(fname
) + 11;
1486 s
= buffer
= kmalloc(size
, GFP_KERNEL
);
1488 return ERR_PTR(-ENOMEM
);
1490 for (; depth
> 0; depth
--) {
1491 strcpy(s
, "../../");
1496 error
= snprintf(s
, size
, "raw_data/%s/%s", dirname
, fname
);
1497 if (error
>= size
|| error
< 0) {
1499 return ERR_PTR(-ENAMETOOLONG
);
1505 static void rawdata_link_cb(void *arg
)
1510 static const char *rawdata_get_link_base(struct dentry
*dentry
,
1511 struct inode
*inode
,
1512 struct delayed_call
*done
,
1515 struct aa_proxy
*proxy
= inode
->i_private
;
1516 struct aa_label
*label
;
1517 struct aa_profile
*profile
;
1522 return ERR_PTR(-ECHILD
);
1524 label
= aa_get_label_rcu(&proxy
->label
);
1525 profile
= labels_profile(label
);
1526 depth
= profile_depth(profile
);
1527 target
= gen_symlink_name(depth
, profile
->rawdata
->name
, name
);
1528 aa_put_label(label
);
1533 set_delayed_call(done
, rawdata_link_cb
, target
);
1538 static const char *rawdata_get_link_sha1(struct dentry
*dentry
,
1539 struct inode
*inode
,
1540 struct delayed_call
*done
)
1542 return rawdata_get_link_base(dentry
, inode
, done
, "sha1");
1545 static const char *rawdata_get_link_abi(struct dentry
*dentry
,
1546 struct inode
*inode
,
1547 struct delayed_call
*done
)
1549 return rawdata_get_link_base(dentry
, inode
, done
, "abi");
1552 static const char *rawdata_get_link_data(struct dentry
*dentry
,
1553 struct inode
*inode
,
1554 struct delayed_call
*done
)
1556 return rawdata_get_link_base(dentry
, inode
, done
, "raw_data");
1559 static const struct inode_operations rawdata_link_sha1_iops
= {
1560 .get_link
= rawdata_get_link_sha1
,
1563 static const struct inode_operations rawdata_link_abi_iops
= {
1564 .get_link
= rawdata_get_link_abi
,
1566 static const struct inode_operations rawdata_link_data_iops
= {
1567 .get_link
= rawdata_get_link_data
,
1572 * Requires: @profile->ns->lock held
1574 int __aafs_profile_mkdir(struct aa_profile
*profile
, struct dentry
*parent
)
1576 struct aa_profile
*child
;
1577 struct dentry
*dent
= NULL
, *dir
;
1581 AA_BUG(!mutex_is_locked(&profiles_ns(profile
)->lock
));
1584 struct aa_profile
*p
;
1585 p
= aa_deref_parent(profile
);
1587 /* adding to parent that previously didn't have children */
1588 dent
= aafs_create_dir("profiles", dent
);
1591 prof_child_dir(p
) = parent
= dent
;
1594 if (!profile
->dirname
) {
1596 len
= mangle_name(profile
->base
.name
, NULL
);
1597 id_len
= snprintf(NULL
, 0, ".%ld", profile
->ns
->uniq_id
);
1599 profile
->dirname
= kmalloc(len
+ id_len
+ 1, GFP_KERNEL
);
1600 if (!profile
->dirname
) {
1605 mangle_name(profile
->base
.name
, profile
->dirname
);
1606 sprintf(profile
->dirname
+ len
, ".%ld", profile
->ns
->uniq_id
++);
1609 dent
= aafs_create_dir(profile
->dirname
, parent
);
1612 prof_dir(profile
) = dir
= dent
;
1614 dent
= create_profile_file(dir
, "name", profile
,
1615 &seq_profile_name_fops
);
1618 profile
->dents
[AAFS_PROF_NAME
] = dent
;
1620 dent
= create_profile_file(dir
, "mode", profile
,
1621 &seq_profile_mode_fops
);
1624 profile
->dents
[AAFS_PROF_MODE
] = dent
;
1626 dent
= create_profile_file(dir
, "attach", profile
,
1627 &seq_profile_attach_fops
);
1630 profile
->dents
[AAFS_PROF_ATTACH
] = dent
;
1632 if (profile
->hash
) {
1633 dent
= create_profile_file(dir
, "sha1", profile
,
1634 &seq_profile_hash_fops
);
1637 profile
->dents
[AAFS_PROF_HASH
] = dent
;
1640 if (profile
->rawdata
) {
1641 dent
= aafs_create_symlink("raw_sha1", dir
, NULL
,
1642 profile
->label
.proxy
,
1643 &rawdata_link_sha1_iops
);
1646 aa_get_proxy(profile
->label
.proxy
);
1647 profile
->dents
[AAFS_PROF_RAW_HASH
] = dent
;
1649 dent
= aafs_create_symlink("raw_abi", dir
, NULL
,
1650 profile
->label
.proxy
,
1651 &rawdata_link_abi_iops
);
1654 aa_get_proxy(profile
->label
.proxy
);
1655 profile
->dents
[AAFS_PROF_RAW_ABI
] = dent
;
1657 dent
= aafs_create_symlink("raw_data", dir
, NULL
,
1658 profile
->label
.proxy
,
1659 &rawdata_link_data_iops
);
1662 aa_get_proxy(profile
->label
.proxy
);
1663 profile
->dents
[AAFS_PROF_RAW_DATA
] = dent
;
1666 list_for_each_entry(child
, &profile
->base
.profiles
, base
.list
) {
1667 error
= __aafs_profile_mkdir(child
, prof_child_dir(profile
));
1675 error
= PTR_ERR(dent
);
1678 __aafs_profile_rmdir(profile
);
1683 static int ns_mkdir_op(struct inode
*dir
, struct dentry
*dentry
, umode_t mode
)
1685 struct aa_ns
*ns
, *parent
;
1686 /* TODO: improve permission check */
1687 struct aa_label
*label
;
1690 label
= begin_current_label_crit_section();
1691 error
= aa_may_manage_policy(label
, NULL
, AA_MAY_LOAD_POLICY
);
1692 end_current_label_crit_section(label
);
1696 parent
= aa_get_ns(dir
->i_private
);
1697 AA_BUG(d_inode(ns_subns_dir(parent
)) != dir
);
1699 /* we have to unlock and then relock to get locking order right
1703 error
= simple_pin_fs(&aafs_ops
, &aafs_mnt
, &aafs_count
);
1704 mutex_lock_nested(&parent
->lock
, parent
->level
);
1705 inode_lock_nested(dir
, I_MUTEX_PARENT
);
1709 error
= __aafs_setup_d_inode(dir
, dentry
, mode
| S_IFDIR
, NULL
,
1714 ns
= __aa_find_or_create_ns(parent
, READ_ONCE(dentry
->d_name
.name
),
1717 error
= PTR_ERR(ns
);
1721 aa_put_ns(ns
); /* list ref remains */
1724 simple_release_fs(&aafs_mnt
, &aafs_count
);
1726 mutex_unlock(&parent
->lock
);
1732 static int ns_rmdir_op(struct inode
*dir
, struct dentry
*dentry
)
1734 struct aa_ns
*ns
, *parent
;
1735 /* TODO: improve permission check */
1736 struct aa_label
*label
;
1739 label
= begin_current_label_crit_section();
1740 error
= aa_may_manage_policy(label
, NULL
, AA_MAY_LOAD_POLICY
);
1741 end_current_label_crit_section(label
);
1745 parent
= aa_get_ns(dir
->i_private
);
1746 /* rmdir calls the generic securityfs functions to remove files
1747 * from the apparmor dir. It is up to the apparmor ns locking
1751 inode_unlock(dentry
->d_inode
);
1753 mutex_lock_nested(&parent
->lock
, parent
->level
);
1754 ns
= aa_get_ns(__aa_findn_ns(&parent
->sub_ns
, dentry
->d_name
.name
,
1755 dentry
->d_name
.len
));
1760 AA_BUG(ns_dir(ns
) != dentry
);
1766 mutex_unlock(&parent
->lock
);
1767 inode_lock_nested(dir
, I_MUTEX_PARENT
);
1768 inode_lock(dentry
->d_inode
);
1774 static const struct inode_operations ns_dir_inode_operations
= {
1775 .lookup
= simple_lookup
,
1776 .mkdir
= ns_mkdir_op
,
1777 .rmdir
= ns_rmdir_op
,
1780 static void __aa_fs_list_remove_rawdata(struct aa_ns
*ns
)
1782 struct aa_loaddata
*ent
, *tmp
;
1784 AA_BUG(!mutex_is_locked(&ns
->lock
));
1786 list_for_each_entry_safe(ent
, tmp
, &ns
->rawdata_list
, list
)
1787 __aa_fs_remove_rawdata(ent
);
1792 * Requires: @ns->lock held
1794 void __aafs_ns_rmdir(struct aa_ns
*ns
)
1797 struct aa_profile
*child
;
1802 AA_BUG(!mutex_is_locked(&ns
->lock
));
1804 list_for_each_entry(child
, &ns
->base
.profiles
, base
.list
)
1805 __aafs_profile_rmdir(child
);
1807 list_for_each_entry(sub
, &ns
->sub_ns
, base
.list
) {
1808 mutex_lock_nested(&sub
->lock
, sub
->level
);
1809 __aafs_ns_rmdir(sub
);
1810 mutex_unlock(&sub
->lock
);
1813 __aa_fs_list_remove_rawdata(ns
);
1815 if (ns_subns_dir(ns
)) {
1816 sub
= d_inode(ns_subns_dir(ns
))->i_private
;
1819 if (ns_subload(ns
)) {
1820 sub
= d_inode(ns_subload(ns
))->i_private
;
1823 if (ns_subreplace(ns
)) {
1824 sub
= d_inode(ns_subreplace(ns
))->i_private
;
1827 if (ns_subremove(ns
)) {
1828 sub
= d_inode(ns_subremove(ns
))->i_private
;
1831 if (ns_subrevision(ns
)) {
1832 sub
= d_inode(ns_subrevision(ns
))->i_private
;
1836 for (i
= AAFS_NS_SIZEOF
- 1; i
>= 0; --i
) {
1837 aafs_remove(ns
->dents
[i
]);
1838 ns
->dents
[i
] = NULL
;
1842 /* assumes cleanup in caller */
1843 static int __aafs_ns_mkdir_entries(struct aa_ns
*ns
, struct dentry
*dir
)
1845 struct dentry
*dent
;
1850 dent
= aafs_create_dir("profiles", dir
);
1852 return PTR_ERR(dent
);
1853 ns_subprofs_dir(ns
) = dent
;
1855 dent
= aafs_create_dir("raw_data", dir
);
1857 return PTR_ERR(dent
);
1858 ns_subdata_dir(ns
) = dent
;
1860 dent
= aafs_create_file("revision", 0444, dir
, ns
,
1861 &aa_fs_ns_revision_fops
);
1863 return PTR_ERR(dent
);
1865 ns_subrevision(ns
) = dent
;
1867 dent
= aafs_create_file(".load", 0640, dir
, ns
,
1868 &aa_fs_profile_load
);
1870 return PTR_ERR(dent
);
1872 ns_subload(ns
) = dent
;
1874 dent
= aafs_create_file(".replace", 0640, dir
, ns
,
1875 &aa_fs_profile_replace
);
1877 return PTR_ERR(dent
);
1879 ns_subreplace(ns
) = dent
;
1881 dent
= aafs_create_file(".remove", 0640, dir
, ns
,
1882 &aa_fs_profile_remove
);
1884 return PTR_ERR(dent
);
1886 ns_subremove(ns
) = dent
;
1888 /* use create_dentry so we can supply private data */
1889 dent
= aafs_create("namespaces", S_IFDIR
| 0755, dir
, ns
, NULL
, NULL
,
1890 &ns_dir_inode_operations
);
1892 return PTR_ERR(dent
);
1894 ns_subns_dir(ns
) = dent
;
1900 * Requires: @ns->lock held
1902 int __aafs_ns_mkdir(struct aa_ns
*ns
, struct dentry
*parent
, const char *name
,
1903 struct dentry
*dent
)
1906 struct aa_profile
*child
;
1912 AA_BUG(!mutex_is_locked(&ns
->lock
));
1915 name
= ns
->base
.name
;
1918 /* create ns dir if it doesn't already exist */
1919 dent
= aafs_create_dir(name
, parent
);
1924 ns_dir(ns
) = dir
= dent
;
1925 error
= __aafs_ns_mkdir_entries(ns
, dir
);
1930 list_for_each_entry(child
, &ns
->base
.profiles
, base
.list
) {
1931 error
= __aafs_profile_mkdir(child
, ns_subprofs_dir(ns
));
1937 list_for_each_entry(sub
, &ns
->sub_ns
, base
.list
) {
1938 mutex_lock_nested(&sub
->lock
, sub
->level
);
1939 error
= __aafs_ns_mkdir(sub
, ns_subns_dir(ns
), NULL
, NULL
);
1940 mutex_unlock(&sub
->lock
);
1948 error
= PTR_ERR(dent
);
1951 __aafs_ns_rmdir(ns
);
1957 #define list_entry_is_head(pos, head, member) (&pos->member == (head))
1960 * __next_ns - find the next namespace to list
1961 * @root: root namespace to stop search at (NOT NULL)
1962 * @ns: current ns position (NOT NULL)
1964 * Find the next namespace from @ns under @root and handle all locking needed
1965 * while switching current namespace.
1967 * Returns: next namespace or NULL if at last namespace under @root
1968 * Requires: ns->parent->lock to be held
1969 * NOTE: will not unlock root->lock
1971 static struct aa_ns
*__next_ns(struct aa_ns
*root
, struct aa_ns
*ns
)
1973 struct aa_ns
*parent
, *next
;
1977 AA_BUG(ns
!= root
&& !mutex_is_locked(&ns
->parent
->lock
));
1979 /* is next namespace a child */
1980 if (!list_empty(&ns
->sub_ns
)) {
1981 next
= list_first_entry(&ns
->sub_ns
, typeof(*ns
), base
.list
);
1982 mutex_lock_nested(&next
->lock
, next
->level
);
1986 /* check if the next ns is a sibling, parent, gp, .. */
1987 parent
= ns
->parent
;
1988 while (ns
!= root
) {
1989 mutex_unlock(&ns
->lock
);
1990 next
= list_next_entry(ns
, base
.list
);
1991 if (!list_entry_is_head(next
, &parent
->sub_ns
, base
.list
)) {
1992 mutex_lock_nested(&next
->lock
, next
->level
);
1996 parent
= parent
->parent
;
2003 * __first_profile - find the first profile in a namespace
2004 * @root: namespace that is root of profiles being displayed (NOT NULL)
2005 * @ns: namespace to start in (NOT NULL)
2007 * Returns: unrefcounted profile or NULL if no profile
2008 * Requires: profile->ns.lock to be held
2010 static struct aa_profile
*__first_profile(struct aa_ns
*root
,
2014 AA_BUG(ns
&& !mutex_is_locked(&ns
->lock
));
2016 for (; ns
; ns
= __next_ns(root
, ns
)) {
2017 if (!list_empty(&ns
->base
.profiles
))
2018 return list_first_entry(&ns
->base
.profiles
,
2019 struct aa_profile
, base
.list
);
2025 * __next_profile - step to the next profile in a profile tree
2026 * @profile: current profile in tree (NOT NULL)
2028 * Perform a depth first traversal on the profile tree in a namespace
2030 * Returns: next profile or NULL if done
2031 * Requires: profile->ns.lock to be held
2033 static struct aa_profile
*__next_profile(struct aa_profile
*p
)
2035 struct aa_profile
*parent
;
2036 struct aa_ns
*ns
= p
->ns
;
2038 AA_BUG(!mutex_is_locked(&profiles_ns(p
)->lock
));
2040 /* is next profile a child */
2041 if (!list_empty(&p
->base
.profiles
))
2042 return list_first_entry(&p
->base
.profiles
, typeof(*p
),
2045 /* is next profile a sibling, parent sibling, gp, sibling, .. */
2046 parent
= rcu_dereference_protected(p
->parent
,
2047 mutex_is_locked(&p
->ns
->lock
));
2049 p
= list_next_entry(p
, base
.list
);
2050 if (!list_entry_is_head(p
, &parent
->base
.profiles
, base
.list
))
2053 parent
= rcu_dereference_protected(parent
->parent
,
2054 mutex_is_locked(&parent
->ns
->lock
));
2057 /* is next another profile in the namespace */
2058 p
= list_next_entry(p
, base
.list
);
2059 if (!list_entry_is_head(p
, &ns
->base
.profiles
, base
.list
))
2066 * next_profile - step to the next profile in where ever it may be
2067 * @root: root namespace (NOT NULL)
2068 * @profile: current profile (NOT NULL)
2070 * Returns: next profile or NULL if there isn't one
2072 static struct aa_profile
*next_profile(struct aa_ns
*root
,
2073 struct aa_profile
*profile
)
2075 struct aa_profile
*next
= __next_profile(profile
);
2079 /* finished all profiles in namespace move to next namespace */
2080 return __first_profile(root
, __next_ns(root
, profile
->ns
));
2084 * p_start - start a depth first traversal of profile tree
2085 * @f: seq_file to fill
2086 * @pos: current position
2088 * Returns: first profile under current namespace or NULL if none found
2090 * acquires first ns->lock
2092 static void *p_start(struct seq_file
*f
, loff_t
*pos
)
2094 struct aa_profile
*profile
= NULL
;
2095 struct aa_ns
*root
= aa_get_current_ns();
2099 /* find the first profile */
2100 mutex_lock_nested(&root
->lock
, root
->level
);
2101 profile
= __first_profile(root
, root
);
2103 /* skip to position */
2104 for (; profile
&& l
> 0; l
--)
2105 profile
= next_profile(root
, profile
);
2111 * p_next - read the next profile entry
2112 * @f: seq_file to fill
2113 * @p: profile previously returned
2114 * @pos: current position
2116 * Returns: next profile after @p or NULL if none
2118 * may acquire/release locks in namespace tree as necessary
2120 static void *p_next(struct seq_file
*f
, void *p
, loff_t
*pos
)
2122 struct aa_profile
*profile
= p
;
2123 struct aa_ns
*ns
= f
->private;
2126 return next_profile(ns
, profile
);
2130 * p_stop - stop depth first traversal
2131 * @f: seq_file we are filling
2132 * @p: the last profile writen
2134 * Release all locking done by p_start/p_next on namespace tree
2136 static void p_stop(struct seq_file
*f
, void *p
)
2138 struct aa_profile
*profile
= p
;
2139 struct aa_ns
*root
= f
->private, *ns
;
2142 for (ns
= profile
->ns
; ns
&& ns
!= root
; ns
= ns
->parent
)
2143 mutex_unlock(&ns
->lock
);
2145 mutex_unlock(&root
->lock
);
2150 * seq_show_profile - show a profile entry
2151 * @f: seq_file to file
2152 * @p: current position (profile) (NOT NULL)
2154 * Returns: error on failure
2156 static int seq_show_profile(struct seq_file
*f
, void *p
)
2158 struct aa_profile
*profile
= (struct aa_profile
*)p
;
2159 struct aa_ns
*root
= f
->private;
2161 aa_label_seq_xprint(f
, root
, &profile
->label
,
2162 FLAG_SHOW_MODE
| FLAG_VIEW_SUBNS
, GFP_KERNEL
);
2168 static const struct seq_operations aa_sfs_profiles_op
= {
2172 .show
= seq_show_profile
,
2175 static int profiles_open(struct inode
*inode
, struct file
*file
)
2177 if (!policy_view_capable(NULL
))
2180 return seq_open(file
, &aa_sfs_profiles_op
);
2183 static int profiles_release(struct inode
*inode
, struct file
*file
)
2185 return seq_release(inode
, file
);
2188 static const struct file_operations aa_sfs_profiles_fops
= {
2189 .open
= profiles_open
,
2191 .llseek
= seq_lseek
,
2192 .release
= profiles_release
,
2196 /** Base file system setup **/
2197 static struct aa_sfs_entry aa_sfs_entry_file
[] = {
2198 AA_SFS_FILE_STRING("mask",
2199 "create read write exec append mmap_exec link lock"),
2203 static struct aa_sfs_entry aa_sfs_entry_ptrace
[] = {
2204 AA_SFS_FILE_STRING("mask", "read trace"),
2208 static struct aa_sfs_entry aa_sfs_entry_signal
[] = {
2209 AA_SFS_FILE_STRING("mask", AA_SFS_SIG_MASK
),
2213 static struct aa_sfs_entry aa_sfs_entry_attach
[] = {
2214 AA_SFS_FILE_BOOLEAN("xattr", 1),
2217 static struct aa_sfs_entry aa_sfs_entry_domain
[] = {
2218 AA_SFS_FILE_BOOLEAN("change_hat", 1),
2219 AA_SFS_FILE_BOOLEAN("change_hatv", 1),
2220 AA_SFS_FILE_BOOLEAN("change_onexec", 1),
2221 AA_SFS_FILE_BOOLEAN("change_profile", 1),
2222 AA_SFS_FILE_BOOLEAN("stack", 1),
2223 AA_SFS_FILE_BOOLEAN("fix_binfmt_elf_mmap", 1),
2224 AA_SFS_FILE_BOOLEAN("post_nnp_subset", 1),
2225 AA_SFS_FILE_BOOLEAN("computed_longest_left", 1),
2226 AA_SFS_DIR("attach_conditions", aa_sfs_entry_attach
),
2227 AA_SFS_FILE_STRING("version", "1.2"),
2231 static struct aa_sfs_entry aa_sfs_entry_versions
[] = {
2232 AA_SFS_FILE_BOOLEAN("v5", 1),
2233 AA_SFS_FILE_BOOLEAN("v6", 1),
2234 AA_SFS_FILE_BOOLEAN("v7", 1),
2235 AA_SFS_FILE_BOOLEAN("v8", 1),
2239 static struct aa_sfs_entry aa_sfs_entry_policy
[] = {
2240 AA_SFS_DIR("versions", aa_sfs_entry_versions
),
2241 AA_SFS_FILE_BOOLEAN("set_load", 1),
2245 static struct aa_sfs_entry aa_sfs_entry_mount
[] = {
2246 AA_SFS_FILE_STRING("mask", "mount umount pivot_root"),
2250 static struct aa_sfs_entry aa_sfs_entry_ns
[] = {
2251 AA_SFS_FILE_BOOLEAN("profile", 1),
2252 AA_SFS_FILE_BOOLEAN("pivot_root", 0),
2256 static struct aa_sfs_entry aa_sfs_entry_query_label
[] = {
2257 AA_SFS_FILE_STRING("perms", "allow deny audit quiet"),
2258 AA_SFS_FILE_BOOLEAN("data", 1),
2259 AA_SFS_FILE_BOOLEAN("multi_transaction", 1),
2263 static struct aa_sfs_entry aa_sfs_entry_query
[] = {
2264 AA_SFS_DIR("label", aa_sfs_entry_query_label
),
2267 static struct aa_sfs_entry aa_sfs_entry_features
[] = {
2268 AA_SFS_DIR("policy", aa_sfs_entry_policy
),
2269 AA_SFS_DIR("domain", aa_sfs_entry_domain
),
2270 AA_SFS_DIR("file", aa_sfs_entry_file
),
2271 AA_SFS_DIR("network_v8", aa_sfs_entry_network
),
2272 AA_SFS_DIR("mount", aa_sfs_entry_mount
),
2273 AA_SFS_DIR("namespaces", aa_sfs_entry_ns
),
2274 AA_SFS_FILE_U64("capability", VFS_CAP_FLAGS_MASK
),
2275 AA_SFS_DIR("rlimit", aa_sfs_entry_rlimit
),
2276 AA_SFS_DIR("caps", aa_sfs_entry_caps
),
2277 AA_SFS_DIR("ptrace", aa_sfs_entry_ptrace
),
2278 AA_SFS_DIR("signal", aa_sfs_entry_signal
),
2279 AA_SFS_DIR("query", aa_sfs_entry_query
),
2283 static struct aa_sfs_entry aa_sfs_entry_apparmor
[] = {
2284 AA_SFS_FILE_FOPS(".access", 0666, &aa_sfs_access
),
2285 AA_SFS_FILE_FOPS(".stacked", 0444, &seq_ns_stacked_fops
),
2286 AA_SFS_FILE_FOPS(".ns_stacked", 0444, &seq_ns_nsstacked_fops
),
2287 AA_SFS_FILE_FOPS(".ns_level", 0444, &seq_ns_level_fops
),
2288 AA_SFS_FILE_FOPS(".ns_name", 0444, &seq_ns_name_fops
),
2289 AA_SFS_FILE_FOPS("profiles", 0444, &aa_sfs_profiles_fops
),
2290 AA_SFS_DIR("features", aa_sfs_entry_features
),
2294 static struct aa_sfs_entry aa_sfs_entry
=
2295 AA_SFS_DIR("apparmor", aa_sfs_entry_apparmor
);
2298 * entry_create_file - create a file entry in the apparmor securityfs
2299 * @fs_file: aa_sfs_entry to build an entry for (NOT NULL)
2300 * @parent: the parent dentry in the securityfs
2302 * Use entry_remove_file to remove entries created with this fn.
2304 static int __init
entry_create_file(struct aa_sfs_entry
*fs_file
,
2305 struct dentry
*parent
)
2309 fs_file
->dentry
= securityfs_create_file(fs_file
->name
,
2310 S_IFREG
| fs_file
->mode
,
2313 if (IS_ERR(fs_file
->dentry
)) {
2314 error
= PTR_ERR(fs_file
->dentry
);
2315 fs_file
->dentry
= NULL
;
2320 static void __init
entry_remove_dir(struct aa_sfs_entry
*fs_dir
);
2322 * entry_create_dir - recursively create a directory entry in the securityfs
2323 * @fs_dir: aa_sfs_entry (and all child entries) to build (NOT NULL)
2324 * @parent: the parent dentry in the securityfs
2326 * Use entry_remove_dir to remove entries created with this fn.
2328 static int __init
entry_create_dir(struct aa_sfs_entry
*fs_dir
,
2329 struct dentry
*parent
)
2331 struct aa_sfs_entry
*fs_file
;
2335 dir
= securityfs_create_dir(fs_dir
->name
, parent
);
2337 return PTR_ERR(dir
);
2338 fs_dir
->dentry
= dir
;
2340 for (fs_file
= fs_dir
->v
.files
; fs_file
&& fs_file
->name
; ++fs_file
) {
2341 if (fs_file
->v_type
== AA_SFS_TYPE_DIR
)
2342 error
= entry_create_dir(fs_file
, fs_dir
->dentry
);
2344 error
= entry_create_file(fs_file
, fs_dir
->dentry
);
2352 entry_remove_dir(fs_dir
);
2358 * entry_remove_file - drop a single file entry in the apparmor securityfs
2359 * @fs_file: aa_sfs_entry to detach from the securityfs (NOT NULL)
2361 static void __init
entry_remove_file(struct aa_sfs_entry
*fs_file
)
2363 if (!fs_file
->dentry
)
2366 securityfs_remove(fs_file
->dentry
);
2367 fs_file
->dentry
= NULL
;
2371 * entry_remove_dir - recursively drop a directory entry from the securityfs
2372 * @fs_dir: aa_sfs_entry (and all child entries) to detach (NOT NULL)
2374 static void __init
entry_remove_dir(struct aa_sfs_entry
*fs_dir
)
2376 struct aa_sfs_entry
*fs_file
;
2378 for (fs_file
= fs_dir
->v
.files
; fs_file
&& fs_file
->name
; ++fs_file
) {
2379 if (fs_file
->v_type
== AA_SFS_TYPE_DIR
)
2380 entry_remove_dir(fs_file
);
2382 entry_remove_file(fs_file
);
2385 entry_remove_file(fs_dir
);
2389 * aa_destroy_aafs - cleanup and free aafs
2391 * releases dentries allocated by aa_create_aafs
2393 void __init
aa_destroy_aafs(void)
2395 entry_remove_dir(&aa_sfs_entry
);
2399 #define NULL_FILE_NAME ".null"
2400 struct path aa_null
;
2402 static int aa_mk_null_file(struct dentry
*parent
)
2404 struct vfsmount
*mount
= NULL
;
2405 struct dentry
*dentry
;
2406 struct inode
*inode
;
2408 int error
= simple_pin_fs(parent
->d_sb
->s_type
, &mount
, &count
);
2413 inode_lock(d_inode(parent
));
2414 dentry
= lookup_one_len(NULL_FILE_NAME
, parent
, strlen(NULL_FILE_NAME
));
2415 if (IS_ERR(dentry
)) {
2416 error
= PTR_ERR(dentry
);
2419 inode
= new_inode(parent
->d_inode
->i_sb
);
2425 inode
->i_ino
= get_next_ino();
2426 inode
->i_mode
= S_IFCHR
| S_IRUGO
| S_IWUGO
;
2427 inode
->i_atime
= inode
->i_mtime
= inode
->i_ctime
= current_time(inode
);
2428 init_special_inode(inode
, S_IFCHR
| S_IRUGO
| S_IWUGO
,
2429 MKDEV(MEM_MAJOR
, 3));
2430 d_instantiate(dentry
, inode
);
2431 aa_null
.dentry
= dget(dentry
);
2432 aa_null
.mnt
= mntget(mount
);
2439 inode_unlock(d_inode(parent
));
2440 simple_release_fs(&mount
, &count
);
2446 static const char *policy_get_link(struct dentry
*dentry
,
2447 struct inode
*inode
,
2448 struct delayed_call
*done
)
2454 return ERR_PTR(-ECHILD
);
2455 ns
= aa_get_current_ns();
2456 path
.mnt
= mntget(aafs_mnt
);
2457 path
.dentry
= dget(ns_dir(ns
));
2458 nd_jump_link(&path
);
2464 static int policy_readlink(struct dentry
*dentry
, char __user
*buffer
,
2470 res
= snprintf(name
, sizeof(name
), "%s:[%lu]", AAFS_NAME
,
2471 d_inode(dentry
)->i_ino
);
2472 if (res
> 0 && res
< sizeof(name
))
2473 res
= readlink_copy(buffer
, buflen
, name
);
2480 static const struct inode_operations policy_link_iops
= {
2481 .readlink
= policy_readlink
,
2482 .get_link
= policy_get_link
,
2487 * aa_create_aafs - create the apparmor security filesystem
2489 * dentries created here are released by aa_destroy_aafs
2491 * Returns: error on failure
2493 static int __init
aa_create_aafs(void)
2495 struct dentry
*dent
;
2498 if (!apparmor_initialized
)
2501 if (aa_sfs_entry
.dentry
) {
2502 AA_ERROR("%s: AppArmor securityfs already exists\n", __func__
);
2506 /* setup apparmorfs used to virtualize policy/ */
2507 aafs_mnt
= kern_mount(&aafs_ops
);
2508 if (IS_ERR(aafs_mnt
))
2509 panic("can't set apparmorfs up\n");
2510 aafs_mnt
->mnt_sb
->s_flags
&= ~SB_NOUSER
;
2512 /* Populate fs tree. */
2513 error
= entry_create_dir(&aa_sfs_entry
, NULL
);
2517 dent
= securityfs_create_file(".load", 0666, aa_sfs_entry
.dentry
,
2518 NULL
, &aa_fs_profile_load
);
2521 ns_subload(root_ns
) = dent
;
2523 dent
= securityfs_create_file(".replace", 0666, aa_sfs_entry
.dentry
,
2524 NULL
, &aa_fs_profile_replace
);
2527 ns_subreplace(root_ns
) = dent
;
2529 dent
= securityfs_create_file(".remove", 0666, aa_sfs_entry
.dentry
,
2530 NULL
, &aa_fs_profile_remove
);
2533 ns_subremove(root_ns
) = dent
;
2535 dent
= securityfs_create_file("revision", 0444, aa_sfs_entry
.dentry
,
2536 NULL
, &aa_fs_ns_revision_fops
);
2539 ns_subrevision(root_ns
) = dent
;
2541 /* policy tree referenced by magic policy symlink */
2542 mutex_lock_nested(&root_ns
->lock
, root_ns
->level
);
2543 error
= __aafs_ns_mkdir(root_ns
, aafs_mnt
->mnt_root
, ".policy",
2544 aafs_mnt
->mnt_root
);
2545 mutex_unlock(&root_ns
->lock
);
2549 /* magic symlink similar to nsfs redirects based on task policy */
2550 dent
= securityfs_create_symlink("policy", aa_sfs_entry
.dentry
,
2551 NULL
, &policy_link_iops
);
2555 error
= aa_mk_null_file(aa_sfs_entry
.dentry
);
2559 /* TODO: add default profile to apparmorfs */
2561 /* Report that AppArmor fs is enabled */
2562 aa_info_message("AppArmor Filesystem Enabled");
2566 error
= PTR_ERR(dent
);
2569 AA_ERROR("Error creating AppArmor securityfs\n");
2573 fs_initcall(aa_create_aafs
);