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/kernel.h> 131da177e4SLinus Torvalds #include <linux/pagemap.h> 141da177e4SLinus Torvalds #include <linux/slab.h> 151da177e4SLinus Torvalds #include <linux/vmalloc.h> 161da177e4SLinus Torvalds #include <linux/fs.h> 17bb003079SIngo Molnar #include <linux/mutex.h> 181da177e4SLinus Torvalds #include <linux/init.h> 191da177e4SLinus Torvalds #include <linux/string.h> 201da177e4SLinus Torvalds #include <linux/security.h> 211da177e4SLinus Torvalds #include <linux/major.h> 221da177e4SLinus Torvalds #include <linux/seq_file.h> 231da177e4SLinus Torvalds #include <linux/percpu.h> 24af601e46SSteve Grubb #include <linux/audit.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 404e5ab4cbSJames Morris #ifdef CONFIG_SECURITY_SELINUX_ENABLE_SECMARK_DEFAULT 414e5ab4cbSJames Morris #define SELINUX_COMPAT_NET_VALUE 0 424e5ab4cbSJames Morris #else 434e5ab4cbSJames Morris #define SELINUX_COMPAT_NET_VALUE 1 444e5ab4cbSJames Morris #endif 454e5ab4cbSJames Morris 464e5ab4cbSJames Morris int selinux_compat_net = SELINUX_COMPAT_NET_VALUE; 474e5ab4cbSJames Morris 481da177e4SLinus Torvalds static int __init checkreqprot_setup(char *str) 491da177e4SLinus Torvalds { 501da177e4SLinus Torvalds selinux_checkreqprot = simple_strtoul(str,NULL,0) ? 1 : 0; 511da177e4SLinus Torvalds return 1; 521da177e4SLinus Torvalds } 531da177e4SLinus Torvalds __setup("checkreqprot=", checkreqprot_setup); 541da177e4SLinus Torvalds 554e5ab4cbSJames Morris static int __init selinux_compat_net_setup(char *str) 564e5ab4cbSJames Morris { 574e5ab4cbSJames Morris selinux_compat_net = simple_strtoul(str,NULL,0) ? 1 : 0; 584e5ab4cbSJames Morris return 1; 594e5ab4cbSJames Morris } 604e5ab4cbSJames Morris __setup("selinux_compat_net=", selinux_compat_net_setup); 614e5ab4cbSJames Morris 621da177e4SLinus Torvalds 63bb003079SIngo Molnar static DEFINE_MUTEX(sel_mutex); 641da177e4SLinus Torvalds 651da177e4SLinus Torvalds /* global data for booleans */ 661da177e4SLinus Torvalds static struct dentry *bool_dir = NULL; 671da177e4SLinus Torvalds static int bool_num = 0; 681da177e4SLinus Torvalds static int *bool_pending_values = NULL; 691da177e4SLinus Torvalds 701da177e4SLinus Torvalds extern void selnl_notify_setenforce(int val); 711da177e4SLinus Torvalds 721da177e4SLinus Torvalds /* Check whether a task is allowed to use a security operation. */ 731da177e4SLinus Torvalds static int task_has_security(struct task_struct *tsk, 741da177e4SLinus Torvalds u32 perms) 751da177e4SLinus Torvalds { 761da177e4SLinus Torvalds struct task_security_struct *tsec; 771da177e4SLinus Torvalds 781da177e4SLinus Torvalds tsec = tsk->security; 791da177e4SLinus Torvalds if (!tsec) 801da177e4SLinus Torvalds return -EACCES; 811da177e4SLinus Torvalds 821da177e4SLinus Torvalds return avc_has_perm(tsec->sid, SECINITSID_SECURITY, 831da177e4SLinus Torvalds SECCLASS_SECURITY, perms, NULL); 841da177e4SLinus Torvalds } 851da177e4SLinus Torvalds 861da177e4SLinus Torvalds enum sel_inos { 871da177e4SLinus Torvalds SEL_ROOT_INO = 2, 881da177e4SLinus Torvalds SEL_LOAD, /* load policy */ 891da177e4SLinus Torvalds SEL_ENFORCE, /* get or set enforcing status */ 901da177e4SLinus Torvalds SEL_CONTEXT, /* validate context */ 911da177e4SLinus Torvalds SEL_ACCESS, /* compute access decision */ 921da177e4SLinus Torvalds SEL_CREATE, /* compute create labeling decision */ 931da177e4SLinus Torvalds SEL_RELABEL, /* compute relabeling decision */ 941da177e4SLinus Torvalds SEL_USER, /* compute reachable user contexts */ 951da177e4SLinus Torvalds SEL_POLICYVERS, /* return policy version for this kernel */ 961da177e4SLinus Torvalds SEL_COMMIT_BOOLS, /* commit new boolean values */ 971da177e4SLinus Torvalds SEL_MLS, /* return if MLS policy is enabled */ 981da177e4SLinus Torvalds SEL_DISABLE, /* disable SELinux until next reboot */ 991da177e4SLinus Torvalds SEL_AVC, /* AVC management directory */ 1001da177e4SLinus Torvalds SEL_MEMBER, /* compute polyinstantiation membership decision */ 1011da177e4SLinus Torvalds SEL_CHECKREQPROT, /* check requested protection, not kernel-applied one */ 1024e5ab4cbSJames Morris SEL_COMPAT_NET, /* whether to use old compat network packet controls */ 1031da177e4SLinus Torvalds }; 1041da177e4SLinus Torvalds 105f0ee2e46SJames Carter #define SEL_INITCON_INO_OFFSET 0x01000000 106f0ee2e46SJames Carter #define SEL_INO_MASK 0x00ffffff 107f0ee2e46SJames Carter 1081da177e4SLinus Torvalds #define TMPBUFLEN 12 1091da177e4SLinus Torvalds static ssize_t sel_read_enforce(struct file *filp, char __user *buf, 1101da177e4SLinus Torvalds size_t count, loff_t *ppos) 1111da177e4SLinus Torvalds { 1121da177e4SLinus Torvalds char tmpbuf[TMPBUFLEN]; 1131da177e4SLinus Torvalds ssize_t length; 1141da177e4SLinus Torvalds 1151da177e4SLinus Torvalds length = scnprintf(tmpbuf, TMPBUFLEN, "%d", selinux_enforcing); 1161da177e4SLinus Torvalds return simple_read_from_buffer(buf, count, ppos, tmpbuf, length); 1171da177e4SLinus Torvalds } 1181da177e4SLinus Torvalds 1191da177e4SLinus Torvalds #ifdef CONFIG_SECURITY_SELINUX_DEVELOP 1201da177e4SLinus Torvalds static ssize_t sel_write_enforce(struct file * file, const char __user * buf, 1211da177e4SLinus Torvalds size_t count, loff_t *ppos) 1221da177e4SLinus Torvalds 1231da177e4SLinus Torvalds { 1241da177e4SLinus Torvalds char *page; 1251da177e4SLinus Torvalds ssize_t length; 1261da177e4SLinus Torvalds int new_value; 1271da177e4SLinus Torvalds 128bfd51626SDavi Arnaut if (count >= PAGE_SIZE) 1291da177e4SLinus Torvalds return -ENOMEM; 1301da177e4SLinus Torvalds if (*ppos != 0) { 1311da177e4SLinus Torvalds /* No partial writes. */ 1321da177e4SLinus Torvalds return -EINVAL; 1331da177e4SLinus Torvalds } 1341da177e4SLinus Torvalds page = (char*)get_zeroed_page(GFP_KERNEL); 1351da177e4SLinus Torvalds if (!page) 1361da177e4SLinus Torvalds return -ENOMEM; 1371da177e4SLinus Torvalds length = -EFAULT; 1381da177e4SLinus Torvalds if (copy_from_user(page, buf, count)) 1391da177e4SLinus Torvalds goto out; 1401da177e4SLinus Torvalds 1411da177e4SLinus Torvalds length = -EINVAL; 1421da177e4SLinus Torvalds if (sscanf(page, "%d", &new_value) != 1) 1431da177e4SLinus Torvalds goto out; 1441da177e4SLinus Torvalds 1451da177e4SLinus Torvalds if (new_value != selinux_enforcing) { 1461da177e4SLinus Torvalds length = task_has_security(current, SECURITY__SETENFORCE); 1471da177e4SLinus Torvalds if (length) 1481da177e4SLinus Torvalds goto out; 149af601e46SSteve Grubb audit_log(current->audit_context, GFP_KERNEL, AUDIT_MAC_STATUS, 150af601e46SSteve Grubb "enforcing=%d old_enforcing=%d auid=%u", new_value, 151af601e46SSteve Grubb selinux_enforcing, 152af601e46SSteve Grubb audit_get_loginuid(current->audit_context)); 1531da177e4SLinus Torvalds selinux_enforcing = new_value; 1541da177e4SLinus Torvalds if (selinux_enforcing) 1551da177e4SLinus Torvalds avc_ss_reset(0); 1561da177e4SLinus Torvalds selnl_notify_setenforce(selinux_enforcing); 1571da177e4SLinus Torvalds } 1581da177e4SLinus Torvalds length = count; 1591da177e4SLinus Torvalds out: 1601da177e4SLinus Torvalds free_page((unsigned long) page); 1611da177e4SLinus Torvalds return length; 1621da177e4SLinus Torvalds } 1631da177e4SLinus Torvalds #else 1641da177e4SLinus Torvalds #define sel_write_enforce NULL 1651da177e4SLinus Torvalds #endif 1661da177e4SLinus Torvalds 1679c2e08c5SArjan van de Ven static const struct file_operations sel_enforce_ops = { 1681da177e4SLinus Torvalds .read = sel_read_enforce, 1691da177e4SLinus Torvalds .write = sel_write_enforce, 1701da177e4SLinus Torvalds }; 1711da177e4SLinus Torvalds 1721da177e4SLinus Torvalds #ifdef CONFIG_SECURITY_SELINUX_DISABLE 1731da177e4SLinus Torvalds static ssize_t sel_write_disable(struct file * file, const char __user * buf, 1741da177e4SLinus Torvalds size_t count, loff_t *ppos) 1751da177e4SLinus Torvalds 1761da177e4SLinus Torvalds { 1771da177e4SLinus Torvalds char *page; 1781da177e4SLinus Torvalds ssize_t length; 1791da177e4SLinus Torvalds int new_value; 1801da177e4SLinus Torvalds extern int selinux_disable(void); 1811da177e4SLinus Torvalds 182bfd51626SDavi Arnaut if (count >= PAGE_SIZE) 1831da177e4SLinus Torvalds return -ENOMEM; 1841da177e4SLinus Torvalds if (*ppos != 0) { 1851da177e4SLinus Torvalds /* No partial writes. */ 1861da177e4SLinus Torvalds return -EINVAL; 1871da177e4SLinus Torvalds } 1881da177e4SLinus Torvalds page = (char*)get_zeroed_page(GFP_KERNEL); 1891da177e4SLinus Torvalds if (!page) 1901da177e4SLinus Torvalds return -ENOMEM; 1911da177e4SLinus Torvalds length = -EFAULT; 1921da177e4SLinus Torvalds if (copy_from_user(page, buf, count)) 1931da177e4SLinus Torvalds goto out; 1941da177e4SLinus Torvalds 1951da177e4SLinus Torvalds length = -EINVAL; 1961da177e4SLinus Torvalds if (sscanf(page, "%d", &new_value) != 1) 1971da177e4SLinus Torvalds goto out; 1981da177e4SLinus Torvalds 1991da177e4SLinus Torvalds if (new_value) { 2001da177e4SLinus Torvalds length = selinux_disable(); 2011da177e4SLinus Torvalds if (length < 0) 2021da177e4SLinus Torvalds goto out; 203af601e46SSteve Grubb audit_log(current->audit_context, GFP_KERNEL, AUDIT_MAC_STATUS, 204af601e46SSteve Grubb "selinux=0 auid=%u", 205af601e46SSteve Grubb audit_get_loginuid(current->audit_context)); 2061da177e4SLinus Torvalds } 2071da177e4SLinus Torvalds 2081da177e4SLinus Torvalds length = count; 2091da177e4SLinus Torvalds out: 2101da177e4SLinus Torvalds free_page((unsigned long) page); 2111da177e4SLinus Torvalds return length; 2121da177e4SLinus Torvalds } 2131da177e4SLinus Torvalds #else 2141da177e4SLinus Torvalds #define sel_write_disable NULL 2151da177e4SLinus Torvalds #endif 2161da177e4SLinus Torvalds 2179c2e08c5SArjan van de Ven static const struct file_operations sel_disable_ops = { 2181da177e4SLinus Torvalds .write = sel_write_disable, 2191da177e4SLinus Torvalds }; 2201da177e4SLinus Torvalds 2211da177e4SLinus Torvalds static ssize_t sel_read_policyvers(struct file *filp, char __user *buf, 2221da177e4SLinus Torvalds size_t count, loff_t *ppos) 2231da177e4SLinus Torvalds { 2241da177e4SLinus Torvalds char tmpbuf[TMPBUFLEN]; 2251da177e4SLinus Torvalds ssize_t length; 2261da177e4SLinus Torvalds 2271da177e4SLinus Torvalds length = scnprintf(tmpbuf, TMPBUFLEN, "%u", POLICYDB_VERSION_MAX); 2281da177e4SLinus Torvalds return simple_read_from_buffer(buf, count, ppos, tmpbuf, length); 2291da177e4SLinus Torvalds } 2301da177e4SLinus Torvalds 2319c2e08c5SArjan van de Ven static const struct file_operations sel_policyvers_ops = { 2321da177e4SLinus Torvalds .read = sel_read_policyvers, 2331da177e4SLinus Torvalds }; 2341da177e4SLinus Torvalds 2351da177e4SLinus Torvalds /* declaration for sel_write_load */ 2361da177e4SLinus Torvalds static int sel_make_bools(void); 2371da177e4SLinus Torvalds 2381da177e4SLinus Torvalds static ssize_t sel_read_mls(struct file *filp, char __user *buf, 2391da177e4SLinus Torvalds size_t count, loff_t *ppos) 2401da177e4SLinus Torvalds { 2411da177e4SLinus Torvalds char tmpbuf[TMPBUFLEN]; 2421da177e4SLinus Torvalds ssize_t length; 2431da177e4SLinus Torvalds 2441da177e4SLinus Torvalds length = scnprintf(tmpbuf, TMPBUFLEN, "%d", selinux_mls_enabled); 2451da177e4SLinus Torvalds return simple_read_from_buffer(buf, count, ppos, tmpbuf, length); 2461da177e4SLinus Torvalds } 2471da177e4SLinus Torvalds 2489c2e08c5SArjan van de Ven static const struct file_operations sel_mls_ops = { 2491da177e4SLinus Torvalds .read = sel_read_mls, 2501da177e4SLinus Torvalds }; 2511da177e4SLinus Torvalds 2521da177e4SLinus Torvalds static ssize_t sel_write_load(struct file * file, const char __user * buf, 2531da177e4SLinus Torvalds size_t count, loff_t *ppos) 2541da177e4SLinus Torvalds 2551da177e4SLinus Torvalds { 2561da177e4SLinus Torvalds int ret; 2571da177e4SLinus Torvalds ssize_t length; 2581da177e4SLinus Torvalds void *data = NULL; 2591da177e4SLinus Torvalds 260bb003079SIngo Molnar mutex_lock(&sel_mutex); 2611da177e4SLinus Torvalds 2621da177e4SLinus Torvalds length = task_has_security(current, SECURITY__LOAD_POLICY); 2631da177e4SLinus Torvalds if (length) 2641da177e4SLinus Torvalds goto out; 2651da177e4SLinus Torvalds 2661da177e4SLinus Torvalds if (*ppos != 0) { 2671da177e4SLinus Torvalds /* No partial writes. */ 2681da177e4SLinus Torvalds length = -EINVAL; 2691da177e4SLinus Torvalds goto out; 2701da177e4SLinus Torvalds } 2711da177e4SLinus Torvalds 272bfd51626SDavi Arnaut if ((count > 64 * 1024 * 1024) 2731da177e4SLinus Torvalds || (data = vmalloc(count)) == NULL) { 2741da177e4SLinus Torvalds length = -ENOMEM; 2751da177e4SLinus Torvalds goto out; 2761da177e4SLinus Torvalds } 2771da177e4SLinus Torvalds 2781da177e4SLinus Torvalds length = -EFAULT; 2791da177e4SLinus Torvalds if (copy_from_user(data, buf, count) != 0) 2801da177e4SLinus Torvalds goto out; 2811da177e4SLinus Torvalds 2821da177e4SLinus Torvalds length = security_load_policy(data, count); 2831da177e4SLinus Torvalds if (length) 2841da177e4SLinus Torvalds goto out; 2851da177e4SLinus Torvalds 2861da177e4SLinus Torvalds ret = sel_make_bools(); 2871da177e4SLinus Torvalds if (ret) 2881da177e4SLinus Torvalds length = ret; 2891da177e4SLinus Torvalds else 2901da177e4SLinus Torvalds length = count; 291af601e46SSteve Grubb audit_log(current->audit_context, GFP_KERNEL, AUDIT_MAC_POLICY_LOAD, 292af601e46SSteve Grubb "policy loaded auid=%u", 293af601e46SSteve Grubb audit_get_loginuid(current->audit_context)); 2941da177e4SLinus Torvalds out: 295bb003079SIngo Molnar mutex_unlock(&sel_mutex); 2961da177e4SLinus Torvalds vfree(data); 2971da177e4SLinus Torvalds return length; 2981da177e4SLinus Torvalds } 2991da177e4SLinus Torvalds 3009c2e08c5SArjan van de Ven static const struct file_operations sel_load_ops = { 3011da177e4SLinus Torvalds .write = sel_write_load, 3021da177e4SLinus Torvalds }; 3031da177e4SLinus Torvalds 304ce9982d0SStephen Smalley static ssize_t sel_write_context(struct file * file, char *buf, size_t size) 3051da177e4SLinus Torvalds { 306ce9982d0SStephen Smalley char *canon; 307ce9982d0SStephen Smalley u32 sid, len; 3081da177e4SLinus Torvalds ssize_t length; 3091da177e4SLinus Torvalds 3101da177e4SLinus Torvalds length = task_has_security(current, SECURITY__CHECK_CONTEXT); 3111da177e4SLinus Torvalds if (length) 3121da177e4SLinus Torvalds return length; 3131da177e4SLinus Torvalds 314ce9982d0SStephen Smalley length = security_context_to_sid(buf, size, &sid); 3151da177e4SLinus Torvalds if (length < 0) 316ce9982d0SStephen Smalley return length; 3171da177e4SLinus Torvalds 318ce9982d0SStephen Smalley length = security_sid_to_context(sid, &canon, &len); 319ce9982d0SStephen Smalley if (length < 0) 320ce9982d0SStephen Smalley return length; 321ce9982d0SStephen Smalley 322ce9982d0SStephen Smalley if (len > SIMPLE_TRANSACTION_LIMIT) { 323ce9982d0SStephen Smalley printk(KERN_ERR "%s: context size (%u) exceeds payload " 324ce9982d0SStephen Smalley "max\n", __FUNCTION__, len); 325ce9982d0SStephen Smalley length = -ERANGE; 326ce9982d0SStephen Smalley goto out; 327ce9982d0SStephen Smalley } 328ce9982d0SStephen Smalley 329ce9982d0SStephen Smalley memcpy(buf, canon, len); 330ce9982d0SStephen Smalley length = len; 3311da177e4SLinus Torvalds out: 332ce9982d0SStephen Smalley kfree(canon); 3331da177e4SLinus Torvalds return length; 3341da177e4SLinus Torvalds } 3351da177e4SLinus Torvalds 3361da177e4SLinus Torvalds static ssize_t sel_read_checkreqprot(struct file *filp, char __user *buf, 3371da177e4SLinus Torvalds size_t count, loff_t *ppos) 3381da177e4SLinus Torvalds { 3391da177e4SLinus Torvalds char tmpbuf[TMPBUFLEN]; 3401da177e4SLinus Torvalds ssize_t length; 3411da177e4SLinus Torvalds 3421da177e4SLinus Torvalds length = scnprintf(tmpbuf, TMPBUFLEN, "%u", selinux_checkreqprot); 3431da177e4SLinus Torvalds return simple_read_from_buffer(buf, count, ppos, tmpbuf, length); 3441da177e4SLinus Torvalds } 3451da177e4SLinus Torvalds 3461da177e4SLinus Torvalds static ssize_t sel_write_checkreqprot(struct file * file, const char __user * buf, 3471da177e4SLinus Torvalds size_t count, loff_t *ppos) 3481da177e4SLinus Torvalds { 3491da177e4SLinus Torvalds char *page; 3501da177e4SLinus Torvalds ssize_t length; 3511da177e4SLinus Torvalds unsigned int new_value; 3521da177e4SLinus Torvalds 3531da177e4SLinus Torvalds length = task_has_security(current, SECURITY__SETCHECKREQPROT); 3541da177e4SLinus Torvalds if (length) 3551da177e4SLinus Torvalds return length; 3561da177e4SLinus Torvalds 357bfd51626SDavi Arnaut if (count >= PAGE_SIZE) 3581da177e4SLinus Torvalds return -ENOMEM; 3591da177e4SLinus Torvalds if (*ppos != 0) { 3601da177e4SLinus Torvalds /* No partial writes. */ 3611da177e4SLinus Torvalds return -EINVAL; 3621da177e4SLinus Torvalds } 3631da177e4SLinus Torvalds page = (char*)get_zeroed_page(GFP_KERNEL); 3641da177e4SLinus Torvalds if (!page) 3651da177e4SLinus Torvalds return -ENOMEM; 3661da177e4SLinus Torvalds length = -EFAULT; 3671da177e4SLinus Torvalds if (copy_from_user(page, buf, count)) 3681da177e4SLinus Torvalds goto out; 3691da177e4SLinus Torvalds 3701da177e4SLinus Torvalds length = -EINVAL; 3711da177e4SLinus Torvalds if (sscanf(page, "%u", &new_value) != 1) 3721da177e4SLinus Torvalds goto out; 3731da177e4SLinus Torvalds 3741da177e4SLinus Torvalds selinux_checkreqprot = new_value ? 1 : 0; 3751da177e4SLinus Torvalds length = count; 3761da177e4SLinus Torvalds out: 3771da177e4SLinus Torvalds free_page((unsigned long) page); 3781da177e4SLinus Torvalds return length; 3791da177e4SLinus Torvalds } 3809c2e08c5SArjan van de Ven static const struct file_operations sel_checkreqprot_ops = { 3811da177e4SLinus Torvalds .read = sel_read_checkreqprot, 3821da177e4SLinus Torvalds .write = sel_write_checkreqprot, 3831da177e4SLinus Torvalds }; 3841da177e4SLinus Torvalds 3854e5ab4cbSJames Morris static ssize_t sel_read_compat_net(struct file *filp, char __user *buf, 3864e5ab4cbSJames Morris size_t count, loff_t *ppos) 3874e5ab4cbSJames Morris { 3884e5ab4cbSJames Morris char tmpbuf[TMPBUFLEN]; 3894e5ab4cbSJames Morris ssize_t length; 3904e5ab4cbSJames Morris 3914e5ab4cbSJames Morris length = scnprintf(tmpbuf, TMPBUFLEN, "%d", selinux_compat_net); 3924e5ab4cbSJames Morris return simple_read_from_buffer(buf, count, ppos, tmpbuf, length); 3934e5ab4cbSJames Morris } 3944e5ab4cbSJames Morris 3954e5ab4cbSJames Morris static ssize_t sel_write_compat_net(struct file * file, const char __user * buf, 3964e5ab4cbSJames Morris size_t count, loff_t *ppos) 3974e5ab4cbSJames Morris { 3984e5ab4cbSJames Morris char *page; 3994e5ab4cbSJames Morris ssize_t length; 4004e5ab4cbSJames Morris int new_value; 4014e5ab4cbSJames Morris 4024e5ab4cbSJames Morris length = task_has_security(current, SECURITY__LOAD_POLICY); 4034e5ab4cbSJames Morris if (length) 4044e5ab4cbSJames Morris return length; 4054e5ab4cbSJames Morris 4064e5ab4cbSJames Morris if (count >= PAGE_SIZE) 4074e5ab4cbSJames Morris return -ENOMEM; 4084e5ab4cbSJames Morris if (*ppos != 0) { 4094e5ab4cbSJames Morris /* No partial writes. */ 4104e5ab4cbSJames Morris return -EINVAL; 4114e5ab4cbSJames Morris } 4124e5ab4cbSJames Morris page = (char*)get_zeroed_page(GFP_KERNEL); 4134e5ab4cbSJames Morris if (!page) 4144e5ab4cbSJames Morris return -ENOMEM; 4154e5ab4cbSJames Morris length = -EFAULT; 4164e5ab4cbSJames Morris if (copy_from_user(page, buf, count)) 4174e5ab4cbSJames Morris goto out; 4184e5ab4cbSJames Morris 4194e5ab4cbSJames Morris length = -EINVAL; 4204e5ab4cbSJames Morris if (sscanf(page, "%d", &new_value) != 1) 4214e5ab4cbSJames Morris goto out; 4224e5ab4cbSJames Morris 4234e5ab4cbSJames Morris selinux_compat_net = new_value ? 1 : 0; 4244e5ab4cbSJames Morris length = count; 4254e5ab4cbSJames Morris out: 4264e5ab4cbSJames Morris free_page((unsigned long) page); 4274e5ab4cbSJames Morris return length; 4284e5ab4cbSJames Morris } 4299c2e08c5SArjan van de Ven static const struct file_operations sel_compat_net_ops = { 4304e5ab4cbSJames Morris .read = sel_read_compat_net, 4314e5ab4cbSJames Morris .write = sel_write_compat_net, 4324e5ab4cbSJames Morris }; 4334e5ab4cbSJames Morris 4341da177e4SLinus Torvalds /* 4351da177e4SLinus Torvalds * Remaining nodes use transaction based IO methods like nfsd/nfsctl.c 4361da177e4SLinus Torvalds */ 4371da177e4SLinus Torvalds static ssize_t sel_write_access(struct file * file, char *buf, size_t size); 4381da177e4SLinus Torvalds static ssize_t sel_write_create(struct file * file, char *buf, size_t size); 4391da177e4SLinus Torvalds static ssize_t sel_write_relabel(struct file * file, char *buf, size_t size); 4401da177e4SLinus Torvalds static ssize_t sel_write_user(struct file * file, char *buf, size_t size); 4411da177e4SLinus Torvalds static ssize_t sel_write_member(struct file * file, char *buf, size_t size); 4421da177e4SLinus Torvalds 4431da177e4SLinus Torvalds static ssize_t (*write_op[])(struct file *, char *, size_t) = { 4441da177e4SLinus Torvalds [SEL_ACCESS] = sel_write_access, 4451da177e4SLinus Torvalds [SEL_CREATE] = sel_write_create, 4461da177e4SLinus Torvalds [SEL_RELABEL] = sel_write_relabel, 4471da177e4SLinus Torvalds [SEL_USER] = sel_write_user, 4481da177e4SLinus Torvalds [SEL_MEMBER] = sel_write_member, 449ce9982d0SStephen Smalley [SEL_CONTEXT] = sel_write_context, 4501da177e4SLinus Torvalds }; 4511da177e4SLinus Torvalds 4521da177e4SLinus Torvalds static ssize_t selinux_transaction_write(struct file *file, const char __user *buf, size_t size, loff_t *pos) 4531da177e4SLinus Torvalds { 4543d5ff529SJosef Sipek ino_t ino = file->f_path.dentry->d_inode->i_ino; 4551da177e4SLinus Torvalds char *data; 4561da177e4SLinus Torvalds ssize_t rv; 4571da177e4SLinus Torvalds 4586e20a64aSNicolas Kaiser if (ino >= ARRAY_SIZE(write_op) || !write_op[ino]) 4591da177e4SLinus Torvalds return -EINVAL; 4601da177e4SLinus Torvalds 4611da177e4SLinus Torvalds data = simple_transaction_get(file, buf, size); 4621da177e4SLinus Torvalds if (IS_ERR(data)) 4631da177e4SLinus Torvalds return PTR_ERR(data); 4641da177e4SLinus Torvalds 4651da177e4SLinus Torvalds rv = write_op[ino](file, data, size); 4661da177e4SLinus Torvalds if (rv>0) { 4671da177e4SLinus Torvalds simple_transaction_set(file, rv); 4681da177e4SLinus Torvalds rv = size; 4691da177e4SLinus Torvalds } 4701da177e4SLinus Torvalds return rv; 4711da177e4SLinus Torvalds } 4721da177e4SLinus Torvalds 4739c2e08c5SArjan van de Ven static const struct file_operations transaction_ops = { 4741da177e4SLinus Torvalds .write = selinux_transaction_write, 4751da177e4SLinus Torvalds .read = simple_transaction_read, 4761da177e4SLinus Torvalds .release = simple_transaction_release, 4771da177e4SLinus Torvalds }; 4781da177e4SLinus Torvalds 4791da177e4SLinus Torvalds /* 4801da177e4SLinus Torvalds * payload - write methods 4811da177e4SLinus Torvalds * If the method has a response, the response should be put in buf, 4821da177e4SLinus Torvalds * and the length returned. Otherwise return 0 or and -error. 4831da177e4SLinus Torvalds */ 4841da177e4SLinus Torvalds 4851da177e4SLinus Torvalds static ssize_t sel_write_access(struct file * file, char *buf, size_t size) 4861da177e4SLinus Torvalds { 4871da177e4SLinus Torvalds char *scon, *tcon; 4881da177e4SLinus Torvalds u32 ssid, tsid; 4891da177e4SLinus Torvalds u16 tclass; 4901da177e4SLinus Torvalds u32 req; 4911da177e4SLinus Torvalds struct av_decision avd; 4921da177e4SLinus Torvalds ssize_t length; 4931da177e4SLinus Torvalds 4941da177e4SLinus Torvalds length = task_has_security(current, SECURITY__COMPUTE_AV); 4951da177e4SLinus Torvalds if (length) 4961da177e4SLinus Torvalds return length; 4971da177e4SLinus Torvalds 4981da177e4SLinus Torvalds length = -ENOMEM; 49989d155efSJames Morris scon = kzalloc(size+1, GFP_KERNEL); 5001da177e4SLinus Torvalds if (!scon) 5011da177e4SLinus Torvalds return length; 5021da177e4SLinus Torvalds 50389d155efSJames Morris tcon = kzalloc(size+1, GFP_KERNEL); 5041da177e4SLinus Torvalds if (!tcon) 5051da177e4SLinus Torvalds goto out; 5061da177e4SLinus Torvalds 5071da177e4SLinus Torvalds length = -EINVAL; 5081da177e4SLinus Torvalds if (sscanf(buf, "%s %s %hu %x", scon, tcon, &tclass, &req) != 4) 5091da177e4SLinus Torvalds goto out2; 5101da177e4SLinus Torvalds 5111da177e4SLinus Torvalds length = security_context_to_sid(scon, strlen(scon)+1, &ssid); 5121da177e4SLinus Torvalds if (length < 0) 5131da177e4SLinus Torvalds goto out2; 5141da177e4SLinus Torvalds length = security_context_to_sid(tcon, strlen(tcon)+1, &tsid); 5151da177e4SLinus Torvalds if (length < 0) 5161da177e4SLinus Torvalds goto out2; 5171da177e4SLinus Torvalds 5181da177e4SLinus Torvalds length = security_compute_av(ssid, tsid, tclass, req, &avd); 5191da177e4SLinus Torvalds if (length < 0) 5201da177e4SLinus Torvalds goto out2; 5211da177e4SLinus Torvalds 5221da177e4SLinus Torvalds length = scnprintf(buf, SIMPLE_TRANSACTION_LIMIT, 5231da177e4SLinus Torvalds "%x %x %x %x %u", 5241da177e4SLinus Torvalds avd.allowed, avd.decided, 5251da177e4SLinus Torvalds avd.auditallow, avd.auditdeny, 5261da177e4SLinus Torvalds avd.seqno); 5271da177e4SLinus Torvalds out2: 5281da177e4SLinus Torvalds kfree(tcon); 5291da177e4SLinus Torvalds out: 5301da177e4SLinus Torvalds kfree(scon); 5311da177e4SLinus Torvalds return length; 5321da177e4SLinus Torvalds } 5331da177e4SLinus Torvalds 5341da177e4SLinus Torvalds static ssize_t sel_write_create(struct file * file, char *buf, size_t size) 5351da177e4SLinus Torvalds { 5361da177e4SLinus Torvalds char *scon, *tcon; 5371da177e4SLinus Torvalds u32 ssid, tsid, newsid; 5381da177e4SLinus Torvalds u16 tclass; 5391da177e4SLinus Torvalds ssize_t length; 5401da177e4SLinus Torvalds char *newcon; 5411da177e4SLinus Torvalds u32 len; 5421da177e4SLinus Torvalds 5431da177e4SLinus Torvalds length = task_has_security(current, SECURITY__COMPUTE_CREATE); 5441da177e4SLinus Torvalds if (length) 5451da177e4SLinus Torvalds return length; 5461da177e4SLinus Torvalds 5471da177e4SLinus Torvalds length = -ENOMEM; 54889d155efSJames Morris scon = kzalloc(size+1, GFP_KERNEL); 5491da177e4SLinus Torvalds if (!scon) 5501da177e4SLinus Torvalds return length; 5511da177e4SLinus Torvalds 55289d155efSJames Morris tcon = kzalloc(size+1, GFP_KERNEL); 5531da177e4SLinus Torvalds if (!tcon) 5541da177e4SLinus Torvalds goto out; 5551da177e4SLinus Torvalds 5561da177e4SLinus Torvalds length = -EINVAL; 5571da177e4SLinus Torvalds if (sscanf(buf, "%s %s %hu", scon, tcon, &tclass) != 3) 5581da177e4SLinus Torvalds goto out2; 5591da177e4SLinus Torvalds 5601da177e4SLinus Torvalds length = security_context_to_sid(scon, strlen(scon)+1, &ssid); 5611da177e4SLinus Torvalds if (length < 0) 5621da177e4SLinus Torvalds goto out2; 5631da177e4SLinus Torvalds length = security_context_to_sid(tcon, strlen(tcon)+1, &tsid); 5641da177e4SLinus Torvalds if (length < 0) 5651da177e4SLinus Torvalds goto out2; 5661da177e4SLinus Torvalds 5671da177e4SLinus Torvalds length = security_transition_sid(ssid, tsid, tclass, &newsid); 5681da177e4SLinus Torvalds if (length < 0) 5691da177e4SLinus Torvalds goto out2; 5701da177e4SLinus Torvalds 5711da177e4SLinus Torvalds length = security_sid_to_context(newsid, &newcon, &len); 5721da177e4SLinus Torvalds if (length < 0) 5731da177e4SLinus Torvalds goto out2; 5741da177e4SLinus Torvalds 5751da177e4SLinus Torvalds if (len > SIMPLE_TRANSACTION_LIMIT) { 5761da177e4SLinus Torvalds printk(KERN_ERR "%s: context size (%u) exceeds payload " 5771da177e4SLinus Torvalds "max\n", __FUNCTION__, len); 5781da177e4SLinus Torvalds length = -ERANGE; 5791da177e4SLinus Torvalds goto out3; 5801da177e4SLinus Torvalds } 5811da177e4SLinus Torvalds 5821da177e4SLinus Torvalds memcpy(buf, newcon, len); 5831da177e4SLinus Torvalds length = len; 5841da177e4SLinus Torvalds out3: 5851da177e4SLinus Torvalds kfree(newcon); 5861da177e4SLinus Torvalds out2: 5871da177e4SLinus Torvalds kfree(tcon); 5881da177e4SLinus Torvalds out: 5891da177e4SLinus Torvalds kfree(scon); 5901da177e4SLinus Torvalds return length; 5911da177e4SLinus Torvalds } 5921da177e4SLinus Torvalds 5931da177e4SLinus Torvalds static ssize_t sel_write_relabel(struct file * file, char *buf, size_t size) 5941da177e4SLinus Torvalds { 5951da177e4SLinus Torvalds char *scon, *tcon; 5961da177e4SLinus Torvalds u32 ssid, tsid, newsid; 5971da177e4SLinus Torvalds u16 tclass; 5981da177e4SLinus Torvalds ssize_t length; 5991da177e4SLinus Torvalds char *newcon; 6001da177e4SLinus Torvalds u32 len; 6011da177e4SLinus Torvalds 6021da177e4SLinus Torvalds length = task_has_security(current, SECURITY__COMPUTE_RELABEL); 6031da177e4SLinus Torvalds if (length) 6041da177e4SLinus Torvalds return length; 6051da177e4SLinus Torvalds 6061da177e4SLinus Torvalds length = -ENOMEM; 60789d155efSJames Morris scon = kzalloc(size+1, GFP_KERNEL); 6081da177e4SLinus Torvalds if (!scon) 6091da177e4SLinus Torvalds return length; 6101da177e4SLinus Torvalds 61189d155efSJames Morris tcon = kzalloc(size+1, GFP_KERNEL); 6121da177e4SLinus Torvalds if (!tcon) 6131da177e4SLinus Torvalds goto out; 6141da177e4SLinus Torvalds 6151da177e4SLinus Torvalds length = -EINVAL; 6161da177e4SLinus Torvalds if (sscanf(buf, "%s %s %hu", scon, tcon, &tclass) != 3) 6171da177e4SLinus Torvalds goto out2; 6181da177e4SLinus Torvalds 6191da177e4SLinus Torvalds length = security_context_to_sid(scon, strlen(scon)+1, &ssid); 6201da177e4SLinus Torvalds if (length < 0) 6211da177e4SLinus Torvalds goto out2; 6221da177e4SLinus Torvalds length = security_context_to_sid(tcon, strlen(tcon)+1, &tsid); 6231da177e4SLinus Torvalds if (length < 0) 6241da177e4SLinus Torvalds goto out2; 6251da177e4SLinus Torvalds 6261da177e4SLinus Torvalds length = security_change_sid(ssid, tsid, tclass, &newsid); 6271da177e4SLinus Torvalds if (length < 0) 6281da177e4SLinus Torvalds goto out2; 6291da177e4SLinus Torvalds 6301da177e4SLinus Torvalds length = security_sid_to_context(newsid, &newcon, &len); 6311da177e4SLinus Torvalds if (length < 0) 6321da177e4SLinus Torvalds goto out2; 6331da177e4SLinus Torvalds 6341da177e4SLinus Torvalds if (len > SIMPLE_TRANSACTION_LIMIT) { 6351da177e4SLinus Torvalds length = -ERANGE; 6361da177e4SLinus Torvalds goto out3; 6371da177e4SLinus Torvalds } 6381da177e4SLinus Torvalds 6391da177e4SLinus Torvalds memcpy(buf, newcon, len); 6401da177e4SLinus Torvalds length = len; 6411da177e4SLinus Torvalds out3: 6421da177e4SLinus Torvalds kfree(newcon); 6431da177e4SLinus Torvalds out2: 6441da177e4SLinus Torvalds kfree(tcon); 6451da177e4SLinus Torvalds out: 6461da177e4SLinus Torvalds kfree(scon); 6471da177e4SLinus Torvalds return length; 6481da177e4SLinus Torvalds } 6491da177e4SLinus Torvalds 6501da177e4SLinus Torvalds static ssize_t sel_write_user(struct file * file, char *buf, size_t size) 6511da177e4SLinus Torvalds { 6521da177e4SLinus Torvalds char *con, *user, *ptr; 6531da177e4SLinus Torvalds u32 sid, *sids; 6541da177e4SLinus Torvalds ssize_t length; 6551da177e4SLinus Torvalds char *newcon; 6561da177e4SLinus Torvalds int i, rc; 6571da177e4SLinus Torvalds u32 len, nsids; 6581da177e4SLinus Torvalds 6591da177e4SLinus Torvalds length = task_has_security(current, SECURITY__COMPUTE_USER); 6601da177e4SLinus Torvalds if (length) 6611da177e4SLinus Torvalds return length; 6621da177e4SLinus Torvalds 6631da177e4SLinus Torvalds length = -ENOMEM; 66489d155efSJames Morris con = kzalloc(size+1, GFP_KERNEL); 6651da177e4SLinus Torvalds if (!con) 6661da177e4SLinus Torvalds return length; 6671da177e4SLinus Torvalds 66889d155efSJames Morris user = kzalloc(size+1, GFP_KERNEL); 6691da177e4SLinus Torvalds if (!user) 6701da177e4SLinus Torvalds goto out; 6711da177e4SLinus Torvalds 6721da177e4SLinus Torvalds length = -EINVAL; 6731da177e4SLinus Torvalds if (sscanf(buf, "%s %s", con, user) != 2) 6741da177e4SLinus Torvalds goto out2; 6751da177e4SLinus Torvalds 6761da177e4SLinus Torvalds length = security_context_to_sid(con, strlen(con)+1, &sid); 6771da177e4SLinus Torvalds if (length < 0) 6781da177e4SLinus Torvalds goto out2; 6791da177e4SLinus Torvalds 6801da177e4SLinus Torvalds length = security_get_user_sids(sid, user, &sids, &nsids); 6811da177e4SLinus Torvalds if (length < 0) 6821da177e4SLinus Torvalds goto out2; 6831da177e4SLinus Torvalds 6841da177e4SLinus Torvalds length = sprintf(buf, "%u", nsids) + 1; 6851da177e4SLinus Torvalds ptr = buf + length; 6861da177e4SLinus Torvalds for (i = 0; i < nsids; i++) { 6871da177e4SLinus Torvalds rc = security_sid_to_context(sids[i], &newcon, &len); 6881da177e4SLinus Torvalds if (rc) { 6891da177e4SLinus Torvalds length = rc; 6901da177e4SLinus Torvalds goto out3; 6911da177e4SLinus Torvalds } 6921da177e4SLinus Torvalds if ((length + len) >= SIMPLE_TRANSACTION_LIMIT) { 6931da177e4SLinus Torvalds kfree(newcon); 6941da177e4SLinus Torvalds length = -ERANGE; 6951da177e4SLinus Torvalds goto out3; 6961da177e4SLinus Torvalds } 6971da177e4SLinus Torvalds memcpy(ptr, newcon, len); 6981da177e4SLinus Torvalds kfree(newcon); 6991da177e4SLinus Torvalds ptr += len; 7001da177e4SLinus Torvalds length += len; 7011da177e4SLinus Torvalds } 7021da177e4SLinus Torvalds out3: 7031da177e4SLinus Torvalds kfree(sids); 7041da177e4SLinus Torvalds out2: 7051da177e4SLinus Torvalds kfree(user); 7061da177e4SLinus Torvalds out: 7071da177e4SLinus Torvalds kfree(con); 7081da177e4SLinus Torvalds return length; 7091da177e4SLinus Torvalds } 7101da177e4SLinus Torvalds 7111da177e4SLinus Torvalds static ssize_t sel_write_member(struct file * file, char *buf, size_t size) 7121da177e4SLinus Torvalds { 7131da177e4SLinus Torvalds char *scon, *tcon; 7141da177e4SLinus Torvalds u32 ssid, tsid, newsid; 7151da177e4SLinus Torvalds u16 tclass; 7161da177e4SLinus Torvalds ssize_t length; 7171da177e4SLinus Torvalds char *newcon; 7181da177e4SLinus Torvalds u32 len; 7191da177e4SLinus Torvalds 7201da177e4SLinus Torvalds length = task_has_security(current, SECURITY__COMPUTE_MEMBER); 7211da177e4SLinus Torvalds if (length) 7221da177e4SLinus Torvalds return length; 7231da177e4SLinus Torvalds 7241da177e4SLinus Torvalds length = -ENOMEM; 72589d155efSJames Morris scon = kzalloc(size+1, GFP_KERNEL); 7261da177e4SLinus Torvalds if (!scon) 7271da177e4SLinus Torvalds return length; 7281da177e4SLinus Torvalds 72989d155efSJames Morris tcon = kzalloc(size+1, GFP_KERNEL); 7301da177e4SLinus Torvalds if (!tcon) 7311da177e4SLinus Torvalds goto out; 7321da177e4SLinus Torvalds 7331da177e4SLinus Torvalds length = -EINVAL; 7341da177e4SLinus Torvalds if (sscanf(buf, "%s %s %hu", scon, tcon, &tclass) != 3) 7351da177e4SLinus Torvalds goto out2; 7361da177e4SLinus Torvalds 7371da177e4SLinus Torvalds length = security_context_to_sid(scon, strlen(scon)+1, &ssid); 7381da177e4SLinus Torvalds if (length < 0) 7391da177e4SLinus Torvalds goto out2; 7401da177e4SLinus Torvalds length = security_context_to_sid(tcon, strlen(tcon)+1, &tsid); 7411da177e4SLinus Torvalds if (length < 0) 7421da177e4SLinus Torvalds goto out2; 7431da177e4SLinus Torvalds 7441da177e4SLinus Torvalds length = security_member_sid(ssid, tsid, tclass, &newsid); 7451da177e4SLinus Torvalds if (length < 0) 7461da177e4SLinus Torvalds goto out2; 7471da177e4SLinus Torvalds 7481da177e4SLinus Torvalds length = security_sid_to_context(newsid, &newcon, &len); 7491da177e4SLinus Torvalds if (length < 0) 7501da177e4SLinus Torvalds goto out2; 7511da177e4SLinus Torvalds 7521da177e4SLinus Torvalds if (len > SIMPLE_TRANSACTION_LIMIT) { 7531da177e4SLinus Torvalds printk(KERN_ERR "%s: context size (%u) exceeds payload " 7541da177e4SLinus Torvalds "max\n", __FUNCTION__, len); 7551da177e4SLinus Torvalds length = -ERANGE; 7561da177e4SLinus Torvalds goto out3; 7571da177e4SLinus Torvalds } 7581da177e4SLinus Torvalds 7591da177e4SLinus Torvalds memcpy(buf, newcon, len); 7601da177e4SLinus Torvalds length = len; 7611da177e4SLinus Torvalds out3: 7621da177e4SLinus Torvalds kfree(newcon); 7631da177e4SLinus Torvalds out2: 7641da177e4SLinus Torvalds kfree(tcon); 7651da177e4SLinus Torvalds out: 7661da177e4SLinus Torvalds kfree(scon); 7671da177e4SLinus Torvalds return length; 7681da177e4SLinus Torvalds } 7691da177e4SLinus Torvalds 7701da177e4SLinus Torvalds static struct inode *sel_make_inode(struct super_block *sb, int mode) 7711da177e4SLinus Torvalds { 7721da177e4SLinus Torvalds struct inode *ret = new_inode(sb); 7731da177e4SLinus Torvalds 7741da177e4SLinus Torvalds if (ret) { 7751da177e4SLinus Torvalds ret->i_mode = mode; 7761da177e4SLinus Torvalds ret->i_uid = ret->i_gid = 0; 7771da177e4SLinus Torvalds ret->i_blocks = 0; 7781da177e4SLinus Torvalds ret->i_atime = ret->i_mtime = ret->i_ctime = CURRENT_TIME; 7791da177e4SLinus Torvalds } 7801da177e4SLinus Torvalds return ret; 7811da177e4SLinus Torvalds } 7821da177e4SLinus Torvalds 7831da177e4SLinus Torvalds #define BOOL_INO_OFFSET 30 7841da177e4SLinus Torvalds 7851da177e4SLinus Torvalds static ssize_t sel_read_bool(struct file *filep, char __user *buf, 7861da177e4SLinus Torvalds size_t count, loff_t *ppos) 7871da177e4SLinus Torvalds { 7881da177e4SLinus Torvalds char *page = NULL; 7891da177e4SLinus Torvalds ssize_t length; 7901da177e4SLinus Torvalds ssize_t ret; 7911da177e4SLinus Torvalds int cur_enforcing; 7921da177e4SLinus Torvalds struct inode *inode; 7931da177e4SLinus Torvalds 794bb003079SIngo Molnar mutex_lock(&sel_mutex); 7951da177e4SLinus Torvalds 7961da177e4SLinus Torvalds ret = -EFAULT; 7971da177e4SLinus Torvalds 7981da177e4SLinus Torvalds /* check to see if this file has been deleted */ 7991da177e4SLinus Torvalds if (!filep->f_op) 8001da177e4SLinus Torvalds goto out; 8011da177e4SLinus Torvalds 802bfd51626SDavi Arnaut if (count > PAGE_SIZE) { 8031da177e4SLinus Torvalds ret = -EINVAL; 8041da177e4SLinus Torvalds goto out; 8051da177e4SLinus Torvalds } 8061da177e4SLinus Torvalds if (!(page = (char*)get_zeroed_page(GFP_KERNEL))) { 8071da177e4SLinus Torvalds ret = -ENOMEM; 8081da177e4SLinus Torvalds goto out; 8091da177e4SLinus Torvalds } 8101da177e4SLinus Torvalds 8113d5ff529SJosef Sipek inode = filep->f_path.dentry->d_inode; 8121da177e4SLinus Torvalds cur_enforcing = security_get_bool_value(inode->i_ino - BOOL_INO_OFFSET); 8131da177e4SLinus Torvalds if (cur_enforcing < 0) { 8141da177e4SLinus Torvalds ret = cur_enforcing; 8151da177e4SLinus Torvalds goto out; 8161da177e4SLinus Torvalds } 8171da177e4SLinus Torvalds 8181da177e4SLinus Torvalds length = scnprintf(page, PAGE_SIZE, "%d %d", cur_enforcing, 8191da177e4SLinus Torvalds bool_pending_values[inode->i_ino - BOOL_INO_OFFSET]); 82068bdcf28SStephen Smalley ret = simple_read_from_buffer(buf, count, ppos, page, length); 8211da177e4SLinus Torvalds out: 822bb003079SIngo Molnar mutex_unlock(&sel_mutex); 8231da177e4SLinus Torvalds if (page) 8241da177e4SLinus Torvalds free_page((unsigned long)page); 8251da177e4SLinus Torvalds return ret; 8261da177e4SLinus Torvalds } 8271da177e4SLinus Torvalds 8281da177e4SLinus Torvalds static ssize_t sel_write_bool(struct file *filep, const char __user *buf, 8291da177e4SLinus Torvalds size_t count, loff_t *ppos) 8301da177e4SLinus Torvalds { 8311da177e4SLinus Torvalds char *page = NULL; 8321da177e4SLinus Torvalds ssize_t length = -EFAULT; 8331da177e4SLinus Torvalds int new_value; 8341da177e4SLinus Torvalds struct inode *inode; 8351da177e4SLinus Torvalds 836bb003079SIngo Molnar mutex_lock(&sel_mutex); 8371da177e4SLinus Torvalds 8381da177e4SLinus Torvalds length = task_has_security(current, SECURITY__SETBOOL); 8391da177e4SLinus Torvalds if (length) 8401da177e4SLinus Torvalds goto out; 8411da177e4SLinus Torvalds 8421da177e4SLinus Torvalds /* check to see if this file has been deleted */ 8431da177e4SLinus Torvalds if (!filep->f_op) 8441da177e4SLinus Torvalds goto out; 8451da177e4SLinus Torvalds 846bfd51626SDavi Arnaut if (count >= PAGE_SIZE) { 8471da177e4SLinus Torvalds length = -ENOMEM; 8481da177e4SLinus Torvalds goto out; 8491da177e4SLinus Torvalds } 8501da177e4SLinus Torvalds if (*ppos != 0) { 8511da177e4SLinus Torvalds /* No partial writes. */ 8521da177e4SLinus Torvalds goto out; 8531da177e4SLinus Torvalds } 8541da177e4SLinus Torvalds page = (char*)get_zeroed_page(GFP_KERNEL); 8551da177e4SLinus Torvalds if (!page) { 8561da177e4SLinus Torvalds length = -ENOMEM; 8571da177e4SLinus Torvalds goto out; 8581da177e4SLinus Torvalds } 8591da177e4SLinus Torvalds 8601da177e4SLinus Torvalds if (copy_from_user(page, buf, count)) 8611da177e4SLinus Torvalds goto out; 8621da177e4SLinus Torvalds 8631da177e4SLinus Torvalds length = -EINVAL; 8641da177e4SLinus Torvalds if (sscanf(page, "%d", &new_value) != 1) 8651da177e4SLinus Torvalds goto out; 8661da177e4SLinus Torvalds 8671da177e4SLinus Torvalds if (new_value) 8681da177e4SLinus Torvalds new_value = 1; 8691da177e4SLinus Torvalds 8703d5ff529SJosef Sipek inode = filep->f_path.dentry->d_inode; 8711da177e4SLinus Torvalds bool_pending_values[inode->i_ino - BOOL_INO_OFFSET] = new_value; 8721da177e4SLinus Torvalds length = count; 8731da177e4SLinus Torvalds 8741da177e4SLinus Torvalds out: 875bb003079SIngo Molnar mutex_unlock(&sel_mutex); 8761da177e4SLinus Torvalds if (page) 8771da177e4SLinus Torvalds free_page((unsigned long) page); 8781da177e4SLinus Torvalds return length; 8791da177e4SLinus Torvalds } 8801da177e4SLinus Torvalds 8819c2e08c5SArjan van de Ven static const struct file_operations sel_bool_ops = { 8821da177e4SLinus Torvalds .read = sel_read_bool, 8831da177e4SLinus Torvalds .write = sel_write_bool, 8841da177e4SLinus Torvalds }; 8851da177e4SLinus Torvalds 8861da177e4SLinus Torvalds static ssize_t sel_commit_bools_write(struct file *filep, 8871da177e4SLinus Torvalds const char __user *buf, 8881da177e4SLinus Torvalds size_t count, loff_t *ppos) 8891da177e4SLinus Torvalds { 8901da177e4SLinus Torvalds char *page = NULL; 8911da177e4SLinus Torvalds ssize_t length = -EFAULT; 8921da177e4SLinus Torvalds int new_value; 8931da177e4SLinus Torvalds 894bb003079SIngo Molnar mutex_lock(&sel_mutex); 8951da177e4SLinus Torvalds 8961da177e4SLinus Torvalds length = task_has_security(current, SECURITY__SETBOOL); 8971da177e4SLinus Torvalds if (length) 8981da177e4SLinus Torvalds goto out; 8991da177e4SLinus Torvalds 9001da177e4SLinus Torvalds /* check to see if this file has been deleted */ 9011da177e4SLinus Torvalds if (!filep->f_op) 9021da177e4SLinus Torvalds goto out; 9031da177e4SLinus Torvalds 904bfd51626SDavi Arnaut if (count >= PAGE_SIZE) { 9051da177e4SLinus Torvalds length = -ENOMEM; 9061da177e4SLinus Torvalds goto out; 9071da177e4SLinus Torvalds } 9081da177e4SLinus Torvalds if (*ppos != 0) { 9091da177e4SLinus Torvalds /* No partial writes. */ 9101da177e4SLinus Torvalds goto out; 9111da177e4SLinus Torvalds } 9121da177e4SLinus Torvalds page = (char*)get_zeroed_page(GFP_KERNEL); 9131da177e4SLinus Torvalds if (!page) { 9141da177e4SLinus Torvalds length = -ENOMEM; 9151da177e4SLinus Torvalds goto out; 9161da177e4SLinus Torvalds } 9171da177e4SLinus Torvalds 9181da177e4SLinus Torvalds if (copy_from_user(page, buf, count)) 9191da177e4SLinus Torvalds goto out; 9201da177e4SLinus Torvalds 9211da177e4SLinus Torvalds length = -EINVAL; 9221da177e4SLinus Torvalds if (sscanf(page, "%d", &new_value) != 1) 9231da177e4SLinus Torvalds goto out; 9241da177e4SLinus Torvalds 92520c19e41SDavi Arnaut if (new_value && bool_pending_values) { 9261da177e4SLinus Torvalds security_set_bools(bool_num, bool_pending_values); 9271da177e4SLinus Torvalds } 9281da177e4SLinus Torvalds 9291da177e4SLinus Torvalds length = count; 9301da177e4SLinus Torvalds 9311da177e4SLinus Torvalds out: 932bb003079SIngo Molnar mutex_unlock(&sel_mutex); 9331da177e4SLinus Torvalds if (page) 9341da177e4SLinus Torvalds free_page((unsigned long) page); 9351da177e4SLinus Torvalds return length; 9361da177e4SLinus Torvalds } 9371da177e4SLinus Torvalds 9389c2e08c5SArjan van de Ven static const struct file_operations sel_commit_bools_ops = { 9391da177e4SLinus Torvalds .write = sel_commit_bools_write, 9401da177e4SLinus Torvalds }; 9411da177e4SLinus Torvalds 9421da177e4SLinus Torvalds /* delete booleans - partial revoke() from 9431da177e4SLinus Torvalds * fs/proc/generic.c proc_kill_inodes */ 9441da177e4SLinus Torvalds static void sel_remove_bools(struct dentry *de) 9451da177e4SLinus Torvalds { 9461da177e4SLinus Torvalds struct list_head *p, *node; 9471da177e4SLinus Torvalds struct super_block *sb = de->d_sb; 9481da177e4SLinus Torvalds 9491da177e4SLinus Torvalds spin_lock(&dcache_lock); 9501da177e4SLinus Torvalds node = de->d_subdirs.next; 9511da177e4SLinus Torvalds while (node != &de->d_subdirs) { 9525160ee6fSEric Dumazet struct dentry *d = list_entry(node, struct dentry, d_u.d_child); 9531da177e4SLinus Torvalds list_del_init(node); 9541da177e4SLinus Torvalds 9551da177e4SLinus Torvalds if (d->d_inode) { 9561da177e4SLinus Torvalds d = dget_locked(d); 9571da177e4SLinus Torvalds spin_unlock(&dcache_lock); 9581da177e4SLinus Torvalds d_delete(d); 9591da177e4SLinus Torvalds simple_unlink(de->d_inode, d); 9601da177e4SLinus Torvalds dput(d); 9611da177e4SLinus Torvalds spin_lock(&dcache_lock); 9621da177e4SLinus Torvalds } 9631da177e4SLinus Torvalds node = de->d_subdirs.next; 9641da177e4SLinus Torvalds } 9651da177e4SLinus Torvalds 9661da177e4SLinus Torvalds spin_unlock(&dcache_lock); 9671da177e4SLinus Torvalds 9681da177e4SLinus Torvalds file_list_lock(); 9691da177e4SLinus Torvalds list_for_each(p, &sb->s_files) { 9702f512016SEric Dumazet struct file * filp = list_entry(p, struct file, f_u.fu_list); 9713d5ff529SJosef Sipek struct dentry * dentry = filp->f_path.dentry; 9721da177e4SLinus Torvalds 9731da177e4SLinus Torvalds if (dentry->d_parent != de) { 9741da177e4SLinus Torvalds continue; 9751da177e4SLinus Torvalds } 9761da177e4SLinus Torvalds filp->f_op = NULL; 9771da177e4SLinus Torvalds } 9781da177e4SLinus Torvalds file_list_unlock(); 9791da177e4SLinus Torvalds } 9801da177e4SLinus Torvalds 9811da177e4SLinus Torvalds #define BOOL_DIR_NAME "booleans" 9821da177e4SLinus Torvalds 9831da177e4SLinus Torvalds static int sel_make_bools(void) 9841da177e4SLinus Torvalds { 9851da177e4SLinus Torvalds int i, ret = 0; 9861da177e4SLinus Torvalds ssize_t len; 9871da177e4SLinus Torvalds struct dentry *dentry = NULL; 9881da177e4SLinus Torvalds struct dentry *dir = bool_dir; 9891da177e4SLinus Torvalds struct inode *inode = NULL; 9901da177e4SLinus Torvalds struct inode_security_struct *isec; 9911da177e4SLinus Torvalds char **names = NULL, *page; 9921da177e4SLinus Torvalds int num; 9931da177e4SLinus Torvalds int *values = NULL; 9941da177e4SLinus Torvalds u32 sid; 9951da177e4SLinus Torvalds 9961da177e4SLinus Torvalds /* remove any existing files */ 9971da177e4SLinus Torvalds kfree(bool_pending_values); 99820c19e41SDavi Arnaut bool_pending_values = NULL; 9991da177e4SLinus Torvalds 10001da177e4SLinus Torvalds sel_remove_bools(dir); 10011da177e4SLinus Torvalds 10021da177e4SLinus Torvalds if (!(page = (char*)get_zeroed_page(GFP_KERNEL))) 10031da177e4SLinus Torvalds return -ENOMEM; 10041da177e4SLinus Torvalds 10051da177e4SLinus Torvalds ret = security_get_bools(&num, &names, &values); 10061da177e4SLinus Torvalds if (ret != 0) 10071da177e4SLinus Torvalds goto out; 10081da177e4SLinus Torvalds 10091da177e4SLinus Torvalds for (i = 0; i < num; i++) { 10101da177e4SLinus Torvalds dentry = d_alloc_name(dir, names[i]); 10111da177e4SLinus Torvalds if (!dentry) { 10121da177e4SLinus Torvalds ret = -ENOMEM; 10131da177e4SLinus Torvalds goto err; 10141da177e4SLinus Torvalds } 10151da177e4SLinus Torvalds inode = sel_make_inode(dir->d_sb, S_IFREG | S_IRUGO | S_IWUSR); 10161da177e4SLinus Torvalds if (!inode) { 10171da177e4SLinus Torvalds ret = -ENOMEM; 10181da177e4SLinus Torvalds goto err; 10191da177e4SLinus Torvalds } 10201da177e4SLinus Torvalds 10211da177e4SLinus Torvalds len = snprintf(page, PAGE_SIZE, "/%s/%s", BOOL_DIR_NAME, names[i]); 10221da177e4SLinus Torvalds if (len < 0) { 10231da177e4SLinus Torvalds ret = -EINVAL; 10241da177e4SLinus Torvalds goto err; 10251da177e4SLinus Torvalds } else if (len >= PAGE_SIZE) { 10261da177e4SLinus Torvalds ret = -ENAMETOOLONG; 10271da177e4SLinus Torvalds goto err; 10281da177e4SLinus Torvalds } 10291da177e4SLinus Torvalds isec = (struct inode_security_struct*)inode->i_security; 10301da177e4SLinus Torvalds if ((ret = security_genfs_sid("selinuxfs", page, SECCLASS_FILE, &sid))) 10311da177e4SLinus Torvalds goto err; 10321da177e4SLinus Torvalds isec->sid = sid; 10331da177e4SLinus Torvalds isec->initialized = 1; 10341da177e4SLinus Torvalds inode->i_fop = &sel_bool_ops; 10351da177e4SLinus Torvalds inode->i_ino = i + BOOL_INO_OFFSET; 10361da177e4SLinus Torvalds d_add(dentry, inode); 10371da177e4SLinus Torvalds } 10381da177e4SLinus Torvalds bool_num = num; 10391da177e4SLinus Torvalds bool_pending_values = values; 10401da177e4SLinus Torvalds out: 10411da177e4SLinus Torvalds free_page((unsigned long)page); 10421da177e4SLinus Torvalds if (names) { 10439a5f04bfSJesper Juhl for (i = 0; i < num; i++) 10441da177e4SLinus Torvalds kfree(names[i]); 10451da177e4SLinus Torvalds kfree(names); 10461da177e4SLinus Torvalds } 10471da177e4SLinus Torvalds return ret; 10481da177e4SLinus Torvalds err: 104920c19e41SDavi Arnaut kfree(values); 1050253a8b1dSJames Morris sel_remove_bools(dir); 10511da177e4SLinus Torvalds ret = -ENOMEM; 10521da177e4SLinus Torvalds goto out; 10531da177e4SLinus Torvalds } 10541da177e4SLinus Torvalds 10551da177e4SLinus Torvalds #define NULL_FILE_NAME "null" 10561da177e4SLinus Torvalds 10571da177e4SLinus Torvalds struct dentry *selinux_null = NULL; 10581da177e4SLinus Torvalds 10591da177e4SLinus Torvalds static ssize_t sel_read_avc_cache_threshold(struct file *filp, char __user *buf, 10601da177e4SLinus Torvalds size_t count, loff_t *ppos) 10611da177e4SLinus Torvalds { 10621da177e4SLinus Torvalds char tmpbuf[TMPBUFLEN]; 10631da177e4SLinus Torvalds ssize_t length; 10641da177e4SLinus Torvalds 10651da177e4SLinus Torvalds length = scnprintf(tmpbuf, TMPBUFLEN, "%u", avc_cache_threshold); 10661da177e4SLinus Torvalds return simple_read_from_buffer(buf, count, ppos, tmpbuf, length); 10671da177e4SLinus Torvalds } 10681da177e4SLinus Torvalds 10691da177e4SLinus Torvalds static ssize_t sel_write_avc_cache_threshold(struct file * file, 10701da177e4SLinus Torvalds const char __user * buf, 10711da177e4SLinus Torvalds size_t count, loff_t *ppos) 10721da177e4SLinus Torvalds 10731da177e4SLinus Torvalds { 10741da177e4SLinus Torvalds char *page; 10751da177e4SLinus Torvalds ssize_t ret; 10761da177e4SLinus Torvalds int new_value; 10771da177e4SLinus Torvalds 1078bfd51626SDavi Arnaut if (count >= PAGE_SIZE) { 10791da177e4SLinus Torvalds ret = -ENOMEM; 10801da177e4SLinus Torvalds goto out; 10811da177e4SLinus Torvalds } 10821da177e4SLinus Torvalds 10831da177e4SLinus Torvalds if (*ppos != 0) { 10841da177e4SLinus Torvalds /* No partial writes. */ 10851da177e4SLinus Torvalds ret = -EINVAL; 10861da177e4SLinus Torvalds goto out; 10871da177e4SLinus Torvalds } 10881da177e4SLinus Torvalds 10891da177e4SLinus Torvalds page = (char*)get_zeroed_page(GFP_KERNEL); 10901da177e4SLinus Torvalds if (!page) { 10911da177e4SLinus Torvalds ret = -ENOMEM; 10921da177e4SLinus Torvalds goto out; 10931da177e4SLinus Torvalds } 10941da177e4SLinus Torvalds 10951da177e4SLinus Torvalds if (copy_from_user(page, buf, count)) { 10961da177e4SLinus Torvalds ret = -EFAULT; 10971da177e4SLinus Torvalds goto out_free; 10981da177e4SLinus Torvalds } 10991da177e4SLinus Torvalds 11001da177e4SLinus Torvalds if (sscanf(page, "%u", &new_value) != 1) { 11011da177e4SLinus Torvalds ret = -EINVAL; 11021da177e4SLinus Torvalds goto out; 11031da177e4SLinus Torvalds } 11041da177e4SLinus Torvalds 11051da177e4SLinus Torvalds if (new_value != avc_cache_threshold) { 11061da177e4SLinus Torvalds ret = task_has_security(current, SECURITY__SETSECPARAM); 11071da177e4SLinus Torvalds if (ret) 11081da177e4SLinus Torvalds goto out_free; 11091da177e4SLinus Torvalds avc_cache_threshold = new_value; 11101da177e4SLinus Torvalds } 11111da177e4SLinus Torvalds ret = count; 11121da177e4SLinus Torvalds out_free: 11131da177e4SLinus Torvalds free_page((unsigned long)page); 11141da177e4SLinus Torvalds out: 11151da177e4SLinus Torvalds return ret; 11161da177e4SLinus Torvalds } 11171da177e4SLinus Torvalds 11181da177e4SLinus Torvalds static ssize_t sel_read_avc_hash_stats(struct file *filp, char __user *buf, 11191da177e4SLinus Torvalds size_t count, loff_t *ppos) 11201da177e4SLinus Torvalds { 11211da177e4SLinus Torvalds char *page; 11221da177e4SLinus Torvalds ssize_t ret = 0; 11231da177e4SLinus Torvalds 11241da177e4SLinus Torvalds page = (char *)__get_free_page(GFP_KERNEL); 11251da177e4SLinus Torvalds if (!page) { 11261da177e4SLinus Torvalds ret = -ENOMEM; 11271da177e4SLinus Torvalds goto out; 11281da177e4SLinus Torvalds } 11291da177e4SLinus Torvalds ret = avc_get_hash_stats(page); 11301da177e4SLinus Torvalds if (ret >= 0) 11311da177e4SLinus Torvalds ret = simple_read_from_buffer(buf, count, ppos, page, ret); 11321da177e4SLinus Torvalds free_page((unsigned long)page); 11331da177e4SLinus Torvalds out: 11341da177e4SLinus Torvalds return ret; 11351da177e4SLinus Torvalds } 11361da177e4SLinus Torvalds 11379c2e08c5SArjan van de Ven static const struct file_operations sel_avc_cache_threshold_ops = { 11381da177e4SLinus Torvalds .read = sel_read_avc_cache_threshold, 11391da177e4SLinus Torvalds .write = sel_write_avc_cache_threshold, 11401da177e4SLinus Torvalds }; 11411da177e4SLinus Torvalds 11429c2e08c5SArjan van de Ven static const struct file_operations sel_avc_hash_stats_ops = { 11431da177e4SLinus Torvalds .read = sel_read_avc_hash_stats, 11441da177e4SLinus Torvalds }; 11451da177e4SLinus Torvalds 11461da177e4SLinus Torvalds #ifdef CONFIG_SECURITY_SELINUX_AVC_STATS 11471da177e4SLinus Torvalds static struct avc_cache_stats *sel_avc_get_stat_idx(loff_t *idx) 11481da177e4SLinus Torvalds { 11491da177e4SLinus Torvalds int cpu; 11501da177e4SLinus Torvalds 11511da177e4SLinus Torvalds for (cpu = *idx; cpu < NR_CPUS; ++cpu) { 11521da177e4SLinus Torvalds if (!cpu_possible(cpu)) 11531da177e4SLinus Torvalds continue; 11541da177e4SLinus Torvalds *idx = cpu + 1; 11551da177e4SLinus Torvalds return &per_cpu(avc_cache_stats, cpu); 11561da177e4SLinus Torvalds } 11571da177e4SLinus Torvalds return NULL; 11581da177e4SLinus Torvalds } 11591da177e4SLinus Torvalds 11601da177e4SLinus Torvalds static void *sel_avc_stats_seq_start(struct seq_file *seq, loff_t *pos) 11611da177e4SLinus Torvalds { 11621da177e4SLinus Torvalds loff_t n = *pos - 1; 11631da177e4SLinus Torvalds 11641da177e4SLinus Torvalds if (*pos == 0) 11651da177e4SLinus Torvalds return SEQ_START_TOKEN; 11661da177e4SLinus Torvalds 11671da177e4SLinus Torvalds return sel_avc_get_stat_idx(&n); 11681da177e4SLinus Torvalds } 11691da177e4SLinus Torvalds 11701da177e4SLinus Torvalds static void *sel_avc_stats_seq_next(struct seq_file *seq, void *v, loff_t *pos) 11711da177e4SLinus Torvalds { 11721da177e4SLinus Torvalds return sel_avc_get_stat_idx(pos); 11731da177e4SLinus Torvalds } 11741da177e4SLinus Torvalds 11751da177e4SLinus Torvalds static int sel_avc_stats_seq_show(struct seq_file *seq, void *v) 11761da177e4SLinus Torvalds { 11771da177e4SLinus Torvalds struct avc_cache_stats *st = v; 11781da177e4SLinus Torvalds 11791da177e4SLinus Torvalds if (v == SEQ_START_TOKEN) 11801da177e4SLinus Torvalds seq_printf(seq, "lookups hits misses allocations reclaims " 11811da177e4SLinus Torvalds "frees\n"); 11821da177e4SLinus Torvalds else 11831da177e4SLinus Torvalds seq_printf(seq, "%u %u %u %u %u %u\n", st->lookups, 11841da177e4SLinus Torvalds st->hits, st->misses, st->allocations, 11851da177e4SLinus Torvalds st->reclaims, st->frees); 11861da177e4SLinus Torvalds return 0; 11871da177e4SLinus Torvalds } 11881da177e4SLinus Torvalds 11891da177e4SLinus Torvalds static void sel_avc_stats_seq_stop(struct seq_file *seq, void *v) 11901da177e4SLinus Torvalds { } 11911da177e4SLinus Torvalds 11921da177e4SLinus Torvalds static struct seq_operations sel_avc_cache_stats_seq_ops = { 11931da177e4SLinus Torvalds .start = sel_avc_stats_seq_start, 11941da177e4SLinus Torvalds .next = sel_avc_stats_seq_next, 11951da177e4SLinus Torvalds .show = sel_avc_stats_seq_show, 11961da177e4SLinus Torvalds .stop = sel_avc_stats_seq_stop, 11971da177e4SLinus Torvalds }; 11981da177e4SLinus Torvalds 11991da177e4SLinus Torvalds static int sel_open_avc_cache_stats(struct inode *inode, struct file *file) 12001da177e4SLinus Torvalds { 12011da177e4SLinus Torvalds return seq_open(file, &sel_avc_cache_stats_seq_ops); 12021da177e4SLinus Torvalds } 12031da177e4SLinus Torvalds 12049c2e08c5SArjan van de Ven static const struct file_operations sel_avc_cache_stats_ops = { 12051da177e4SLinus Torvalds .open = sel_open_avc_cache_stats, 12061da177e4SLinus Torvalds .read = seq_read, 12071da177e4SLinus Torvalds .llseek = seq_lseek, 12081da177e4SLinus Torvalds .release = seq_release, 12091da177e4SLinus Torvalds }; 12101da177e4SLinus Torvalds #endif 12111da177e4SLinus Torvalds 12121da177e4SLinus Torvalds static int sel_make_avc_files(struct dentry *dir) 12131da177e4SLinus Torvalds { 12141da177e4SLinus Torvalds int i, ret = 0; 12151da177e4SLinus Torvalds static struct tree_descr files[] = { 12161da177e4SLinus Torvalds { "cache_threshold", 12171da177e4SLinus Torvalds &sel_avc_cache_threshold_ops, S_IRUGO|S_IWUSR }, 12181da177e4SLinus Torvalds { "hash_stats", &sel_avc_hash_stats_ops, S_IRUGO }, 12191da177e4SLinus Torvalds #ifdef CONFIG_SECURITY_SELINUX_AVC_STATS 12201da177e4SLinus Torvalds { "cache_stats", &sel_avc_cache_stats_ops, S_IRUGO }, 12211da177e4SLinus Torvalds #endif 12221da177e4SLinus Torvalds }; 12231da177e4SLinus Torvalds 12246e20a64aSNicolas Kaiser for (i = 0; i < ARRAY_SIZE(files); i++) { 12251da177e4SLinus Torvalds struct inode *inode; 12261da177e4SLinus Torvalds struct dentry *dentry; 12271da177e4SLinus Torvalds 12281da177e4SLinus Torvalds dentry = d_alloc_name(dir, files[i].name); 12291da177e4SLinus Torvalds if (!dentry) { 12301da177e4SLinus Torvalds ret = -ENOMEM; 1231d6aafa65SJames Morris goto out; 12321da177e4SLinus Torvalds } 12331da177e4SLinus Torvalds 12341da177e4SLinus Torvalds inode = sel_make_inode(dir->d_sb, S_IFREG|files[i].mode); 12351da177e4SLinus Torvalds if (!inode) { 12361da177e4SLinus Torvalds ret = -ENOMEM; 1237d6aafa65SJames Morris goto out; 12381da177e4SLinus Torvalds } 12391da177e4SLinus Torvalds inode->i_fop = files[i].ops; 12401da177e4SLinus Torvalds d_add(dentry, inode); 12411da177e4SLinus Torvalds } 12421da177e4SLinus Torvalds out: 12431da177e4SLinus Torvalds return ret; 12441da177e4SLinus Torvalds } 12451da177e4SLinus Torvalds 1246f0ee2e46SJames Carter static ssize_t sel_read_initcon(struct file * file, char __user *buf, 1247f0ee2e46SJames Carter size_t count, loff_t *ppos) 1248f0ee2e46SJames Carter { 1249f0ee2e46SJames Carter struct inode *inode; 1250f0ee2e46SJames Carter char *con; 1251f0ee2e46SJames Carter u32 sid, len; 1252f0ee2e46SJames Carter ssize_t ret; 1253f0ee2e46SJames Carter 1254f0ee2e46SJames Carter inode = file->f_path.dentry->d_inode; 1255f0ee2e46SJames Carter sid = inode->i_ino&SEL_INO_MASK; 1256f0ee2e46SJames Carter ret = security_sid_to_context(sid, &con, &len); 1257f0ee2e46SJames Carter if (ret < 0) 1258f0ee2e46SJames Carter return ret; 1259f0ee2e46SJames Carter 1260f0ee2e46SJames Carter ret = simple_read_from_buffer(buf, count, ppos, con, len); 1261f0ee2e46SJames Carter kfree(con); 1262f0ee2e46SJames Carter return ret; 1263f0ee2e46SJames Carter } 1264f0ee2e46SJames Carter 1265f0ee2e46SJames Carter static const struct file_operations sel_initcon_ops = { 1266f0ee2e46SJames Carter .read = sel_read_initcon, 1267f0ee2e46SJames Carter }; 1268f0ee2e46SJames Carter 1269f0ee2e46SJames Carter static int sel_make_initcon_files(struct dentry *dir) 1270f0ee2e46SJames Carter { 1271f0ee2e46SJames Carter int i, ret = 0; 1272f0ee2e46SJames Carter 1273f0ee2e46SJames Carter for (i = 1; i <= SECINITSID_NUM; i++) { 1274f0ee2e46SJames Carter struct inode *inode; 1275f0ee2e46SJames Carter struct dentry *dentry; 1276f0ee2e46SJames Carter dentry = d_alloc_name(dir, security_get_initial_sid_context(i)); 1277f0ee2e46SJames Carter if (!dentry) { 1278f0ee2e46SJames Carter ret = -ENOMEM; 1279f0ee2e46SJames Carter goto out; 1280f0ee2e46SJames Carter } 1281f0ee2e46SJames Carter 1282f0ee2e46SJames Carter inode = sel_make_inode(dir->d_sb, S_IFREG|S_IRUGO); 1283f0ee2e46SJames Carter if (!inode) { 1284f0ee2e46SJames Carter ret = -ENOMEM; 1285f0ee2e46SJames Carter goto out; 1286f0ee2e46SJames Carter } 1287f0ee2e46SJames Carter inode->i_fop = &sel_initcon_ops; 1288f0ee2e46SJames Carter inode->i_ino = i|SEL_INITCON_INO_OFFSET; 1289f0ee2e46SJames Carter d_add(dentry, inode); 1290f0ee2e46SJames Carter } 1291f0ee2e46SJames Carter out: 1292f0ee2e46SJames Carter return ret; 1293f0ee2e46SJames Carter } 1294f0ee2e46SJames Carter 1295edb20fb5SJames Morris static int sel_make_dir(struct inode *dir, struct dentry *dentry) 12961da177e4SLinus Torvalds { 12971da177e4SLinus Torvalds int ret = 0; 12981da177e4SLinus Torvalds struct inode *inode; 12991da177e4SLinus Torvalds 1300edb20fb5SJames Morris inode = sel_make_inode(dir->i_sb, S_IFDIR | S_IRUGO | S_IXUGO); 13011da177e4SLinus Torvalds if (!inode) { 13021da177e4SLinus Torvalds ret = -ENOMEM; 13031da177e4SLinus Torvalds goto out; 13041da177e4SLinus Torvalds } 13051da177e4SLinus Torvalds inode->i_op = &simple_dir_inode_operations; 13061da177e4SLinus Torvalds inode->i_fop = &simple_dir_operations; 130740e906f8SJames Morris /* directory inodes start off with i_nlink == 2 (for "." entry) */ 1308d8c76e6fSDave Hansen inc_nlink(inode); 13091da177e4SLinus Torvalds d_add(dentry, inode); 1310edb20fb5SJames Morris /* bump link count on parent directory, too */ 1311d8c76e6fSDave Hansen inc_nlink(dir); 13121da177e4SLinus Torvalds out: 13131da177e4SLinus Torvalds return ret; 13141da177e4SLinus Torvalds } 13151da177e4SLinus Torvalds 13161da177e4SLinus Torvalds static int sel_fill_super(struct super_block * sb, void * data, int silent) 13171da177e4SLinus Torvalds { 13181da177e4SLinus Torvalds int ret; 13191da177e4SLinus Torvalds struct dentry *dentry; 1320edb20fb5SJames Morris struct inode *inode, *root_inode; 13211da177e4SLinus Torvalds struct inode_security_struct *isec; 13221da177e4SLinus Torvalds 13231da177e4SLinus Torvalds static struct tree_descr selinux_files[] = { 13241da177e4SLinus Torvalds [SEL_LOAD] = {"load", &sel_load_ops, S_IRUSR|S_IWUSR}, 13251da177e4SLinus Torvalds [SEL_ENFORCE] = {"enforce", &sel_enforce_ops, S_IRUGO|S_IWUSR}, 1326ce9982d0SStephen Smalley [SEL_CONTEXT] = {"context", &transaction_ops, S_IRUGO|S_IWUGO}, 13271da177e4SLinus Torvalds [SEL_ACCESS] = {"access", &transaction_ops, S_IRUGO|S_IWUGO}, 13281da177e4SLinus Torvalds [SEL_CREATE] = {"create", &transaction_ops, S_IRUGO|S_IWUGO}, 13291da177e4SLinus Torvalds [SEL_RELABEL] = {"relabel", &transaction_ops, S_IRUGO|S_IWUGO}, 13301da177e4SLinus Torvalds [SEL_USER] = {"user", &transaction_ops, S_IRUGO|S_IWUGO}, 13311da177e4SLinus Torvalds [SEL_POLICYVERS] = {"policyvers", &sel_policyvers_ops, S_IRUGO}, 13321da177e4SLinus Torvalds [SEL_COMMIT_BOOLS] = {"commit_pending_bools", &sel_commit_bools_ops, S_IWUSR}, 13331da177e4SLinus Torvalds [SEL_MLS] = {"mls", &sel_mls_ops, S_IRUGO}, 13341da177e4SLinus Torvalds [SEL_DISABLE] = {"disable", &sel_disable_ops, S_IWUSR}, 13351da177e4SLinus Torvalds [SEL_MEMBER] = {"member", &transaction_ops, S_IRUGO|S_IWUGO}, 13361da177e4SLinus Torvalds [SEL_CHECKREQPROT] = {"checkreqprot", &sel_checkreqprot_ops, S_IRUGO|S_IWUSR}, 13374e5ab4cbSJames Morris [SEL_COMPAT_NET] = {"compat_net", &sel_compat_net_ops, S_IRUGO|S_IWUSR}, 13381da177e4SLinus Torvalds /* last one */ {""} 13391da177e4SLinus Torvalds }; 13401da177e4SLinus Torvalds ret = simple_fill_super(sb, SELINUX_MAGIC, selinux_files); 13411da177e4SLinus Torvalds if (ret) 1342161ce45aSJames Morris goto err; 13431da177e4SLinus Torvalds 1344edb20fb5SJames Morris root_inode = sb->s_root->d_inode; 1345edb20fb5SJames Morris 13461da177e4SLinus Torvalds dentry = d_alloc_name(sb->s_root, BOOL_DIR_NAME); 1347161ce45aSJames Morris if (!dentry) { 1348161ce45aSJames Morris ret = -ENOMEM; 1349161ce45aSJames Morris goto err; 1350161ce45aSJames Morris } 13511da177e4SLinus Torvalds 1352edb20fb5SJames Morris ret = sel_make_dir(root_inode, dentry); 1353cde174a8SJames Morris if (ret) 1354161ce45aSJames Morris goto err; 1355cde174a8SJames Morris 13561da177e4SLinus Torvalds bool_dir = dentry; 13571da177e4SLinus Torvalds 13581da177e4SLinus Torvalds dentry = d_alloc_name(sb->s_root, NULL_FILE_NAME); 1359161ce45aSJames Morris if (!dentry) { 1360161ce45aSJames Morris ret = -ENOMEM; 1361161ce45aSJames Morris goto err; 1362161ce45aSJames Morris } 13631da177e4SLinus Torvalds 13641da177e4SLinus Torvalds inode = sel_make_inode(sb, S_IFCHR | S_IRUGO | S_IWUGO); 1365161ce45aSJames Morris if (!inode) { 1366161ce45aSJames Morris ret = -ENOMEM; 1367161ce45aSJames Morris goto err; 1368161ce45aSJames Morris } 13691da177e4SLinus Torvalds isec = (struct inode_security_struct*)inode->i_security; 13701da177e4SLinus Torvalds isec->sid = SECINITSID_DEVNULL; 13711da177e4SLinus Torvalds isec->sclass = SECCLASS_CHR_FILE; 13721da177e4SLinus Torvalds isec->initialized = 1; 13731da177e4SLinus Torvalds 13741da177e4SLinus Torvalds init_special_inode(inode, S_IFCHR | S_IRUGO | S_IWUGO, MKDEV(MEM_MAJOR, 3)); 13751da177e4SLinus Torvalds d_add(dentry, inode); 13761da177e4SLinus Torvalds selinux_null = dentry; 13771da177e4SLinus Torvalds 13781da177e4SLinus Torvalds dentry = d_alloc_name(sb->s_root, "avc"); 1379161ce45aSJames Morris if (!dentry) { 1380161ce45aSJames Morris ret = -ENOMEM; 1381161ce45aSJames Morris goto err; 1382161ce45aSJames Morris } 13831da177e4SLinus Torvalds 1384edb20fb5SJames Morris ret = sel_make_dir(root_inode, dentry); 13851da177e4SLinus Torvalds if (ret) 1386161ce45aSJames Morris goto err; 13871da177e4SLinus Torvalds 13881da177e4SLinus Torvalds ret = sel_make_avc_files(dentry); 13891da177e4SLinus Torvalds if (ret) 1390161ce45aSJames Morris goto err; 1391f0ee2e46SJames Carter 1392f0ee2e46SJames Carter dentry = d_alloc_name(sb->s_root, "initial_contexts"); 1393f0ee2e46SJames Carter if (!dentry) { 1394f0ee2e46SJames Carter ret = -ENOMEM; 1395f0ee2e46SJames Carter goto err; 1396f0ee2e46SJames Carter } 1397f0ee2e46SJames Carter 1398f0ee2e46SJames Carter ret = sel_make_dir(root_inode, dentry); 1399f0ee2e46SJames Carter if (ret) 1400f0ee2e46SJames Carter goto err; 1401f0ee2e46SJames Carter 1402f0ee2e46SJames Carter ret = sel_make_initcon_files(dentry); 1403f0ee2e46SJames Carter if (ret) 1404f0ee2e46SJames Carter goto err; 1405f0ee2e46SJames Carter 14061da177e4SLinus Torvalds out: 1407161ce45aSJames Morris return ret; 1408161ce45aSJames Morris err: 14091da177e4SLinus Torvalds printk(KERN_ERR "%s: failed while creating inodes\n", __FUNCTION__); 1410161ce45aSJames Morris goto out; 14111da177e4SLinus Torvalds } 14121da177e4SLinus Torvalds 1413454e2398SDavid Howells static int sel_get_sb(struct file_system_type *fs_type, 1414454e2398SDavid Howells int flags, const char *dev_name, void *data, 1415454e2398SDavid Howells struct vfsmount *mnt) 14161da177e4SLinus Torvalds { 1417454e2398SDavid Howells return get_sb_single(fs_type, flags, data, sel_fill_super, mnt); 14181da177e4SLinus Torvalds } 14191da177e4SLinus Torvalds 14201da177e4SLinus Torvalds static struct file_system_type sel_fs_type = { 14211da177e4SLinus Torvalds .name = "selinuxfs", 14221da177e4SLinus Torvalds .get_sb = sel_get_sb, 14231da177e4SLinus Torvalds .kill_sb = kill_litter_super, 14241da177e4SLinus Torvalds }; 14251da177e4SLinus Torvalds 14261da177e4SLinus Torvalds struct vfsmount *selinuxfs_mount; 14271da177e4SLinus Torvalds 14281da177e4SLinus Torvalds static int __init init_sel_fs(void) 14291da177e4SLinus Torvalds { 14301da177e4SLinus Torvalds int err; 14311da177e4SLinus Torvalds 14321da177e4SLinus Torvalds if (!selinux_enabled) 14331da177e4SLinus Torvalds return 0; 14341da177e4SLinus Torvalds err = register_filesystem(&sel_fs_type); 14351da177e4SLinus Torvalds if (!err) { 14361da177e4SLinus Torvalds selinuxfs_mount = kern_mount(&sel_fs_type); 14371da177e4SLinus Torvalds if (IS_ERR(selinuxfs_mount)) { 14381da177e4SLinus Torvalds printk(KERN_ERR "selinuxfs: could not mount!\n"); 14391da177e4SLinus Torvalds err = PTR_ERR(selinuxfs_mount); 14401da177e4SLinus Torvalds selinuxfs_mount = NULL; 14411da177e4SLinus Torvalds } 14421da177e4SLinus Torvalds } 14431da177e4SLinus Torvalds return err; 14441da177e4SLinus Torvalds } 14451da177e4SLinus Torvalds 14461da177e4SLinus Torvalds __initcall(init_sel_fs); 14471da177e4SLinus Torvalds 14481da177e4SLinus Torvalds #ifdef CONFIG_SECURITY_SELINUX_DISABLE 14491da177e4SLinus Torvalds void exit_sel_fs(void) 14501da177e4SLinus Torvalds { 14511da177e4SLinus Torvalds unregister_filesystem(&sel_fs_type); 14521da177e4SLinus Torvalds } 14531da177e4SLinus Torvalds #endif 1454