Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* Updated: Karl MacMillan <kmacmillan@tresys.com> |
| 2 | * |
| 3 | * Added conditional policy language extensions |
| 4 | * |
Paul Moore | 3bb56b2 | 2008-01-29 08:38:19 -0500 | [diff] [blame] | 5 | * Updated: Hewlett-Packard <paul.moore@hp.com> |
| 6 | * |
| 7 | * Added support for the policy capability bitmap |
| 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 |
| 13 | * it under the terms of the GNU General Public License as published by |
| 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> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 30 | #include <asm/uaccess.h> |
| 31 | #include <asm/semaphore.h> |
| 32 | |
| 33 | /* selinuxfs pseudo filesystem for exporting the security policy API. |
| 34 | Based on the proc code and the fs/nfsd/nfsctl.c code. */ |
| 35 | |
| 36 | #include "flask.h" |
| 37 | #include "avc.h" |
| 38 | #include "avc_ss.h" |
| 39 | #include "security.h" |
| 40 | #include "objsec.h" |
| 41 | #include "conditional.h" |
| 42 | |
Paul Moore | 3bb56b2 | 2008-01-29 08:38:19 -0500 | [diff] [blame] | 43 | /* Policy capability filenames */ |
| 44 | static char *policycap_names[] = { |
Eric Paris | b0c636b | 2008-02-28 12:58:40 -0500 | [diff] [blame] | 45 | "network_peer_controls", |
| 46 | "open_perms" |
Paul Moore | 3bb56b2 | 2008-01-29 08:38:19 -0500 | [diff] [blame] | 47 | }; |
| 48 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 49 | unsigned int selinux_checkreqprot = CONFIG_SECURITY_SELINUX_CHECKREQPROT_VALUE; |
| 50 | |
James Morris | 4e5ab4c | 2006-06-09 00:33:33 -0700 | [diff] [blame] | 51 | #ifdef CONFIG_SECURITY_SELINUX_ENABLE_SECMARK_DEFAULT |
| 52 | #define SELINUX_COMPAT_NET_VALUE 0 |
| 53 | #else |
| 54 | #define SELINUX_COMPAT_NET_VALUE 1 |
| 55 | #endif |
| 56 | |
| 57 | int selinux_compat_net = SELINUX_COMPAT_NET_VALUE; |
| 58 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 59 | static int __init checkreqprot_setup(char *str) |
| 60 | { |
| 61 | selinux_checkreqprot = simple_strtoul(str,NULL,0) ? 1 : 0; |
| 62 | return 1; |
| 63 | } |
| 64 | __setup("checkreqprot=", checkreqprot_setup); |
| 65 | |
James Morris | 4e5ab4c | 2006-06-09 00:33:33 -0700 | [diff] [blame] | 66 | static int __init selinux_compat_net_setup(char *str) |
| 67 | { |
| 68 | selinux_compat_net = simple_strtoul(str,NULL,0) ? 1 : 0; |
| 69 | return 1; |
| 70 | } |
| 71 | __setup("selinux_compat_net=", selinux_compat_net_setup); |
| 72 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 73 | |
Ingo Molnar | bb00307 | 2006-03-22 00:09:14 -0800 | [diff] [blame] | 74 | static DEFINE_MUTEX(sel_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 75 | |
| 76 | /* global data for booleans */ |
| 77 | static struct dentry *bool_dir = NULL; |
| 78 | static int bool_num = 0; |
Stephen Smalley | d313f94 | 2007-11-26 11:12:53 -0500 | [diff] [blame] | 79 | static char **bool_pending_names; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 80 | static int *bool_pending_values = NULL; |
| 81 | |
Christopher J. PeBenito | e47c8fc | 2007-05-23 09:12:09 -0400 | [diff] [blame] | 82 | /* global data for classes */ |
| 83 | static struct dentry *class_dir = NULL; |
| 84 | static unsigned long last_class_ino; |
| 85 | |
Paul Moore | 3bb56b2 | 2008-01-29 08:38:19 -0500 | [diff] [blame] | 86 | /* global data for policy capabilities */ |
| 87 | static struct dentry *policycap_dir = NULL; |
| 88 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 89 | extern void selnl_notify_setenforce(int val); |
| 90 | |
| 91 | /* Check whether a task is allowed to use a security operation. */ |
| 92 | static int task_has_security(struct task_struct *tsk, |
| 93 | u32 perms) |
| 94 | { |
| 95 | struct task_security_struct *tsec; |
| 96 | |
| 97 | tsec = tsk->security; |
| 98 | if (!tsec) |
| 99 | return -EACCES; |
| 100 | |
| 101 | return avc_has_perm(tsec->sid, SECINITSID_SECURITY, |
| 102 | SECCLASS_SECURITY, perms, NULL); |
| 103 | } |
| 104 | |
| 105 | enum sel_inos { |
| 106 | SEL_ROOT_INO = 2, |
| 107 | SEL_LOAD, /* load policy */ |
| 108 | SEL_ENFORCE, /* get or set enforcing status */ |
| 109 | SEL_CONTEXT, /* validate context */ |
| 110 | SEL_ACCESS, /* compute access decision */ |
| 111 | SEL_CREATE, /* compute create labeling decision */ |
| 112 | SEL_RELABEL, /* compute relabeling decision */ |
| 113 | SEL_USER, /* compute reachable user contexts */ |
| 114 | SEL_POLICYVERS, /* return policy version for this kernel */ |
| 115 | SEL_COMMIT_BOOLS, /* commit new boolean values */ |
| 116 | SEL_MLS, /* return if MLS policy is enabled */ |
| 117 | SEL_DISABLE, /* disable SELinux until next reboot */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 118 | SEL_MEMBER, /* compute polyinstantiation membership decision */ |
| 119 | SEL_CHECKREQPROT, /* check requested protection, not kernel-applied one */ |
James Morris | 4e5ab4c | 2006-06-09 00:33:33 -0700 | [diff] [blame] | 120 | SEL_COMPAT_NET, /* whether to use old compat network packet controls */ |
Eric Paris | 3f12070 | 2007-09-21 14:37:10 -0400 | [diff] [blame] | 121 | SEL_REJECT_UNKNOWN, /* export unknown reject handling to userspace */ |
| 122 | SEL_DENY_UNKNOWN, /* export unknown deny handling to userspace */ |
James Carter | 6174eaf | 2007-04-04 16:18:39 -0400 | [diff] [blame] | 123 | SEL_INO_NEXT, /* The next inode number to use */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 124 | }; |
| 125 | |
James Carter | 6174eaf | 2007-04-04 16:18:39 -0400 | [diff] [blame] | 126 | static unsigned long sel_last_ino = SEL_INO_NEXT - 1; |
| 127 | |
Paul Moore | 3bb56b2 | 2008-01-29 08:38:19 -0500 | [diff] [blame] | 128 | #define SEL_INITCON_INO_OFFSET 0x01000000 |
| 129 | #define SEL_BOOL_INO_OFFSET 0x02000000 |
| 130 | #define SEL_CLASS_INO_OFFSET 0x04000000 |
| 131 | #define SEL_POLICYCAP_INO_OFFSET 0x08000000 |
| 132 | #define SEL_INO_MASK 0x00ffffff |
James Carter | f0ee2e4 | 2007-04-04 10:11:29 -0400 | [diff] [blame] | 133 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 134 | #define TMPBUFLEN 12 |
| 135 | static ssize_t sel_read_enforce(struct file *filp, char __user *buf, |
| 136 | size_t count, loff_t *ppos) |
| 137 | { |
| 138 | char tmpbuf[TMPBUFLEN]; |
| 139 | ssize_t length; |
| 140 | |
| 141 | length = scnprintf(tmpbuf, TMPBUFLEN, "%d", selinux_enforcing); |
| 142 | return simple_read_from_buffer(buf, count, ppos, tmpbuf, length); |
| 143 | } |
| 144 | |
| 145 | #ifdef CONFIG_SECURITY_SELINUX_DEVELOP |
| 146 | static ssize_t sel_write_enforce(struct file * file, const char __user * buf, |
| 147 | size_t count, loff_t *ppos) |
| 148 | |
| 149 | { |
| 150 | char *page; |
| 151 | ssize_t length; |
| 152 | int new_value; |
| 153 | |
Davi Arnaut | bfd5162 | 2005-10-30 14:59:24 -0800 | [diff] [blame] | 154 | if (count >= PAGE_SIZE) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 155 | return -ENOMEM; |
| 156 | if (*ppos != 0) { |
| 157 | /* No partial writes. */ |
| 158 | return -EINVAL; |
| 159 | } |
| 160 | page = (char*)get_zeroed_page(GFP_KERNEL); |
| 161 | if (!page) |
| 162 | return -ENOMEM; |
| 163 | length = -EFAULT; |
| 164 | if (copy_from_user(page, buf, count)) |
| 165 | goto out; |
| 166 | |
| 167 | length = -EINVAL; |
| 168 | if (sscanf(page, "%d", &new_value) != 1) |
| 169 | goto out; |
| 170 | |
| 171 | if (new_value != selinux_enforcing) { |
| 172 | length = task_has_security(current, SECURITY__SETENFORCE); |
| 173 | if (length) |
| 174 | goto out; |
Steve Grubb | af601e4 | 2006-01-04 14:08:39 +0000 | [diff] [blame] | 175 | audit_log(current->audit_context, GFP_KERNEL, AUDIT_MAC_STATUS, |
Eric Paris | 4746ec5 | 2008-01-08 10:06:53 -0500 | [diff] [blame] | 176 | "enforcing=%d old_enforcing=%d auid=%u ses=%u", |
| 177 | new_value, selinux_enforcing, |
| 178 | audit_get_loginuid(current), |
| 179 | audit_get_sessionid(current)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 180 | selinux_enforcing = new_value; |
| 181 | if (selinux_enforcing) |
| 182 | avc_ss_reset(0); |
| 183 | selnl_notify_setenforce(selinux_enforcing); |
| 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, |
| 197 | }; |
| 198 | |
Eric Paris | 3f12070 | 2007-09-21 14:37:10 -0400 | [diff] [blame] | 199 | static ssize_t sel_read_handle_unknown(struct file *filp, char __user *buf, |
| 200 | size_t count, loff_t *ppos) |
| 201 | { |
| 202 | char tmpbuf[TMPBUFLEN]; |
| 203 | ssize_t length; |
| 204 | ino_t ino = filp->f_path.dentry->d_inode->i_ino; |
| 205 | int handle_unknown = (ino == SEL_REJECT_UNKNOWN) ? |
| 206 | security_get_reject_unknown() : !security_get_allow_unknown(); |
| 207 | |
| 208 | length = scnprintf(tmpbuf, TMPBUFLEN, "%d", handle_unknown); |
| 209 | return simple_read_from_buffer(buf, count, ppos, tmpbuf, length); |
| 210 | } |
| 211 | |
| 212 | static const struct file_operations sel_handle_unknown_ops = { |
| 213 | .read = sel_read_handle_unknown, |
| 214 | }; |
| 215 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 216 | #ifdef CONFIG_SECURITY_SELINUX_DISABLE |
| 217 | static ssize_t sel_write_disable(struct file * file, const char __user * buf, |
| 218 | size_t count, loff_t *ppos) |
| 219 | |
| 220 | { |
| 221 | char *page; |
| 222 | ssize_t length; |
| 223 | int new_value; |
| 224 | extern int selinux_disable(void); |
| 225 | |
Davi Arnaut | bfd5162 | 2005-10-30 14:59:24 -0800 | [diff] [blame] | 226 | if (count >= PAGE_SIZE) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 227 | return -ENOMEM; |
| 228 | if (*ppos != 0) { |
| 229 | /* No partial writes. */ |
| 230 | return -EINVAL; |
| 231 | } |
| 232 | page = (char*)get_zeroed_page(GFP_KERNEL); |
| 233 | if (!page) |
| 234 | return -ENOMEM; |
| 235 | length = -EFAULT; |
| 236 | if (copy_from_user(page, buf, count)) |
| 237 | goto out; |
| 238 | |
| 239 | length = -EINVAL; |
| 240 | if (sscanf(page, "%d", &new_value) != 1) |
| 241 | goto out; |
| 242 | |
| 243 | if (new_value) { |
| 244 | length = selinux_disable(); |
| 245 | if (length < 0) |
| 246 | goto out; |
Steve Grubb | af601e4 | 2006-01-04 14:08:39 +0000 | [diff] [blame] | 247 | audit_log(current->audit_context, GFP_KERNEL, AUDIT_MAC_STATUS, |
Eric Paris | 4746ec5 | 2008-01-08 10:06:53 -0500 | [diff] [blame] | 248 | "selinux=0 auid=%u ses=%u", |
| 249 | audit_get_loginuid(current), |
| 250 | audit_get_sessionid(current)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 251 | } |
| 252 | |
| 253 | length = count; |
| 254 | out: |
| 255 | free_page((unsigned long) page); |
| 256 | return length; |
| 257 | } |
| 258 | #else |
| 259 | #define sel_write_disable NULL |
| 260 | #endif |
| 261 | |
Arjan van de Ven | 9c2e08c | 2007-02-12 00:55:37 -0800 | [diff] [blame] | 262 | static const struct file_operations sel_disable_ops = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 263 | .write = sel_write_disable, |
| 264 | }; |
| 265 | |
| 266 | static ssize_t sel_read_policyvers(struct file *filp, char __user *buf, |
| 267 | size_t count, loff_t *ppos) |
| 268 | { |
| 269 | char tmpbuf[TMPBUFLEN]; |
| 270 | ssize_t length; |
| 271 | |
| 272 | length = scnprintf(tmpbuf, TMPBUFLEN, "%u", POLICYDB_VERSION_MAX); |
| 273 | return simple_read_from_buffer(buf, count, ppos, tmpbuf, length); |
| 274 | } |
| 275 | |
Arjan van de Ven | 9c2e08c | 2007-02-12 00:55:37 -0800 | [diff] [blame] | 276 | static const struct file_operations sel_policyvers_ops = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 277 | .read = sel_read_policyvers, |
| 278 | }; |
| 279 | |
| 280 | /* declaration for sel_write_load */ |
| 281 | static int sel_make_bools(void); |
Christopher J. PeBenito | e47c8fc | 2007-05-23 09:12:09 -0400 | [diff] [blame] | 282 | static int sel_make_classes(void); |
Paul Moore | 3bb56b2 | 2008-01-29 08:38:19 -0500 | [diff] [blame] | 283 | static int sel_make_policycap(void); |
Christopher J. PeBenito | e47c8fc | 2007-05-23 09:12:09 -0400 | [diff] [blame] | 284 | |
| 285 | /* declaration for sel_make_class_dirs */ |
| 286 | static int sel_make_dir(struct inode *dir, struct dentry *dentry, |
| 287 | unsigned long *ino); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 288 | |
| 289 | static ssize_t sel_read_mls(struct file *filp, char __user *buf, |
| 290 | size_t count, loff_t *ppos) |
| 291 | { |
| 292 | char tmpbuf[TMPBUFLEN]; |
| 293 | ssize_t length; |
| 294 | |
| 295 | length = scnprintf(tmpbuf, TMPBUFLEN, "%d", selinux_mls_enabled); |
| 296 | return simple_read_from_buffer(buf, count, ppos, tmpbuf, length); |
| 297 | } |
| 298 | |
Arjan van de Ven | 9c2e08c | 2007-02-12 00:55:37 -0800 | [diff] [blame] | 299 | static const struct file_operations sel_mls_ops = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 300 | .read = sel_read_mls, |
| 301 | }; |
| 302 | |
| 303 | static ssize_t sel_write_load(struct file * file, const char __user * buf, |
| 304 | size_t count, loff_t *ppos) |
| 305 | |
| 306 | { |
| 307 | int ret; |
| 308 | ssize_t length; |
| 309 | void *data = NULL; |
| 310 | |
Ingo Molnar | bb00307 | 2006-03-22 00:09:14 -0800 | [diff] [blame] | 311 | mutex_lock(&sel_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 312 | |
| 313 | length = task_has_security(current, SECURITY__LOAD_POLICY); |
| 314 | if (length) |
| 315 | goto out; |
| 316 | |
| 317 | if (*ppos != 0) { |
| 318 | /* No partial writes. */ |
| 319 | length = -EINVAL; |
| 320 | goto out; |
| 321 | } |
| 322 | |
Davi Arnaut | bfd5162 | 2005-10-30 14:59:24 -0800 | [diff] [blame] | 323 | if ((count > 64 * 1024 * 1024) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 324 | || (data = vmalloc(count)) == NULL) { |
| 325 | length = -ENOMEM; |
| 326 | goto out; |
| 327 | } |
| 328 | |
| 329 | length = -EFAULT; |
| 330 | if (copy_from_user(data, buf, count) != 0) |
| 331 | goto out; |
| 332 | |
| 333 | length = security_load_policy(data, count); |
| 334 | if (length) |
| 335 | goto out; |
| 336 | |
| 337 | ret = sel_make_bools(); |
Christopher J. PeBenito | e47c8fc | 2007-05-23 09:12:09 -0400 | [diff] [blame] | 338 | if (ret) { |
| 339 | length = ret; |
| 340 | goto out1; |
| 341 | } |
| 342 | |
| 343 | ret = sel_make_classes(); |
Paul Moore | 3bb56b2 | 2008-01-29 08:38:19 -0500 | [diff] [blame] | 344 | if (ret) { |
| 345 | length = ret; |
| 346 | goto out1; |
| 347 | } |
| 348 | |
| 349 | ret = sel_make_policycap(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 350 | if (ret) |
| 351 | length = ret; |
| 352 | else |
| 353 | length = count; |
Christopher J. PeBenito | e47c8fc | 2007-05-23 09:12:09 -0400 | [diff] [blame] | 354 | |
| 355 | out1: |
Eric Paris | 3f12070 | 2007-09-21 14:37:10 -0400 | [diff] [blame] | 356 | |
| 357 | printk(KERN_INFO "SELinux: policy loaded with handle_unknown=%s\n", |
| 358 | (security_get_reject_unknown() ? "reject" : |
| 359 | (security_get_allow_unknown() ? "allow" : "deny"))); |
| 360 | |
Steve Grubb | af601e4 | 2006-01-04 14:08:39 +0000 | [diff] [blame] | 361 | audit_log(current->audit_context, GFP_KERNEL, AUDIT_MAC_POLICY_LOAD, |
Eric Paris | 4746ec5 | 2008-01-08 10:06:53 -0500 | [diff] [blame] | 362 | "policy loaded auid=%u ses=%u", |
| 363 | audit_get_loginuid(current), |
| 364 | audit_get_sessionid(current)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 365 | out: |
Ingo Molnar | bb00307 | 2006-03-22 00:09:14 -0800 | [diff] [blame] | 366 | mutex_unlock(&sel_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 367 | vfree(data); |
| 368 | return length; |
| 369 | } |
| 370 | |
Arjan van de Ven | 9c2e08c | 2007-02-12 00:55:37 -0800 | [diff] [blame] | 371 | static const struct file_operations sel_load_ops = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 372 | .write = sel_write_load, |
| 373 | }; |
| 374 | |
Stephen Smalley | ce9982d | 2005-11-08 21:34:33 -0800 | [diff] [blame] | 375 | 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] | 376 | { |
Stephen Smalley | ce9982d | 2005-11-08 21:34:33 -0800 | [diff] [blame] | 377 | char *canon; |
| 378 | u32 sid, len; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 379 | ssize_t length; |
| 380 | |
| 381 | length = task_has_security(current, SECURITY__CHECK_CONTEXT); |
| 382 | if (length) |
| 383 | return length; |
| 384 | |
Stephen Smalley | ce9982d | 2005-11-08 21:34:33 -0800 | [diff] [blame] | 385 | length = security_context_to_sid(buf, size, &sid); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 386 | if (length < 0) |
Stephen Smalley | ce9982d | 2005-11-08 21:34:33 -0800 | [diff] [blame] | 387 | return length; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 388 | |
Stephen Smalley | ce9982d | 2005-11-08 21:34:33 -0800 | [diff] [blame] | 389 | length = security_sid_to_context(sid, &canon, &len); |
| 390 | if (length < 0) |
| 391 | return length; |
| 392 | |
| 393 | if (len > SIMPLE_TRANSACTION_LIMIT) { |
Eric Paris | 744ba35 | 2008-04-17 11:52:44 -0400 | [diff] [blame^] | 394 | printk(KERN_ERR "SELinux: %s: context size (%u) exceeds " |
| 395 | "payload max\n", __func__, len); |
Stephen Smalley | ce9982d | 2005-11-08 21:34:33 -0800 | [diff] [blame] | 396 | length = -ERANGE; |
| 397 | goto out; |
| 398 | } |
| 399 | |
| 400 | memcpy(buf, canon, len); |
| 401 | length = len; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 402 | out: |
Stephen Smalley | ce9982d | 2005-11-08 21:34:33 -0800 | [diff] [blame] | 403 | kfree(canon); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 404 | return length; |
| 405 | } |
| 406 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 407 | static ssize_t sel_read_checkreqprot(struct file *filp, char __user *buf, |
| 408 | size_t count, loff_t *ppos) |
| 409 | { |
| 410 | char tmpbuf[TMPBUFLEN]; |
| 411 | ssize_t length; |
| 412 | |
| 413 | length = scnprintf(tmpbuf, TMPBUFLEN, "%u", selinux_checkreqprot); |
| 414 | return simple_read_from_buffer(buf, count, ppos, tmpbuf, length); |
| 415 | } |
| 416 | |
| 417 | static ssize_t sel_write_checkreqprot(struct file * file, const char __user * buf, |
| 418 | size_t count, loff_t *ppos) |
| 419 | { |
| 420 | char *page; |
| 421 | ssize_t length; |
| 422 | unsigned int new_value; |
| 423 | |
| 424 | length = task_has_security(current, SECURITY__SETCHECKREQPROT); |
| 425 | if (length) |
| 426 | return length; |
| 427 | |
Davi Arnaut | bfd5162 | 2005-10-30 14:59:24 -0800 | [diff] [blame] | 428 | if (count >= PAGE_SIZE) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 429 | return -ENOMEM; |
| 430 | if (*ppos != 0) { |
| 431 | /* No partial writes. */ |
| 432 | return -EINVAL; |
| 433 | } |
| 434 | page = (char*)get_zeroed_page(GFP_KERNEL); |
| 435 | if (!page) |
| 436 | return -ENOMEM; |
| 437 | length = -EFAULT; |
| 438 | if (copy_from_user(page, buf, count)) |
| 439 | goto out; |
| 440 | |
| 441 | length = -EINVAL; |
| 442 | if (sscanf(page, "%u", &new_value) != 1) |
| 443 | goto out; |
| 444 | |
| 445 | selinux_checkreqprot = new_value ? 1 : 0; |
| 446 | length = count; |
| 447 | out: |
| 448 | free_page((unsigned long) page); |
| 449 | return length; |
| 450 | } |
Arjan van de Ven | 9c2e08c | 2007-02-12 00:55:37 -0800 | [diff] [blame] | 451 | static const struct file_operations sel_checkreqprot_ops = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 452 | .read = sel_read_checkreqprot, |
| 453 | .write = sel_write_checkreqprot, |
| 454 | }; |
| 455 | |
James Morris | 4e5ab4c | 2006-06-09 00:33:33 -0700 | [diff] [blame] | 456 | static ssize_t sel_read_compat_net(struct file *filp, char __user *buf, |
| 457 | size_t count, loff_t *ppos) |
| 458 | { |
| 459 | char tmpbuf[TMPBUFLEN]; |
| 460 | ssize_t length; |
| 461 | |
| 462 | length = scnprintf(tmpbuf, TMPBUFLEN, "%d", selinux_compat_net); |
| 463 | return simple_read_from_buffer(buf, count, ppos, tmpbuf, length); |
| 464 | } |
| 465 | |
| 466 | static ssize_t sel_write_compat_net(struct file * file, const char __user * buf, |
| 467 | size_t count, loff_t *ppos) |
| 468 | { |
| 469 | char *page; |
| 470 | ssize_t length; |
| 471 | int new_value; |
| 472 | |
| 473 | length = task_has_security(current, SECURITY__LOAD_POLICY); |
| 474 | if (length) |
| 475 | return length; |
| 476 | |
| 477 | if (count >= PAGE_SIZE) |
| 478 | return -ENOMEM; |
| 479 | if (*ppos != 0) { |
| 480 | /* No partial writes. */ |
| 481 | return -EINVAL; |
| 482 | } |
| 483 | page = (char*)get_zeroed_page(GFP_KERNEL); |
| 484 | if (!page) |
| 485 | return -ENOMEM; |
| 486 | length = -EFAULT; |
| 487 | if (copy_from_user(page, buf, count)) |
| 488 | goto out; |
| 489 | |
| 490 | length = -EINVAL; |
| 491 | if (sscanf(page, "%d", &new_value) != 1) |
| 492 | goto out; |
| 493 | |
| 494 | selinux_compat_net = new_value ? 1 : 0; |
| 495 | length = count; |
| 496 | out: |
| 497 | free_page((unsigned long) page); |
| 498 | return length; |
| 499 | } |
Arjan van de Ven | 9c2e08c | 2007-02-12 00:55:37 -0800 | [diff] [blame] | 500 | static const struct file_operations sel_compat_net_ops = { |
James Morris | 4e5ab4c | 2006-06-09 00:33:33 -0700 | [diff] [blame] | 501 | .read = sel_read_compat_net, |
| 502 | .write = sel_write_compat_net, |
| 503 | }; |
| 504 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 505 | /* |
| 506 | * Remaining nodes use transaction based IO methods like nfsd/nfsctl.c |
| 507 | */ |
| 508 | static ssize_t sel_write_access(struct file * file, char *buf, size_t size); |
| 509 | static ssize_t sel_write_create(struct file * file, char *buf, size_t size); |
| 510 | static ssize_t sel_write_relabel(struct file * file, char *buf, size_t size); |
| 511 | static ssize_t sel_write_user(struct file * file, char *buf, size_t size); |
| 512 | static ssize_t sel_write_member(struct file * file, char *buf, size_t size); |
| 513 | |
| 514 | static ssize_t (*write_op[])(struct file *, char *, size_t) = { |
| 515 | [SEL_ACCESS] = sel_write_access, |
| 516 | [SEL_CREATE] = sel_write_create, |
| 517 | [SEL_RELABEL] = sel_write_relabel, |
| 518 | [SEL_USER] = sel_write_user, |
| 519 | [SEL_MEMBER] = sel_write_member, |
Stephen Smalley | ce9982d | 2005-11-08 21:34:33 -0800 | [diff] [blame] | 520 | [SEL_CONTEXT] = sel_write_context, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 521 | }; |
| 522 | |
| 523 | static ssize_t selinux_transaction_write(struct file *file, const char __user *buf, size_t size, loff_t *pos) |
| 524 | { |
Josef Sipek | 3d5ff52 | 2006-12-08 02:37:38 -0800 | [diff] [blame] | 525 | ino_t ino = file->f_path.dentry->d_inode->i_ino; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 526 | char *data; |
| 527 | ssize_t rv; |
| 528 | |
Nicolas Kaiser | 6e20a64 | 2006-01-06 00:11:22 -0800 | [diff] [blame] | 529 | if (ino >= ARRAY_SIZE(write_op) || !write_op[ino]) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 530 | return -EINVAL; |
| 531 | |
| 532 | data = simple_transaction_get(file, buf, size); |
| 533 | if (IS_ERR(data)) |
| 534 | return PTR_ERR(data); |
| 535 | |
| 536 | rv = write_op[ino](file, data, size); |
| 537 | if (rv>0) { |
| 538 | simple_transaction_set(file, rv); |
| 539 | rv = size; |
| 540 | } |
| 541 | return rv; |
| 542 | } |
| 543 | |
Arjan van de Ven | 9c2e08c | 2007-02-12 00:55:37 -0800 | [diff] [blame] | 544 | static const struct file_operations transaction_ops = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 545 | .write = selinux_transaction_write, |
| 546 | .read = simple_transaction_read, |
| 547 | .release = simple_transaction_release, |
| 548 | }; |
| 549 | |
| 550 | /* |
| 551 | * payload - write methods |
| 552 | * If the method has a response, the response should be put in buf, |
| 553 | * and the length returned. Otherwise return 0 or and -error. |
| 554 | */ |
| 555 | |
| 556 | static ssize_t sel_write_access(struct file * file, char *buf, size_t size) |
| 557 | { |
| 558 | char *scon, *tcon; |
| 559 | u32 ssid, tsid; |
| 560 | u16 tclass; |
| 561 | u32 req; |
| 562 | struct av_decision avd; |
| 563 | ssize_t length; |
| 564 | |
| 565 | length = task_has_security(current, SECURITY__COMPUTE_AV); |
| 566 | if (length) |
| 567 | return length; |
| 568 | |
| 569 | length = -ENOMEM; |
James Morris | 89d155e | 2005-10-30 14:59:21 -0800 | [diff] [blame] | 570 | scon = kzalloc(size+1, GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 571 | if (!scon) |
| 572 | return length; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 573 | |
James Morris | 89d155e | 2005-10-30 14:59:21 -0800 | [diff] [blame] | 574 | tcon = kzalloc(size+1, GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 575 | if (!tcon) |
| 576 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 577 | |
| 578 | length = -EINVAL; |
| 579 | if (sscanf(buf, "%s %s %hu %x", scon, tcon, &tclass, &req) != 4) |
| 580 | goto out2; |
| 581 | |
| 582 | length = security_context_to_sid(scon, strlen(scon)+1, &ssid); |
| 583 | if (length < 0) |
| 584 | goto out2; |
| 585 | length = security_context_to_sid(tcon, strlen(tcon)+1, &tsid); |
| 586 | if (length < 0) |
| 587 | goto out2; |
| 588 | |
| 589 | length = security_compute_av(ssid, tsid, tclass, req, &avd); |
| 590 | if (length < 0) |
| 591 | goto out2; |
| 592 | |
| 593 | length = scnprintf(buf, SIMPLE_TRANSACTION_LIMIT, |
| 594 | "%x %x %x %x %u", |
| 595 | avd.allowed, avd.decided, |
| 596 | avd.auditallow, avd.auditdeny, |
| 597 | avd.seqno); |
| 598 | out2: |
| 599 | kfree(tcon); |
| 600 | out: |
| 601 | kfree(scon); |
| 602 | return length; |
| 603 | } |
| 604 | |
| 605 | static ssize_t sel_write_create(struct file * file, char *buf, size_t size) |
| 606 | { |
| 607 | char *scon, *tcon; |
| 608 | u32 ssid, tsid, newsid; |
| 609 | u16 tclass; |
| 610 | ssize_t length; |
| 611 | char *newcon; |
| 612 | u32 len; |
| 613 | |
| 614 | length = task_has_security(current, SECURITY__COMPUTE_CREATE); |
| 615 | if (length) |
| 616 | return length; |
| 617 | |
| 618 | length = -ENOMEM; |
James Morris | 89d155e | 2005-10-30 14:59:21 -0800 | [diff] [blame] | 619 | scon = kzalloc(size+1, GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 620 | if (!scon) |
| 621 | return length; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 622 | |
James Morris | 89d155e | 2005-10-30 14:59:21 -0800 | [diff] [blame] | 623 | tcon = kzalloc(size+1, GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 624 | if (!tcon) |
| 625 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 626 | |
| 627 | length = -EINVAL; |
| 628 | if (sscanf(buf, "%s %s %hu", scon, tcon, &tclass) != 3) |
| 629 | goto out2; |
| 630 | |
| 631 | length = security_context_to_sid(scon, strlen(scon)+1, &ssid); |
| 632 | if (length < 0) |
| 633 | goto out2; |
| 634 | length = security_context_to_sid(tcon, strlen(tcon)+1, &tsid); |
| 635 | if (length < 0) |
| 636 | goto out2; |
| 637 | |
| 638 | length = security_transition_sid(ssid, tsid, tclass, &newsid); |
| 639 | if (length < 0) |
| 640 | goto out2; |
| 641 | |
| 642 | length = security_sid_to_context(newsid, &newcon, &len); |
| 643 | if (length < 0) |
| 644 | goto out2; |
| 645 | |
| 646 | if (len > SIMPLE_TRANSACTION_LIMIT) { |
Eric Paris | 744ba35 | 2008-04-17 11:52:44 -0400 | [diff] [blame^] | 647 | printk(KERN_ERR "SELinux: %s: context size (%u) exceeds " |
| 648 | "payload max\n", __func__, len); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 649 | length = -ERANGE; |
| 650 | goto out3; |
| 651 | } |
| 652 | |
| 653 | memcpy(buf, newcon, len); |
| 654 | length = len; |
| 655 | out3: |
| 656 | kfree(newcon); |
| 657 | out2: |
| 658 | kfree(tcon); |
| 659 | out: |
| 660 | kfree(scon); |
| 661 | return length; |
| 662 | } |
| 663 | |
| 664 | static ssize_t sel_write_relabel(struct file * file, char *buf, size_t size) |
| 665 | { |
| 666 | char *scon, *tcon; |
| 667 | u32 ssid, tsid, newsid; |
| 668 | u16 tclass; |
| 669 | ssize_t length; |
| 670 | char *newcon; |
| 671 | u32 len; |
| 672 | |
| 673 | length = task_has_security(current, SECURITY__COMPUTE_RELABEL); |
| 674 | if (length) |
| 675 | return length; |
| 676 | |
| 677 | length = -ENOMEM; |
James Morris | 89d155e | 2005-10-30 14:59:21 -0800 | [diff] [blame] | 678 | scon = kzalloc(size+1, GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 679 | if (!scon) |
| 680 | return length; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 681 | |
James Morris | 89d155e | 2005-10-30 14:59:21 -0800 | [diff] [blame] | 682 | tcon = kzalloc(size+1, GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 683 | if (!tcon) |
| 684 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 685 | |
| 686 | length = -EINVAL; |
| 687 | if (sscanf(buf, "%s %s %hu", scon, tcon, &tclass) != 3) |
| 688 | goto out2; |
| 689 | |
| 690 | length = security_context_to_sid(scon, strlen(scon)+1, &ssid); |
| 691 | if (length < 0) |
| 692 | goto out2; |
| 693 | length = security_context_to_sid(tcon, strlen(tcon)+1, &tsid); |
| 694 | if (length < 0) |
| 695 | goto out2; |
| 696 | |
| 697 | length = security_change_sid(ssid, tsid, tclass, &newsid); |
| 698 | if (length < 0) |
| 699 | goto out2; |
| 700 | |
| 701 | length = security_sid_to_context(newsid, &newcon, &len); |
| 702 | if (length < 0) |
| 703 | goto out2; |
| 704 | |
| 705 | if (len > SIMPLE_TRANSACTION_LIMIT) { |
| 706 | length = -ERANGE; |
| 707 | goto out3; |
| 708 | } |
| 709 | |
| 710 | memcpy(buf, newcon, len); |
| 711 | length = len; |
| 712 | out3: |
| 713 | kfree(newcon); |
| 714 | out2: |
| 715 | kfree(tcon); |
| 716 | out: |
| 717 | kfree(scon); |
| 718 | return length; |
| 719 | } |
| 720 | |
| 721 | static ssize_t sel_write_user(struct file * file, char *buf, size_t size) |
| 722 | { |
| 723 | char *con, *user, *ptr; |
| 724 | u32 sid, *sids; |
| 725 | ssize_t length; |
| 726 | char *newcon; |
| 727 | int i, rc; |
| 728 | u32 len, nsids; |
| 729 | |
| 730 | length = task_has_security(current, SECURITY__COMPUTE_USER); |
| 731 | if (length) |
| 732 | return length; |
| 733 | |
| 734 | length = -ENOMEM; |
James Morris | 89d155e | 2005-10-30 14:59:21 -0800 | [diff] [blame] | 735 | con = kzalloc(size+1, GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 736 | if (!con) |
| 737 | return length; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 738 | |
James Morris | 89d155e | 2005-10-30 14:59:21 -0800 | [diff] [blame] | 739 | user = kzalloc(size+1, GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 740 | if (!user) |
| 741 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 742 | |
| 743 | length = -EINVAL; |
| 744 | if (sscanf(buf, "%s %s", con, user) != 2) |
| 745 | goto out2; |
| 746 | |
| 747 | length = security_context_to_sid(con, strlen(con)+1, &sid); |
| 748 | if (length < 0) |
| 749 | goto out2; |
| 750 | |
| 751 | length = security_get_user_sids(sid, user, &sids, &nsids); |
| 752 | if (length < 0) |
| 753 | goto out2; |
| 754 | |
| 755 | length = sprintf(buf, "%u", nsids) + 1; |
| 756 | ptr = buf + length; |
| 757 | for (i = 0; i < nsids; i++) { |
| 758 | rc = security_sid_to_context(sids[i], &newcon, &len); |
| 759 | if (rc) { |
| 760 | length = rc; |
| 761 | goto out3; |
| 762 | } |
| 763 | if ((length + len) >= SIMPLE_TRANSACTION_LIMIT) { |
| 764 | kfree(newcon); |
| 765 | length = -ERANGE; |
| 766 | goto out3; |
| 767 | } |
| 768 | memcpy(ptr, newcon, len); |
| 769 | kfree(newcon); |
| 770 | ptr += len; |
| 771 | length += len; |
| 772 | } |
| 773 | out3: |
| 774 | kfree(sids); |
| 775 | out2: |
| 776 | kfree(user); |
| 777 | out: |
| 778 | kfree(con); |
| 779 | return length; |
| 780 | } |
| 781 | |
| 782 | static ssize_t sel_write_member(struct file * file, char *buf, size_t size) |
| 783 | { |
| 784 | char *scon, *tcon; |
| 785 | u32 ssid, tsid, newsid; |
| 786 | u16 tclass; |
| 787 | ssize_t length; |
| 788 | char *newcon; |
| 789 | u32 len; |
| 790 | |
| 791 | length = task_has_security(current, SECURITY__COMPUTE_MEMBER); |
| 792 | if (length) |
| 793 | return length; |
| 794 | |
| 795 | length = -ENOMEM; |
James Morris | 89d155e | 2005-10-30 14:59:21 -0800 | [diff] [blame] | 796 | scon = kzalloc(size+1, GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 797 | if (!scon) |
| 798 | return length; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 799 | |
James Morris | 89d155e | 2005-10-30 14:59:21 -0800 | [diff] [blame] | 800 | tcon = kzalloc(size+1, GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 801 | if (!tcon) |
| 802 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 803 | |
| 804 | length = -EINVAL; |
| 805 | if (sscanf(buf, "%s %s %hu", scon, tcon, &tclass) != 3) |
| 806 | goto out2; |
| 807 | |
| 808 | length = security_context_to_sid(scon, strlen(scon)+1, &ssid); |
| 809 | if (length < 0) |
| 810 | goto out2; |
| 811 | length = security_context_to_sid(tcon, strlen(tcon)+1, &tsid); |
| 812 | if (length < 0) |
| 813 | goto out2; |
| 814 | |
| 815 | length = security_member_sid(ssid, tsid, tclass, &newsid); |
| 816 | if (length < 0) |
| 817 | goto out2; |
| 818 | |
| 819 | length = security_sid_to_context(newsid, &newcon, &len); |
| 820 | if (length < 0) |
| 821 | goto out2; |
| 822 | |
| 823 | if (len > SIMPLE_TRANSACTION_LIMIT) { |
Eric Paris | 744ba35 | 2008-04-17 11:52:44 -0400 | [diff] [blame^] | 824 | printk(KERN_ERR "SELinux: %s: context size (%u) exceeds " |
| 825 | "payload max\n", __func__, len); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 826 | length = -ERANGE; |
| 827 | goto out3; |
| 828 | } |
| 829 | |
| 830 | memcpy(buf, newcon, len); |
| 831 | length = len; |
| 832 | out3: |
| 833 | kfree(newcon); |
| 834 | out2: |
| 835 | kfree(tcon); |
| 836 | out: |
| 837 | kfree(scon); |
| 838 | return length; |
| 839 | } |
| 840 | |
| 841 | static struct inode *sel_make_inode(struct super_block *sb, int mode) |
| 842 | { |
| 843 | struct inode *ret = new_inode(sb); |
| 844 | |
| 845 | if (ret) { |
| 846 | ret->i_mode = mode; |
| 847 | ret->i_uid = ret->i_gid = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 848 | ret->i_blocks = 0; |
| 849 | ret->i_atime = ret->i_mtime = ret->i_ctime = CURRENT_TIME; |
| 850 | } |
| 851 | return ret; |
| 852 | } |
| 853 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 854 | static ssize_t sel_read_bool(struct file *filep, char __user *buf, |
| 855 | size_t count, loff_t *ppos) |
| 856 | { |
| 857 | char *page = NULL; |
| 858 | ssize_t length; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 859 | ssize_t ret; |
| 860 | int cur_enforcing; |
Stephen Smalley | d313f94 | 2007-11-26 11:12:53 -0500 | [diff] [blame] | 861 | struct inode *inode = filep->f_path.dentry->d_inode; |
| 862 | unsigned index = inode->i_ino & SEL_INO_MASK; |
| 863 | const char *name = filep->f_path.dentry->d_name.name; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 864 | |
Ingo Molnar | bb00307 | 2006-03-22 00:09:14 -0800 | [diff] [blame] | 865 | mutex_lock(&sel_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 866 | |
Stephen Smalley | d313f94 | 2007-11-26 11:12:53 -0500 | [diff] [blame] | 867 | if (index >= bool_num || strcmp(name, bool_pending_names[index])) { |
| 868 | ret = -EINVAL; |
| 869 | goto out; |
| 870 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 871 | |
Davi Arnaut | bfd5162 | 2005-10-30 14:59:24 -0800 | [diff] [blame] | 872 | if (count > PAGE_SIZE) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 873 | ret = -EINVAL; |
| 874 | goto out; |
| 875 | } |
| 876 | if (!(page = (char*)get_zeroed_page(GFP_KERNEL))) { |
| 877 | ret = -ENOMEM; |
| 878 | goto out; |
| 879 | } |
| 880 | |
Stephen Smalley | d313f94 | 2007-11-26 11:12:53 -0500 | [diff] [blame] | 881 | cur_enforcing = security_get_bool_value(index); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 882 | if (cur_enforcing < 0) { |
| 883 | ret = cur_enforcing; |
| 884 | goto out; |
| 885 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 886 | length = scnprintf(page, PAGE_SIZE, "%d %d", cur_enforcing, |
Stephen Smalley | d313f94 | 2007-11-26 11:12:53 -0500 | [diff] [blame] | 887 | bool_pending_values[index]); |
Stephen Smalley | 68bdcf2 | 2006-03-22 00:09:15 -0800 | [diff] [blame] | 888 | ret = simple_read_from_buffer(buf, count, ppos, page, length); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 889 | out: |
Ingo Molnar | bb00307 | 2006-03-22 00:09:14 -0800 | [diff] [blame] | 890 | mutex_unlock(&sel_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 891 | if (page) |
| 892 | free_page((unsigned long)page); |
| 893 | return ret; |
| 894 | } |
| 895 | |
| 896 | static ssize_t sel_write_bool(struct file *filep, const char __user *buf, |
| 897 | size_t count, loff_t *ppos) |
| 898 | { |
| 899 | char *page = NULL; |
Stephen Smalley | d313f94 | 2007-11-26 11:12:53 -0500 | [diff] [blame] | 900 | ssize_t length; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 901 | int new_value; |
Stephen Smalley | d313f94 | 2007-11-26 11:12:53 -0500 | [diff] [blame] | 902 | struct inode *inode = filep->f_path.dentry->d_inode; |
| 903 | unsigned index = inode->i_ino & SEL_INO_MASK; |
| 904 | const char *name = filep->f_path.dentry->d_name.name; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 905 | |
Ingo Molnar | bb00307 | 2006-03-22 00:09:14 -0800 | [diff] [blame] | 906 | mutex_lock(&sel_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 907 | |
| 908 | length = task_has_security(current, SECURITY__SETBOOL); |
| 909 | if (length) |
| 910 | goto out; |
| 911 | |
Stephen Smalley | d313f94 | 2007-11-26 11:12:53 -0500 | [diff] [blame] | 912 | if (index >= bool_num || strcmp(name, bool_pending_names[index])) { |
| 913 | length = -EINVAL; |
| 914 | goto out; |
| 915 | } |
| 916 | |
Davi Arnaut | bfd5162 | 2005-10-30 14:59:24 -0800 | [diff] [blame] | 917 | if (count >= PAGE_SIZE) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 918 | length = -ENOMEM; |
| 919 | goto out; |
| 920 | } |
Stephen Smalley | d313f94 | 2007-11-26 11:12:53 -0500 | [diff] [blame] | 921 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 922 | if (*ppos != 0) { |
| 923 | /* No partial writes. */ |
Stephen Smalley | d313f94 | 2007-11-26 11:12:53 -0500 | [diff] [blame] | 924 | length = -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 925 | goto out; |
| 926 | } |
| 927 | page = (char*)get_zeroed_page(GFP_KERNEL); |
| 928 | if (!page) { |
| 929 | length = -ENOMEM; |
| 930 | goto out; |
| 931 | } |
| 932 | |
Stephen Smalley | d313f94 | 2007-11-26 11:12:53 -0500 | [diff] [blame] | 933 | length = -EFAULT; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 934 | if (copy_from_user(page, buf, count)) |
| 935 | goto out; |
| 936 | |
| 937 | length = -EINVAL; |
| 938 | if (sscanf(page, "%d", &new_value) != 1) |
| 939 | goto out; |
| 940 | |
| 941 | if (new_value) |
| 942 | new_value = 1; |
| 943 | |
Stephen Smalley | d313f94 | 2007-11-26 11:12:53 -0500 | [diff] [blame] | 944 | bool_pending_values[index] = new_value; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 945 | length = count; |
| 946 | |
| 947 | out: |
Ingo Molnar | bb00307 | 2006-03-22 00:09:14 -0800 | [diff] [blame] | 948 | mutex_unlock(&sel_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 949 | if (page) |
| 950 | free_page((unsigned long) page); |
| 951 | return length; |
| 952 | } |
| 953 | |
Arjan van de Ven | 9c2e08c | 2007-02-12 00:55:37 -0800 | [diff] [blame] | 954 | static const struct file_operations sel_bool_ops = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 955 | .read = sel_read_bool, |
| 956 | .write = sel_write_bool, |
| 957 | }; |
| 958 | |
| 959 | static ssize_t sel_commit_bools_write(struct file *filep, |
| 960 | const char __user *buf, |
| 961 | size_t count, loff_t *ppos) |
| 962 | { |
| 963 | char *page = NULL; |
Stephen Smalley | d313f94 | 2007-11-26 11:12:53 -0500 | [diff] [blame] | 964 | ssize_t length; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 965 | int new_value; |
| 966 | |
Ingo Molnar | bb00307 | 2006-03-22 00:09:14 -0800 | [diff] [blame] | 967 | mutex_lock(&sel_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 968 | |
| 969 | length = task_has_security(current, SECURITY__SETBOOL); |
| 970 | if (length) |
| 971 | goto out; |
| 972 | |
Davi Arnaut | bfd5162 | 2005-10-30 14:59:24 -0800 | [diff] [blame] | 973 | if (count >= PAGE_SIZE) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 974 | length = -ENOMEM; |
| 975 | goto out; |
| 976 | } |
| 977 | if (*ppos != 0) { |
| 978 | /* No partial writes. */ |
| 979 | goto out; |
| 980 | } |
| 981 | page = (char*)get_zeroed_page(GFP_KERNEL); |
| 982 | if (!page) { |
| 983 | length = -ENOMEM; |
| 984 | goto out; |
| 985 | } |
| 986 | |
Stephen Smalley | d313f94 | 2007-11-26 11:12:53 -0500 | [diff] [blame] | 987 | length = -EFAULT; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 988 | if (copy_from_user(page, buf, count)) |
| 989 | goto out; |
| 990 | |
| 991 | length = -EINVAL; |
| 992 | if (sscanf(page, "%d", &new_value) != 1) |
| 993 | goto out; |
| 994 | |
Davi Arnaut | 20c19e4 | 2005-10-23 12:57:16 -0700 | [diff] [blame] | 995 | if (new_value && bool_pending_values) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 996 | security_set_bools(bool_num, bool_pending_values); |
| 997 | } |
| 998 | |
| 999 | length = count; |
| 1000 | |
| 1001 | out: |
Ingo Molnar | bb00307 | 2006-03-22 00:09:14 -0800 | [diff] [blame] | 1002 | mutex_unlock(&sel_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1003 | if (page) |
| 1004 | free_page((unsigned long) page); |
| 1005 | return length; |
| 1006 | } |
| 1007 | |
Arjan van de Ven | 9c2e08c | 2007-02-12 00:55:37 -0800 | [diff] [blame] | 1008 | static const struct file_operations sel_commit_bools_ops = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1009 | .write = sel_commit_bools_write, |
| 1010 | }; |
| 1011 | |
Christopher J. PeBenito | 0c92d7c | 2007-05-23 09:12:07 -0400 | [diff] [blame] | 1012 | static void sel_remove_entries(struct dentry *de) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1013 | { |
Stephen Smalley | 0955dc0 | 2007-11-21 09:01:36 -0500 | [diff] [blame] | 1014 | struct list_head *node; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1015 | |
| 1016 | spin_lock(&dcache_lock); |
| 1017 | node = de->d_subdirs.next; |
| 1018 | while (node != &de->d_subdirs) { |
Eric Dumazet | 5160ee6 | 2006-01-08 01:03:32 -0800 | [diff] [blame] | 1019 | struct dentry *d = list_entry(node, struct dentry, d_u.d_child); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1020 | list_del_init(node); |
| 1021 | |
| 1022 | if (d->d_inode) { |
| 1023 | d = dget_locked(d); |
| 1024 | spin_unlock(&dcache_lock); |
| 1025 | d_delete(d); |
| 1026 | simple_unlink(de->d_inode, d); |
| 1027 | dput(d); |
| 1028 | spin_lock(&dcache_lock); |
| 1029 | } |
| 1030 | node = de->d_subdirs.next; |
| 1031 | } |
| 1032 | |
| 1033 | spin_unlock(&dcache_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1034 | } |
| 1035 | |
| 1036 | #define BOOL_DIR_NAME "booleans" |
| 1037 | |
| 1038 | static int sel_make_bools(void) |
| 1039 | { |
| 1040 | int i, ret = 0; |
| 1041 | ssize_t len; |
| 1042 | struct dentry *dentry = NULL; |
| 1043 | struct dentry *dir = bool_dir; |
| 1044 | struct inode *inode = NULL; |
| 1045 | struct inode_security_struct *isec; |
| 1046 | char **names = NULL, *page; |
| 1047 | int num; |
| 1048 | int *values = NULL; |
| 1049 | u32 sid; |
| 1050 | |
| 1051 | /* remove any existing files */ |
Stephen Smalley | d313f94 | 2007-11-26 11:12:53 -0500 | [diff] [blame] | 1052 | kfree(bool_pending_names); |
Jesper Juhl | 9a5f04b | 2005-06-25 14:58:51 -0700 | [diff] [blame] | 1053 | kfree(bool_pending_values); |
Stephen Smalley | d313f94 | 2007-11-26 11:12:53 -0500 | [diff] [blame] | 1054 | bool_pending_names = NULL; |
Davi Arnaut | 20c19e4 | 2005-10-23 12:57:16 -0700 | [diff] [blame] | 1055 | bool_pending_values = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1056 | |
Christopher J. PeBenito | 0c92d7c | 2007-05-23 09:12:07 -0400 | [diff] [blame] | 1057 | sel_remove_entries(dir); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1058 | |
| 1059 | if (!(page = (char*)get_zeroed_page(GFP_KERNEL))) |
| 1060 | return -ENOMEM; |
| 1061 | |
| 1062 | ret = security_get_bools(&num, &names, &values); |
| 1063 | if (ret != 0) |
| 1064 | goto out; |
| 1065 | |
| 1066 | for (i = 0; i < num; i++) { |
| 1067 | dentry = d_alloc_name(dir, names[i]); |
| 1068 | if (!dentry) { |
| 1069 | ret = -ENOMEM; |
| 1070 | goto err; |
| 1071 | } |
| 1072 | inode = sel_make_inode(dir->d_sb, S_IFREG | S_IRUGO | S_IWUSR); |
| 1073 | if (!inode) { |
| 1074 | ret = -ENOMEM; |
| 1075 | goto err; |
| 1076 | } |
| 1077 | |
| 1078 | len = snprintf(page, PAGE_SIZE, "/%s/%s", BOOL_DIR_NAME, names[i]); |
| 1079 | if (len < 0) { |
| 1080 | ret = -EINVAL; |
| 1081 | goto err; |
| 1082 | } else if (len >= PAGE_SIZE) { |
| 1083 | ret = -ENAMETOOLONG; |
| 1084 | goto err; |
| 1085 | } |
| 1086 | isec = (struct inode_security_struct*)inode->i_security; |
| 1087 | if ((ret = security_genfs_sid("selinuxfs", page, SECCLASS_FILE, &sid))) |
| 1088 | goto err; |
| 1089 | isec->sid = sid; |
| 1090 | isec->initialized = 1; |
| 1091 | inode->i_fop = &sel_bool_ops; |
James Carter | bce34bc | 2007-04-04 16:18:50 -0400 | [diff] [blame] | 1092 | inode->i_ino = i|SEL_BOOL_INO_OFFSET; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1093 | d_add(dentry, inode); |
| 1094 | } |
| 1095 | bool_num = num; |
Stephen Smalley | d313f94 | 2007-11-26 11:12:53 -0500 | [diff] [blame] | 1096 | bool_pending_names = names; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1097 | bool_pending_values = values; |
| 1098 | out: |
| 1099 | free_page((unsigned long)page); |
Stephen Smalley | d313f94 | 2007-11-26 11:12:53 -0500 | [diff] [blame] | 1100 | return ret; |
| 1101 | err: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1102 | if (names) { |
Jesper Juhl | 9a5f04b | 2005-06-25 14:58:51 -0700 | [diff] [blame] | 1103 | for (i = 0; i < num; i++) |
| 1104 | kfree(names[i]); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1105 | kfree(names); |
| 1106 | } |
Davi Arnaut | 20c19e4 | 2005-10-23 12:57:16 -0700 | [diff] [blame] | 1107 | kfree(values); |
Christopher J. PeBenito | 0c92d7c | 2007-05-23 09:12:07 -0400 | [diff] [blame] | 1108 | sel_remove_entries(dir); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1109 | ret = -ENOMEM; |
| 1110 | goto out; |
| 1111 | } |
| 1112 | |
| 1113 | #define NULL_FILE_NAME "null" |
| 1114 | |
| 1115 | struct dentry *selinux_null = NULL; |
| 1116 | |
| 1117 | static ssize_t sel_read_avc_cache_threshold(struct file *filp, char __user *buf, |
| 1118 | size_t count, loff_t *ppos) |
| 1119 | { |
| 1120 | char tmpbuf[TMPBUFLEN]; |
| 1121 | ssize_t length; |
| 1122 | |
| 1123 | length = scnprintf(tmpbuf, TMPBUFLEN, "%u", avc_cache_threshold); |
| 1124 | return simple_read_from_buffer(buf, count, ppos, tmpbuf, length); |
| 1125 | } |
| 1126 | |
| 1127 | static ssize_t sel_write_avc_cache_threshold(struct file * file, |
| 1128 | const char __user * buf, |
| 1129 | size_t count, loff_t *ppos) |
| 1130 | |
| 1131 | { |
| 1132 | char *page; |
| 1133 | ssize_t ret; |
| 1134 | int new_value; |
| 1135 | |
Davi Arnaut | bfd5162 | 2005-10-30 14:59:24 -0800 | [diff] [blame] | 1136 | if (count >= PAGE_SIZE) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1137 | ret = -ENOMEM; |
| 1138 | goto out; |
| 1139 | } |
| 1140 | |
| 1141 | if (*ppos != 0) { |
| 1142 | /* No partial writes. */ |
| 1143 | ret = -EINVAL; |
| 1144 | goto out; |
| 1145 | } |
| 1146 | |
| 1147 | page = (char*)get_zeroed_page(GFP_KERNEL); |
| 1148 | if (!page) { |
| 1149 | ret = -ENOMEM; |
| 1150 | goto out; |
| 1151 | } |
| 1152 | |
| 1153 | if (copy_from_user(page, buf, count)) { |
| 1154 | ret = -EFAULT; |
| 1155 | goto out_free; |
| 1156 | } |
| 1157 | |
| 1158 | if (sscanf(page, "%u", &new_value) != 1) { |
| 1159 | ret = -EINVAL; |
| 1160 | goto out; |
| 1161 | } |
| 1162 | |
| 1163 | if (new_value != avc_cache_threshold) { |
| 1164 | ret = task_has_security(current, SECURITY__SETSECPARAM); |
| 1165 | if (ret) |
| 1166 | goto out_free; |
| 1167 | avc_cache_threshold = new_value; |
| 1168 | } |
| 1169 | ret = count; |
| 1170 | out_free: |
| 1171 | free_page((unsigned long)page); |
| 1172 | out: |
| 1173 | return ret; |
| 1174 | } |
| 1175 | |
| 1176 | static ssize_t sel_read_avc_hash_stats(struct file *filp, char __user *buf, |
| 1177 | size_t count, loff_t *ppos) |
| 1178 | { |
| 1179 | char *page; |
| 1180 | ssize_t ret = 0; |
| 1181 | |
| 1182 | page = (char *)__get_free_page(GFP_KERNEL); |
| 1183 | if (!page) { |
| 1184 | ret = -ENOMEM; |
| 1185 | goto out; |
| 1186 | } |
| 1187 | ret = avc_get_hash_stats(page); |
| 1188 | if (ret >= 0) |
| 1189 | ret = simple_read_from_buffer(buf, count, ppos, page, ret); |
| 1190 | free_page((unsigned long)page); |
| 1191 | out: |
| 1192 | return ret; |
| 1193 | } |
| 1194 | |
Arjan van de Ven | 9c2e08c | 2007-02-12 00:55:37 -0800 | [diff] [blame] | 1195 | static const struct file_operations sel_avc_cache_threshold_ops = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1196 | .read = sel_read_avc_cache_threshold, |
| 1197 | .write = sel_write_avc_cache_threshold, |
| 1198 | }; |
| 1199 | |
Arjan van de Ven | 9c2e08c | 2007-02-12 00:55:37 -0800 | [diff] [blame] | 1200 | static const struct file_operations sel_avc_hash_stats_ops = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1201 | .read = sel_read_avc_hash_stats, |
| 1202 | }; |
| 1203 | |
| 1204 | #ifdef CONFIG_SECURITY_SELINUX_AVC_STATS |
| 1205 | static struct avc_cache_stats *sel_avc_get_stat_idx(loff_t *idx) |
| 1206 | { |
| 1207 | int cpu; |
| 1208 | |
| 1209 | for (cpu = *idx; cpu < NR_CPUS; ++cpu) { |
| 1210 | if (!cpu_possible(cpu)) |
| 1211 | continue; |
| 1212 | *idx = cpu + 1; |
| 1213 | return &per_cpu(avc_cache_stats, cpu); |
| 1214 | } |
| 1215 | return NULL; |
| 1216 | } |
| 1217 | |
| 1218 | static void *sel_avc_stats_seq_start(struct seq_file *seq, loff_t *pos) |
| 1219 | { |
| 1220 | loff_t n = *pos - 1; |
| 1221 | |
| 1222 | if (*pos == 0) |
| 1223 | return SEQ_START_TOKEN; |
| 1224 | |
| 1225 | return sel_avc_get_stat_idx(&n); |
| 1226 | } |
| 1227 | |
| 1228 | static void *sel_avc_stats_seq_next(struct seq_file *seq, void *v, loff_t *pos) |
| 1229 | { |
| 1230 | return sel_avc_get_stat_idx(pos); |
| 1231 | } |
| 1232 | |
| 1233 | static int sel_avc_stats_seq_show(struct seq_file *seq, void *v) |
| 1234 | { |
| 1235 | struct avc_cache_stats *st = v; |
| 1236 | |
| 1237 | if (v == SEQ_START_TOKEN) |
| 1238 | seq_printf(seq, "lookups hits misses allocations reclaims " |
| 1239 | "frees\n"); |
| 1240 | else |
| 1241 | seq_printf(seq, "%u %u %u %u %u %u\n", st->lookups, |
| 1242 | st->hits, st->misses, st->allocations, |
| 1243 | st->reclaims, st->frees); |
| 1244 | return 0; |
| 1245 | } |
| 1246 | |
| 1247 | static void sel_avc_stats_seq_stop(struct seq_file *seq, void *v) |
| 1248 | { } |
| 1249 | |
Jan Engelhardt | 1996a10 | 2008-01-23 00:02:58 +0100 | [diff] [blame] | 1250 | static const struct seq_operations sel_avc_cache_stats_seq_ops = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1251 | .start = sel_avc_stats_seq_start, |
| 1252 | .next = sel_avc_stats_seq_next, |
| 1253 | .show = sel_avc_stats_seq_show, |
| 1254 | .stop = sel_avc_stats_seq_stop, |
| 1255 | }; |
| 1256 | |
| 1257 | static int sel_open_avc_cache_stats(struct inode *inode, struct file *file) |
| 1258 | { |
| 1259 | return seq_open(file, &sel_avc_cache_stats_seq_ops); |
| 1260 | } |
| 1261 | |
Arjan van de Ven | 9c2e08c | 2007-02-12 00:55:37 -0800 | [diff] [blame] | 1262 | static const struct file_operations sel_avc_cache_stats_ops = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1263 | .open = sel_open_avc_cache_stats, |
| 1264 | .read = seq_read, |
| 1265 | .llseek = seq_lseek, |
| 1266 | .release = seq_release, |
| 1267 | }; |
| 1268 | #endif |
| 1269 | |
| 1270 | static int sel_make_avc_files(struct dentry *dir) |
| 1271 | { |
| 1272 | int i, ret = 0; |
| 1273 | static struct tree_descr files[] = { |
| 1274 | { "cache_threshold", |
| 1275 | &sel_avc_cache_threshold_ops, S_IRUGO|S_IWUSR }, |
| 1276 | { "hash_stats", &sel_avc_hash_stats_ops, S_IRUGO }, |
| 1277 | #ifdef CONFIG_SECURITY_SELINUX_AVC_STATS |
| 1278 | { "cache_stats", &sel_avc_cache_stats_ops, S_IRUGO }, |
| 1279 | #endif |
| 1280 | }; |
| 1281 | |
Nicolas Kaiser | 6e20a64 | 2006-01-06 00:11:22 -0800 | [diff] [blame] | 1282 | for (i = 0; i < ARRAY_SIZE(files); i++) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1283 | struct inode *inode; |
| 1284 | struct dentry *dentry; |
| 1285 | |
| 1286 | dentry = d_alloc_name(dir, files[i].name); |
| 1287 | if (!dentry) { |
| 1288 | ret = -ENOMEM; |
James Morris | d6aafa6 | 2006-03-22 00:09:19 -0800 | [diff] [blame] | 1289 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1290 | } |
| 1291 | |
| 1292 | inode = sel_make_inode(dir->d_sb, S_IFREG|files[i].mode); |
| 1293 | if (!inode) { |
| 1294 | ret = -ENOMEM; |
James Morris | d6aafa6 | 2006-03-22 00:09:19 -0800 | [diff] [blame] | 1295 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1296 | } |
| 1297 | inode->i_fop = files[i].ops; |
James Carter | 6174eaf | 2007-04-04 16:18:39 -0400 | [diff] [blame] | 1298 | inode->i_ino = ++sel_last_ino; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1299 | d_add(dentry, inode); |
| 1300 | } |
| 1301 | out: |
| 1302 | return ret; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1303 | } |
| 1304 | |
James Carter | f0ee2e4 | 2007-04-04 10:11:29 -0400 | [diff] [blame] | 1305 | static ssize_t sel_read_initcon(struct file * file, char __user *buf, |
| 1306 | size_t count, loff_t *ppos) |
| 1307 | { |
| 1308 | struct inode *inode; |
| 1309 | char *con; |
| 1310 | u32 sid, len; |
| 1311 | ssize_t ret; |
| 1312 | |
| 1313 | inode = file->f_path.dentry->d_inode; |
| 1314 | sid = inode->i_ino&SEL_INO_MASK; |
| 1315 | ret = security_sid_to_context(sid, &con, &len); |
| 1316 | if (ret < 0) |
| 1317 | return ret; |
| 1318 | |
| 1319 | ret = simple_read_from_buffer(buf, count, ppos, con, len); |
| 1320 | kfree(con); |
| 1321 | return ret; |
| 1322 | } |
| 1323 | |
| 1324 | static const struct file_operations sel_initcon_ops = { |
| 1325 | .read = sel_read_initcon, |
| 1326 | }; |
| 1327 | |
| 1328 | static int sel_make_initcon_files(struct dentry *dir) |
| 1329 | { |
| 1330 | int i, ret = 0; |
| 1331 | |
| 1332 | for (i = 1; i <= SECINITSID_NUM; i++) { |
| 1333 | struct inode *inode; |
| 1334 | struct dentry *dentry; |
| 1335 | dentry = d_alloc_name(dir, security_get_initial_sid_context(i)); |
| 1336 | if (!dentry) { |
| 1337 | ret = -ENOMEM; |
| 1338 | goto out; |
| 1339 | } |
| 1340 | |
| 1341 | inode = sel_make_inode(dir->d_sb, S_IFREG|S_IRUGO); |
| 1342 | if (!inode) { |
| 1343 | ret = -ENOMEM; |
| 1344 | goto out; |
| 1345 | } |
| 1346 | inode->i_fop = &sel_initcon_ops; |
| 1347 | inode->i_ino = i|SEL_INITCON_INO_OFFSET; |
| 1348 | d_add(dentry, inode); |
| 1349 | } |
| 1350 | out: |
| 1351 | return ret; |
| 1352 | } |
| 1353 | |
Christopher J. PeBenito | e47c8fc | 2007-05-23 09:12:09 -0400 | [diff] [blame] | 1354 | static inline unsigned int sel_div(unsigned long a, unsigned long b) |
| 1355 | { |
| 1356 | return a / b - (a % b < 0); |
| 1357 | } |
| 1358 | |
| 1359 | static inline unsigned long sel_class_to_ino(u16 class) |
| 1360 | { |
| 1361 | return (class * (SEL_VEC_MAX + 1)) | SEL_CLASS_INO_OFFSET; |
| 1362 | } |
| 1363 | |
| 1364 | static inline u16 sel_ino_to_class(unsigned long ino) |
| 1365 | { |
| 1366 | return sel_div(ino & SEL_INO_MASK, SEL_VEC_MAX + 1); |
| 1367 | } |
| 1368 | |
| 1369 | static inline unsigned long sel_perm_to_ino(u16 class, u32 perm) |
| 1370 | { |
| 1371 | return (class * (SEL_VEC_MAX + 1) + perm) | SEL_CLASS_INO_OFFSET; |
| 1372 | } |
| 1373 | |
| 1374 | static inline u32 sel_ino_to_perm(unsigned long ino) |
| 1375 | { |
| 1376 | return (ino & SEL_INO_MASK) % (SEL_VEC_MAX + 1); |
| 1377 | } |
| 1378 | |
| 1379 | static ssize_t sel_read_class(struct file * file, char __user *buf, |
| 1380 | size_t count, loff_t *ppos) |
| 1381 | { |
| 1382 | ssize_t rc, len; |
| 1383 | char *page; |
| 1384 | unsigned long ino = file->f_path.dentry->d_inode->i_ino; |
| 1385 | |
| 1386 | page = (char *)__get_free_page(GFP_KERNEL); |
| 1387 | if (!page) { |
| 1388 | rc = -ENOMEM; |
| 1389 | goto out; |
| 1390 | } |
| 1391 | |
| 1392 | len = snprintf(page, PAGE_SIZE, "%d", sel_ino_to_class(ino)); |
| 1393 | rc = simple_read_from_buffer(buf, count, ppos, page, len); |
| 1394 | free_page((unsigned long)page); |
| 1395 | out: |
| 1396 | return rc; |
| 1397 | } |
| 1398 | |
| 1399 | static const struct file_operations sel_class_ops = { |
| 1400 | .read = sel_read_class, |
| 1401 | }; |
| 1402 | |
| 1403 | static ssize_t sel_read_perm(struct file * file, char __user *buf, |
| 1404 | size_t count, loff_t *ppos) |
| 1405 | { |
| 1406 | ssize_t rc, len; |
| 1407 | char *page; |
| 1408 | unsigned long ino = file->f_path.dentry->d_inode->i_ino; |
| 1409 | |
| 1410 | page = (char *)__get_free_page(GFP_KERNEL); |
| 1411 | if (!page) { |
| 1412 | rc = -ENOMEM; |
| 1413 | goto out; |
| 1414 | } |
| 1415 | |
| 1416 | len = snprintf(page, PAGE_SIZE,"%d", sel_ino_to_perm(ino)); |
| 1417 | rc = simple_read_from_buffer(buf, count, ppos, page, len); |
| 1418 | free_page((unsigned long)page); |
| 1419 | out: |
| 1420 | return rc; |
| 1421 | } |
| 1422 | |
| 1423 | static const struct file_operations sel_perm_ops = { |
| 1424 | .read = sel_read_perm, |
| 1425 | }; |
| 1426 | |
Paul Moore | 3bb56b2 | 2008-01-29 08:38:19 -0500 | [diff] [blame] | 1427 | static ssize_t sel_read_policycap(struct file *file, char __user *buf, |
| 1428 | size_t count, loff_t *ppos) |
| 1429 | { |
| 1430 | int value; |
| 1431 | char tmpbuf[TMPBUFLEN]; |
| 1432 | ssize_t length; |
| 1433 | unsigned long i_ino = file->f_path.dentry->d_inode->i_ino; |
| 1434 | |
| 1435 | value = security_policycap_supported(i_ino & SEL_INO_MASK); |
| 1436 | length = scnprintf(tmpbuf, TMPBUFLEN, "%d", value); |
| 1437 | |
| 1438 | return simple_read_from_buffer(buf, count, ppos, tmpbuf, length); |
| 1439 | } |
| 1440 | |
| 1441 | static const struct file_operations sel_policycap_ops = { |
| 1442 | .read = sel_read_policycap, |
| 1443 | }; |
| 1444 | |
Christopher J. PeBenito | e47c8fc | 2007-05-23 09:12:09 -0400 | [diff] [blame] | 1445 | static int sel_make_perm_files(char *objclass, int classvalue, |
| 1446 | struct dentry *dir) |
| 1447 | { |
| 1448 | int i, rc = 0, nperms; |
| 1449 | char **perms; |
| 1450 | |
| 1451 | rc = security_get_permissions(objclass, &perms, &nperms); |
| 1452 | if (rc) |
| 1453 | goto out; |
| 1454 | |
| 1455 | for (i = 0; i < nperms; i++) { |
| 1456 | struct inode *inode; |
| 1457 | struct dentry *dentry; |
| 1458 | |
| 1459 | dentry = d_alloc_name(dir, perms[i]); |
| 1460 | if (!dentry) { |
| 1461 | rc = -ENOMEM; |
| 1462 | goto out1; |
| 1463 | } |
| 1464 | |
| 1465 | inode = sel_make_inode(dir->d_sb, S_IFREG|S_IRUGO); |
| 1466 | if (!inode) { |
| 1467 | rc = -ENOMEM; |
| 1468 | goto out1; |
| 1469 | } |
| 1470 | inode->i_fop = &sel_perm_ops; |
| 1471 | /* i+1 since perm values are 1-indexed */ |
| 1472 | inode->i_ino = sel_perm_to_ino(classvalue, i+1); |
| 1473 | d_add(dentry, inode); |
| 1474 | } |
| 1475 | |
| 1476 | out1: |
| 1477 | for (i = 0; i < nperms; i++) |
| 1478 | kfree(perms[i]); |
| 1479 | kfree(perms); |
| 1480 | out: |
| 1481 | return rc; |
| 1482 | } |
| 1483 | |
| 1484 | static int sel_make_class_dir_entries(char *classname, int index, |
| 1485 | struct dentry *dir) |
| 1486 | { |
| 1487 | struct dentry *dentry = NULL; |
| 1488 | struct inode *inode = NULL; |
| 1489 | int rc; |
| 1490 | |
| 1491 | dentry = d_alloc_name(dir, "index"); |
| 1492 | if (!dentry) { |
| 1493 | rc = -ENOMEM; |
| 1494 | goto out; |
| 1495 | } |
| 1496 | |
| 1497 | inode = sel_make_inode(dir->d_sb, S_IFREG|S_IRUGO); |
| 1498 | if (!inode) { |
| 1499 | rc = -ENOMEM; |
| 1500 | goto out; |
| 1501 | } |
| 1502 | |
| 1503 | inode->i_fop = &sel_class_ops; |
| 1504 | inode->i_ino = sel_class_to_ino(index); |
| 1505 | d_add(dentry, inode); |
| 1506 | |
| 1507 | dentry = d_alloc_name(dir, "perms"); |
| 1508 | if (!dentry) { |
| 1509 | rc = -ENOMEM; |
| 1510 | goto out; |
| 1511 | } |
| 1512 | |
| 1513 | rc = sel_make_dir(dir->d_inode, dentry, &last_class_ino); |
| 1514 | if (rc) |
| 1515 | goto out; |
| 1516 | |
| 1517 | rc = sel_make_perm_files(classname, index, dentry); |
| 1518 | |
| 1519 | out: |
| 1520 | return rc; |
| 1521 | } |
| 1522 | |
| 1523 | static void sel_remove_classes(void) |
| 1524 | { |
| 1525 | struct list_head *class_node; |
| 1526 | |
| 1527 | list_for_each(class_node, &class_dir->d_subdirs) { |
| 1528 | struct dentry *class_subdir = list_entry(class_node, |
| 1529 | struct dentry, d_u.d_child); |
| 1530 | struct list_head *class_subdir_node; |
| 1531 | |
| 1532 | list_for_each(class_subdir_node, &class_subdir->d_subdirs) { |
| 1533 | struct dentry *d = list_entry(class_subdir_node, |
| 1534 | struct dentry, d_u.d_child); |
| 1535 | |
| 1536 | if (d->d_inode) |
| 1537 | if (d->d_inode->i_mode & S_IFDIR) |
| 1538 | sel_remove_entries(d); |
| 1539 | } |
| 1540 | |
| 1541 | sel_remove_entries(class_subdir); |
| 1542 | } |
| 1543 | |
| 1544 | sel_remove_entries(class_dir); |
| 1545 | } |
| 1546 | |
| 1547 | static int sel_make_classes(void) |
| 1548 | { |
| 1549 | int rc = 0, nclasses, i; |
| 1550 | char **classes; |
| 1551 | |
| 1552 | /* delete any existing entries */ |
| 1553 | sel_remove_classes(); |
| 1554 | |
| 1555 | rc = security_get_classes(&classes, &nclasses); |
| 1556 | if (rc < 0) |
| 1557 | goto out; |
| 1558 | |
| 1559 | /* +2 since classes are 1-indexed */ |
| 1560 | last_class_ino = sel_class_to_ino(nclasses+2); |
| 1561 | |
| 1562 | for (i = 0; i < nclasses; i++) { |
| 1563 | struct dentry *class_name_dir; |
| 1564 | |
| 1565 | class_name_dir = d_alloc_name(class_dir, classes[i]); |
| 1566 | if (!class_name_dir) { |
| 1567 | rc = -ENOMEM; |
| 1568 | goto out1; |
| 1569 | } |
| 1570 | |
| 1571 | rc = sel_make_dir(class_dir->d_inode, class_name_dir, |
| 1572 | &last_class_ino); |
| 1573 | if (rc) |
| 1574 | goto out1; |
| 1575 | |
| 1576 | /* i+1 since class values are 1-indexed */ |
| 1577 | rc = sel_make_class_dir_entries(classes[i], i+1, |
| 1578 | class_name_dir); |
| 1579 | if (rc) |
| 1580 | goto out1; |
| 1581 | } |
| 1582 | |
| 1583 | out1: |
| 1584 | for (i = 0; i < nclasses; i++) |
| 1585 | kfree(classes[i]); |
| 1586 | kfree(classes); |
| 1587 | out: |
| 1588 | return rc; |
| 1589 | } |
| 1590 | |
Paul Moore | 3bb56b2 | 2008-01-29 08:38:19 -0500 | [diff] [blame] | 1591 | static int sel_make_policycap(void) |
| 1592 | { |
| 1593 | unsigned int iter; |
| 1594 | struct dentry *dentry = NULL; |
| 1595 | struct inode *inode = NULL; |
| 1596 | |
| 1597 | sel_remove_entries(policycap_dir); |
| 1598 | |
| 1599 | for (iter = 0; iter <= POLICYDB_CAPABILITY_MAX; iter++) { |
| 1600 | if (iter < ARRAY_SIZE(policycap_names)) |
| 1601 | dentry = d_alloc_name(policycap_dir, |
| 1602 | policycap_names[iter]); |
| 1603 | else |
| 1604 | dentry = d_alloc_name(policycap_dir, "unknown"); |
| 1605 | |
| 1606 | if (dentry == NULL) |
| 1607 | return -ENOMEM; |
| 1608 | |
| 1609 | inode = sel_make_inode(policycap_dir->d_sb, S_IFREG | S_IRUGO); |
| 1610 | if (inode == NULL) |
| 1611 | return -ENOMEM; |
| 1612 | |
| 1613 | inode->i_fop = &sel_policycap_ops; |
| 1614 | inode->i_ino = iter | SEL_POLICYCAP_INO_OFFSET; |
| 1615 | d_add(dentry, inode); |
| 1616 | } |
| 1617 | |
| 1618 | return 0; |
| 1619 | } |
| 1620 | |
Christopher J. PeBenito | 0dd4ae5 | 2007-05-23 09:12:08 -0400 | [diff] [blame] | 1621 | static int sel_make_dir(struct inode *dir, struct dentry *dentry, |
| 1622 | unsigned long *ino) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1623 | { |
| 1624 | int ret = 0; |
| 1625 | struct inode *inode; |
| 1626 | |
James Morris | edb20fb | 2006-03-22 00:09:20 -0800 | [diff] [blame] | 1627 | inode = sel_make_inode(dir->i_sb, S_IFDIR | S_IRUGO | S_IXUGO); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1628 | if (!inode) { |
| 1629 | ret = -ENOMEM; |
| 1630 | goto out; |
| 1631 | } |
| 1632 | inode->i_op = &simple_dir_inode_operations; |
| 1633 | inode->i_fop = &simple_dir_operations; |
Christopher J. PeBenito | 0dd4ae5 | 2007-05-23 09:12:08 -0400 | [diff] [blame] | 1634 | inode->i_ino = ++(*ino); |
James Morris | 40e906f | 2006-03-22 00:09:16 -0800 | [diff] [blame] | 1635 | /* directory inodes start off with i_nlink == 2 (for "." entry) */ |
Dave Hansen | d8c76e6 | 2006-09-30 23:29:04 -0700 | [diff] [blame] | 1636 | inc_nlink(inode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1637 | d_add(dentry, inode); |
James Morris | edb20fb | 2006-03-22 00:09:20 -0800 | [diff] [blame] | 1638 | /* bump link count on parent directory, too */ |
Dave Hansen | d8c76e6 | 2006-09-30 23:29:04 -0700 | [diff] [blame] | 1639 | inc_nlink(dir); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1640 | out: |
| 1641 | return ret; |
| 1642 | } |
| 1643 | |
| 1644 | static int sel_fill_super(struct super_block * sb, void * data, int silent) |
| 1645 | { |
| 1646 | int ret; |
| 1647 | struct dentry *dentry; |
James Morris | edb20fb | 2006-03-22 00:09:20 -0800 | [diff] [blame] | 1648 | struct inode *inode, *root_inode; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1649 | struct inode_security_struct *isec; |
| 1650 | |
| 1651 | static struct tree_descr selinux_files[] = { |
| 1652 | [SEL_LOAD] = {"load", &sel_load_ops, S_IRUSR|S_IWUSR}, |
| 1653 | [SEL_ENFORCE] = {"enforce", &sel_enforce_ops, S_IRUGO|S_IWUSR}, |
Stephen Smalley | ce9982d | 2005-11-08 21:34:33 -0800 | [diff] [blame] | 1654 | [SEL_CONTEXT] = {"context", &transaction_ops, S_IRUGO|S_IWUGO}, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1655 | [SEL_ACCESS] = {"access", &transaction_ops, S_IRUGO|S_IWUGO}, |
| 1656 | [SEL_CREATE] = {"create", &transaction_ops, S_IRUGO|S_IWUGO}, |
| 1657 | [SEL_RELABEL] = {"relabel", &transaction_ops, S_IRUGO|S_IWUGO}, |
| 1658 | [SEL_USER] = {"user", &transaction_ops, S_IRUGO|S_IWUGO}, |
| 1659 | [SEL_POLICYVERS] = {"policyvers", &sel_policyvers_ops, S_IRUGO}, |
| 1660 | [SEL_COMMIT_BOOLS] = {"commit_pending_bools", &sel_commit_bools_ops, S_IWUSR}, |
| 1661 | [SEL_MLS] = {"mls", &sel_mls_ops, S_IRUGO}, |
| 1662 | [SEL_DISABLE] = {"disable", &sel_disable_ops, S_IWUSR}, |
| 1663 | [SEL_MEMBER] = {"member", &transaction_ops, S_IRUGO|S_IWUGO}, |
| 1664 | [SEL_CHECKREQPROT] = {"checkreqprot", &sel_checkreqprot_ops, S_IRUGO|S_IWUSR}, |
James Morris | 4e5ab4c | 2006-06-09 00:33:33 -0700 | [diff] [blame] | 1665 | [SEL_COMPAT_NET] = {"compat_net", &sel_compat_net_ops, S_IRUGO|S_IWUSR}, |
Eric Paris | 3f12070 | 2007-09-21 14:37:10 -0400 | [diff] [blame] | 1666 | [SEL_REJECT_UNKNOWN] = {"reject_unknown", &sel_handle_unknown_ops, S_IRUGO}, |
| 1667 | [SEL_DENY_UNKNOWN] = {"deny_unknown", &sel_handle_unknown_ops, S_IRUGO}, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1668 | /* last one */ {""} |
| 1669 | }; |
| 1670 | ret = simple_fill_super(sb, SELINUX_MAGIC, selinux_files); |
| 1671 | if (ret) |
James Morris | 161ce45 | 2006-03-22 00:09:17 -0800 | [diff] [blame] | 1672 | goto err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1673 | |
James Morris | edb20fb | 2006-03-22 00:09:20 -0800 | [diff] [blame] | 1674 | root_inode = sb->s_root->d_inode; |
| 1675 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1676 | dentry = d_alloc_name(sb->s_root, BOOL_DIR_NAME); |
James Morris | 161ce45 | 2006-03-22 00:09:17 -0800 | [diff] [blame] | 1677 | if (!dentry) { |
| 1678 | ret = -ENOMEM; |
| 1679 | goto err; |
| 1680 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1681 | |
Christopher J. PeBenito | 0dd4ae5 | 2007-05-23 09:12:08 -0400 | [diff] [blame] | 1682 | ret = sel_make_dir(root_inode, dentry, &sel_last_ino); |
James Morris | cde174a | 2006-03-22 00:09:17 -0800 | [diff] [blame] | 1683 | if (ret) |
James Morris | 161ce45 | 2006-03-22 00:09:17 -0800 | [diff] [blame] | 1684 | goto err; |
James Morris | cde174a | 2006-03-22 00:09:17 -0800 | [diff] [blame] | 1685 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1686 | bool_dir = dentry; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1687 | |
| 1688 | dentry = d_alloc_name(sb->s_root, NULL_FILE_NAME); |
James Morris | 161ce45 | 2006-03-22 00:09:17 -0800 | [diff] [blame] | 1689 | if (!dentry) { |
| 1690 | ret = -ENOMEM; |
| 1691 | goto err; |
| 1692 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1693 | |
| 1694 | inode = sel_make_inode(sb, S_IFCHR | S_IRUGO | S_IWUGO); |
James Morris | 161ce45 | 2006-03-22 00:09:17 -0800 | [diff] [blame] | 1695 | if (!inode) { |
| 1696 | ret = -ENOMEM; |
| 1697 | goto err; |
| 1698 | } |
James Carter | 6174eaf | 2007-04-04 16:18:39 -0400 | [diff] [blame] | 1699 | inode->i_ino = ++sel_last_ino; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1700 | isec = (struct inode_security_struct*)inode->i_security; |
| 1701 | isec->sid = SECINITSID_DEVNULL; |
| 1702 | isec->sclass = SECCLASS_CHR_FILE; |
| 1703 | isec->initialized = 1; |
| 1704 | |
| 1705 | init_special_inode(inode, S_IFCHR | S_IRUGO | S_IWUGO, MKDEV(MEM_MAJOR, 3)); |
| 1706 | d_add(dentry, inode); |
| 1707 | selinux_null = dentry; |
| 1708 | |
| 1709 | dentry = d_alloc_name(sb->s_root, "avc"); |
James Morris | 161ce45 | 2006-03-22 00:09:17 -0800 | [diff] [blame] | 1710 | if (!dentry) { |
| 1711 | ret = -ENOMEM; |
| 1712 | goto err; |
| 1713 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1714 | |
Christopher J. PeBenito | 0dd4ae5 | 2007-05-23 09:12:08 -0400 | [diff] [blame] | 1715 | ret = sel_make_dir(root_inode, dentry, &sel_last_ino); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1716 | if (ret) |
James Morris | 161ce45 | 2006-03-22 00:09:17 -0800 | [diff] [blame] | 1717 | goto err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1718 | |
| 1719 | ret = sel_make_avc_files(dentry); |
| 1720 | if (ret) |
James Morris | 161ce45 | 2006-03-22 00:09:17 -0800 | [diff] [blame] | 1721 | goto err; |
James Carter | f0ee2e4 | 2007-04-04 10:11:29 -0400 | [diff] [blame] | 1722 | |
| 1723 | dentry = d_alloc_name(sb->s_root, "initial_contexts"); |
| 1724 | if (!dentry) { |
| 1725 | ret = -ENOMEM; |
| 1726 | goto err; |
| 1727 | } |
| 1728 | |
Christopher J. PeBenito | 0dd4ae5 | 2007-05-23 09:12:08 -0400 | [diff] [blame] | 1729 | ret = sel_make_dir(root_inode, dentry, &sel_last_ino); |
James Carter | f0ee2e4 | 2007-04-04 10:11:29 -0400 | [diff] [blame] | 1730 | if (ret) |
| 1731 | goto err; |
| 1732 | |
| 1733 | ret = sel_make_initcon_files(dentry); |
| 1734 | if (ret) |
| 1735 | goto err; |
| 1736 | |
Christopher J. PeBenito | e47c8fc | 2007-05-23 09:12:09 -0400 | [diff] [blame] | 1737 | dentry = d_alloc_name(sb->s_root, "class"); |
| 1738 | if (!dentry) { |
| 1739 | ret = -ENOMEM; |
| 1740 | goto err; |
| 1741 | } |
| 1742 | |
| 1743 | ret = sel_make_dir(root_inode, dentry, &sel_last_ino); |
| 1744 | if (ret) |
| 1745 | goto err; |
| 1746 | |
| 1747 | class_dir = dentry; |
| 1748 | |
Paul Moore | 3bb56b2 | 2008-01-29 08:38:19 -0500 | [diff] [blame] | 1749 | dentry = d_alloc_name(sb->s_root, "policy_capabilities"); |
| 1750 | if (!dentry) { |
| 1751 | ret = -ENOMEM; |
| 1752 | goto err; |
| 1753 | } |
| 1754 | |
| 1755 | ret = sel_make_dir(root_inode, dentry, &sel_last_ino); |
| 1756 | if (ret) |
| 1757 | goto err; |
| 1758 | |
| 1759 | policycap_dir = dentry; |
| 1760 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1761 | out: |
James Morris | 161ce45 | 2006-03-22 00:09:17 -0800 | [diff] [blame] | 1762 | return ret; |
| 1763 | err: |
Eric Paris | 744ba35 | 2008-04-17 11:52:44 -0400 | [diff] [blame^] | 1764 | printk(KERN_ERR "SELinux: %s: failed while creating inodes\n", |
| 1765 | __func__); |
James Morris | 161ce45 | 2006-03-22 00:09:17 -0800 | [diff] [blame] | 1766 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1767 | } |
| 1768 | |
David Howells | 454e239 | 2006-06-23 02:02:57 -0700 | [diff] [blame] | 1769 | static int sel_get_sb(struct file_system_type *fs_type, |
| 1770 | int flags, const char *dev_name, void *data, |
| 1771 | struct vfsmount *mnt) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1772 | { |
David Howells | 454e239 | 2006-06-23 02:02:57 -0700 | [diff] [blame] | 1773 | return get_sb_single(fs_type, flags, data, sel_fill_super, mnt); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1774 | } |
| 1775 | |
| 1776 | static struct file_system_type sel_fs_type = { |
| 1777 | .name = "selinuxfs", |
| 1778 | .get_sb = sel_get_sb, |
| 1779 | .kill_sb = kill_litter_super, |
| 1780 | }; |
| 1781 | |
| 1782 | struct vfsmount *selinuxfs_mount; |
| 1783 | |
| 1784 | static int __init init_sel_fs(void) |
| 1785 | { |
| 1786 | int err; |
| 1787 | |
| 1788 | if (!selinux_enabled) |
| 1789 | return 0; |
| 1790 | err = register_filesystem(&sel_fs_type); |
| 1791 | if (!err) { |
| 1792 | selinuxfs_mount = kern_mount(&sel_fs_type); |
| 1793 | if (IS_ERR(selinuxfs_mount)) { |
| 1794 | printk(KERN_ERR "selinuxfs: could not mount!\n"); |
| 1795 | err = PTR_ERR(selinuxfs_mount); |
| 1796 | selinuxfs_mount = NULL; |
| 1797 | } |
| 1798 | } |
| 1799 | return err; |
| 1800 | } |
| 1801 | |
| 1802 | __initcall(init_sel_fs); |
| 1803 | |
| 1804 | #ifdef CONFIG_SECURITY_SELINUX_DISABLE |
| 1805 | void exit_sel_fs(void) |
| 1806 | { |
| 1807 | unregister_filesystem(&sel_fs_type); |
| 1808 | } |
| 1809 | #endif |