11da177e4SLinus Torvalds /* Updated: Karl MacMillan <kmacmillan@tresys.com> 21da177e4SLinus Torvalds * 31da177e4SLinus Torvalds * Added conditional policy language extensions 41da177e4SLinus Torvalds * 51da177e4SLinus Torvalds * Copyright (C) 2003 - 2004 Tresys Technology, LLC 61da177e4SLinus Torvalds * Copyright (C) 2004 Red Hat, Inc., James Morris <jmorris@redhat.com> 71da177e4SLinus Torvalds * This program is free software; you can redistribute it and/or modify 81da177e4SLinus Torvalds * it under the terms of the GNU General Public License as published by 91da177e4SLinus Torvalds * the Free Software Foundation, version 2. 101da177e4SLinus Torvalds */ 111da177e4SLinus Torvalds 121da177e4SLinus Torvalds #include <linux/config.h> 131da177e4SLinus Torvalds #include <linux/kernel.h> 141da177e4SLinus Torvalds #include <linux/pagemap.h> 151da177e4SLinus Torvalds #include <linux/slab.h> 161da177e4SLinus Torvalds #include <linux/vmalloc.h> 171da177e4SLinus Torvalds #include <linux/fs.h> 18bb003079SIngo Molnar #include <linux/mutex.h> 191da177e4SLinus Torvalds #include <linux/init.h> 201da177e4SLinus Torvalds #include <linux/string.h> 211da177e4SLinus Torvalds #include <linux/security.h> 221da177e4SLinus Torvalds #include <linux/major.h> 231da177e4SLinus Torvalds #include <linux/seq_file.h> 241da177e4SLinus Torvalds #include <linux/percpu.h> 251da177e4SLinus Torvalds #include <asm/uaccess.h> 261da177e4SLinus Torvalds #include <asm/semaphore.h> 271da177e4SLinus Torvalds 281da177e4SLinus Torvalds /* selinuxfs pseudo filesystem for exporting the security policy API. 291da177e4SLinus Torvalds Based on the proc code and the fs/nfsd/nfsctl.c code. */ 301da177e4SLinus Torvalds 311da177e4SLinus Torvalds #include "flask.h" 321da177e4SLinus Torvalds #include "avc.h" 331da177e4SLinus Torvalds #include "avc_ss.h" 341da177e4SLinus Torvalds #include "security.h" 351da177e4SLinus Torvalds #include "objsec.h" 361da177e4SLinus Torvalds #include "conditional.h" 371da177e4SLinus Torvalds 381da177e4SLinus Torvalds unsigned int selinux_checkreqprot = CONFIG_SECURITY_SELINUX_CHECKREQPROT_VALUE; 391da177e4SLinus Torvalds 401da177e4SLinus Torvalds static int __init checkreqprot_setup(char *str) 411da177e4SLinus Torvalds { 421da177e4SLinus Torvalds selinux_checkreqprot = simple_strtoul(str,NULL,0) ? 1 : 0; 431da177e4SLinus Torvalds return 1; 441da177e4SLinus Torvalds } 451da177e4SLinus Torvalds __setup("checkreqprot=", checkreqprot_setup); 461da177e4SLinus Torvalds 471da177e4SLinus Torvalds 48bb003079SIngo Molnar static DEFINE_MUTEX(sel_mutex); 491da177e4SLinus Torvalds 501da177e4SLinus Torvalds /* global data for booleans */ 511da177e4SLinus Torvalds static struct dentry *bool_dir = NULL; 521da177e4SLinus Torvalds static int bool_num = 0; 531da177e4SLinus Torvalds static int *bool_pending_values = NULL; 541da177e4SLinus Torvalds 551da177e4SLinus Torvalds extern void selnl_notify_setenforce(int val); 561da177e4SLinus Torvalds 571da177e4SLinus Torvalds /* Check whether a task is allowed to use a security operation. */ 581da177e4SLinus Torvalds static int task_has_security(struct task_struct *tsk, 591da177e4SLinus Torvalds u32 perms) 601da177e4SLinus Torvalds { 611da177e4SLinus Torvalds struct task_security_struct *tsec; 621da177e4SLinus Torvalds 631da177e4SLinus Torvalds tsec = tsk->security; 641da177e4SLinus Torvalds if (!tsec) 651da177e4SLinus Torvalds return -EACCES; 661da177e4SLinus Torvalds 671da177e4SLinus Torvalds return avc_has_perm(tsec->sid, SECINITSID_SECURITY, 681da177e4SLinus Torvalds SECCLASS_SECURITY, perms, NULL); 691da177e4SLinus Torvalds } 701da177e4SLinus Torvalds 711da177e4SLinus Torvalds enum sel_inos { 721da177e4SLinus Torvalds SEL_ROOT_INO = 2, 731da177e4SLinus Torvalds SEL_LOAD, /* load policy */ 741da177e4SLinus Torvalds SEL_ENFORCE, /* get or set enforcing status */ 751da177e4SLinus Torvalds SEL_CONTEXT, /* validate context */ 761da177e4SLinus Torvalds SEL_ACCESS, /* compute access decision */ 771da177e4SLinus Torvalds SEL_CREATE, /* compute create labeling decision */ 781da177e4SLinus Torvalds SEL_RELABEL, /* compute relabeling decision */ 791da177e4SLinus Torvalds SEL_USER, /* compute reachable user contexts */ 801da177e4SLinus Torvalds SEL_POLICYVERS, /* return policy version for this kernel */ 811da177e4SLinus Torvalds SEL_COMMIT_BOOLS, /* commit new boolean values */ 821da177e4SLinus Torvalds SEL_MLS, /* return if MLS policy is enabled */ 831da177e4SLinus Torvalds SEL_DISABLE, /* disable SELinux until next reboot */ 841da177e4SLinus Torvalds SEL_AVC, /* AVC management directory */ 851da177e4SLinus Torvalds SEL_MEMBER, /* compute polyinstantiation membership decision */ 861da177e4SLinus Torvalds SEL_CHECKREQPROT, /* check requested protection, not kernel-applied one */ 871da177e4SLinus Torvalds }; 881da177e4SLinus Torvalds 891da177e4SLinus Torvalds #define TMPBUFLEN 12 901da177e4SLinus Torvalds static ssize_t sel_read_enforce(struct file *filp, char __user *buf, 911da177e4SLinus Torvalds size_t count, loff_t *ppos) 921da177e4SLinus Torvalds { 931da177e4SLinus Torvalds char tmpbuf[TMPBUFLEN]; 941da177e4SLinus Torvalds ssize_t length; 951da177e4SLinus Torvalds 961da177e4SLinus Torvalds length = scnprintf(tmpbuf, TMPBUFLEN, "%d", selinux_enforcing); 971da177e4SLinus Torvalds return simple_read_from_buffer(buf, count, ppos, tmpbuf, length); 981da177e4SLinus Torvalds } 991da177e4SLinus Torvalds 1001da177e4SLinus Torvalds #ifdef CONFIG_SECURITY_SELINUX_DEVELOP 1011da177e4SLinus Torvalds static ssize_t sel_write_enforce(struct file * file, const char __user * buf, 1021da177e4SLinus Torvalds size_t count, loff_t *ppos) 1031da177e4SLinus Torvalds 1041da177e4SLinus Torvalds { 1051da177e4SLinus Torvalds char *page; 1061da177e4SLinus Torvalds ssize_t length; 1071da177e4SLinus Torvalds int new_value; 1081da177e4SLinus Torvalds 109bfd51626SDavi Arnaut if (count >= PAGE_SIZE) 1101da177e4SLinus Torvalds return -ENOMEM; 1111da177e4SLinus Torvalds if (*ppos != 0) { 1121da177e4SLinus Torvalds /* No partial writes. */ 1131da177e4SLinus Torvalds return -EINVAL; 1141da177e4SLinus Torvalds } 1151da177e4SLinus Torvalds page = (char*)get_zeroed_page(GFP_KERNEL); 1161da177e4SLinus Torvalds if (!page) 1171da177e4SLinus Torvalds return -ENOMEM; 1181da177e4SLinus Torvalds length = -EFAULT; 1191da177e4SLinus Torvalds if (copy_from_user(page, buf, count)) 1201da177e4SLinus Torvalds goto out; 1211da177e4SLinus Torvalds 1221da177e4SLinus Torvalds length = -EINVAL; 1231da177e4SLinus Torvalds if (sscanf(page, "%d", &new_value) != 1) 1241da177e4SLinus Torvalds goto out; 1251da177e4SLinus Torvalds 1261da177e4SLinus Torvalds if (new_value != selinux_enforcing) { 1271da177e4SLinus Torvalds length = task_has_security(current, SECURITY__SETENFORCE); 1281da177e4SLinus Torvalds if (length) 1291da177e4SLinus Torvalds goto out; 1301da177e4SLinus Torvalds selinux_enforcing = new_value; 1311da177e4SLinus Torvalds if (selinux_enforcing) 1321da177e4SLinus Torvalds avc_ss_reset(0); 1331da177e4SLinus Torvalds selnl_notify_setenforce(selinux_enforcing); 1341da177e4SLinus Torvalds } 1351da177e4SLinus Torvalds length = count; 1361da177e4SLinus Torvalds out: 1371da177e4SLinus Torvalds free_page((unsigned long) page); 1381da177e4SLinus Torvalds return length; 1391da177e4SLinus Torvalds } 1401da177e4SLinus Torvalds #else 1411da177e4SLinus Torvalds #define sel_write_enforce NULL 1421da177e4SLinus Torvalds #endif 1431da177e4SLinus Torvalds 1441da177e4SLinus Torvalds static struct file_operations sel_enforce_ops = { 1451da177e4SLinus Torvalds .read = sel_read_enforce, 1461da177e4SLinus Torvalds .write = sel_write_enforce, 1471da177e4SLinus Torvalds }; 1481da177e4SLinus Torvalds 1491da177e4SLinus Torvalds #ifdef CONFIG_SECURITY_SELINUX_DISABLE 1501da177e4SLinus Torvalds static ssize_t sel_write_disable(struct file * file, const char __user * buf, 1511da177e4SLinus Torvalds size_t count, loff_t *ppos) 1521da177e4SLinus Torvalds 1531da177e4SLinus Torvalds { 1541da177e4SLinus Torvalds char *page; 1551da177e4SLinus Torvalds ssize_t length; 1561da177e4SLinus Torvalds int new_value; 1571da177e4SLinus Torvalds extern int selinux_disable(void); 1581da177e4SLinus Torvalds 159bfd51626SDavi Arnaut if (count >= PAGE_SIZE) 1601da177e4SLinus Torvalds return -ENOMEM; 1611da177e4SLinus Torvalds if (*ppos != 0) { 1621da177e4SLinus Torvalds /* No partial writes. */ 1631da177e4SLinus Torvalds return -EINVAL; 1641da177e4SLinus Torvalds } 1651da177e4SLinus Torvalds page = (char*)get_zeroed_page(GFP_KERNEL); 1661da177e4SLinus Torvalds if (!page) 1671da177e4SLinus Torvalds return -ENOMEM; 1681da177e4SLinus Torvalds length = -EFAULT; 1691da177e4SLinus Torvalds if (copy_from_user(page, buf, count)) 1701da177e4SLinus Torvalds goto out; 1711da177e4SLinus Torvalds 1721da177e4SLinus Torvalds length = -EINVAL; 1731da177e4SLinus Torvalds if (sscanf(page, "%d", &new_value) != 1) 1741da177e4SLinus Torvalds goto out; 1751da177e4SLinus Torvalds 1761da177e4SLinus Torvalds if (new_value) { 1771da177e4SLinus Torvalds length = selinux_disable(); 1781da177e4SLinus Torvalds if (length < 0) 1791da177e4SLinus Torvalds goto out; 1801da177e4SLinus Torvalds } 1811da177e4SLinus Torvalds 1821da177e4SLinus Torvalds length = count; 1831da177e4SLinus Torvalds out: 1841da177e4SLinus Torvalds free_page((unsigned long) page); 1851da177e4SLinus Torvalds return length; 1861da177e4SLinus Torvalds } 1871da177e4SLinus Torvalds #else 1881da177e4SLinus Torvalds #define sel_write_disable NULL 1891da177e4SLinus Torvalds #endif 1901da177e4SLinus Torvalds 1911da177e4SLinus Torvalds static struct file_operations sel_disable_ops = { 1921da177e4SLinus Torvalds .write = sel_write_disable, 1931da177e4SLinus Torvalds }; 1941da177e4SLinus Torvalds 1951da177e4SLinus Torvalds static ssize_t sel_read_policyvers(struct file *filp, char __user *buf, 1961da177e4SLinus Torvalds size_t count, loff_t *ppos) 1971da177e4SLinus Torvalds { 1981da177e4SLinus Torvalds char tmpbuf[TMPBUFLEN]; 1991da177e4SLinus Torvalds ssize_t length; 2001da177e4SLinus Torvalds 2011da177e4SLinus Torvalds length = scnprintf(tmpbuf, TMPBUFLEN, "%u", POLICYDB_VERSION_MAX); 2021da177e4SLinus Torvalds return simple_read_from_buffer(buf, count, ppos, tmpbuf, length); 2031da177e4SLinus Torvalds } 2041da177e4SLinus Torvalds 2051da177e4SLinus Torvalds static struct file_operations sel_policyvers_ops = { 2061da177e4SLinus Torvalds .read = sel_read_policyvers, 2071da177e4SLinus Torvalds }; 2081da177e4SLinus Torvalds 2091da177e4SLinus Torvalds /* declaration for sel_write_load */ 2101da177e4SLinus Torvalds static int sel_make_bools(void); 2111da177e4SLinus Torvalds 2121da177e4SLinus Torvalds static ssize_t sel_read_mls(struct file *filp, char __user *buf, 2131da177e4SLinus Torvalds size_t count, loff_t *ppos) 2141da177e4SLinus Torvalds { 2151da177e4SLinus Torvalds char tmpbuf[TMPBUFLEN]; 2161da177e4SLinus Torvalds ssize_t length; 2171da177e4SLinus Torvalds 2181da177e4SLinus Torvalds length = scnprintf(tmpbuf, TMPBUFLEN, "%d", selinux_mls_enabled); 2191da177e4SLinus Torvalds return simple_read_from_buffer(buf, count, ppos, tmpbuf, length); 2201da177e4SLinus Torvalds } 2211da177e4SLinus Torvalds 2221da177e4SLinus Torvalds static struct file_operations sel_mls_ops = { 2231da177e4SLinus Torvalds .read = sel_read_mls, 2241da177e4SLinus Torvalds }; 2251da177e4SLinus Torvalds 2261da177e4SLinus Torvalds static ssize_t sel_write_load(struct file * file, const char __user * buf, 2271da177e4SLinus Torvalds size_t count, loff_t *ppos) 2281da177e4SLinus Torvalds 2291da177e4SLinus Torvalds { 2301da177e4SLinus Torvalds int ret; 2311da177e4SLinus Torvalds ssize_t length; 2321da177e4SLinus Torvalds void *data = NULL; 2331da177e4SLinus Torvalds 234bb003079SIngo Molnar mutex_lock(&sel_mutex); 2351da177e4SLinus Torvalds 2361da177e4SLinus Torvalds length = task_has_security(current, SECURITY__LOAD_POLICY); 2371da177e4SLinus Torvalds if (length) 2381da177e4SLinus Torvalds goto out; 2391da177e4SLinus Torvalds 2401da177e4SLinus Torvalds if (*ppos != 0) { 2411da177e4SLinus Torvalds /* No partial writes. */ 2421da177e4SLinus Torvalds length = -EINVAL; 2431da177e4SLinus Torvalds goto out; 2441da177e4SLinus Torvalds } 2451da177e4SLinus Torvalds 246bfd51626SDavi Arnaut if ((count > 64 * 1024 * 1024) 2471da177e4SLinus Torvalds || (data = vmalloc(count)) == NULL) { 2481da177e4SLinus Torvalds length = -ENOMEM; 2491da177e4SLinus Torvalds goto out; 2501da177e4SLinus Torvalds } 2511da177e4SLinus Torvalds 2521da177e4SLinus Torvalds length = -EFAULT; 2531da177e4SLinus Torvalds if (copy_from_user(data, buf, count) != 0) 2541da177e4SLinus Torvalds goto out; 2551da177e4SLinus Torvalds 2561da177e4SLinus Torvalds length = security_load_policy(data, count); 2571da177e4SLinus Torvalds if (length) 2581da177e4SLinus Torvalds goto out; 2591da177e4SLinus Torvalds 2601da177e4SLinus Torvalds ret = sel_make_bools(); 2611da177e4SLinus Torvalds if (ret) 2621da177e4SLinus Torvalds length = ret; 2631da177e4SLinus Torvalds else 2641da177e4SLinus Torvalds length = count; 2651da177e4SLinus Torvalds out: 266bb003079SIngo Molnar mutex_unlock(&sel_mutex); 2671da177e4SLinus Torvalds vfree(data); 2681da177e4SLinus Torvalds return length; 2691da177e4SLinus Torvalds } 2701da177e4SLinus Torvalds 2711da177e4SLinus Torvalds static struct file_operations sel_load_ops = { 2721da177e4SLinus Torvalds .write = sel_write_load, 2731da177e4SLinus Torvalds }; 2741da177e4SLinus Torvalds 275ce9982d0SStephen Smalley static ssize_t sel_write_context(struct file * file, char *buf, size_t size) 2761da177e4SLinus Torvalds { 277ce9982d0SStephen Smalley char *canon; 278ce9982d0SStephen Smalley u32 sid, len; 2791da177e4SLinus Torvalds ssize_t length; 2801da177e4SLinus Torvalds 2811da177e4SLinus Torvalds length = task_has_security(current, SECURITY__CHECK_CONTEXT); 2821da177e4SLinus Torvalds if (length) 2831da177e4SLinus Torvalds return length; 2841da177e4SLinus Torvalds 285ce9982d0SStephen Smalley length = security_context_to_sid(buf, size, &sid); 2861da177e4SLinus Torvalds if (length < 0) 287ce9982d0SStephen Smalley return length; 2881da177e4SLinus Torvalds 289ce9982d0SStephen Smalley length = security_sid_to_context(sid, &canon, &len); 290ce9982d0SStephen Smalley if (length < 0) 291ce9982d0SStephen Smalley return length; 292ce9982d0SStephen Smalley 293ce9982d0SStephen Smalley if (len > SIMPLE_TRANSACTION_LIMIT) { 294ce9982d0SStephen Smalley printk(KERN_ERR "%s: context size (%u) exceeds payload " 295ce9982d0SStephen Smalley "max\n", __FUNCTION__, len); 296ce9982d0SStephen Smalley length = -ERANGE; 297ce9982d0SStephen Smalley goto out; 298ce9982d0SStephen Smalley } 299ce9982d0SStephen Smalley 300ce9982d0SStephen Smalley memcpy(buf, canon, len); 301ce9982d0SStephen Smalley length = len; 3021da177e4SLinus Torvalds out: 303ce9982d0SStephen Smalley kfree(canon); 3041da177e4SLinus Torvalds return length; 3051da177e4SLinus Torvalds } 3061da177e4SLinus Torvalds 3071da177e4SLinus Torvalds static ssize_t sel_read_checkreqprot(struct file *filp, char __user *buf, 3081da177e4SLinus Torvalds size_t count, loff_t *ppos) 3091da177e4SLinus Torvalds { 3101da177e4SLinus Torvalds char tmpbuf[TMPBUFLEN]; 3111da177e4SLinus Torvalds ssize_t length; 3121da177e4SLinus Torvalds 3131da177e4SLinus Torvalds length = scnprintf(tmpbuf, TMPBUFLEN, "%u", selinux_checkreqprot); 3141da177e4SLinus Torvalds return simple_read_from_buffer(buf, count, ppos, tmpbuf, length); 3151da177e4SLinus Torvalds } 3161da177e4SLinus Torvalds 3171da177e4SLinus Torvalds static ssize_t sel_write_checkreqprot(struct file * file, const char __user * buf, 3181da177e4SLinus Torvalds size_t count, loff_t *ppos) 3191da177e4SLinus Torvalds { 3201da177e4SLinus Torvalds char *page; 3211da177e4SLinus Torvalds ssize_t length; 3221da177e4SLinus Torvalds unsigned int new_value; 3231da177e4SLinus Torvalds 3241da177e4SLinus Torvalds length = task_has_security(current, SECURITY__SETCHECKREQPROT); 3251da177e4SLinus Torvalds if (length) 3261da177e4SLinus Torvalds return length; 3271da177e4SLinus Torvalds 328bfd51626SDavi Arnaut if (count >= PAGE_SIZE) 3291da177e4SLinus Torvalds return -ENOMEM; 3301da177e4SLinus Torvalds if (*ppos != 0) { 3311da177e4SLinus Torvalds /* No partial writes. */ 3321da177e4SLinus Torvalds return -EINVAL; 3331da177e4SLinus Torvalds } 3341da177e4SLinus Torvalds page = (char*)get_zeroed_page(GFP_KERNEL); 3351da177e4SLinus Torvalds if (!page) 3361da177e4SLinus Torvalds return -ENOMEM; 3371da177e4SLinus Torvalds length = -EFAULT; 3381da177e4SLinus Torvalds if (copy_from_user(page, buf, count)) 3391da177e4SLinus Torvalds goto out; 3401da177e4SLinus Torvalds 3411da177e4SLinus Torvalds length = -EINVAL; 3421da177e4SLinus Torvalds if (sscanf(page, "%u", &new_value) != 1) 3431da177e4SLinus Torvalds goto out; 3441da177e4SLinus Torvalds 3451da177e4SLinus Torvalds selinux_checkreqprot = new_value ? 1 : 0; 3461da177e4SLinus Torvalds length = count; 3471da177e4SLinus Torvalds out: 3481da177e4SLinus Torvalds free_page((unsigned long) page); 3491da177e4SLinus Torvalds return length; 3501da177e4SLinus Torvalds } 3511da177e4SLinus Torvalds static struct file_operations sel_checkreqprot_ops = { 3521da177e4SLinus Torvalds .read = sel_read_checkreqprot, 3531da177e4SLinus Torvalds .write = sel_write_checkreqprot, 3541da177e4SLinus Torvalds }; 3551da177e4SLinus Torvalds 3561da177e4SLinus Torvalds /* 3571da177e4SLinus Torvalds * Remaining nodes use transaction based IO methods like nfsd/nfsctl.c 3581da177e4SLinus Torvalds */ 3591da177e4SLinus Torvalds static ssize_t sel_write_access(struct file * file, char *buf, size_t size); 3601da177e4SLinus Torvalds static ssize_t sel_write_create(struct file * file, char *buf, size_t size); 3611da177e4SLinus Torvalds static ssize_t sel_write_relabel(struct file * file, char *buf, size_t size); 3621da177e4SLinus Torvalds static ssize_t sel_write_user(struct file * file, char *buf, size_t size); 3631da177e4SLinus Torvalds static ssize_t sel_write_member(struct file * file, char *buf, size_t size); 3641da177e4SLinus Torvalds 3651da177e4SLinus Torvalds static ssize_t (*write_op[])(struct file *, char *, size_t) = { 3661da177e4SLinus Torvalds [SEL_ACCESS] = sel_write_access, 3671da177e4SLinus Torvalds [SEL_CREATE] = sel_write_create, 3681da177e4SLinus Torvalds [SEL_RELABEL] = sel_write_relabel, 3691da177e4SLinus Torvalds [SEL_USER] = sel_write_user, 3701da177e4SLinus Torvalds [SEL_MEMBER] = sel_write_member, 371ce9982d0SStephen Smalley [SEL_CONTEXT] = sel_write_context, 3721da177e4SLinus Torvalds }; 3731da177e4SLinus Torvalds 3741da177e4SLinus Torvalds static ssize_t selinux_transaction_write(struct file *file, const char __user *buf, size_t size, loff_t *pos) 3751da177e4SLinus Torvalds { 3761da177e4SLinus Torvalds ino_t ino = file->f_dentry->d_inode->i_ino; 3771da177e4SLinus Torvalds char *data; 3781da177e4SLinus Torvalds ssize_t rv; 3791da177e4SLinus Torvalds 3806e20a64aSNicolas Kaiser if (ino >= ARRAY_SIZE(write_op) || !write_op[ino]) 3811da177e4SLinus Torvalds return -EINVAL; 3821da177e4SLinus Torvalds 3831da177e4SLinus Torvalds data = simple_transaction_get(file, buf, size); 3841da177e4SLinus Torvalds if (IS_ERR(data)) 3851da177e4SLinus Torvalds return PTR_ERR(data); 3861da177e4SLinus Torvalds 3871da177e4SLinus Torvalds rv = write_op[ino](file, data, size); 3881da177e4SLinus Torvalds if (rv>0) { 3891da177e4SLinus Torvalds simple_transaction_set(file, rv); 3901da177e4SLinus Torvalds rv = size; 3911da177e4SLinus Torvalds } 3921da177e4SLinus Torvalds return rv; 3931da177e4SLinus Torvalds } 3941da177e4SLinus Torvalds 3951da177e4SLinus Torvalds static struct file_operations transaction_ops = { 3961da177e4SLinus Torvalds .write = selinux_transaction_write, 3971da177e4SLinus Torvalds .read = simple_transaction_read, 3981da177e4SLinus Torvalds .release = simple_transaction_release, 3991da177e4SLinus Torvalds }; 4001da177e4SLinus Torvalds 4011da177e4SLinus Torvalds /* 4021da177e4SLinus Torvalds * payload - write methods 4031da177e4SLinus Torvalds * If the method has a response, the response should be put in buf, 4041da177e4SLinus Torvalds * and the length returned. Otherwise return 0 or and -error. 4051da177e4SLinus Torvalds */ 4061da177e4SLinus Torvalds 4071da177e4SLinus Torvalds static ssize_t sel_write_access(struct file * file, char *buf, size_t size) 4081da177e4SLinus Torvalds { 4091da177e4SLinus Torvalds char *scon, *tcon; 4101da177e4SLinus Torvalds u32 ssid, tsid; 4111da177e4SLinus Torvalds u16 tclass; 4121da177e4SLinus Torvalds u32 req; 4131da177e4SLinus Torvalds struct av_decision avd; 4141da177e4SLinus Torvalds ssize_t length; 4151da177e4SLinus Torvalds 4161da177e4SLinus Torvalds length = task_has_security(current, SECURITY__COMPUTE_AV); 4171da177e4SLinus Torvalds if (length) 4181da177e4SLinus Torvalds return length; 4191da177e4SLinus Torvalds 4201da177e4SLinus Torvalds length = -ENOMEM; 42189d155efSJames Morris scon = kzalloc(size+1, GFP_KERNEL); 4221da177e4SLinus Torvalds if (!scon) 4231da177e4SLinus Torvalds return length; 4241da177e4SLinus Torvalds 42589d155efSJames Morris tcon = kzalloc(size+1, GFP_KERNEL); 4261da177e4SLinus Torvalds if (!tcon) 4271da177e4SLinus Torvalds goto out; 4281da177e4SLinus Torvalds 4291da177e4SLinus Torvalds length = -EINVAL; 4301da177e4SLinus Torvalds if (sscanf(buf, "%s %s %hu %x", scon, tcon, &tclass, &req) != 4) 4311da177e4SLinus Torvalds goto out2; 4321da177e4SLinus Torvalds 4331da177e4SLinus Torvalds length = security_context_to_sid(scon, strlen(scon)+1, &ssid); 4341da177e4SLinus Torvalds if (length < 0) 4351da177e4SLinus Torvalds goto out2; 4361da177e4SLinus Torvalds length = security_context_to_sid(tcon, strlen(tcon)+1, &tsid); 4371da177e4SLinus Torvalds if (length < 0) 4381da177e4SLinus Torvalds goto out2; 4391da177e4SLinus Torvalds 4401da177e4SLinus Torvalds length = security_compute_av(ssid, tsid, tclass, req, &avd); 4411da177e4SLinus Torvalds if (length < 0) 4421da177e4SLinus Torvalds goto out2; 4431da177e4SLinus Torvalds 4441da177e4SLinus Torvalds length = scnprintf(buf, SIMPLE_TRANSACTION_LIMIT, 4451da177e4SLinus Torvalds "%x %x %x %x %u", 4461da177e4SLinus Torvalds avd.allowed, avd.decided, 4471da177e4SLinus Torvalds avd.auditallow, avd.auditdeny, 4481da177e4SLinus Torvalds avd.seqno); 4491da177e4SLinus Torvalds out2: 4501da177e4SLinus Torvalds kfree(tcon); 4511da177e4SLinus Torvalds out: 4521da177e4SLinus Torvalds kfree(scon); 4531da177e4SLinus Torvalds return length; 4541da177e4SLinus Torvalds } 4551da177e4SLinus Torvalds 4561da177e4SLinus Torvalds static ssize_t sel_write_create(struct file * file, char *buf, size_t size) 4571da177e4SLinus Torvalds { 4581da177e4SLinus Torvalds char *scon, *tcon; 4591da177e4SLinus Torvalds u32 ssid, tsid, newsid; 4601da177e4SLinus Torvalds u16 tclass; 4611da177e4SLinus Torvalds ssize_t length; 4621da177e4SLinus Torvalds char *newcon; 4631da177e4SLinus Torvalds u32 len; 4641da177e4SLinus Torvalds 4651da177e4SLinus Torvalds length = task_has_security(current, SECURITY__COMPUTE_CREATE); 4661da177e4SLinus Torvalds if (length) 4671da177e4SLinus Torvalds return length; 4681da177e4SLinus Torvalds 4691da177e4SLinus Torvalds length = -ENOMEM; 47089d155efSJames Morris scon = kzalloc(size+1, GFP_KERNEL); 4711da177e4SLinus Torvalds if (!scon) 4721da177e4SLinus Torvalds return length; 4731da177e4SLinus Torvalds 47489d155efSJames Morris tcon = kzalloc(size+1, GFP_KERNEL); 4751da177e4SLinus Torvalds if (!tcon) 4761da177e4SLinus Torvalds goto out; 4771da177e4SLinus Torvalds 4781da177e4SLinus Torvalds length = -EINVAL; 4791da177e4SLinus Torvalds if (sscanf(buf, "%s %s %hu", scon, tcon, &tclass) != 3) 4801da177e4SLinus Torvalds goto out2; 4811da177e4SLinus Torvalds 4821da177e4SLinus Torvalds length = security_context_to_sid(scon, strlen(scon)+1, &ssid); 4831da177e4SLinus Torvalds if (length < 0) 4841da177e4SLinus Torvalds goto out2; 4851da177e4SLinus Torvalds length = security_context_to_sid(tcon, strlen(tcon)+1, &tsid); 4861da177e4SLinus Torvalds if (length < 0) 4871da177e4SLinus Torvalds goto out2; 4881da177e4SLinus Torvalds 4891da177e4SLinus Torvalds length = security_transition_sid(ssid, tsid, tclass, &newsid); 4901da177e4SLinus Torvalds if (length < 0) 4911da177e4SLinus Torvalds goto out2; 4921da177e4SLinus Torvalds 4931da177e4SLinus Torvalds length = security_sid_to_context(newsid, &newcon, &len); 4941da177e4SLinus Torvalds if (length < 0) 4951da177e4SLinus Torvalds goto out2; 4961da177e4SLinus Torvalds 4971da177e4SLinus Torvalds if (len > SIMPLE_TRANSACTION_LIMIT) { 4981da177e4SLinus Torvalds printk(KERN_ERR "%s: context size (%u) exceeds payload " 4991da177e4SLinus Torvalds "max\n", __FUNCTION__, len); 5001da177e4SLinus Torvalds length = -ERANGE; 5011da177e4SLinus Torvalds goto out3; 5021da177e4SLinus Torvalds } 5031da177e4SLinus Torvalds 5041da177e4SLinus Torvalds memcpy(buf, newcon, len); 5051da177e4SLinus Torvalds length = len; 5061da177e4SLinus Torvalds out3: 5071da177e4SLinus Torvalds kfree(newcon); 5081da177e4SLinus Torvalds out2: 5091da177e4SLinus Torvalds kfree(tcon); 5101da177e4SLinus Torvalds out: 5111da177e4SLinus Torvalds kfree(scon); 5121da177e4SLinus Torvalds return length; 5131da177e4SLinus Torvalds } 5141da177e4SLinus Torvalds 5151da177e4SLinus Torvalds static ssize_t sel_write_relabel(struct file * file, char *buf, size_t size) 5161da177e4SLinus Torvalds { 5171da177e4SLinus Torvalds char *scon, *tcon; 5181da177e4SLinus Torvalds u32 ssid, tsid, newsid; 5191da177e4SLinus Torvalds u16 tclass; 5201da177e4SLinus Torvalds ssize_t length; 5211da177e4SLinus Torvalds char *newcon; 5221da177e4SLinus Torvalds u32 len; 5231da177e4SLinus Torvalds 5241da177e4SLinus Torvalds length = task_has_security(current, SECURITY__COMPUTE_RELABEL); 5251da177e4SLinus Torvalds if (length) 5261da177e4SLinus Torvalds return length; 5271da177e4SLinus Torvalds 5281da177e4SLinus Torvalds length = -ENOMEM; 52989d155efSJames Morris scon = kzalloc(size+1, GFP_KERNEL); 5301da177e4SLinus Torvalds if (!scon) 5311da177e4SLinus Torvalds return length; 5321da177e4SLinus Torvalds 53389d155efSJames Morris tcon = kzalloc(size+1, GFP_KERNEL); 5341da177e4SLinus Torvalds if (!tcon) 5351da177e4SLinus Torvalds goto out; 5361da177e4SLinus Torvalds 5371da177e4SLinus Torvalds length = -EINVAL; 5381da177e4SLinus Torvalds if (sscanf(buf, "%s %s %hu", scon, tcon, &tclass) != 3) 5391da177e4SLinus Torvalds goto out2; 5401da177e4SLinus Torvalds 5411da177e4SLinus Torvalds length = security_context_to_sid(scon, strlen(scon)+1, &ssid); 5421da177e4SLinus Torvalds if (length < 0) 5431da177e4SLinus Torvalds goto out2; 5441da177e4SLinus Torvalds length = security_context_to_sid(tcon, strlen(tcon)+1, &tsid); 5451da177e4SLinus Torvalds if (length < 0) 5461da177e4SLinus Torvalds goto out2; 5471da177e4SLinus Torvalds 5481da177e4SLinus Torvalds length = security_change_sid(ssid, tsid, tclass, &newsid); 5491da177e4SLinus Torvalds if (length < 0) 5501da177e4SLinus Torvalds goto out2; 5511da177e4SLinus Torvalds 5521da177e4SLinus Torvalds length = security_sid_to_context(newsid, &newcon, &len); 5531da177e4SLinus Torvalds if (length < 0) 5541da177e4SLinus Torvalds goto out2; 5551da177e4SLinus Torvalds 5561da177e4SLinus Torvalds if (len > SIMPLE_TRANSACTION_LIMIT) { 5571da177e4SLinus Torvalds length = -ERANGE; 5581da177e4SLinus Torvalds goto out3; 5591da177e4SLinus Torvalds } 5601da177e4SLinus Torvalds 5611da177e4SLinus Torvalds memcpy(buf, newcon, len); 5621da177e4SLinus Torvalds length = len; 5631da177e4SLinus Torvalds out3: 5641da177e4SLinus Torvalds kfree(newcon); 5651da177e4SLinus Torvalds out2: 5661da177e4SLinus Torvalds kfree(tcon); 5671da177e4SLinus Torvalds out: 5681da177e4SLinus Torvalds kfree(scon); 5691da177e4SLinus Torvalds return length; 5701da177e4SLinus Torvalds } 5711da177e4SLinus Torvalds 5721da177e4SLinus Torvalds static ssize_t sel_write_user(struct file * file, char *buf, size_t size) 5731da177e4SLinus Torvalds { 5741da177e4SLinus Torvalds char *con, *user, *ptr; 5751da177e4SLinus Torvalds u32 sid, *sids; 5761da177e4SLinus Torvalds ssize_t length; 5771da177e4SLinus Torvalds char *newcon; 5781da177e4SLinus Torvalds int i, rc; 5791da177e4SLinus Torvalds u32 len, nsids; 5801da177e4SLinus Torvalds 5811da177e4SLinus Torvalds length = task_has_security(current, SECURITY__COMPUTE_USER); 5821da177e4SLinus Torvalds if (length) 5831da177e4SLinus Torvalds return length; 5841da177e4SLinus Torvalds 5851da177e4SLinus Torvalds length = -ENOMEM; 58689d155efSJames Morris con = kzalloc(size+1, GFP_KERNEL); 5871da177e4SLinus Torvalds if (!con) 5881da177e4SLinus Torvalds return length; 5891da177e4SLinus Torvalds 59089d155efSJames Morris user = kzalloc(size+1, GFP_KERNEL); 5911da177e4SLinus Torvalds if (!user) 5921da177e4SLinus Torvalds goto out; 5931da177e4SLinus Torvalds 5941da177e4SLinus Torvalds length = -EINVAL; 5951da177e4SLinus Torvalds if (sscanf(buf, "%s %s", con, user) != 2) 5961da177e4SLinus Torvalds goto out2; 5971da177e4SLinus Torvalds 5981da177e4SLinus Torvalds length = security_context_to_sid(con, strlen(con)+1, &sid); 5991da177e4SLinus Torvalds if (length < 0) 6001da177e4SLinus Torvalds goto out2; 6011da177e4SLinus Torvalds 6021da177e4SLinus Torvalds length = security_get_user_sids(sid, user, &sids, &nsids); 6031da177e4SLinus Torvalds if (length < 0) 6041da177e4SLinus Torvalds goto out2; 6051da177e4SLinus Torvalds 6061da177e4SLinus Torvalds length = sprintf(buf, "%u", nsids) + 1; 6071da177e4SLinus Torvalds ptr = buf + length; 6081da177e4SLinus Torvalds for (i = 0; i < nsids; i++) { 6091da177e4SLinus Torvalds rc = security_sid_to_context(sids[i], &newcon, &len); 6101da177e4SLinus Torvalds if (rc) { 6111da177e4SLinus Torvalds length = rc; 6121da177e4SLinus Torvalds goto out3; 6131da177e4SLinus Torvalds } 6141da177e4SLinus Torvalds if ((length + len) >= SIMPLE_TRANSACTION_LIMIT) { 6151da177e4SLinus Torvalds kfree(newcon); 6161da177e4SLinus Torvalds length = -ERANGE; 6171da177e4SLinus Torvalds goto out3; 6181da177e4SLinus Torvalds } 6191da177e4SLinus Torvalds memcpy(ptr, newcon, len); 6201da177e4SLinus Torvalds kfree(newcon); 6211da177e4SLinus Torvalds ptr += len; 6221da177e4SLinus Torvalds length += len; 6231da177e4SLinus Torvalds } 6241da177e4SLinus Torvalds out3: 6251da177e4SLinus Torvalds kfree(sids); 6261da177e4SLinus Torvalds out2: 6271da177e4SLinus Torvalds kfree(user); 6281da177e4SLinus Torvalds out: 6291da177e4SLinus Torvalds kfree(con); 6301da177e4SLinus Torvalds return length; 6311da177e4SLinus Torvalds } 6321da177e4SLinus Torvalds 6331da177e4SLinus Torvalds static ssize_t sel_write_member(struct file * file, char *buf, size_t size) 6341da177e4SLinus Torvalds { 6351da177e4SLinus Torvalds char *scon, *tcon; 6361da177e4SLinus Torvalds u32 ssid, tsid, newsid; 6371da177e4SLinus Torvalds u16 tclass; 6381da177e4SLinus Torvalds ssize_t length; 6391da177e4SLinus Torvalds char *newcon; 6401da177e4SLinus Torvalds u32 len; 6411da177e4SLinus Torvalds 6421da177e4SLinus Torvalds length = task_has_security(current, SECURITY__COMPUTE_MEMBER); 6431da177e4SLinus Torvalds if (length) 6441da177e4SLinus Torvalds return length; 6451da177e4SLinus Torvalds 6461da177e4SLinus Torvalds length = -ENOMEM; 64789d155efSJames Morris scon = kzalloc(size+1, GFP_KERNEL); 6481da177e4SLinus Torvalds if (!scon) 6491da177e4SLinus Torvalds return length; 6501da177e4SLinus Torvalds 65189d155efSJames Morris tcon = kzalloc(size+1, GFP_KERNEL); 6521da177e4SLinus Torvalds if (!tcon) 6531da177e4SLinus Torvalds goto out; 6541da177e4SLinus Torvalds 6551da177e4SLinus Torvalds length = -EINVAL; 6561da177e4SLinus Torvalds if (sscanf(buf, "%s %s %hu", scon, tcon, &tclass) != 3) 6571da177e4SLinus Torvalds goto out2; 6581da177e4SLinus Torvalds 6591da177e4SLinus Torvalds length = security_context_to_sid(scon, strlen(scon)+1, &ssid); 6601da177e4SLinus Torvalds if (length < 0) 6611da177e4SLinus Torvalds goto out2; 6621da177e4SLinus Torvalds length = security_context_to_sid(tcon, strlen(tcon)+1, &tsid); 6631da177e4SLinus Torvalds if (length < 0) 6641da177e4SLinus Torvalds goto out2; 6651da177e4SLinus Torvalds 6661da177e4SLinus Torvalds length = security_member_sid(ssid, tsid, tclass, &newsid); 6671da177e4SLinus Torvalds if (length < 0) 6681da177e4SLinus Torvalds goto out2; 6691da177e4SLinus Torvalds 6701da177e4SLinus Torvalds length = security_sid_to_context(newsid, &newcon, &len); 6711da177e4SLinus Torvalds if (length < 0) 6721da177e4SLinus Torvalds goto out2; 6731da177e4SLinus Torvalds 6741da177e4SLinus Torvalds if (len > SIMPLE_TRANSACTION_LIMIT) { 6751da177e4SLinus Torvalds printk(KERN_ERR "%s: context size (%u) exceeds payload " 6761da177e4SLinus Torvalds "max\n", __FUNCTION__, len); 6771da177e4SLinus Torvalds length = -ERANGE; 6781da177e4SLinus Torvalds goto out3; 6791da177e4SLinus Torvalds } 6801da177e4SLinus Torvalds 6811da177e4SLinus Torvalds memcpy(buf, newcon, len); 6821da177e4SLinus Torvalds length = len; 6831da177e4SLinus Torvalds out3: 6841da177e4SLinus Torvalds kfree(newcon); 6851da177e4SLinus Torvalds out2: 6861da177e4SLinus Torvalds kfree(tcon); 6871da177e4SLinus Torvalds out: 6881da177e4SLinus Torvalds kfree(scon); 6891da177e4SLinus Torvalds return length; 6901da177e4SLinus Torvalds } 6911da177e4SLinus Torvalds 6921da177e4SLinus Torvalds static struct inode *sel_make_inode(struct super_block *sb, int mode) 6931da177e4SLinus Torvalds { 6941da177e4SLinus Torvalds struct inode *ret = new_inode(sb); 6951da177e4SLinus Torvalds 6961da177e4SLinus Torvalds if (ret) { 6971da177e4SLinus Torvalds ret->i_mode = mode; 6981da177e4SLinus Torvalds ret->i_uid = ret->i_gid = 0; 6991da177e4SLinus Torvalds ret->i_blksize = PAGE_CACHE_SIZE; 7001da177e4SLinus Torvalds ret->i_blocks = 0; 7011da177e4SLinus Torvalds ret->i_atime = ret->i_mtime = ret->i_ctime = CURRENT_TIME; 7021da177e4SLinus Torvalds } 7031da177e4SLinus Torvalds return ret; 7041da177e4SLinus Torvalds } 7051da177e4SLinus Torvalds 7061da177e4SLinus Torvalds #define BOOL_INO_OFFSET 30 7071da177e4SLinus Torvalds 7081da177e4SLinus Torvalds static ssize_t sel_read_bool(struct file *filep, char __user *buf, 7091da177e4SLinus Torvalds size_t count, loff_t *ppos) 7101da177e4SLinus Torvalds { 7111da177e4SLinus Torvalds char *page = NULL; 7121da177e4SLinus Torvalds ssize_t length; 7131da177e4SLinus Torvalds ssize_t ret; 7141da177e4SLinus Torvalds int cur_enforcing; 7151da177e4SLinus Torvalds struct inode *inode; 7161da177e4SLinus Torvalds 717bb003079SIngo Molnar mutex_lock(&sel_mutex); 7181da177e4SLinus Torvalds 7191da177e4SLinus Torvalds ret = -EFAULT; 7201da177e4SLinus Torvalds 7211da177e4SLinus Torvalds /* check to see if this file has been deleted */ 7221da177e4SLinus Torvalds if (!filep->f_op) 7231da177e4SLinus Torvalds goto out; 7241da177e4SLinus Torvalds 725bfd51626SDavi Arnaut if (count > PAGE_SIZE) { 7261da177e4SLinus Torvalds ret = -EINVAL; 7271da177e4SLinus Torvalds goto out; 7281da177e4SLinus Torvalds } 7291da177e4SLinus Torvalds if (!(page = (char*)get_zeroed_page(GFP_KERNEL))) { 7301da177e4SLinus Torvalds ret = -ENOMEM; 7311da177e4SLinus Torvalds goto out; 7321da177e4SLinus Torvalds } 7331da177e4SLinus Torvalds 7341da177e4SLinus Torvalds inode = filep->f_dentry->d_inode; 7351da177e4SLinus Torvalds cur_enforcing = security_get_bool_value(inode->i_ino - BOOL_INO_OFFSET); 7361da177e4SLinus Torvalds if (cur_enforcing < 0) { 7371da177e4SLinus Torvalds ret = cur_enforcing; 7381da177e4SLinus Torvalds goto out; 7391da177e4SLinus Torvalds } 7401da177e4SLinus Torvalds 7411da177e4SLinus Torvalds length = scnprintf(page, PAGE_SIZE, "%d %d", cur_enforcing, 7421da177e4SLinus Torvalds bool_pending_values[inode->i_ino - BOOL_INO_OFFSET]); 74368bdcf28SStephen Smalley ret = simple_read_from_buffer(buf, count, ppos, page, length); 7441da177e4SLinus Torvalds out: 745bb003079SIngo Molnar mutex_unlock(&sel_mutex); 7461da177e4SLinus Torvalds if (page) 7471da177e4SLinus Torvalds free_page((unsigned long)page); 7481da177e4SLinus Torvalds return ret; 7491da177e4SLinus Torvalds } 7501da177e4SLinus Torvalds 7511da177e4SLinus Torvalds static ssize_t sel_write_bool(struct file *filep, const char __user *buf, 7521da177e4SLinus Torvalds size_t count, loff_t *ppos) 7531da177e4SLinus Torvalds { 7541da177e4SLinus Torvalds char *page = NULL; 7551da177e4SLinus Torvalds ssize_t length = -EFAULT; 7561da177e4SLinus Torvalds int new_value; 7571da177e4SLinus Torvalds struct inode *inode; 7581da177e4SLinus Torvalds 759bb003079SIngo Molnar mutex_lock(&sel_mutex); 7601da177e4SLinus Torvalds 7611da177e4SLinus Torvalds length = task_has_security(current, SECURITY__SETBOOL); 7621da177e4SLinus Torvalds if (length) 7631da177e4SLinus Torvalds goto out; 7641da177e4SLinus Torvalds 7651da177e4SLinus Torvalds /* check to see if this file has been deleted */ 7661da177e4SLinus Torvalds if (!filep->f_op) 7671da177e4SLinus Torvalds goto out; 7681da177e4SLinus Torvalds 769bfd51626SDavi Arnaut if (count >= PAGE_SIZE) { 7701da177e4SLinus Torvalds length = -ENOMEM; 7711da177e4SLinus Torvalds goto out; 7721da177e4SLinus Torvalds } 7731da177e4SLinus Torvalds if (*ppos != 0) { 7741da177e4SLinus Torvalds /* No partial writes. */ 7751da177e4SLinus Torvalds goto out; 7761da177e4SLinus Torvalds } 7771da177e4SLinus Torvalds page = (char*)get_zeroed_page(GFP_KERNEL); 7781da177e4SLinus Torvalds if (!page) { 7791da177e4SLinus Torvalds length = -ENOMEM; 7801da177e4SLinus Torvalds goto out; 7811da177e4SLinus Torvalds } 7821da177e4SLinus Torvalds 7831da177e4SLinus Torvalds if (copy_from_user(page, buf, count)) 7841da177e4SLinus Torvalds goto out; 7851da177e4SLinus Torvalds 7861da177e4SLinus Torvalds length = -EINVAL; 7871da177e4SLinus Torvalds if (sscanf(page, "%d", &new_value) != 1) 7881da177e4SLinus Torvalds goto out; 7891da177e4SLinus Torvalds 7901da177e4SLinus Torvalds if (new_value) 7911da177e4SLinus Torvalds new_value = 1; 7921da177e4SLinus Torvalds 7931da177e4SLinus Torvalds inode = filep->f_dentry->d_inode; 7941da177e4SLinus Torvalds bool_pending_values[inode->i_ino - BOOL_INO_OFFSET] = new_value; 7951da177e4SLinus Torvalds length = count; 7961da177e4SLinus Torvalds 7971da177e4SLinus Torvalds out: 798bb003079SIngo Molnar mutex_unlock(&sel_mutex); 7991da177e4SLinus Torvalds if (page) 8001da177e4SLinus Torvalds free_page((unsigned long) page); 8011da177e4SLinus Torvalds return length; 8021da177e4SLinus Torvalds } 8031da177e4SLinus Torvalds 8041da177e4SLinus Torvalds static struct file_operations sel_bool_ops = { 8051da177e4SLinus Torvalds .read = sel_read_bool, 8061da177e4SLinus Torvalds .write = sel_write_bool, 8071da177e4SLinus Torvalds }; 8081da177e4SLinus Torvalds 8091da177e4SLinus Torvalds static ssize_t sel_commit_bools_write(struct file *filep, 8101da177e4SLinus Torvalds const char __user *buf, 8111da177e4SLinus Torvalds size_t count, loff_t *ppos) 8121da177e4SLinus Torvalds { 8131da177e4SLinus Torvalds char *page = NULL; 8141da177e4SLinus Torvalds ssize_t length = -EFAULT; 8151da177e4SLinus Torvalds int new_value; 8161da177e4SLinus Torvalds 817bb003079SIngo Molnar mutex_lock(&sel_mutex); 8181da177e4SLinus Torvalds 8191da177e4SLinus Torvalds length = task_has_security(current, SECURITY__SETBOOL); 8201da177e4SLinus Torvalds if (length) 8211da177e4SLinus Torvalds goto out; 8221da177e4SLinus Torvalds 8231da177e4SLinus Torvalds /* check to see if this file has been deleted */ 8241da177e4SLinus Torvalds if (!filep->f_op) 8251da177e4SLinus Torvalds goto out; 8261da177e4SLinus Torvalds 827bfd51626SDavi Arnaut if (count >= PAGE_SIZE) { 8281da177e4SLinus Torvalds length = -ENOMEM; 8291da177e4SLinus Torvalds goto out; 8301da177e4SLinus Torvalds } 8311da177e4SLinus Torvalds if (*ppos != 0) { 8321da177e4SLinus Torvalds /* No partial writes. */ 8331da177e4SLinus Torvalds goto out; 8341da177e4SLinus Torvalds } 8351da177e4SLinus Torvalds page = (char*)get_zeroed_page(GFP_KERNEL); 8361da177e4SLinus Torvalds if (!page) { 8371da177e4SLinus Torvalds length = -ENOMEM; 8381da177e4SLinus Torvalds goto out; 8391da177e4SLinus Torvalds } 8401da177e4SLinus Torvalds 8411da177e4SLinus Torvalds if (copy_from_user(page, buf, count)) 8421da177e4SLinus Torvalds goto out; 8431da177e4SLinus Torvalds 8441da177e4SLinus Torvalds length = -EINVAL; 8451da177e4SLinus Torvalds if (sscanf(page, "%d", &new_value) != 1) 8461da177e4SLinus Torvalds goto out; 8471da177e4SLinus Torvalds 84820c19e41SDavi Arnaut if (new_value && bool_pending_values) { 8491da177e4SLinus Torvalds security_set_bools(bool_num, bool_pending_values); 8501da177e4SLinus Torvalds } 8511da177e4SLinus Torvalds 8521da177e4SLinus Torvalds length = count; 8531da177e4SLinus Torvalds 8541da177e4SLinus Torvalds out: 855bb003079SIngo Molnar mutex_unlock(&sel_mutex); 8561da177e4SLinus Torvalds if (page) 8571da177e4SLinus Torvalds free_page((unsigned long) page); 8581da177e4SLinus Torvalds return length; 8591da177e4SLinus Torvalds } 8601da177e4SLinus Torvalds 8611da177e4SLinus Torvalds static struct file_operations sel_commit_bools_ops = { 8621da177e4SLinus Torvalds .write = sel_commit_bools_write, 8631da177e4SLinus Torvalds }; 8641da177e4SLinus Torvalds 8651da177e4SLinus Torvalds /* delete booleans - partial revoke() from 8661da177e4SLinus Torvalds * fs/proc/generic.c proc_kill_inodes */ 8671da177e4SLinus Torvalds static void sel_remove_bools(struct dentry *de) 8681da177e4SLinus Torvalds { 8691da177e4SLinus Torvalds struct list_head *p, *node; 8701da177e4SLinus Torvalds struct super_block *sb = de->d_sb; 8711da177e4SLinus Torvalds 8721da177e4SLinus Torvalds spin_lock(&dcache_lock); 8731da177e4SLinus Torvalds node = de->d_subdirs.next; 8741da177e4SLinus Torvalds while (node != &de->d_subdirs) { 8755160ee6fSEric Dumazet struct dentry *d = list_entry(node, struct dentry, d_u.d_child); 8761da177e4SLinus Torvalds list_del_init(node); 8771da177e4SLinus Torvalds 8781da177e4SLinus Torvalds if (d->d_inode) { 8791da177e4SLinus Torvalds d = dget_locked(d); 8801da177e4SLinus Torvalds spin_unlock(&dcache_lock); 8811da177e4SLinus Torvalds d_delete(d); 8821da177e4SLinus Torvalds simple_unlink(de->d_inode, d); 8831da177e4SLinus Torvalds dput(d); 8841da177e4SLinus Torvalds spin_lock(&dcache_lock); 8851da177e4SLinus Torvalds } 8861da177e4SLinus Torvalds node = de->d_subdirs.next; 8871da177e4SLinus Torvalds } 8881da177e4SLinus Torvalds 8891da177e4SLinus Torvalds spin_unlock(&dcache_lock); 8901da177e4SLinus Torvalds 8911da177e4SLinus Torvalds file_list_lock(); 8921da177e4SLinus Torvalds list_for_each(p, &sb->s_files) { 8932f512016SEric Dumazet struct file * filp = list_entry(p, struct file, f_u.fu_list); 8941da177e4SLinus Torvalds struct dentry * dentry = filp->f_dentry; 8951da177e4SLinus Torvalds 8961da177e4SLinus Torvalds if (dentry->d_parent != de) { 8971da177e4SLinus Torvalds continue; 8981da177e4SLinus Torvalds } 8991da177e4SLinus Torvalds filp->f_op = NULL; 9001da177e4SLinus Torvalds } 9011da177e4SLinus Torvalds file_list_unlock(); 9021da177e4SLinus Torvalds } 9031da177e4SLinus Torvalds 9041da177e4SLinus Torvalds #define BOOL_DIR_NAME "booleans" 9051da177e4SLinus Torvalds 9061da177e4SLinus Torvalds static int sel_make_bools(void) 9071da177e4SLinus Torvalds { 9081da177e4SLinus Torvalds int i, ret = 0; 9091da177e4SLinus Torvalds ssize_t len; 9101da177e4SLinus Torvalds struct dentry *dentry = NULL; 9111da177e4SLinus Torvalds struct dentry *dir = bool_dir; 9121da177e4SLinus Torvalds struct inode *inode = NULL; 9131da177e4SLinus Torvalds struct inode_security_struct *isec; 9141da177e4SLinus Torvalds char **names = NULL, *page; 9151da177e4SLinus Torvalds int num; 9161da177e4SLinus Torvalds int *values = NULL; 9171da177e4SLinus Torvalds u32 sid; 9181da177e4SLinus Torvalds 9191da177e4SLinus Torvalds /* remove any existing files */ 9201da177e4SLinus Torvalds kfree(bool_pending_values); 92120c19e41SDavi Arnaut bool_pending_values = NULL; 9221da177e4SLinus Torvalds 9231da177e4SLinus Torvalds sel_remove_bools(dir); 9241da177e4SLinus Torvalds 9251da177e4SLinus Torvalds if (!(page = (char*)get_zeroed_page(GFP_KERNEL))) 9261da177e4SLinus Torvalds return -ENOMEM; 9271da177e4SLinus Torvalds 9281da177e4SLinus Torvalds ret = security_get_bools(&num, &names, &values); 9291da177e4SLinus Torvalds if (ret != 0) 9301da177e4SLinus Torvalds goto out; 9311da177e4SLinus Torvalds 9321da177e4SLinus Torvalds for (i = 0; i < num; i++) { 9331da177e4SLinus Torvalds dentry = d_alloc_name(dir, names[i]); 9341da177e4SLinus Torvalds if (!dentry) { 9351da177e4SLinus Torvalds ret = -ENOMEM; 9361da177e4SLinus Torvalds goto err; 9371da177e4SLinus Torvalds } 9381da177e4SLinus Torvalds inode = sel_make_inode(dir->d_sb, S_IFREG | S_IRUGO | S_IWUSR); 9391da177e4SLinus Torvalds if (!inode) { 9401da177e4SLinus Torvalds ret = -ENOMEM; 9411da177e4SLinus Torvalds goto err; 9421da177e4SLinus Torvalds } 9431da177e4SLinus Torvalds 9441da177e4SLinus Torvalds len = snprintf(page, PAGE_SIZE, "/%s/%s", BOOL_DIR_NAME, names[i]); 9451da177e4SLinus Torvalds if (len < 0) { 9461da177e4SLinus Torvalds ret = -EINVAL; 9471da177e4SLinus Torvalds goto err; 9481da177e4SLinus Torvalds } else if (len >= PAGE_SIZE) { 9491da177e4SLinus Torvalds ret = -ENAMETOOLONG; 9501da177e4SLinus Torvalds goto err; 9511da177e4SLinus Torvalds } 9521da177e4SLinus Torvalds isec = (struct inode_security_struct*)inode->i_security; 9531da177e4SLinus Torvalds if ((ret = security_genfs_sid("selinuxfs", page, SECCLASS_FILE, &sid))) 9541da177e4SLinus Torvalds goto err; 9551da177e4SLinus Torvalds isec->sid = sid; 9561da177e4SLinus Torvalds isec->initialized = 1; 9571da177e4SLinus Torvalds inode->i_fop = &sel_bool_ops; 9581da177e4SLinus Torvalds inode->i_ino = i + BOOL_INO_OFFSET; 9591da177e4SLinus Torvalds d_add(dentry, inode); 9601da177e4SLinus Torvalds } 9611da177e4SLinus Torvalds bool_num = num; 9621da177e4SLinus Torvalds bool_pending_values = values; 9631da177e4SLinus Torvalds out: 9641da177e4SLinus Torvalds free_page((unsigned long)page); 9651da177e4SLinus Torvalds if (names) { 9669a5f04bfSJesper Juhl for (i = 0; i < num; i++) 9671da177e4SLinus Torvalds kfree(names[i]); 9681da177e4SLinus Torvalds kfree(names); 9691da177e4SLinus Torvalds } 9701da177e4SLinus Torvalds return ret; 9711da177e4SLinus Torvalds err: 97220c19e41SDavi Arnaut kfree(values); 973253a8b1dSJames Morris sel_remove_bools(dir); 9741da177e4SLinus Torvalds ret = -ENOMEM; 9751da177e4SLinus Torvalds goto out; 9761da177e4SLinus Torvalds } 9771da177e4SLinus Torvalds 9781da177e4SLinus Torvalds #define NULL_FILE_NAME "null" 9791da177e4SLinus Torvalds 9801da177e4SLinus Torvalds struct dentry *selinux_null = NULL; 9811da177e4SLinus Torvalds 9821da177e4SLinus Torvalds static ssize_t sel_read_avc_cache_threshold(struct file *filp, char __user *buf, 9831da177e4SLinus Torvalds size_t count, loff_t *ppos) 9841da177e4SLinus Torvalds { 9851da177e4SLinus Torvalds char tmpbuf[TMPBUFLEN]; 9861da177e4SLinus Torvalds ssize_t length; 9871da177e4SLinus Torvalds 9881da177e4SLinus Torvalds length = scnprintf(tmpbuf, TMPBUFLEN, "%u", avc_cache_threshold); 9891da177e4SLinus Torvalds return simple_read_from_buffer(buf, count, ppos, tmpbuf, length); 9901da177e4SLinus Torvalds } 9911da177e4SLinus Torvalds 9921da177e4SLinus Torvalds static ssize_t sel_write_avc_cache_threshold(struct file * file, 9931da177e4SLinus Torvalds const char __user * buf, 9941da177e4SLinus Torvalds size_t count, loff_t *ppos) 9951da177e4SLinus Torvalds 9961da177e4SLinus Torvalds { 9971da177e4SLinus Torvalds char *page; 9981da177e4SLinus Torvalds ssize_t ret; 9991da177e4SLinus Torvalds int new_value; 10001da177e4SLinus Torvalds 1001bfd51626SDavi Arnaut if (count >= PAGE_SIZE) { 10021da177e4SLinus Torvalds ret = -ENOMEM; 10031da177e4SLinus Torvalds goto out; 10041da177e4SLinus Torvalds } 10051da177e4SLinus Torvalds 10061da177e4SLinus Torvalds if (*ppos != 0) { 10071da177e4SLinus Torvalds /* No partial writes. */ 10081da177e4SLinus Torvalds ret = -EINVAL; 10091da177e4SLinus Torvalds goto out; 10101da177e4SLinus Torvalds } 10111da177e4SLinus Torvalds 10121da177e4SLinus Torvalds page = (char*)get_zeroed_page(GFP_KERNEL); 10131da177e4SLinus Torvalds if (!page) { 10141da177e4SLinus Torvalds ret = -ENOMEM; 10151da177e4SLinus Torvalds goto out; 10161da177e4SLinus Torvalds } 10171da177e4SLinus Torvalds 10181da177e4SLinus Torvalds if (copy_from_user(page, buf, count)) { 10191da177e4SLinus Torvalds ret = -EFAULT; 10201da177e4SLinus Torvalds goto out_free; 10211da177e4SLinus Torvalds } 10221da177e4SLinus Torvalds 10231da177e4SLinus Torvalds if (sscanf(page, "%u", &new_value) != 1) { 10241da177e4SLinus Torvalds ret = -EINVAL; 10251da177e4SLinus Torvalds goto out; 10261da177e4SLinus Torvalds } 10271da177e4SLinus Torvalds 10281da177e4SLinus Torvalds if (new_value != avc_cache_threshold) { 10291da177e4SLinus Torvalds ret = task_has_security(current, SECURITY__SETSECPARAM); 10301da177e4SLinus Torvalds if (ret) 10311da177e4SLinus Torvalds goto out_free; 10321da177e4SLinus Torvalds avc_cache_threshold = new_value; 10331da177e4SLinus Torvalds } 10341da177e4SLinus Torvalds ret = count; 10351da177e4SLinus Torvalds out_free: 10361da177e4SLinus Torvalds free_page((unsigned long)page); 10371da177e4SLinus Torvalds out: 10381da177e4SLinus Torvalds return ret; 10391da177e4SLinus Torvalds } 10401da177e4SLinus Torvalds 10411da177e4SLinus Torvalds static ssize_t sel_read_avc_hash_stats(struct file *filp, char __user *buf, 10421da177e4SLinus Torvalds size_t count, loff_t *ppos) 10431da177e4SLinus Torvalds { 10441da177e4SLinus Torvalds char *page; 10451da177e4SLinus Torvalds ssize_t ret = 0; 10461da177e4SLinus Torvalds 10471da177e4SLinus Torvalds page = (char *)__get_free_page(GFP_KERNEL); 10481da177e4SLinus Torvalds if (!page) { 10491da177e4SLinus Torvalds ret = -ENOMEM; 10501da177e4SLinus Torvalds goto out; 10511da177e4SLinus Torvalds } 10521da177e4SLinus Torvalds ret = avc_get_hash_stats(page); 10531da177e4SLinus Torvalds if (ret >= 0) 10541da177e4SLinus Torvalds ret = simple_read_from_buffer(buf, count, ppos, page, ret); 10551da177e4SLinus Torvalds free_page((unsigned long)page); 10561da177e4SLinus Torvalds out: 10571da177e4SLinus Torvalds return ret; 10581da177e4SLinus Torvalds } 10591da177e4SLinus Torvalds 10601da177e4SLinus Torvalds static struct file_operations sel_avc_cache_threshold_ops = { 10611da177e4SLinus Torvalds .read = sel_read_avc_cache_threshold, 10621da177e4SLinus Torvalds .write = sel_write_avc_cache_threshold, 10631da177e4SLinus Torvalds }; 10641da177e4SLinus Torvalds 10651da177e4SLinus Torvalds static struct file_operations sel_avc_hash_stats_ops = { 10661da177e4SLinus Torvalds .read = sel_read_avc_hash_stats, 10671da177e4SLinus Torvalds }; 10681da177e4SLinus Torvalds 10691da177e4SLinus Torvalds #ifdef CONFIG_SECURITY_SELINUX_AVC_STATS 10701da177e4SLinus Torvalds static struct avc_cache_stats *sel_avc_get_stat_idx(loff_t *idx) 10711da177e4SLinus Torvalds { 10721da177e4SLinus Torvalds int cpu; 10731da177e4SLinus Torvalds 10741da177e4SLinus Torvalds for (cpu = *idx; cpu < NR_CPUS; ++cpu) { 10751da177e4SLinus Torvalds if (!cpu_possible(cpu)) 10761da177e4SLinus Torvalds continue; 10771da177e4SLinus Torvalds *idx = cpu + 1; 10781da177e4SLinus Torvalds return &per_cpu(avc_cache_stats, cpu); 10791da177e4SLinus Torvalds } 10801da177e4SLinus Torvalds return NULL; 10811da177e4SLinus Torvalds } 10821da177e4SLinus Torvalds 10831da177e4SLinus Torvalds static void *sel_avc_stats_seq_start(struct seq_file *seq, loff_t *pos) 10841da177e4SLinus Torvalds { 10851da177e4SLinus Torvalds loff_t n = *pos - 1; 10861da177e4SLinus Torvalds 10871da177e4SLinus Torvalds if (*pos == 0) 10881da177e4SLinus Torvalds return SEQ_START_TOKEN; 10891da177e4SLinus Torvalds 10901da177e4SLinus Torvalds return sel_avc_get_stat_idx(&n); 10911da177e4SLinus Torvalds } 10921da177e4SLinus Torvalds 10931da177e4SLinus Torvalds static void *sel_avc_stats_seq_next(struct seq_file *seq, void *v, loff_t *pos) 10941da177e4SLinus Torvalds { 10951da177e4SLinus Torvalds return sel_avc_get_stat_idx(pos); 10961da177e4SLinus Torvalds } 10971da177e4SLinus Torvalds 10981da177e4SLinus Torvalds static int sel_avc_stats_seq_show(struct seq_file *seq, void *v) 10991da177e4SLinus Torvalds { 11001da177e4SLinus Torvalds struct avc_cache_stats *st = v; 11011da177e4SLinus Torvalds 11021da177e4SLinus Torvalds if (v == SEQ_START_TOKEN) 11031da177e4SLinus Torvalds seq_printf(seq, "lookups hits misses allocations reclaims " 11041da177e4SLinus Torvalds "frees\n"); 11051da177e4SLinus Torvalds else 11061da177e4SLinus Torvalds seq_printf(seq, "%u %u %u %u %u %u\n", st->lookups, 11071da177e4SLinus Torvalds st->hits, st->misses, st->allocations, 11081da177e4SLinus Torvalds st->reclaims, st->frees); 11091da177e4SLinus Torvalds return 0; 11101da177e4SLinus Torvalds } 11111da177e4SLinus Torvalds 11121da177e4SLinus Torvalds static void sel_avc_stats_seq_stop(struct seq_file *seq, void *v) 11131da177e4SLinus Torvalds { } 11141da177e4SLinus Torvalds 11151da177e4SLinus Torvalds static struct seq_operations sel_avc_cache_stats_seq_ops = { 11161da177e4SLinus Torvalds .start = sel_avc_stats_seq_start, 11171da177e4SLinus Torvalds .next = sel_avc_stats_seq_next, 11181da177e4SLinus Torvalds .show = sel_avc_stats_seq_show, 11191da177e4SLinus Torvalds .stop = sel_avc_stats_seq_stop, 11201da177e4SLinus Torvalds }; 11211da177e4SLinus Torvalds 11221da177e4SLinus Torvalds static int sel_open_avc_cache_stats(struct inode *inode, struct file *file) 11231da177e4SLinus Torvalds { 11241da177e4SLinus Torvalds return seq_open(file, &sel_avc_cache_stats_seq_ops); 11251da177e4SLinus Torvalds } 11261da177e4SLinus Torvalds 11271da177e4SLinus Torvalds static struct file_operations sel_avc_cache_stats_ops = { 11281da177e4SLinus Torvalds .open = sel_open_avc_cache_stats, 11291da177e4SLinus Torvalds .read = seq_read, 11301da177e4SLinus Torvalds .llseek = seq_lseek, 11311da177e4SLinus Torvalds .release = seq_release, 11321da177e4SLinus Torvalds }; 11331da177e4SLinus Torvalds #endif 11341da177e4SLinus Torvalds 11351da177e4SLinus Torvalds static int sel_make_avc_files(struct dentry *dir) 11361da177e4SLinus Torvalds { 11371da177e4SLinus Torvalds int i, ret = 0; 11381da177e4SLinus Torvalds static struct tree_descr files[] = { 11391da177e4SLinus Torvalds { "cache_threshold", 11401da177e4SLinus Torvalds &sel_avc_cache_threshold_ops, S_IRUGO|S_IWUSR }, 11411da177e4SLinus Torvalds { "hash_stats", &sel_avc_hash_stats_ops, S_IRUGO }, 11421da177e4SLinus Torvalds #ifdef CONFIG_SECURITY_SELINUX_AVC_STATS 11431da177e4SLinus Torvalds { "cache_stats", &sel_avc_cache_stats_ops, S_IRUGO }, 11441da177e4SLinus Torvalds #endif 11451da177e4SLinus Torvalds }; 11461da177e4SLinus Torvalds 11476e20a64aSNicolas Kaiser for (i = 0; i < ARRAY_SIZE(files); i++) { 11481da177e4SLinus Torvalds struct inode *inode; 11491da177e4SLinus Torvalds struct dentry *dentry; 11501da177e4SLinus Torvalds 11511da177e4SLinus Torvalds dentry = d_alloc_name(dir, files[i].name); 11521da177e4SLinus Torvalds if (!dentry) { 11531da177e4SLinus Torvalds ret = -ENOMEM; 11541da177e4SLinus Torvalds goto err; 11551da177e4SLinus Torvalds } 11561da177e4SLinus Torvalds 11571da177e4SLinus Torvalds inode = sel_make_inode(dir->d_sb, S_IFREG|files[i].mode); 11581da177e4SLinus Torvalds if (!inode) { 11591da177e4SLinus Torvalds ret = -ENOMEM; 11601da177e4SLinus Torvalds goto err; 11611da177e4SLinus Torvalds } 11621da177e4SLinus Torvalds inode->i_fop = files[i].ops; 11631da177e4SLinus Torvalds d_add(dentry, inode); 11641da177e4SLinus Torvalds } 11651da177e4SLinus Torvalds out: 11661da177e4SLinus Torvalds return ret; 11671da177e4SLinus Torvalds err: 11681da177e4SLinus Torvalds d_genocide(dir); 11691da177e4SLinus Torvalds goto out; 11701da177e4SLinus Torvalds } 11711da177e4SLinus Torvalds 11721da177e4SLinus Torvalds static int sel_make_dir(struct super_block *sb, struct dentry *dentry) 11731da177e4SLinus Torvalds { 11741da177e4SLinus Torvalds int ret = 0; 11751da177e4SLinus Torvalds struct inode *inode; 11761da177e4SLinus Torvalds 11771da177e4SLinus Torvalds inode = sel_make_inode(sb, S_IFDIR | S_IRUGO | S_IXUGO); 11781da177e4SLinus Torvalds if (!inode) { 11791da177e4SLinus Torvalds ret = -ENOMEM; 11801da177e4SLinus Torvalds goto out; 11811da177e4SLinus Torvalds } 11821da177e4SLinus Torvalds inode->i_op = &simple_dir_inode_operations; 11831da177e4SLinus Torvalds inode->i_fop = &simple_dir_operations; 118440e906f8SJames Morris /* directory inodes start off with i_nlink == 2 (for "." entry) */ 118540e906f8SJames Morris inode->i_nlink++; 11861da177e4SLinus Torvalds d_add(dentry, inode); 11871da177e4SLinus Torvalds out: 11881da177e4SLinus Torvalds return ret; 11891da177e4SLinus Torvalds } 11901da177e4SLinus Torvalds 11911da177e4SLinus Torvalds static int sel_fill_super(struct super_block * sb, void * data, int silent) 11921da177e4SLinus Torvalds { 11931da177e4SLinus Torvalds int ret; 11941da177e4SLinus Torvalds struct dentry *dentry; 11951da177e4SLinus Torvalds struct inode *inode; 11961da177e4SLinus Torvalds struct inode_security_struct *isec; 11971da177e4SLinus Torvalds 11981da177e4SLinus Torvalds static struct tree_descr selinux_files[] = { 11991da177e4SLinus Torvalds [SEL_LOAD] = {"load", &sel_load_ops, S_IRUSR|S_IWUSR}, 12001da177e4SLinus Torvalds [SEL_ENFORCE] = {"enforce", &sel_enforce_ops, S_IRUGO|S_IWUSR}, 1201ce9982d0SStephen Smalley [SEL_CONTEXT] = {"context", &transaction_ops, S_IRUGO|S_IWUGO}, 12021da177e4SLinus Torvalds [SEL_ACCESS] = {"access", &transaction_ops, S_IRUGO|S_IWUGO}, 12031da177e4SLinus Torvalds [SEL_CREATE] = {"create", &transaction_ops, S_IRUGO|S_IWUGO}, 12041da177e4SLinus Torvalds [SEL_RELABEL] = {"relabel", &transaction_ops, S_IRUGO|S_IWUGO}, 12051da177e4SLinus Torvalds [SEL_USER] = {"user", &transaction_ops, S_IRUGO|S_IWUGO}, 12061da177e4SLinus Torvalds [SEL_POLICYVERS] = {"policyvers", &sel_policyvers_ops, S_IRUGO}, 12071da177e4SLinus Torvalds [SEL_COMMIT_BOOLS] = {"commit_pending_bools", &sel_commit_bools_ops, S_IWUSR}, 12081da177e4SLinus Torvalds [SEL_MLS] = {"mls", &sel_mls_ops, S_IRUGO}, 12091da177e4SLinus Torvalds [SEL_DISABLE] = {"disable", &sel_disable_ops, S_IWUSR}, 12101da177e4SLinus Torvalds [SEL_MEMBER] = {"member", &transaction_ops, S_IRUGO|S_IWUGO}, 12111da177e4SLinus Torvalds [SEL_CHECKREQPROT] = {"checkreqprot", &sel_checkreqprot_ops, S_IRUGO|S_IWUSR}, 12121da177e4SLinus Torvalds /* last one */ {""} 12131da177e4SLinus Torvalds }; 12141da177e4SLinus Torvalds ret = simple_fill_super(sb, SELINUX_MAGIC, selinux_files); 12151da177e4SLinus Torvalds if (ret) 1216161ce45aSJames Morris goto err; 12171da177e4SLinus Torvalds 12181da177e4SLinus Torvalds dentry = d_alloc_name(sb->s_root, BOOL_DIR_NAME); 1219161ce45aSJames Morris if (!dentry) { 1220161ce45aSJames Morris ret = -ENOMEM; 1221161ce45aSJames Morris goto err; 1222161ce45aSJames Morris } 12231da177e4SLinus Torvalds 1224cde174a8SJames Morris ret = sel_make_dir(sb, dentry); 1225cde174a8SJames Morris if (ret) 1226161ce45aSJames Morris goto err; 1227cde174a8SJames Morris 12281da177e4SLinus Torvalds bool_dir = dentry; 12291da177e4SLinus Torvalds 12301da177e4SLinus Torvalds dentry = d_alloc_name(sb->s_root, NULL_FILE_NAME); 1231161ce45aSJames Morris if (!dentry) { 1232161ce45aSJames Morris ret = -ENOMEM; 1233161ce45aSJames Morris goto err; 1234161ce45aSJames Morris } 12351da177e4SLinus Torvalds 12361da177e4SLinus Torvalds inode = sel_make_inode(sb, S_IFCHR | S_IRUGO | S_IWUGO); 1237161ce45aSJames Morris if (!inode) { 1238161ce45aSJames Morris ret = -ENOMEM; 1239161ce45aSJames Morris goto err; 1240161ce45aSJames Morris } 12411da177e4SLinus Torvalds isec = (struct inode_security_struct*)inode->i_security; 12421da177e4SLinus Torvalds isec->sid = SECINITSID_DEVNULL; 12431da177e4SLinus Torvalds isec->sclass = SECCLASS_CHR_FILE; 12441da177e4SLinus Torvalds isec->initialized = 1; 12451da177e4SLinus Torvalds 12461da177e4SLinus Torvalds init_special_inode(inode, S_IFCHR | S_IRUGO | S_IWUGO, MKDEV(MEM_MAJOR, 3)); 12471da177e4SLinus Torvalds d_add(dentry, inode); 12481da177e4SLinus Torvalds selinux_null = dentry; 12491da177e4SLinus Torvalds 12501da177e4SLinus Torvalds dentry = d_alloc_name(sb->s_root, "avc"); 1251161ce45aSJames Morris if (!dentry) { 1252161ce45aSJames Morris ret = -ENOMEM; 1253161ce45aSJames Morris goto err; 1254161ce45aSJames Morris } 12551da177e4SLinus Torvalds 12561da177e4SLinus Torvalds ret = sel_make_dir(sb, dentry); 12571da177e4SLinus Torvalds if (ret) 1258161ce45aSJames Morris goto err; 12591da177e4SLinus Torvalds 12601da177e4SLinus Torvalds ret = sel_make_avc_files(dentry); 12611da177e4SLinus Torvalds if (ret) 1262161ce45aSJames Morris goto err; 12631da177e4SLinus Torvalds out: 1264161ce45aSJames Morris return ret; 1265161ce45aSJames Morris err: 12661da177e4SLinus Torvalds printk(KERN_ERR "%s: failed while creating inodes\n", __FUNCTION__); 1267161ce45aSJames Morris goto out; 12681da177e4SLinus Torvalds } 12691da177e4SLinus Torvalds 12701da177e4SLinus Torvalds static struct super_block *sel_get_sb(struct file_system_type *fs_type, 12711da177e4SLinus Torvalds int flags, const char *dev_name, void *data) 12721da177e4SLinus Torvalds { 12731da177e4SLinus Torvalds return get_sb_single(fs_type, flags, data, sel_fill_super); 12741da177e4SLinus Torvalds } 12751da177e4SLinus Torvalds 12761da177e4SLinus Torvalds static struct file_system_type sel_fs_type = { 12771da177e4SLinus Torvalds .name = "selinuxfs", 12781da177e4SLinus Torvalds .get_sb = sel_get_sb, 12791da177e4SLinus Torvalds .kill_sb = kill_litter_super, 12801da177e4SLinus Torvalds }; 12811da177e4SLinus Torvalds 12821da177e4SLinus Torvalds struct vfsmount *selinuxfs_mount; 12831da177e4SLinus Torvalds 12841da177e4SLinus Torvalds static int __init init_sel_fs(void) 12851da177e4SLinus Torvalds { 12861da177e4SLinus Torvalds int err; 12871da177e4SLinus Torvalds 12881da177e4SLinus Torvalds if (!selinux_enabled) 12891da177e4SLinus Torvalds return 0; 12901da177e4SLinus Torvalds err = register_filesystem(&sel_fs_type); 12911da177e4SLinus Torvalds if (!err) { 12921da177e4SLinus Torvalds selinuxfs_mount = kern_mount(&sel_fs_type); 12931da177e4SLinus Torvalds if (IS_ERR(selinuxfs_mount)) { 12941da177e4SLinus Torvalds printk(KERN_ERR "selinuxfs: could not mount!\n"); 12951da177e4SLinus Torvalds err = PTR_ERR(selinuxfs_mount); 12961da177e4SLinus Torvalds selinuxfs_mount = NULL; 12971da177e4SLinus Torvalds } 12981da177e4SLinus Torvalds } 12991da177e4SLinus Torvalds return err; 13001da177e4SLinus Torvalds } 13011da177e4SLinus Torvalds 13021da177e4SLinus Torvalds __initcall(init_sel_fs); 13031da177e4SLinus Torvalds 13041da177e4SLinus Torvalds #ifdef CONFIG_SECURITY_SELINUX_DISABLE 13051da177e4SLinus Torvalds void exit_sel_fs(void) 13061da177e4SLinus Torvalds { 13071da177e4SLinus Torvalds unregister_filesystem(&sel_fs_type); 13081da177e4SLinus Torvalds } 13091da177e4SLinus Torvalds #endif 1310