Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* Updated: Karl MacMillan <kmacmillan@tresys.com> |
| 2 | * |
Eric Paris | 1872981 | 2008-04-17 14:15:45 -0400 | [diff] [blame] | 3 | * Added conditional policy language extensions |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4 | * |
Paul Moore | 3bb56b2 | 2008-01-29 08:38:19 -0500 | [diff] [blame] | 5 | * Updated: Hewlett-Packard <paul.moore@hp.com> |
| 6 | * |
Eric Paris | 1872981 | 2008-04-17 14:15:45 -0400 | [diff] [blame] | 7 | * Added support for the policy capability bitmap |
Paul Moore | 3bb56b2 | 2008-01-29 08:38:19 -0500 | [diff] [blame] | 8 | * |
| 9 | * Copyright (C) 2007 Hewlett-Packard Development Company, L.P. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 10 | * Copyright (C) 2003 - 2004 Tresys Technology, LLC |
| 11 | * Copyright (C) 2004 Red Hat, Inc., James Morris <jmorris@redhat.com> |
| 12 | * This program is free software; you can redistribute it and/or modify |
Eric Paris | 1872981 | 2008-04-17 14:15:45 -0400 | [diff] [blame] | 13 | * it under the terms of the GNU General Public License as published by |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 14 | * the Free Software Foundation, version 2. |
| 15 | */ |
| 16 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 17 | #include <linux/kernel.h> |
| 18 | #include <linux/pagemap.h> |
| 19 | #include <linux/slab.h> |
| 20 | #include <linux/vmalloc.h> |
| 21 | #include <linux/fs.h> |
Ingo Molnar | bb00307 | 2006-03-22 00:09:14 -0800 | [diff] [blame] | 22 | #include <linux/mutex.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 23 | #include <linux/init.h> |
| 24 | #include <linux/string.h> |
| 25 | #include <linux/security.h> |
| 26 | #include <linux/major.h> |
| 27 | #include <linux/seq_file.h> |
| 28 | #include <linux/percpu.h> |
Steve Grubb | af601e4 | 2006-01-04 14:08:39 +0000 | [diff] [blame] | 29 | #include <linux/audit.h> |
Eric Paris | f526971 | 2008-05-14 11:27:45 -0400 | [diff] [blame] | 30 | #include <linux/uaccess.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 31 | |
| 32 | /* selinuxfs pseudo filesystem for exporting the security policy API. |
| 33 | Based on the proc code and the fs/nfsd/nfsctl.c code. */ |
| 34 | |
| 35 | #include "flask.h" |
| 36 | #include "avc.h" |
| 37 | #include "avc_ss.h" |
| 38 | #include "security.h" |
| 39 | #include "objsec.h" |
| 40 | #include "conditional.h" |
| 41 | |
Paul Moore | 3bb56b2 | 2008-01-29 08:38:19 -0500 | [diff] [blame] | 42 | /* Policy capability filenames */ |
| 43 | static char *policycap_names[] = { |
Eric Paris | b0c636b | 2008-02-28 12:58:40 -0500 | [diff] [blame] | 44 | "network_peer_controls", |
| 45 | "open_perms" |
Paul Moore | 3bb56b2 | 2008-01-29 08:38:19 -0500 | [diff] [blame] | 46 | }; |
| 47 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 48 | unsigned int selinux_checkreqprot = CONFIG_SECURITY_SELINUX_CHECKREQPROT_VALUE; |
| 49 | |
| 50 | static int __init checkreqprot_setup(char *str) |
| 51 | { |
Eric Paris | f526971 | 2008-05-14 11:27:45 -0400 | [diff] [blame] | 52 | unsigned long checkreqprot; |
| 53 | if (!strict_strtoul(str, 0, &checkreqprot)) |
| 54 | selinux_checkreqprot = checkreqprot ? 1 : 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 55 | return 1; |
| 56 | } |
| 57 | __setup("checkreqprot=", checkreqprot_setup); |
| 58 | |
Ingo Molnar | bb00307 | 2006-03-22 00:09:14 -0800 | [diff] [blame] | 59 | static DEFINE_MUTEX(sel_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 60 | |
| 61 | /* global data for booleans */ |
Eric Paris | 1872981 | 2008-04-17 14:15:45 -0400 | [diff] [blame] | 62 | static struct dentry *bool_dir; |
| 63 | static int bool_num; |
Stephen Smalley | d313f94 | 2007-11-26 11:12:53 -0500 | [diff] [blame] | 64 | static char **bool_pending_names; |
Eric Paris | 1872981 | 2008-04-17 14:15:45 -0400 | [diff] [blame] | 65 | static int *bool_pending_values; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 66 | |
Christopher J. PeBenito | e47c8fc | 2007-05-23 09:12:09 -0400 | [diff] [blame] | 67 | /* global data for classes */ |
Eric Paris | 1872981 | 2008-04-17 14:15:45 -0400 | [diff] [blame] | 68 | static struct dentry *class_dir; |
Christopher J. PeBenito | e47c8fc | 2007-05-23 09:12:09 -0400 | [diff] [blame] | 69 | static unsigned long last_class_ino; |
| 70 | |
Eric Paris | cee74f4 | 2010-10-13 17:50:25 -0400 | [diff] [blame] | 71 | static char policy_opened; |
| 72 | |
Paul Moore | 3bb56b2 | 2008-01-29 08:38:19 -0500 | [diff] [blame] | 73 | /* global data for policy capabilities */ |
Eric Paris | 1872981 | 2008-04-17 14:15:45 -0400 | [diff] [blame] | 74 | static struct dentry *policycap_dir; |
Paul Moore | 3bb56b2 | 2008-01-29 08:38:19 -0500 | [diff] [blame] | 75 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 76 | extern void selnl_notify_setenforce(int val); |
| 77 | |
| 78 | /* Check whether a task is allowed to use a security operation. */ |
| 79 | static int task_has_security(struct task_struct *tsk, |
| 80 | u32 perms) |
| 81 | { |
David Howells | c69e8d9 | 2008-11-14 10:39:19 +1100 | [diff] [blame] | 82 | const struct task_security_struct *tsec; |
| 83 | u32 sid = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 84 | |
David Howells | c69e8d9 | 2008-11-14 10:39:19 +1100 | [diff] [blame] | 85 | rcu_read_lock(); |
| 86 | tsec = __task_cred(tsk)->security; |
| 87 | if (tsec) |
| 88 | sid = tsec->sid; |
| 89 | rcu_read_unlock(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 90 | if (!tsec) |
| 91 | return -EACCES; |
| 92 | |
David Howells | c69e8d9 | 2008-11-14 10:39:19 +1100 | [diff] [blame] | 93 | return avc_has_perm(sid, SECINITSID_SECURITY, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 94 | SECCLASS_SECURITY, perms, NULL); |
| 95 | } |
| 96 | |
| 97 | enum sel_inos { |
| 98 | SEL_ROOT_INO = 2, |
| 99 | SEL_LOAD, /* load policy */ |
| 100 | SEL_ENFORCE, /* get or set enforcing status */ |
| 101 | SEL_CONTEXT, /* validate context */ |
| 102 | SEL_ACCESS, /* compute access decision */ |
| 103 | SEL_CREATE, /* compute create labeling decision */ |
| 104 | SEL_RELABEL, /* compute relabeling decision */ |
| 105 | SEL_USER, /* compute reachable user contexts */ |
| 106 | SEL_POLICYVERS, /* return policy version for this kernel */ |
| 107 | SEL_COMMIT_BOOLS, /* commit new boolean values */ |
| 108 | SEL_MLS, /* return if MLS policy is enabled */ |
| 109 | SEL_DISABLE, /* disable SELinux until next reboot */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 110 | SEL_MEMBER, /* compute polyinstantiation membership decision */ |
| 111 | SEL_CHECKREQPROT, /* check requested protection, not kernel-applied one */ |
James Morris | 4e5ab4c | 2006-06-09 00:33:33 -0700 | [diff] [blame] | 112 | SEL_COMPAT_NET, /* whether to use old compat network packet controls */ |
Eric Paris | 3f12070 | 2007-09-21 14:37:10 -0400 | [diff] [blame] | 113 | SEL_REJECT_UNKNOWN, /* export unknown reject handling to userspace */ |
| 114 | SEL_DENY_UNKNOWN, /* export unknown deny handling to userspace */ |
KaiGai Kohei | 1190416 | 2010-09-14 18:28:39 +0900 | [diff] [blame] | 115 | SEL_STATUS, /* export current status using mmap() */ |
Eric Paris | cee74f4 | 2010-10-13 17:50:25 -0400 | [diff] [blame] | 116 | SEL_POLICY, /* allow userspace to read the in kernel policy */ |
James Carter | 6174eaf | 2007-04-04 16:18:39 -0400 | [diff] [blame] | 117 | SEL_INO_NEXT, /* The next inode number to use */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 118 | }; |
| 119 | |
James Carter | 6174eaf | 2007-04-04 16:18:39 -0400 | [diff] [blame] | 120 | static unsigned long sel_last_ino = SEL_INO_NEXT - 1; |
| 121 | |
Paul Moore | 3bb56b2 | 2008-01-29 08:38:19 -0500 | [diff] [blame] | 122 | #define SEL_INITCON_INO_OFFSET 0x01000000 |
| 123 | #define SEL_BOOL_INO_OFFSET 0x02000000 |
| 124 | #define SEL_CLASS_INO_OFFSET 0x04000000 |
| 125 | #define SEL_POLICYCAP_INO_OFFSET 0x08000000 |
| 126 | #define SEL_INO_MASK 0x00ffffff |
James Carter | f0ee2e4 | 2007-04-04 10:11:29 -0400 | [diff] [blame] | 127 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 128 | #define TMPBUFLEN 12 |
| 129 | static ssize_t sel_read_enforce(struct file *filp, char __user *buf, |
| 130 | size_t count, loff_t *ppos) |
| 131 | { |
| 132 | char tmpbuf[TMPBUFLEN]; |
| 133 | ssize_t length; |
| 134 | |
| 135 | length = scnprintf(tmpbuf, TMPBUFLEN, "%d", selinux_enforcing); |
| 136 | return simple_read_from_buffer(buf, count, ppos, tmpbuf, length); |
| 137 | } |
| 138 | |
| 139 | #ifdef CONFIG_SECURITY_SELINUX_DEVELOP |
Eric Paris | 1872981 | 2008-04-17 14:15:45 -0400 | [diff] [blame] | 140 | static ssize_t sel_write_enforce(struct file *file, const char __user *buf, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 141 | size_t count, loff_t *ppos) |
| 142 | |
| 143 | { |
Eric Paris | b77a493 | 2010-11-23 11:40:08 -0500 | [diff] [blame^] | 144 | char *page = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 145 | ssize_t length; |
| 146 | int new_value; |
| 147 | |
Eric Paris | b77a493 | 2010-11-23 11:40:08 -0500 | [diff] [blame^] | 148 | length = -ENOMEM; |
Davi Arnaut | bfd5162 | 2005-10-30 14:59:24 -0800 | [diff] [blame] | 149 | if (count >= PAGE_SIZE) |
Eric Paris | b77a493 | 2010-11-23 11:40:08 -0500 | [diff] [blame^] | 150 | goto out; |
| 151 | |
| 152 | /* No partial writes. */ |
| 153 | length = EINVAL; |
| 154 | if (*ppos != 0) |
| 155 | goto out; |
| 156 | |
| 157 | length = -ENOMEM; |
Eric Paris | 1872981 | 2008-04-17 14:15:45 -0400 | [diff] [blame] | 158 | page = (char *)get_zeroed_page(GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 159 | if (!page) |
Eric Paris | b77a493 | 2010-11-23 11:40:08 -0500 | [diff] [blame^] | 160 | goto out; |
| 161 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 162 | length = -EFAULT; |
| 163 | if (copy_from_user(page, buf, count)) |
| 164 | goto out; |
| 165 | |
| 166 | length = -EINVAL; |
| 167 | if (sscanf(page, "%d", &new_value) != 1) |
| 168 | goto out; |
| 169 | |
| 170 | if (new_value != selinux_enforcing) { |
| 171 | length = task_has_security(current, SECURITY__SETENFORCE); |
| 172 | if (length) |
| 173 | goto out; |
Steve Grubb | af601e4 | 2006-01-04 14:08:39 +0000 | [diff] [blame] | 174 | audit_log(current->audit_context, GFP_KERNEL, AUDIT_MAC_STATUS, |
Eric Paris | 4746ec5 | 2008-01-08 10:06:53 -0500 | [diff] [blame] | 175 | "enforcing=%d old_enforcing=%d auid=%u ses=%u", |
| 176 | new_value, selinux_enforcing, |
| 177 | audit_get_loginuid(current), |
| 178 | audit_get_sessionid(current)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 179 | selinux_enforcing = new_value; |
| 180 | if (selinux_enforcing) |
| 181 | avc_ss_reset(0); |
| 182 | selnl_notify_setenforce(selinux_enforcing); |
KaiGai Kohei | 1190416 | 2010-09-14 18:28:39 +0900 | [diff] [blame] | 183 | selinux_status_update_setenforce(selinux_enforcing); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 184 | } |
| 185 | length = count; |
| 186 | out: |
| 187 | free_page((unsigned long) page); |
| 188 | return length; |
| 189 | } |
| 190 | #else |
| 191 | #define sel_write_enforce NULL |
| 192 | #endif |
| 193 | |
Arjan van de Ven | 9c2e08c | 2007-02-12 00:55:37 -0800 | [diff] [blame] | 194 | static const struct file_operations sel_enforce_ops = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 195 | .read = sel_read_enforce, |
| 196 | .write = sel_write_enforce, |
Arnd Bergmann | 57a62c2 | 2010-07-07 23:40:10 +0200 | [diff] [blame] | 197 | .llseek = generic_file_llseek, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 198 | }; |
| 199 | |
Eric Paris | 3f12070 | 2007-09-21 14:37:10 -0400 | [diff] [blame] | 200 | static ssize_t sel_read_handle_unknown(struct file *filp, char __user *buf, |
| 201 | size_t count, loff_t *ppos) |
| 202 | { |
| 203 | char tmpbuf[TMPBUFLEN]; |
| 204 | ssize_t length; |
| 205 | ino_t ino = filp->f_path.dentry->d_inode->i_ino; |
| 206 | int handle_unknown = (ino == SEL_REJECT_UNKNOWN) ? |
| 207 | security_get_reject_unknown() : !security_get_allow_unknown(); |
| 208 | |
| 209 | length = scnprintf(tmpbuf, TMPBUFLEN, "%d", handle_unknown); |
| 210 | return simple_read_from_buffer(buf, count, ppos, tmpbuf, length); |
| 211 | } |
| 212 | |
| 213 | static const struct file_operations sel_handle_unknown_ops = { |
| 214 | .read = sel_read_handle_unknown, |
Arnd Bergmann | 57a62c2 | 2010-07-07 23:40:10 +0200 | [diff] [blame] | 215 | .llseek = generic_file_llseek, |
Eric Paris | 3f12070 | 2007-09-21 14:37:10 -0400 | [diff] [blame] | 216 | }; |
| 217 | |
KaiGai Kohei | 1190416 | 2010-09-14 18:28:39 +0900 | [diff] [blame] | 218 | static int sel_open_handle_status(struct inode *inode, struct file *filp) |
| 219 | { |
| 220 | struct page *status = selinux_kernel_status_page(); |
| 221 | |
| 222 | if (!status) |
| 223 | return -ENOMEM; |
| 224 | |
| 225 | filp->private_data = status; |
| 226 | |
| 227 | return 0; |
| 228 | } |
| 229 | |
| 230 | static ssize_t sel_read_handle_status(struct file *filp, char __user *buf, |
| 231 | size_t count, loff_t *ppos) |
| 232 | { |
| 233 | struct page *status = filp->private_data; |
| 234 | |
| 235 | BUG_ON(!status); |
| 236 | |
| 237 | return simple_read_from_buffer(buf, count, ppos, |
| 238 | page_address(status), |
| 239 | sizeof(struct selinux_kernel_status)); |
| 240 | } |
| 241 | |
| 242 | static int sel_mmap_handle_status(struct file *filp, |
| 243 | struct vm_area_struct *vma) |
| 244 | { |
| 245 | struct page *status = filp->private_data; |
| 246 | unsigned long size = vma->vm_end - vma->vm_start; |
| 247 | |
| 248 | BUG_ON(!status); |
| 249 | |
| 250 | /* only allows one page from the head */ |
| 251 | if (vma->vm_pgoff > 0 || size != PAGE_SIZE) |
| 252 | return -EIO; |
| 253 | /* disallow writable mapping */ |
| 254 | if (vma->vm_flags & VM_WRITE) |
| 255 | return -EPERM; |
| 256 | /* disallow mprotect() turns it into writable */ |
| 257 | vma->vm_flags &= ~VM_MAYWRITE; |
| 258 | |
| 259 | return remap_pfn_range(vma, vma->vm_start, |
| 260 | page_to_pfn(status), |
| 261 | size, vma->vm_page_prot); |
| 262 | } |
| 263 | |
| 264 | static const struct file_operations sel_handle_status_ops = { |
| 265 | .open = sel_open_handle_status, |
| 266 | .read = sel_read_handle_status, |
| 267 | .mmap = sel_mmap_handle_status, |
| 268 | .llseek = generic_file_llseek, |
| 269 | }; |
| 270 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 271 | #ifdef CONFIG_SECURITY_SELINUX_DISABLE |
Eric Paris | 1872981 | 2008-04-17 14:15:45 -0400 | [diff] [blame] | 272 | static ssize_t sel_write_disable(struct file *file, const char __user *buf, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 273 | size_t count, loff_t *ppos) |
| 274 | |
| 275 | { |
Eric Paris | b77a493 | 2010-11-23 11:40:08 -0500 | [diff] [blame^] | 276 | char *page = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 277 | ssize_t length; |
| 278 | int new_value; |
| 279 | extern int selinux_disable(void); |
| 280 | |
Eric Paris | b77a493 | 2010-11-23 11:40:08 -0500 | [diff] [blame^] | 281 | length = -ENOMEM; |
Davi Arnaut | bfd5162 | 2005-10-30 14:59:24 -0800 | [diff] [blame] | 282 | if (count >= PAGE_SIZE) |
Eric Paris | b77a493 | 2010-11-23 11:40:08 -0500 | [diff] [blame^] | 283 | goto out;; |
| 284 | |
| 285 | /* No partial writes. */ |
| 286 | length = -EINVAL; |
| 287 | if (*ppos != 0) |
| 288 | goto out; |
| 289 | |
| 290 | length = -ENOMEM; |
Eric Paris | 1872981 | 2008-04-17 14:15:45 -0400 | [diff] [blame] | 291 | page = (char *)get_zeroed_page(GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 292 | if (!page) |
Eric Paris | b77a493 | 2010-11-23 11:40:08 -0500 | [diff] [blame^] | 293 | goto out; |
| 294 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 295 | length = -EFAULT; |
| 296 | if (copy_from_user(page, buf, count)) |
| 297 | goto out; |
| 298 | |
| 299 | length = -EINVAL; |
| 300 | if (sscanf(page, "%d", &new_value) != 1) |
| 301 | goto out; |
| 302 | |
| 303 | if (new_value) { |
| 304 | length = selinux_disable(); |
Eric Paris | b77a493 | 2010-11-23 11:40:08 -0500 | [diff] [blame^] | 305 | if (length) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 306 | goto out; |
Steve Grubb | af601e4 | 2006-01-04 14:08:39 +0000 | [diff] [blame] | 307 | audit_log(current->audit_context, GFP_KERNEL, AUDIT_MAC_STATUS, |
Eric Paris | 4746ec5 | 2008-01-08 10:06:53 -0500 | [diff] [blame] | 308 | "selinux=0 auid=%u ses=%u", |
| 309 | audit_get_loginuid(current), |
| 310 | audit_get_sessionid(current)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 311 | } |
| 312 | |
| 313 | length = count; |
| 314 | out: |
| 315 | free_page((unsigned long) page); |
| 316 | return length; |
| 317 | } |
| 318 | #else |
| 319 | #define sel_write_disable NULL |
| 320 | #endif |
| 321 | |
Arjan van de Ven | 9c2e08c | 2007-02-12 00:55:37 -0800 | [diff] [blame] | 322 | static const struct file_operations sel_disable_ops = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 323 | .write = sel_write_disable, |
Arnd Bergmann | 57a62c2 | 2010-07-07 23:40:10 +0200 | [diff] [blame] | 324 | .llseek = generic_file_llseek, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 325 | }; |
| 326 | |
| 327 | static ssize_t sel_read_policyvers(struct file *filp, char __user *buf, |
Eric Paris | 1872981 | 2008-04-17 14:15:45 -0400 | [diff] [blame] | 328 | size_t count, loff_t *ppos) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 329 | { |
| 330 | char tmpbuf[TMPBUFLEN]; |
| 331 | ssize_t length; |
| 332 | |
| 333 | length = scnprintf(tmpbuf, TMPBUFLEN, "%u", POLICYDB_VERSION_MAX); |
| 334 | return simple_read_from_buffer(buf, count, ppos, tmpbuf, length); |
| 335 | } |
| 336 | |
Arjan van de Ven | 9c2e08c | 2007-02-12 00:55:37 -0800 | [diff] [blame] | 337 | static const struct file_operations sel_policyvers_ops = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 338 | .read = sel_read_policyvers, |
Arnd Bergmann | 57a62c2 | 2010-07-07 23:40:10 +0200 | [diff] [blame] | 339 | .llseek = generic_file_llseek, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 340 | }; |
| 341 | |
| 342 | /* declaration for sel_write_load */ |
| 343 | static int sel_make_bools(void); |
Christopher J. PeBenito | e47c8fc | 2007-05-23 09:12:09 -0400 | [diff] [blame] | 344 | static int sel_make_classes(void); |
Paul Moore | 3bb56b2 | 2008-01-29 08:38:19 -0500 | [diff] [blame] | 345 | static int sel_make_policycap(void); |
Christopher J. PeBenito | e47c8fc | 2007-05-23 09:12:09 -0400 | [diff] [blame] | 346 | |
| 347 | /* declaration for sel_make_class_dirs */ |
| 348 | static int sel_make_dir(struct inode *dir, struct dentry *dentry, |
| 349 | unsigned long *ino); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 350 | |
| 351 | static ssize_t sel_read_mls(struct file *filp, char __user *buf, |
| 352 | size_t count, loff_t *ppos) |
| 353 | { |
| 354 | char tmpbuf[TMPBUFLEN]; |
| 355 | ssize_t length; |
| 356 | |
Guido Trentalancia | 0719aaf | 2010-02-03 16:40:20 +0100 | [diff] [blame] | 357 | length = scnprintf(tmpbuf, TMPBUFLEN, "%d", |
| 358 | security_mls_enabled()); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 359 | return simple_read_from_buffer(buf, count, ppos, tmpbuf, length); |
| 360 | } |
| 361 | |
Arjan van de Ven | 9c2e08c | 2007-02-12 00:55:37 -0800 | [diff] [blame] | 362 | static const struct file_operations sel_mls_ops = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 363 | .read = sel_read_mls, |
Arnd Bergmann | 57a62c2 | 2010-07-07 23:40:10 +0200 | [diff] [blame] | 364 | .llseek = generic_file_llseek, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 365 | }; |
| 366 | |
Eric Paris | cee74f4 | 2010-10-13 17:50:25 -0400 | [diff] [blame] | 367 | struct policy_load_memory { |
| 368 | size_t len; |
| 369 | void *data; |
| 370 | }; |
| 371 | |
| 372 | static int sel_open_policy(struct inode *inode, struct file *filp) |
| 373 | { |
| 374 | struct policy_load_memory *plm = NULL; |
| 375 | int rc; |
| 376 | |
| 377 | BUG_ON(filp->private_data); |
| 378 | |
| 379 | mutex_lock(&sel_mutex); |
| 380 | |
| 381 | rc = task_has_security(current, SECURITY__READ_POLICY); |
| 382 | if (rc) |
| 383 | goto err; |
| 384 | |
| 385 | rc = -EBUSY; |
| 386 | if (policy_opened) |
| 387 | goto err; |
| 388 | |
| 389 | rc = -ENOMEM; |
| 390 | plm = kzalloc(sizeof(*plm), GFP_KERNEL); |
| 391 | if (!plm) |
| 392 | goto err; |
| 393 | |
| 394 | if (i_size_read(inode) != security_policydb_len()) { |
| 395 | mutex_lock(&inode->i_mutex); |
| 396 | i_size_write(inode, security_policydb_len()); |
| 397 | mutex_unlock(&inode->i_mutex); |
| 398 | } |
| 399 | |
| 400 | rc = security_read_policy(&plm->data, &plm->len); |
| 401 | if (rc) |
| 402 | goto err; |
| 403 | |
| 404 | policy_opened = 1; |
| 405 | |
| 406 | filp->private_data = plm; |
| 407 | |
| 408 | mutex_unlock(&sel_mutex); |
| 409 | |
| 410 | return 0; |
| 411 | err: |
| 412 | mutex_unlock(&sel_mutex); |
| 413 | |
| 414 | if (plm) |
| 415 | vfree(plm->data); |
| 416 | kfree(plm); |
| 417 | return rc; |
| 418 | } |
| 419 | |
| 420 | static int sel_release_policy(struct inode *inode, struct file *filp) |
| 421 | { |
| 422 | struct policy_load_memory *plm = filp->private_data; |
| 423 | |
| 424 | BUG_ON(!plm); |
| 425 | |
| 426 | policy_opened = 0; |
| 427 | |
| 428 | vfree(plm->data); |
| 429 | kfree(plm); |
| 430 | |
| 431 | return 0; |
| 432 | } |
| 433 | |
| 434 | static ssize_t sel_read_policy(struct file *filp, char __user *buf, |
| 435 | size_t count, loff_t *ppos) |
| 436 | { |
| 437 | struct policy_load_memory *plm = filp->private_data; |
| 438 | int ret; |
| 439 | |
| 440 | mutex_lock(&sel_mutex); |
| 441 | |
| 442 | ret = task_has_security(current, SECURITY__READ_POLICY); |
| 443 | if (ret) |
| 444 | goto out; |
| 445 | |
| 446 | ret = simple_read_from_buffer(buf, count, ppos, plm->data, plm->len); |
| 447 | out: |
| 448 | mutex_unlock(&sel_mutex); |
| 449 | return ret; |
| 450 | } |
| 451 | |
Eric Paris | 845ca30 | 2010-10-13 17:50:31 -0400 | [diff] [blame] | 452 | static int sel_mmap_policy_fault(struct vm_area_struct *vma, |
| 453 | struct vm_fault *vmf) |
| 454 | { |
| 455 | struct policy_load_memory *plm = vma->vm_file->private_data; |
| 456 | unsigned long offset; |
| 457 | struct page *page; |
| 458 | |
| 459 | if (vmf->flags & (FAULT_FLAG_MKWRITE | FAULT_FLAG_WRITE)) |
| 460 | return VM_FAULT_SIGBUS; |
| 461 | |
| 462 | offset = vmf->pgoff << PAGE_SHIFT; |
| 463 | if (offset >= roundup(plm->len, PAGE_SIZE)) |
| 464 | return VM_FAULT_SIGBUS; |
| 465 | |
| 466 | page = vmalloc_to_page(plm->data + offset); |
| 467 | get_page(page); |
| 468 | |
| 469 | vmf->page = page; |
| 470 | |
| 471 | return 0; |
| 472 | } |
| 473 | |
| 474 | static struct vm_operations_struct sel_mmap_policy_ops = { |
| 475 | .fault = sel_mmap_policy_fault, |
| 476 | .page_mkwrite = sel_mmap_policy_fault, |
| 477 | }; |
| 478 | |
| 479 | int sel_mmap_policy(struct file *filp, struct vm_area_struct *vma) |
| 480 | { |
| 481 | if (vma->vm_flags & VM_SHARED) { |
| 482 | /* do not allow mprotect to make mapping writable */ |
| 483 | vma->vm_flags &= ~VM_MAYWRITE; |
| 484 | |
| 485 | if (vma->vm_flags & VM_WRITE) |
| 486 | return -EACCES; |
| 487 | } |
| 488 | |
| 489 | vma->vm_flags |= VM_RESERVED; |
| 490 | vma->vm_ops = &sel_mmap_policy_ops; |
| 491 | |
| 492 | return 0; |
| 493 | } |
| 494 | |
Eric Paris | cee74f4 | 2010-10-13 17:50:25 -0400 | [diff] [blame] | 495 | static const struct file_operations sel_policy_ops = { |
| 496 | .open = sel_open_policy, |
| 497 | .read = sel_read_policy, |
Eric Paris | 845ca30 | 2010-10-13 17:50:31 -0400 | [diff] [blame] | 498 | .mmap = sel_mmap_policy, |
Eric Paris | cee74f4 | 2010-10-13 17:50:25 -0400 | [diff] [blame] | 499 | .release = sel_release_policy, |
| 500 | }; |
| 501 | |
Eric Paris | 1872981 | 2008-04-17 14:15:45 -0400 | [diff] [blame] | 502 | static ssize_t sel_write_load(struct file *file, const char __user *buf, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 503 | size_t count, loff_t *ppos) |
| 504 | |
| 505 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 506 | ssize_t length; |
| 507 | void *data = NULL; |
| 508 | |
Ingo Molnar | bb00307 | 2006-03-22 00:09:14 -0800 | [diff] [blame] | 509 | mutex_lock(&sel_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 510 | |
| 511 | length = task_has_security(current, SECURITY__LOAD_POLICY); |
| 512 | if (length) |
| 513 | goto out; |
| 514 | |
Eric Paris | b77a493 | 2010-11-23 11:40:08 -0500 | [diff] [blame^] | 515 | /* No partial writes. */ |
| 516 | length = -EINVAL; |
| 517 | if (*ppos != 0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 518 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 519 | |
Eric Paris | b77a493 | 2010-11-23 11:40:08 -0500 | [diff] [blame^] | 520 | length = -EFBIG; |
| 521 | if (count > 64 * 1024 * 1024) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 522 | goto out; |
Eric Paris | b77a493 | 2010-11-23 11:40:08 -0500 | [diff] [blame^] | 523 | |
| 524 | length = -ENOMEM; |
| 525 | data = vmalloc(count); |
| 526 | if (!data) |
| 527 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 528 | |
| 529 | length = -EFAULT; |
| 530 | if (copy_from_user(data, buf, count) != 0) |
| 531 | goto out; |
| 532 | |
| 533 | length = security_load_policy(data, count); |
| 534 | if (length) |
| 535 | goto out; |
| 536 | |
Eric Paris | b77a493 | 2010-11-23 11:40:08 -0500 | [diff] [blame^] | 537 | length = sel_make_bools(); |
| 538 | if (length) |
Christopher J. PeBenito | e47c8fc | 2007-05-23 09:12:09 -0400 | [diff] [blame] | 539 | goto out1; |
Christopher J. PeBenito | e47c8fc | 2007-05-23 09:12:09 -0400 | [diff] [blame] | 540 | |
Eric Paris | b77a493 | 2010-11-23 11:40:08 -0500 | [diff] [blame^] | 541 | length = sel_make_classes(); |
| 542 | if (length) |
Paul Moore | 3bb56b2 | 2008-01-29 08:38:19 -0500 | [diff] [blame] | 543 | goto out1; |
Paul Moore | 3bb56b2 | 2008-01-29 08:38:19 -0500 | [diff] [blame] | 544 | |
Eric Paris | b77a493 | 2010-11-23 11:40:08 -0500 | [diff] [blame^] | 545 | length = sel_make_policycap(); |
| 546 | if (length) |
| 547 | goto out1; |
| 548 | |
| 549 | length = count; |
Christopher J. PeBenito | e47c8fc | 2007-05-23 09:12:09 -0400 | [diff] [blame] | 550 | |
| 551 | out1: |
Steve Grubb | af601e4 | 2006-01-04 14:08:39 +0000 | [diff] [blame] | 552 | audit_log(current->audit_context, GFP_KERNEL, AUDIT_MAC_POLICY_LOAD, |
Eric Paris | 4746ec5 | 2008-01-08 10:06:53 -0500 | [diff] [blame] | 553 | "policy loaded auid=%u ses=%u", |
| 554 | audit_get_loginuid(current), |
| 555 | audit_get_sessionid(current)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 556 | out: |
Ingo Molnar | bb00307 | 2006-03-22 00:09:14 -0800 | [diff] [blame] | 557 | mutex_unlock(&sel_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 558 | vfree(data); |
| 559 | return length; |
| 560 | } |
| 561 | |
Arjan van de Ven | 9c2e08c | 2007-02-12 00:55:37 -0800 | [diff] [blame] | 562 | static const struct file_operations sel_load_ops = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 563 | .write = sel_write_load, |
Arnd Bergmann | 57a62c2 | 2010-07-07 23:40:10 +0200 | [diff] [blame] | 564 | .llseek = generic_file_llseek, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 565 | }; |
| 566 | |
Eric Paris | 1872981 | 2008-04-17 14:15:45 -0400 | [diff] [blame] | 567 | static ssize_t sel_write_context(struct file *file, char *buf, size_t size) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 568 | { |
Eric Paris | b77a493 | 2010-11-23 11:40:08 -0500 | [diff] [blame^] | 569 | char *canon = NULL; |
Stephen Smalley | ce9982d | 2005-11-08 21:34:33 -0800 | [diff] [blame] | 570 | u32 sid, len; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 571 | ssize_t length; |
| 572 | |
| 573 | length = task_has_security(current, SECURITY__CHECK_CONTEXT); |
| 574 | if (length) |
Eric Paris | b77a493 | 2010-11-23 11:40:08 -0500 | [diff] [blame^] | 575 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 576 | |
Stephen Smalley | ce9982d | 2005-11-08 21:34:33 -0800 | [diff] [blame] | 577 | length = security_context_to_sid(buf, size, &sid); |
Eric Paris | b77a493 | 2010-11-23 11:40:08 -0500 | [diff] [blame^] | 578 | if (length) |
| 579 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 580 | |
Stephen Smalley | ce9982d | 2005-11-08 21:34:33 -0800 | [diff] [blame] | 581 | length = security_sid_to_context(sid, &canon, &len); |
Eric Paris | b77a493 | 2010-11-23 11:40:08 -0500 | [diff] [blame^] | 582 | if (length) |
| 583 | goto out; |
Stephen Smalley | ce9982d | 2005-11-08 21:34:33 -0800 | [diff] [blame] | 584 | |
Eric Paris | b77a493 | 2010-11-23 11:40:08 -0500 | [diff] [blame^] | 585 | length = -ERANGE; |
Stephen Smalley | ce9982d | 2005-11-08 21:34:33 -0800 | [diff] [blame] | 586 | if (len > SIMPLE_TRANSACTION_LIMIT) { |
Eric Paris | 744ba35 | 2008-04-17 11:52:44 -0400 | [diff] [blame] | 587 | printk(KERN_ERR "SELinux: %s: context size (%u) exceeds " |
| 588 | "payload max\n", __func__, len); |
Stephen Smalley | ce9982d | 2005-11-08 21:34:33 -0800 | [diff] [blame] | 589 | goto out; |
| 590 | } |
| 591 | |
| 592 | memcpy(buf, canon, len); |
| 593 | length = len; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 594 | out: |
Stephen Smalley | ce9982d | 2005-11-08 21:34:33 -0800 | [diff] [blame] | 595 | kfree(canon); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 596 | return length; |
| 597 | } |
| 598 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 599 | static ssize_t sel_read_checkreqprot(struct file *filp, char __user *buf, |
| 600 | size_t count, loff_t *ppos) |
| 601 | { |
| 602 | char tmpbuf[TMPBUFLEN]; |
| 603 | ssize_t length; |
| 604 | |
| 605 | length = scnprintf(tmpbuf, TMPBUFLEN, "%u", selinux_checkreqprot); |
| 606 | return simple_read_from_buffer(buf, count, ppos, tmpbuf, length); |
| 607 | } |
| 608 | |
Eric Paris | 1872981 | 2008-04-17 14:15:45 -0400 | [diff] [blame] | 609 | static ssize_t sel_write_checkreqprot(struct file *file, const char __user *buf, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 610 | size_t count, loff_t *ppos) |
| 611 | { |
Eric Paris | b77a493 | 2010-11-23 11:40:08 -0500 | [diff] [blame^] | 612 | char *page = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 613 | ssize_t length; |
| 614 | unsigned int new_value; |
| 615 | |
| 616 | length = task_has_security(current, SECURITY__SETCHECKREQPROT); |
| 617 | if (length) |
Eric Paris | b77a493 | 2010-11-23 11:40:08 -0500 | [diff] [blame^] | 618 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 619 | |
Eric Paris | b77a493 | 2010-11-23 11:40:08 -0500 | [diff] [blame^] | 620 | length = -ENOMEM; |
Davi Arnaut | bfd5162 | 2005-10-30 14:59:24 -0800 | [diff] [blame] | 621 | if (count >= PAGE_SIZE) |
Eric Paris | b77a493 | 2010-11-23 11:40:08 -0500 | [diff] [blame^] | 622 | goto out; |
| 623 | |
| 624 | /* No partial writes. */ |
| 625 | length = -EINVAL; |
| 626 | if (*ppos != 0) |
| 627 | goto out; |
| 628 | |
| 629 | length = -ENOMEM; |
Eric Paris | 1872981 | 2008-04-17 14:15:45 -0400 | [diff] [blame] | 630 | page = (char *)get_zeroed_page(GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 631 | if (!page) |
Eric Paris | b77a493 | 2010-11-23 11:40:08 -0500 | [diff] [blame^] | 632 | goto out; |
| 633 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 634 | length = -EFAULT; |
| 635 | if (copy_from_user(page, buf, count)) |
| 636 | goto out; |
| 637 | |
| 638 | length = -EINVAL; |
| 639 | if (sscanf(page, "%u", &new_value) != 1) |
| 640 | goto out; |
| 641 | |
| 642 | selinux_checkreqprot = new_value ? 1 : 0; |
| 643 | length = count; |
| 644 | out: |
| 645 | free_page((unsigned long) page); |
| 646 | return length; |
| 647 | } |
Arjan van de Ven | 9c2e08c | 2007-02-12 00:55:37 -0800 | [diff] [blame] | 648 | static const struct file_operations sel_checkreqprot_ops = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 649 | .read = sel_read_checkreqprot, |
| 650 | .write = sel_write_checkreqprot, |
Arnd Bergmann | 57a62c2 | 2010-07-07 23:40:10 +0200 | [diff] [blame] | 651 | .llseek = generic_file_llseek, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 652 | }; |
| 653 | |
| 654 | /* |
| 655 | * Remaining nodes use transaction based IO methods like nfsd/nfsctl.c |
| 656 | */ |
Eric Paris | 1872981 | 2008-04-17 14:15:45 -0400 | [diff] [blame] | 657 | static ssize_t sel_write_access(struct file *file, char *buf, size_t size); |
| 658 | static ssize_t sel_write_create(struct file *file, char *buf, size_t size); |
| 659 | static ssize_t sel_write_relabel(struct file *file, char *buf, size_t size); |
| 660 | static ssize_t sel_write_user(struct file *file, char *buf, size_t size); |
| 661 | static ssize_t sel_write_member(struct file *file, char *buf, size_t size); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 662 | |
| 663 | static ssize_t (*write_op[])(struct file *, char *, size_t) = { |
| 664 | [SEL_ACCESS] = sel_write_access, |
| 665 | [SEL_CREATE] = sel_write_create, |
| 666 | [SEL_RELABEL] = sel_write_relabel, |
| 667 | [SEL_USER] = sel_write_user, |
| 668 | [SEL_MEMBER] = sel_write_member, |
Stephen Smalley | ce9982d | 2005-11-08 21:34:33 -0800 | [diff] [blame] | 669 | [SEL_CONTEXT] = sel_write_context, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 670 | }; |
| 671 | |
| 672 | static ssize_t selinux_transaction_write(struct file *file, const char __user *buf, size_t size, loff_t *pos) |
| 673 | { |
Eric Paris | 1872981 | 2008-04-17 14:15:45 -0400 | [diff] [blame] | 674 | ino_t ino = file->f_path.dentry->d_inode->i_ino; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 675 | char *data; |
| 676 | ssize_t rv; |
| 677 | |
Nicolas Kaiser | 6e20a64 | 2006-01-06 00:11:22 -0800 | [diff] [blame] | 678 | if (ino >= ARRAY_SIZE(write_op) || !write_op[ino]) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 679 | return -EINVAL; |
| 680 | |
| 681 | data = simple_transaction_get(file, buf, size); |
| 682 | if (IS_ERR(data)) |
| 683 | return PTR_ERR(data); |
| 684 | |
Eric Paris | 1872981 | 2008-04-17 14:15:45 -0400 | [diff] [blame] | 685 | rv = write_op[ino](file, data, size); |
| 686 | if (rv > 0) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 687 | simple_transaction_set(file, rv); |
| 688 | rv = size; |
| 689 | } |
| 690 | return rv; |
| 691 | } |
| 692 | |
Arjan van de Ven | 9c2e08c | 2007-02-12 00:55:37 -0800 | [diff] [blame] | 693 | static const struct file_operations transaction_ops = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 694 | .write = selinux_transaction_write, |
| 695 | .read = simple_transaction_read, |
| 696 | .release = simple_transaction_release, |
Arnd Bergmann | 57a62c2 | 2010-07-07 23:40:10 +0200 | [diff] [blame] | 697 | .llseek = generic_file_llseek, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 698 | }; |
| 699 | |
| 700 | /* |
| 701 | * payload - write methods |
| 702 | * If the method has a response, the response should be put in buf, |
| 703 | * and the length returned. Otherwise return 0 or and -error. |
| 704 | */ |
| 705 | |
Eric Paris | 1872981 | 2008-04-17 14:15:45 -0400 | [diff] [blame] | 706 | static ssize_t sel_write_access(struct file *file, char *buf, size_t size) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 707 | { |
Eric Paris | b77a493 | 2010-11-23 11:40:08 -0500 | [diff] [blame^] | 708 | char *scon = NULL, *tcon = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 709 | u32 ssid, tsid; |
| 710 | u16 tclass; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 711 | struct av_decision avd; |
| 712 | ssize_t length; |
| 713 | |
| 714 | length = task_has_security(current, SECURITY__COMPUTE_AV); |
| 715 | if (length) |
Eric Paris | b77a493 | 2010-11-23 11:40:08 -0500 | [diff] [blame^] | 716 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 717 | |
| 718 | length = -ENOMEM; |
wzt.wzt@gmail.com | c1a7368 | 2010-04-09 19:30:29 +0800 | [diff] [blame] | 719 | scon = kzalloc(size + 1, GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 720 | if (!scon) |
Eric Paris | b77a493 | 2010-11-23 11:40:08 -0500 | [diff] [blame^] | 721 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 722 | |
Eric Paris | b77a493 | 2010-11-23 11:40:08 -0500 | [diff] [blame^] | 723 | length = -ENOMEM; |
wzt.wzt@gmail.com | c1a7368 | 2010-04-09 19:30:29 +0800 | [diff] [blame] | 724 | tcon = kzalloc(size + 1, GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 725 | if (!tcon) |
| 726 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 727 | |
| 728 | length = -EINVAL; |
Stephen Smalley | 19439d0 | 2010-01-14 17:28:10 -0500 | [diff] [blame] | 729 | if (sscanf(buf, "%s %s %hu", scon, tcon, &tclass) != 3) |
Eric Paris | b77a493 | 2010-11-23 11:40:08 -0500 | [diff] [blame^] | 730 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 731 | |
wzt.wzt@gmail.com | c1a7368 | 2010-04-09 19:30:29 +0800 | [diff] [blame] | 732 | length = security_context_to_sid(scon, strlen(scon) + 1, &ssid); |
Eric Paris | b77a493 | 2010-11-23 11:40:08 -0500 | [diff] [blame^] | 733 | if (length) |
| 734 | goto out; |
| 735 | |
wzt.wzt@gmail.com | c1a7368 | 2010-04-09 19:30:29 +0800 | [diff] [blame] | 736 | length = security_context_to_sid(tcon, strlen(tcon) + 1, &tsid); |
Eric Paris | b77a493 | 2010-11-23 11:40:08 -0500 | [diff] [blame^] | 737 | if (length) |
| 738 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 739 | |
Stephen Smalley | 19439d0 | 2010-01-14 17:28:10 -0500 | [diff] [blame] | 740 | security_compute_av_user(ssid, tsid, tclass, &avd); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 741 | |
| 742 | length = scnprintf(buf, SIMPLE_TRANSACTION_LIMIT, |
KaiGai Kohei | 8a6f83a | 2009-04-01 10:07:57 +0900 | [diff] [blame] | 743 | "%x %x %x %x %u %x", |
Eric Paris | f1c6381 | 2009-02-12 14:50:54 -0500 | [diff] [blame] | 744 | avd.allowed, 0xffffffff, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 745 | avd.auditallow, avd.auditdeny, |
KaiGai Kohei | 8a6f83a | 2009-04-01 10:07:57 +0900 | [diff] [blame] | 746 | avd.seqno, avd.flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 747 | out: |
Eric Paris | b77a493 | 2010-11-23 11:40:08 -0500 | [diff] [blame^] | 748 | kfree(tcon); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 749 | kfree(scon); |
| 750 | return length; |
| 751 | } |
| 752 | |
Eric Paris | 1872981 | 2008-04-17 14:15:45 -0400 | [diff] [blame] | 753 | static ssize_t sel_write_create(struct file *file, char *buf, size_t size) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 754 | { |
Eric Paris | b77a493 | 2010-11-23 11:40:08 -0500 | [diff] [blame^] | 755 | char *scon = NULL, *tcon = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 756 | u32 ssid, tsid, newsid; |
| 757 | u16 tclass; |
| 758 | ssize_t length; |
Eric Paris | b77a493 | 2010-11-23 11:40:08 -0500 | [diff] [blame^] | 759 | char *newcon = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 760 | u32 len; |
| 761 | |
| 762 | length = task_has_security(current, SECURITY__COMPUTE_CREATE); |
| 763 | if (length) |
Eric Paris | b77a493 | 2010-11-23 11:40:08 -0500 | [diff] [blame^] | 764 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 765 | |
| 766 | length = -ENOMEM; |
wzt.wzt@gmail.com | c1a7368 | 2010-04-09 19:30:29 +0800 | [diff] [blame] | 767 | scon = kzalloc(size + 1, GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 768 | if (!scon) |
Eric Paris | b77a493 | 2010-11-23 11:40:08 -0500 | [diff] [blame^] | 769 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 770 | |
Eric Paris | b77a493 | 2010-11-23 11:40:08 -0500 | [diff] [blame^] | 771 | length = -ENOMEM; |
wzt.wzt@gmail.com | c1a7368 | 2010-04-09 19:30:29 +0800 | [diff] [blame] | 772 | tcon = kzalloc(size + 1, GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 773 | if (!tcon) |
| 774 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 775 | |
| 776 | length = -EINVAL; |
| 777 | if (sscanf(buf, "%s %s %hu", scon, tcon, &tclass) != 3) |
Eric Paris | b77a493 | 2010-11-23 11:40:08 -0500 | [diff] [blame^] | 778 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 779 | |
wzt.wzt@gmail.com | c1a7368 | 2010-04-09 19:30:29 +0800 | [diff] [blame] | 780 | length = security_context_to_sid(scon, strlen(scon) + 1, &ssid); |
Eric Paris | b77a493 | 2010-11-23 11:40:08 -0500 | [diff] [blame^] | 781 | if (length) |
| 782 | goto out; |
| 783 | |
wzt.wzt@gmail.com | c1a7368 | 2010-04-09 19:30:29 +0800 | [diff] [blame] | 784 | length = security_context_to_sid(tcon, strlen(tcon) + 1, &tsid); |
Eric Paris | b77a493 | 2010-11-23 11:40:08 -0500 | [diff] [blame^] | 785 | if (length) |
| 786 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 787 | |
Stephen Smalley | c6d3aaa | 2009-09-30 13:37:50 -0400 | [diff] [blame] | 788 | length = security_transition_sid_user(ssid, tsid, tclass, &newsid); |
Eric Paris | b77a493 | 2010-11-23 11:40:08 -0500 | [diff] [blame^] | 789 | if (length) |
| 790 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 791 | |
| 792 | length = security_sid_to_context(newsid, &newcon, &len); |
Eric Paris | b77a493 | 2010-11-23 11:40:08 -0500 | [diff] [blame^] | 793 | if (length) |
| 794 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 795 | |
Eric Paris | b77a493 | 2010-11-23 11:40:08 -0500 | [diff] [blame^] | 796 | length = -ERANGE; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 797 | if (len > SIMPLE_TRANSACTION_LIMIT) { |
Eric Paris | 744ba35 | 2008-04-17 11:52:44 -0400 | [diff] [blame] | 798 | printk(KERN_ERR "SELinux: %s: context size (%u) exceeds " |
| 799 | "payload max\n", __func__, len); |
Eric Paris | b77a493 | 2010-11-23 11:40:08 -0500 | [diff] [blame^] | 800 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 801 | } |
| 802 | |
| 803 | memcpy(buf, newcon, len); |
| 804 | length = len; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 805 | out: |
Eric Paris | b77a493 | 2010-11-23 11:40:08 -0500 | [diff] [blame^] | 806 | kfree(newcon); |
| 807 | kfree(tcon); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 808 | kfree(scon); |
| 809 | return length; |
| 810 | } |
| 811 | |
Eric Paris | 1872981 | 2008-04-17 14:15:45 -0400 | [diff] [blame] | 812 | static ssize_t sel_write_relabel(struct file *file, char *buf, size_t size) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 813 | { |
Eric Paris | b77a493 | 2010-11-23 11:40:08 -0500 | [diff] [blame^] | 814 | char *scon = NULL, *tcon = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 815 | u32 ssid, tsid, newsid; |
| 816 | u16 tclass; |
| 817 | ssize_t length; |
Eric Paris | b77a493 | 2010-11-23 11:40:08 -0500 | [diff] [blame^] | 818 | char *newcon = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 819 | u32 len; |
| 820 | |
| 821 | length = task_has_security(current, SECURITY__COMPUTE_RELABEL); |
| 822 | if (length) |
Eric Paris | b77a493 | 2010-11-23 11:40:08 -0500 | [diff] [blame^] | 823 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 824 | |
| 825 | length = -ENOMEM; |
wzt.wzt@gmail.com | c1a7368 | 2010-04-09 19:30:29 +0800 | [diff] [blame] | 826 | scon = kzalloc(size + 1, GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 827 | if (!scon) |
Eric Paris | b77a493 | 2010-11-23 11:40:08 -0500 | [diff] [blame^] | 828 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 829 | |
Eric Paris | b77a493 | 2010-11-23 11:40:08 -0500 | [diff] [blame^] | 830 | length = -ENOMEM; |
wzt.wzt@gmail.com | c1a7368 | 2010-04-09 19:30:29 +0800 | [diff] [blame] | 831 | tcon = kzalloc(size + 1, GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 832 | if (!tcon) |
| 833 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 834 | |
| 835 | length = -EINVAL; |
| 836 | if (sscanf(buf, "%s %s %hu", scon, tcon, &tclass) != 3) |
Eric Paris | b77a493 | 2010-11-23 11:40:08 -0500 | [diff] [blame^] | 837 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 838 | |
wzt.wzt@gmail.com | c1a7368 | 2010-04-09 19:30:29 +0800 | [diff] [blame] | 839 | length = security_context_to_sid(scon, strlen(scon) + 1, &ssid); |
Eric Paris | b77a493 | 2010-11-23 11:40:08 -0500 | [diff] [blame^] | 840 | if (length) |
| 841 | goto out; |
| 842 | |
wzt.wzt@gmail.com | c1a7368 | 2010-04-09 19:30:29 +0800 | [diff] [blame] | 843 | length = security_context_to_sid(tcon, strlen(tcon) + 1, &tsid); |
Eric Paris | b77a493 | 2010-11-23 11:40:08 -0500 | [diff] [blame^] | 844 | if (length) |
| 845 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 846 | |
| 847 | length = security_change_sid(ssid, tsid, tclass, &newsid); |
Eric Paris | b77a493 | 2010-11-23 11:40:08 -0500 | [diff] [blame^] | 848 | if (length) |
| 849 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 850 | |
| 851 | length = security_sid_to_context(newsid, &newcon, &len); |
Eric Paris | b77a493 | 2010-11-23 11:40:08 -0500 | [diff] [blame^] | 852 | if (length) |
| 853 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 854 | |
Eric Paris | b77a493 | 2010-11-23 11:40:08 -0500 | [diff] [blame^] | 855 | length = -ERANGE; |
| 856 | if (len > SIMPLE_TRANSACTION_LIMIT) |
| 857 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 858 | |
| 859 | memcpy(buf, newcon, len); |
| 860 | length = len; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 861 | out: |
Eric Paris | b77a493 | 2010-11-23 11:40:08 -0500 | [diff] [blame^] | 862 | kfree(newcon); |
| 863 | kfree(tcon); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 864 | kfree(scon); |
| 865 | return length; |
| 866 | } |
| 867 | |
Eric Paris | 1872981 | 2008-04-17 14:15:45 -0400 | [diff] [blame] | 868 | static ssize_t sel_write_user(struct file *file, char *buf, size_t size) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 869 | { |
Eric Paris | b77a493 | 2010-11-23 11:40:08 -0500 | [diff] [blame^] | 870 | char *con = NULL, *user = NULL, *ptr; |
| 871 | u32 sid, *sids = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 872 | ssize_t length; |
| 873 | char *newcon; |
| 874 | int i, rc; |
| 875 | u32 len, nsids; |
| 876 | |
| 877 | length = task_has_security(current, SECURITY__COMPUTE_USER); |
| 878 | if (length) |
Eric Paris | b77a493 | 2010-11-23 11:40:08 -0500 | [diff] [blame^] | 879 | goto out;; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 880 | |
| 881 | length = -ENOMEM; |
wzt.wzt@gmail.com | c1a7368 | 2010-04-09 19:30:29 +0800 | [diff] [blame] | 882 | con = kzalloc(size + 1, GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 883 | if (!con) |
Eric Paris | b77a493 | 2010-11-23 11:40:08 -0500 | [diff] [blame^] | 884 | goto out;; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 885 | |
Eric Paris | b77a493 | 2010-11-23 11:40:08 -0500 | [diff] [blame^] | 886 | length = -ENOMEM; |
wzt.wzt@gmail.com | c1a7368 | 2010-04-09 19:30:29 +0800 | [diff] [blame] | 887 | user = kzalloc(size + 1, GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 888 | if (!user) |
| 889 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 890 | |
| 891 | length = -EINVAL; |
| 892 | if (sscanf(buf, "%s %s", con, user) != 2) |
Eric Paris | b77a493 | 2010-11-23 11:40:08 -0500 | [diff] [blame^] | 893 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 894 | |
wzt.wzt@gmail.com | c1a7368 | 2010-04-09 19:30:29 +0800 | [diff] [blame] | 895 | length = security_context_to_sid(con, strlen(con) + 1, &sid); |
Eric Paris | b77a493 | 2010-11-23 11:40:08 -0500 | [diff] [blame^] | 896 | if (length) |
| 897 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 898 | |
| 899 | length = security_get_user_sids(sid, user, &sids, &nsids); |
Eric Paris | b77a493 | 2010-11-23 11:40:08 -0500 | [diff] [blame^] | 900 | if (length) |
| 901 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 902 | |
| 903 | length = sprintf(buf, "%u", nsids) + 1; |
| 904 | ptr = buf + length; |
| 905 | for (i = 0; i < nsids; i++) { |
| 906 | rc = security_sid_to_context(sids[i], &newcon, &len); |
| 907 | if (rc) { |
| 908 | length = rc; |
Eric Paris | b77a493 | 2010-11-23 11:40:08 -0500 | [diff] [blame^] | 909 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 910 | } |
| 911 | if ((length + len) >= SIMPLE_TRANSACTION_LIMIT) { |
| 912 | kfree(newcon); |
| 913 | length = -ERANGE; |
Eric Paris | b77a493 | 2010-11-23 11:40:08 -0500 | [diff] [blame^] | 914 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 915 | } |
| 916 | memcpy(ptr, newcon, len); |
| 917 | kfree(newcon); |
| 918 | ptr += len; |
| 919 | length += len; |
| 920 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 921 | out: |
Eric Paris | b77a493 | 2010-11-23 11:40:08 -0500 | [diff] [blame^] | 922 | kfree(sids); |
| 923 | kfree(user); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 924 | kfree(con); |
| 925 | return length; |
| 926 | } |
| 927 | |
Eric Paris | 1872981 | 2008-04-17 14:15:45 -0400 | [diff] [blame] | 928 | static ssize_t sel_write_member(struct file *file, char *buf, size_t size) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 929 | { |
Eric Paris | b77a493 | 2010-11-23 11:40:08 -0500 | [diff] [blame^] | 930 | char *scon = NULL, *tcon = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 931 | u32 ssid, tsid, newsid; |
| 932 | u16 tclass; |
| 933 | ssize_t length; |
Eric Paris | b77a493 | 2010-11-23 11:40:08 -0500 | [diff] [blame^] | 934 | char *newcon = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 935 | u32 len; |
| 936 | |
| 937 | length = task_has_security(current, SECURITY__COMPUTE_MEMBER); |
| 938 | if (length) |
Eric Paris | b77a493 | 2010-11-23 11:40:08 -0500 | [diff] [blame^] | 939 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 940 | |
| 941 | length = -ENOMEM; |
wzt.wzt@gmail.com | c1a7368 | 2010-04-09 19:30:29 +0800 | [diff] [blame] | 942 | scon = kzalloc(size + 1, GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 943 | if (!scon) |
Eric Paris | b77a493 | 2010-11-23 11:40:08 -0500 | [diff] [blame^] | 944 | goto out;; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 945 | |
Eric Paris | b77a493 | 2010-11-23 11:40:08 -0500 | [diff] [blame^] | 946 | length = -ENOMEM; |
wzt.wzt@gmail.com | c1a7368 | 2010-04-09 19:30:29 +0800 | [diff] [blame] | 947 | tcon = kzalloc(size + 1, GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 948 | if (!tcon) |
| 949 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 950 | |
| 951 | length = -EINVAL; |
| 952 | if (sscanf(buf, "%s %s %hu", scon, tcon, &tclass) != 3) |
Eric Paris | b77a493 | 2010-11-23 11:40:08 -0500 | [diff] [blame^] | 953 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 954 | |
wzt.wzt@gmail.com | c1a7368 | 2010-04-09 19:30:29 +0800 | [diff] [blame] | 955 | length = security_context_to_sid(scon, strlen(scon) + 1, &ssid); |
Eric Paris | b77a493 | 2010-11-23 11:40:08 -0500 | [diff] [blame^] | 956 | if (length) |
| 957 | goto out; |
| 958 | |
wzt.wzt@gmail.com | c1a7368 | 2010-04-09 19:30:29 +0800 | [diff] [blame] | 959 | length = security_context_to_sid(tcon, strlen(tcon) + 1, &tsid); |
Eric Paris | b77a493 | 2010-11-23 11:40:08 -0500 | [diff] [blame^] | 960 | if (length) |
| 961 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 962 | |
| 963 | length = security_member_sid(ssid, tsid, tclass, &newsid); |
Eric Paris | b77a493 | 2010-11-23 11:40:08 -0500 | [diff] [blame^] | 964 | if (length) |
| 965 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 966 | |
| 967 | length = security_sid_to_context(newsid, &newcon, &len); |
Eric Paris | b77a493 | 2010-11-23 11:40:08 -0500 | [diff] [blame^] | 968 | if (length) |
| 969 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 970 | |
Eric Paris | b77a493 | 2010-11-23 11:40:08 -0500 | [diff] [blame^] | 971 | length = -ERANGE; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 972 | if (len > SIMPLE_TRANSACTION_LIMIT) { |
Eric Paris | 744ba35 | 2008-04-17 11:52:44 -0400 | [diff] [blame] | 973 | printk(KERN_ERR "SELinux: %s: context size (%u) exceeds " |
| 974 | "payload max\n", __func__, len); |
Eric Paris | b77a493 | 2010-11-23 11:40:08 -0500 | [diff] [blame^] | 975 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 976 | } |
| 977 | |
| 978 | memcpy(buf, newcon, len); |
| 979 | length = len; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 980 | out: |
Eric Paris | b77a493 | 2010-11-23 11:40:08 -0500 | [diff] [blame^] | 981 | kfree(newcon); |
| 982 | kfree(tcon); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 983 | kfree(scon); |
| 984 | return length; |
| 985 | } |
| 986 | |
| 987 | static struct inode *sel_make_inode(struct super_block *sb, int mode) |
| 988 | { |
| 989 | struct inode *ret = new_inode(sb); |
| 990 | |
| 991 | if (ret) { |
Christoph Hellwig | 85fe402 | 2010-10-23 11:19:54 -0400 | [diff] [blame] | 992 | ret->i_ino = get_next_ino(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 993 | ret->i_mode = mode; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 994 | ret->i_atime = ret->i_mtime = ret->i_ctime = CURRENT_TIME; |
| 995 | } |
| 996 | return ret; |
| 997 | } |
| 998 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 999 | static ssize_t sel_read_bool(struct file *filep, char __user *buf, |
| 1000 | size_t count, loff_t *ppos) |
| 1001 | { |
| 1002 | char *page = NULL; |
| 1003 | ssize_t length; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1004 | ssize_t ret; |
| 1005 | int cur_enforcing; |
Stephen Smalley | d313f94 | 2007-11-26 11:12:53 -0500 | [diff] [blame] | 1006 | struct inode *inode = filep->f_path.dentry->d_inode; |
| 1007 | unsigned index = inode->i_ino & SEL_INO_MASK; |
| 1008 | const char *name = filep->f_path.dentry->d_name.name; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1009 | |
Ingo Molnar | bb00307 | 2006-03-22 00:09:14 -0800 | [diff] [blame] | 1010 | mutex_lock(&sel_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1011 | |
Eric Paris | b77a493 | 2010-11-23 11:40:08 -0500 | [diff] [blame^] | 1012 | ret = -EINVAL; |
| 1013 | if (index >= bool_num || strcmp(name, bool_pending_names[index])) |
Stephen Smalley | d313f94 | 2007-11-26 11:12:53 -0500 | [diff] [blame] | 1014 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1015 | |
Eric Paris | b77a493 | 2010-11-23 11:40:08 -0500 | [diff] [blame^] | 1016 | ret = -ENOMEM; |
Eric Paris | 1872981 | 2008-04-17 14:15:45 -0400 | [diff] [blame] | 1017 | page = (char *)get_zeroed_page(GFP_KERNEL); |
Eric Paris | b77a493 | 2010-11-23 11:40:08 -0500 | [diff] [blame^] | 1018 | if (!page) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1019 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1020 | |
Stephen Smalley | d313f94 | 2007-11-26 11:12:53 -0500 | [diff] [blame] | 1021 | cur_enforcing = security_get_bool_value(index); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1022 | if (cur_enforcing < 0) { |
| 1023 | ret = cur_enforcing; |
| 1024 | goto out; |
| 1025 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1026 | length = scnprintf(page, PAGE_SIZE, "%d %d", cur_enforcing, |
Stephen Smalley | d313f94 | 2007-11-26 11:12:53 -0500 | [diff] [blame] | 1027 | bool_pending_values[index]); |
Stephen Smalley | 68bdcf2 | 2006-03-22 00:09:15 -0800 | [diff] [blame] | 1028 | ret = simple_read_from_buffer(buf, count, ppos, page, length); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1029 | out: |
Ingo Molnar | bb00307 | 2006-03-22 00:09:14 -0800 | [diff] [blame] | 1030 | mutex_unlock(&sel_mutex); |
Eric Paris | b77a493 | 2010-11-23 11:40:08 -0500 | [diff] [blame^] | 1031 | free_page((unsigned long)page); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1032 | return ret; |
| 1033 | } |
| 1034 | |
| 1035 | static ssize_t sel_write_bool(struct file *filep, const char __user *buf, |
| 1036 | size_t count, loff_t *ppos) |
| 1037 | { |
| 1038 | char *page = NULL; |
Stephen Smalley | d313f94 | 2007-11-26 11:12:53 -0500 | [diff] [blame] | 1039 | ssize_t length; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1040 | int new_value; |
Stephen Smalley | d313f94 | 2007-11-26 11:12:53 -0500 | [diff] [blame] | 1041 | struct inode *inode = filep->f_path.dentry->d_inode; |
| 1042 | unsigned index = inode->i_ino & SEL_INO_MASK; |
| 1043 | const char *name = filep->f_path.dentry->d_name.name; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1044 | |
Ingo Molnar | bb00307 | 2006-03-22 00:09:14 -0800 | [diff] [blame] | 1045 | mutex_lock(&sel_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1046 | |
| 1047 | length = task_has_security(current, SECURITY__SETBOOL); |
| 1048 | if (length) |
| 1049 | goto out; |
| 1050 | |
Eric Paris | b77a493 | 2010-11-23 11:40:08 -0500 | [diff] [blame^] | 1051 | length = -EINVAL; |
| 1052 | if (index >= bool_num || strcmp(name, bool_pending_names[index])) |
Stephen Smalley | d313f94 | 2007-11-26 11:12:53 -0500 | [diff] [blame] | 1053 | goto out; |
Stephen Smalley | d313f94 | 2007-11-26 11:12:53 -0500 | [diff] [blame] | 1054 | |
Eric Paris | b77a493 | 2010-11-23 11:40:08 -0500 | [diff] [blame^] | 1055 | length = -ENOMEM; |
| 1056 | if (count >= PAGE_SIZE) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1057 | goto out; |
Stephen Smalley | d313f94 | 2007-11-26 11:12:53 -0500 | [diff] [blame] | 1058 | |
Eric Paris | b77a493 | 2010-11-23 11:40:08 -0500 | [diff] [blame^] | 1059 | /* No partial writes. */ |
| 1060 | length = -EINVAL; |
| 1061 | if (*ppos != 0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1062 | goto out; |
Eric Paris | b77a493 | 2010-11-23 11:40:08 -0500 | [diff] [blame^] | 1063 | |
| 1064 | length = -ENOMEM; |
Eric Paris | 1872981 | 2008-04-17 14:15:45 -0400 | [diff] [blame] | 1065 | page = (char *)get_zeroed_page(GFP_KERNEL); |
Eric Paris | b77a493 | 2010-11-23 11:40:08 -0500 | [diff] [blame^] | 1066 | if (!page) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1067 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1068 | |
Stephen Smalley | d313f94 | 2007-11-26 11:12:53 -0500 | [diff] [blame] | 1069 | length = -EFAULT; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1070 | if (copy_from_user(page, buf, count)) |
| 1071 | goto out; |
| 1072 | |
| 1073 | length = -EINVAL; |
| 1074 | if (sscanf(page, "%d", &new_value) != 1) |
| 1075 | goto out; |
| 1076 | |
| 1077 | if (new_value) |
| 1078 | new_value = 1; |
| 1079 | |
Stephen Smalley | d313f94 | 2007-11-26 11:12:53 -0500 | [diff] [blame] | 1080 | bool_pending_values[index] = new_value; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1081 | length = count; |
| 1082 | |
| 1083 | out: |
Ingo Molnar | bb00307 | 2006-03-22 00:09:14 -0800 | [diff] [blame] | 1084 | mutex_unlock(&sel_mutex); |
Eric Paris | b77a493 | 2010-11-23 11:40:08 -0500 | [diff] [blame^] | 1085 | free_page((unsigned long) page); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1086 | return length; |
| 1087 | } |
| 1088 | |
Arjan van de Ven | 9c2e08c | 2007-02-12 00:55:37 -0800 | [diff] [blame] | 1089 | static const struct file_operations sel_bool_ops = { |
Eric Paris | 1872981 | 2008-04-17 14:15:45 -0400 | [diff] [blame] | 1090 | .read = sel_read_bool, |
| 1091 | .write = sel_write_bool, |
Arnd Bergmann | 57a62c2 | 2010-07-07 23:40:10 +0200 | [diff] [blame] | 1092 | .llseek = generic_file_llseek, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1093 | }; |
| 1094 | |
| 1095 | static ssize_t sel_commit_bools_write(struct file *filep, |
| 1096 | const char __user *buf, |
| 1097 | size_t count, loff_t *ppos) |
| 1098 | { |
| 1099 | char *page = NULL; |
Stephen Smalley | d313f94 | 2007-11-26 11:12:53 -0500 | [diff] [blame] | 1100 | ssize_t length; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1101 | int new_value; |
| 1102 | |
Ingo Molnar | bb00307 | 2006-03-22 00:09:14 -0800 | [diff] [blame] | 1103 | mutex_lock(&sel_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1104 | |
| 1105 | length = task_has_security(current, SECURITY__SETBOOL); |
| 1106 | if (length) |
| 1107 | goto out; |
| 1108 | |
Eric Paris | b77a493 | 2010-11-23 11:40:08 -0500 | [diff] [blame^] | 1109 | length = -ENOMEM; |
| 1110 | if (count >= PAGE_SIZE) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1111 | goto out; |
Eric Paris | b77a493 | 2010-11-23 11:40:08 -0500 | [diff] [blame^] | 1112 | |
| 1113 | /* No partial writes. */ |
| 1114 | length = -EINVAL; |
| 1115 | if (*ppos != 0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1116 | goto out; |
Eric Paris | b77a493 | 2010-11-23 11:40:08 -0500 | [diff] [blame^] | 1117 | |
| 1118 | length = -ENOMEM; |
Eric Paris | 1872981 | 2008-04-17 14:15:45 -0400 | [diff] [blame] | 1119 | page = (char *)get_zeroed_page(GFP_KERNEL); |
Eric Paris | b77a493 | 2010-11-23 11:40:08 -0500 | [diff] [blame^] | 1120 | if (!page) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1121 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1122 | |
Stephen Smalley | d313f94 | 2007-11-26 11:12:53 -0500 | [diff] [blame] | 1123 | length = -EFAULT; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1124 | if (copy_from_user(page, buf, count)) |
| 1125 | goto out; |
| 1126 | |
| 1127 | length = -EINVAL; |
| 1128 | if (sscanf(page, "%d", &new_value) != 1) |
| 1129 | goto out; |
| 1130 | |
Eric Paris | b77a493 | 2010-11-23 11:40:08 -0500 | [diff] [blame^] | 1131 | length = 0; |
Eric Paris | 1872981 | 2008-04-17 14:15:45 -0400 | [diff] [blame] | 1132 | if (new_value && bool_pending_values) |
Eric Paris | b77a493 | 2010-11-23 11:40:08 -0500 | [diff] [blame^] | 1133 | length = security_set_bools(bool_num, bool_pending_values); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1134 | |
Eric Paris | b77a493 | 2010-11-23 11:40:08 -0500 | [diff] [blame^] | 1135 | if (!length) |
| 1136 | length = count; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1137 | |
| 1138 | out: |
Ingo Molnar | bb00307 | 2006-03-22 00:09:14 -0800 | [diff] [blame] | 1139 | mutex_unlock(&sel_mutex); |
Eric Paris | b77a493 | 2010-11-23 11:40:08 -0500 | [diff] [blame^] | 1140 | free_page((unsigned long) page); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1141 | return length; |
| 1142 | } |
| 1143 | |
Arjan van de Ven | 9c2e08c | 2007-02-12 00:55:37 -0800 | [diff] [blame] | 1144 | static const struct file_operations sel_commit_bools_ops = { |
Eric Paris | 1872981 | 2008-04-17 14:15:45 -0400 | [diff] [blame] | 1145 | .write = sel_commit_bools_write, |
Arnd Bergmann | 57a62c2 | 2010-07-07 23:40:10 +0200 | [diff] [blame] | 1146 | .llseek = generic_file_llseek, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1147 | }; |
| 1148 | |
Christopher J. PeBenito | 0c92d7c | 2007-05-23 09:12:07 -0400 | [diff] [blame] | 1149 | static void sel_remove_entries(struct dentry *de) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1150 | { |
Stephen Smalley | 0955dc0 | 2007-11-21 09:01:36 -0500 | [diff] [blame] | 1151 | struct list_head *node; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1152 | |
| 1153 | spin_lock(&dcache_lock); |
| 1154 | node = de->d_subdirs.next; |
| 1155 | while (node != &de->d_subdirs) { |
Eric Dumazet | 5160ee6 | 2006-01-08 01:03:32 -0800 | [diff] [blame] | 1156 | struct dentry *d = list_entry(node, struct dentry, d_u.d_child); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1157 | list_del_init(node); |
| 1158 | |
| 1159 | if (d->d_inode) { |
| 1160 | d = dget_locked(d); |
| 1161 | spin_unlock(&dcache_lock); |
| 1162 | d_delete(d); |
| 1163 | simple_unlink(de->d_inode, d); |
| 1164 | dput(d); |
| 1165 | spin_lock(&dcache_lock); |
| 1166 | } |
| 1167 | node = de->d_subdirs.next; |
| 1168 | } |
| 1169 | |
| 1170 | spin_unlock(&dcache_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1171 | } |
| 1172 | |
| 1173 | #define BOOL_DIR_NAME "booleans" |
| 1174 | |
| 1175 | static int sel_make_bools(void) |
| 1176 | { |
Eric Paris | b77a493 | 2010-11-23 11:40:08 -0500 | [diff] [blame^] | 1177 | int i, ret; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1178 | ssize_t len; |
| 1179 | struct dentry *dentry = NULL; |
| 1180 | struct dentry *dir = bool_dir; |
| 1181 | struct inode *inode = NULL; |
| 1182 | struct inode_security_struct *isec; |
| 1183 | char **names = NULL, *page; |
| 1184 | int num; |
| 1185 | int *values = NULL; |
| 1186 | u32 sid; |
| 1187 | |
| 1188 | /* remove any existing files */ |
Xiaotian Feng | 8007f10 | 2010-02-09 08:22:24 +1100 | [diff] [blame] | 1189 | for (i = 0; i < bool_num; i++) |
| 1190 | kfree(bool_pending_names[i]); |
Stephen Smalley | d313f94 | 2007-11-26 11:12:53 -0500 | [diff] [blame] | 1191 | kfree(bool_pending_names); |
Jesper Juhl | 9a5f04b | 2005-06-25 14:58:51 -0700 | [diff] [blame] | 1192 | kfree(bool_pending_values); |
Stephen Smalley | d313f94 | 2007-11-26 11:12:53 -0500 | [diff] [blame] | 1193 | bool_pending_names = NULL; |
Davi Arnaut | 20c19e4 | 2005-10-23 12:57:16 -0700 | [diff] [blame] | 1194 | bool_pending_values = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1195 | |
Christopher J. PeBenito | 0c92d7c | 2007-05-23 09:12:07 -0400 | [diff] [blame] | 1196 | sel_remove_entries(dir); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1197 | |
Eric Paris | b77a493 | 2010-11-23 11:40:08 -0500 | [diff] [blame^] | 1198 | ret = -ENOMEM; |
Eric Paris | 1872981 | 2008-04-17 14:15:45 -0400 | [diff] [blame] | 1199 | page = (char *)get_zeroed_page(GFP_KERNEL); |
| 1200 | if (!page) |
Eric Paris | b77a493 | 2010-11-23 11:40:08 -0500 | [diff] [blame^] | 1201 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1202 | |
| 1203 | ret = security_get_bools(&num, &names, &values); |
Eric Paris | b77a493 | 2010-11-23 11:40:08 -0500 | [diff] [blame^] | 1204 | if (ret) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1205 | goto out; |
| 1206 | |
| 1207 | for (i = 0; i < num; i++) { |
Eric Paris | b77a493 | 2010-11-23 11:40:08 -0500 | [diff] [blame^] | 1208 | ret = -ENOMEM; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1209 | dentry = d_alloc_name(dir, names[i]); |
Eric Paris | b77a493 | 2010-11-23 11:40:08 -0500 | [diff] [blame^] | 1210 | if (!dentry) |
| 1211 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1212 | |
Eric Paris | b77a493 | 2010-11-23 11:40:08 -0500 | [diff] [blame^] | 1213 | ret = -ENOMEM; |
| 1214 | inode = sel_make_inode(dir->d_sb, S_IFREG | S_IRUGO | S_IWUSR); |
| 1215 | if (!inode) |
| 1216 | goto out; |
| 1217 | |
| 1218 | ret = -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1219 | len = snprintf(page, PAGE_SIZE, "/%s/%s", BOOL_DIR_NAME, names[i]); |
Eric Paris | b77a493 | 2010-11-23 11:40:08 -0500 | [diff] [blame^] | 1220 | if (len < 0) |
| 1221 | goto out; |
| 1222 | |
| 1223 | ret = -ENAMETOOLONG; |
| 1224 | if (len >= PAGE_SIZE) |
| 1225 | goto out; |
| 1226 | |
Eric Paris | 1872981 | 2008-04-17 14:15:45 -0400 | [diff] [blame] | 1227 | isec = (struct inode_security_struct *)inode->i_security; |
| 1228 | ret = security_genfs_sid("selinuxfs", page, SECCLASS_FILE, &sid); |
| 1229 | if (ret) |
Eric Paris | b77a493 | 2010-11-23 11:40:08 -0500 | [diff] [blame^] | 1230 | goto out; |
| 1231 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1232 | isec->sid = sid; |
| 1233 | isec->initialized = 1; |
| 1234 | inode->i_fop = &sel_bool_ops; |
James Carter | bce34bc | 2007-04-04 16:18:50 -0400 | [diff] [blame] | 1235 | inode->i_ino = i|SEL_BOOL_INO_OFFSET; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1236 | d_add(dentry, inode); |
| 1237 | } |
| 1238 | bool_num = num; |
Stephen Smalley | d313f94 | 2007-11-26 11:12:53 -0500 | [diff] [blame] | 1239 | bool_pending_names = names; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1240 | bool_pending_values = values; |
Eric Paris | b77a493 | 2010-11-23 11:40:08 -0500 | [diff] [blame^] | 1241 | |
| 1242 | free_page((unsigned long)page); |
| 1243 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1244 | out: |
| 1245 | free_page((unsigned long)page); |
Eric Paris | b77a493 | 2010-11-23 11:40:08 -0500 | [diff] [blame^] | 1246 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1247 | if (names) { |
Jesper Juhl | 9a5f04b | 2005-06-25 14:58:51 -0700 | [diff] [blame] | 1248 | for (i = 0; i < num; i++) |
| 1249 | kfree(names[i]); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1250 | kfree(names); |
| 1251 | } |
Davi Arnaut | 20c19e4 | 2005-10-23 12:57:16 -0700 | [diff] [blame] | 1252 | kfree(values); |
Christopher J. PeBenito | 0c92d7c | 2007-05-23 09:12:07 -0400 | [diff] [blame] | 1253 | sel_remove_entries(dir); |
Eric Paris | b77a493 | 2010-11-23 11:40:08 -0500 | [diff] [blame^] | 1254 | |
| 1255 | return ret; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1256 | } |
| 1257 | |
| 1258 | #define NULL_FILE_NAME "null" |
| 1259 | |
Eric Paris | 1872981 | 2008-04-17 14:15:45 -0400 | [diff] [blame] | 1260 | struct dentry *selinux_null; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1261 | |
| 1262 | static ssize_t sel_read_avc_cache_threshold(struct file *filp, char __user *buf, |
| 1263 | size_t count, loff_t *ppos) |
| 1264 | { |
| 1265 | char tmpbuf[TMPBUFLEN]; |
| 1266 | ssize_t length; |
| 1267 | |
| 1268 | length = scnprintf(tmpbuf, TMPBUFLEN, "%u", avc_cache_threshold); |
| 1269 | return simple_read_from_buffer(buf, count, ppos, tmpbuf, length); |
| 1270 | } |
| 1271 | |
Eric Paris | 1872981 | 2008-04-17 14:15:45 -0400 | [diff] [blame] | 1272 | static ssize_t sel_write_avc_cache_threshold(struct file *file, |
| 1273 | const char __user *buf, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1274 | size_t count, loff_t *ppos) |
| 1275 | |
| 1276 | { |
Eric Paris | b77a493 | 2010-11-23 11:40:08 -0500 | [diff] [blame^] | 1277 | char *page = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1278 | ssize_t ret; |
| 1279 | int new_value; |
| 1280 | |
Eric Paris | b77a493 | 2010-11-23 11:40:08 -0500 | [diff] [blame^] | 1281 | ret = task_has_security(current, SECURITY__SETSECPARAM); |
| 1282 | if (ret) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1283 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1284 | |
Eric Paris | b77a493 | 2010-11-23 11:40:08 -0500 | [diff] [blame^] | 1285 | ret = -ENOMEM; |
| 1286 | if (count >= PAGE_SIZE) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1287 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1288 | |
Eric Paris | b77a493 | 2010-11-23 11:40:08 -0500 | [diff] [blame^] | 1289 | /* No partial writes. */ |
| 1290 | ret = -EINVAL; |
| 1291 | if (*ppos != 0) |
| 1292 | goto out; |
| 1293 | |
| 1294 | ret = -ENOMEM; |
Eric Paris | 1872981 | 2008-04-17 14:15:45 -0400 | [diff] [blame] | 1295 | page = (char *)get_zeroed_page(GFP_KERNEL); |
Eric Paris | b77a493 | 2010-11-23 11:40:08 -0500 | [diff] [blame^] | 1296 | if (!page) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1297 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1298 | |
Eric Paris | b77a493 | 2010-11-23 11:40:08 -0500 | [diff] [blame^] | 1299 | ret = -EFAULT; |
| 1300 | if (copy_from_user(page, buf, count)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1301 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1302 | |
Eric Paris | b77a493 | 2010-11-23 11:40:08 -0500 | [diff] [blame^] | 1303 | ret = -EINVAL; |
| 1304 | if (sscanf(page, "%u", &new_value) != 1) |
| 1305 | goto out; |
| 1306 | |
| 1307 | avc_cache_threshold = new_value; |
| 1308 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1309 | ret = count; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1310 | out: |
Eric Paris | b77a493 | 2010-11-23 11:40:08 -0500 | [diff] [blame^] | 1311 | free_page((unsigned long)page); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1312 | return ret; |
| 1313 | } |
| 1314 | |
| 1315 | static ssize_t sel_read_avc_hash_stats(struct file *filp, char __user *buf, |
| 1316 | size_t count, loff_t *ppos) |
| 1317 | { |
| 1318 | char *page; |
Eric Paris | b77a493 | 2010-11-23 11:40:08 -0500 | [diff] [blame^] | 1319 | ssize_t length; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1320 | |
| 1321 | page = (char *)__get_free_page(GFP_KERNEL); |
Eric Paris | b77a493 | 2010-11-23 11:40:08 -0500 | [diff] [blame^] | 1322 | if (!page) |
| 1323 | return -ENOMEM; |
| 1324 | |
| 1325 | length = avc_get_hash_stats(page); |
| 1326 | if (length >= 0) |
| 1327 | length = simple_read_from_buffer(buf, count, ppos, page, length); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1328 | free_page((unsigned long)page); |
Eric Paris | b77a493 | 2010-11-23 11:40:08 -0500 | [diff] [blame^] | 1329 | |
| 1330 | return length; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1331 | } |
| 1332 | |
Arjan van de Ven | 9c2e08c | 2007-02-12 00:55:37 -0800 | [diff] [blame] | 1333 | static const struct file_operations sel_avc_cache_threshold_ops = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1334 | .read = sel_read_avc_cache_threshold, |
| 1335 | .write = sel_write_avc_cache_threshold, |
Arnd Bergmann | 57a62c2 | 2010-07-07 23:40:10 +0200 | [diff] [blame] | 1336 | .llseek = generic_file_llseek, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1337 | }; |
| 1338 | |
Arjan van de Ven | 9c2e08c | 2007-02-12 00:55:37 -0800 | [diff] [blame] | 1339 | static const struct file_operations sel_avc_hash_stats_ops = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1340 | .read = sel_read_avc_hash_stats, |
Arnd Bergmann | 57a62c2 | 2010-07-07 23:40:10 +0200 | [diff] [blame] | 1341 | .llseek = generic_file_llseek, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1342 | }; |
| 1343 | |
| 1344 | #ifdef CONFIG_SECURITY_SELINUX_AVC_STATS |
| 1345 | static struct avc_cache_stats *sel_avc_get_stat_idx(loff_t *idx) |
| 1346 | { |
| 1347 | int cpu; |
| 1348 | |
Rusty Russell | 4f4b6c1 | 2009-01-01 10:12:15 +1030 | [diff] [blame] | 1349 | for (cpu = *idx; cpu < nr_cpu_ids; ++cpu) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1350 | if (!cpu_possible(cpu)) |
| 1351 | continue; |
| 1352 | *idx = cpu + 1; |
| 1353 | return &per_cpu(avc_cache_stats, cpu); |
| 1354 | } |
| 1355 | return NULL; |
| 1356 | } |
| 1357 | |
| 1358 | static void *sel_avc_stats_seq_start(struct seq_file *seq, loff_t *pos) |
| 1359 | { |
| 1360 | loff_t n = *pos - 1; |
| 1361 | |
| 1362 | if (*pos == 0) |
| 1363 | return SEQ_START_TOKEN; |
| 1364 | |
| 1365 | return sel_avc_get_stat_idx(&n); |
| 1366 | } |
| 1367 | |
| 1368 | static void *sel_avc_stats_seq_next(struct seq_file *seq, void *v, loff_t *pos) |
| 1369 | { |
| 1370 | return sel_avc_get_stat_idx(pos); |
| 1371 | } |
| 1372 | |
| 1373 | static int sel_avc_stats_seq_show(struct seq_file *seq, void *v) |
| 1374 | { |
| 1375 | struct avc_cache_stats *st = v; |
| 1376 | |
| 1377 | if (v == SEQ_START_TOKEN) |
| 1378 | seq_printf(seq, "lookups hits misses allocations reclaims " |
| 1379 | "frees\n"); |
| 1380 | else |
| 1381 | seq_printf(seq, "%u %u %u %u %u %u\n", st->lookups, |
| 1382 | st->hits, st->misses, st->allocations, |
| 1383 | st->reclaims, st->frees); |
| 1384 | return 0; |
| 1385 | } |
| 1386 | |
| 1387 | static void sel_avc_stats_seq_stop(struct seq_file *seq, void *v) |
| 1388 | { } |
| 1389 | |
Jan Engelhardt | 1996a10 | 2008-01-23 00:02:58 +0100 | [diff] [blame] | 1390 | static const struct seq_operations sel_avc_cache_stats_seq_ops = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1391 | .start = sel_avc_stats_seq_start, |
| 1392 | .next = sel_avc_stats_seq_next, |
| 1393 | .show = sel_avc_stats_seq_show, |
| 1394 | .stop = sel_avc_stats_seq_stop, |
| 1395 | }; |
| 1396 | |
| 1397 | static int sel_open_avc_cache_stats(struct inode *inode, struct file *file) |
| 1398 | { |
| 1399 | return seq_open(file, &sel_avc_cache_stats_seq_ops); |
| 1400 | } |
| 1401 | |
Arjan van de Ven | 9c2e08c | 2007-02-12 00:55:37 -0800 | [diff] [blame] | 1402 | static const struct file_operations sel_avc_cache_stats_ops = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1403 | .open = sel_open_avc_cache_stats, |
| 1404 | .read = seq_read, |
| 1405 | .llseek = seq_lseek, |
| 1406 | .release = seq_release, |
| 1407 | }; |
| 1408 | #endif |
| 1409 | |
| 1410 | static int sel_make_avc_files(struct dentry *dir) |
| 1411 | { |
Eric Paris | b77a493 | 2010-11-23 11:40:08 -0500 | [diff] [blame^] | 1412 | int i; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1413 | static struct tree_descr files[] = { |
| 1414 | { "cache_threshold", |
| 1415 | &sel_avc_cache_threshold_ops, S_IRUGO|S_IWUSR }, |
| 1416 | { "hash_stats", &sel_avc_hash_stats_ops, S_IRUGO }, |
| 1417 | #ifdef CONFIG_SECURITY_SELINUX_AVC_STATS |
| 1418 | { "cache_stats", &sel_avc_cache_stats_ops, S_IRUGO }, |
| 1419 | #endif |
| 1420 | }; |
| 1421 | |
Nicolas Kaiser | 6e20a64 | 2006-01-06 00:11:22 -0800 | [diff] [blame] | 1422 | for (i = 0; i < ARRAY_SIZE(files); i++) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1423 | struct inode *inode; |
| 1424 | struct dentry *dentry; |
| 1425 | |
| 1426 | dentry = d_alloc_name(dir, files[i].name); |
Eric Paris | b77a493 | 2010-11-23 11:40:08 -0500 | [diff] [blame^] | 1427 | if (!dentry) |
| 1428 | return -ENOMEM; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1429 | |
| 1430 | inode = sel_make_inode(dir->d_sb, S_IFREG|files[i].mode); |
Eric Paris | b77a493 | 2010-11-23 11:40:08 -0500 | [diff] [blame^] | 1431 | if (!inode) |
| 1432 | return -ENOMEM; |
| 1433 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1434 | inode->i_fop = files[i].ops; |
James Carter | 6174eaf | 2007-04-04 16:18:39 -0400 | [diff] [blame] | 1435 | inode->i_ino = ++sel_last_ino; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1436 | d_add(dentry, inode); |
| 1437 | } |
Eric Paris | b77a493 | 2010-11-23 11:40:08 -0500 | [diff] [blame^] | 1438 | |
| 1439 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1440 | } |
| 1441 | |
Eric Paris | 1872981 | 2008-04-17 14:15:45 -0400 | [diff] [blame] | 1442 | static ssize_t sel_read_initcon(struct file *file, char __user *buf, |
James Carter | f0ee2e4 | 2007-04-04 10:11:29 -0400 | [diff] [blame] | 1443 | size_t count, loff_t *ppos) |
| 1444 | { |
| 1445 | struct inode *inode; |
| 1446 | char *con; |
| 1447 | u32 sid, len; |
| 1448 | ssize_t ret; |
| 1449 | |
| 1450 | inode = file->f_path.dentry->d_inode; |
| 1451 | sid = inode->i_ino&SEL_INO_MASK; |
| 1452 | ret = security_sid_to_context(sid, &con, &len); |
Eric Paris | b77a493 | 2010-11-23 11:40:08 -0500 | [diff] [blame^] | 1453 | if (ret) |
James Carter | f0ee2e4 | 2007-04-04 10:11:29 -0400 | [diff] [blame] | 1454 | return ret; |
| 1455 | |
| 1456 | ret = simple_read_from_buffer(buf, count, ppos, con, len); |
| 1457 | kfree(con); |
| 1458 | return ret; |
| 1459 | } |
| 1460 | |
| 1461 | static const struct file_operations sel_initcon_ops = { |
| 1462 | .read = sel_read_initcon, |
Arnd Bergmann | 57a62c2 | 2010-07-07 23:40:10 +0200 | [diff] [blame] | 1463 | .llseek = generic_file_llseek, |
James Carter | f0ee2e4 | 2007-04-04 10:11:29 -0400 | [diff] [blame] | 1464 | }; |
| 1465 | |
| 1466 | static int sel_make_initcon_files(struct dentry *dir) |
| 1467 | { |
Eric Paris | b77a493 | 2010-11-23 11:40:08 -0500 | [diff] [blame^] | 1468 | int i; |
James Carter | f0ee2e4 | 2007-04-04 10:11:29 -0400 | [diff] [blame] | 1469 | |
| 1470 | for (i = 1; i <= SECINITSID_NUM; i++) { |
| 1471 | struct inode *inode; |
| 1472 | struct dentry *dentry; |
| 1473 | dentry = d_alloc_name(dir, security_get_initial_sid_context(i)); |
Eric Paris | b77a493 | 2010-11-23 11:40:08 -0500 | [diff] [blame^] | 1474 | if (!dentry) |
| 1475 | return -ENOMEM; |
James Carter | f0ee2e4 | 2007-04-04 10:11:29 -0400 | [diff] [blame] | 1476 | |
| 1477 | inode = sel_make_inode(dir->d_sb, S_IFREG|S_IRUGO); |
Eric Paris | b77a493 | 2010-11-23 11:40:08 -0500 | [diff] [blame^] | 1478 | if (!inode) |
| 1479 | return -ENOMEM; |
| 1480 | |
James Carter | f0ee2e4 | 2007-04-04 10:11:29 -0400 | [diff] [blame] | 1481 | inode->i_fop = &sel_initcon_ops; |
| 1482 | inode->i_ino = i|SEL_INITCON_INO_OFFSET; |
| 1483 | d_add(dentry, inode); |
| 1484 | } |
Eric Paris | b77a493 | 2010-11-23 11:40:08 -0500 | [diff] [blame^] | 1485 | |
| 1486 | return 0; |
James Carter | f0ee2e4 | 2007-04-04 10:11:29 -0400 | [diff] [blame] | 1487 | } |
| 1488 | |
Christopher J. PeBenito | e47c8fc | 2007-05-23 09:12:09 -0400 | [diff] [blame] | 1489 | static inline unsigned int sel_div(unsigned long a, unsigned long b) |
| 1490 | { |
| 1491 | return a / b - (a % b < 0); |
| 1492 | } |
| 1493 | |
| 1494 | static inline unsigned long sel_class_to_ino(u16 class) |
| 1495 | { |
| 1496 | return (class * (SEL_VEC_MAX + 1)) | SEL_CLASS_INO_OFFSET; |
| 1497 | } |
| 1498 | |
| 1499 | static inline u16 sel_ino_to_class(unsigned long ino) |
| 1500 | { |
| 1501 | return sel_div(ino & SEL_INO_MASK, SEL_VEC_MAX + 1); |
| 1502 | } |
| 1503 | |
| 1504 | static inline unsigned long sel_perm_to_ino(u16 class, u32 perm) |
| 1505 | { |
| 1506 | return (class * (SEL_VEC_MAX + 1) + perm) | SEL_CLASS_INO_OFFSET; |
| 1507 | } |
| 1508 | |
| 1509 | static inline u32 sel_ino_to_perm(unsigned long ino) |
| 1510 | { |
| 1511 | return (ino & SEL_INO_MASK) % (SEL_VEC_MAX + 1); |
| 1512 | } |
| 1513 | |
Eric Paris | 1872981 | 2008-04-17 14:15:45 -0400 | [diff] [blame] | 1514 | static ssize_t sel_read_class(struct file *file, char __user *buf, |
Christopher J. PeBenito | e47c8fc | 2007-05-23 09:12:09 -0400 | [diff] [blame] | 1515 | size_t count, loff_t *ppos) |
| 1516 | { |
| 1517 | ssize_t rc, len; |
| 1518 | char *page; |
| 1519 | unsigned long ino = file->f_path.dentry->d_inode->i_ino; |
| 1520 | |
| 1521 | page = (char *)__get_free_page(GFP_KERNEL); |
Eric Paris | b77a493 | 2010-11-23 11:40:08 -0500 | [diff] [blame^] | 1522 | if (!page) |
| 1523 | return -ENOMEM; |
Christopher J. PeBenito | e47c8fc | 2007-05-23 09:12:09 -0400 | [diff] [blame] | 1524 | |
| 1525 | len = snprintf(page, PAGE_SIZE, "%d", sel_ino_to_class(ino)); |
| 1526 | rc = simple_read_from_buffer(buf, count, ppos, page, len); |
| 1527 | free_page((unsigned long)page); |
Eric Paris | b77a493 | 2010-11-23 11:40:08 -0500 | [diff] [blame^] | 1528 | |
Christopher J. PeBenito | e47c8fc | 2007-05-23 09:12:09 -0400 | [diff] [blame] | 1529 | return rc; |
| 1530 | } |
| 1531 | |
| 1532 | static const struct file_operations sel_class_ops = { |
| 1533 | .read = sel_read_class, |
Arnd Bergmann | 57a62c2 | 2010-07-07 23:40:10 +0200 | [diff] [blame] | 1534 | .llseek = generic_file_llseek, |
Christopher J. PeBenito | e47c8fc | 2007-05-23 09:12:09 -0400 | [diff] [blame] | 1535 | }; |
| 1536 | |
Eric Paris | 1872981 | 2008-04-17 14:15:45 -0400 | [diff] [blame] | 1537 | static ssize_t sel_read_perm(struct file *file, char __user *buf, |
Christopher J. PeBenito | e47c8fc | 2007-05-23 09:12:09 -0400 | [diff] [blame] | 1538 | size_t count, loff_t *ppos) |
| 1539 | { |
| 1540 | ssize_t rc, len; |
| 1541 | char *page; |
| 1542 | unsigned long ino = file->f_path.dentry->d_inode->i_ino; |
| 1543 | |
| 1544 | page = (char *)__get_free_page(GFP_KERNEL); |
Eric Paris | b77a493 | 2010-11-23 11:40:08 -0500 | [diff] [blame^] | 1545 | if (!page) |
| 1546 | return -ENOMEM; |
Christopher J. PeBenito | e47c8fc | 2007-05-23 09:12:09 -0400 | [diff] [blame] | 1547 | |
Eric Paris | 1872981 | 2008-04-17 14:15:45 -0400 | [diff] [blame] | 1548 | len = snprintf(page, PAGE_SIZE, "%d", sel_ino_to_perm(ino)); |
Christopher J. PeBenito | e47c8fc | 2007-05-23 09:12:09 -0400 | [diff] [blame] | 1549 | rc = simple_read_from_buffer(buf, count, ppos, page, len); |
| 1550 | free_page((unsigned long)page); |
Eric Paris | b77a493 | 2010-11-23 11:40:08 -0500 | [diff] [blame^] | 1551 | |
Christopher J. PeBenito | e47c8fc | 2007-05-23 09:12:09 -0400 | [diff] [blame] | 1552 | return rc; |
| 1553 | } |
| 1554 | |
| 1555 | static const struct file_operations sel_perm_ops = { |
| 1556 | .read = sel_read_perm, |
Arnd Bergmann | 57a62c2 | 2010-07-07 23:40:10 +0200 | [diff] [blame] | 1557 | .llseek = generic_file_llseek, |
Christopher J. PeBenito | e47c8fc | 2007-05-23 09:12:09 -0400 | [diff] [blame] | 1558 | }; |
| 1559 | |
Paul Moore | 3bb56b2 | 2008-01-29 08:38:19 -0500 | [diff] [blame] | 1560 | static ssize_t sel_read_policycap(struct file *file, char __user *buf, |
| 1561 | size_t count, loff_t *ppos) |
| 1562 | { |
| 1563 | int value; |
| 1564 | char tmpbuf[TMPBUFLEN]; |
| 1565 | ssize_t length; |
| 1566 | unsigned long i_ino = file->f_path.dentry->d_inode->i_ino; |
| 1567 | |
| 1568 | value = security_policycap_supported(i_ino & SEL_INO_MASK); |
| 1569 | length = scnprintf(tmpbuf, TMPBUFLEN, "%d", value); |
| 1570 | |
| 1571 | return simple_read_from_buffer(buf, count, ppos, tmpbuf, length); |
| 1572 | } |
| 1573 | |
| 1574 | static const struct file_operations sel_policycap_ops = { |
| 1575 | .read = sel_read_policycap, |
Arnd Bergmann | 57a62c2 | 2010-07-07 23:40:10 +0200 | [diff] [blame] | 1576 | .llseek = generic_file_llseek, |
Paul Moore | 3bb56b2 | 2008-01-29 08:38:19 -0500 | [diff] [blame] | 1577 | }; |
| 1578 | |
Christopher J. PeBenito | e47c8fc | 2007-05-23 09:12:09 -0400 | [diff] [blame] | 1579 | static int sel_make_perm_files(char *objclass, int classvalue, |
| 1580 | struct dentry *dir) |
| 1581 | { |
Eric Paris | b77a493 | 2010-11-23 11:40:08 -0500 | [diff] [blame^] | 1582 | int i, rc, nperms; |
Christopher J. PeBenito | e47c8fc | 2007-05-23 09:12:09 -0400 | [diff] [blame] | 1583 | char **perms; |
| 1584 | |
| 1585 | rc = security_get_permissions(objclass, &perms, &nperms); |
| 1586 | if (rc) |
Eric Paris | b77a493 | 2010-11-23 11:40:08 -0500 | [diff] [blame^] | 1587 | return rc; |
Christopher J. PeBenito | e47c8fc | 2007-05-23 09:12:09 -0400 | [diff] [blame] | 1588 | |
| 1589 | for (i = 0; i < nperms; i++) { |
| 1590 | struct inode *inode; |
| 1591 | struct dentry *dentry; |
| 1592 | |
Eric Paris | b77a493 | 2010-11-23 11:40:08 -0500 | [diff] [blame^] | 1593 | rc = -ENOMEM; |
Christopher J. PeBenito | e47c8fc | 2007-05-23 09:12:09 -0400 | [diff] [blame] | 1594 | dentry = d_alloc_name(dir, perms[i]); |
Eric Paris | b77a493 | 2010-11-23 11:40:08 -0500 | [diff] [blame^] | 1595 | if (!dentry) |
| 1596 | goto out; |
Christopher J. PeBenito | e47c8fc | 2007-05-23 09:12:09 -0400 | [diff] [blame] | 1597 | |
Eric Paris | b77a493 | 2010-11-23 11:40:08 -0500 | [diff] [blame^] | 1598 | rc = -ENOMEM; |
Christopher J. PeBenito | e47c8fc | 2007-05-23 09:12:09 -0400 | [diff] [blame] | 1599 | inode = sel_make_inode(dir->d_sb, S_IFREG|S_IRUGO); |
Eric Paris | b77a493 | 2010-11-23 11:40:08 -0500 | [diff] [blame^] | 1600 | if (!inode) |
| 1601 | goto out; |
| 1602 | |
Christopher J. PeBenito | e47c8fc | 2007-05-23 09:12:09 -0400 | [diff] [blame] | 1603 | inode->i_fop = &sel_perm_ops; |
| 1604 | /* i+1 since perm values are 1-indexed */ |
wzt.wzt@gmail.com | c1a7368 | 2010-04-09 19:30:29 +0800 | [diff] [blame] | 1605 | inode->i_ino = sel_perm_to_ino(classvalue, i + 1); |
Christopher J. PeBenito | e47c8fc | 2007-05-23 09:12:09 -0400 | [diff] [blame] | 1606 | d_add(dentry, inode); |
| 1607 | } |
Eric Paris | b77a493 | 2010-11-23 11:40:08 -0500 | [diff] [blame^] | 1608 | rc = 0; |
| 1609 | out: |
Christopher J. PeBenito | e47c8fc | 2007-05-23 09:12:09 -0400 | [diff] [blame] | 1610 | for (i = 0; i < nperms; i++) |
| 1611 | kfree(perms[i]); |
| 1612 | kfree(perms); |
Christopher J. PeBenito | e47c8fc | 2007-05-23 09:12:09 -0400 | [diff] [blame] | 1613 | return rc; |
| 1614 | } |
| 1615 | |
| 1616 | static int sel_make_class_dir_entries(char *classname, int index, |
| 1617 | struct dentry *dir) |
| 1618 | { |
| 1619 | struct dentry *dentry = NULL; |
| 1620 | struct inode *inode = NULL; |
| 1621 | int rc; |
| 1622 | |
| 1623 | dentry = d_alloc_name(dir, "index"); |
Eric Paris | b77a493 | 2010-11-23 11:40:08 -0500 | [diff] [blame^] | 1624 | if (!dentry) |
| 1625 | return -ENOMEM; |
Christopher J. PeBenito | e47c8fc | 2007-05-23 09:12:09 -0400 | [diff] [blame] | 1626 | |
| 1627 | inode = sel_make_inode(dir->d_sb, S_IFREG|S_IRUGO); |
Eric Paris | b77a493 | 2010-11-23 11:40:08 -0500 | [diff] [blame^] | 1628 | if (!inode) |
| 1629 | return -ENOMEM; |
Christopher J. PeBenito | e47c8fc | 2007-05-23 09:12:09 -0400 | [diff] [blame] | 1630 | |
| 1631 | inode->i_fop = &sel_class_ops; |
| 1632 | inode->i_ino = sel_class_to_ino(index); |
| 1633 | d_add(dentry, inode); |
| 1634 | |
| 1635 | dentry = d_alloc_name(dir, "perms"); |
Eric Paris | b77a493 | 2010-11-23 11:40:08 -0500 | [diff] [blame^] | 1636 | if (!dentry) |
| 1637 | return -ENOMEM; |
Christopher J. PeBenito | e47c8fc | 2007-05-23 09:12:09 -0400 | [diff] [blame] | 1638 | |
| 1639 | rc = sel_make_dir(dir->d_inode, dentry, &last_class_ino); |
| 1640 | if (rc) |
Eric Paris | b77a493 | 2010-11-23 11:40:08 -0500 | [diff] [blame^] | 1641 | return rc; |
Christopher J. PeBenito | e47c8fc | 2007-05-23 09:12:09 -0400 | [diff] [blame] | 1642 | |
| 1643 | rc = sel_make_perm_files(classname, index, dentry); |
| 1644 | |
Christopher J. PeBenito | e47c8fc | 2007-05-23 09:12:09 -0400 | [diff] [blame] | 1645 | return rc; |
| 1646 | } |
| 1647 | |
| 1648 | static void sel_remove_classes(void) |
| 1649 | { |
| 1650 | struct list_head *class_node; |
| 1651 | |
| 1652 | list_for_each(class_node, &class_dir->d_subdirs) { |
| 1653 | struct dentry *class_subdir = list_entry(class_node, |
| 1654 | struct dentry, d_u.d_child); |
| 1655 | struct list_head *class_subdir_node; |
| 1656 | |
| 1657 | list_for_each(class_subdir_node, &class_subdir->d_subdirs) { |
| 1658 | struct dentry *d = list_entry(class_subdir_node, |
| 1659 | struct dentry, d_u.d_child); |
| 1660 | |
| 1661 | if (d->d_inode) |
| 1662 | if (d->d_inode->i_mode & S_IFDIR) |
| 1663 | sel_remove_entries(d); |
| 1664 | } |
| 1665 | |
| 1666 | sel_remove_entries(class_subdir); |
| 1667 | } |
| 1668 | |
| 1669 | sel_remove_entries(class_dir); |
| 1670 | } |
| 1671 | |
| 1672 | static int sel_make_classes(void) |
| 1673 | { |
Eric Paris | b77a493 | 2010-11-23 11:40:08 -0500 | [diff] [blame^] | 1674 | int rc, nclasses, i; |
Christopher J. PeBenito | e47c8fc | 2007-05-23 09:12:09 -0400 | [diff] [blame] | 1675 | char **classes; |
| 1676 | |
| 1677 | /* delete any existing entries */ |
| 1678 | sel_remove_classes(); |
| 1679 | |
| 1680 | rc = security_get_classes(&classes, &nclasses); |
Eric Paris | b77a493 | 2010-11-23 11:40:08 -0500 | [diff] [blame^] | 1681 | if (rc) |
| 1682 | return rc; |
Christopher J. PeBenito | e47c8fc | 2007-05-23 09:12:09 -0400 | [diff] [blame] | 1683 | |
| 1684 | /* +2 since classes are 1-indexed */ |
wzt.wzt@gmail.com | c1a7368 | 2010-04-09 19:30:29 +0800 | [diff] [blame] | 1685 | last_class_ino = sel_class_to_ino(nclasses + 2); |
Christopher J. PeBenito | e47c8fc | 2007-05-23 09:12:09 -0400 | [diff] [blame] | 1686 | |
| 1687 | for (i = 0; i < nclasses; i++) { |
| 1688 | struct dentry *class_name_dir; |
| 1689 | |
Eric Paris | b77a493 | 2010-11-23 11:40:08 -0500 | [diff] [blame^] | 1690 | rc = -ENOMEM; |
Christopher J. PeBenito | e47c8fc | 2007-05-23 09:12:09 -0400 | [diff] [blame] | 1691 | class_name_dir = d_alloc_name(class_dir, classes[i]); |
Eric Paris | b77a493 | 2010-11-23 11:40:08 -0500 | [diff] [blame^] | 1692 | if (!class_name_dir) |
| 1693 | goto out; |
Christopher J. PeBenito | e47c8fc | 2007-05-23 09:12:09 -0400 | [diff] [blame] | 1694 | |
| 1695 | rc = sel_make_dir(class_dir->d_inode, class_name_dir, |
| 1696 | &last_class_ino); |
| 1697 | if (rc) |
Eric Paris | b77a493 | 2010-11-23 11:40:08 -0500 | [diff] [blame^] | 1698 | goto out; |
Christopher J. PeBenito | e47c8fc | 2007-05-23 09:12:09 -0400 | [diff] [blame] | 1699 | |
| 1700 | /* i+1 since class values are 1-indexed */ |
wzt.wzt@gmail.com | c1a7368 | 2010-04-09 19:30:29 +0800 | [diff] [blame] | 1701 | rc = sel_make_class_dir_entries(classes[i], i + 1, |
Christopher J. PeBenito | e47c8fc | 2007-05-23 09:12:09 -0400 | [diff] [blame] | 1702 | class_name_dir); |
| 1703 | if (rc) |
Eric Paris | b77a493 | 2010-11-23 11:40:08 -0500 | [diff] [blame^] | 1704 | goto out; |
Christopher J. PeBenito | e47c8fc | 2007-05-23 09:12:09 -0400 | [diff] [blame] | 1705 | } |
Eric Paris | b77a493 | 2010-11-23 11:40:08 -0500 | [diff] [blame^] | 1706 | rc = 0; |
| 1707 | out: |
Christopher J. PeBenito | e47c8fc | 2007-05-23 09:12:09 -0400 | [diff] [blame] | 1708 | for (i = 0; i < nclasses; i++) |
| 1709 | kfree(classes[i]); |
| 1710 | kfree(classes); |
Christopher J. PeBenito | e47c8fc | 2007-05-23 09:12:09 -0400 | [diff] [blame] | 1711 | return rc; |
| 1712 | } |
| 1713 | |
Paul Moore | 3bb56b2 | 2008-01-29 08:38:19 -0500 | [diff] [blame] | 1714 | static int sel_make_policycap(void) |
| 1715 | { |
| 1716 | unsigned int iter; |
| 1717 | struct dentry *dentry = NULL; |
| 1718 | struct inode *inode = NULL; |
| 1719 | |
| 1720 | sel_remove_entries(policycap_dir); |
| 1721 | |
| 1722 | for (iter = 0; iter <= POLICYDB_CAPABILITY_MAX; iter++) { |
| 1723 | if (iter < ARRAY_SIZE(policycap_names)) |
| 1724 | dentry = d_alloc_name(policycap_dir, |
| 1725 | policycap_names[iter]); |
| 1726 | else |
| 1727 | dentry = d_alloc_name(policycap_dir, "unknown"); |
| 1728 | |
| 1729 | if (dentry == NULL) |
| 1730 | return -ENOMEM; |
| 1731 | |
| 1732 | inode = sel_make_inode(policycap_dir->d_sb, S_IFREG | S_IRUGO); |
| 1733 | if (inode == NULL) |
| 1734 | return -ENOMEM; |
| 1735 | |
| 1736 | inode->i_fop = &sel_policycap_ops; |
| 1737 | inode->i_ino = iter | SEL_POLICYCAP_INO_OFFSET; |
| 1738 | d_add(dentry, inode); |
| 1739 | } |
| 1740 | |
| 1741 | return 0; |
| 1742 | } |
| 1743 | |
Christopher J. PeBenito | 0dd4ae5 | 2007-05-23 09:12:08 -0400 | [diff] [blame] | 1744 | static int sel_make_dir(struct inode *dir, struct dentry *dentry, |
| 1745 | unsigned long *ino) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1746 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1747 | struct inode *inode; |
| 1748 | |
James Morris | edb20fb | 2006-03-22 00:09:20 -0800 | [diff] [blame] | 1749 | inode = sel_make_inode(dir->i_sb, S_IFDIR | S_IRUGO | S_IXUGO); |
Eric Paris | b77a493 | 2010-11-23 11:40:08 -0500 | [diff] [blame^] | 1750 | if (!inode) |
| 1751 | return -ENOMEM; |
| 1752 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1753 | inode->i_op = &simple_dir_inode_operations; |
| 1754 | inode->i_fop = &simple_dir_operations; |
Christopher J. PeBenito | 0dd4ae5 | 2007-05-23 09:12:08 -0400 | [diff] [blame] | 1755 | inode->i_ino = ++(*ino); |
James Morris | 40e906f | 2006-03-22 00:09:16 -0800 | [diff] [blame] | 1756 | /* directory inodes start off with i_nlink == 2 (for "." entry) */ |
Dave Hansen | d8c76e6 | 2006-09-30 23:29:04 -0700 | [diff] [blame] | 1757 | inc_nlink(inode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1758 | d_add(dentry, inode); |
James Morris | edb20fb | 2006-03-22 00:09:20 -0800 | [diff] [blame] | 1759 | /* bump link count on parent directory, too */ |
Dave Hansen | d8c76e6 | 2006-09-30 23:29:04 -0700 | [diff] [blame] | 1760 | inc_nlink(dir); |
Eric Paris | b77a493 | 2010-11-23 11:40:08 -0500 | [diff] [blame^] | 1761 | |
| 1762 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1763 | } |
| 1764 | |
Eric Paris | 1872981 | 2008-04-17 14:15:45 -0400 | [diff] [blame] | 1765 | static int sel_fill_super(struct super_block *sb, void *data, int silent) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1766 | { |
| 1767 | int ret; |
| 1768 | struct dentry *dentry; |
James Morris | edb20fb | 2006-03-22 00:09:20 -0800 | [diff] [blame] | 1769 | struct inode *inode, *root_inode; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1770 | struct inode_security_struct *isec; |
| 1771 | |
| 1772 | static struct tree_descr selinux_files[] = { |
| 1773 | [SEL_LOAD] = {"load", &sel_load_ops, S_IRUSR|S_IWUSR}, |
| 1774 | [SEL_ENFORCE] = {"enforce", &sel_enforce_ops, S_IRUGO|S_IWUSR}, |
Stephen Smalley | ce9982d | 2005-11-08 21:34:33 -0800 | [diff] [blame] | 1775 | [SEL_CONTEXT] = {"context", &transaction_ops, S_IRUGO|S_IWUGO}, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1776 | [SEL_ACCESS] = {"access", &transaction_ops, S_IRUGO|S_IWUGO}, |
| 1777 | [SEL_CREATE] = {"create", &transaction_ops, S_IRUGO|S_IWUGO}, |
| 1778 | [SEL_RELABEL] = {"relabel", &transaction_ops, S_IRUGO|S_IWUGO}, |
| 1779 | [SEL_USER] = {"user", &transaction_ops, S_IRUGO|S_IWUGO}, |
| 1780 | [SEL_POLICYVERS] = {"policyvers", &sel_policyvers_ops, S_IRUGO}, |
| 1781 | [SEL_COMMIT_BOOLS] = {"commit_pending_bools", &sel_commit_bools_ops, S_IWUSR}, |
| 1782 | [SEL_MLS] = {"mls", &sel_mls_ops, S_IRUGO}, |
| 1783 | [SEL_DISABLE] = {"disable", &sel_disable_ops, S_IWUSR}, |
| 1784 | [SEL_MEMBER] = {"member", &transaction_ops, S_IRUGO|S_IWUGO}, |
| 1785 | [SEL_CHECKREQPROT] = {"checkreqprot", &sel_checkreqprot_ops, S_IRUGO|S_IWUSR}, |
Eric Paris | 3f12070 | 2007-09-21 14:37:10 -0400 | [diff] [blame] | 1786 | [SEL_REJECT_UNKNOWN] = {"reject_unknown", &sel_handle_unknown_ops, S_IRUGO}, |
| 1787 | [SEL_DENY_UNKNOWN] = {"deny_unknown", &sel_handle_unknown_ops, S_IRUGO}, |
KaiGai Kohei | 1190416 | 2010-09-14 18:28:39 +0900 | [diff] [blame] | 1788 | [SEL_STATUS] = {"status", &sel_handle_status_ops, S_IRUGO}, |
Eric Paris | cee74f4 | 2010-10-13 17:50:25 -0400 | [diff] [blame] | 1789 | [SEL_POLICY] = {"policy", &sel_policy_ops, S_IRUSR}, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1790 | /* last one */ {""} |
| 1791 | }; |
| 1792 | ret = simple_fill_super(sb, SELINUX_MAGIC, selinux_files); |
| 1793 | if (ret) |
James Morris | 161ce45 | 2006-03-22 00:09:17 -0800 | [diff] [blame] | 1794 | goto err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1795 | |
James Morris | edb20fb | 2006-03-22 00:09:20 -0800 | [diff] [blame] | 1796 | root_inode = sb->s_root->d_inode; |
| 1797 | |
Eric Paris | b77a493 | 2010-11-23 11:40:08 -0500 | [diff] [blame^] | 1798 | ret = -ENOMEM; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1799 | dentry = d_alloc_name(sb->s_root, BOOL_DIR_NAME); |
Eric Paris | b77a493 | 2010-11-23 11:40:08 -0500 | [diff] [blame^] | 1800 | if (!dentry) |
James Morris | 161ce45 | 2006-03-22 00:09:17 -0800 | [diff] [blame] | 1801 | goto err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1802 | |
Christopher J. PeBenito | 0dd4ae5 | 2007-05-23 09:12:08 -0400 | [diff] [blame] | 1803 | ret = sel_make_dir(root_inode, dentry, &sel_last_ino); |
James Morris | cde174a | 2006-03-22 00:09:17 -0800 | [diff] [blame] | 1804 | if (ret) |
James Morris | 161ce45 | 2006-03-22 00:09:17 -0800 | [diff] [blame] | 1805 | goto err; |
James Morris | cde174a | 2006-03-22 00:09:17 -0800 | [diff] [blame] | 1806 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1807 | bool_dir = dentry; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1808 | |
Eric Paris | b77a493 | 2010-11-23 11:40:08 -0500 | [diff] [blame^] | 1809 | ret = -ENOMEM; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1810 | dentry = d_alloc_name(sb->s_root, NULL_FILE_NAME); |
Eric Paris | b77a493 | 2010-11-23 11:40:08 -0500 | [diff] [blame^] | 1811 | if (!dentry) |
James Morris | 161ce45 | 2006-03-22 00:09:17 -0800 | [diff] [blame] | 1812 | goto err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1813 | |
Eric Paris | b77a493 | 2010-11-23 11:40:08 -0500 | [diff] [blame^] | 1814 | ret = -ENOMEM; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1815 | inode = sel_make_inode(sb, S_IFCHR | S_IRUGO | S_IWUGO); |
Eric Paris | b77a493 | 2010-11-23 11:40:08 -0500 | [diff] [blame^] | 1816 | if (!inode) |
James Morris | 161ce45 | 2006-03-22 00:09:17 -0800 | [diff] [blame] | 1817 | goto err; |
Eric Paris | b77a493 | 2010-11-23 11:40:08 -0500 | [diff] [blame^] | 1818 | |
James Carter | 6174eaf | 2007-04-04 16:18:39 -0400 | [diff] [blame] | 1819 | inode->i_ino = ++sel_last_ino; |
Eric Paris | 1872981 | 2008-04-17 14:15:45 -0400 | [diff] [blame] | 1820 | isec = (struct inode_security_struct *)inode->i_security; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1821 | isec->sid = SECINITSID_DEVNULL; |
| 1822 | isec->sclass = SECCLASS_CHR_FILE; |
| 1823 | isec->initialized = 1; |
| 1824 | |
| 1825 | init_special_inode(inode, S_IFCHR | S_IRUGO | S_IWUGO, MKDEV(MEM_MAJOR, 3)); |
| 1826 | d_add(dentry, inode); |
| 1827 | selinux_null = dentry; |
| 1828 | |
Eric Paris | b77a493 | 2010-11-23 11:40:08 -0500 | [diff] [blame^] | 1829 | ret = -ENOMEM; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1830 | dentry = d_alloc_name(sb->s_root, "avc"); |
Eric Paris | b77a493 | 2010-11-23 11:40:08 -0500 | [diff] [blame^] | 1831 | if (!dentry) |
James Morris | 161ce45 | 2006-03-22 00:09:17 -0800 | [diff] [blame] | 1832 | goto err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1833 | |
Christopher J. PeBenito | 0dd4ae5 | 2007-05-23 09:12:08 -0400 | [diff] [blame] | 1834 | ret = sel_make_dir(root_inode, dentry, &sel_last_ino); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1835 | if (ret) |
James Morris | 161ce45 | 2006-03-22 00:09:17 -0800 | [diff] [blame] | 1836 | goto err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1837 | |
| 1838 | ret = sel_make_avc_files(dentry); |
| 1839 | if (ret) |
James Morris | 161ce45 | 2006-03-22 00:09:17 -0800 | [diff] [blame] | 1840 | goto err; |
James Carter | f0ee2e4 | 2007-04-04 10:11:29 -0400 | [diff] [blame] | 1841 | |
Eric Paris | b77a493 | 2010-11-23 11:40:08 -0500 | [diff] [blame^] | 1842 | ret = -ENOMEM; |
James Carter | f0ee2e4 | 2007-04-04 10:11:29 -0400 | [diff] [blame] | 1843 | dentry = d_alloc_name(sb->s_root, "initial_contexts"); |
Eric Paris | b77a493 | 2010-11-23 11:40:08 -0500 | [diff] [blame^] | 1844 | if (!dentry) |
James Carter | f0ee2e4 | 2007-04-04 10:11:29 -0400 | [diff] [blame] | 1845 | goto err; |
James Carter | f0ee2e4 | 2007-04-04 10:11:29 -0400 | [diff] [blame] | 1846 | |
Christopher J. PeBenito | 0dd4ae5 | 2007-05-23 09:12:08 -0400 | [diff] [blame] | 1847 | ret = sel_make_dir(root_inode, dentry, &sel_last_ino); |
James Carter | f0ee2e4 | 2007-04-04 10:11:29 -0400 | [diff] [blame] | 1848 | if (ret) |
| 1849 | goto err; |
| 1850 | |
| 1851 | ret = sel_make_initcon_files(dentry); |
| 1852 | if (ret) |
| 1853 | goto err; |
| 1854 | |
Eric Paris | b77a493 | 2010-11-23 11:40:08 -0500 | [diff] [blame^] | 1855 | ret = -ENOMEM; |
Christopher J. PeBenito | e47c8fc | 2007-05-23 09:12:09 -0400 | [diff] [blame] | 1856 | dentry = d_alloc_name(sb->s_root, "class"); |
Eric Paris | b77a493 | 2010-11-23 11:40:08 -0500 | [diff] [blame^] | 1857 | if (!dentry) |
Christopher J. PeBenito | e47c8fc | 2007-05-23 09:12:09 -0400 | [diff] [blame] | 1858 | goto err; |
Christopher J. PeBenito | e47c8fc | 2007-05-23 09:12:09 -0400 | [diff] [blame] | 1859 | |
| 1860 | ret = sel_make_dir(root_inode, dentry, &sel_last_ino); |
| 1861 | if (ret) |
| 1862 | goto err; |
| 1863 | |
| 1864 | class_dir = dentry; |
| 1865 | |
Eric Paris | b77a493 | 2010-11-23 11:40:08 -0500 | [diff] [blame^] | 1866 | ret = -ENOMEM; |
Paul Moore | 3bb56b2 | 2008-01-29 08:38:19 -0500 | [diff] [blame] | 1867 | dentry = d_alloc_name(sb->s_root, "policy_capabilities"); |
Eric Paris | b77a493 | 2010-11-23 11:40:08 -0500 | [diff] [blame^] | 1868 | if (!dentry) |
Paul Moore | 3bb56b2 | 2008-01-29 08:38:19 -0500 | [diff] [blame] | 1869 | goto err; |
Paul Moore | 3bb56b2 | 2008-01-29 08:38:19 -0500 | [diff] [blame] | 1870 | |
| 1871 | ret = sel_make_dir(root_inode, dentry, &sel_last_ino); |
| 1872 | if (ret) |
| 1873 | goto err; |
| 1874 | |
| 1875 | policycap_dir = dentry; |
| 1876 | |
Eric Paris | b77a493 | 2010-11-23 11:40:08 -0500 | [diff] [blame^] | 1877 | return 0; |
James Morris | 161ce45 | 2006-03-22 00:09:17 -0800 | [diff] [blame] | 1878 | err: |
Eric Paris | 744ba35 | 2008-04-17 11:52:44 -0400 | [diff] [blame] | 1879 | printk(KERN_ERR "SELinux: %s: failed while creating inodes\n", |
| 1880 | __func__); |
Eric Paris | b77a493 | 2010-11-23 11:40:08 -0500 | [diff] [blame^] | 1881 | return ret; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1882 | } |
| 1883 | |
Al Viro | fc14f2f | 2010-07-25 01:48:30 +0400 | [diff] [blame] | 1884 | static struct dentry *sel_mount(struct file_system_type *fs_type, |
| 1885 | int flags, const char *dev_name, void *data) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1886 | { |
Al Viro | fc14f2f | 2010-07-25 01:48:30 +0400 | [diff] [blame] | 1887 | return mount_single(fs_type, flags, data, sel_fill_super); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1888 | } |
| 1889 | |
| 1890 | static struct file_system_type sel_fs_type = { |
| 1891 | .name = "selinuxfs", |
Al Viro | fc14f2f | 2010-07-25 01:48:30 +0400 | [diff] [blame] | 1892 | .mount = sel_mount, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1893 | .kill_sb = kill_litter_super, |
| 1894 | }; |
| 1895 | |
| 1896 | struct vfsmount *selinuxfs_mount; |
| 1897 | |
| 1898 | static int __init init_sel_fs(void) |
| 1899 | { |
| 1900 | int err; |
| 1901 | |
| 1902 | if (!selinux_enabled) |
| 1903 | return 0; |
| 1904 | err = register_filesystem(&sel_fs_type); |
Eric Paris | b77a493 | 2010-11-23 11:40:08 -0500 | [diff] [blame^] | 1905 | if (err) |
| 1906 | return err; |
| 1907 | |
| 1908 | selinuxfs_mount = kern_mount(&sel_fs_type); |
| 1909 | if (IS_ERR(selinuxfs_mount)) { |
| 1910 | printk(KERN_ERR "selinuxfs: could not mount!\n"); |
| 1911 | err = PTR_ERR(selinuxfs_mount); |
| 1912 | selinuxfs_mount = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1913 | } |
Eric Paris | b77a493 | 2010-11-23 11:40:08 -0500 | [diff] [blame^] | 1914 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1915 | return err; |
| 1916 | } |
| 1917 | |
| 1918 | __initcall(init_sel_fs); |
| 1919 | |
| 1920 | #ifdef CONFIG_SECURITY_SELINUX_DISABLE |
| 1921 | void exit_sel_fs(void) |
| 1922 | { |
| 1923 | unregister_filesystem(&sel_fs_type); |
| 1924 | } |
| 1925 | #endif |