This source file includes following definitions.
- mangle_name
- aafs_show_path
- aafs_free_inode
- apparmorfs_fill_super
- apparmorfs_get_tree
- apparmorfs_init_fs_context
- __aafs_setup_d_inode
- aafs_create
- aafs_create_file
- aafs_create_dir
- aafs_create_symlink
- aafs_remove
- aa_simple_write_to_buffer
- policy_update
- profile_load
- profile_replace
- profile_remove
- ns_revision_release
- ns_revision_read
- ns_revision_open
- ns_revision_poll
- __aa_bump_ns_revision
- profile_query_cb
- query_data
- query_label
- multi_transaction_kref
- get_multi_transaction
- put_multi_transaction
- multi_transaction_set
- multi_transaction_new
- multi_transaction_read
- multi_transaction_release
- aa_write_access
- aa_sfs_seq_show
- aa_sfs_seq_open
- seq_profile_open
- seq_profile_release
- seq_profile_name_show
- seq_profile_mode_show
- seq_profile_attach_show
- seq_profile_hash_show
- seq_ns_stacked_show
- seq_ns_nsstacked_show
- seq_ns_level_show
- seq_ns_name_show
- seq_rawdata_open
- seq_rawdata_release
- seq_rawdata_abi_show
- seq_rawdata_revision_show
- seq_rawdata_hash_show
- rawdata_read
- rawdata_release
- rawdata_open
- remove_rawdata_dents
- __aa_fs_remove_rawdata
- __aa_fs_create_rawdata
- __aafs_profile_rmdir
- __aafs_profile_migrate_dents
- create_profile_file
- profile_depth
- gen_symlink_name
- rawdata_link_cb
- rawdata_get_link_base
- rawdata_get_link_sha1
- rawdata_get_link_abi
- rawdata_get_link_data
- __aafs_profile_mkdir
- ns_mkdir_op
- ns_rmdir_op
- __aa_fs_list_remove_rawdata
- __aafs_ns_rmdir
- __aafs_ns_mkdir_entries
- __aafs_ns_mkdir
- __next_ns
- __first_profile
- __next_profile
- next_profile
- p_start
- p_next
- p_stop
- seq_show_profile
- profiles_open
- profiles_release
- entry_create_file
- entry_create_dir
- entry_remove_file
- entry_remove_dir
- aa_destroy_aafs
- aa_mk_null_file
- policy_get_link
- policy_readlink
- aa_create_aafs
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11 #include <linux/ctype.h>
12 #include <linux/security.h>
13 #include <linux/vmalloc.h>
14 #include <linux/init.h>
15 #include <linux/seq_file.h>
16 #include <linux/uaccess.h>
17 #include <linux/mount.h>
18 #include <linux/namei.h>
19 #include <linux/capability.h>
20 #include <linux/rcupdate.h>
21 #include <linux/fs.h>
22 #include <linux/fs_context.h>
23 #include <linux/poll.h>
24 #include <uapi/linux/major.h>
25 #include <uapi/linux/magic.h>
26
27 #include "include/apparmor.h"
28 #include "include/apparmorfs.h"
29 #include "include/audit.h"
30 #include "include/cred.h"
31 #include "include/crypto.h"
32 #include "include/ipc.h"
33 #include "include/label.h"
34 #include "include/policy.h"
35 #include "include/policy_ns.h"
36 #include "include/resource.h"
37 #include "include/policy_unpack.h"
38
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74
75 static int mangle_name(const char *name, char *target)
76 {
77 char *t = target;
78
79 while (*name == '/' || *name == '.')
80 name++;
81
82 if (target) {
83 for (; *name; name++) {
84 if (*name == '/')
85 *(t)++ = '.';
86 else if (isspace(*name))
87 *(t)++ = '_';
88 else if (isalnum(*name) || strchr("._-", *name))
89 *(t)++ = *name;
90 }
91
92 *t = 0;
93 } else {
94 int len = 0;
95 for (; *name; name++) {
96 if (isalnum(*name) || isspace(*name) ||
97 strchr("/._-", *name))
98 len++;
99 }
100
101 return len;
102 }
103
104 return t - target;
105 }
106
107
108
109
110
111
112 #define AAFS_NAME "apparmorfs"
113 static struct vfsmount *aafs_mnt;
114 static int aafs_count;
115
116
117 static int aafs_show_path(struct seq_file *seq, struct dentry *dentry)
118 {
119 seq_printf(seq, "%s:[%lu]", AAFS_NAME, d_inode(dentry)->i_ino);
120 return 0;
121 }
122
123 static void aafs_free_inode(struct inode *inode)
124 {
125 if (S_ISLNK(inode->i_mode))
126 kfree(inode->i_link);
127 free_inode_nonrcu(inode);
128 }
129
130 static const struct super_operations aafs_super_ops = {
131 .statfs = simple_statfs,
132 .free_inode = aafs_free_inode,
133 .show_path = aafs_show_path,
134 };
135
136 static int apparmorfs_fill_super(struct super_block *sb, struct fs_context *fc)
137 {
138 static struct tree_descr files[] = { {""} };
139 int error;
140
141 error = simple_fill_super(sb, AAFS_MAGIC, files);
142 if (error)
143 return error;
144 sb->s_op = &aafs_super_ops;
145
146 return 0;
147 }
148
149 static int apparmorfs_get_tree(struct fs_context *fc)
150 {
151 return get_tree_single(fc, apparmorfs_fill_super);
152 }
153
154 static const struct fs_context_operations apparmorfs_context_ops = {
155 .get_tree = apparmorfs_get_tree,
156 };
157
158 static int apparmorfs_init_fs_context(struct fs_context *fc)
159 {
160 fc->ops = &apparmorfs_context_ops;
161 return 0;
162 }
163
164 static struct file_system_type aafs_ops = {
165 .owner = THIS_MODULE,
166 .name = AAFS_NAME,
167 .init_fs_context = apparmorfs_init_fs_context,
168 .kill_sb = kill_anon_super,
169 };
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179
180
181 static int __aafs_setup_d_inode(struct inode *dir, struct dentry *dentry,
182 umode_t mode, void *data, char *link,
183 const struct file_operations *fops,
184 const struct inode_operations *iops)
185 {
186 struct inode *inode = new_inode(dir->i_sb);
187
188 AA_BUG(!dir);
189 AA_BUG(!dentry);
190
191 if (!inode)
192 return -ENOMEM;
193
194 inode->i_ino = get_next_ino();
195 inode->i_mode = mode;
196 inode->i_atime = inode->i_mtime = inode->i_ctime = current_time(inode);
197 inode->i_private = data;
198 if (S_ISDIR(mode)) {
199 inode->i_op = iops ? iops : &simple_dir_inode_operations;
200 inode->i_fop = &simple_dir_operations;
201 inc_nlink(inode);
202 inc_nlink(dir);
203 } else if (S_ISLNK(mode)) {
204 inode->i_op = iops ? iops : &simple_symlink_inode_operations;
205 inode->i_link = link;
206 } else {
207 inode->i_fop = fops;
208 }
209 d_instantiate(dentry, inode);
210 dget(dentry);
211
212 return 0;
213 }
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230
231 static struct dentry *aafs_create(const char *name, umode_t mode,
232 struct dentry *parent, void *data, void *link,
233 const struct file_operations *fops,
234 const struct inode_operations *iops)
235 {
236 struct dentry *dentry;
237 struct inode *dir;
238 int error;
239
240 AA_BUG(!name);
241 AA_BUG(!parent);
242
243 if (!(mode & S_IFMT))
244 mode = (mode & S_IALLUGO) | S_IFREG;
245
246 error = simple_pin_fs(&aafs_ops, &aafs_mnt, &aafs_count);
247 if (error)
248 return ERR_PTR(error);
249
250 dir = d_inode(parent);
251
252 inode_lock(dir);
253 dentry = lookup_one_len(name, parent, strlen(name));
254 if (IS_ERR(dentry)) {
255 error = PTR_ERR(dentry);
256 goto fail_lock;
257 }
258
259 if (d_really_is_positive(dentry)) {
260 error = -EEXIST;
261 goto fail_dentry;
262 }
263
264 error = __aafs_setup_d_inode(dir, dentry, mode, data, link, fops, iops);
265 if (error)
266 goto fail_dentry;
267 inode_unlock(dir);
268
269 return dentry;
270
271 fail_dentry:
272 dput(dentry);
273
274 fail_lock:
275 inode_unlock(dir);
276 simple_release_fs(&aafs_mnt, &aafs_count);
277
278 return ERR_PTR(error);
279 }
280
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291
292 static struct dentry *aafs_create_file(const char *name, umode_t mode,
293 struct dentry *parent, void *data,
294 const struct file_operations *fops)
295 {
296 return aafs_create(name, mode, parent, data, NULL, fops, NULL);
297 }
298
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301
302
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306
307 static struct dentry *aafs_create_dir(const char *name, struct dentry *parent)
308 {
309 return aafs_create(name, S_IFDIR | 0755, parent, NULL, NULL, NULL,
310 NULL);
311 }
312
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323
324 static struct dentry *aafs_create_symlink(const char *name,
325 struct dentry *parent,
326 const char *target,
327 void *private,
328 const struct inode_operations *iops)
329 {
330 struct dentry *dent;
331 char *link = NULL;
332
333 if (target) {
334 if (!link)
335 return ERR_PTR(-ENOMEM);
336 }
337 dent = aafs_create(name, S_IFLNK | 0444, parent, private, link, NULL,
338 iops);
339 if (IS_ERR(dent))
340 kfree(link);
341
342 return dent;
343 }
344
345
346
347
348
349
350 static void aafs_remove(struct dentry *dentry)
351 {
352 struct inode *dir;
353
354 if (!dentry || IS_ERR(dentry))
355 return;
356
357 dir = d_inode(dentry->d_parent);
358 inode_lock(dir);
359 if (simple_positive(dentry)) {
360 if (d_is_dir(dentry))
361 simple_rmdir(dir, dentry);
362 else
363 simple_unlink(dir, dentry);
364 d_delete(dentry);
365 dput(dentry);
366 }
367 inode_unlock(dir);
368 simple_release_fs(&aafs_mnt, &aafs_count);
369 }
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386 static struct aa_loaddata *aa_simple_write_to_buffer(const char __user *userbuf,
387 size_t alloc_size,
388 size_t copy_size,
389 loff_t *pos)
390 {
391 struct aa_loaddata *data;
392
393 AA_BUG(copy_size > alloc_size);
394
395 if (*pos != 0)
396
397 return ERR_PTR(-ESPIPE);
398
399
400 data = aa_loaddata_alloc(alloc_size);
401 if (IS_ERR(data))
402 return data;
403
404 data->size = copy_size;
405 if (copy_from_user(data->data, userbuf, copy_size)) {
406 kvfree(data);
407 return ERR_PTR(-EFAULT);
408 }
409
410 return data;
411 }
412
413 static ssize_t policy_update(u32 mask, const char __user *buf, size_t size,
414 loff_t *pos, struct aa_ns *ns)
415 {
416 struct aa_loaddata *data;
417 struct aa_label *label;
418 ssize_t error;
419
420 label = begin_current_label_crit_section();
421
422
423
424
425 error = aa_may_manage_policy(label, ns, mask);
426 if (error)
427 goto end_section;
428
429 data = aa_simple_write_to_buffer(buf, size, size, pos);
430 error = PTR_ERR(data);
431 if (!IS_ERR(data)) {
432 error = aa_replace_profiles(ns, label, mask, data);
433 aa_put_loaddata(data);
434 }
435 end_section:
436 end_current_label_crit_section(label);
437
438 return error;
439 }
440
441
442 static ssize_t profile_load(struct file *f, const char __user *buf, size_t size,
443 loff_t *pos)
444 {
445 struct aa_ns *ns = aa_get_ns(f->f_inode->i_private);
446 int error = policy_update(AA_MAY_LOAD_POLICY, buf, size, pos, ns);
447
448 aa_put_ns(ns);
449
450 return error;
451 }
452
453 static const struct file_operations aa_fs_profile_load = {
454 .write = profile_load,
455 .llseek = default_llseek,
456 };
457
458
459 static ssize_t profile_replace(struct file *f, const char __user *buf,
460 size_t size, loff_t *pos)
461 {
462 struct aa_ns *ns = aa_get_ns(f->f_inode->i_private);
463 int error = policy_update(AA_MAY_LOAD_POLICY | AA_MAY_REPLACE_POLICY,
464 buf, size, pos, ns);
465 aa_put_ns(ns);
466
467 return error;
468 }
469
470 static const struct file_operations aa_fs_profile_replace = {
471 .write = profile_replace,
472 .llseek = default_llseek,
473 };
474
475
476 static ssize_t profile_remove(struct file *f, const char __user *buf,
477 size_t size, loff_t *pos)
478 {
479 struct aa_loaddata *data;
480 struct aa_label *label;
481 ssize_t error;
482 struct aa_ns *ns = aa_get_ns(f->f_inode->i_private);
483
484 label = begin_current_label_crit_section();
485
486
487
488 error = aa_may_manage_policy(label, ns, AA_MAY_REMOVE_POLICY);
489 if (error)
490 goto out;
491
492
493
494
495
496 data = aa_simple_write_to_buffer(buf, size + 1, size, pos);
497
498 error = PTR_ERR(data);
499 if (!IS_ERR(data)) {
500 data->data[size] = 0;
501 error = aa_remove_profiles(ns, label, data->data, size);
502 aa_put_loaddata(data);
503 }
504 out:
505 end_current_label_crit_section(label);
506 aa_put_ns(ns);
507 return error;
508 }
509
510 static const struct file_operations aa_fs_profile_remove = {
511 .write = profile_remove,
512 .llseek = default_llseek,
513 };
514
515 struct aa_revision {
516 struct aa_ns *ns;
517 long last_read;
518 };
519
520
521 static int ns_revision_release(struct inode *inode, struct file *file)
522 {
523 struct aa_revision *rev = file->private_data;
524
525 if (rev) {
526 aa_put_ns(rev->ns);
527 kfree(rev);
528 }
529
530 return 0;
531 }
532
533 static ssize_t ns_revision_read(struct file *file, char __user *buf,
534 size_t size, loff_t *ppos)
535 {
536 struct aa_revision *rev = file->private_data;
537 char buffer[32];
538 long last_read;
539 int avail;
540
541 mutex_lock_nested(&rev->ns->lock, rev->ns->level);
542 last_read = rev->last_read;
543 if (last_read == rev->ns->revision) {
544 mutex_unlock(&rev->ns->lock);
545 if (file->f_flags & O_NONBLOCK)
546 return -EAGAIN;
547 if (wait_event_interruptible(rev->ns->wait,
548 last_read !=
549 READ_ONCE(rev->ns->revision)))
550 return -ERESTARTSYS;
551 mutex_lock_nested(&rev->ns->lock, rev->ns->level);
552 }
553
554 avail = sprintf(buffer, "%ld\n", rev->ns->revision);
555 if (*ppos + size > avail) {
556 rev->last_read = rev->ns->revision;
557 *ppos = 0;
558 }
559 mutex_unlock(&rev->ns->lock);
560
561 return simple_read_from_buffer(buf, size, ppos, buffer, avail);
562 }
563
564 static int ns_revision_open(struct inode *inode, struct file *file)
565 {
566 struct aa_revision *rev = kzalloc(sizeof(*rev), GFP_KERNEL);
567
568 if (!rev)
569 return -ENOMEM;
570
571 rev->ns = aa_get_ns(inode->i_private);
572 if (!rev->ns)
573 rev->ns = aa_get_current_ns();
574 file->private_data = rev;
575
576 return 0;
577 }
578
579 static __poll_t ns_revision_poll(struct file *file, poll_table *pt)
580 {
581 struct aa_revision *rev = file->private_data;
582 __poll_t mask = 0;
583
584 if (rev) {
585 mutex_lock_nested(&rev->ns->lock, rev->ns->level);
586 poll_wait(file, &rev->ns->wait, pt);
587 if (rev->last_read < rev->ns->revision)
588 mask |= EPOLLIN | EPOLLRDNORM;
589 mutex_unlock(&rev->ns->lock);
590 }
591
592 return mask;
593 }
594
595 void __aa_bump_ns_revision(struct aa_ns *ns)
596 {
597 WRITE_ONCE(ns->revision, ns->revision + 1);
598 wake_up_interruptible(&ns->wait);
599 }
600
601 static const struct file_operations aa_fs_ns_revision_fops = {
602 .owner = THIS_MODULE,
603 .open = ns_revision_open,
604 .poll = ns_revision_poll,
605 .read = ns_revision_read,
606 .llseek = generic_file_llseek,
607 .release = ns_revision_release,
608 };
609
610 static void profile_query_cb(struct aa_profile *profile, struct aa_perms *perms,
611 const char *match_str, size_t match_len)
612 {
613 struct aa_perms tmp = { };
614 struct aa_dfa *dfa;
615 unsigned int state = 0;
616
617 if (profile_unconfined(profile))
618 return;
619 if (profile->file.dfa && *match_str == AA_CLASS_FILE) {
620 dfa = profile->file.dfa;
621 state = aa_dfa_match_len(dfa, profile->file.start,
622 match_str + 1, match_len - 1);
623 if (state) {
624 struct path_cond cond = { };
625
626 tmp = aa_compute_fperms(dfa, state, &cond);
627 }
628 } else if (profile->policy.dfa) {
629 if (!PROFILE_MEDIATES(profile, *match_str))
630 return;
631 dfa = profile->policy.dfa;
632 state = aa_dfa_match_len(dfa, profile->policy.start[0],
633 match_str, match_len);
634 if (state)
635 aa_compute_perms(dfa, state, &tmp);
636 }
637 aa_apply_modes_to_perms(profile, &tmp);
638 aa_perms_accum_raw(perms, &tmp);
639 }
640
641
642
643
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645
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647
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652
653
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655
656
657
658
659
660 static ssize_t query_data(char *buf, size_t buf_len,
661 char *query, size_t query_len)
662 {
663 char *out;
664 const char *key;
665 struct label_it i;
666 struct aa_label *label, *curr;
667 struct aa_profile *profile;
668 struct aa_data *data;
669 u32 bytes, blocks;
670 __le32 outle32;
671
672 if (!query_len)
673 return -EINVAL;
674
675 key = query + strnlen(query, query_len) + 1;
676 if (key + 1 >= query + query_len)
677 return -EINVAL;
678 if (key + strnlen(key, query + query_len - key) >= query + query_len)
679 return -EINVAL;
680
681 if (buf_len < sizeof(bytes) + sizeof(blocks))
682 return -EINVAL;
683
684 curr = begin_current_label_crit_section();
685 label = aa_label_parse(curr, query, GFP_KERNEL, false, false);
686 end_current_label_crit_section(curr);
687 if (IS_ERR(label))
688 return PTR_ERR(label);
689
690
691
692
693
694
695
696
697
698 memset(buf, 0, sizeof(bytes) + sizeof(blocks));
699 out = buf + sizeof(bytes) + sizeof(blocks);
700
701 blocks = 0;
702 label_for_each_confined(i, label, profile) {
703 if (!profile->data)
704 continue;
705
706 data = rhashtable_lookup_fast(profile->data, &key,
707 profile->data->p);
708
709 if (data) {
710 if (out + sizeof(outle32) + data->size > buf +
711 buf_len) {
712 aa_put_label(label);
713 return -EINVAL;
714 }
715 outle32 = __cpu_to_le32(data->size);
716 memcpy(out, &outle32, sizeof(outle32));
717 out += sizeof(outle32);
718 memcpy(out, data->data, data->size);
719 out += data->size;
720 blocks++;
721 }
722 }
723 aa_put_label(label);
724
725 outle32 = __cpu_to_le32(out - buf - sizeof(bytes));
726 memcpy(buf, &outle32, sizeof(outle32));
727 outle32 = __cpu_to_le32(blocks);
728 memcpy(buf + sizeof(bytes), &outle32, sizeof(outle32));
729
730 return out - buf;
731 }
732
733
734
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752
753 static ssize_t query_label(char *buf, size_t buf_len,
754 char *query, size_t query_len, bool view_only)
755 {
756 struct aa_profile *profile;
757 struct aa_label *label, *curr;
758 char *label_name, *match_str;
759 size_t label_name_len, match_len;
760 struct aa_perms perms;
761 struct label_it i;
762
763 if (!query_len)
764 return -EINVAL;
765
766 label_name = query;
767 label_name_len = strnlen(query, query_len);
768 if (!label_name_len || label_name_len == query_len)
769 return -EINVAL;
770
771
772
773
774
775
776
777 match_str = label_name + label_name_len + 1;
778 match_len = query_len - label_name_len - 1;
779
780 curr = begin_current_label_crit_section();
781 label = aa_label_parse(curr, label_name, GFP_KERNEL, false, false);
782 end_current_label_crit_section(curr);
783 if (IS_ERR(label))
784 return PTR_ERR(label);
785
786 perms = allperms;
787 if (view_only) {
788 label_for_each_in_ns(i, labels_ns(label), label, profile) {
789 profile_query_cb(profile, &perms, match_str, match_len);
790 }
791 } else {
792 label_for_each(i, label, profile) {
793 profile_query_cb(profile, &perms, match_str, match_len);
794 }
795 }
796 aa_put_label(label);
797
798 return scnprintf(buf, buf_len,
799 "allow 0x%08x\ndeny 0x%08x\naudit 0x%08x\nquiet 0x%08x\n",
800 perms.allow, perms.deny, perms.audit, perms.quiet);
801 }
802
803
804
805
806
807
808
809
810 struct multi_transaction {
811 struct kref count;
812 ssize_t size;
813 char data[0];
814 };
815
816 #define MULTI_TRANSACTION_LIMIT (PAGE_SIZE - sizeof(struct multi_transaction))
817
818 static DEFINE_SPINLOCK(multi_transaction_lock);
819
820 static void multi_transaction_kref(struct kref *kref)
821 {
822 struct multi_transaction *t;
823
824 t = container_of(kref, struct multi_transaction, count);
825 free_page((unsigned long) t);
826 }
827
828 static struct multi_transaction *
829 get_multi_transaction(struct multi_transaction *t)
830 {
831 if (t)
832 kref_get(&(t->count));
833
834 return t;
835 }
836
837 static void put_multi_transaction(struct multi_transaction *t)
838 {
839 if (t)
840 kref_put(&(t->count), multi_transaction_kref);
841 }
842
843
844 static void multi_transaction_set(struct file *file,
845 struct multi_transaction *new, size_t n)
846 {
847 struct multi_transaction *old;
848
849 AA_BUG(n > MULTI_TRANSACTION_LIMIT);
850
851 new->size = n;
852 spin_lock(&multi_transaction_lock);
853 old = (struct multi_transaction *) file->private_data;
854 file->private_data = new;
855 spin_unlock(&multi_transaction_lock);
856 put_multi_transaction(old);
857 }
858
859 static struct multi_transaction *multi_transaction_new(struct file *file,
860 const char __user *buf,
861 size_t size)
862 {
863 struct multi_transaction *t;
864
865 if (size > MULTI_TRANSACTION_LIMIT - 1)
866 return ERR_PTR(-EFBIG);
867
868 t = (struct multi_transaction *)get_zeroed_page(GFP_KERNEL);
869 if (!t)
870 return ERR_PTR(-ENOMEM);
871 kref_init(&t->count);
872 if (copy_from_user(t->data, buf, size))
873 return ERR_PTR(-EFAULT);
874
875 return t;
876 }
877
878 static ssize_t multi_transaction_read(struct file *file, char __user *buf,
879 size_t size, loff_t *pos)
880 {
881 struct multi_transaction *t;
882 ssize_t ret;
883
884 spin_lock(&multi_transaction_lock);
885 t = get_multi_transaction(file->private_data);
886 spin_unlock(&multi_transaction_lock);
887 if (!t)
888 return 0;
889
890 ret = simple_read_from_buffer(buf, size, pos, t->data, t->size);
891 put_multi_transaction(t);
892
893 return ret;
894 }
895
896 static int multi_transaction_release(struct inode *inode, struct file *file)
897 {
898 put_multi_transaction(file->private_data);
899
900 return 0;
901 }
902
903 #define QUERY_CMD_LABEL "label\0"
904 #define QUERY_CMD_LABEL_LEN 6
905 #define QUERY_CMD_PROFILE "profile\0"
906 #define QUERY_CMD_PROFILE_LEN 8
907 #define QUERY_CMD_LABELALL "labelall\0"
908 #define QUERY_CMD_LABELALL_LEN 9
909 #define QUERY_CMD_DATA "data\0"
910 #define QUERY_CMD_DATA_LEN 5
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933 static ssize_t aa_write_access(struct file *file, const char __user *ubuf,
934 size_t count, loff_t *ppos)
935 {
936 struct multi_transaction *t;
937 ssize_t len;
938
939 if (*ppos)
940 return -ESPIPE;
941
942 t = multi_transaction_new(file, ubuf, count);
943 if (IS_ERR(t))
944 return PTR_ERR(t);
945
946 if (count > QUERY_CMD_PROFILE_LEN &&
947 !memcmp(t->data, QUERY_CMD_PROFILE, QUERY_CMD_PROFILE_LEN)) {
948 len = query_label(t->data, MULTI_TRANSACTION_LIMIT,
949 t->data + QUERY_CMD_PROFILE_LEN,
950 count - QUERY_CMD_PROFILE_LEN, true);
951 } else if (count > QUERY_CMD_LABEL_LEN &&
952 !memcmp(t->data, QUERY_CMD_LABEL, QUERY_CMD_LABEL_LEN)) {
953 len = query_label(t->data, MULTI_TRANSACTION_LIMIT,
954 t->data + QUERY_CMD_LABEL_LEN,
955 count - QUERY_CMD_LABEL_LEN, true);
956 } else if (count > QUERY_CMD_LABELALL_LEN &&
957 !memcmp(t->data, QUERY_CMD_LABELALL,
958 QUERY_CMD_LABELALL_LEN)) {
959 len = query_label(t->data, MULTI_TRANSACTION_LIMIT,
960 t->data + QUERY_CMD_LABELALL_LEN,
961 count - QUERY_CMD_LABELALL_LEN, false);
962 } else if (count > QUERY_CMD_DATA_LEN &&
963 !memcmp(t->data, QUERY_CMD_DATA, QUERY_CMD_DATA_LEN)) {
964 len = query_data(t->data, MULTI_TRANSACTION_LIMIT,
965 t->data + QUERY_CMD_DATA_LEN,
966 count - QUERY_CMD_DATA_LEN);
967 } else
968 len = -EINVAL;
969
970 if (len < 0) {
971 put_multi_transaction(t);
972 return len;
973 }
974
975 multi_transaction_set(file, t, len);
976
977 return count;
978 }
979
980 static const struct file_operations aa_sfs_access = {
981 .write = aa_write_access,
982 .read = multi_transaction_read,
983 .release = multi_transaction_release,
984 .llseek = generic_file_llseek,
985 };
986
987 static int aa_sfs_seq_show(struct seq_file *seq, void *v)
988 {
989 struct aa_sfs_entry *fs_file = seq->private;
990
991 if (!fs_file)
992 return 0;
993
994 switch (fs_file->v_type) {
995 case AA_SFS_TYPE_BOOLEAN:
996 seq_printf(seq, "%s\n", fs_file->v.boolean ? "yes" : "no");
997 break;
998 case AA_SFS_TYPE_STRING:
999 seq_printf(seq, "%s\n", fs_file->v.string);
1000 break;
1001 case AA_SFS_TYPE_U64:
1002 seq_printf(seq, "%#08lx\n", fs_file->v.u64);
1003 break;
1004 default:
1005
1006 break;
1007 }
1008
1009 return 0;
1010 }
1011
1012 static int aa_sfs_seq_open(struct inode *inode, struct file *file)
1013 {
1014 return single_open(file, aa_sfs_seq_show, inode->i_private);
1015 }
1016
1017 const struct file_operations aa_sfs_seq_file_ops = {
1018 .owner = THIS_MODULE,
1019 .open = aa_sfs_seq_open,
1020 .read = seq_read,
1021 .llseek = seq_lseek,
1022 .release = single_release,
1023 };
1024
1025
1026
1027
1028
1029
1030 #define SEQ_PROFILE_FOPS(NAME) \
1031 static int seq_profile_ ##NAME ##_open(struct inode *inode, struct file *file)\
1032 { \
1033 return seq_profile_open(inode, file, seq_profile_ ##NAME ##_show); \
1034 } \
1035 \
1036 static const struct file_operations seq_profile_ ##NAME ##_fops = { \
1037 .owner = THIS_MODULE, \
1038 .open = seq_profile_ ##NAME ##_open, \
1039 .read = seq_read, \
1040 .llseek = seq_lseek, \
1041 .release = seq_profile_release, \
1042 } \
1043
1044 static int seq_profile_open(struct inode *inode, struct file *file,
1045 int (*show)(struct seq_file *, void *))
1046 {
1047 struct aa_proxy *proxy = aa_get_proxy(inode->i_private);
1048 int error = single_open(file, show, proxy);
1049
1050 if (error) {
1051 file->private_data = NULL;
1052 aa_put_proxy(proxy);
1053 }
1054
1055 return error;
1056 }
1057
1058 static int seq_profile_release(struct inode *inode, struct file *file)
1059 {
1060 struct seq_file *seq = (struct seq_file *) file->private_data;
1061 if (seq)
1062 aa_put_proxy(seq->private);
1063 return single_release(inode, file);
1064 }
1065
1066 static int seq_profile_name_show(struct seq_file *seq, void *v)
1067 {
1068 struct aa_proxy *proxy = seq->private;
1069 struct aa_label *label = aa_get_label_rcu(&proxy->label);
1070 struct aa_profile *profile = labels_profile(label);
1071 seq_printf(seq, "%s\n", profile->base.name);
1072 aa_put_label(label);
1073
1074 return 0;
1075 }
1076
1077 static int seq_profile_mode_show(struct seq_file *seq, void *v)
1078 {
1079 struct aa_proxy *proxy = seq->private;
1080 struct aa_label *label = aa_get_label_rcu(&proxy->label);
1081 struct aa_profile *profile = labels_profile(label);
1082 seq_printf(seq, "%s\n", aa_profile_mode_names[profile->mode]);
1083 aa_put_label(label);
1084
1085 return 0;
1086 }
1087
1088 static int seq_profile_attach_show(struct seq_file *seq, void *v)
1089 {
1090 struct aa_proxy *proxy = seq->private;
1091 struct aa_label *label = aa_get_label_rcu(&proxy->label);
1092 struct aa_profile *profile = labels_profile(label);
1093 if (profile->attach)
1094 seq_printf(seq, "%s\n", profile->attach);
1095 else if (profile->xmatch)
1096 seq_puts(seq, "<unknown>\n");
1097 else
1098 seq_printf(seq, "%s\n", profile->base.name);
1099 aa_put_label(label);
1100
1101 return 0;
1102 }
1103
1104 static int seq_profile_hash_show(struct seq_file *seq, void *v)
1105 {
1106 struct aa_proxy *proxy = seq->private;
1107 struct aa_label *label = aa_get_label_rcu(&proxy->label);
1108 struct aa_profile *profile = labels_profile(label);
1109 unsigned int i, size = aa_hash_size();
1110
1111 if (profile->hash) {
1112 for (i = 0; i < size; i++)
1113 seq_printf(seq, "%.2x", profile->hash[i]);
1114 seq_putc(seq, '\n');
1115 }
1116 aa_put_label(label);
1117
1118 return 0;
1119 }
1120
1121 SEQ_PROFILE_FOPS(name);
1122 SEQ_PROFILE_FOPS(mode);
1123 SEQ_PROFILE_FOPS(attach);
1124 SEQ_PROFILE_FOPS(hash);
1125
1126
1127
1128
1129
1130
1131
1132 #define SEQ_NS_FOPS(NAME) \
1133 static int seq_ns_ ##NAME ##_open(struct inode *inode, struct file *file) \
1134 { \
1135 return single_open(file, seq_ns_ ##NAME ##_show, inode->i_private); \
1136 } \
1137 \
1138 static const struct file_operations seq_ns_ ##NAME ##_fops = { \
1139 .owner = THIS_MODULE, \
1140 .open = seq_ns_ ##NAME ##_open, \
1141 .read = seq_read, \
1142 .llseek = seq_lseek, \
1143 .release = single_release, \
1144 } \
1145
1146 static int seq_ns_stacked_show(struct seq_file *seq, void *v)
1147 {
1148 struct aa_label *label;
1149
1150 label = begin_current_label_crit_section();
1151 seq_printf(seq, "%s\n", label->size > 1 ? "yes" : "no");
1152 end_current_label_crit_section(label);
1153
1154 return 0;
1155 }
1156
1157 static int seq_ns_nsstacked_show(struct seq_file *seq, void *v)
1158 {
1159 struct aa_label *label;
1160 struct aa_profile *profile;
1161 struct label_it it;
1162 int count = 1;
1163
1164 label = begin_current_label_crit_section();
1165
1166 if (label->size > 1) {
1167 label_for_each(it, label, profile)
1168 if (profile->ns != labels_ns(label)) {
1169 count++;
1170 break;
1171 }
1172 }
1173
1174 seq_printf(seq, "%s\n", count > 1 ? "yes" : "no");
1175 end_current_label_crit_section(label);
1176
1177 return 0;
1178 }
1179
1180 static int seq_ns_level_show(struct seq_file *seq, void *v)
1181 {
1182 struct aa_label *label;
1183
1184 label = begin_current_label_crit_section();
1185 seq_printf(seq, "%d\n", labels_ns(label)->level);
1186 end_current_label_crit_section(label);
1187
1188 return 0;
1189 }
1190
1191 static int seq_ns_name_show(struct seq_file *seq, void *v)
1192 {
1193 struct aa_label *label = begin_current_label_crit_section();
1194 seq_printf(seq, "%s\n", labels_ns(label)->base.name);
1195 end_current_label_crit_section(label);
1196
1197 return 0;
1198 }
1199
1200 SEQ_NS_FOPS(stacked);
1201 SEQ_NS_FOPS(nsstacked);
1202 SEQ_NS_FOPS(level);
1203 SEQ_NS_FOPS(name);
1204
1205
1206
1207
1208 #define SEQ_RAWDATA_FOPS(NAME) \
1209 static int seq_rawdata_ ##NAME ##_open(struct inode *inode, struct file *file)\
1210 { \
1211 return seq_rawdata_open(inode, file, seq_rawdata_ ##NAME ##_show); \
1212 } \
1213 \
1214 static const struct file_operations seq_rawdata_ ##NAME ##_fops = { \
1215 .owner = THIS_MODULE, \
1216 .open = seq_rawdata_ ##NAME ##_open, \
1217 .read = seq_read, \
1218 .llseek = seq_lseek, \
1219 .release = seq_rawdata_release, \
1220 } \
1221
1222 static int seq_rawdata_open(struct inode *inode, struct file *file,
1223 int (*show)(struct seq_file *, void *))
1224 {
1225 struct aa_loaddata *data = __aa_get_loaddata(inode->i_private);
1226 int error;
1227
1228 if (!data)
1229
1230 return -ENOENT;
1231
1232 error = single_open(file, show, data);
1233 if (error) {
1234 AA_BUG(file->private_data &&
1235 ((struct seq_file *)file->private_data)->private);
1236 aa_put_loaddata(data);
1237 }
1238
1239 return error;
1240 }
1241
1242 static int seq_rawdata_release(struct inode *inode, struct file *file)
1243 {
1244 struct seq_file *seq = (struct seq_file *) file->private_data;
1245
1246 if (seq)
1247 aa_put_loaddata(seq->private);
1248
1249 return single_release(inode, file);
1250 }
1251
1252 static int seq_rawdata_abi_show(struct seq_file *seq, void *v)
1253 {
1254 struct aa_loaddata *data = seq->private;
1255
1256 seq_printf(seq, "v%d\n", data->abi);
1257
1258 return 0;
1259 }
1260
1261 static int seq_rawdata_revision_show(struct seq_file *seq, void *v)
1262 {
1263 struct aa_loaddata *data = seq->private;
1264
1265 seq_printf(seq, "%ld\n", data->revision);
1266
1267 return 0;
1268 }
1269
1270 static int seq_rawdata_hash_show(struct seq_file *seq, void *v)
1271 {
1272 struct aa_loaddata *data = seq->private;
1273 unsigned int i, size = aa_hash_size();
1274
1275 if (data->hash) {
1276 for (i = 0; i < size; i++)
1277 seq_printf(seq, "%.2x", data->hash[i]);
1278 seq_putc(seq, '\n');
1279 }
1280
1281 return 0;
1282 }
1283
1284 SEQ_RAWDATA_FOPS(abi);
1285 SEQ_RAWDATA_FOPS(revision);
1286 SEQ_RAWDATA_FOPS(hash);
1287
1288 static ssize_t rawdata_read(struct file *file, char __user *buf, size_t size,
1289 loff_t *ppos)
1290 {
1291 struct aa_loaddata *rawdata = file->private_data;
1292
1293 return simple_read_from_buffer(buf, size, ppos, rawdata->data,
1294 rawdata->size);
1295 }
1296
1297 static int rawdata_release(struct inode *inode, struct file *file)
1298 {
1299 aa_put_loaddata(file->private_data);
1300
1301 return 0;
1302 }
1303
1304 static int rawdata_open(struct inode *inode, struct file *file)
1305 {
1306 if (!policy_view_capable(NULL))
1307 return -EACCES;
1308 file->private_data = __aa_get_loaddata(inode->i_private);
1309 if (!file->private_data)
1310
1311 return -ENOENT;
1312
1313 return 0;
1314 }
1315
1316 static const struct file_operations rawdata_fops = {
1317 .open = rawdata_open,
1318 .read = rawdata_read,
1319 .llseek = generic_file_llseek,
1320 .release = rawdata_release,
1321 };
1322
1323 static void remove_rawdata_dents(struct aa_loaddata *rawdata)
1324 {
1325 int i;
1326
1327 for (i = 0; i < AAFS_LOADDATA_NDENTS; i++) {
1328 if (!IS_ERR_OR_NULL(rawdata->dents[i])) {
1329
1330 aafs_remove(rawdata->dents[i]);
1331 rawdata->dents[i] = NULL;
1332 }
1333 }
1334 }
1335
1336 void __aa_fs_remove_rawdata(struct aa_loaddata *rawdata)
1337 {
1338 AA_BUG(rawdata->ns && !mutex_is_locked(&rawdata->ns->lock));
1339
1340 if (rawdata->ns) {
1341 remove_rawdata_dents(rawdata);
1342 list_del_init(&rawdata->list);
1343 aa_put_ns(rawdata->ns);
1344 rawdata->ns = NULL;
1345 }
1346 }
1347
1348 int __aa_fs_create_rawdata(struct aa_ns *ns, struct aa_loaddata *rawdata)
1349 {
1350 struct dentry *dent, *dir;
1351
1352 AA_BUG(!ns);
1353 AA_BUG(!rawdata);
1354 AA_BUG(!mutex_is_locked(&ns->lock));
1355 AA_BUG(!ns_subdata_dir(ns));
1356
1357
1358
1359
1360
1361
1362 rawdata->name = kasprintf(GFP_KERNEL, "%ld", ns->revision);
1363 if (!rawdata->name)
1364 return -ENOMEM;
1365
1366 dir = aafs_create_dir(rawdata->name, ns_subdata_dir(ns));
1367 if (IS_ERR(dir))
1368
1369 return PTR_ERR(dir);
1370 rawdata->dents[AAFS_LOADDATA_DIR] = dir;
1371
1372 dent = aafs_create_file("abi", S_IFREG | 0444, dir, rawdata,
1373 &seq_rawdata_abi_fops);
1374 if (IS_ERR(dent))
1375 goto fail;
1376 rawdata->dents[AAFS_LOADDATA_ABI] = dent;
1377
1378 dent = aafs_create_file("revision", S_IFREG | 0444, dir, rawdata,
1379 &seq_rawdata_revision_fops);
1380 if (IS_ERR(dent))
1381 goto fail;
1382 rawdata->dents[AAFS_LOADDATA_REVISION] = dent;
1383
1384 if (aa_g_hash_policy) {
1385 dent = aafs_create_file("sha1", S_IFREG | 0444, dir,
1386 rawdata, &seq_rawdata_hash_fops);
1387 if (IS_ERR(dent))
1388 goto fail;
1389 rawdata->dents[AAFS_LOADDATA_HASH] = dent;
1390 }
1391
1392 dent = aafs_create_file("raw_data", S_IFREG | 0444,
1393 dir, rawdata, &rawdata_fops);
1394 if (IS_ERR(dent))
1395 goto fail;
1396 rawdata->dents[AAFS_LOADDATA_DATA] = dent;
1397 d_inode(dent)->i_size = rawdata->size;
1398
1399 rawdata->ns = aa_get_ns(ns);
1400 list_add(&rawdata->list, &ns->rawdata_list);
1401
1402
1403 return 0;
1404
1405 fail:
1406 remove_rawdata_dents(rawdata);
1407
1408 return PTR_ERR(dent);
1409 }
1410
1411
1412
1413
1414
1415
1416
1417 void __aafs_profile_rmdir(struct aa_profile *profile)
1418 {
1419 struct aa_profile *child;
1420 int i;
1421
1422 if (!profile)
1423 return;
1424
1425 list_for_each_entry(child, &profile->base.profiles, base.list)
1426 __aafs_profile_rmdir(child);
1427
1428 for (i = AAFS_PROF_SIZEOF - 1; i >= 0; --i) {
1429 struct aa_proxy *proxy;
1430 if (!profile->dents[i])
1431 continue;
1432
1433 proxy = d_inode(profile->dents[i])->i_private;
1434 aafs_remove(profile->dents[i]);
1435 aa_put_proxy(proxy);
1436 profile->dents[i] = NULL;
1437 }
1438 }
1439
1440
1441
1442
1443
1444 void __aafs_profile_migrate_dents(struct aa_profile *old,
1445 struct aa_profile *new)
1446 {
1447 int i;
1448
1449 AA_BUG(!old);
1450 AA_BUG(!new);
1451 AA_BUG(!mutex_is_locked(&profiles_ns(old)->lock));
1452
1453 for (i = 0; i < AAFS_PROF_SIZEOF; i++) {
1454 new->dents[i] = old->dents[i];
1455 if (new->dents[i])
1456 new->dents[i]->d_inode->i_mtime = current_time(new->dents[i]->d_inode);
1457 old->dents[i] = NULL;
1458 }
1459 }
1460
1461 static struct dentry *create_profile_file(struct dentry *dir, const char *name,
1462 struct aa_profile *profile,
1463 const struct file_operations *fops)
1464 {
1465 struct aa_proxy *proxy = aa_get_proxy(profile->label.proxy);
1466 struct dentry *dent;
1467
1468 dent = aafs_create_file(name, S_IFREG | 0444, dir, proxy, fops);
1469 if (IS_ERR(dent))
1470 aa_put_proxy(proxy);
1471
1472 return dent;
1473 }
1474
1475 static int profile_depth(struct aa_profile *profile)
1476 {
1477 int depth = 0;
1478
1479 rcu_read_lock();
1480 for (depth = 0; profile; profile = rcu_access_pointer(profile->parent))
1481 depth++;
1482 rcu_read_unlock();
1483
1484 return depth;
1485 }
1486
1487 static char *gen_symlink_name(int depth, const char *dirname, const char *fname)
1488 {
1489 char *buffer, *s;
1490 int error;
1491 int size = depth * 6 + strlen(dirname) + strlen(fname) + 11;
1492
1493 s = buffer = kmalloc(size, GFP_KERNEL);
1494 if (!buffer)
1495 return ERR_PTR(-ENOMEM);
1496
1497 for (; depth > 0; depth--) {
1498 strcpy(s, "../../");
1499 s += 6;
1500 size -= 6;
1501 }
1502
1503 error = snprintf(s, size, "raw_data/%s/%s", dirname, fname);
1504 if (error >= size || error < 0) {
1505 kfree(buffer);
1506 return ERR_PTR(-ENAMETOOLONG);
1507 }
1508
1509 return buffer;
1510 }
1511
1512 static void rawdata_link_cb(void *arg)
1513 {
1514 kfree(arg);
1515 }
1516
1517 static const char *rawdata_get_link_base(struct dentry *dentry,
1518 struct inode *inode,
1519 struct delayed_call *done,
1520 const char *name)
1521 {
1522 struct aa_proxy *proxy = inode->i_private;
1523 struct aa_label *label;
1524 struct aa_profile *profile;
1525 char *target;
1526 int depth;
1527
1528 if (!dentry)
1529 return ERR_PTR(-ECHILD);
1530
1531 label = aa_get_label_rcu(&proxy->label);
1532 profile = labels_profile(label);
1533 depth = profile_depth(profile);
1534 target = gen_symlink_name(depth, profile->rawdata->name, name);
1535 aa_put_label(label);
1536
1537 if (IS_ERR(target))
1538 return target;
1539
1540 set_delayed_call(done, rawdata_link_cb, target);
1541
1542 return target;
1543 }
1544
1545 static const char *rawdata_get_link_sha1(struct dentry *dentry,
1546 struct inode *inode,
1547 struct delayed_call *done)
1548 {
1549 return rawdata_get_link_base(dentry, inode, done, "sha1");
1550 }
1551
1552 static const char *rawdata_get_link_abi(struct dentry *dentry,
1553 struct inode *inode,
1554 struct delayed_call *done)
1555 {
1556 return rawdata_get_link_base(dentry, inode, done, "abi");
1557 }
1558
1559 static const char *rawdata_get_link_data(struct dentry *dentry,
1560 struct inode *inode,
1561 struct delayed_call *done)
1562 {
1563 return rawdata_get_link_base(dentry, inode, done, "raw_data");
1564 }
1565
1566 static const struct inode_operations rawdata_link_sha1_iops = {
1567 .get_link = rawdata_get_link_sha1,
1568 };
1569
1570 static const struct inode_operations rawdata_link_abi_iops = {
1571 .get_link = rawdata_get_link_abi,
1572 };
1573 static const struct inode_operations rawdata_link_data_iops = {
1574 .get_link = rawdata_get_link_data,
1575 };
1576
1577
1578
1579
1580
1581 int __aafs_profile_mkdir(struct aa_profile *profile, struct dentry *parent)
1582 {
1583 struct aa_profile *child;
1584 struct dentry *dent = NULL, *dir;
1585 int error;
1586
1587 AA_BUG(!profile);
1588 AA_BUG(!mutex_is_locked(&profiles_ns(profile)->lock));
1589
1590 if (!parent) {
1591 struct aa_profile *p;
1592 p = aa_deref_parent(profile);
1593 dent = prof_dir(p);
1594
1595 dent = aafs_create_dir("profiles", dent);
1596 if (IS_ERR(dent))
1597 goto fail;
1598 prof_child_dir(p) = parent = dent;
1599 }
1600
1601 if (!profile->dirname) {
1602 int len, id_len;
1603 len = mangle_name(profile->base.name, NULL);
1604 id_len = snprintf(NULL, 0, ".%ld", profile->ns->uniq_id);
1605
1606 profile->dirname = kmalloc(len + id_len + 1, GFP_KERNEL);
1607 if (!profile->dirname) {
1608 error = -ENOMEM;
1609 goto fail2;
1610 }
1611
1612 mangle_name(profile->base.name, profile->dirname);
1613 sprintf(profile->dirname + len, ".%ld", profile->ns->uniq_id++);
1614 }
1615
1616 dent = aafs_create_dir(profile->dirname, parent);
1617 if (IS_ERR(dent))
1618 goto fail;
1619 prof_dir(profile) = dir = dent;
1620
1621 dent = create_profile_file(dir, "name", profile,
1622 &seq_profile_name_fops);
1623 if (IS_ERR(dent))
1624 goto fail;
1625 profile->dents[AAFS_PROF_NAME] = dent;
1626
1627 dent = create_profile_file(dir, "mode", profile,
1628 &seq_profile_mode_fops);
1629 if (IS_ERR(dent))
1630 goto fail;
1631 profile->dents[AAFS_PROF_MODE] = dent;
1632
1633 dent = create_profile_file(dir, "attach", profile,
1634 &seq_profile_attach_fops);
1635 if (IS_ERR(dent))
1636 goto fail;
1637 profile->dents[AAFS_PROF_ATTACH] = dent;
1638
1639 if (profile->hash) {
1640 dent = create_profile_file(dir, "sha1", profile,
1641 &seq_profile_hash_fops);
1642 if (IS_ERR(dent))
1643 goto fail;
1644 profile->dents[AAFS_PROF_HASH] = dent;
1645 }
1646
1647 if (profile->rawdata) {
1648 dent = aafs_create_symlink("raw_sha1", dir, NULL,
1649 profile->label.proxy,
1650 &rawdata_link_sha1_iops);
1651 if (IS_ERR(dent))
1652 goto fail;
1653 aa_get_proxy(profile->label.proxy);
1654 profile->dents[AAFS_PROF_RAW_HASH] = dent;
1655
1656 dent = aafs_create_symlink("raw_abi", dir, NULL,
1657 profile->label.proxy,
1658 &rawdata_link_abi_iops);
1659 if (IS_ERR(dent))
1660 goto fail;
1661 aa_get_proxy(profile->label.proxy);
1662 profile->dents[AAFS_PROF_RAW_ABI] = dent;
1663
1664 dent = aafs_create_symlink("raw_data", dir, NULL,
1665 profile->label.proxy,
1666 &rawdata_link_data_iops);
1667 if (IS_ERR(dent))
1668 goto fail;
1669 aa_get_proxy(profile->label.proxy);
1670 profile->dents[AAFS_PROF_RAW_DATA] = dent;
1671 }
1672
1673 list_for_each_entry(child, &profile->base.profiles, base.list) {
1674 error = __aafs_profile_mkdir(child, prof_child_dir(profile));
1675 if (error)
1676 goto fail2;
1677 }
1678
1679 return 0;
1680
1681 fail:
1682 error = PTR_ERR(dent);
1683
1684 fail2:
1685 __aafs_profile_rmdir(profile);
1686
1687 return error;
1688 }
1689
1690 static int ns_mkdir_op(struct inode *dir, struct dentry *dentry, umode_t mode)
1691 {
1692 struct aa_ns *ns, *parent;
1693
1694 struct aa_label *label;
1695 int error;
1696
1697 label = begin_current_label_crit_section();
1698 error = aa_may_manage_policy(label, NULL, AA_MAY_LOAD_POLICY);
1699 end_current_label_crit_section(label);
1700 if (error)
1701 return error;
1702
1703 parent = aa_get_ns(dir->i_private);
1704 AA_BUG(d_inode(ns_subns_dir(parent)) != dir);
1705
1706
1707
1708
1709 inode_unlock(dir);
1710 error = simple_pin_fs(&aafs_ops, &aafs_mnt, &aafs_count);
1711 mutex_lock_nested(&parent->lock, parent->level);
1712 inode_lock_nested(dir, I_MUTEX_PARENT);
1713 if (error)
1714 goto out;
1715
1716 error = __aafs_setup_d_inode(dir, dentry, mode | S_IFDIR, NULL,
1717 NULL, NULL, NULL);
1718 if (error)
1719 goto out_pin;
1720
1721 ns = __aa_find_or_create_ns(parent, READ_ONCE(dentry->d_name.name),
1722 dentry);
1723 if (IS_ERR(ns)) {
1724 error = PTR_ERR(ns);
1725 ns = NULL;
1726 }
1727
1728 aa_put_ns(ns);
1729 out_pin:
1730 if (error)
1731 simple_release_fs(&aafs_mnt, &aafs_count);
1732 out:
1733 mutex_unlock(&parent->lock);
1734 aa_put_ns(parent);
1735
1736 return error;
1737 }
1738
1739 static int ns_rmdir_op(struct inode *dir, struct dentry *dentry)
1740 {
1741 struct aa_ns *ns, *parent;
1742
1743 struct aa_label *label;
1744 int error;
1745
1746 label = begin_current_label_crit_section();
1747 error = aa_may_manage_policy(label, NULL, AA_MAY_LOAD_POLICY);
1748 end_current_label_crit_section(label);
1749 if (error)
1750 return error;
1751
1752 parent = aa_get_ns(dir->i_private);
1753
1754
1755
1756
1757 inode_unlock(dir);
1758 inode_unlock(dentry->d_inode);
1759
1760 mutex_lock_nested(&parent->lock, parent->level);
1761 ns = aa_get_ns(__aa_findn_ns(&parent->sub_ns, dentry->d_name.name,
1762 dentry->d_name.len));
1763 if (!ns) {
1764 error = -ENOENT;
1765 goto out;
1766 }
1767 AA_BUG(ns_dir(ns) != dentry);
1768
1769 __aa_remove_ns(ns);
1770 aa_put_ns(ns);
1771
1772 out:
1773 mutex_unlock(&parent->lock);
1774 inode_lock_nested(dir, I_MUTEX_PARENT);
1775 inode_lock(dentry->d_inode);
1776 aa_put_ns(parent);
1777
1778 return error;
1779 }
1780
1781 static const struct inode_operations ns_dir_inode_operations = {
1782 .lookup = simple_lookup,
1783 .mkdir = ns_mkdir_op,
1784 .rmdir = ns_rmdir_op,
1785 };
1786
1787 static void __aa_fs_list_remove_rawdata(struct aa_ns *ns)
1788 {
1789 struct aa_loaddata *ent, *tmp;
1790
1791 AA_BUG(!mutex_is_locked(&ns->lock));
1792
1793 list_for_each_entry_safe(ent, tmp, &ns->rawdata_list, list)
1794 __aa_fs_remove_rawdata(ent);
1795 }
1796
1797
1798
1799
1800
1801 void __aafs_ns_rmdir(struct aa_ns *ns)
1802 {
1803 struct aa_ns *sub;
1804 struct aa_profile *child;
1805 int i;
1806
1807 if (!ns)
1808 return;
1809 AA_BUG(!mutex_is_locked(&ns->lock));
1810
1811 list_for_each_entry(child, &ns->base.profiles, base.list)
1812 __aafs_profile_rmdir(child);
1813
1814 list_for_each_entry(sub, &ns->sub_ns, base.list) {
1815 mutex_lock_nested(&sub->lock, sub->level);
1816 __aafs_ns_rmdir(sub);
1817 mutex_unlock(&sub->lock);
1818 }
1819
1820 __aa_fs_list_remove_rawdata(ns);
1821
1822 if (ns_subns_dir(ns)) {
1823 sub = d_inode(ns_subns_dir(ns))->i_private;
1824 aa_put_ns(sub);
1825 }
1826 if (ns_subload(ns)) {
1827 sub = d_inode(ns_subload(ns))->i_private;
1828 aa_put_ns(sub);
1829 }
1830 if (ns_subreplace(ns)) {
1831 sub = d_inode(ns_subreplace(ns))->i_private;
1832 aa_put_ns(sub);
1833 }
1834 if (ns_subremove(ns)) {
1835 sub = d_inode(ns_subremove(ns))->i_private;
1836 aa_put_ns(sub);
1837 }
1838 if (ns_subrevision(ns)) {
1839 sub = d_inode(ns_subrevision(ns))->i_private;
1840 aa_put_ns(sub);
1841 }
1842
1843 for (i = AAFS_NS_SIZEOF - 1; i >= 0; --i) {
1844 aafs_remove(ns->dents[i]);
1845 ns->dents[i] = NULL;
1846 }
1847 }
1848
1849
1850 static int __aafs_ns_mkdir_entries(struct aa_ns *ns, struct dentry *dir)
1851 {
1852 struct dentry *dent;
1853
1854 AA_BUG(!ns);
1855 AA_BUG(!dir);
1856
1857 dent = aafs_create_dir("profiles", dir);
1858 if (IS_ERR(dent))
1859 return PTR_ERR(dent);
1860 ns_subprofs_dir(ns) = dent;
1861
1862 dent = aafs_create_dir("raw_data", dir);
1863 if (IS_ERR(dent))
1864 return PTR_ERR(dent);
1865 ns_subdata_dir(ns) = dent;
1866
1867 dent = aafs_create_file("revision", 0444, dir, ns,
1868 &aa_fs_ns_revision_fops);
1869 if (IS_ERR(dent))
1870 return PTR_ERR(dent);
1871 aa_get_ns(ns);
1872 ns_subrevision(ns) = dent;
1873
1874 dent = aafs_create_file(".load", 0640, dir, ns,
1875 &aa_fs_profile_load);
1876 if (IS_ERR(dent))
1877 return PTR_ERR(dent);
1878 aa_get_ns(ns);
1879 ns_subload(ns) = dent;
1880
1881 dent = aafs_create_file(".replace", 0640, dir, ns,
1882 &aa_fs_profile_replace);
1883 if (IS_ERR(dent))
1884 return PTR_ERR(dent);
1885 aa_get_ns(ns);
1886 ns_subreplace(ns) = dent;
1887
1888 dent = aafs_create_file(".remove", 0640, dir, ns,
1889 &aa_fs_profile_remove);
1890 if (IS_ERR(dent))
1891 return PTR_ERR(dent);
1892 aa_get_ns(ns);
1893 ns_subremove(ns) = dent;
1894
1895
1896 dent = aafs_create("namespaces", S_IFDIR | 0755, dir, ns, NULL, NULL,
1897 &ns_dir_inode_operations);
1898 if (IS_ERR(dent))
1899 return PTR_ERR(dent);
1900 aa_get_ns(ns);
1901 ns_subns_dir(ns) = dent;
1902
1903 return 0;
1904 }
1905
1906
1907
1908
1909 int __aafs_ns_mkdir(struct aa_ns *ns, struct dentry *parent, const char *name,
1910 struct dentry *dent)
1911 {
1912 struct aa_ns *sub;
1913 struct aa_profile *child;
1914 struct dentry *dir;
1915 int error;
1916
1917 AA_BUG(!ns);
1918 AA_BUG(!parent);
1919 AA_BUG(!mutex_is_locked(&ns->lock));
1920
1921 if (!name)
1922 name = ns->base.name;
1923
1924 if (!dent) {
1925
1926 dent = aafs_create_dir(name, parent);
1927 if (IS_ERR(dent))
1928 goto fail;
1929 } else
1930 dget(dent);
1931 ns_dir(ns) = dir = dent;
1932 error = __aafs_ns_mkdir_entries(ns, dir);
1933 if (error)
1934 goto fail2;
1935
1936
1937 list_for_each_entry(child, &ns->base.profiles, base.list) {
1938 error = __aafs_profile_mkdir(child, ns_subprofs_dir(ns));
1939 if (error)
1940 goto fail2;
1941 }
1942
1943
1944 list_for_each_entry(sub, &ns->sub_ns, base.list) {
1945 mutex_lock_nested(&sub->lock, sub->level);
1946 error = __aafs_ns_mkdir(sub, ns_subns_dir(ns), NULL, NULL);
1947 mutex_unlock(&sub->lock);
1948 if (error)
1949 goto fail2;
1950 }
1951
1952 return 0;
1953
1954 fail:
1955 error = PTR_ERR(dent);
1956
1957 fail2:
1958 __aafs_ns_rmdir(ns);
1959
1960 return error;
1961 }
1962
1963
1964 #define list_entry_is_head(pos, head, member) (&pos->member == (head))
1965
1966
1967
1968
1969
1970
1971
1972
1973
1974
1975
1976
1977
1978 static struct aa_ns *__next_ns(struct aa_ns *root, struct aa_ns *ns)
1979 {
1980 struct aa_ns *parent, *next;
1981
1982 AA_BUG(!root);
1983 AA_BUG(!ns);
1984 AA_BUG(ns != root && !mutex_is_locked(&ns->parent->lock));
1985
1986
1987 if (!list_empty(&ns->sub_ns)) {
1988 next = list_first_entry(&ns->sub_ns, typeof(*ns), base.list);
1989 mutex_lock_nested(&next->lock, next->level);
1990 return next;
1991 }
1992
1993
1994 parent = ns->parent;
1995 while (ns != root) {
1996 mutex_unlock(&ns->lock);
1997 next = list_next_entry(ns, base.list);
1998 if (!list_entry_is_head(next, &parent->sub_ns, base.list)) {
1999 mutex_lock_nested(&next->lock, next->level);
2000 return next;
2001 }
2002 ns = parent;
2003 parent = parent->parent;
2004 }
2005
2006 return NULL;
2007 }
2008
2009
2010
2011
2012
2013
2014
2015
2016
2017 static struct aa_profile *__first_profile(struct aa_ns *root,
2018 struct aa_ns *ns)
2019 {
2020 AA_BUG(!root);
2021 AA_BUG(ns && !mutex_is_locked(&ns->lock));
2022
2023 for (; ns; ns = __next_ns(root, ns)) {
2024 if (!list_empty(&ns->base.profiles))
2025 return list_first_entry(&ns->base.profiles,
2026 struct aa_profile, base.list);
2027 }
2028 return NULL;
2029 }
2030
2031
2032
2033
2034
2035
2036
2037
2038
2039
2040 static struct aa_profile *__next_profile(struct aa_profile *p)
2041 {
2042 struct aa_profile *parent;
2043 struct aa_ns *ns = p->ns;
2044
2045 AA_BUG(!mutex_is_locked(&profiles_ns(p)->lock));
2046
2047
2048 if (!list_empty(&p->base.profiles))
2049 return list_first_entry(&p->base.profiles, typeof(*p),
2050 base.list);
2051
2052
2053 parent = rcu_dereference_protected(p->parent,
2054 mutex_is_locked(&p->ns->lock));
2055 while (parent) {
2056 p = list_next_entry(p, base.list);
2057 if (!list_entry_is_head(p, &parent->base.profiles, base.list))
2058 return p;
2059 p = parent;
2060 parent = rcu_dereference_protected(parent->parent,
2061 mutex_is_locked(&parent->ns->lock));
2062 }
2063
2064
2065 p = list_next_entry(p, base.list);
2066 if (!list_entry_is_head(p, &ns->base.profiles, base.list))
2067 return p;
2068
2069 return NULL;
2070 }
2071
2072
2073
2074
2075
2076
2077
2078
2079 static struct aa_profile *next_profile(struct aa_ns *root,
2080 struct aa_profile *profile)
2081 {
2082 struct aa_profile *next = __next_profile(profile);
2083 if (next)
2084 return next;
2085
2086
2087 return __first_profile(root, __next_ns(root, profile->ns));
2088 }
2089
2090
2091
2092
2093
2094
2095
2096
2097
2098
2099 static void *p_start(struct seq_file *f, loff_t *pos)
2100 {
2101 struct aa_profile *profile = NULL;
2102 struct aa_ns *root = aa_get_current_ns();
2103 loff_t l = *pos;
2104 f->private = root;
2105
2106
2107 mutex_lock_nested(&root->lock, root->level);
2108 profile = __first_profile(root, root);
2109
2110
2111 for (; profile && l > 0; l--)
2112 profile = next_profile(root, profile);
2113
2114 return profile;
2115 }
2116
2117
2118
2119
2120
2121
2122
2123
2124
2125
2126
2127 static void *p_next(struct seq_file *f, void *p, loff_t *pos)
2128 {
2129 struct aa_profile *profile = p;
2130 struct aa_ns *ns = f->private;
2131 (*pos)++;
2132
2133 return next_profile(ns, profile);
2134 }
2135
2136
2137
2138
2139
2140
2141
2142
2143 static void p_stop(struct seq_file *f, void *p)
2144 {
2145 struct aa_profile *profile = p;
2146 struct aa_ns *root = f->private, *ns;
2147
2148 if (profile) {
2149 for (ns = profile->ns; ns && ns != root; ns = ns->parent)
2150 mutex_unlock(&ns->lock);
2151 }
2152 mutex_unlock(&root->lock);
2153 aa_put_ns(root);
2154 }
2155
2156
2157
2158
2159
2160
2161
2162
2163 static int seq_show_profile(struct seq_file *f, void *p)
2164 {
2165 struct aa_profile *profile = (struct aa_profile *)p;
2166 struct aa_ns *root = f->private;
2167
2168 aa_label_seq_xprint(f, root, &profile->label,
2169 FLAG_SHOW_MODE | FLAG_VIEW_SUBNS, GFP_KERNEL);
2170 seq_putc(f, '\n');
2171
2172 return 0;
2173 }
2174
2175 static const struct seq_operations aa_sfs_profiles_op = {
2176 .start = p_start,
2177 .next = p_next,
2178 .stop = p_stop,
2179 .show = seq_show_profile,
2180 };
2181
2182 static int profiles_open(struct inode *inode, struct file *file)
2183 {
2184 if (!policy_view_capable(NULL))
2185 return -EACCES;
2186
2187 return seq_open(file, &aa_sfs_profiles_op);
2188 }
2189
2190 static int profiles_release(struct inode *inode, struct file *file)
2191 {
2192 return seq_release(inode, file);
2193 }
2194
2195 static const struct file_operations aa_sfs_profiles_fops = {
2196 .open = profiles_open,
2197 .read = seq_read,
2198 .llseek = seq_lseek,
2199 .release = profiles_release,
2200 };
2201
2202
2203
2204 static struct aa_sfs_entry aa_sfs_entry_file[] = {
2205 AA_SFS_FILE_STRING("mask",
2206 "create read write exec append mmap_exec link lock"),
2207 { }
2208 };
2209
2210 static struct aa_sfs_entry aa_sfs_entry_ptrace[] = {
2211 AA_SFS_FILE_STRING("mask", "read trace"),
2212 { }
2213 };
2214
2215 static struct aa_sfs_entry aa_sfs_entry_signal[] = {
2216 AA_SFS_FILE_STRING("mask", AA_SFS_SIG_MASK),
2217 { }
2218 };
2219
2220 static struct aa_sfs_entry aa_sfs_entry_attach[] = {
2221 AA_SFS_FILE_BOOLEAN("xattr", 1),
2222 { }
2223 };
2224 static struct aa_sfs_entry aa_sfs_entry_domain[] = {
2225 AA_SFS_FILE_BOOLEAN("change_hat", 1),
2226 AA_SFS_FILE_BOOLEAN("change_hatv", 1),
2227 AA_SFS_FILE_BOOLEAN("change_onexec", 1),
2228 AA_SFS_FILE_BOOLEAN("change_profile", 1),
2229 AA_SFS_FILE_BOOLEAN("stack", 1),
2230 AA_SFS_FILE_BOOLEAN("fix_binfmt_elf_mmap", 1),
2231 AA_SFS_FILE_BOOLEAN("post_nnp_subset", 1),
2232 AA_SFS_FILE_BOOLEAN("computed_longest_left", 1),
2233 AA_SFS_DIR("attach_conditions", aa_sfs_entry_attach),
2234 AA_SFS_FILE_STRING("version", "1.2"),
2235 { }
2236 };
2237
2238 static struct aa_sfs_entry aa_sfs_entry_versions[] = {
2239 AA_SFS_FILE_BOOLEAN("v5", 1),
2240 AA_SFS_FILE_BOOLEAN("v6", 1),
2241 AA_SFS_FILE_BOOLEAN("v7", 1),
2242 AA_SFS_FILE_BOOLEAN("v8", 1),
2243 { }
2244 };
2245
2246 static struct aa_sfs_entry aa_sfs_entry_policy[] = {
2247 AA_SFS_DIR("versions", aa_sfs_entry_versions),
2248 AA_SFS_FILE_BOOLEAN("set_load", 1),
2249 { }
2250 };
2251
2252 static struct aa_sfs_entry aa_sfs_entry_mount[] = {
2253 AA_SFS_FILE_STRING("mask", "mount umount pivot_root"),
2254 { }
2255 };
2256
2257 static struct aa_sfs_entry aa_sfs_entry_ns[] = {
2258 AA_SFS_FILE_BOOLEAN("profile", 1),
2259 AA_SFS_FILE_BOOLEAN("pivot_root", 0),
2260 { }
2261 };
2262
2263 static struct aa_sfs_entry aa_sfs_entry_query_label[] = {
2264 AA_SFS_FILE_STRING("perms", "allow deny audit quiet"),
2265 AA_SFS_FILE_BOOLEAN("data", 1),
2266 AA_SFS_FILE_BOOLEAN("multi_transaction", 1),
2267 { }
2268 };
2269
2270 static struct aa_sfs_entry aa_sfs_entry_query[] = {
2271 AA_SFS_DIR("label", aa_sfs_entry_query_label),
2272 { }
2273 };
2274 static struct aa_sfs_entry aa_sfs_entry_features[] = {
2275 AA_SFS_DIR("policy", aa_sfs_entry_policy),
2276 AA_SFS_DIR("domain", aa_sfs_entry_domain),
2277 AA_SFS_DIR("file", aa_sfs_entry_file),
2278 AA_SFS_DIR("network_v8", aa_sfs_entry_network),
2279 AA_SFS_DIR("mount", aa_sfs_entry_mount),
2280 AA_SFS_DIR("namespaces", aa_sfs_entry_ns),
2281 AA_SFS_FILE_U64("capability", VFS_CAP_FLAGS_MASK),
2282 AA_SFS_DIR("rlimit", aa_sfs_entry_rlimit),
2283 AA_SFS_DIR("caps", aa_sfs_entry_caps),
2284 AA_SFS_DIR("ptrace", aa_sfs_entry_ptrace),
2285 AA_SFS_DIR("signal", aa_sfs_entry_signal),
2286 AA_SFS_DIR("query", aa_sfs_entry_query),
2287 { }
2288 };
2289
2290 static struct aa_sfs_entry aa_sfs_entry_apparmor[] = {
2291 AA_SFS_FILE_FOPS(".access", 0666, &aa_sfs_access),
2292 AA_SFS_FILE_FOPS(".stacked", 0444, &seq_ns_stacked_fops),
2293 AA_SFS_FILE_FOPS(".ns_stacked", 0444, &seq_ns_nsstacked_fops),
2294 AA_SFS_FILE_FOPS(".ns_level", 0444, &seq_ns_level_fops),
2295 AA_SFS_FILE_FOPS(".ns_name", 0444, &seq_ns_name_fops),
2296 AA_SFS_FILE_FOPS("profiles", 0444, &aa_sfs_profiles_fops),
2297 AA_SFS_DIR("features", aa_sfs_entry_features),
2298 { }
2299 };
2300
2301 static struct aa_sfs_entry aa_sfs_entry =
2302 AA_SFS_DIR("apparmor", aa_sfs_entry_apparmor);
2303
2304
2305
2306
2307
2308
2309
2310
2311 static int __init entry_create_file(struct aa_sfs_entry *fs_file,
2312 struct dentry *parent)
2313 {
2314 int error = 0;
2315
2316 fs_file->dentry = securityfs_create_file(fs_file->name,
2317 S_IFREG | fs_file->mode,
2318 parent, fs_file,
2319 fs_file->file_ops);
2320 if (IS_ERR(fs_file->dentry)) {
2321 error = PTR_ERR(fs_file->dentry);
2322 fs_file->dentry = NULL;
2323 }
2324 return error;
2325 }
2326
2327 static void __init entry_remove_dir(struct aa_sfs_entry *fs_dir);
2328
2329
2330
2331
2332
2333
2334
2335 static int __init entry_create_dir(struct aa_sfs_entry *fs_dir,
2336 struct dentry *parent)
2337 {
2338 struct aa_sfs_entry *fs_file;
2339 struct dentry *dir;
2340 int error;
2341
2342 dir = securityfs_create_dir(fs_dir->name, parent);
2343 if (IS_ERR(dir))
2344 return PTR_ERR(dir);
2345 fs_dir->dentry = dir;
2346
2347 for (fs_file = fs_dir->v.files; fs_file && fs_file->name; ++fs_file) {
2348 if (fs_file->v_type == AA_SFS_TYPE_DIR)
2349 error = entry_create_dir(fs_file, fs_dir->dentry);
2350 else
2351 error = entry_create_file(fs_file, fs_dir->dentry);
2352 if (error)
2353 goto failed;
2354 }
2355
2356 return 0;
2357
2358 failed:
2359 entry_remove_dir(fs_dir);
2360
2361 return error;
2362 }
2363
2364
2365
2366
2367
2368 static void __init entry_remove_file(struct aa_sfs_entry *fs_file)
2369 {
2370 if (!fs_file->dentry)
2371 return;
2372
2373 securityfs_remove(fs_file->dentry);
2374 fs_file->dentry = NULL;
2375 }
2376
2377
2378
2379
2380
2381 static void __init entry_remove_dir(struct aa_sfs_entry *fs_dir)
2382 {
2383 struct aa_sfs_entry *fs_file;
2384
2385 for (fs_file = fs_dir->v.files; fs_file && fs_file->name; ++fs_file) {
2386 if (fs_file->v_type == AA_SFS_TYPE_DIR)
2387 entry_remove_dir(fs_file);
2388 else
2389 entry_remove_file(fs_file);
2390 }
2391
2392 entry_remove_file(fs_dir);
2393 }
2394
2395
2396
2397
2398
2399
2400 void __init aa_destroy_aafs(void)
2401 {
2402 entry_remove_dir(&aa_sfs_entry);
2403 }
2404
2405
2406 #define NULL_FILE_NAME ".null"
2407 struct path aa_null;
2408
2409 static int aa_mk_null_file(struct dentry *parent)
2410 {
2411 struct vfsmount *mount = NULL;
2412 struct dentry *dentry;
2413 struct inode *inode;
2414 int count = 0;
2415 int error = simple_pin_fs(parent->d_sb->s_type, &mount, &count);
2416
2417 if (error)
2418 return error;
2419
2420 inode_lock(d_inode(parent));
2421 dentry = lookup_one_len(NULL_FILE_NAME, parent, strlen(NULL_FILE_NAME));
2422 if (IS_ERR(dentry)) {
2423 error = PTR_ERR(dentry);
2424 goto out;
2425 }
2426 inode = new_inode(parent->d_inode->i_sb);
2427 if (!inode) {
2428 error = -ENOMEM;
2429 goto out1;
2430 }
2431
2432 inode->i_ino = get_next_ino();
2433 inode->i_mode = S_IFCHR | S_IRUGO | S_IWUGO;
2434 inode->i_atime = inode->i_mtime = inode->i_ctime = current_time(inode);
2435 init_special_inode(inode, S_IFCHR | S_IRUGO | S_IWUGO,
2436 MKDEV(MEM_MAJOR, 3));
2437 d_instantiate(dentry, inode);
2438 aa_null.dentry = dget(dentry);
2439 aa_null.mnt = mntget(mount);
2440
2441 error = 0;
2442
2443 out1:
2444 dput(dentry);
2445 out:
2446 inode_unlock(d_inode(parent));
2447 simple_release_fs(&mount, &count);
2448 return error;
2449 }
2450
2451
2452
2453 static const char *policy_get_link(struct dentry *dentry,
2454 struct inode *inode,
2455 struct delayed_call *done)
2456 {
2457 struct aa_ns *ns;
2458 struct path path;
2459
2460 if (!dentry)
2461 return ERR_PTR(-ECHILD);
2462 ns = aa_get_current_ns();
2463 path.mnt = mntget(aafs_mnt);
2464 path.dentry = dget(ns_dir(ns));
2465 nd_jump_link(&path);
2466 aa_put_ns(ns);
2467
2468 return NULL;
2469 }
2470
2471 static int policy_readlink(struct dentry *dentry, char __user *buffer,
2472 int buflen)
2473 {
2474 char name[32];
2475 int res;
2476
2477 res = snprintf(name, sizeof(name), "%s:[%lu]", AAFS_NAME,
2478 d_inode(dentry)->i_ino);
2479 if (res > 0 && res < sizeof(name))
2480 res = readlink_copy(buffer, buflen, name);
2481 else
2482 res = -ENOENT;
2483
2484 return res;
2485 }
2486
2487 static const struct inode_operations policy_link_iops = {
2488 .readlink = policy_readlink,
2489 .get_link = policy_get_link,
2490 };
2491
2492
2493
2494
2495
2496
2497
2498
2499
2500 static int __init aa_create_aafs(void)
2501 {
2502 struct dentry *dent;
2503 int error;
2504
2505 if (!apparmor_initialized)
2506 return 0;
2507
2508 if (aa_sfs_entry.dentry) {
2509 AA_ERROR("%s: AppArmor securityfs already exists\n", __func__);
2510 return -EEXIST;
2511 }
2512
2513
2514 aafs_mnt = kern_mount(&aafs_ops);
2515 if (IS_ERR(aafs_mnt))
2516 panic("can't set apparmorfs up\n");
2517 aafs_mnt->mnt_sb->s_flags &= ~SB_NOUSER;
2518
2519
2520 error = entry_create_dir(&aa_sfs_entry, NULL);
2521 if (error)
2522 goto error;
2523
2524 dent = securityfs_create_file(".load", 0666, aa_sfs_entry.dentry,
2525 NULL, &aa_fs_profile_load);
2526 if (IS_ERR(dent))
2527 goto dent_error;
2528 ns_subload(root_ns) = dent;
2529
2530 dent = securityfs_create_file(".replace", 0666, aa_sfs_entry.dentry,
2531 NULL, &aa_fs_profile_replace);
2532 if (IS_ERR(dent))
2533 goto dent_error;
2534 ns_subreplace(root_ns) = dent;
2535
2536 dent = securityfs_create_file(".remove", 0666, aa_sfs_entry.dentry,
2537 NULL, &aa_fs_profile_remove);
2538 if (IS_ERR(dent))
2539 goto dent_error;
2540 ns_subremove(root_ns) = dent;
2541
2542 dent = securityfs_create_file("revision", 0444, aa_sfs_entry.dentry,
2543 NULL, &aa_fs_ns_revision_fops);
2544 if (IS_ERR(dent))
2545 goto dent_error;
2546 ns_subrevision(root_ns) = dent;
2547
2548
2549 mutex_lock_nested(&root_ns->lock, root_ns->level);
2550 error = __aafs_ns_mkdir(root_ns, aafs_mnt->mnt_root, ".policy",
2551 aafs_mnt->mnt_root);
2552 mutex_unlock(&root_ns->lock);
2553 if (error)
2554 goto error;
2555
2556
2557 dent = securityfs_create_symlink("policy", aa_sfs_entry.dentry,
2558 NULL, &policy_link_iops);
2559 if (IS_ERR(dent))
2560 goto dent_error;
2561
2562 error = aa_mk_null_file(aa_sfs_entry.dentry);
2563 if (error)
2564 goto error;
2565
2566
2567
2568
2569 aa_info_message("AppArmor Filesystem Enabled");
2570 return 0;
2571
2572 dent_error:
2573 error = PTR_ERR(dent);
2574 error:
2575 aa_destroy_aafs();
2576 AA_ERROR("Error creating AppArmor securityfs\n");
2577 return error;
2578 }
2579
2580 fs_initcall(aa_create_aafs);