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 70e47c8fc5SChristopher J. PeBenito /* global data for classes */ 71e47c8fc5SChristopher J. PeBenito static struct dentry *class_dir = NULL; 72e47c8fc5SChristopher J. PeBenito static unsigned long last_class_ino; 73e47c8fc5SChristopher J. PeBenito 741da177e4SLinus Torvalds extern void selnl_notify_setenforce(int val); 751da177e4SLinus Torvalds 761da177e4SLinus Torvalds /* Check whether a task is allowed to use a security operation. */ 771da177e4SLinus Torvalds static int task_has_security(struct task_struct *tsk, 781da177e4SLinus Torvalds u32 perms) 791da177e4SLinus Torvalds { 801da177e4SLinus Torvalds struct task_security_struct *tsec; 811da177e4SLinus Torvalds 821da177e4SLinus Torvalds tsec = tsk->security; 831da177e4SLinus Torvalds if (!tsec) 841da177e4SLinus Torvalds return -EACCES; 851da177e4SLinus Torvalds 861da177e4SLinus Torvalds return avc_has_perm(tsec->sid, SECINITSID_SECURITY, 871da177e4SLinus Torvalds SECCLASS_SECURITY, perms, NULL); 881da177e4SLinus Torvalds } 891da177e4SLinus Torvalds 901da177e4SLinus Torvalds enum sel_inos { 911da177e4SLinus Torvalds SEL_ROOT_INO = 2, 921da177e4SLinus Torvalds SEL_LOAD, /* load policy */ 931da177e4SLinus Torvalds SEL_ENFORCE, /* get or set enforcing status */ 941da177e4SLinus Torvalds SEL_CONTEXT, /* validate context */ 951da177e4SLinus Torvalds SEL_ACCESS, /* compute access decision */ 961da177e4SLinus Torvalds SEL_CREATE, /* compute create labeling decision */ 971da177e4SLinus Torvalds SEL_RELABEL, /* compute relabeling decision */ 981da177e4SLinus Torvalds SEL_USER, /* compute reachable user contexts */ 991da177e4SLinus Torvalds SEL_POLICYVERS, /* return policy version for this kernel */ 1001da177e4SLinus Torvalds SEL_COMMIT_BOOLS, /* commit new boolean values */ 1011da177e4SLinus Torvalds SEL_MLS, /* return if MLS policy is enabled */ 1021da177e4SLinus Torvalds SEL_DISABLE, /* disable SELinux until next reboot */ 1031da177e4SLinus Torvalds SEL_MEMBER, /* compute polyinstantiation membership decision */ 1041da177e4SLinus Torvalds SEL_CHECKREQPROT, /* check requested protection, not kernel-applied one */ 1054e5ab4cbSJames Morris SEL_COMPAT_NET, /* whether to use old compat network packet controls */ 1063f12070eSEric Paris SEL_REJECT_UNKNOWN, /* export unknown reject handling to userspace */ 1073f12070eSEric Paris SEL_DENY_UNKNOWN, /* export unknown deny handling to userspace */ 1086174eafcSJames Carter SEL_INO_NEXT, /* The next inode number to use */ 1091da177e4SLinus Torvalds }; 1101da177e4SLinus Torvalds 1116174eafcSJames Carter static unsigned long sel_last_ino = SEL_INO_NEXT - 1; 1126174eafcSJames Carter 113f0ee2e46SJames Carter #define SEL_INITCON_INO_OFFSET 0x01000000 114bce34bc0SJames Carter #define SEL_BOOL_INO_OFFSET 0x02000000 115e47c8fc5SChristopher J. PeBenito #define SEL_CLASS_INO_OFFSET 0x04000000 116f0ee2e46SJames Carter #define SEL_INO_MASK 0x00ffffff 117f0ee2e46SJames Carter 1181da177e4SLinus Torvalds #define TMPBUFLEN 12 1191da177e4SLinus Torvalds static ssize_t sel_read_enforce(struct file *filp, char __user *buf, 1201da177e4SLinus Torvalds size_t count, loff_t *ppos) 1211da177e4SLinus Torvalds { 1221da177e4SLinus Torvalds char tmpbuf[TMPBUFLEN]; 1231da177e4SLinus Torvalds ssize_t length; 1241da177e4SLinus Torvalds 1251da177e4SLinus Torvalds length = scnprintf(tmpbuf, TMPBUFLEN, "%d", selinux_enforcing); 1261da177e4SLinus Torvalds return simple_read_from_buffer(buf, count, ppos, tmpbuf, length); 1271da177e4SLinus Torvalds } 1281da177e4SLinus Torvalds 1291da177e4SLinus Torvalds #ifdef CONFIG_SECURITY_SELINUX_DEVELOP 1301da177e4SLinus Torvalds static ssize_t sel_write_enforce(struct file * file, const char __user * buf, 1311da177e4SLinus Torvalds size_t count, loff_t *ppos) 1321da177e4SLinus Torvalds 1331da177e4SLinus Torvalds { 1341da177e4SLinus Torvalds char *page; 1351da177e4SLinus Torvalds ssize_t length; 1361da177e4SLinus Torvalds int new_value; 1371da177e4SLinus Torvalds 138bfd51626SDavi Arnaut if (count >= PAGE_SIZE) 1391da177e4SLinus Torvalds return -ENOMEM; 1401da177e4SLinus Torvalds if (*ppos != 0) { 1411da177e4SLinus Torvalds /* No partial writes. */ 1421da177e4SLinus Torvalds return -EINVAL; 1431da177e4SLinus Torvalds } 1441da177e4SLinus Torvalds page = (char*)get_zeroed_page(GFP_KERNEL); 1451da177e4SLinus Torvalds if (!page) 1461da177e4SLinus Torvalds return -ENOMEM; 1471da177e4SLinus Torvalds length = -EFAULT; 1481da177e4SLinus Torvalds if (copy_from_user(page, buf, count)) 1491da177e4SLinus Torvalds goto out; 1501da177e4SLinus Torvalds 1511da177e4SLinus Torvalds length = -EINVAL; 1521da177e4SLinus Torvalds if (sscanf(page, "%d", &new_value) != 1) 1531da177e4SLinus Torvalds goto out; 1541da177e4SLinus Torvalds 1551da177e4SLinus Torvalds if (new_value != selinux_enforcing) { 1561da177e4SLinus Torvalds length = task_has_security(current, SECURITY__SETENFORCE); 1571da177e4SLinus Torvalds if (length) 1581da177e4SLinus Torvalds goto out; 159af601e46SSteve Grubb audit_log(current->audit_context, GFP_KERNEL, AUDIT_MAC_STATUS, 160af601e46SSteve Grubb "enforcing=%d old_enforcing=%d auid=%u", new_value, 161af601e46SSteve Grubb selinux_enforcing, 162af601e46SSteve Grubb audit_get_loginuid(current->audit_context)); 1631da177e4SLinus Torvalds selinux_enforcing = new_value; 1641da177e4SLinus Torvalds if (selinux_enforcing) 1651da177e4SLinus Torvalds avc_ss_reset(0); 1661da177e4SLinus Torvalds selnl_notify_setenforce(selinux_enforcing); 1671da177e4SLinus Torvalds } 1681da177e4SLinus Torvalds length = count; 1691da177e4SLinus Torvalds out: 1701da177e4SLinus Torvalds free_page((unsigned long) page); 1711da177e4SLinus Torvalds return length; 1721da177e4SLinus Torvalds } 1731da177e4SLinus Torvalds #else 1741da177e4SLinus Torvalds #define sel_write_enforce NULL 1751da177e4SLinus Torvalds #endif 1761da177e4SLinus Torvalds 1779c2e08c5SArjan van de Ven static const struct file_operations sel_enforce_ops = { 1781da177e4SLinus Torvalds .read = sel_read_enforce, 1791da177e4SLinus Torvalds .write = sel_write_enforce, 1801da177e4SLinus Torvalds }; 1811da177e4SLinus Torvalds 1823f12070eSEric Paris static ssize_t sel_read_handle_unknown(struct file *filp, char __user *buf, 1833f12070eSEric Paris size_t count, loff_t *ppos) 1843f12070eSEric Paris { 1853f12070eSEric Paris char tmpbuf[TMPBUFLEN]; 1863f12070eSEric Paris ssize_t length; 1873f12070eSEric Paris ino_t ino = filp->f_path.dentry->d_inode->i_ino; 1883f12070eSEric Paris int handle_unknown = (ino == SEL_REJECT_UNKNOWN) ? 1893f12070eSEric Paris security_get_reject_unknown() : !security_get_allow_unknown(); 1903f12070eSEric Paris 1913f12070eSEric Paris length = scnprintf(tmpbuf, TMPBUFLEN, "%d", handle_unknown); 1923f12070eSEric Paris return simple_read_from_buffer(buf, count, ppos, tmpbuf, length); 1933f12070eSEric Paris } 1943f12070eSEric Paris 1953f12070eSEric Paris static const struct file_operations sel_handle_unknown_ops = { 1963f12070eSEric Paris .read = sel_read_handle_unknown, 1973f12070eSEric Paris }; 1983f12070eSEric Paris 1991da177e4SLinus Torvalds #ifdef CONFIG_SECURITY_SELINUX_DISABLE 2001da177e4SLinus Torvalds static ssize_t sel_write_disable(struct file * file, const char __user * buf, 2011da177e4SLinus Torvalds size_t count, loff_t *ppos) 2021da177e4SLinus Torvalds 2031da177e4SLinus Torvalds { 2041da177e4SLinus Torvalds char *page; 2051da177e4SLinus Torvalds ssize_t length; 2061da177e4SLinus Torvalds int new_value; 2071da177e4SLinus Torvalds extern int selinux_disable(void); 2081da177e4SLinus Torvalds 209bfd51626SDavi Arnaut if (count >= PAGE_SIZE) 2101da177e4SLinus Torvalds return -ENOMEM; 2111da177e4SLinus Torvalds if (*ppos != 0) { 2121da177e4SLinus Torvalds /* No partial writes. */ 2131da177e4SLinus Torvalds return -EINVAL; 2141da177e4SLinus Torvalds } 2151da177e4SLinus Torvalds page = (char*)get_zeroed_page(GFP_KERNEL); 2161da177e4SLinus Torvalds if (!page) 2171da177e4SLinus Torvalds return -ENOMEM; 2181da177e4SLinus Torvalds length = -EFAULT; 2191da177e4SLinus Torvalds if (copy_from_user(page, buf, count)) 2201da177e4SLinus Torvalds goto out; 2211da177e4SLinus Torvalds 2221da177e4SLinus Torvalds length = -EINVAL; 2231da177e4SLinus Torvalds if (sscanf(page, "%d", &new_value) != 1) 2241da177e4SLinus Torvalds goto out; 2251da177e4SLinus Torvalds 2261da177e4SLinus Torvalds if (new_value) { 2271da177e4SLinus Torvalds length = selinux_disable(); 2281da177e4SLinus Torvalds if (length < 0) 2291da177e4SLinus Torvalds goto out; 230af601e46SSteve Grubb audit_log(current->audit_context, GFP_KERNEL, AUDIT_MAC_STATUS, 231af601e46SSteve Grubb "selinux=0 auid=%u", 232af601e46SSteve Grubb audit_get_loginuid(current->audit_context)); 2331da177e4SLinus Torvalds } 2341da177e4SLinus Torvalds 2351da177e4SLinus Torvalds length = count; 2361da177e4SLinus Torvalds out: 2371da177e4SLinus Torvalds free_page((unsigned long) page); 2381da177e4SLinus Torvalds return length; 2391da177e4SLinus Torvalds } 2401da177e4SLinus Torvalds #else 2411da177e4SLinus Torvalds #define sel_write_disable NULL 2421da177e4SLinus Torvalds #endif 2431da177e4SLinus Torvalds 2449c2e08c5SArjan van de Ven static const struct file_operations sel_disable_ops = { 2451da177e4SLinus Torvalds .write = sel_write_disable, 2461da177e4SLinus Torvalds }; 2471da177e4SLinus Torvalds 2481da177e4SLinus Torvalds static ssize_t sel_read_policyvers(struct file *filp, char __user *buf, 2491da177e4SLinus Torvalds size_t count, loff_t *ppos) 2501da177e4SLinus Torvalds { 2511da177e4SLinus Torvalds char tmpbuf[TMPBUFLEN]; 2521da177e4SLinus Torvalds ssize_t length; 2531da177e4SLinus Torvalds 2541da177e4SLinus Torvalds length = scnprintf(tmpbuf, TMPBUFLEN, "%u", POLICYDB_VERSION_MAX); 2551da177e4SLinus Torvalds return simple_read_from_buffer(buf, count, ppos, tmpbuf, length); 2561da177e4SLinus Torvalds } 2571da177e4SLinus Torvalds 2589c2e08c5SArjan van de Ven static const struct file_operations sel_policyvers_ops = { 2591da177e4SLinus Torvalds .read = sel_read_policyvers, 2601da177e4SLinus Torvalds }; 2611da177e4SLinus Torvalds 2621da177e4SLinus Torvalds /* declaration for sel_write_load */ 2631da177e4SLinus Torvalds static int sel_make_bools(void); 264e47c8fc5SChristopher J. PeBenito static int sel_make_classes(void); 265e47c8fc5SChristopher J. PeBenito 266e47c8fc5SChristopher J. PeBenito /* declaration for sel_make_class_dirs */ 267e47c8fc5SChristopher J. PeBenito static int sel_make_dir(struct inode *dir, struct dentry *dentry, 268e47c8fc5SChristopher J. PeBenito unsigned long *ino); 2691da177e4SLinus Torvalds 2701da177e4SLinus Torvalds static ssize_t sel_read_mls(struct file *filp, char __user *buf, 2711da177e4SLinus Torvalds size_t count, loff_t *ppos) 2721da177e4SLinus Torvalds { 2731da177e4SLinus Torvalds char tmpbuf[TMPBUFLEN]; 2741da177e4SLinus Torvalds ssize_t length; 2751da177e4SLinus Torvalds 2761da177e4SLinus Torvalds length = scnprintf(tmpbuf, TMPBUFLEN, "%d", selinux_mls_enabled); 2771da177e4SLinus Torvalds return simple_read_from_buffer(buf, count, ppos, tmpbuf, length); 2781da177e4SLinus Torvalds } 2791da177e4SLinus Torvalds 2809c2e08c5SArjan van de Ven static const struct file_operations sel_mls_ops = { 2811da177e4SLinus Torvalds .read = sel_read_mls, 2821da177e4SLinus Torvalds }; 2831da177e4SLinus Torvalds 2841da177e4SLinus Torvalds static ssize_t sel_write_load(struct file * file, const char __user * buf, 2851da177e4SLinus Torvalds size_t count, loff_t *ppos) 2861da177e4SLinus Torvalds 2871da177e4SLinus Torvalds { 2881da177e4SLinus Torvalds int ret; 2891da177e4SLinus Torvalds ssize_t length; 2901da177e4SLinus Torvalds void *data = NULL; 2911da177e4SLinus Torvalds 292bb003079SIngo Molnar mutex_lock(&sel_mutex); 2931da177e4SLinus Torvalds 2941da177e4SLinus Torvalds length = task_has_security(current, SECURITY__LOAD_POLICY); 2951da177e4SLinus Torvalds if (length) 2961da177e4SLinus Torvalds goto out; 2971da177e4SLinus Torvalds 2981da177e4SLinus Torvalds if (*ppos != 0) { 2991da177e4SLinus Torvalds /* No partial writes. */ 3001da177e4SLinus Torvalds length = -EINVAL; 3011da177e4SLinus Torvalds goto out; 3021da177e4SLinus Torvalds } 3031da177e4SLinus Torvalds 304bfd51626SDavi Arnaut if ((count > 64 * 1024 * 1024) 3051da177e4SLinus Torvalds || (data = vmalloc(count)) == NULL) { 3061da177e4SLinus Torvalds length = -ENOMEM; 3071da177e4SLinus Torvalds goto out; 3081da177e4SLinus Torvalds } 3091da177e4SLinus Torvalds 3101da177e4SLinus Torvalds length = -EFAULT; 3111da177e4SLinus Torvalds if (copy_from_user(data, buf, count) != 0) 3121da177e4SLinus Torvalds goto out; 3131da177e4SLinus Torvalds 3141da177e4SLinus Torvalds length = security_load_policy(data, count); 3151da177e4SLinus Torvalds if (length) 3161da177e4SLinus Torvalds goto out; 3171da177e4SLinus Torvalds 3181da177e4SLinus Torvalds ret = sel_make_bools(); 319e47c8fc5SChristopher J. PeBenito if (ret) { 320e47c8fc5SChristopher J. PeBenito length = ret; 321e47c8fc5SChristopher J. PeBenito goto out1; 322e47c8fc5SChristopher J. PeBenito } 323e47c8fc5SChristopher J. PeBenito 324e47c8fc5SChristopher J. PeBenito ret = sel_make_classes(); 3251da177e4SLinus Torvalds if (ret) 3261da177e4SLinus Torvalds length = ret; 3271da177e4SLinus Torvalds else 3281da177e4SLinus Torvalds length = count; 329e47c8fc5SChristopher J. PeBenito 330e47c8fc5SChristopher J. PeBenito out1: 3313f12070eSEric Paris 3323f12070eSEric Paris printk(KERN_INFO "SELinux: policy loaded with handle_unknown=%s\n", 3333f12070eSEric Paris (security_get_reject_unknown() ? "reject" : 3343f12070eSEric Paris (security_get_allow_unknown() ? "allow" : "deny"))); 3353f12070eSEric Paris 336af601e46SSteve Grubb audit_log(current->audit_context, GFP_KERNEL, AUDIT_MAC_POLICY_LOAD, 337af601e46SSteve Grubb "policy loaded auid=%u", 338af601e46SSteve Grubb audit_get_loginuid(current->audit_context)); 3391da177e4SLinus Torvalds out: 340bb003079SIngo Molnar mutex_unlock(&sel_mutex); 3411da177e4SLinus Torvalds vfree(data); 3421da177e4SLinus Torvalds return length; 3431da177e4SLinus Torvalds } 3441da177e4SLinus Torvalds 3459c2e08c5SArjan van de Ven static const struct file_operations sel_load_ops = { 3461da177e4SLinus Torvalds .write = sel_write_load, 3471da177e4SLinus Torvalds }; 3481da177e4SLinus Torvalds 349ce9982d0SStephen Smalley static ssize_t sel_write_context(struct file * file, char *buf, size_t size) 3501da177e4SLinus Torvalds { 351ce9982d0SStephen Smalley char *canon; 352ce9982d0SStephen Smalley u32 sid, len; 3531da177e4SLinus Torvalds ssize_t length; 3541da177e4SLinus Torvalds 3551da177e4SLinus Torvalds length = task_has_security(current, SECURITY__CHECK_CONTEXT); 3561da177e4SLinus Torvalds if (length) 3571da177e4SLinus Torvalds return length; 3581da177e4SLinus Torvalds 359ce9982d0SStephen Smalley length = security_context_to_sid(buf, size, &sid); 3601da177e4SLinus Torvalds if (length < 0) 361ce9982d0SStephen Smalley return length; 3621da177e4SLinus Torvalds 363ce9982d0SStephen Smalley length = security_sid_to_context(sid, &canon, &len); 364ce9982d0SStephen Smalley if (length < 0) 365ce9982d0SStephen Smalley return length; 366ce9982d0SStephen Smalley 367ce9982d0SStephen Smalley if (len > SIMPLE_TRANSACTION_LIMIT) { 368ce9982d0SStephen Smalley printk(KERN_ERR "%s: context size (%u) exceeds payload " 369ce9982d0SStephen Smalley "max\n", __FUNCTION__, len); 370ce9982d0SStephen Smalley length = -ERANGE; 371ce9982d0SStephen Smalley goto out; 372ce9982d0SStephen Smalley } 373ce9982d0SStephen Smalley 374ce9982d0SStephen Smalley memcpy(buf, canon, len); 375ce9982d0SStephen Smalley length = len; 3761da177e4SLinus Torvalds out: 377ce9982d0SStephen Smalley kfree(canon); 3781da177e4SLinus Torvalds return length; 3791da177e4SLinus Torvalds } 3801da177e4SLinus Torvalds 3811da177e4SLinus Torvalds static ssize_t sel_read_checkreqprot(struct file *filp, char __user *buf, 3821da177e4SLinus Torvalds size_t count, loff_t *ppos) 3831da177e4SLinus Torvalds { 3841da177e4SLinus Torvalds char tmpbuf[TMPBUFLEN]; 3851da177e4SLinus Torvalds ssize_t length; 3861da177e4SLinus Torvalds 3871da177e4SLinus Torvalds length = scnprintf(tmpbuf, TMPBUFLEN, "%u", selinux_checkreqprot); 3881da177e4SLinus Torvalds return simple_read_from_buffer(buf, count, ppos, tmpbuf, length); 3891da177e4SLinus Torvalds } 3901da177e4SLinus Torvalds 3911da177e4SLinus Torvalds static ssize_t sel_write_checkreqprot(struct file * file, const char __user * buf, 3921da177e4SLinus Torvalds size_t count, loff_t *ppos) 3931da177e4SLinus Torvalds { 3941da177e4SLinus Torvalds char *page; 3951da177e4SLinus Torvalds ssize_t length; 3961da177e4SLinus Torvalds unsigned int new_value; 3971da177e4SLinus Torvalds 3981da177e4SLinus Torvalds length = task_has_security(current, SECURITY__SETCHECKREQPROT); 3991da177e4SLinus Torvalds if (length) 4001da177e4SLinus Torvalds return length; 4011da177e4SLinus Torvalds 402bfd51626SDavi Arnaut if (count >= PAGE_SIZE) 4031da177e4SLinus Torvalds return -ENOMEM; 4041da177e4SLinus Torvalds if (*ppos != 0) { 4051da177e4SLinus Torvalds /* No partial writes. */ 4061da177e4SLinus Torvalds return -EINVAL; 4071da177e4SLinus Torvalds } 4081da177e4SLinus Torvalds page = (char*)get_zeroed_page(GFP_KERNEL); 4091da177e4SLinus Torvalds if (!page) 4101da177e4SLinus Torvalds return -ENOMEM; 4111da177e4SLinus Torvalds length = -EFAULT; 4121da177e4SLinus Torvalds if (copy_from_user(page, buf, count)) 4131da177e4SLinus Torvalds goto out; 4141da177e4SLinus Torvalds 4151da177e4SLinus Torvalds length = -EINVAL; 4161da177e4SLinus Torvalds if (sscanf(page, "%u", &new_value) != 1) 4171da177e4SLinus Torvalds goto out; 4181da177e4SLinus Torvalds 4191da177e4SLinus Torvalds selinux_checkreqprot = new_value ? 1 : 0; 4201da177e4SLinus Torvalds length = count; 4211da177e4SLinus Torvalds out: 4221da177e4SLinus Torvalds free_page((unsigned long) page); 4231da177e4SLinus Torvalds return length; 4241da177e4SLinus Torvalds } 4259c2e08c5SArjan van de Ven static const struct file_operations sel_checkreqprot_ops = { 4261da177e4SLinus Torvalds .read = sel_read_checkreqprot, 4271da177e4SLinus Torvalds .write = sel_write_checkreqprot, 4281da177e4SLinus Torvalds }; 4291da177e4SLinus Torvalds 4304e5ab4cbSJames Morris static ssize_t sel_read_compat_net(struct file *filp, char __user *buf, 4314e5ab4cbSJames Morris size_t count, loff_t *ppos) 4324e5ab4cbSJames Morris { 4334e5ab4cbSJames Morris char tmpbuf[TMPBUFLEN]; 4344e5ab4cbSJames Morris ssize_t length; 4354e5ab4cbSJames Morris 4364e5ab4cbSJames Morris length = scnprintf(tmpbuf, TMPBUFLEN, "%d", selinux_compat_net); 4374e5ab4cbSJames Morris return simple_read_from_buffer(buf, count, ppos, tmpbuf, length); 4384e5ab4cbSJames Morris } 4394e5ab4cbSJames Morris 4404e5ab4cbSJames Morris static ssize_t sel_write_compat_net(struct file * file, const char __user * buf, 4414e5ab4cbSJames Morris size_t count, loff_t *ppos) 4424e5ab4cbSJames Morris { 4434e5ab4cbSJames Morris char *page; 4444e5ab4cbSJames Morris ssize_t length; 4454e5ab4cbSJames Morris int new_value; 4464e5ab4cbSJames Morris 4474e5ab4cbSJames Morris length = task_has_security(current, SECURITY__LOAD_POLICY); 4484e5ab4cbSJames Morris if (length) 4494e5ab4cbSJames Morris return length; 4504e5ab4cbSJames Morris 4514e5ab4cbSJames Morris if (count >= PAGE_SIZE) 4524e5ab4cbSJames Morris return -ENOMEM; 4534e5ab4cbSJames Morris if (*ppos != 0) { 4544e5ab4cbSJames Morris /* No partial writes. */ 4554e5ab4cbSJames Morris return -EINVAL; 4564e5ab4cbSJames Morris } 4574e5ab4cbSJames Morris page = (char*)get_zeroed_page(GFP_KERNEL); 4584e5ab4cbSJames Morris if (!page) 4594e5ab4cbSJames Morris return -ENOMEM; 4604e5ab4cbSJames Morris length = -EFAULT; 4614e5ab4cbSJames Morris if (copy_from_user(page, buf, count)) 4624e5ab4cbSJames Morris goto out; 4634e5ab4cbSJames Morris 4644e5ab4cbSJames Morris length = -EINVAL; 4654e5ab4cbSJames Morris if (sscanf(page, "%d", &new_value) != 1) 4664e5ab4cbSJames Morris goto out; 4674e5ab4cbSJames Morris 4684e5ab4cbSJames Morris selinux_compat_net = new_value ? 1 : 0; 4694e5ab4cbSJames Morris length = count; 4704e5ab4cbSJames Morris out: 4714e5ab4cbSJames Morris free_page((unsigned long) page); 4724e5ab4cbSJames Morris return length; 4734e5ab4cbSJames Morris } 4749c2e08c5SArjan van de Ven static const struct file_operations sel_compat_net_ops = { 4754e5ab4cbSJames Morris .read = sel_read_compat_net, 4764e5ab4cbSJames Morris .write = sel_write_compat_net, 4774e5ab4cbSJames Morris }; 4784e5ab4cbSJames Morris 4791da177e4SLinus Torvalds /* 4801da177e4SLinus Torvalds * Remaining nodes use transaction based IO methods like nfsd/nfsctl.c 4811da177e4SLinus Torvalds */ 4821da177e4SLinus Torvalds static ssize_t sel_write_access(struct file * file, char *buf, size_t size); 4831da177e4SLinus Torvalds static ssize_t sel_write_create(struct file * file, char *buf, size_t size); 4841da177e4SLinus Torvalds static ssize_t sel_write_relabel(struct file * file, char *buf, size_t size); 4851da177e4SLinus Torvalds static ssize_t sel_write_user(struct file * file, char *buf, size_t size); 4861da177e4SLinus Torvalds static ssize_t sel_write_member(struct file * file, char *buf, size_t size); 4871da177e4SLinus Torvalds 4881da177e4SLinus Torvalds static ssize_t (*write_op[])(struct file *, char *, size_t) = { 4891da177e4SLinus Torvalds [SEL_ACCESS] = sel_write_access, 4901da177e4SLinus Torvalds [SEL_CREATE] = sel_write_create, 4911da177e4SLinus Torvalds [SEL_RELABEL] = sel_write_relabel, 4921da177e4SLinus Torvalds [SEL_USER] = sel_write_user, 4931da177e4SLinus Torvalds [SEL_MEMBER] = sel_write_member, 494ce9982d0SStephen Smalley [SEL_CONTEXT] = sel_write_context, 4951da177e4SLinus Torvalds }; 4961da177e4SLinus Torvalds 4971da177e4SLinus Torvalds static ssize_t selinux_transaction_write(struct file *file, const char __user *buf, size_t size, loff_t *pos) 4981da177e4SLinus Torvalds { 4993d5ff529SJosef Sipek ino_t ino = file->f_path.dentry->d_inode->i_ino; 5001da177e4SLinus Torvalds char *data; 5011da177e4SLinus Torvalds ssize_t rv; 5021da177e4SLinus Torvalds 5036e20a64aSNicolas Kaiser if (ino >= ARRAY_SIZE(write_op) || !write_op[ino]) 5041da177e4SLinus Torvalds return -EINVAL; 5051da177e4SLinus Torvalds 5061da177e4SLinus Torvalds data = simple_transaction_get(file, buf, size); 5071da177e4SLinus Torvalds if (IS_ERR(data)) 5081da177e4SLinus Torvalds return PTR_ERR(data); 5091da177e4SLinus Torvalds 5101da177e4SLinus Torvalds rv = write_op[ino](file, data, size); 5111da177e4SLinus Torvalds if (rv>0) { 5121da177e4SLinus Torvalds simple_transaction_set(file, rv); 5131da177e4SLinus Torvalds rv = size; 5141da177e4SLinus Torvalds } 5151da177e4SLinus Torvalds return rv; 5161da177e4SLinus Torvalds } 5171da177e4SLinus Torvalds 5189c2e08c5SArjan van de Ven static const struct file_operations transaction_ops = { 5191da177e4SLinus Torvalds .write = selinux_transaction_write, 5201da177e4SLinus Torvalds .read = simple_transaction_read, 5211da177e4SLinus Torvalds .release = simple_transaction_release, 5221da177e4SLinus Torvalds }; 5231da177e4SLinus Torvalds 5241da177e4SLinus Torvalds /* 5251da177e4SLinus Torvalds * payload - write methods 5261da177e4SLinus Torvalds * If the method has a response, the response should be put in buf, 5271da177e4SLinus Torvalds * and the length returned. Otherwise return 0 or and -error. 5281da177e4SLinus Torvalds */ 5291da177e4SLinus Torvalds 5301da177e4SLinus Torvalds static ssize_t sel_write_access(struct file * file, char *buf, size_t size) 5311da177e4SLinus Torvalds { 5321da177e4SLinus Torvalds char *scon, *tcon; 5331da177e4SLinus Torvalds u32 ssid, tsid; 5341da177e4SLinus Torvalds u16 tclass; 5351da177e4SLinus Torvalds u32 req; 5361da177e4SLinus Torvalds struct av_decision avd; 5371da177e4SLinus Torvalds ssize_t length; 5381da177e4SLinus Torvalds 5391da177e4SLinus Torvalds length = task_has_security(current, SECURITY__COMPUTE_AV); 5401da177e4SLinus Torvalds if (length) 5411da177e4SLinus Torvalds return length; 5421da177e4SLinus Torvalds 5431da177e4SLinus Torvalds length = -ENOMEM; 54489d155efSJames Morris scon = kzalloc(size+1, GFP_KERNEL); 5451da177e4SLinus Torvalds if (!scon) 5461da177e4SLinus Torvalds return length; 5471da177e4SLinus Torvalds 54889d155efSJames Morris tcon = kzalloc(size+1, GFP_KERNEL); 5491da177e4SLinus Torvalds if (!tcon) 5501da177e4SLinus Torvalds goto out; 5511da177e4SLinus Torvalds 5521da177e4SLinus Torvalds length = -EINVAL; 5531da177e4SLinus Torvalds if (sscanf(buf, "%s %s %hu %x", scon, tcon, &tclass, &req) != 4) 5541da177e4SLinus Torvalds goto out2; 5551da177e4SLinus Torvalds 5561da177e4SLinus Torvalds length = security_context_to_sid(scon, strlen(scon)+1, &ssid); 5571da177e4SLinus Torvalds if (length < 0) 5581da177e4SLinus Torvalds goto out2; 5591da177e4SLinus Torvalds length = security_context_to_sid(tcon, strlen(tcon)+1, &tsid); 5601da177e4SLinus Torvalds if (length < 0) 5611da177e4SLinus Torvalds goto out2; 5621da177e4SLinus Torvalds 5631da177e4SLinus Torvalds length = security_compute_av(ssid, tsid, tclass, req, &avd); 5641da177e4SLinus Torvalds if (length < 0) 5651da177e4SLinus Torvalds goto out2; 5661da177e4SLinus Torvalds 5671da177e4SLinus Torvalds length = scnprintf(buf, SIMPLE_TRANSACTION_LIMIT, 5681da177e4SLinus Torvalds "%x %x %x %x %u", 5691da177e4SLinus Torvalds avd.allowed, avd.decided, 5701da177e4SLinus Torvalds avd.auditallow, avd.auditdeny, 5711da177e4SLinus Torvalds avd.seqno); 5721da177e4SLinus Torvalds out2: 5731da177e4SLinus Torvalds kfree(tcon); 5741da177e4SLinus Torvalds out: 5751da177e4SLinus Torvalds kfree(scon); 5761da177e4SLinus Torvalds return length; 5771da177e4SLinus Torvalds } 5781da177e4SLinus Torvalds 5791da177e4SLinus Torvalds static ssize_t sel_write_create(struct file * file, char *buf, size_t size) 5801da177e4SLinus Torvalds { 5811da177e4SLinus Torvalds char *scon, *tcon; 5821da177e4SLinus Torvalds u32 ssid, tsid, newsid; 5831da177e4SLinus Torvalds u16 tclass; 5841da177e4SLinus Torvalds ssize_t length; 5851da177e4SLinus Torvalds char *newcon; 5861da177e4SLinus Torvalds u32 len; 5871da177e4SLinus Torvalds 5881da177e4SLinus Torvalds length = task_has_security(current, SECURITY__COMPUTE_CREATE); 5891da177e4SLinus Torvalds if (length) 5901da177e4SLinus Torvalds return length; 5911da177e4SLinus Torvalds 5921da177e4SLinus Torvalds length = -ENOMEM; 59389d155efSJames Morris scon = kzalloc(size+1, GFP_KERNEL); 5941da177e4SLinus Torvalds if (!scon) 5951da177e4SLinus Torvalds return length; 5961da177e4SLinus Torvalds 59789d155efSJames Morris tcon = kzalloc(size+1, GFP_KERNEL); 5981da177e4SLinus Torvalds if (!tcon) 5991da177e4SLinus Torvalds goto out; 6001da177e4SLinus Torvalds 6011da177e4SLinus Torvalds length = -EINVAL; 6021da177e4SLinus Torvalds if (sscanf(buf, "%s %s %hu", scon, tcon, &tclass) != 3) 6031da177e4SLinus Torvalds goto out2; 6041da177e4SLinus Torvalds 6051da177e4SLinus Torvalds length = security_context_to_sid(scon, strlen(scon)+1, &ssid); 6061da177e4SLinus Torvalds if (length < 0) 6071da177e4SLinus Torvalds goto out2; 6081da177e4SLinus Torvalds length = security_context_to_sid(tcon, strlen(tcon)+1, &tsid); 6091da177e4SLinus Torvalds if (length < 0) 6101da177e4SLinus Torvalds goto out2; 6111da177e4SLinus Torvalds 6121da177e4SLinus Torvalds length = security_transition_sid(ssid, tsid, tclass, &newsid); 6131da177e4SLinus Torvalds if (length < 0) 6141da177e4SLinus Torvalds goto out2; 6151da177e4SLinus Torvalds 6161da177e4SLinus Torvalds length = security_sid_to_context(newsid, &newcon, &len); 6171da177e4SLinus Torvalds if (length < 0) 6181da177e4SLinus Torvalds goto out2; 6191da177e4SLinus Torvalds 6201da177e4SLinus Torvalds if (len > SIMPLE_TRANSACTION_LIMIT) { 6211da177e4SLinus Torvalds printk(KERN_ERR "%s: context size (%u) exceeds payload " 6221da177e4SLinus Torvalds "max\n", __FUNCTION__, len); 6231da177e4SLinus Torvalds length = -ERANGE; 6241da177e4SLinus Torvalds goto out3; 6251da177e4SLinus Torvalds } 6261da177e4SLinus Torvalds 6271da177e4SLinus Torvalds memcpy(buf, newcon, len); 6281da177e4SLinus Torvalds length = len; 6291da177e4SLinus Torvalds out3: 6301da177e4SLinus Torvalds kfree(newcon); 6311da177e4SLinus Torvalds out2: 6321da177e4SLinus Torvalds kfree(tcon); 6331da177e4SLinus Torvalds out: 6341da177e4SLinus Torvalds kfree(scon); 6351da177e4SLinus Torvalds return length; 6361da177e4SLinus Torvalds } 6371da177e4SLinus Torvalds 6381da177e4SLinus Torvalds static ssize_t sel_write_relabel(struct file * file, char *buf, size_t size) 6391da177e4SLinus Torvalds { 6401da177e4SLinus Torvalds char *scon, *tcon; 6411da177e4SLinus Torvalds u32 ssid, tsid, newsid; 6421da177e4SLinus Torvalds u16 tclass; 6431da177e4SLinus Torvalds ssize_t length; 6441da177e4SLinus Torvalds char *newcon; 6451da177e4SLinus Torvalds u32 len; 6461da177e4SLinus Torvalds 6471da177e4SLinus Torvalds length = task_has_security(current, SECURITY__COMPUTE_RELABEL); 6481da177e4SLinus Torvalds if (length) 6491da177e4SLinus Torvalds return length; 6501da177e4SLinus Torvalds 6511da177e4SLinus Torvalds length = -ENOMEM; 65289d155efSJames Morris scon = kzalloc(size+1, GFP_KERNEL); 6531da177e4SLinus Torvalds if (!scon) 6541da177e4SLinus Torvalds return length; 6551da177e4SLinus Torvalds 65689d155efSJames Morris tcon = kzalloc(size+1, GFP_KERNEL); 6571da177e4SLinus Torvalds if (!tcon) 6581da177e4SLinus Torvalds goto out; 6591da177e4SLinus Torvalds 6601da177e4SLinus Torvalds length = -EINVAL; 6611da177e4SLinus Torvalds if (sscanf(buf, "%s %s %hu", scon, tcon, &tclass) != 3) 6621da177e4SLinus Torvalds goto out2; 6631da177e4SLinus Torvalds 6641da177e4SLinus Torvalds length = security_context_to_sid(scon, strlen(scon)+1, &ssid); 6651da177e4SLinus Torvalds if (length < 0) 6661da177e4SLinus Torvalds goto out2; 6671da177e4SLinus Torvalds length = security_context_to_sid(tcon, strlen(tcon)+1, &tsid); 6681da177e4SLinus Torvalds if (length < 0) 6691da177e4SLinus Torvalds goto out2; 6701da177e4SLinus Torvalds 6711da177e4SLinus Torvalds length = security_change_sid(ssid, tsid, tclass, &newsid); 6721da177e4SLinus Torvalds if (length < 0) 6731da177e4SLinus Torvalds goto out2; 6741da177e4SLinus Torvalds 6751da177e4SLinus Torvalds length = security_sid_to_context(newsid, &newcon, &len); 6761da177e4SLinus Torvalds if (length < 0) 6771da177e4SLinus Torvalds goto out2; 6781da177e4SLinus Torvalds 6791da177e4SLinus Torvalds if (len > SIMPLE_TRANSACTION_LIMIT) { 6801da177e4SLinus Torvalds length = -ERANGE; 6811da177e4SLinus Torvalds goto out3; 6821da177e4SLinus Torvalds } 6831da177e4SLinus Torvalds 6841da177e4SLinus Torvalds memcpy(buf, newcon, len); 6851da177e4SLinus Torvalds length = len; 6861da177e4SLinus Torvalds out3: 6871da177e4SLinus Torvalds kfree(newcon); 6881da177e4SLinus Torvalds out2: 6891da177e4SLinus Torvalds kfree(tcon); 6901da177e4SLinus Torvalds out: 6911da177e4SLinus Torvalds kfree(scon); 6921da177e4SLinus Torvalds return length; 6931da177e4SLinus Torvalds } 6941da177e4SLinus Torvalds 6951da177e4SLinus Torvalds static ssize_t sel_write_user(struct file * file, char *buf, size_t size) 6961da177e4SLinus Torvalds { 6971da177e4SLinus Torvalds char *con, *user, *ptr; 6981da177e4SLinus Torvalds u32 sid, *sids; 6991da177e4SLinus Torvalds ssize_t length; 7001da177e4SLinus Torvalds char *newcon; 7011da177e4SLinus Torvalds int i, rc; 7021da177e4SLinus Torvalds u32 len, nsids; 7031da177e4SLinus Torvalds 7041da177e4SLinus Torvalds length = task_has_security(current, SECURITY__COMPUTE_USER); 7051da177e4SLinus Torvalds if (length) 7061da177e4SLinus Torvalds return length; 7071da177e4SLinus Torvalds 7081da177e4SLinus Torvalds length = -ENOMEM; 70989d155efSJames Morris con = kzalloc(size+1, GFP_KERNEL); 7101da177e4SLinus Torvalds if (!con) 7111da177e4SLinus Torvalds return length; 7121da177e4SLinus Torvalds 71389d155efSJames Morris user = kzalloc(size+1, GFP_KERNEL); 7141da177e4SLinus Torvalds if (!user) 7151da177e4SLinus Torvalds goto out; 7161da177e4SLinus Torvalds 7171da177e4SLinus Torvalds length = -EINVAL; 7181da177e4SLinus Torvalds if (sscanf(buf, "%s %s", con, user) != 2) 7191da177e4SLinus Torvalds goto out2; 7201da177e4SLinus Torvalds 7211da177e4SLinus Torvalds length = security_context_to_sid(con, strlen(con)+1, &sid); 7221da177e4SLinus Torvalds if (length < 0) 7231da177e4SLinus Torvalds goto out2; 7241da177e4SLinus Torvalds 7251da177e4SLinus Torvalds length = security_get_user_sids(sid, user, &sids, &nsids); 7261da177e4SLinus Torvalds if (length < 0) 7271da177e4SLinus Torvalds goto out2; 7281da177e4SLinus Torvalds 7291da177e4SLinus Torvalds length = sprintf(buf, "%u", nsids) + 1; 7301da177e4SLinus Torvalds ptr = buf + length; 7311da177e4SLinus Torvalds for (i = 0; i < nsids; i++) { 7321da177e4SLinus Torvalds rc = security_sid_to_context(sids[i], &newcon, &len); 7331da177e4SLinus Torvalds if (rc) { 7341da177e4SLinus Torvalds length = rc; 7351da177e4SLinus Torvalds goto out3; 7361da177e4SLinus Torvalds } 7371da177e4SLinus Torvalds if ((length + len) >= SIMPLE_TRANSACTION_LIMIT) { 7381da177e4SLinus Torvalds kfree(newcon); 7391da177e4SLinus Torvalds length = -ERANGE; 7401da177e4SLinus Torvalds goto out3; 7411da177e4SLinus Torvalds } 7421da177e4SLinus Torvalds memcpy(ptr, newcon, len); 7431da177e4SLinus Torvalds kfree(newcon); 7441da177e4SLinus Torvalds ptr += len; 7451da177e4SLinus Torvalds length += len; 7461da177e4SLinus Torvalds } 7471da177e4SLinus Torvalds out3: 7481da177e4SLinus Torvalds kfree(sids); 7491da177e4SLinus Torvalds out2: 7501da177e4SLinus Torvalds kfree(user); 7511da177e4SLinus Torvalds out: 7521da177e4SLinus Torvalds kfree(con); 7531da177e4SLinus Torvalds return length; 7541da177e4SLinus Torvalds } 7551da177e4SLinus Torvalds 7561da177e4SLinus Torvalds static ssize_t sel_write_member(struct file * file, char *buf, size_t size) 7571da177e4SLinus Torvalds { 7581da177e4SLinus Torvalds char *scon, *tcon; 7591da177e4SLinus Torvalds u32 ssid, tsid, newsid; 7601da177e4SLinus Torvalds u16 tclass; 7611da177e4SLinus Torvalds ssize_t length; 7621da177e4SLinus Torvalds char *newcon; 7631da177e4SLinus Torvalds u32 len; 7641da177e4SLinus Torvalds 7651da177e4SLinus Torvalds length = task_has_security(current, SECURITY__COMPUTE_MEMBER); 7661da177e4SLinus Torvalds if (length) 7671da177e4SLinus Torvalds return length; 7681da177e4SLinus Torvalds 7691da177e4SLinus Torvalds length = -ENOMEM; 77089d155efSJames Morris scon = kzalloc(size+1, GFP_KERNEL); 7711da177e4SLinus Torvalds if (!scon) 7721da177e4SLinus Torvalds return length; 7731da177e4SLinus Torvalds 77489d155efSJames Morris tcon = kzalloc(size+1, GFP_KERNEL); 7751da177e4SLinus Torvalds if (!tcon) 7761da177e4SLinus Torvalds goto out; 7771da177e4SLinus Torvalds 7781da177e4SLinus Torvalds length = -EINVAL; 7791da177e4SLinus Torvalds if (sscanf(buf, "%s %s %hu", scon, tcon, &tclass) != 3) 7801da177e4SLinus Torvalds goto out2; 7811da177e4SLinus Torvalds 7821da177e4SLinus Torvalds length = security_context_to_sid(scon, strlen(scon)+1, &ssid); 7831da177e4SLinus Torvalds if (length < 0) 7841da177e4SLinus Torvalds goto out2; 7851da177e4SLinus Torvalds length = security_context_to_sid(tcon, strlen(tcon)+1, &tsid); 7861da177e4SLinus Torvalds if (length < 0) 7871da177e4SLinus Torvalds goto out2; 7881da177e4SLinus Torvalds 7891da177e4SLinus Torvalds length = security_member_sid(ssid, tsid, tclass, &newsid); 7901da177e4SLinus Torvalds if (length < 0) 7911da177e4SLinus Torvalds goto out2; 7921da177e4SLinus Torvalds 7931da177e4SLinus Torvalds length = security_sid_to_context(newsid, &newcon, &len); 7941da177e4SLinus Torvalds if (length < 0) 7951da177e4SLinus Torvalds goto out2; 7961da177e4SLinus Torvalds 7971da177e4SLinus Torvalds if (len > SIMPLE_TRANSACTION_LIMIT) { 7981da177e4SLinus Torvalds printk(KERN_ERR "%s: context size (%u) exceeds payload " 7991da177e4SLinus Torvalds "max\n", __FUNCTION__, len); 8001da177e4SLinus Torvalds length = -ERANGE; 8011da177e4SLinus Torvalds goto out3; 8021da177e4SLinus Torvalds } 8031da177e4SLinus Torvalds 8041da177e4SLinus Torvalds memcpy(buf, newcon, len); 8051da177e4SLinus Torvalds length = len; 8061da177e4SLinus Torvalds out3: 8071da177e4SLinus Torvalds kfree(newcon); 8081da177e4SLinus Torvalds out2: 8091da177e4SLinus Torvalds kfree(tcon); 8101da177e4SLinus Torvalds out: 8111da177e4SLinus Torvalds kfree(scon); 8121da177e4SLinus Torvalds return length; 8131da177e4SLinus Torvalds } 8141da177e4SLinus Torvalds 8151da177e4SLinus Torvalds static struct inode *sel_make_inode(struct super_block *sb, int mode) 8161da177e4SLinus Torvalds { 8171da177e4SLinus Torvalds struct inode *ret = new_inode(sb); 8181da177e4SLinus Torvalds 8191da177e4SLinus Torvalds if (ret) { 8201da177e4SLinus Torvalds ret->i_mode = mode; 8211da177e4SLinus Torvalds ret->i_uid = ret->i_gid = 0; 8221da177e4SLinus Torvalds ret->i_blocks = 0; 8231da177e4SLinus Torvalds ret->i_atime = ret->i_mtime = ret->i_ctime = CURRENT_TIME; 8241da177e4SLinus Torvalds } 8251da177e4SLinus Torvalds return ret; 8261da177e4SLinus Torvalds } 8271da177e4SLinus Torvalds 8281da177e4SLinus Torvalds static ssize_t sel_read_bool(struct file *filep, char __user *buf, 8291da177e4SLinus Torvalds size_t count, loff_t *ppos) 8301da177e4SLinus Torvalds { 8311da177e4SLinus Torvalds char *page = NULL; 8321da177e4SLinus Torvalds ssize_t length; 8331da177e4SLinus Torvalds ssize_t ret; 8341da177e4SLinus Torvalds int cur_enforcing; 8351da177e4SLinus Torvalds struct inode *inode; 8361da177e4SLinus Torvalds 837bb003079SIngo Molnar mutex_lock(&sel_mutex); 8381da177e4SLinus Torvalds 8391da177e4SLinus Torvalds ret = -EFAULT; 8401da177e4SLinus Torvalds 841bfd51626SDavi Arnaut if (count > PAGE_SIZE) { 8421da177e4SLinus Torvalds ret = -EINVAL; 8431da177e4SLinus Torvalds goto out; 8441da177e4SLinus Torvalds } 8451da177e4SLinus Torvalds if (!(page = (char*)get_zeroed_page(GFP_KERNEL))) { 8461da177e4SLinus Torvalds ret = -ENOMEM; 8471da177e4SLinus Torvalds goto out; 8481da177e4SLinus Torvalds } 8491da177e4SLinus Torvalds 8503d5ff529SJosef Sipek inode = filep->f_path.dentry->d_inode; 851bce34bc0SJames Carter cur_enforcing = security_get_bool_value(inode->i_ino&SEL_INO_MASK); 8521da177e4SLinus Torvalds if (cur_enforcing < 0) { 8531da177e4SLinus Torvalds ret = cur_enforcing; 8541da177e4SLinus Torvalds goto out; 8551da177e4SLinus Torvalds } 8561da177e4SLinus Torvalds 8571da177e4SLinus Torvalds length = scnprintf(page, PAGE_SIZE, "%d %d", cur_enforcing, 858bce34bc0SJames Carter bool_pending_values[inode->i_ino&SEL_INO_MASK]); 85968bdcf28SStephen Smalley ret = simple_read_from_buffer(buf, count, ppos, page, length); 8601da177e4SLinus Torvalds out: 861bb003079SIngo Molnar mutex_unlock(&sel_mutex); 8621da177e4SLinus Torvalds if (page) 8631da177e4SLinus Torvalds free_page((unsigned long)page); 8641da177e4SLinus Torvalds return ret; 8651da177e4SLinus Torvalds } 8661da177e4SLinus Torvalds 8671da177e4SLinus Torvalds static ssize_t sel_write_bool(struct file *filep, const char __user *buf, 8681da177e4SLinus Torvalds size_t count, loff_t *ppos) 8691da177e4SLinus Torvalds { 8701da177e4SLinus Torvalds char *page = NULL; 8711da177e4SLinus Torvalds ssize_t length = -EFAULT; 8721da177e4SLinus Torvalds int new_value; 8731da177e4SLinus Torvalds struct inode *inode; 8741da177e4SLinus Torvalds 875bb003079SIngo Molnar mutex_lock(&sel_mutex); 8761da177e4SLinus Torvalds 8771da177e4SLinus Torvalds length = task_has_security(current, SECURITY__SETBOOL); 8781da177e4SLinus Torvalds if (length) 8791da177e4SLinus Torvalds goto out; 8801da177e4SLinus Torvalds 881bfd51626SDavi Arnaut if (count >= PAGE_SIZE) { 8821da177e4SLinus Torvalds length = -ENOMEM; 8831da177e4SLinus Torvalds goto out; 8841da177e4SLinus Torvalds } 8851da177e4SLinus Torvalds if (*ppos != 0) { 8861da177e4SLinus Torvalds /* No partial writes. */ 8871da177e4SLinus Torvalds goto out; 8881da177e4SLinus Torvalds } 8891da177e4SLinus Torvalds page = (char*)get_zeroed_page(GFP_KERNEL); 8901da177e4SLinus Torvalds if (!page) { 8911da177e4SLinus Torvalds length = -ENOMEM; 8921da177e4SLinus Torvalds goto out; 8931da177e4SLinus Torvalds } 8941da177e4SLinus Torvalds 8951da177e4SLinus Torvalds if (copy_from_user(page, buf, count)) 8961da177e4SLinus Torvalds goto out; 8971da177e4SLinus Torvalds 8981da177e4SLinus Torvalds length = -EINVAL; 8991da177e4SLinus Torvalds if (sscanf(page, "%d", &new_value) != 1) 9001da177e4SLinus Torvalds goto out; 9011da177e4SLinus Torvalds 9021da177e4SLinus Torvalds if (new_value) 9031da177e4SLinus Torvalds new_value = 1; 9041da177e4SLinus Torvalds 9053d5ff529SJosef Sipek inode = filep->f_path.dentry->d_inode; 906bce34bc0SJames Carter bool_pending_values[inode->i_ino&SEL_INO_MASK] = new_value; 9071da177e4SLinus Torvalds length = count; 9081da177e4SLinus Torvalds 9091da177e4SLinus Torvalds out: 910bb003079SIngo Molnar mutex_unlock(&sel_mutex); 9111da177e4SLinus Torvalds if (page) 9121da177e4SLinus Torvalds free_page((unsigned long) page); 9131da177e4SLinus Torvalds return length; 9141da177e4SLinus Torvalds } 9151da177e4SLinus Torvalds 9169c2e08c5SArjan van de Ven static const struct file_operations sel_bool_ops = { 9171da177e4SLinus Torvalds .read = sel_read_bool, 9181da177e4SLinus Torvalds .write = sel_write_bool, 9191da177e4SLinus Torvalds }; 9201da177e4SLinus Torvalds 9211da177e4SLinus Torvalds static ssize_t sel_commit_bools_write(struct file *filep, 9221da177e4SLinus Torvalds const char __user *buf, 9231da177e4SLinus Torvalds size_t count, loff_t *ppos) 9241da177e4SLinus Torvalds { 9251da177e4SLinus Torvalds char *page = NULL; 9261da177e4SLinus Torvalds ssize_t length = -EFAULT; 9271da177e4SLinus Torvalds int new_value; 9281da177e4SLinus Torvalds 929bb003079SIngo Molnar mutex_lock(&sel_mutex); 9301da177e4SLinus Torvalds 9311da177e4SLinus Torvalds length = task_has_security(current, SECURITY__SETBOOL); 9321da177e4SLinus Torvalds if (length) 9331da177e4SLinus Torvalds goto out; 9341da177e4SLinus Torvalds 935bfd51626SDavi Arnaut if (count >= PAGE_SIZE) { 9361da177e4SLinus Torvalds length = -ENOMEM; 9371da177e4SLinus Torvalds goto out; 9381da177e4SLinus Torvalds } 9391da177e4SLinus Torvalds if (*ppos != 0) { 9401da177e4SLinus Torvalds /* No partial writes. */ 9411da177e4SLinus Torvalds goto out; 9421da177e4SLinus Torvalds } 9431da177e4SLinus Torvalds page = (char*)get_zeroed_page(GFP_KERNEL); 9441da177e4SLinus Torvalds if (!page) { 9451da177e4SLinus Torvalds length = -ENOMEM; 9461da177e4SLinus Torvalds goto out; 9471da177e4SLinus Torvalds } 9481da177e4SLinus Torvalds 9491da177e4SLinus Torvalds if (copy_from_user(page, buf, count)) 9501da177e4SLinus Torvalds goto out; 9511da177e4SLinus Torvalds 9521da177e4SLinus Torvalds length = -EINVAL; 9531da177e4SLinus Torvalds if (sscanf(page, "%d", &new_value) != 1) 9541da177e4SLinus Torvalds goto out; 9551da177e4SLinus Torvalds 95620c19e41SDavi Arnaut if (new_value && bool_pending_values) { 9571da177e4SLinus Torvalds security_set_bools(bool_num, bool_pending_values); 9581da177e4SLinus Torvalds } 9591da177e4SLinus Torvalds 9601da177e4SLinus Torvalds length = count; 9611da177e4SLinus Torvalds 9621da177e4SLinus Torvalds out: 963bb003079SIngo Molnar mutex_unlock(&sel_mutex); 9641da177e4SLinus Torvalds if (page) 9651da177e4SLinus Torvalds free_page((unsigned long) page); 9661da177e4SLinus Torvalds return length; 9671da177e4SLinus Torvalds } 9681da177e4SLinus Torvalds 9699c2e08c5SArjan van de Ven static const struct file_operations sel_commit_bools_ops = { 9701da177e4SLinus Torvalds .write = sel_commit_bools_write, 9711da177e4SLinus Torvalds }; 9721da177e4SLinus Torvalds 9730c92d7c7SChristopher J. PeBenito static void sel_remove_entries(struct dentry *de) 9741da177e4SLinus Torvalds { 9750955dc03SStephen Smalley struct list_head *node; 9761da177e4SLinus Torvalds 9771da177e4SLinus Torvalds spin_lock(&dcache_lock); 9781da177e4SLinus Torvalds node = de->d_subdirs.next; 9791da177e4SLinus Torvalds while (node != &de->d_subdirs) { 9805160ee6fSEric Dumazet struct dentry *d = list_entry(node, struct dentry, d_u.d_child); 9811da177e4SLinus Torvalds list_del_init(node); 9821da177e4SLinus Torvalds 9831da177e4SLinus Torvalds if (d->d_inode) { 9841da177e4SLinus Torvalds d = dget_locked(d); 9851da177e4SLinus Torvalds spin_unlock(&dcache_lock); 9861da177e4SLinus Torvalds d_delete(d); 9871da177e4SLinus Torvalds simple_unlink(de->d_inode, d); 9881da177e4SLinus Torvalds dput(d); 9891da177e4SLinus Torvalds spin_lock(&dcache_lock); 9901da177e4SLinus Torvalds } 9911da177e4SLinus Torvalds node = de->d_subdirs.next; 9921da177e4SLinus Torvalds } 9931da177e4SLinus Torvalds 9941da177e4SLinus Torvalds spin_unlock(&dcache_lock); 9951da177e4SLinus Torvalds } 9961da177e4SLinus Torvalds 9971da177e4SLinus Torvalds #define BOOL_DIR_NAME "booleans" 9981da177e4SLinus Torvalds 9991da177e4SLinus Torvalds static int sel_make_bools(void) 10001da177e4SLinus Torvalds { 10011da177e4SLinus Torvalds int i, ret = 0; 10021da177e4SLinus Torvalds ssize_t len; 10031da177e4SLinus Torvalds struct dentry *dentry = NULL; 10041da177e4SLinus Torvalds struct dentry *dir = bool_dir; 10051da177e4SLinus Torvalds struct inode *inode = NULL; 10061da177e4SLinus Torvalds struct inode_security_struct *isec; 10071da177e4SLinus Torvalds char **names = NULL, *page; 10081da177e4SLinus Torvalds int num; 10091da177e4SLinus Torvalds int *values = NULL; 10101da177e4SLinus Torvalds u32 sid; 10111da177e4SLinus Torvalds 10121da177e4SLinus Torvalds /* remove any existing files */ 10131da177e4SLinus Torvalds kfree(bool_pending_values); 101420c19e41SDavi Arnaut bool_pending_values = NULL; 10151da177e4SLinus Torvalds 10160c92d7c7SChristopher J. PeBenito sel_remove_entries(dir); 10171da177e4SLinus Torvalds 10181da177e4SLinus Torvalds if (!(page = (char*)get_zeroed_page(GFP_KERNEL))) 10191da177e4SLinus Torvalds return -ENOMEM; 10201da177e4SLinus Torvalds 10211da177e4SLinus Torvalds ret = security_get_bools(&num, &names, &values); 10221da177e4SLinus Torvalds if (ret != 0) 10231da177e4SLinus Torvalds goto out; 10241da177e4SLinus Torvalds 10251da177e4SLinus Torvalds for (i = 0; i < num; i++) { 10261da177e4SLinus Torvalds dentry = d_alloc_name(dir, names[i]); 10271da177e4SLinus Torvalds if (!dentry) { 10281da177e4SLinus Torvalds ret = -ENOMEM; 10291da177e4SLinus Torvalds goto err; 10301da177e4SLinus Torvalds } 10311da177e4SLinus Torvalds inode = sel_make_inode(dir->d_sb, S_IFREG | S_IRUGO | S_IWUSR); 10321da177e4SLinus Torvalds if (!inode) { 10331da177e4SLinus Torvalds ret = -ENOMEM; 10341da177e4SLinus Torvalds goto err; 10351da177e4SLinus Torvalds } 10361da177e4SLinus Torvalds 10371da177e4SLinus Torvalds len = snprintf(page, PAGE_SIZE, "/%s/%s", BOOL_DIR_NAME, names[i]); 10381da177e4SLinus Torvalds if (len < 0) { 10391da177e4SLinus Torvalds ret = -EINVAL; 10401da177e4SLinus Torvalds goto err; 10411da177e4SLinus Torvalds } else if (len >= PAGE_SIZE) { 10421da177e4SLinus Torvalds ret = -ENAMETOOLONG; 10431da177e4SLinus Torvalds goto err; 10441da177e4SLinus Torvalds } 10451da177e4SLinus Torvalds isec = (struct inode_security_struct*)inode->i_security; 10461da177e4SLinus Torvalds if ((ret = security_genfs_sid("selinuxfs", page, SECCLASS_FILE, &sid))) 10471da177e4SLinus Torvalds goto err; 10481da177e4SLinus Torvalds isec->sid = sid; 10491da177e4SLinus Torvalds isec->initialized = 1; 10501da177e4SLinus Torvalds inode->i_fop = &sel_bool_ops; 1051bce34bc0SJames Carter inode->i_ino = i|SEL_BOOL_INO_OFFSET; 10521da177e4SLinus Torvalds d_add(dentry, inode); 10531da177e4SLinus Torvalds } 10541da177e4SLinus Torvalds bool_num = num; 10551da177e4SLinus Torvalds bool_pending_values = values; 10561da177e4SLinus Torvalds out: 10571da177e4SLinus Torvalds free_page((unsigned long)page); 10581da177e4SLinus Torvalds if (names) { 10599a5f04bfSJesper Juhl for (i = 0; i < num; i++) 10601da177e4SLinus Torvalds kfree(names[i]); 10611da177e4SLinus Torvalds kfree(names); 10621da177e4SLinus Torvalds } 10631da177e4SLinus Torvalds return ret; 10641da177e4SLinus Torvalds err: 106520c19e41SDavi Arnaut kfree(values); 10660c92d7c7SChristopher J. PeBenito sel_remove_entries(dir); 10671da177e4SLinus Torvalds ret = -ENOMEM; 10681da177e4SLinus Torvalds goto out; 10691da177e4SLinus Torvalds } 10701da177e4SLinus Torvalds 10711da177e4SLinus Torvalds #define NULL_FILE_NAME "null" 10721da177e4SLinus Torvalds 10731da177e4SLinus Torvalds struct dentry *selinux_null = NULL; 10741da177e4SLinus Torvalds 10751da177e4SLinus Torvalds static ssize_t sel_read_avc_cache_threshold(struct file *filp, char __user *buf, 10761da177e4SLinus Torvalds size_t count, loff_t *ppos) 10771da177e4SLinus Torvalds { 10781da177e4SLinus Torvalds char tmpbuf[TMPBUFLEN]; 10791da177e4SLinus Torvalds ssize_t length; 10801da177e4SLinus Torvalds 10811da177e4SLinus Torvalds length = scnprintf(tmpbuf, TMPBUFLEN, "%u", avc_cache_threshold); 10821da177e4SLinus Torvalds return simple_read_from_buffer(buf, count, ppos, tmpbuf, length); 10831da177e4SLinus Torvalds } 10841da177e4SLinus Torvalds 10851da177e4SLinus Torvalds static ssize_t sel_write_avc_cache_threshold(struct file * file, 10861da177e4SLinus Torvalds const char __user * buf, 10871da177e4SLinus Torvalds size_t count, loff_t *ppos) 10881da177e4SLinus Torvalds 10891da177e4SLinus Torvalds { 10901da177e4SLinus Torvalds char *page; 10911da177e4SLinus Torvalds ssize_t ret; 10921da177e4SLinus Torvalds int new_value; 10931da177e4SLinus Torvalds 1094bfd51626SDavi Arnaut if (count >= PAGE_SIZE) { 10951da177e4SLinus Torvalds ret = -ENOMEM; 10961da177e4SLinus Torvalds goto out; 10971da177e4SLinus Torvalds } 10981da177e4SLinus Torvalds 10991da177e4SLinus Torvalds if (*ppos != 0) { 11001da177e4SLinus Torvalds /* No partial writes. */ 11011da177e4SLinus Torvalds ret = -EINVAL; 11021da177e4SLinus Torvalds goto out; 11031da177e4SLinus Torvalds } 11041da177e4SLinus Torvalds 11051da177e4SLinus Torvalds page = (char*)get_zeroed_page(GFP_KERNEL); 11061da177e4SLinus Torvalds if (!page) { 11071da177e4SLinus Torvalds ret = -ENOMEM; 11081da177e4SLinus Torvalds goto out; 11091da177e4SLinus Torvalds } 11101da177e4SLinus Torvalds 11111da177e4SLinus Torvalds if (copy_from_user(page, buf, count)) { 11121da177e4SLinus Torvalds ret = -EFAULT; 11131da177e4SLinus Torvalds goto out_free; 11141da177e4SLinus Torvalds } 11151da177e4SLinus Torvalds 11161da177e4SLinus Torvalds if (sscanf(page, "%u", &new_value) != 1) { 11171da177e4SLinus Torvalds ret = -EINVAL; 11181da177e4SLinus Torvalds goto out; 11191da177e4SLinus Torvalds } 11201da177e4SLinus Torvalds 11211da177e4SLinus Torvalds if (new_value != avc_cache_threshold) { 11221da177e4SLinus Torvalds ret = task_has_security(current, SECURITY__SETSECPARAM); 11231da177e4SLinus Torvalds if (ret) 11241da177e4SLinus Torvalds goto out_free; 11251da177e4SLinus Torvalds avc_cache_threshold = new_value; 11261da177e4SLinus Torvalds } 11271da177e4SLinus Torvalds ret = count; 11281da177e4SLinus Torvalds out_free: 11291da177e4SLinus Torvalds free_page((unsigned long)page); 11301da177e4SLinus Torvalds out: 11311da177e4SLinus Torvalds return ret; 11321da177e4SLinus Torvalds } 11331da177e4SLinus Torvalds 11341da177e4SLinus Torvalds static ssize_t sel_read_avc_hash_stats(struct file *filp, char __user *buf, 11351da177e4SLinus Torvalds size_t count, loff_t *ppos) 11361da177e4SLinus Torvalds { 11371da177e4SLinus Torvalds char *page; 11381da177e4SLinus Torvalds ssize_t ret = 0; 11391da177e4SLinus Torvalds 11401da177e4SLinus Torvalds page = (char *)__get_free_page(GFP_KERNEL); 11411da177e4SLinus Torvalds if (!page) { 11421da177e4SLinus Torvalds ret = -ENOMEM; 11431da177e4SLinus Torvalds goto out; 11441da177e4SLinus Torvalds } 11451da177e4SLinus Torvalds ret = avc_get_hash_stats(page); 11461da177e4SLinus Torvalds if (ret >= 0) 11471da177e4SLinus Torvalds ret = simple_read_from_buffer(buf, count, ppos, page, ret); 11481da177e4SLinus Torvalds free_page((unsigned long)page); 11491da177e4SLinus Torvalds out: 11501da177e4SLinus Torvalds return ret; 11511da177e4SLinus Torvalds } 11521da177e4SLinus Torvalds 11539c2e08c5SArjan van de Ven static const struct file_operations sel_avc_cache_threshold_ops = { 11541da177e4SLinus Torvalds .read = sel_read_avc_cache_threshold, 11551da177e4SLinus Torvalds .write = sel_write_avc_cache_threshold, 11561da177e4SLinus Torvalds }; 11571da177e4SLinus Torvalds 11589c2e08c5SArjan van de Ven static const struct file_operations sel_avc_hash_stats_ops = { 11591da177e4SLinus Torvalds .read = sel_read_avc_hash_stats, 11601da177e4SLinus Torvalds }; 11611da177e4SLinus Torvalds 11621da177e4SLinus Torvalds #ifdef CONFIG_SECURITY_SELINUX_AVC_STATS 11631da177e4SLinus Torvalds static struct avc_cache_stats *sel_avc_get_stat_idx(loff_t *idx) 11641da177e4SLinus Torvalds { 11651da177e4SLinus Torvalds int cpu; 11661da177e4SLinus Torvalds 11671da177e4SLinus Torvalds for (cpu = *idx; cpu < NR_CPUS; ++cpu) { 11681da177e4SLinus Torvalds if (!cpu_possible(cpu)) 11691da177e4SLinus Torvalds continue; 11701da177e4SLinus Torvalds *idx = cpu + 1; 11711da177e4SLinus Torvalds return &per_cpu(avc_cache_stats, cpu); 11721da177e4SLinus Torvalds } 11731da177e4SLinus Torvalds return NULL; 11741da177e4SLinus Torvalds } 11751da177e4SLinus Torvalds 11761da177e4SLinus Torvalds static void *sel_avc_stats_seq_start(struct seq_file *seq, loff_t *pos) 11771da177e4SLinus Torvalds { 11781da177e4SLinus Torvalds loff_t n = *pos - 1; 11791da177e4SLinus Torvalds 11801da177e4SLinus Torvalds if (*pos == 0) 11811da177e4SLinus Torvalds return SEQ_START_TOKEN; 11821da177e4SLinus Torvalds 11831da177e4SLinus Torvalds return sel_avc_get_stat_idx(&n); 11841da177e4SLinus Torvalds } 11851da177e4SLinus Torvalds 11861da177e4SLinus Torvalds static void *sel_avc_stats_seq_next(struct seq_file *seq, void *v, loff_t *pos) 11871da177e4SLinus Torvalds { 11881da177e4SLinus Torvalds return sel_avc_get_stat_idx(pos); 11891da177e4SLinus Torvalds } 11901da177e4SLinus Torvalds 11911da177e4SLinus Torvalds static int sel_avc_stats_seq_show(struct seq_file *seq, void *v) 11921da177e4SLinus Torvalds { 11931da177e4SLinus Torvalds struct avc_cache_stats *st = v; 11941da177e4SLinus Torvalds 11951da177e4SLinus Torvalds if (v == SEQ_START_TOKEN) 11961da177e4SLinus Torvalds seq_printf(seq, "lookups hits misses allocations reclaims " 11971da177e4SLinus Torvalds "frees\n"); 11981da177e4SLinus Torvalds else 11991da177e4SLinus Torvalds seq_printf(seq, "%u %u %u %u %u %u\n", st->lookups, 12001da177e4SLinus Torvalds st->hits, st->misses, st->allocations, 12011da177e4SLinus Torvalds st->reclaims, st->frees); 12021da177e4SLinus Torvalds return 0; 12031da177e4SLinus Torvalds } 12041da177e4SLinus Torvalds 12051da177e4SLinus Torvalds static void sel_avc_stats_seq_stop(struct seq_file *seq, void *v) 12061da177e4SLinus Torvalds { } 12071da177e4SLinus Torvalds 12081da177e4SLinus Torvalds static struct seq_operations sel_avc_cache_stats_seq_ops = { 12091da177e4SLinus Torvalds .start = sel_avc_stats_seq_start, 12101da177e4SLinus Torvalds .next = sel_avc_stats_seq_next, 12111da177e4SLinus Torvalds .show = sel_avc_stats_seq_show, 12121da177e4SLinus Torvalds .stop = sel_avc_stats_seq_stop, 12131da177e4SLinus Torvalds }; 12141da177e4SLinus Torvalds 12151da177e4SLinus Torvalds static int sel_open_avc_cache_stats(struct inode *inode, struct file *file) 12161da177e4SLinus Torvalds { 12171da177e4SLinus Torvalds return seq_open(file, &sel_avc_cache_stats_seq_ops); 12181da177e4SLinus Torvalds } 12191da177e4SLinus Torvalds 12209c2e08c5SArjan van de Ven static const struct file_operations sel_avc_cache_stats_ops = { 12211da177e4SLinus Torvalds .open = sel_open_avc_cache_stats, 12221da177e4SLinus Torvalds .read = seq_read, 12231da177e4SLinus Torvalds .llseek = seq_lseek, 12241da177e4SLinus Torvalds .release = seq_release, 12251da177e4SLinus Torvalds }; 12261da177e4SLinus Torvalds #endif 12271da177e4SLinus Torvalds 12281da177e4SLinus Torvalds static int sel_make_avc_files(struct dentry *dir) 12291da177e4SLinus Torvalds { 12301da177e4SLinus Torvalds int i, ret = 0; 12311da177e4SLinus Torvalds static struct tree_descr files[] = { 12321da177e4SLinus Torvalds { "cache_threshold", 12331da177e4SLinus Torvalds &sel_avc_cache_threshold_ops, S_IRUGO|S_IWUSR }, 12341da177e4SLinus Torvalds { "hash_stats", &sel_avc_hash_stats_ops, S_IRUGO }, 12351da177e4SLinus Torvalds #ifdef CONFIG_SECURITY_SELINUX_AVC_STATS 12361da177e4SLinus Torvalds { "cache_stats", &sel_avc_cache_stats_ops, S_IRUGO }, 12371da177e4SLinus Torvalds #endif 12381da177e4SLinus Torvalds }; 12391da177e4SLinus Torvalds 12406e20a64aSNicolas Kaiser for (i = 0; i < ARRAY_SIZE(files); i++) { 12411da177e4SLinus Torvalds struct inode *inode; 12421da177e4SLinus Torvalds struct dentry *dentry; 12431da177e4SLinus Torvalds 12441da177e4SLinus Torvalds dentry = d_alloc_name(dir, files[i].name); 12451da177e4SLinus Torvalds if (!dentry) { 12461da177e4SLinus Torvalds ret = -ENOMEM; 1247d6aafa65SJames Morris goto out; 12481da177e4SLinus Torvalds } 12491da177e4SLinus Torvalds 12501da177e4SLinus Torvalds inode = sel_make_inode(dir->d_sb, S_IFREG|files[i].mode); 12511da177e4SLinus Torvalds if (!inode) { 12521da177e4SLinus Torvalds ret = -ENOMEM; 1253d6aafa65SJames Morris goto out; 12541da177e4SLinus Torvalds } 12551da177e4SLinus Torvalds inode->i_fop = files[i].ops; 12566174eafcSJames Carter inode->i_ino = ++sel_last_ino; 12571da177e4SLinus Torvalds d_add(dentry, inode); 12581da177e4SLinus Torvalds } 12591da177e4SLinus Torvalds out: 12601da177e4SLinus Torvalds return ret; 12611da177e4SLinus Torvalds } 12621da177e4SLinus Torvalds 1263f0ee2e46SJames Carter static ssize_t sel_read_initcon(struct file * file, char __user *buf, 1264f0ee2e46SJames Carter size_t count, loff_t *ppos) 1265f0ee2e46SJames Carter { 1266f0ee2e46SJames Carter struct inode *inode; 1267f0ee2e46SJames Carter char *con; 1268f0ee2e46SJames Carter u32 sid, len; 1269f0ee2e46SJames Carter ssize_t ret; 1270f0ee2e46SJames Carter 1271f0ee2e46SJames Carter inode = file->f_path.dentry->d_inode; 1272f0ee2e46SJames Carter sid = inode->i_ino&SEL_INO_MASK; 1273f0ee2e46SJames Carter ret = security_sid_to_context(sid, &con, &len); 1274f0ee2e46SJames Carter if (ret < 0) 1275f0ee2e46SJames Carter return ret; 1276f0ee2e46SJames Carter 1277f0ee2e46SJames Carter ret = simple_read_from_buffer(buf, count, ppos, con, len); 1278f0ee2e46SJames Carter kfree(con); 1279f0ee2e46SJames Carter return ret; 1280f0ee2e46SJames Carter } 1281f0ee2e46SJames Carter 1282f0ee2e46SJames Carter static const struct file_operations sel_initcon_ops = { 1283f0ee2e46SJames Carter .read = sel_read_initcon, 1284f0ee2e46SJames Carter }; 1285f0ee2e46SJames Carter 1286f0ee2e46SJames Carter static int sel_make_initcon_files(struct dentry *dir) 1287f0ee2e46SJames Carter { 1288f0ee2e46SJames Carter int i, ret = 0; 1289f0ee2e46SJames Carter 1290f0ee2e46SJames Carter for (i = 1; i <= SECINITSID_NUM; i++) { 1291f0ee2e46SJames Carter struct inode *inode; 1292f0ee2e46SJames Carter struct dentry *dentry; 1293f0ee2e46SJames Carter dentry = d_alloc_name(dir, security_get_initial_sid_context(i)); 1294f0ee2e46SJames Carter if (!dentry) { 1295f0ee2e46SJames Carter ret = -ENOMEM; 1296f0ee2e46SJames Carter goto out; 1297f0ee2e46SJames Carter } 1298f0ee2e46SJames Carter 1299f0ee2e46SJames Carter inode = sel_make_inode(dir->d_sb, S_IFREG|S_IRUGO); 1300f0ee2e46SJames Carter if (!inode) { 1301f0ee2e46SJames Carter ret = -ENOMEM; 1302f0ee2e46SJames Carter goto out; 1303f0ee2e46SJames Carter } 1304f0ee2e46SJames Carter inode->i_fop = &sel_initcon_ops; 1305f0ee2e46SJames Carter inode->i_ino = i|SEL_INITCON_INO_OFFSET; 1306f0ee2e46SJames Carter d_add(dentry, inode); 1307f0ee2e46SJames Carter } 1308f0ee2e46SJames Carter out: 1309f0ee2e46SJames Carter return ret; 1310f0ee2e46SJames Carter } 1311f0ee2e46SJames Carter 1312e47c8fc5SChristopher J. PeBenito static inline unsigned int sel_div(unsigned long a, unsigned long b) 1313e47c8fc5SChristopher J. PeBenito { 1314e47c8fc5SChristopher J. PeBenito return a / b - (a % b < 0); 1315e47c8fc5SChristopher J. PeBenito } 1316e47c8fc5SChristopher J. PeBenito 1317e47c8fc5SChristopher J. PeBenito static inline unsigned long sel_class_to_ino(u16 class) 1318e47c8fc5SChristopher J. PeBenito { 1319e47c8fc5SChristopher J. PeBenito return (class * (SEL_VEC_MAX + 1)) | SEL_CLASS_INO_OFFSET; 1320e47c8fc5SChristopher J. PeBenito } 1321e47c8fc5SChristopher J. PeBenito 1322e47c8fc5SChristopher J. PeBenito static inline u16 sel_ino_to_class(unsigned long ino) 1323e47c8fc5SChristopher J. PeBenito { 1324e47c8fc5SChristopher J. PeBenito return sel_div(ino & SEL_INO_MASK, SEL_VEC_MAX + 1); 1325e47c8fc5SChristopher J. PeBenito } 1326e47c8fc5SChristopher J. PeBenito 1327e47c8fc5SChristopher J. PeBenito static inline unsigned long sel_perm_to_ino(u16 class, u32 perm) 1328e47c8fc5SChristopher J. PeBenito { 1329e47c8fc5SChristopher J. PeBenito return (class * (SEL_VEC_MAX + 1) + perm) | SEL_CLASS_INO_OFFSET; 1330e47c8fc5SChristopher J. PeBenito } 1331e47c8fc5SChristopher J. PeBenito 1332e47c8fc5SChristopher J. PeBenito static inline u32 sel_ino_to_perm(unsigned long ino) 1333e47c8fc5SChristopher J. PeBenito { 1334e47c8fc5SChristopher J. PeBenito return (ino & SEL_INO_MASK) % (SEL_VEC_MAX + 1); 1335e47c8fc5SChristopher J. PeBenito } 1336e47c8fc5SChristopher J. PeBenito 1337e47c8fc5SChristopher J. PeBenito static ssize_t sel_read_class(struct file * file, char __user *buf, 1338e47c8fc5SChristopher J. PeBenito size_t count, loff_t *ppos) 1339e47c8fc5SChristopher J. PeBenito { 1340e47c8fc5SChristopher J. PeBenito ssize_t rc, len; 1341e47c8fc5SChristopher J. PeBenito char *page; 1342e47c8fc5SChristopher J. PeBenito unsigned long ino = file->f_path.dentry->d_inode->i_ino; 1343e47c8fc5SChristopher J. PeBenito 1344e47c8fc5SChristopher J. PeBenito page = (char *)__get_free_page(GFP_KERNEL); 1345e47c8fc5SChristopher J. PeBenito if (!page) { 1346e47c8fc5SChristopher J. PeBenito rc = -ENOMEM; 1347e47c8fc5SChristopher J. PeBenito goto out; 1348e47c8fc5SChristopher J. PeBenito } 1349e47c8fc5SChristopher J. PeBenito 1350e47c8fc5SChristopher J. PeBenito len = snprintf(page, PAGE_SIZE, "%d", sel_ino_to_class(ino)); 1351e47c8fc5SChristopher J. PeBenito rc = simple_read_from_buffer(buf, count, ppos, page, len); 1352e47c8fc5SChristopher J. PeBenito free_page((unsigned long)page); 1353e47c8fc5SChristopher J. PeBenito out: 1354e47c8fc5SChristopher J. PeBenito return rc; 1355e47c8fc5SChristopher J. PeBenito } 1356e47c8fc5SChristopher J. PeBenito 1357e47c8fc5SChristopher J. PeBenito static const struct file_operations sel_class_ops = { 1358e47c8fc5SChristopher J. PeBenito .read = sel_read_class, 1359e47c8fc5SChristopher J. PeBenito }; 1360e47c8fc5SChristopher J. PeBenito 1361e47c8fc5SChristopher J. PeBenito static ssize_t sel_read_perm(struct file * file, char __user *buf, 1362e47c8fc5SChristopher J. PeBenito size_t count, loff_t *ppos) 1363e47c8fc5SChristopher J. PeBenito { 1364e47c8fc5SChristopher J. PeBenito ssize_t rc, len; 1365e47c8fc5SChristopher J. PeBenito char *page; 1366e47c8fc5SChristopher J. PeBenito unsigned long ino = file->f_path.dentry->d_inode->i_ino; 1367e47c8fc5SChristopher J. PeBenito 1368e47c8fc5SChristopher J. PeBenito page = (char *)__get_free_page(GFP_KERNEL); 1369e47c8fc5SChristopher J. PeBenito if (!page) { 1370e47c8fc5SChristopher J. PeBenito rc = -ENOMEM; 1371e47c8fc5SChristopher J. PeBenito goto out; 1372e47c8fc5SChristopher J. PeBenito } 1373e47c8fc5SChristopher J. PeBenito 1374e47c8fc5SChristopher J. PeBenito len = snprintf(page, PAGE_SIZE,"%d", sel_ino_to_perm(ino)); 1375e47c8fc5SChristopher J. PeBenito rc = simple_read_from_buffer(buf, count, ppos, page, len); 1376e47c8fc5SChristopher J. PeBenito free_page((unsigned long)page); 1377e47c8fc5SChristopher J. PeBenito out: 1378e47c8fc5SChristopher J. PeBenito return rc; 1379e47c8fc5SChristopher J. PeBenito } 1380e47c8fc5SChristopher J. PeBenito 1381e47c8fc5SChristopher J. PeBenito static const struct file_operations sel_perm_ops = { 1382e47c8fc5SChristopher J. PeBenito .read = sel_read_perm, 1383e47c8fc5SChristopher J. PeBenito }; 1384e47c8fc5SChristopher J. PeBenito 1385e47c8fc5SChristopher J. PeBenito static int sel_make_perm_files(char *objclass, int classvalue, 1386e47c8fc5SChristopher J. PeBenito struct dentry *dir) 1387e47c8fc5SChristopher J. PeBenito { 1388e47c8fc5SChristopher J. PeBenito int i, rc = 0, nperms; 1389e47c8fc5SChristopher J. PeBenito char **perms; 1390e47c8fc5SChristopher J. PeBenito 1391e47c8fc5SChristopher J. PeBenito rc = security_get_permissions(objclass, &perms, &nperms); 1392e47c8fc5SChristopher J. PeBenito if (rc) 1393e47c8fc5SChristopher J. PeBenito goto out; 1394e47c8fc5SChristopher J. PeBenito 1395e47c8fc5SChristopher J. PeBenito for (i = 0; i < nperms; i++) { 1396e47c8fc5SChristopher J. PeBenito struct inode *inode; 1397e47c8fc5SChristopher J. PeBenito struct dentry *dentry; 1398e47c8fc5SChristopher J. PeBenito 1399e47c8fc5SChristopher J. PeBenito dentry = d_alloc_name(dir, perms[i]); 1400e47c8fc5SChristopher J. PeBenito if (!dentry) { 1401e47c8fc5SChristopher J. PeBenito rc = -ENOMEM; 1402e47c8fc5SChristopher J. PeBenito goto out1; 1403e47c8fc5SChristopher J. PeBenito } 1404e47c8fc5SChristopher J. PeBenito 1405e47c8fc5SChristopher J. PeBenito inode = sel_make_inode(dir->d_sb, S_IFREG|S_IRUGO); 1406e47c8fc5SChristopher J. PeBenito if (!inode) { 1407e47c8fc5SChristopher J. PeBenito rc = -ENOMEM; 1408e47c8fc5SChristopher J. PeBenito goto out1; 1409e47c8fc5SChristopher J. PeBenito } 1410e47c8fc5SChristopher J. PeBenito inode->i_fop = &sel_perm_ops; 1411e47c8fc5SChristopher J. PeBenito /* i+1 since perm values are 1-indexed */ 1412e47c8fc5SChristopher J. PeBenito inode->i_ino = sel_perm_to_ino(classvalue, i+1); 1413e47c8fc5SChristopher J. PeBenito d_add(dentry, inode); 1414e47c8fc5SChristopher J. PeBenito } 1415e47c8fc5SChristopher J. PeBenito 1416e47c8fc5SChristopher J. PeBenito out1: 1417e47c8fc5SChristopher J. PeBenito for (i = 0; i < nperms; i++) 1418e47c8fc5SChristopher J. PeBenito kfree(perms[i]); 1419e47c8fc5SChristopher J. PeBenito kfree(perms); 1420e47c8fc5SChristopher J. PeBenito out: 1421e47c8fc5SChristopher J. PeBenito return rc; 1422e47c8fc5SChristopher J. PeBenito } 1423e47c8fc5SChristopher J. PeBenito 1424e47c8fc5SChristopher J. PeBenito static int sel_make_class_dir_entries(char *classname, int index, 1425e47c8fc5SChristopher J. PeBenito struct dentry *dir) 1426e47c8fc5SChristopher J. PeBenito { 1427e47c8fc5SChristopher J. PeBenito struct dentry *dentry = NULL; 1428e47c8fc5SChristopher J. PeBenito struct inode *inode = NULL; 1429e47c8fc5SChristopher J. PeBenito int rc; 1430e47c8fc5SChristopher J. PeBenito 1431e47c8fc5SChristopher J. PeBenito dentry = d_alloc_name(dir, "index"); 1432e47c8fc5SChristopher J. PeBenito if (!dentry) { 1433e47c8fc5SChristopher J. PeBenito rc = -ENOMEM; 1434e47c8fc5SChristopher J. PeBenito goto out; 1435e47c8fc5SChristopher J. PeBenito } 1436e47c8fc5SChristopher J. PeBenito 1437e47c8fc5SChristopher J. PeBenito inode = sel_make_inode(dir->d_sb, S_IFREG|S_IRUGO); 1438e47c8fc5SChristopher J. PeBenito if (!inode) { 1439e47c8fc5SChristopher J. PeBenito rc = -ENOMEM; 1440e47c8fc5SChristopher J. PeBenito goto out; 1441e47c8fc5SChristopher J. PeBenito } 1442e47c8fc5SChristopher J. PeBenito 1443e47c8fc5SChristopher J. PeBenito inode->i_fop = &sel_class_ops; 1444e47c8fc5SChristopher J. PeBenito inode->i_ino = sel_class_to_ino(index); 1445e47c8fc5SChristopher J. PeBenito d_add(dentry, inode); 1446e47c8fc5SChristopher J. PeBenito 1447e47c8fc5SChristopher J. PeBenito dentry = d_alloc_name(dir, "perms"); 1448e47c8fc5SChristopher J. PeBenito if (!dentry) { 1449e47c8fc5SChristopher J. PeBenito rc = -ENOMEM; 1450e47c8fc5SChristopher J. PeBenito goto out; 1451e47c8fc5SChristopher J. PeBenito } 1452e47c8fc5SChristopher J. PeBenito 1453e47c8fc5SChristopher J. PeBenito rc = sel_make_dir(dir->d_inode, dentry, &last_class_ino); 1454e47c8fc5SChristopher J. PeBenito if (rc) 1455e47c8fc5SChristopher J. PeBenito goto out; 1456e47c8fc5SChristopher J. PeBenito 1457e47c8fc5SChristopher J. PeBenito rc = sel_make_perm_files(classname, index, dentry); 1458e47c8fc5SChristopher J. PeBenito 1459e47c8fc5SChristopher J. PeBenito out: 1460e47c8fc5SChristopher J. PeBenito return rc; 1461e47c8fc5SChristopher J. PeBenito } 1462e47c8fc5SChristopher J. PeBenito 1463e47c8fc5SChristopher J. PeBenito static void sel_remove_classes(void) 1464e47c8fc5SChristopher J. PeBenito { 1465e47c8fc5SChristopher J. PeBenito struct list_head *class_node; 1466e47c8fc5SChristopher J. PeBenito 1467e47c8fc5SChristopher J. PeBenito list_for_each(class_node, &class_dir->d_subdirs) { 1468e47c8fc5SChristopher J. PeBenito struct dentry *class_subdir = list_entry(class_node, 1469e47c8fc5SChristopher J. PeBenito struct dentry, d_u.d_child); 1470e47c8fc5SChristopher J. PeBenito struct list_head *class_subdir_node; 1471e47c8fc5SChristopher J. PeBenito 1472e47c8fc5SChristopher J. PeBenito list_for_each(class_subdir_node, &class_subdir->d_subdirs) { 1473e47c8fc5SChristopher J. PeBenito struct dentry *d = list_entry(class_subdir_node, 1474e47c8fc5SChristopher J. PeBenito struct dentry, d_u.d_child); 1475e47c8fc5SChristopher J. PeBenito 1476e47c8fc5SChristopher J. PeBenito if (d->d_inode) 1477e47c8fc5SChristopher J. PeBenito if (d->d_inode->i_mode & S_IFDIR) 1478e47c8fc5SChristopher J. PeBenito sel_remove_entries(d); 1479e47c8fc5SChristopher J. PeBenito } 1480e47c8fc5SChristopher J. PeBenito 1481e47c8fc5SChristopher J. PeBenito sel_remove_entries(class_subdir); 1482e47c8fc5SChristopher J. PeBenito } 1483e47c8fc5SChristopher J. PeBenito 1484e47c8fc5SChristopher J. PeBenito sel_remove_entries(class_dir); 1485e47c8fc5SChristopher J. PeBenito } 1486e47c8fc5SChristopher J. PeBenito 1487e47c8fc5SChristopher J. PeBenito static int sel_make_classes(void) 1488e47c8fc5SChristopher J. PeBenito { 1489e47c8fc5SChristopher J. PeBenito int rc = 0, nclasses, i; 1490e47c8fc5SChristopher J. PeBenito char **classes; 1491e47c8fc5SChristopher J. PeBenito 1492e47c8fc5SChristopher J. PeBenito /* delete any existing entries */ 1493e47c8fc5SChristopher J. PeBenito sel_remove_classes(); 1494e47c8fc5SChristopher J. PeBenito 1495e47c8fc5SChristopher J. PeBenito rc = security_get_classes(&classes, &nclasses); 1496e47c8fc5SChristopher J. PeBenito if (rc < 0) 1497e47c8fc5SChristopher J. PeBenito goto out; 1498e47c8fc5SChristopher J. PeBenito 1499e47c8fc5SChristopher J. PeBenito /* +2 since classes are 1-indexed */ 1500e47c8fc5SChristopher J. PeBenito last_class_ino = sel_class_to_ino(nclasses+2); 1501e47c8fc5SChristopher J. PeBenito 1502e47c8fc5SChristopher J. PeBenito for (i = 0; i < nclasses; i++) { 1503e47c8fc5SChristopher J. PeBenito struct dentry *class_name_dir; 1504e47c8fc5SChristopher J. PeBenito 1505e47c8fc5SChristopher J. PeBenito class_name_dir = d_alloc_name(class_dir, classes[i]); 1506e47c8fc5SChristopher J. PeBenito if (!class_name_dir) { 1507e47c8fc5SChristopher J. PeBenito rc = -ENOMEM; 1508e47c8fc5SChristopher J. PeBenito goto out1; 1509e47c8fc5SChristopher J. PeBenito } 1510e47c8fc5SChristopher J. PeBenito 1511e47c8fc5SChristopher J. PeBenito rc = sel_make_dir(class_dir->d_inode, class_name_dir, 1512e47c8fc5SChristopher J. PeBenito &last_class_ino); 1513e47c8fc5SChristopher J. PeBenito if (rc) 1514e47c8fc5SChristopher J. PeBenito goto out1; 1515e47c8fc5SChristopher J. PeBenito 1516e47c8fc5SChristopher J. PeBenito /* i+1 since class values are 1-indexed */ 1517e47c8fc5SChristopher J. PeBenito rc = sel_make_class_dir_entries(classes[i], i+1, 1518e47c8fc5SChristopher J. PeBenito class_name_dir); 1519e47c8fc5SChristopher J. PeBenito if (rc) 1520e47c8fc5SChristopher J. PeBenito goto out1; 1521e47c8fc5SChristopher J. PeBenito } 1522e47c8fc5SChristopher J. PeBenito 1523e47c8fc5SChristopher J. PeBenito out1: 1524e47c8fc5SChristopher J. PeBenito for (i = 0; i < nclasses; i++) 1525e47c8fc5SChristopher J. PeBenito kfree(classes[i]); 1526e47c8fc5SChristopher J. PeBenito kfree(classes); 1527e47c8fc5SChristopher J. PeBenito out: 1528e47c8fc5SChristopher J. PeBenito return rc; 1529e47c8fc5SChristopher J. PeBenito } 1530e47c8fc5SChristopher J. PeBenito 15310dd4ae51SChristopher J. PeBenito static int sel_make_dir(struct inode *dir, struct dentry *dentry, 15320dd4ae51SChristopher J. PeBenito unsigned long *ino) 15331da177e4SLinus Torvalds { 15341da177e4SLinus Torvalds int ret = 0; 15351da177e4SLinus Torvalds struct inode *inode; 15361da177e4SLinus Torvalds 1537edb20fb5SJames Morris inode = sel_make_inode(dir->i_sb, S_IFDIR | S_IRUGO | S_IXUGO); 15381da177e4SLinus Torvalds if (!inode) { 15391da177e4SLinus Torvalds ret = -ENOMEM; 15401da177e4SLinus Torvalds goto out; 15411da177e4SLinus Torvalds } 15421da177e4SLinus Torvalds inode->i_op = &simple_dir_inode_operations; 15431da177e4SLinus Torvalds inode->i_fop = &simple_dir_operations; 15440dd4ae51SChristopher J. PeBenito inode->i_ino = ++(*ino); 154540e906f8SJames Morris /* directory inodes start off with i_nlink == 2 (for "." entry) */ 1546d8c76e6fSDave Hansen inc_nlink(inode); 15471da177e4SLinus Torvalds d_add(dentry, inode); 1548edb20fb5SJames Morris /* bump link count on parent directory, too */ 1549d8c76e6fSDave Hansen inc_nlink(dir); 15501da177e4SLinus Torvalds out: 15511da177e4SLinus Torvalds return ret; 15521da177e4SLinus Torvalds } 15531da177e4SLinus Torvalds 15541da177e4SLinus Torvalds static int sel_fill_super(struct super_block * sb, void * data, int silent) 15551da177e4SLinus Torvalds { 15561da177e4SLinus Torvalds int ret; 15571da177e4SLinus Torvalds struct dentry *dentry; 1558edb20fb5SJames Morris struct inode *inode, *root_inode; 15591da177e4SLinus Torvalds struct inode_security_struct *isec; 15601da177e4SLinus Torvalds 15611da177e4SLinus Torvalds static struct tree_descr selinux_files[] = { 15621da177e4SLinus Torvalds [SEL_LOAD] = {"load", &sel_load_ops, S_IRUSR|S_IWUSR}, 15631da177e4SLinus Torvalds [SEL_ENFORCE] = {"enforce", &sel_enforce_ops, S_IRUGO|S_IWUSR}, 1564ce9982d0SStephen Smalley [SEL_CONTEXT] = {"context", &transaction_ops, S_IRUGO|S_IWUGO}, 15651da177e4SLinus Torvalds [SEL_ACCESS] = {"access", &transaction_ops, S_IRUGO|S_IWUGO}, 15661da177e4SLinus Torvalds [SEL_CREATE] = {"create", &transaction_ops, S_IRUGO|S_IWUGO}, 15671da177e4SLinus Torvalds [SEL_RELABEL] = {"relabel", &transaction_ops, S_IRUGO|S_IWUGO}, 15681da177e4SLinus Torvalds [SEL_USER] = {"user", &transaction_ops, S_IRUGO|S_IWUGO}, 15691da177e4SLinus Torvalds [SEL_POLICYVERS] = {"policyvers", &sel_policyvers_ops, S_IRUGO}, 15701da177e4SLinus Torvalds [SEL_COMMIT_BOOLS] = {"commit_pending_bools", &sel_commit_bools_ops, S_IWUSR}, 15711da177e4SLinus Torvalds [SEL_MLS] = {"mls", &sel_mls_ops, S_IRUGO}, 15721da177e4SLinus Torvalds [SEL_DISABLE] = {"disable", &sel_disable_ops, S_IWUSR}, 15731da177e4SLinus Torvalds [SEL_MEMBER] = {"member", &transaction_ops, S_IRUGO|S_IWUGO}, 15741da177e4SLinus Torvalds [SEL_CHECKREQPROT] = {"checkreqprot", &sel_checkreqprot_ops, S_IRUGO|S_IWUSR}, 15754e5ab4cbSJames Morris [SEL_COMPAT_NET] = {"compat_net", &sel_compat_net_ops, S_IRUGO|S_IWUSR}, 15763f12070eSEric Paris [SEL_REJECT_UNKNOWN] = {"reject_unknown", &sel_handle_unknown_ops, S_IRUGO}, 15773f12070eSEric Paris [SEL_DENY_UNKNOWN] = {"deny_unknown", &sel_handle_unknown_ops, S_IRUGO}, 15781da177e4SLinus Torvalds /* last one */ {""} 15791da177e4SLinus Torvalds }; 15801da177e4SLinus Torvalds ret = simple_fill_super(sb, SELINUX_MAGIC, selinux_files); 15811da177e4SLinus Torvalds if (ret) 1582161ce45aSJames Morris goto err; 15831da177e4SLinus Torvalds 1584edb20fb5SJames Morris root_inode = sb->s_root->d_inode; 1585edb20fb5SJames Morris 15861da177e4SLinus Torvalds dentry = d_alloc_name(sb->s_root, BOOL_DIR_NAME); 1587161ce45aSJames Morris if (!dentry) { 1588161ce45aSJames Morris ret = -ENOMEM; 1589161ce45aSJames Morris goto err; 1590161ce45aSJames Morris } 15911da177e4SLinus Torvalds 15920dd4ae51SChristopher J. PeBenito ret = sel_make_dir(root_inode, dentry, &sel_last_ino); 1593cde174a8SJames Morris if (ret) 1594161ce45aSJames Morris goto err; 1595cde174a8SJames Morris 15961da177e4SLinus Torvalds bool_dir = dentry; 15971da177e4SLinus Torvalds 15981da177e4SLinus Torvalds dentry = d_alloc_name(sb->s_root, NULL_FILE_NAME); 1599161ce45aSJames Morris if (!dentry) { 1600161ce45aSJames Morris ret = -ENOMEM; 1601161ce45aSJames Morris goto err; 1602161ce45aSJames Morris } 16031da177e4SLinus Torvalds 16041da177e4SLinus Torvalds inode = sel_make_inode(sb, S_IFCHR | S_IRUGO | S_IWUGO); 1605161ce45aSJames Morris if (!inode) { 1606161ce45aSJames Morris ret = -ENOMEM; 1607161ce45aSJames Morris goto err; 1608161ce45aSJames Morris } 16096174eafcSJames Carter inode->i_ino = ++sel_last_ino; 16101da177e4SLinus Torvalds isec = (struct inode_security_struct*)inode->i_security; 16111da177e4SLinus Torvalds isec->sid = SECINITSID_DEVNULL; 16121da177e4SLinus Torvalds isec->sclass = SECCLASS_CHR_FILE; 16131da177e4SLinus Torvalds isec->initialized = 1; 16141da177e4SLinus Torvalds 16151da177e4SLinus Torvalds init_special_inode(inode, S_IFCHR | S_IRUGO | S_IWUGO, MKDEV(MEM_MAJOR, 3)); 16161da177e4SLinus Torvalds d_add(dentry, inode); 16171da177e4SLinus Torvalds selinux_null = dentry; 16181da177e4SLinus Torvalds 16191da177e4SLinus Torvalds dentry = d_alloc_name(sb->s_root, "avc"); 1620161ce45aSJames Morris if (!dentry) { 1621161ce45aSJames Morris ret = -ENOMEM; 1622161ce45aSJames Morris goto err; 1623161ce45aSJames Morris } 16241da177e4SLinus Torvalds 16250dd4ae51SChristopher J. PeBenito ret = sel_make_dir(root_inode, dentry, &sel_last_ino); 16261da177e4SLinus Torvalds if (ret) 1627161ce45aSJames Morris goto err; 16281da177e4SLinus Torvalds 16291da177e4SLinus Torvalds ret = sel_make_avc_files(dentry); 16301da177e4SLinus Torvalds if (ret) 1631161ce45aSJames Morris goto err; 1632f0ee2e46SJames Carter 1633f0ee2e46SJames Carter dentry = d_alloc_name(sb->s_root, "initial_contexts"); 1634f0ee2e46SJames Carter if (!dentry) { 1635f0ee2e46SJames Carter ret = -ENOMEM; 1636f0ee2e46SJames Carter goto err; 1637f0ee2e46SJames Carter } 1638f0ee2e46SJames Carter 16390dd4ae51SChristopher J. PeBenito ret = sel_make_dir(root_inode, dentry, &sel_last_ino); 1640f0ee2e46SJames Carter if (ret) 1641f0ee2e46SJames Carter goto err; 1642f0ee2e46SJames Carter 1643f0ee2e46SJames Carter ret = sel_make_initcon_files(dentry); 1644f0ee2e46SJames Carter if (ret) 1645f0ee2e46SJames Carter goto err; 1646f0ee2e46SJames Carter 1647e47c8fc5SChristopher J. PeBenito dentry = d_alloc_name(sb->s_root, "class"); 1648e47c8fc5SChristopher J. PeBenito if (!dentry) { 1649e47c8fc5SChristopher J. PeBenito ret = -ENOMEM; 1650e47c8fc5SChristopher J. PeBenito goto err; 1651e47c8fc5SChristopher J. PeBenito } 1652e47c8fc5SChristopher J. PeBenito 1653e47c8fc5SChristopher J. PeBenito ret = sel_make_dir(root_inode, dentry, &sel_last_ino); 1654e47c8fc5SChristopher J. PeBenito if (ret) 1655e47c8fc5SChristopher J. PeBenito goto err; 1656e47c8fc5SChristopher J. PeBenito 1657e47c8fc5SChristopher J. PeBenito class_dir = dentry; 1658e47c8fc5SChristopher J. PeBenito 16591da177e4SLinus Torvalds out: 1660161ce45aSJames Morris return ret; 1661161ce45aSJames Morris err: 16621da177e4SLinus Torvalds printk(KERN_ERR "%s: failed while creating inodes\n", __FUNCTION__); 1663161ce45aSJames Morris goto out; 16641da177e4SLinus Torvalds } 16651da177e4SLinus Torvalds 1666454e2398SDavid Howells static int sel_get_sb(struct file_system_type *fs_type, 1667454e2398SDavid Howells int flags, const char *dev_name, void *data, 1668454e2398SDavid Howells struct vfsmount *mnt) 16691da177e4SLinus Torvalds { 1670454e2398SDavid Howells return get_sb_single(fs_type, flags, data, sel_fill_super, mnt); 16711da177e4SLinus Torvalds } 16721da177e4SLinus Torvalds 16731da177e4SLinus Torvalds static struct file_system_type sel_fs_type = { 16741da177e4SLinus Torvalds .name = "selinuxfs", 16751da177e4SLinus Torvalds .get_sb = sel_get_sb, 16761da177e4SLinus Torvalds .kill_sb = kill_litter_super, 16771da177e4SLinus Torvalds }; 16781da177e4SLinus Torvalds 16791da177e4SLinus Torvalds struct vfsmount *selinuxfs_mount; 16801da177e4SLinus Torvalds 16811da177e4SLinus Torvalds static int __init init_sel_fs(void) 16821da177e4SLinus Torvalds { 16831da177e4SLinus Torvalds int err; 16841da177e4SLinus Torvalds 16851da177e4SLinus Torvalds if (!selinux_enabled) 16861da177e4SLinus Torvalds return 0; 16871da177e4SLinus Torvalds err = register_filesystem(&sel_fs_type); 16881da177e4SLinus Torvalds if (!err) { 16891da177e4SLinus Torvalds selinuxfs_mount = kern_mount(&sel_fs_type); 16901da177e4SLinus Torvalds if (IS_ERR(selinuxfs_mount)) { 16911da177e4SLinus Torvalds printk(KERN_ERR "selinuxfs: could not mount!\n"); 16921da177e4SLinus Torvalds err = PTR_ERR(selinuxfs_mount); 16931da177e4SLinus Torvalds selinuxfs_mount = NULL; 16941da177e4SLinus Torvalds } 16951da177e4SLinus Torvalds } 16961da177e4SLinus Torvalds return err; 16971da177e4SLinus Torvalds } 16981da177e4SLinus Torvalds 16991da177e4SLinus Torvalds __initcall(init_sel_fs); 17001da177e4SLinus Torvalds 17011da177e4SLinus Torvalds #ifdef CONFIG_SECURITY_SELINUX_DISABLE 17021da177e4SLinus Torvalds void exit_sel_fs(void) 17031da177e4SLinus Torvalds { 17041da177e4SLinus Torvalds unregister_filesystem(&sel_fs_type); 17051da177e4SLinus Torvalds } 17061da177e4SLinus Torvalds #endif 1707