11da177e4SLinus Torvalds /* Updated: Karl MacMillan <kmacmillan@tresys.com> 21da177e4SLinus Torvalds * 31da177e4SLinus Torvalds * Added conditional policy language extensions 41da177e4SLinus Torvalds * 53bb56b25SPaul Moore * Updated: Hewlett-Packard <paul.moore@hp.com> 63bb56b25SPaul Moore * 73bb56b25SPaul Moore * Added support for the policy capability bitmap 83bb56b25SPaul Moore * 93bb56b25SPaul Moore * Copyright (C) 2007 Hewlett-Packard Development Company, L.P. 101da177e4SLinus Torvalds * Copyright (C) 2003 - 2004 Tresys Technology, LLC 111da177e4SLinus Torvalds * Copyright (C) 2004 Red Hat, Inc., James Morris <jmorris@redhat.com> 121da177e4SLinus Torvalds * This program is free software; you can redistribute it and/or modify 131da177e4SLinus Torvalds * it under the terms of the GNU General Public License as published by 141da177e4SLinus Torvalds * the Free Software Foundation, version 2. 151da177e4SLinus Torvalds */ 161da177e4SLinus Torvalds 171da177e4SLinus Torvalds #include <linux/kernel.h> 181da177e4SLinus Torvalds #include <linux/pagemap.h> 191da177e4SLinus Torvalds #include <linux/slab.h> 201da177e4SLinus Torvalds #include <linux/vmalloc.h> 211da177e4SLinus Torvalds #include <linux/fs.h> 22bb003079SIngo Molnar #include <linux/mutex.h> 231da177e4SLinus Torvalds #include <linux/init.h> 241da177e4SLinus Torvalds #include <linux/string.h> 251da177e4SLinus Torvalds #include <linux/security.h> 261da177e4SLinus Torvalds #include <linux/major.h> 271da177e4SLinus Torvalds #include <linux/seq_file.h> 281da177e4SLinus Torvalds #include <linux/percpu.h> 29af601e46SSteve Grubb #include <linux/audit.h> 30f5269710SEric Paris #include <linux/uaccess.h> 311da177e4SLinus Torvalds 321da177e4SLinus Torvalds /* selinuxfs pseudo filesystem for exporting the security policy API. 331da177e4SLinus Torvalds Based on the proc code and the fs/nfsd/nfsctl.c code. */ 341da177e4SLinus Torvalds 351da177e4SLinus Torvalds #include "flask.h" 361da177e4SLinus Torvalds #include "avc.h" 371da177e4SLinus Torvalds #include "avc_ss.h" 381da177e4SLinus Torvalds #include "security.h" 391da177e4SLinus Torvalds #include "objsec.h" 401da177e4SLinus Torvalds #include "conditional.h" 411da177e4SLinus Torvalds 423bb56b25SPaul Moore /* Policy capability filenames */ 433bb56b25SPaul Moore static char *policycap_names[] = { 44b0c636b9SEric Paris "network_peer_controls", 45b0c636b9SEric Paris "open_perms" 463bb56b25SPaul Moore }; 473bb56b25SPaul Moore 481da177e4SLinus Torvalds unsigned int selinux_checkreqprot = CONFIG_SECURITY_SELINUX_CHECKREQPROT_VALUE; 491da177e4SLinus Torvalds 501da177e4SLinus Torvalds static int __init checkreqprot_setup(char *str) 511da177e4SLinus Torvalds { 52f5269710SEric Paris unsigned long checkreqprot; 53f5269710SEric Paris if (!strict_strtoul(str, 0, &checkreqprot)) 54f5269710SEric Paris selinux_checkreqprot = checkreqprot ? 1 : 0; 551da177e4SLinus Torvalds return 1; 561da177e4SLinus Torvalds } 571da177e4SLinus Torvalds __setup("checkreqprot=", checkreqprot_setup); 581da177e4SLinus Torvalds 59bb003079SIngo Molnar static DEFINE_MUTEX(sel_mutex); 601da177e4SLinus Torvalds 611da177e4SLinus Torvalds /* global data for booleans */ 621872981bSEric Paris static struct dentry *bool_dir; 631872981bSEric Paris static int bool_num; 64d313f948SStephen Smalley static char **bool_pending_names; 651872981bSEric Paris static int *bool_pending_values; 661da177e4SLinus Torvalds 67e47c8fc5SChristopher J. PeBenito /* global data for classes */ 681872981bSEric Paris static struct dentry *class_dir; 69e47c8fc5SChristopher J. PeBenito static unsigned long last_class_ino; 70e47c8fc5SChristopher J. PeBenito 713bb56b25SPaul Moore /* global data for policy capabilities */ 721872981bSEric Paris static struct dentry *policycap_dir; 733bb56b25SPaul Moore 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 { 80c69e8d9cSDavid Howells const struct task_security_struct *tsec; 81c69e8d9cSDavid Howells u32 sid = 0; 821da177e4SLinus Torvalds 83c69e8d9cSDavid Howells rcu_read_lock(); 84c69e8d9cSDavid Howells tsec = __task_cred(tsk)->security; 85c69e8d9cSDavid Howells if (tsec) 86c69e8d9cSDavid Howells sid = tsec->sid; 87c69e8d9cSDavid Howells rcu_read_unlock(); 881da177e4SLinus Torvalds if (!tsec) 891da177e4SLinus Torvalds return -EACCES; 901da177e4SLinus Torvalds 91c69e8d9cSDavid Howells return avc_has_perm(sid, SECINITSID_SECURITY, 921da177e4SLinus Torvalds SECCLASS_SECURITY, perms, NULL); 931da177e4SLinus Torvalds } 941da177e4SLinus Torvalds 951da177e4SLinus Torvalds enum sel_inos { 961da177e4SLinus Torvalds SEL_ROOT_INO = 2, 971da177e4SLinus Torvalds SEL_LOAD, /* load policy */ 981da177e4SLinus Torvalds SEL_ENFORCE, /* get or set enforcing status */ 991da177e4SLinus Torvalds SEL_CONTEXT, /* validate context */ 1001da177e4SLinus Torvalds SEL_ACCESS, /* compute access decision */ 1011da177e4SLinus Torvalds SEL_CREATE, /* compute create labeling decision */ 1021da177e4SLinus Torvalds SEL_RELABEL, /* compute relabeling decision */ 1031da177e4SLinus Torvalds SEL_USER, /* compute reachable user contexts */ 1041da177e4SLinus Torvalds SEL_POLICYVERS, /* return policy version for this kernel */ 1051da177e4SLinus Torvalds SEL_COMMIT_BOOLS, /* commit new boolean values */ 1061da177e4SLinus Torvalds SEL_MLS, /* return if MLS policy is enabled */ 1071da177e4SLinus Torvalds SEL_DISABLE, /* disable SELinux until next reboot */ 1081da177e4SLinus Torvalds SEL_MEMBER, /* compute polyinstantiation membership decision */ 1091da177e4SLinus Torvalds SEL_CHECKREQPROT, /* check requested protection, not kernel-applied one */ 1104e5ab4cbSJames Morris SEL_COMPAT_NET, /* whether to use old compat network packet controls */ 1113f12070eSEric Paris SEL_REJECT_UNKNOWN, /* export unknown reject handling to userspace */ 1123f12070eSEric Paris SEL_DENY_UNKNOWN, /* export unknown deny handling to userspace */ 1136174eafcSJames Carter SEL_INO_NEXT, /* The next inode number to use */ 1141da177e4SLinus Torvalds }; 1151da177e4SLinus Torvalds 1166174eafcSJames Carter static unsigned long sel_last_ino = SEL_INO_NEXT - 1; 1176174eafcSJames Carter 118f0ee2e46SJames Carter #define SEL_INITCON_INO_OFFSET 0x01000000 119bce34bc0SJames Carter #define SEL_BOOL_INO_OFFSET 0x02000000 120e47c8fc5SChristopher J. PeBenito #define SEL_CLASS_INO_OFFSET 0x04000000 1213bb56b25SPaul Moore #define SEL_POLICYCAP_INO_OFFSET 0x08000000 122f0ee2e46SJames Carter #define SEL_INO_MASK 0x00ffffff 123f0ee2e46SJames Carter 1241da177e4SLinus Torvalds #define TMPBUFLEN 12 1251da177e4SLinus Torvalds static ssize_t sel_read_enforce(struct file *filp, char __user *buf, 1261da177e4SLinus Torvalds size_t count, loff_t *ppos) 1271da177e4SLinus Torvalds { 1281da177e4SLinus Torvalds char tmpbuf[TMPBUFLEN]; 1291da177e4SLinus Torvalds ssize_t length; 1301da177e4SLinus Torvalds 1311da177e4SLinus Torvalds length = scnprintf(tmpbuf, TMPBUFLEN, "%d", selinux_enforcing); 1321da177e4SLinus Torvalds return simple_read_from_buffer(buf, count, ppos, tmpbuf, length); 1331da177e4SLinus Torvalds } 1341da177e4SLinus Torvalds 1351da177e4SLinus Torvalds #ifdef CONFIG_SECURITY_SELINUX_DEVELOP 1361da177e4SLinus Torvalds static ssize_t sel_write_enforce(struct file *file, const char __user *buf, 1371da177e4SLinus Torvalds size_t count, loff_t *ppos) 1381da177e4SLinus Torvalds 1391da177e4SLinus Torvalds { 1401da177e4SLinus Torvalds char *page; 1411da177e4SLinus Torvalds ssize_t length; 1421da177e4SLinus Torvalds int new_value; 1431da177e4SLinus Torvalds 144bfd51626SDavi Arnaut if (count >= PAGE_SIZE) 1451da177e4SLinus Torvalds return -ENOMEM; 1461da177e4SLinus Torvalds if (*ppos != 0) { 1471da177e4SLinus Torvalds /* No partial writes. */ 1481da177e4SLinus Torvalds return -EINVAL; 1491da177e4SLinus Torvalds } 1501da177e4SLinus Torvalds page = (char *)get_zeroed_page(GFP_KERNEL); 1511da177e4SLinus Torvalds if (!page) 1521da177e4SLinus Torvalds return -ENOMEM; 1531da177e4SLinus Torvalds length = -EFAULT; 1541da177e4SLinus Torvalds if (copy_from_user(page, buf, count)) 1551da177e4SLinus Torvalds goto out; 1561da177e4SLinus Torvalds 1571da177e4SLinus Torvalds length = -EINVAL; 1581da177e4SLinus Torvalds if (sscanf(page, "%d", &new_value) != 1) 1591da177e4SLinus Torvalds goto out; 1601da177e4SLinus Torvalds 1611da177e4SLinus Torvalds if (new_value != selinux_enforcing) { 1621da177e4SLinus Torvalds length = task_has_security(current, SECURITY__SETENFORCE); 1631da177e4SLinus Torvalds if (length) 1641da177e4SLinus Torvalds goto out; 165af601e46SSteve Grubb audit_log(current->audit_context, GFP_KERNEL, AUDIT_MAC_STATUS, 1664746ec5bSEric Paris "enforcing=%d old_enforcing=%d auid=%u ses=%u", 1674746ec5bSEric Paris new_value, selinux_enforcing, 1684746ec5bSEric Paris audit_get_loginuid(current), 1694746ec5bSEric Paris audit_get_sessionid(current)); 1701da177e4SLinus Torvalds selinux_enforcing = new_value; 1711da177e4SLinus Torvalds if (selinux_enforcing) 1721da177e4SLinus Torvalds avc_ss_reset(0); 1731da177e4SLinus Torvalds selnl_notify_setenforce(selinux_enforcing); 1741da177e4SLinus Torvalds } 1751da177e4SLinus Torvalds length = count; 1761da177e4SLinus Torvalds out: 1771da177e4SLinus Torvalds free_page((unsigned long) page); 1781da177e4SLinus Torvalds return length; 1791da177e4SLinus Torvalds } 1801da177e4SLinus Torvalds #else 1811da177e4SLinus Torvalds #define sel_write_enforce NULL 1821da177e4SLinus Torvalds #endif 1831da177e4SLinus Torvalds 1849c2e08c5SArjan van de Ven static const struct file_operations sel_enforce_ops = { 1851da177e4SLinus Torvalds .read = sel_read_enforce, 1861da177e4SLinus Torvalds .write = sel_write_enforce, 1871da177e4SLinus Torvalds }; 1881da177e4SLinus Torvalds 1893f12070eSEric Paris static ssize_t sel_read_handle_unknown(struct file *filp, char __user *buf, 1903f12070eSEric Paris size_t count, loff_t *ppos) 1913f12070eSEric Paris { 1923f12070eSEric Paris char tmpbuf[TMPBUFLEN]; 1933f12070eSEric Paris ssize_t length; 1943f12070eSEric Paris ino_t ino = filp->f_path.dentry->d_inode->i_ino; 1953f12070eSEric Paris int handle_unknown = (ino == SEL_REJECT_UNKNOWN) ? 1963f12070eSEric Paris security_get_reject_unknown() : !security_get_allow_unknown(); 1973f12070eSEric Paris 1983f12070eSEric Paris length = scnprintf(tmpbuf, TMPBUFLEN, "%d", handle_unknown); 1993f12070eSEric Paris return simple_read_from_buffer(buf, count, ppos, tmpbuf, length); 2003f12070eSEric Paris } 2013f12070eSEric Paris 2023f12070eSEric Paris static const struct file_operations sel_handle_unknown_ops = { 2033f12070eSEric Paris .read = sel_read_handle_unknown, 2043f12070eSEric Paris }; 2053f12070eSEric Paris 2061da177e4SLinus Torvalds #ifdef CONFIG_SECURITY_SELINUX_DISABLE 2071da177e4SLinus Torvalds static ssize_t sel_write_disable(struct file *file, const char __user *buf, 2081da177e4SLinus Torvalds size_t count, loff_t *ppos) 2091da177e4SLinus Torvalds 2101da177e4SLinus Torvalds { 2111da177e4SLinus Torvalds char *page; 2121da177e4SLinus Torvalds ssize_t length; 2131da177e4SLinus Torvalds int new_value; 2141da177e4SLinus Torvalds extern int selinux_disable(void); 2151da177e4SLinus Torvalds 216bfd51626SDavi Arnaut if (count >= PAGE_SIZE) 2171da177e4SLinus Torvalds return -ENOMEM; 2181da177e4SLinus Torvalds if (*ppos != 0) { 2191da177e4SLinus Torvalds /* No partial writes. */ 2201da177e4SLinus Torvalds return -EINVAL; 2211da177e4SLinus Torvalds } 2221da177e4SLinus Torvalds page = (char *)get_zeroed_page(GFP_KERNEL); 2231da177e4SLinus Torvalds if (!page) 2241da177e4SLinus Torvalds return -ENOMEM; 2251da177e4SLinus Torvalds length = -EFAULT; 2261da177e4SLinus Torvalds if (copy_from_user(page, buf, count)) 2271da177e4SLinus Torvalds goto out; 2281da177e4SLinus Torvalds 2291da177e4SLinus Torvalds length = -EINVAL; 2301da177e4SLinus Torvalds if (sscanf(page, "%d", &new_value) != 1) 2311da177e4SLinus Torvalds goto out; 2321da177e4SLinus Torvalds 2331da177e4SLinus Torvalds if (new_value) { 2341da177e4SLinus Torvalds length = selinux_disable(); 2351da177e4SLinus Torvalds if (length < 0) 2361da177e4SLinus Torvalds goto out; 237af601e46SSteve Grubb audit_log(current->audit_context, GFP_KERNEL, AUDIT_MAC_STATUS, 2384746ec5bSEric Paris "selinux=0 auid=%u ses=%u", 2394746ec5bSEric Paris audit_get_loginuid(current), 2404746ec5bSEric Paris audit_get_sessionid(current)); 2411da177e4SLinus Torvalds } 2421da177e4SLinus Torvalds 2431da177e4SLinus Torvalds length = count; 2441da177e4SLinus Torvalds out: 2451da177e4SLinus Torvalds free_page((unsigned long) page); 2461da177e4SLinus Torvalds return length; 2471da177e4SLinus Torvalds } 2481da177e4SLinus Torvalds #else 2491da177e4SLinus Torvalds #define sel_write_disable NULL 2501da177e4SLinus Torvalds #endif 2511da177e4SLinus Torvalds 2529c2e08c5SArjan van de Ven static const struct file_operations sel_disable_ops = { 2531da177e4SLinus Torvalds .write = sel_write_disable, 2541da177e4SLinus Torvalds }; 2551da177e4SLinus Torvalds 2561da177e4SLinus Torvalds static ssize_t sel_read_policyvers(struct file *filp, char __user *buf, 2571da177e4SLinus Torvalds size_t count, loff_t *ppos) 2581da177e4SLinus Torvalds { 2591da177e4SLinus Torvalds char tmpbuf[TMPBUFLEN]; 2601da177e4SLinus Torvalds ssize_t length; 2611da177e4SLinus Torvalds 2621da177e4SLinus Torvalds length = scnprintf(tmpbuf, TMPBUFLEN, "%u", POLICYDB_VERSION_MAX); 2631da177e4SLinus Torvalds return simple_read_from_buffer(buf, count, ppos, tmpbuf, length); 2641da177e4SLinus Torvalds } 2651da177e4SLinus Torvalds 2669c2e08c5SArjan van de Ven static const struct file_operations sel_policyvers_ops = { 2671da177e4SLinus Torvalds .read = sel_read_policyvers, 2681da177e4SLinus Torvalds }; 2691da177e4SLinus Torvalds 2701da177e4SLinus Torvalds /* declaration for sel_write_load */ 2711da177e4SLinus Torvalds static int sel_make_bools(void); 272e47c8fc5SChristopher J. PeBenito static int sel_make_classes(void); 2733bb56b25SPaul Moore static int sel_make_policycap(void); 274e47c8fc5SChristopher J. PeBenito 275e47c8fc5SChristopher J. PeBenito /* declaration for sel_make_class_dirs */ 276e47c8fc5SChristopher J. PeBenito static int sel_make_dir(struct inode *dir, struct dentry *dentry, 277e47c8fc5SChristopher J. PeBenito unsigned long *ino); 2781da177e4SLinus Torvalds 2791da177e4SLinus Torvalds static ssize_t sel_read_mls(struct file *filp, char __user *buf, 2801da177e4SLinus Torvalds size_t count, loff_t *ppos) 2811da177e4SLinus Torvalds { 2821da177e4SLinus Torvalds char tmpbuf[TMPBUFLEN]; 2831da177e4SLinus Torvalds ssize_t length; 2841da177e4SLinus Torvalds 2851da177e4SLinus Torvalds length = scnprintf(tmpbuf, TMPBUFLEN, "%d", selinux_mls_enabled); 2861da177e4SLinus Torvalds return simple_read_from_buffer(buf, count, ppos, tmpbuf, length); 2871da177e4SLinus Torvalds } 2881da177e4SLinus Torvalds 2899c2e08c5SArjan van de Ven static const struct file_operations sel_mls_ops = { 2901da177e4SLinus Torvalds .read = sel_read_mls, 2911da177e4SLinus Torvalds }; 2921da177e4SLinus Torvalds 2931da177e4SLinus Torvalds static ssize_t sel_write_load(struct file *file, const char __user *buf, 2941da177e4SLinus Torvalds size_t count, loff_t *ppos) 2951da177e4SLinus Torvalds 2961da177e4SLinus Torvalds { 2971da177e4SLinus Torvalds int ret; 2981da177e4SLinus Torvalds ssize_t length; 2991da177e4SLinus Torvalds void *data = NULL; 3001da177e4SLinus Torvalds 301bb003079SIngo Molnar mutex_lock(&sel_mutex); 3021da177e4SLinus Torvalds 3031da177e4SLinus Torvalds length = task_has_security(current, SECURITY__LOAD_POLICY); 3041da177e4SLinus Torvalds if (length) 3051da177e4SLinus Torvalds goto out; 3061da177e4SLinus Torvalds 3071da177e4SLinus Torvalds if (*ppos != 0) { 3081da177e4SLinus Torvalds /* No partial writes. */ 3091da177e4SLinus Torvalds length = -EINVAL; 3101da177e4SLinus Torvalds goto out; 3111da177e4SLinus Torvalds } 3121da177e4SLinus Torvalds 313bfd51626SDavi Arnaut if ((count > 64 * 1024 * 1024) 3141da177e4SLinus Torvalds || (data = vmalloc(count)) == NULL) { 3151da177e4SLinus Torvalds length = -ENOMEM; 3161da177e4SLinus Torvalds goto out; 3171da177e4SLinus Torvalds } 3181da177e4SLinus Torvalds 3191da177e4SLinus Torvalds length = -EFAULT; 3201da177e4SLinus Torvalds if (copy_from_user(data, buf, count) != 0) 3211da177e4SLinus Torvalds goto out; 3221da177e4SLinus Torvalds 3231da177e4SLinus Torvalds length = security_load_policy(data, count); 3241da177e4SLinus Torvalds if (length) 3251da177e4SLinus Torvalds goto out; 3261da177e4SLinus Torvalds 3271da177e4SLinus Torvalds ret = sel_make_bools(); 328e47c8fc5SChristopher J. PeBenito if (ret) { 329e47c8fc5SChristopher J. PeBenito length = ret; 330e47c8fc5SChristopher J. PeBenito goto out1; 331e47c8fc5SChristopher J. PeBenito } 332e47c8fc5SChristopher J. PeBenito 333e47c8fc5SChristopher J. PeBenito ret = sel_make_classes(); 3343bb56b25SPaul Moore if (ret) { 3353bb56b25SPaul Moore length = ret; 3363bb56b25SPaul Moore goto out1; 3373bb56b25SPaul Moore } 3383bb56b25SPaul Moore 3393bb56b25SPaul Moore ret = sel_make_policycap(); 3401da177e4SLinus Torvalds if (ret) 3411da177e4SLinus Torvalds length = ret; 3421da177e4SLinus Torvalds else 3431da177e4SLinus Torvalds length = count; 344e47c8fc5SChristopher J. PeBenito 345e47c8fc5SChristopher J. PeBenito out1: 346af601e46SSteve Grubb audit_log(current->audit_context, GFP_KERNEL, AUDIT_MAC_POLICY_LOAD, 3474746ec5bSEric Paris "policy loaded auid=%u ses=%u", 3484746ec5bSEric Paris audit_get_loginuid(current), 3494746ec5bSEric Paris audit_get_sessionid(current)); 3501da177e4SLinus Torvalds out: 351bb003079SIngo Molnar mutex_unlock(&sel_mutex); 3521da177e4SLinus Torvalds vfree(data); 3531da177e4SLinus Torvalds return length; 3541da177e4SLinus Torvalds } 3551da177e4SLinus Torvalds 3569c2e08c5SArjan van de Ven static const struct file_operations sel_load_ops = { 3571da177e4SLinus Torvalds .write = sel_write_load, 3581da177e4SLinus Torvalds }; 3591da177e4SLinus Torvalds 360ce9982d0SStephen Smalley static ssize_t sel_write_context(struct file *file, char *buf, size_t size) 3611da177e4SLinus Torvalds { 362ce9982d0SStephen Smalley char *canon; 363ce9982d0SStephen Smalley u32 sid, len; 3641da177e4SLinus Torvalds ssize_t length; 3651da177e4SLinus Torvalds 3661da177e4SLinus Torvalds length = task_has_security(current, SECURITY__CHECK_CONTEXT); 3671da177e4SLinus Torvalds if (length) 3681da177e4SLinus Torvalds return length; 3691da177e4SLinus Torvalds 370ce9982d0SStephen Smalley length = security_context_to_sid(buf, size, &sid); 3711da177e4SLinus Torvalds if (length < 0) 372ce9982d0SStephen Smalley return length; 3731da177e4SLinus Torvalds 374ce9982d0SStephen Smalley length = security_sid_to_context(sid, &canon, &len); 375ce9982d0SStephen Smalley if (length < 0) 376ce9982d0SStephen Smalley return length; 377ce9982d0SStephen Smalley 378ce9982d0SStephen Smalley if (len > SIMPLE_TRANSACTION_LIMIT) { 379744ba35eSEric Paris printk(KERN_ERR "SELinux: %s: context size (%u) exceeds " 380744ba35eSEric Paris "payload max\n", __func__, len); 381ce9982d0SStephen Smalley length = -ERANGE; 382ce9982d0SStephen Smalley goto out; 383ce9982d0SStephen Smalley } 384ce9982d0SStephen Smalley 385ce9982d0SStephen Smalley memcpy(buf, canon, len); 386ce9982d0SStephen Smalley length = len; 3871da177e4SLinus Torvalds out: 388ce9982d0SStephen Smalley kfree(canon); 3891da177e4SLinus Torvalds return length; 3901da177e4SLinus Torvalds } 3911da177e4SLinus Torvalds 3921da177e4SLinus Torvalds static ssize_t sel_read_checkreqprot(struct file *filp, char __user *buf, 3931da177e4SLinus Torvalds size_t count, loff_t *ppos) 3941da177e4SLinus Torvalds { 3951da177e4SLinus Torvalds char tmpbuf[TMPBUFLEN]; 3961da177e4SLinus Torvalds ssize_t length; 3971da177e4SLinus Torvalds 3981da177e4SLinus Torvalds length = scnprintf(tmpbuf, TMPBUFLEN, "%u", selinux_checkreqprot); 3991da177e4SLinus Torvalds return simple_read_from_buffer(buf, count, ppos, tmpbuf, length); 4001da177e4SLinus Torvalds } 4011da177e4SLinus Torvalds 4021da177e4SLinus Torvalds static ssize_t sel_write_checkreqprot(struct file *file, const char __user *buf, 4031da177e4SLinus Torvalds size_t count, loff_t *ppos) 4041da177e4SLinus Torvalds { 4051da177e4SLinus Torvalds char *page; 4061da177e4SLinus Torvalds ssize_t length; 4071da177e4SLinus Torvalds unsigned int new_value; 4081da177e4SLinus Torvalds 4091da177e4SLinus Torvalds length = task_has_security(current, SECURITY__SETCHECKREQPROT); 4101da177e4SLinus Torvalds if (length) 4111da177e4SLinus Torvalds return length; 4121da177e4SLinus Torvalds 413bfd51626SDavi Arnaut if (count >= PAGE_SIZE) 4141da177e4SLinus Torvalds return -ENOMEM; 4151da177e4SLinus Torvalds if (*ppos != 0) { 4161da177e4SLinus Torvalds /* No partial writes. */ 4171da177e4SLinus Torvalds return -EINVAL; 4181da177e4SLinus Torvalds } 4191da177e4SLinus Torvalds page = (char *)get_zeroed_page(GFP_KERNEL); 4201da177e4SLinus Torvalds if (!page) 4211da177e4SLinus Torvalds return -ENOMEM; 4221da177e4SLinus Torvalds length = -EFAULT; 4231da177e4SLinus Torvalds if (copy_from_user(page, buf, count)) 4241da177e4SLinus Torvalds goto out; 4251da177e4SLinus Torvalds 4261da177e4SLinus Torvalds length = -EINVAL; 4271da177e4SLinus Torvalds if (sscanf(page, "%u", &new_value) != 1) 4281da177e4SLinus Torvalds goto out; 4291da177e4SLinus Torvalds 4301da177e4SLinus Torvalds selinux_checkreqprot = new_value ? 1 : 0; 4311da177e4SLinus Torvalds length = count; 4321da177e4SLinus Torvalds out: 4331da177e4SLinus Torvalds free_page((unsigned long) page); 4341da177e4SLinus Torvalds return length; 4351da177e4SLinus Torvalds } 4369c2e08c5SArjan van de Ven static const struct file_operations sel_checkreqprot_ops = { 4371da177e4SLinus Torvalds .read = sel_read_checkreqprot, 4381da177e4SLinus Torvalds .write = sel_write_checkreqprot, 4391da177e4SLinus Torvalds }; 4401da177e4SLinus Torvalds 4411da177e4SLinus Torvalds /* 4421da177e4SLinus Torvalds * Remaining nodes use transaction based IO methods like nfsd/nfsctl.c 4431da177e4SLinus Torvalds */ 4441da177e4SLinus Torvalds static ssize_t sel_write_access(struct file *file, char *buf, size_t size); 4451da177e4SLinus Torvalds static ssize_t sel_write_create(struct file *file, char *buf, size_t size); 4461da177e4SLinus Torvalds static ssize_t sel_write_relabel(struct file *file, char *buf, size_t size); 4471da177e4SLinus Torvalds static ssize_t sel_write_user(struct file *file, char *buf, size_t size); 4481da177e4SLinus Torvalds static ssize_t sel_write_member(struct file *file, char *buf, size_t size); 4491da177e4SLinus Torvalds 4501da177e4SLinus Torvalds static ssize_t (*write_op[])(struct file *, char *, size_t) = { 4511da177e4SLinus Torvalds [SEL_ACCESS] = sel_write_access, 4521da177e4SLinus Torvalds [SEL_CREATE] = sel_write_create, 4531da177e4SLinus Torvalds [SEL_RELABEL] = sel_write_relabel, 4541da177e4SLinus Torvalds [SEL_USER] = sel_write_user, 4551da177e4SLinus Torvalds [SEL_MEMBER] = sel_write_member, 456ce9982d0SStephen Smalley [SEL_CONTEXT] = sel_write_context, 4571da177e4SLinus Torvalds }; 4581da177e4SLinus Torvalds 4591da177e4SLinus Torvalds static ssize_t selinux_transaction_write(struct file *file, const char __user *buf, size_t size, loff_t *pos) 4601da177e4SLinus Torvalds { 4613d5ff529SJosef Sipek ino_t ino = file->f_path.dentry->d_inode->i_ino; 4621da177e4SLinus Torvalds char *data; 4631da177e4SLinus Torvalds ssize_t rv; 4641da177e4SLinus Torvalds 4656e20a64aSNicolas Kaiser if (ino >= ARRAY_SIZE(write_op) || !write_op[ino]) 4661da177e4SLinus Torvalds return -EINVAL; 4671da177e4SLinus Torvalds 4681da177e4SLinus Torvalds data = simple_transaction_get(file, buf, size); 4691da177e4SLinus Torvalds if (IS_ERR(data)) 4701da177e4SLinus Torvalds return PTR_ERR(data); 4711da177e4SLinus Torvalds 4721da177e4SLinus Torvalds rv = write_op[ino](file, data, size); 4731da177e4SLinus Torvalds if (rv > 0) { 4741da177e4SLinus Torvalds simple_transaction_set(file, rv); 4751da177e4SLinus Torvalds rv = size; 4761da177e4SLinus Torvalds } 4771da177e4SLinus Torvalds return rv; 4781da177e4SLinus Torvalds } 4791da177e4SLinus Torvalds 4809c2e08c5SArjan van de Ven static const struct file_operations transaction_ops = { 4811da177e4SLinus Torvalds .write = selinux_transaction_write, 4821da177e4SLinus Torvalds .read = simple_transaction_read, 4831da177e4SLinus Torvalds .release = simple_transaction_release, 4841da177e4SLinus Torvalds }; 4851da177e4SLinus Torvalds 4861da177e4SLinus Torvalds /* 4871da177e4SLinus Torvalds * payload - write methods 4881da177e4SLinus Torvalds * If the method has a response, the response should be put in buf, 4891da177e4SLinus Torvalds * and the length returned. Otherwise return 0 or and -error. 4901da177e4SLinus Torvalds */ 4911da177e4SLinus Torvalds 4921da177e4SLinus Torvalds static ssize_t sel_write_access(struct file *file, char *buf, size_t size) 4931da177e4SLinus Torvalds { 4941da177e4SLinus Torvalds char *scon, *tcon; 4951da177e4SLinus Torvalds u32 ssid, tsid; 4961da177e4SLinus Torvalds u16 tclass; 4971da177e4SLinus Torvalds struct av_decision avd; 4981da177e4SLinus Torvalds ssize_t length; 4991da177e4SLinus Torvalds 5001da177e4SLinus Torvalds length = task_has_security(current, SECURITY__COMPUTE_AV); 5011da177e4SLinus Torvalds if (length) 5021da177e4SLinus Torvalds return length; 5031da177e4SLinus Torvalds 5041da177e4SLinus Torvalds length = -ENOMEM; 50589d155efSJames Morris scon = kzalloc(size+1, GFP_KERNEL); 5061da177e4SLinus Torvalds if (!scon) 5071da177e4SLinus Torvalds return length; 5081da177e4SLinus Torvalds 50989d155efSJames Morris tcon = kzalloc(size+1, GFP_KERNEL); 5101da177e4SLinus Torvalds if (!tcon) 5111da177e4SLinus Torvalds goto out; 5121da177e4SLinus Torvalds 5131da177e4SLinus Torvalds length = -EINVAL; 51419439d05SStephen Smalley if (sscanf(buf, "%s %s %hu", scon, tcon, &tclass) != 3) 5151da177e4SLinus Torvalds goto out2; 5161da177e4SLinus Torvalds 5171da177e4SLinus Torvalds length = security_context_to_sid(scon, strlen(scon)+1, &ssid); 5181da177e4SLinus Torvalds if (length < 0) 5191da177e4SLinus Torvalds goto out2; 5201da177e4SLinus Torvalds length = security_context_to_sid(tcon, strlen(tcon)+1, &tsid); 5211da177e4SLinus Torvalds if (length < 0) 5221da177e4SLinus Torvalds goto out2; 5231da177e4SLinus Torvalds 52419439d05SStephen Smalley security_compute_av_user(ssid, tsid, tclass, &avd); 5251da177e4SLinus Torvalds 5261da177e4SLinus Torvalds length = scnprintf(buf, SIMPLE_TRANSACTION_LIMIT, 5278a6f83afSKaiGai Kohei "%x %x %x %x %u %x", 528f1c6381aSEric Paris avd.allowed, 0xffffffff, 5291da177e4SLinus Torvalds avd.auditallow, avd.auditdeny, 5308a6f83afSKaiGai Kohei avd.seqno, avd.flags); 5311da177e4SLinus Torvalds out2: 5321da177e4SLinus Torvalds kfree(tcon); 5331da177e4SLinus Torvalds out: 5341da177e4SLinus Torvalds kfree(scon); 5351da177e4SLinus Torvalds return length; 5361da177e4SLinus Torvalds } 5371da177e4SLinus Torvalds 5381da177e4SLinus Torvalds static ssize_t sel_write_create(struct file *file, char *buf, size_t size) 5391da177e4SLinus Torvalds { 5401da177e4SLinus Torvalds char *scon, *tcon; 5411da177e4SLinus Torvalds u32 ssid, tsid, newsid; 5421da177e4SLinus Torvalds u16 tclass; 5431da177e4SLinus Torvalds ssize_t length; 5441da177e4SLinus Torvalds char *newcon; 5451da177e4SLinus Torvalds u32 len; 5461da177e4SLinus Torvalds 5471da177e4SLinus Torvalds length = task_has_security(current, SECURITY__COMPUTE_CREATE); 5481da177e4SLinus Torvalds if (length) 5491da177e4SLinus Torvalds return length; 5501da177e4SLinus Torvalds 5511da177e4SLinus Torvalds length = -ENOMEM; 55289d155efSJames Morris scon = kzalloc(size+1, GFP_KERNEL); 5531da177e4SLinus Torvalds if (!scon) 5541da177e4SLinus Torvalds return length; 5551da177e4SLinus Torvalds 55689d155efSJames Morris tcon = kzalloc(size+1, GFP_KERNEL); 5571da177e4SLinus Torvalds if (!tcon) 5581da177e4SLinus Torvalds goto out; 5591da177e4SLinus Torvalds 5601da177e4SLinus Torvalds length = -EINVAL; 5611da177e4SLinus Torvalds if (sscanf(buf, "%s %s %hu", scon, tcon, &tclass) != 3) 5621da177e4SLinus Torvalds goto out2; 5631da177e4SLinus Torvalds 5641da177e4SLinus Torvalds length = security_context_to_sid(scon, strlen(scon)+1, &ssid); 5651da177e4SLinus Torvalds if (length < 0) 5661da177e4SLinus Torvalds goto out2; 5671da177e4SLinus Torvalds length = security_context_to_sid(tcon, strlen(tcon)+1, &tsid); 5681da177e4SLinus Torvalds if (length < 0) 5691da177e4SLinus Torvalds goto out2; 5701da177e4SLinus Torvalds 571c6d3aaa4SStephen Smalley length = security_transition_sid_user(ssid, tsid, tclass, &newsid); 5721da177e4SLinus Torvalds if (length < 0) 5731da177e4SLinus Torvalds goto out2; 5741da177e4SLinus Torvalds 5751da177e4SLinus Torvalds length = security_sid_to_context(newsid, &newcon, &len); 5761da177e4SLinus Torvalds if (length < 0) 5771da177e4SLinus Torvalds goto out2; 5781da177e4SLinus Torvalds 5791da177e4SLinus Torvalds if (len > SIMPLE_TRANSACTION_LIMIT) { 580744ba35eSEric Paris printk(KERN_ERR "SELinux: %s: context size (%u) exceeds " 581744ba35eSEric Paris "payload max\n", __func__, len); 5821da177e4SLinus Torvalds length = -ERANGE; 5831da177e4SLinus Torvalds goto out3; 5841da177e4SLinus Torvalds } 5851da177e4SLinus Torvalds 5861da177e4SLinus Torvalds memcpy(buf, newcon, len); 5871da177e4SLinus Torvalds length = len; 5881da177e4SLinus Torvalds out3: 5891da177e4SLinus Torvalds kfree(newcon); 5901da177e4SLinus Torvalds out2: 5911da177e4SLinus Torvalds kfree(tcon); 5921da177e4SLinus Torvalds out: 5931da177e4SLinus Torvalds kfree(scon); 5941da177e4SLinus Torvalds return length; 5951da177e4SLinus Torvalds } 5961da177e4SLinus Torvalds 5971da177e4SLinus Torvalds static ssize_t sel_write_relabel(struct file *file, char *buf, size_t size) 5981da177e4SLinus Torvalds { 5991da177e4SLinus Torvalds char *scon, *tcon; 6001da177e4SLinus Torvalds u32 ssid, tsid, newsid; 6011da177e4SLinus Torvalds u16 tclass; 6021da177e4SLinus Torvalds ssize_t length; 6031da177e4SLinus Torvalds char *newcon; 6041da177e4SLinus Torvalds u32 len; 6051da177e4SLinus Torvalds 6061da177e4SLinus Torvalds length = task_has_security(current, SECURITY__COMPUTE_RELABEL); 6071da177e4SLinus Torvalds if (length) 6081da177e4SLinus Torvalds return length; 6091da177e4SLinus Torvalds 6101da177e4SLinus Torvalds length = -ENOMEM; 61189d155efSJames Morris scon = kzalloc(size+1, GFP_KERNEL); 6121da177e4SLinus Torvalds if (!scon) 6131da177e4SLinus Torvalds return length; 6141da177e4SLinus Torvalds 61589d155efSJames Morris tcon = kzalloc(size+1, GFP_KERNEL); 6161da177e4SLinus Torvalds if (!tcon) 6171da177e4SLinus Torvalds goto out; 6181da177e4SLinus Torvalds 6191da177e4SLinus Torvalds length = -EINVAL; 6201da177e4SLinus Torvalds if (sscanf(buf, "%s %s %hu", scon, tcon, &tclass) != 3) 6211da177e4SLinus Torvalds goto out2; 6221da177e4SLinus Torvalds 6231da177e4SLinus Torvalds length = security_context_to_sid(scon, strlen(scon)+1, &ssid); 6241da177e4SLinus Torvalds if (length < 0) 6251da177e4SLinus Torvalds goto out2; 6261da177e4SLinus Torvalds length = security_context_to_sid(tcon, strlen(tcon)+1, &tsid); 6271da177e4SLinus Torvalds if (length < 0) 6281da177e4SLinus Torvalds goto out2; 6291da177e4SLinus Torvalds 6301da177e4SLinus Torvalds length = security_change_sid(ssid, tsid, tclass, &newsid); 6311da177e4SLinus Torvalds if (length < 0) 6321da177e4SLinus Torvalds goto out2; 6331da177e4SLinus Torvalds 6341da177e4SLinus Torvalds length = security_sid_to_context(newsid, &newcon, &len); 6351da177e4SLinus Torvalds if (length < 0) 6361da177e4SLinus Torvalds goto out2; 6371da177e4SLinus Torvalds 6381da177e4SLinus Torvalds if (len > SIMPLE_TRANSACTION_LIMIT) { 6391da177e4SLinus Torvalds length = -ERANGE; 6401da177e4SLinus Torvalds goto out3; 6411da177e4SLinus Torvalds } 6421da177e4SLinus Torvalds 6431da177e4SLinus Torvalds memcpy(buf, newcon, len); 6441da177e4SLinus Torvalds length = len; 6451da177e4SLinus Torvalds out3: 6461da177e4SLinus Torvalds kfree(newcon); 6471da177e4SLinus Torvalds out2: 6481da177e4SLinus Torvalds kfree(tcon); 6491da177e4SLinus Torvalds out: 6501da177e4SLinus Torvalds kfree(scon); 6511da177e4SLinus Torvalds return length; 6521da177e4SLinus Torvalds } 6531da177e4SLinus Torvalds 6541da177e4SLinus Torvalds static ssize_t sel_write_user(struct file *file, char *buf, size_t size) 6551da177e4SLinus Torvalds { 6561da177e4SLinus Torvalds char *con, *user, *ptr; 6571da177e4SLinus Torvalds u32 sid, *sids; 6581da177e4SLinus Torvalds ssize_t length; 6591da177e4SLinus Torvalds char *newcon; 6601da177e4SLinus Torvalds int i, rc; 6611da177e4SLinus Torvalds u32 len, nsids; 6621da177e4SLinus Torvalds 6631da177e4SLinus Torvalds length = task_has_security(current, SECURITY__COMPUTE_USER); 6641da177e4SLinus Torvalds if (length) 6651da177e4SLinus Torvalds return length; 6661da177e4SLinus Torvalds 6671da177e4SLinus Torvalds length = -ENOMEM; 66889d155efSJames Morris con = kzalloc(size+1, GFP_KERNEL); 6691da177e4SLinus Torvalds if (!con) 6701da177e4SLinus Torvalds return length; 6711da177e4SLinus Torvalds 67289d155efSJames Morris user = kzalloc(size+1, GFP_KERNEL); 6731da177e4SLinus Torvalds if (!user) 6741da177e4SLinus Torvalds goto out; 6751da177e4SLinus Torvalds 6761da177e4SLinus Torvalds length = -EINVAL; 6771da177e4SLinus Torvalds if (sscanf(buf, "%s %s", con, user) != 2) 6781da177e4SLinus Torvalds goto out2; 6791da177e4SLinus Torvalds 6801da177e4SLinus Torvalds length = security_context_to_sid(con, strlen(con)+1, &sid); 6811da177e4SLinus Torvalds if (length < 0) 6821da177e4SLinus Torvalds goto out2; 6831da177e4SLinus Torvalds 6841da177e4SLinus Torvalds length = security_get_user_sids(sid, user, &sids, &nsids); 6851da177e4SLinus Torvalds if (length < 0) 6861da177e4SLinus Torvalds goto out2; 6871da177e4SLinus Torvalds 6881da177e4SLinus Torvalds length = sprintf(buf, "%u", nsids) + 1; 6891da177e4SLinus Torvalds ptr = buf + length; 6901da177e4SLinus Torvalds for (i = 0; i < nsids; i++) { 6911da177e4SLinus Torvalds rc = security_sid_to_context(sids[i], &newcon, &len); 6921da177e4SLinus Torvalds if (rc) { 6931da177e4SLinus Torvalds length = rc; 6941da177e4SLinus Torvalds goto out3; 6951da177e4SLinus Torvalds } 6961da177e4SLinus Torvalds if ((length + len) >= SIMPLE_TRANSACTION_LIMIT) { 6971da177e4SLinus Torvalds kfree(newcon); 6981da177e4SLinus Torvalds length = -ERANGE; 6991da177e4SLinus Torvalds goto out3; 7001da177e4SLinus Torvalds } 7011da177e4SLinus Torvalds memcpy(ptr, newcon, len); 7021da177e4SLinus Torvalds kfree(newcon); 7031da177e4SLinus Torvalds ptr += len; 7041da177e4SLinus Torvalds length += len; 7051da177e4SLinus Torvalds } 7061da177e4SLinus Torvalds out3: 7071da177e4SLinus Torvalds kfree(sids); 7081da177e4SLinus Torvalds out2: 7091da177e4SLinus Torvalds kfree(user); 7101da177e4SLinus Torvalds out: 7111da177e4SLinus Torvalds kfree(con); 7121da177e4SLinus Torvalds return length; 7131da177e4SLinus Torvalds } 7141da177e4SLinus Torvalds 7151da177e4SLinus Torvalds static ssize_t sel_write_member(struct file *file, char *buf, size_t size) 7161da177e4SLinus Torvalds { 7171da177e4SLinus Torvalds char *scon, *tcon; 7181da177e4SLinus Torvalds u32 ssid, tsid, newsid; 7191da177e4SLinus Torvalds u16 tclass; 7201da177e4SLinus Torvalds ssize_t length; 7211da177e4SLinus Torvalds char *newcon; 7221da177e4SLinus Torvalds u32 len; 7231da177e4SLinus Torvalds 7241da177e4SLinus Torvalds length = task_has_security(current, SECURITY__COMPUTE_MEMBER); 7251da177e4SLinus Torvalds if (length) 7261da177e4SLinus Torvalds return length; 7271da177e4SLinus Torvalds 7281da177e4SLinus Torvalds length = -ENOMEM; 72989d155efSJames Morris scon = kzalloc(size+1, GFP_KERNEL); 7301da177e4SLinus Torvalds if (!scon) 7311da177e4SLinus Torvalds return length; 7321da177e4SLinus Torvalds 73389d155efSJames Morris tcon = kzalloc(size+1, GFP_KERNEL); 7341da177e4SLinus Torvalds if (!tcon) 7351da177e4SLinus Torvalds goto out; 7361da177e4SLinus Torvalds 7371da177e4SLinus Torvalds length = -EINVAL; 7381da177e4SLinus Torvalds if (sscanf(buf, "%s %s %hu", scon, tcon, &tclass) != 3) 7391da177e4SLinus Torvalds goto out2; 7401da177e4SLinus Torvalds 7411da177e4SLinus Torvalds length = security_context_to_sid(scon, strlen(scon)+1, &ssid); 7421da177e4SLinus Torvalds if (length < 0) 7431da177e4SLinus Torvalds goto out2; 7441da177e4SLinus Torvalds length = security_context_to_sid(tcon, strlen(tcon)+1, &tsid); 7451da177e4SLinus Torvalds if (length < 0) 7461da177e4SLinus Torvalds goto out2; 7471da177e4SLinus Torvalds 7481da177e4SLinus Torvalds length = security_member_sid(ssid, tsid, tclass, &newsid); 7491da177e4SLinus Torvalds if (length < 0) 7501da177e4SLinus Torvalds goto out2; 7511da177e4SLinus Torvalds 7521da177e4SLinus Torvalds length = security_sid_to_context(newsid, &newcon, &len); 7531da177e4SLinus Torvalds if (length < 0) 7541da177e4SLinus Torvalds goto out2; 7551da177e4SLinus Torvalds 7561da177e4SLinus Torvalds if (len > SIMPLE_TRANSACTION_LIMIT) { 757744ba35eSEric Paris printk(KERN_ERR "SELinux: %s: context size (%u) exceeds " 758744ba35eSEric Paris "payload max\n", __func__, len); 7591da177e4SLinus Torvalds length = -ERANGE; 7601da177e4SLinus Torvalds goto out3; 7611da177e4SLinus Torvalds } 7621da177e4SLinus Torvalds 7631da177e4SLinus Torvalds memcpy(buf, newcon, len); 7641da177e4SLinus Torvalds length = len; 7651da177e4SLinus Torvalds out3: 7661da177e4SLinus Torvalds kfree(newcon); 7671da177e4SLinus Torvalds out2: 7681da177e4SLinus Torvalds kfree(tcon); 7691da177e4SLinus Torvalds out: 7701da177e4SLinus Torvalds kfree(scon); 7711da177e4SLinus Torvalds return length; 7721da177e4SLinus Torvalds } 7731da177e4SLinus Torvalds 7741da177e4SLinus Torvalds static struct inode *sel_make_inode(struct super_block *sb, int mode) 7751da177e4SLinus Torvalds { 7761da177e4SLinus Torvalds struct inode *ret = new_inode(sb); 7771da177e4SLinus Torvalds 7781da177e4SLinus Torvalds if (ret) { 7791da177e4SLinus Torvalds ret->i_mode = mode; 7801da177e4SLinus Torvalds ret->i_atime = ret->i_mtime = ret->i_ctime = CURRENT_TIME; 7811da177e4SLinus Torvalds } 7821da177e4SLinus Torvalds return ret; 7831da177e4SLinus Torvalds } 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; 792d313f948SStephen Smalley struct inode *inode = filep->f_path.dentry->d_inode; 793d313f948SStephen Smalley unsigned index = inode->i_ino & SEL_INO_MASK; 794d313f948SStephen Smalley const char *name = filep->f_path.dentry->d_name.name; 7951da177e4SLinus Torvalds 796bb003079SIngo Molnar mutex_lock(&sel_mutex); 7971da177e4SLinus Torvalds 798d313f948SStephen Smalley if (index >= bool_num || strcmp(name, bool_pending_names[index])) { 799d313f948SStephen Smalley ret = -EINVAL; 800d313f948SStephen Smalley goto out; 801d313f948SStephen Smalley } 8021da177e4SLinus Torvalds 8031872981bSEric Paris page = (char *)get_zeroed_page(GFP_KERNEL); 8041872981bSEric Paris if (!page) { 8051da177e4SLinus Torvalds ret = -ENOMEM; 8061da177e4SLinus Torvalds goto out; 8071da177e4SLinus Torvalds } 8081da177e4SLinus Torvalds 809d313f948SStephen Smalley cur_enforcing = security_get_bool_value(index); 8101da177e4SLinus Torvalds if (cur_enforcing < 0) { 8111da177e4SLinus Torvalds ret = cur_enforcing; 8121da177e4SLinus Torvalds goto out; 8131da177e4SLinus Torvalds } 8141da177e4SLinus Torvalds length = scnprintf(page, PAGE_SIZE, "%d %d", cur_enforcing, 815d313f948SStephen Smalley bool_pending_values[index]); 81668bdcf28SStephen Smalley ret = simple_read_from_buffer(buf, count, ppos, page, length); 8171da177e4SLinus Torvalds out: 818bb003079SIngo Molnar mutex_unlock(&sel_mutex); 8191da177e4SLinus Torvalds if (page) 8201da177e4SLinus Torvalds free_page((unsigned long)page); 8211da177e4SLinus Torvalds return ret; 8221da177e4SLinus Torvalds } 8231da177e4SLinus Torvalds 8241da177e4SLinus Torvalds static ssize_t sel_write_bool(struct file *filep, const char __user *buf, 8251da177e4SLinus Torvalds size_t count, loff_t *ppos) 8261da177e4SLinus Torvalds { 8271da177e4SLinus Torvalds char *page = NULL; 828d313f948SStephen Smalley ssize_t length; 8291da177e4SLinus Torvalds int new_value; 830d313f948SStephen Smalley struct inode *inode = filep->f_path.dentry->d_inode; 831d313f948SStephen Smalley unsigned index = inode->i_ino & SEL_INO_MASK; 832d313f948SStephen Smalley const char *name = filep->f_path.dentry->d_name.name; 8331da177e4SLinus Torvalds 834bb003079SIngo Molnar mutex_lock(&sel_mutex); 8351da177e4SLinus Torvalds 8361da177e4SLinus Torvalds length = task_has_security(current, SECURITY__SETBOOL); 8371da177e4SLinus Torvalds if (length) 8381da177e4SLinus Torvalds goto out; 8391da177e4SLinus Torvalds 840d313f948SStephen Smalley if (index >= bool_num || strcmp(name, bool_pending_names[index])) { 841d313f948SStephen Smalley length = -EINVAL; 842d313f948SStephen Smalley goto out; 843d313f948SStephen Smalley } 844d313f948SStephen Smalley 845bfd51626SDavi Arnaut if (count >= PAGE_SIZE) { 8461da177e4SLinus Torvalds length = -ENOMEM; 8471da177e4SLinus Torvalds goto out; 8481da177e4SLinus Torvalds } 849d313f948SStephen Smalley 8501da177e4SLinus Torvalds if (*ppos != 0) { 8511da177e4SLinus Torvalds /* No partial writes. */ 852d313f948SStephen Smalley length = -EINVAL; 8531da177e4SLinus Torvalds goto out; 8541da177e4SLinus Torvalds } 8551da177e4SLinus Torvalds page = (char *)get_zeroed_page(GFP_KERNEL); 8561da177e4SLinus Torvalds if (!page) { 8571da177e4SLinus Torvalds length = -ENOMEM; 8581da177e4SLinus Torvalds goto out; 8591da177e4SLinus Torvalds } 8601da177e4SLinus Torvalds 861d313f948SStephen Smalley length = -EFAULT; 8621da177e4SLinus Torvalds if (copy_from_user(page, buf, count)) 8631da177e4SLinus Torvalds goto out; 8641da177e4SLinus Torvalds 8651da177e4SLinus Torvalds length = -EINVAL; 8661da177e4SLinus Torvalds if (sscanf(page, "%d", &new_value) != 1) 8671da177e4SLinus Torvalds goto out; 8681da177e4SLinus Torvalds 8691da177e4SLinus Torvalds if (new_value) 8701da177e4SLinus Torvalds new_value = 1; 8711da177e4SLinus Torvalds 872d313f948SStephen Smalley bool_pending_values[index] = new_value; 8731da177e4SLinus Torvalds length = count; 8741da177e4SLinus Torvalds 8751da177e4SLinus Torvalds out: 876bb003079SIngo Molnar mutex_unlock(&sel_mutex); 8771da177e4SLinus Torvalds if (page) 8781da177e4SLinus Torvalds free_page((unsigned long) page); 8791da177e4SLinus Torvalds return length; 8801da177e4SLinus Torvalds } 8811da177e4SLinus Torvalds 8829c2e08c5SArjan van de Ven static const struct file_operations sel_bool_ops = { 8831da177e4SLinus Torvalds .read = sel_read_bool, 8841da177e4SLinus Torvalds .write = sel_write_bool, 8851da177e4SLinus Torvalds }; 8861da177e4SLinus Torvalds 8871da177e4SLinus Torvalds static ssize_t sel_commit_bools_write(struct file *filep, 8881da177e4SLinus Torvalds const char __user *buf, 8891da177e4SLinus Torvalds size_t count, loff_t *ppos) 8901da177e4SLinus Torvalds { 8911da177e4SLinus Torvalds char *page = NULL; 892d313f948SStephen Smalley ssize_t length; 8931da177e4SLinus Torvalds int new_value; 8941da177e4SLinus Torvalds 895bb003079SIngo Molnar mutex_lock(&sel_mutex); 8961da177e4SLinus Torvalds 8971da177e4SLinus Torvalds length = task_has_security(current, SECURITY__SETBOOL); 8981da177e4SLinus Torvalds if (length) 8991da177e4SLinus Torvalds goto out; 9001da177e4SLinus Torvalds 901bfd51626SDavi Arnaut if (count >= PAGE_SIZE) { 9021da177e4SLinus Torvalds length = -ENOMEM; 9031da177e4SLinus Torvalds goto out; 9041da177e4SLinus Torvalds } 9051da177e4SLinus Torvalds if (*ppos != 0) { 9061da177e4SLinus Torvalds /* No partial writes. */ 9071da177e4SLinus Torvalds goto out; 9081da177e4SLinus Torvalds } 9091da177e4SLinus Torvalds page = (char *)get_zeroed_page(GFP_KERNEL); 9101da177e4SLinus Torvalds if (!page) { 9111da177e4SLinus Torvalds length = -ENOMEM; 9121da177e4SLinus Torvalds goto out; 9131da177e4SLinus Torvalds } 9141da177e4SLinus Torvalds 915d313f948SStephen Smalley length = -EFAULT; 9161da177e4SLinus Torvalds if (copy_from_user(page, buf, count)) 9171da177e4SLinus Torvalds goto out; 9181da177e4SLinus Torvalds 9191da177e4SLinus Torvalds length = -EINVAL; 9201da177e4SLinus Torvalds if (sscanf(page, "%d", &new_value) != 1) 9211da177e4SLinus Torvalds goto out; 9221da177e4SLinus Torvalds 9231872981bSEric Paris if (new_value && bool_pending_values) 9241da177e4SLinus Torvalds security_set_bools(bool_num, bool_pending_values); 9251da177e4SLinus Torvalds 9261da177e4SLinus Torvalds length = count; 9271da177e4SLinus Torvalds 9281da177e4SLinus Torvalds out: 929bb003079SIngo Molnar mutex_unlock(&sel_mutex); 9301da177e4SLinus Torvalds if (page) 9311da177e4SLinus Torvalds free_page((unsigned long) page); 9321da177e4SLinus Torvalds return length; 9331da177e4SLinus Torvalds } 9341da177e4SLinus Torvalds 9359c2e08c5SArjan van de Ven static const struct file_operations sel_commit_bools_ops = { 9361da177e4SLinus Torvalds .write = sel_commit_bools_write, 9371da177e4SLinus Torvalds }; 9381da177e4SLinus Torvalds 9390c92d7c7SChristopher J. PeBenito static void sel_remove_entries(struct dentry *de) 9401da177e4SLinus Torvalds { 9410955dc03SStephen Smalley struct list_head *node; 9421da177e4SLinus Torvalds 9431da177e4SLinus Torvalds spin_lock(&dcache_lock); 9441da177e4SLinus Torvalds node = de->d_subdirs.next; 9451da177e4SLinus Torvalds while (node != &de->d_subdirs) { 9465160ee6fSEric Dumazet struct dentry *d = list_entry(node, struct dentry, d_u.d_child); 9471da177e4SLinus Torvalds list_del_init(node); 9481da177e4SLinus Torvalds 9491da177e4SLinus Torvalds if (d->d_inode) { 9501da177e4SLinus Torvalds d = dget_locked(d); 9511da177e4SLinus Torvalds spin_unlock(&dcache_lock); 9521da177e4SLinus Torvalds d_delete(d); 9531da177e4SLinus Torvalds simple_unlink(de->d_inode, d); 9541da177e4SLinus Torvalds dput(d); 9551da177e4SLinus Torvalds spin_lock(&dcache_lock); 9561da177e4SLinus Torvalds } 9571da177e4SLinus Torvalds node = de->d_subdirs.next; 9581da177e4SLinus Torvalds } 9591da177e4SLinus Torvalds 9601da177e4SLinus Torvalds spin_unlock(&dcache_lock); 9611da177e4SLinus Torvalds } 9621da177e4SLinus Torvalds 9631da177e4SLinus Torvalds #define BOOL_DIR_NAME "booleans" 9641da177e4SLinus Torvalds 9651da177e4SLinus Torvalds static int sel_make_bools(void) 9661da177e4SLinus Torvalds { 9671da177e4SLinus Torvalds int i, ret = 0; 9681da177e4SLinus Torvalds ssize_t len; 9691da177e4SLinus Torvalds struct dentry *dentry = NULL; 9701da177e4SLinus Torvalds struct dentry *dir = bool_dir; 9711da177e4SLinus Torvalds struct inode *inode = NULL; 9721da177e4SLinus Torvalds struct inode_security_struct *isec; 9731da177e4SLinus Torvalds char **names = NULL, *page; 9741da177e4SLinus Torvalds int num; 9751da177e4SLinus Torvalds int *values = NULL; 9761da177e4SLinus Torvalds u32 sid; 9771da177e4SLinus Torvalds 9781da177e4SLinus Torvalds /* remove any existing files */ 979d313f948SStephen Smalley kfree(bool_pending_names); 9801da177e4SLinus Torvalds kfree(bool_pending_values); 981d313f948SStephen Smalley bool_pending_names = NULL; 98220c19e41SDavi Arnaut bool_pending_values = NULL; 9831da177e4SLinus Torvalds 9840c92d7c7SChristopher J. PeBenito sel_remove_entries(dir); 9851da177e4SLinus Torvalds 9861872981bSEric Paris page = (char *)get_zeroed_page(GFP_KERNEL); 9871872981bSEric Paris if (!page) 9881da177e4SLinus Torvalds return -ENOMEM; 9891da177e4SLinus Torvalds 9901da177e4SLinus Torvalds ret = security_get_bools(&num, &names, &values); 9911da177e4SLinus Torvalds if (ret != 0) 9921da177e4SLinus Torvalds goto out; 9931da177e4SLinus Torvalds 9941da177e4SLinus Torvalds for (i = 0; i < num; i++) { 9951da177e4SLinus Torvalds dentry = d_alloc_name(dir, names[i]); 9961da177e4SLinus Torvalds if (!dentry) { 9971da177e4SLinus Torvalds ret = -ENOMEM; 9981da177e4SLinus Torvalds goto err; 9991da177e4SLinus Torvalds } 10001da177e4SLinus Torvalds inode = sel_make_inode(dir->d_sb, S_IFREG | S_IRUGO | S_IWUSR); 10011da177e4SLinus Torvalds if (!inode) { 10021da177e4SLinus Torvalds ret = -ENOMEM; 10031da177e4SLinus Torvalds goto err; 10041da177e4SLinus Torvalds } 10051da177e4SLinus Torvalds 10061da177e4SLinus Torvalds len = snprintf(page, PAGE_SIZE, "/%s/%s", BOOL_DIR_NAME, names[i]); 10071da177e4SLinus Torvalds if (len < 0) { 10081da177e4SLinus Torvalds ret = -EINVAL; 10091da177e4SLinus Torvalds goto err; 10101da177e4SLinus Torvalds } else if (len >= PAGE_SIZE) { 10111da177e4SLinus Torvalds ret = -ENAMETOOLONG; 10121da177e4SLinus Torvalds goto err; 10131da177e4SLinus Torvalds } 10141da177e4SLinus Torvalds isec = (struct inode_security_struct *)inode->i_security; 10151872981bSEric Paris ret = security_genfs_sid("selinuxfs", page, SECCLASS_FILE, &sid); 10161872981bSEric Paris if (ret) 10171da177e4SLinus Torvalds goto err; 10181da177e4SLinus Torvalds isec->sid = sid; 10191da177e4SLinus Torvalds isec->initialized = 1; 10201da177e4SLinus Torvalds inode->i_fop = &sel_bool_ops; 1021bce34bc0SJames Carter inode->i_ino = i|SEL_BOOL_INO_OFFSET; 10221da177e4SLinus Torvalds d_add(dentry, inode); 10231da177e4SLinus Torvalds } 10241da177e4SLinus Torvalds bool_num = num; 1025d313f948SStephen Smalley bool_pending_names = names; 10261da177e4SLinus Torvalds bool_pending_values = values; 10271da177e4SLinus Torvalds out: 10281da177e4SLinus Torvalds free_page((unsigned long)page); 1029d313f948SStephen Smalley return ret; 1030d313f948SStephen Smalley err: 10311da177e4SLinus Torvalds if (names) { 10329a5f04bfSJesper Juhl for (i = 0; i < num; i++) 10331da177e4SLinus Torvalds kfree(names[i]); 10341da177e4SLinus Torvalds kfree(names); 10351da177e4SLinus Torvalds } 103620c19e41SDavi Arnaut kfree(values); 10370c92d7c7SChristopher J. PeBenito sel_remove_entries(dir); 10381da177e4SLinus Torvalds ret = -ENOMEM; 10391da177e4SLinus Torvalds goto out; 10401da177e4SLinus Torvalds } 10411da177e4SLinus Torvalds 10421da177e4SLinus Torvalds #define NULL_FILE_NAME "null" 10431da177e4SLinus Torvalds 10441872981bSEric Paris struct dentry *selinux_null; 10451da177e4SLinus Torvalds 10461da177e4SLinus Torvalds static ssize_t sel_read_avc_cache_threshold(struct file *filp, char __user *buf, 10471da177e4SLinus Torvalds size_t count, loff_t *ppos) 10481da177e4SLinus Torvalds { 10491da177e4SLinus Torvalds char tmpbuf[TMPBUFLEN]; 10501da177e4SLinus Torvalds ssize_t length; 10511da177e4SLinus Torvalds 10521da177e4SLinus Torvalds length = scnprintf(tmpbuf, TMPBUFLEN, "%u", avc_cache_threshold); 10531da177e4SLinus Torvalds return simple_read_from_buffer(buf, count, ppos, tmpbuf, length); 10541da177e4SLinus Torvalds } 10551da177e4SLinus Torvalds 10561da177e4SLinus Torvalds static ssize_t sel_write_avc_cache_threshold(struct file *file, 10571da177e4SLinus Torvalds const char __user *buf, 10581da177e4SLinus Torvalds size_t count, loff_t *ppos) 10591da177e4SLinus Torvalds 10601da177e4SLinus Torvalds { 10611da177e4SLinus Torvalds char *page; 10621da177e4SLinus Torvalds ssize_t ret; 10631da177e4SLinus Torvalds int new_value; 10641da177e4SLinus Torvalds 1065bfd51626SDavi Arnaut if (count >= PAGE_SIZE) { 10661da177e4SLinus Torvalds ret = -ENOMEM; 10671da177e4SLinus Torvalds goto out; 10681da177e4SLinus Torvalds } 10691da177e4SLinus Torvalds 10701da177e4SLinus Torvalds if (*ppos != 0) { 10711da177e4SLinus Torvalds /* No partial writes. */ 10721da177e4SLinus Torvalds ret = -EINVAL; 10731da177e4SLinus Torvalds goto out; 10741da177e4SLinus Torvalds } 10751da177e4SLinus Torvalds 10761da177e4SLinus Torvalds page = (char *)get_zeroed_page(GFP_KERNEL); 10771da177e4SLinus Torvalds if (!page) { 10781da177e4SLinus Torvalds ret = -ENOMEM; 10791da177e4SLinus Torvalds goto out; 10801da177e4SLinus Torvalds } 10811da177e4SLinus Torvalds 10821da177e4SLinus Torvalds if (copy_from_user(page, buf, count)) { 10831da177e4SLinus Torvalds ret = -EFAULT; 10841da177e4SLinus Torvalds goto out_free; 10851da177e4SLinus Torvalds } 10861da177e4SLinus Torvalds 10871da177e4SLinus Torvalds if (sscanf(page, "%u", &new_value) != 1) { 10881da177e4SLinus Torvalds ret = -EINVAL; 10891da177e4SLinus Torvalds goto out; 10901da177e4SLinus Torvalds } 10911da177e4SLinus Torvalds 10921da177e4SLinus Torvalds if (new_value != avc_cache_threshold) { 10931da177e4SLinus Torvalds ret = task_has_security(current, SECURITY__SETSECPARAM); 10941da177e4SLinus Torvalds if (ret) 10951da177e4SLinus Torvalds goto out_free; 10961da177e4SLinus Torvalds avc_cache_threshold = new_value; 10971da177e4SLinus Torvalds } 10981da177e4SLinus Torvalds ret = count; 10991da177e4SLinus Torvalds out_free: 11001da177e4SLinus Torvalds free_page((unsigned long)page); 11011da177e4SLinus Torvalds out: 11021da177e4SLinus Torvalds return ret; 11031da177e4SLinus Torvalds } 11041da177e4SLinus Torvalds 11051da177e4SLinus Torvalds static ssize_t sel_read_avc_hash_stats(struct file *filp, char __user *buf, 11061da177e4SLinus Torvalds size_t count, loff_t *ppos) 11071da177e4SLinus Torvalds { 11081da177e4SLinus Torvalds char *page; 11091da177e4SLinus Torvalds ssize_t ret = 0; 11101da177e4SLinus Torvalds 11111da177e4SLinus Torvalds page = (char *)__get_free_page(GFP_KERNEL); 11121da177e4SLinus Torvalds if (!page) { 11131da177e4SLinus Torvalds ret = -ENOMEM; 11141da177e4SLinus Torvalds goto out; 11151da177e4SLinus Torvalds } 11161da177e4SLinus Torvalds ret = avc_get_hash_stats(page); 11171da177e4SLinus Torvalds if (ret >= 0) 11181da177e4SLinus Torvalds ret = simple_read_from_buffer(buf, count, ppos, page, ret); 11191da177e4SLinus Torvalds free_page((unsigned long)page); 11201da177e4SLinus Torvalds out: 11211da177e4SLinus Torvalds return ret; 11221da177e4SLinus Torvalds } 11231da177e4SLinus Torvalds 11249c2e08c5SArjan van de Ven static const struct file_operations sel_avc_cache_threshold_ops = { 11251da177e4SLinus Torvalds .read = sel_read_avc_cache_threshold, 11261da177e4SLinus Torvalds .write = sel_write_avc_cache_threshold, 11271da177e4SLinus Torvalds }; 11281da177e4SLinus Torvalds 11299c2e08c5SArjan van de Ven static const struct file_operations sel_avc_hash_stats_ops = { 11301da177e4SLinus Torvalds .read = sel_read_avc_hash_stats, 11311da177e4SLinus Torvalds }; 11321da177e4SLinus Torvalds 11331da177e4SLinus Torvalds #ifdef CONFIG_SECURITY_SELINUX_AVC_STATS 11341da177e4SLinus Torvalds static struct avc_cache_stats *sel_avc_get_stat_idx(loff_t *idx) 11351da177e4SLinus Torvalds { 11361da177e4SLinus Torvalds int cpu; 11371da177e4SLinus Torvalds 11384f4b6c1aSRusty Russell for (cpu = *idx; cpu < nr_cpu_ids; ++cpu) { 11391da177e4SLinus Torvalds if (!cpu_possible(cpu)) 11401da177e4SLinus Torvalds continue; 11411da177e4SLinus Torvalds *idx = cpu + 1; 11421da177e4SLinus Torvalds return &per_cpu(avc_cache_stats, cpu); 11431da177e4SLinus Torvalds } 11441da177e4SLinus Torvalds return NULL; 11451da177e4SLinus Torvalds } 11461da177e4SLinus Torvalds 11471da177e4SLinus Torvalds static void *sel_avc_stats_seq_start(struct seq_file *seq, loff_t *pos) 11481da177e4SLinus Torvalds { 11491da177e4SLinus Torvalds loff_t n = *pos - 1; 11501da177e4SLinus Torvalds 11511da177e4SLinus Torvalds if (*pos == 0) 11521da177e4SLinus Torvalds return SEQ_START_TOKEN; 11531da177e4SLinus Torvalds 11541da177e4SLinus Torvalds return sel_avc_get_stat_idx(&n); 11551da177e4SLinus Torvalds } 11561da177e4SLinus Torvalds 11571da177e4SLinus Torvalds static void *sel_avc_stats_seq_next(struct seq_file *seq, void *v, loff_t *pos) 11581da177e4SLinus Torvalds { 11591da177e4SLinus Torvalds return sel_avc_get_stat_idx(pos); 11601da177e4SLinus Torvalds } 11611da177e4SLinus Torvalds 11621da177e4SLinus Torvalds static int sel_avc_stats_seq_show(struct seq_file *seq, void *v) 11631da177e4SLinus Torvalds { 11641da177e4SLinus Torvalds struct avc_cache_stats *st = v; 11651da177e4SLinus Torvalds 11661da177e4SLinus Torvalds if (v == SEQ_START_TOKEN) 11671da177e4SLinus Torvalds seq_printf(seq, "lookups hits misses allocations reclaims " 11681da177e4SLinus Torvalds "frees\n"); 11691da177e4SLinus Torvalds else 11701da177e4SLinus Torvalds seq_printf(seq, "%u %u %u %u %u %u\n", st->lookups, 11711da177e4SLinus Torvalds st->hits, st->misses, st->allocations, 11721da177e4SLinus Torvalds st->reclaims, st->frees); 11731da177e4SLinus Torvalds return 0; 11741da177e4SLinus Torvalds } 11751da177e4SLinus Torvalds 11761da177e4SLinus Torvalds static void sel_avc_stats_seq_stop(struct seq_file *seq, void *v) 11771da177e4SLinus Torvalds { } 11781da177e4SLinus Torvalds 11791996a109SJan Engelhardt static const struct seq_operations sel_avc_cache_stats_seq_ops = { 11801da177e4SLinus Torvalds .start = sel_avc_stats_seq_start, 11811da177e4SLinus Torvalds .next = sel_avc_stats_seq_next, 11821da177e4SLinus Torvalds .show = sel_avc_stats_seq_show, 11831da177e4SLinus Torvalds .stop = sel_avc_stats_seq_stop, 11841da177e4SLinus Torvalds }; 11851da177e4SLinus Torvalds 11861da177e4SLinus Torvalds static int sel_open_avc_cache_stats(struct inode *inode, struct file *file) 11871da177e4SLinus Torvalds { 11881da177e4SLinus Torvalds return seq_open(file, &sel_avc_cache_stats_seq_ops); 11891da177e4SLinus Torvalds } 11901da177e4SLinus Torvalds 11919c2e08c5SArjan van de Ven static const struct file_operations sel_avc_cache_stats_ops = { 11921da177e4SLinus Torvalds .open = sel_open_avc_cache_stats, 11931da177e4SLinus Torvalds .read = seq_read, 11941da177e4SLinus Torvalds .llseek = seq_lseek, 11951da177e4SLinus Torvalds .release = seq_release, 11961da177e4SLinus Torvalds }; 11971da177e4SLinus Torvalds #endif 11981da177e4SLinus Torvalds 11991da177e4SLinus Torvalds static int sel_make_avc_files(struct dentry *dir) 12001da177e4SLinus Torvalds { 12011da177e4SLinus Torvalds int i, ret = 0; 12021da177e4SLinus Torvalds static struct tree_descr files[] = { 12031da177e4SLinus Torvalds { "cache_threshold", 12041da177e4SLinus Torvalds &sel_avc_cache_threshold_ops, S_IRUGO|S_IWUSR }, 12051da177e4SLinus Torvalds { "hash_stats", &sel_avc_hash_stats_ops, S_IRUGO }, 12061da177e4SLinus Torvalds #ifdef CONFIG_SECURITY_SELINUX_AVC_STATS 12071da177e4SLinus Torvalds { "cache_stats", &sel_avc_cache_stats_ops, S_IRUGO }, 12081da177e4SLinus Torvalds #endif 12091da177e4SLinus Torvalds }; 12101da177e4SLinus Torvalds 12116e20a64aSNicolas Kaiser for (i = 0; i < ARRAY_SIZE(files); i++) { 12121da177e4SLinus Torvalds struct inode *inode; 12131da177e4SLinus Torvalds struct dentry *dentry; 12141da177e4SLinus Torvalds 12151da177e4SLinus Torvalds dentry = d_alloc_name(dir, files[i].name); 12161da177e4SLinus Torvalds if (!dentry) { 12171da177e4SLinus Torvalds ret = -ENOMEM; 1218d6aafa65SJames Morris goto out; 12191da177e4SLinus Torvalds } 12201da177e4SLinus Torvalds 12211da177e4SLinus Torvalds inode = sel_make_inode(dir->d_sb, S_IFREG|files[i].mode); 12221da177e4SLinus Torvalds if (!inode) { 12231da177e4SLinus Torvalds ret = -ENOMEM; 1224d6aafa65SJames Morris goto out; 12251da177e4SLinus Torvalds } 12261da177e4SLinus Torvalds inode->i_fop = files[i].ops; 12276174eafcSJames Carter inode->i_ino = ++sel_last_ino; 12281da177e4SLinus Torvalds d_add(dentry, inode); 12291da177e4SLinus Torvalds } 12301da177e4SLinus Torvalds out: 12311da177e4SLinus Torvalds return ret; 12321da177e4SLinus Torvalds } 12331da177e4SLinus Torvalds 1234f0ee2e46SJames Carter static ssize_t sel_read_initcon(struct file *file, char __user *buf, 1235f0ee2e46SJames Carter size_t count, loff_t *ppos) 1236f0ee2e46SJames Carter { 1237f0ee2e46SJames Carter struct inode *inode; 1238f0ee2e46SJames Carter char *con; 1239f0ee2e46SJames Carter u32 sid, len; 1240f0ee2e46SJames Carter ssize_t ret; 1241f0ee2e46SJames Carter 1242f0ee2e46SJames Carter inode = file->f_path.dentry->d_inode; 1243f0ee2e46SJames Carter sid = inode->i_ino&SEL_INO_MASK; 1244f0ee2e46SJames Carter ret = security_sid_to_context(sid, &con, &len); 1245f0ee2e46SJames Carter if (ret < 0) 1246f0ee2e46SJames Carter return ret; 1247f0ee2e46SJames Carter 1248f0ee2e46SJames Carter ret = simple_read_from_buffer(buf, count, ppos, con, len); 1249f0ee2e46SJames Carter kfree(con); 1250f0ee2e46SJames Carter return ret; 1251f0ee2e46SJames Carter } 1252f0ee2e46SJames Carter 1253f0ee2e46SJames Carter static const struct file_operations sel_initcon_ops = { 1254f0ee2e46SJames Carter .read = sel_read_initcon, 1255f0ee2e46SJames Carter }; 1256f0ee2e46SJames Carter 1257f0ee2e46SJames Carter static int sel_make_initcon_files(struct dentry *dir) 1258f0ee2e46SJames Carter { 1259f0ee2e46SJames Carter int i, ret = 0; 1260f0ee2e46SJames Carter 1261f0ee2e46SJames Carter for (i = 1; i <= SECINITSID_NUM; i++) { 1262f0ee2e46SJames Carter struct inode *inode; 1263f0ee2e46SJames Carter struct dentry *dentry; 1264f0ee2e46SJames Carter dentry = d_alloc_name(dir, security_get_initial_sid_context(i)); 1265f0ee2e46SJames Carter if (!dentry) { 1266f0ee2e46SJames Carter ret = -ENOMEM; 1267f0ee2e46SJames Carter goto out; 1268f0ee2e46SJames Carter } 1269f0ee2e46SJames Carter 1270f0ee2e46SJames Carter inode = sel_make_inode(dir->d_sb, S_IFREG|S_IRUGO); 1271f0ee2e46SJames Carter if (!inode) { 1272f0ee2e46SJames Carter ret = -ENOMEM; 1273f0ee2e46SJames Carter goto out; 1274f0ee2e46SJames Carter } 1275f0ee2e46SJames Carter inode->i_fop = &sel_initcon_ops; 1276f0ee2e46SJames Carter inode->i_ino = i|SEL_INITCON_INO_OFFSET; 1277f0ee2e46SJames Carter d_add(dentry, inode); 1278f0ee2e46SJames Carter } 1279f0ee2e46SJames Carter out: 1280f0ee2e46SJames Carter return ret; 1281f0ee2e46SJames Carter } 1282f0ee2e46SJames Carter 1283e47c8fc5SChristopher J. PeBenito static inline unsigned int sel_div(unsigned long a, unsigned long b) 1284e47c8fc5SChristopher J. PeBenito { 1285e47c8fc5SChristopher J. PeBenito return a / b - (a % b < 0); 1286e47c8fc5SChristopher J. PeBenito } 1287e47c8fc5SChristopher J. PeBenito 1288e47c8fc5SChristopher J. PeBenito static inline unsigned long sel_class_to_ino(u16 class) 1289e47c8fc5SChristopher J. PeBenito { 1290e47c8fc5SChristopher J. PeBenito return (class * (SEL_VEC_MAX + 1)) | SEL_CLASS_INO_OFFSET; 1291e47c8fc5SChristopher J. PeBenito } 1292e47c8fc5SChristopher J. PeBenito 1293e47c8fc5SChristopher J. PeBenito static inline u16 sel_ino_to_class(unsigned long ino) 1294e47c8fc5SChristopher J. PeBenito { 1295e47c8fc5SChristopher J. PeBenito return sel_div(ino & SEL_INO_MASK, SEL_VEC_MAX + 1); 1296e47c8fc5SChristopher J. PeBenito } 1297e47c8fc5SChristopher J. PeBenito 1298e47c8fc5SChristopher J. PeBenito static inline unsigned long sel_perm_to_ino(u16 class, u32 perm) 1299e47c8fc5SChristopher J. PeBenito { 1300e47c8fc5SChristopher J. PeBenito return (class * (SEL_VEC_MAX + 1) + perm) | SEL_CLASS_INO_OFFSET; 1301e47c8fc5SChristopher J. PeBenito } 1302e47c8fc5SChristopher J. PeBenito 1303e47c8fc5SChristopher J. PeBenito static inline u32 sel_ino_to_perm(unsigned long ino) 1304e47c8fc5SChristopher J. PeBenito { 1305e47c8fc5SChristopher J. PeBenito return (ino & SEL_INO_MASK) % (SEL_VEC_MAX + 1); 1306e47c8fc5SChristopher J. PeBenito } 1307e47c8fc5SChristopher J. PeBenito 1308e47c8fc5SChristopher J. PeBenito static ssize_t sel_read_class(struct file *file, char __user *buf, 1309e47c8fc5SChristopher J. PeBenito size_t count, loff_t *ppos) 1310e47c8fc5SChristopher J. PeBenito { 1311e47c8fc5SChristopher J. PeBenito ssize_t rc, len; 1312e47c8fc5SChristopher J. PeBenito char *page; 1313e47c8fc5SChristopher J. PeBenito unsigned long ino = file->f_path.dentry->d_inode->i_ino; 1314e47c8fc5SChristopher J. PeBenito 1315e47c8fc5SChristopher J. PeBenito page = (char *)__get_free_page(GFP_KERNEL); 1316e47c8fc5SChristopher J. PeBenito if (!page) { 1317e47c8fc5SChristopher J. PeBenito rc = -ENOMEM; 1318e47c8fc5SChristopher J. PeBenito goto out; 1319e47c8fc5SChristopher J. PeBenito } 1320e47c8fc5SChristopher J. PeBenito 1321e47c8fc5SChristopher J. PeBenito len = snprintf(page, PAGE_SIZE, "%d", sel_ino_to_class(ino)); 1322e47c8fc5SChristopher J. PeBenito rc = simple_read_from_buffer(buf, count, ppos, page, len); 1323e47c8fc5SChristopher J. PeBenito free_page((unsigned long)page); 1324e47c8fc5SChristopher J. PeBenito out: 1325e47c8fc5SChristopher J. PeBenito return rc; 1326e47c8fc5SChristopher J. PeBenito } 1327e47c8fc5SChristopher J. PeBenito 1328e47c8fc5SChristopher J. PeBenito static const struct file_operations sel_class_ops = { 1329e47c8fc5SChristopher J. PeBenito .read = sel_read_class, 1330e47c8fc5SChristopher J. PeBenito }; 1331e47c8fc5SChristopher J. PeBenito 1332e47c8fc5SChristopher J. PeBenito static ssize_t sel_read_perm(struct file *file, char __user *buf, 1333e47c8fc5SChristopher J. PeBenito size_t count, loff_t *ppos) 1334e47c8fc5SChristopher J. PeBenito { 1335e47c8fc5SChristopher J. PeBenito ssize_t rc, len; 1336e47c8fc5SChristopher J. PeBenito char *page; 1337e47c8fc5SChristopher J. PeBenito unsigned long ino = file->f_path.dentry->d_inode->i_ino; 1338e47c8fc5SChristopher J. PeBenito 1339e47c8fc5SChristopher J. PeBenito page = (char *)__get_free_page(GFP_KERNEL); 1340e47c8fc5SChristopher J. PeBenito if (!page) { 1341e47c8fc5SChristopher J. PeBenito rc = -ENOMEM; 1342e47c8fc5SChristopher J. PeBenito goto out; 1343e47c8fc5SChristopher J. PeBenito } 1344e47c8fc5SChristopher J. PeBenito 1345e47c8fc5SChristopher J. PeBenito len = snprintf(page, PAGE_SIZE, "%d", sel_ino_to_perm(ino)); 1346e47c8fc5SChristopher J. PeBenito rc = simple_read_from_buffer(buf, count, ppos, page, len); 1347e47c8fc5SChristopher J. PeBenito free_page((unsigned long)page); 1348e47c8fc5SChristopher J. PeBenito out: 1349e47c8fc5SChristopher J. PeBenito return rc; 1350e47c8fc5SChristopher J. PeBenito } 1351e47c8fc5SChristopher J. PeBenito 1352e47c8fc5SChristopher J. PeBenito static const struct file_operations sel_perm_ops = { 1353e47c8fc5SChristopher J. PeBenito .read = sel_read_perm, 1354e47c8fc5SChristopher J. PeBenito }; 1355e47c8fc5SChristopher J. PeBenito 13563bb56b25SPaul Moore static ssize_t sel_read_policycap(struct file *file, char __user *buf, 13573bb56b25SPaul Moore size_t count, loff_t *ppos) 13583bb56b25SPaul Moore { 13593bb56b25SPaul Moore int value; 13603bb56b25SPaul Moore char tmpbuf[TMPBUFLEN]; 13613bb56b25SPaul Moore ssize_t length; 13623bb56b25SPaul Moore unsigned long i_ino = file->f_path.dentry->d_inode->i_ino; 13633bb56b25SPaul Moore 13643bb56b25SPaul Moore value = security_policycap_supported(i_ino & SEL_INO_MASK); 13653bb56b25SPaul Moore length = scnprintf(tmpbuf, TMPBUFLEN, "%d", value); 13663bb56b25SPaul Moore 13673bb56b25SPaul Moore return simple_read_from_buffer(buf, count, ppos, tmpbuf, length); 13683bb56b25SPaul Moore } 13693bb56b25SPaul Moore 13703bb56b25SPaul Moore static const struct file_operations sel_policycap_ops = { 13713bb56b25SPaul Moore .read = sel_read_policycap, 13723bb56b25SPaul Moore }; 13733bb56b25SPaul Moore 1374e47c8fc5SChristopher J. PeBenito static int sel_make_perm_files(char *objclass, int classvalue, 1375e47c8fc5SChristopher J. PeBenito struct dentry *dir) 1376e47c8fc5SChristopher J. PeBenito { 1377e47c8fc5SChristopher J. PeBenito int i, rc = 0, nperms; 1378e47c8fc5SChristopher J. PeBenito char **perms; 1379e47c8fc5SChristopher J. PeBenito 1380e47c8fc5SChristopher J. PeBenito rc = security_get_permissions(objclass, &perms, &nperms); 1381e47c8fc5SChristopher J. PeBenito if (rc) 1382e47c8fc5SChristopher J. PeBenito goto out; 1383e47c8fc5SChristopher J. PeBenito 1384e47c8fc5SChristopher J. PeBenito for (i = 0; i < nperms; i++) { 1385e47c8fc5SChristopher J. PeBenito struct inode *inode; 1386e47c8fc5SChristopher J. PeBenito struct dentry *dentry; 1387e47c8fc5SChristopher J. PeBenito 1388e47c8fc5SChristopher J. PeBenito dentry = d_alloc_name(dir, perms[i]); 1389e47c8fc5SChristopher J. PeBenito if (!dentry) { 1390e47c8fc5SChristopher J. PeBenito rc = -ENOMEM; 1391e47c8fc5SChristopher J. PeBenito goto out1; 1392e47c8fc5SChristopher J. PeBenito } 1393e47c8fc5SChristopher J. PeBenito 1394e47c8fc5SChristopher J. PeBenito inode = sel_make_inode(dir->d_sb, S_IFREG|S_IRUGO); 1395e47c8fc5SChristopher J. PeBenito if (!inode) { 1396e47c8fc5SChristopher J. PeBenito rc = -ENOMEM; 1397e47c8fc5SChristopher J. PeBenito goto out1; 1398e47c8fc5SChristopher J. PeBenito } 1399e47c8fc5SChristopher J. PeBenito inode->i_fop = &sel_perm_ops; 1400e47c8fc5SChristopher J. PeBenito /* i+1 since perm values are 1-indexed */ 1401e47c8fc5SChristopher J. PeBenito inode->i_ino = sel_perm_to_ino(classvalue, i+1); 1402e47c8fc5SChristopher J. PeBenito d_add(dentry, inode); 1403e47c8fc5SChristopher J. PeBenito } 1404e47c8fc5SChristopher J. PeBenito 1405e47c8fc5SChristopher J. PeBenito out1: 1406e47c8fc5SChristopher J. PeBenito for (i = 0; i < nperms; i++) 1407e47c8fc5SChristopher J. PeBenito kfree(perms[i]); 1408e47c8fc5SChristopher J. PeBenito kfree(perms); 1409e47c8fc5SChristopher J. PeBenito out: 1410e47c8fc5SChristopher J. PeBenito return rc; 1411e47c8fc5SChristopher J. PeBenito } 1412e47c8fc5SChristopher J. PeBenito 1413e47c8fc5SChristopher J. PeBenito static int sel_make_class_dir_entries(char *classname, int index, 1414e47c8fc5SChristopher J. PeBenito struct dentry *dir) 1415e47c8fc5SChristopher J. PeBenito { 1416e47c8fc5SChristopher J. PeBenito struct dentry *dentry = NULL; 1417e47c8fc5SChristopher J. PeBenito struct inode *inode = NULL; 1418e47c8fc5SChristopher J. PeBenito int rc; 1419e47c8fc5SChristopher J. PeBenito 1420e47c8fc5SChristopher J. PeBenito dentry = d_alloc_name(dir, "index"); 1421e47c8fc5SChristopher J. PeBenito if (!dentry) { 1422e47c8fc5SChristopher J. PeBenito rc = -ENOMEM; 1423e47c8fc5SChristopher J. PeBenito goto out; 1424e47c8fc5SChristopher J. PeBenito } 1425e47c8fc5SChristopher J. PeBenito 1426e47c8fc5SChristopher J. PeBenito inode = sel_make_inode(dir->d_sb, S_IFREG|S_IRUGO); 1427e47c8fc5SChristopher J. PeBenito if (!inode) { 1428e47c8fc5SChristopher J. PeBenito rc = -ENOMEM; 1429e47c8fc5SChristopher J. PeBenito goto out; 1430e47c8fc5SChristopher J. PeBenito } 1431e47c8fc5SChristopher J. PeBenito 1432e47c8fc5SChristopher J. PeBenito inode->i_fop = &sel_class_ops; 1433e47c8fc5SChristopher J. PeBenito inode->i_ino = sel_class_to_ino(index); 1434e47c8fc5SChristopher J. PeBenito d_add(dentry, inode); 1435e47c8fc5SChristopher J. PeBenito 1436e47c8fc5SChristopher J. PeBenito dentry = d_alloc_name(dir, "perms"); 1437e47c8fc5SChristopher J. PeBenito if (!dentry) { 1438e47c8fc5SChristopher J. PeBenito rc = -ENOMEM; 1439e47c8fc5SChristopher J. PeBenito goto out; 1440e47c8fc5SChristopher J. PeBenito } 1441e47c8fc5SChristopher J. PeBenito 1442e47c8fc5SChristopher J. PeBenito rc = sel_make_dir(dir->d_inode, dentry, &last_class_ino); 1443e47c8fc5SChristopher J. PeBenito if (rc) 1444e47c8fc5SChristopher J. PeBenito goto out; 1445e47c8fc5SChristopher J. PeBenito 1446e47c8fc5SChristopher J. PeBenito rc = sel_make_perm_files(classname, index, dentry); 1447e47c8fc5SChristopher J. PeBenito 1448e47c8fc5SChristopher J. PeBenito out: 1449e47c8fc5SChristopher J. PeBenito return rc; 1450e47c8fc5SChristopher J. PeBenito } 1451e47c8fc5SChristopher J. PeBenito 1452e47c8fc5SChristopher J. PeBenito static void sel_remove_classes(void) 1453e47c8fc5SChristopher J. PeBenito { 1454e47c8fc5SChristopher J. PeBenito struct list_head *class_node; 1455e47c8fc5SChristopher J. PeBenito 1456e47c8fc5SChristopher J. PeBenito list_for_each(class_node, &class_dir->d_subdirs) { 1457e47c8fc5SChristopher J. PeBenito struct dentry *class_subdir = list_entry(class_node, 1458e47c8fc5SChristopher J. PeBenito struct dentry, d_u.d_child); 1459e47c8fc5SChristopher J. PeBenito struct list_head *class_subdir_node; 1460e47c8fc5SChristopher J. PeBenito 1461e47c8fc5SChristopher J. PeBenito list_for_each(class_subdir_node, &class_subdir->d_subdirs) { 1462e47c8fc5SChristopher J. PeBenito struct dentry *d = list_entry(class_subdir_node, 1463e47c8fc5SChristopher J. PeBenito struct dentry, d_u.d_child); 1464e47c8fc5SChristopher J. PeBenito 1465e47c8fc5SChristopher J. PeBenito if (d->d_inode) 1466e47c8fc5SChristopher J. PeBenito if (d->d_inode->i_mode & S_IFDIR) 1467e47c8fc5SChristopher J. PeBenito sel_remove_entries(d); 1468e47c8fc5SChristopher J. PeBenito } 1469e47c8fc5SChristopher J. PeBenito 1470e47c8fc5SChristopher J. PeBenito sel_remove_entries(class_subdir); 1471e47c8fc5SChristopher J. PeBenito } 1472e47c8fc5SChristopher J. PeBenito 1473e47c8fc5SChristopher J. PeBenito sel_remove_entries(class_dir); 1474e47c8fc5SChristopher J. PeBenito } 1475e47c8fc5SChristopher J. PeBenito 1476e47c8fc5SChristopher J. PeBenito static int sel_make_classes(void) 1477e47c8fc5SChristopher J. PeBenito { 1478e47c8fc5SChristopher J. PeBenito int rc = 0, nclasses, i; 1479e47c8fc5SChristopher J. PeBenito char **classes; 1480e47c8fc5SChristopher J. PeBenito 1481e47c8fc5SChristopher J. PeBenito /* delete any existing entries */ 1482e47c8fc5SChristopher J. PeBenito sel_remove_classes(); 1483e47c8fc5SChristopher J. PeBenito 1484e47c8fc5SChristopher J. PeBenito rc = security_get_classes(&classes, &nclasses); 1485e47c8fc5SChristopher J. PeBenito if (rc < 0) 1486e47c8fc5SChristopher J. PeBenito goto out; 1487e47c8fc5SChristopher J. PeBenito 1488e47c8fc5SChristopher J. PeBenito /* +2 since classes are 1-indexed */ 1489e47c8fc5SChristopher J. PeBenito last_class_ino = sel_class_to_ino(nclasses+2); 1490e47c8fc5SChristopher J. PeBenito 1491e47c8fc5SChristopher J. PeBenito for (i = 0; i < nclasses; i++) { 1492e47c8fc5SChristopher J. PeBenito struct dentry *class_name_dir; 1493e47c8fc5SChristopher J. PeBenito 1494e47c8fc5SChristopher J. PeBenito class_name_dir = d_alloc_name(class_dir, classes[i]); 1495e47c8fc5SChristopher J. PeBenito if (!class_name_dir) { 1496e47c8fc5SChristopher J. PeBenito rc = -ENOMEM; 1497e47c8fc5SChristopher J. PeBenito goto out1; 1498e47c8fc5SChristopher J. PeBenito } 1499e47c8fc5SChristopher J. PeBenito 1500e47c8fc5SChristopher J. PeBenito rc = sel_make_dir(class_dir->d_inode, class_name_dir, 1501e47c8fc5SChristopher J. PeBenito &last_class_ino); 1502e47c8fc5SChristopher J. PeBenito if (rc) 1503e47c8fc5SChristopher J. PeBenito goto out1; 1504e47c8fc5SChristopher J. PeBenito 1505e47c8fc5SChristopher J. PeBenito /* i+1 since class values are 1-indexed */ 1506e47c8fc5SChristopher J. PeBenito rc = sel_make_class_dir_entries(classes[i], i+1, 1507e47c8fc5SChristopher J. PeBenito class_name_dir); 1508e47c8fc5SChristopher J. PeBenito if (rc) 1509e47c8fc5SChristopher J. PeBenito goto out1; 1510e47c8fc5SChristopher J. PeBenito } 1511e47c8fc5SChristopher J. PeBenito 1512e47c8fc5SChristopher J. PeBenito out1: 1513e47c8fc5SChristopher J. PeBenito for (i = 0; i < nclasses; i++) 1514e47c8fc5SChristopher J. PeBenito kfree(classes[i]); 1515e47c8fc5SChristopher J. PeBenito kfree(classes); 1516e47c8fc5SChristopher J. PeBenito out: 1517e47c8fc5SChristopher J. PeBenito return rc; 1518e47c8fc5SChristopher J. PeBenito } 1519e47c8fc5SChristopher J. PeBenito 15203bb56b25SPaul Moore static int sel_make_policycap(void) 15213bb56b25SPaul Moore { 15223bb56b25SPaul Moore unsigned int iter; 15233bb56b25SPaul Moore struct dentry *dentry = NULL; 15243bb56b25SPaul Moore struct inode *inode = NULL; 15253bb56b25SPaul Moore 15263bb56b25SPaul Moore sel_remove_entries(policycap_dir); 15273bb56b25SPaul Moore 15283bb56b25SPaul Moore for (iter = 0; iter <= POLICYDB_CAPABILITY_MAX; iter++) { 15293bb56b25SPaul Moore if (iter < ARRAY_SIZE(policycap_names)) 15303bb56b25SPaul Moore dentry = d_alloc_name(policycap_dir, 15313bb56b25SPaul Moore policycap_names[iter]); 15323bb56b25SPaul Moore else 15333bb56b25SPaul Moore dentry = d_alloc_name(policycap_dir, "unknown"); 15343bb56b25SPaul Moore 15353bb56b25SPaul Moore if (dentry == NULL) 15363bb56b25SPaul Moore return -ENOMEM; 15373bb56b25SPaul Moore 15383bb56b25SPaul Moore inode = sel_make_inode(policycap_dir->d_sb, S_IFREG | S_IRUGO); 15393bb56b25SPaul Moore if (inode == NULL) 15403bb56b25SPaul Moore return -ENOMEM; 15413bb56b25SPaul Moore 15423bb56b25SPaul Moore inode->i_fop = &sel_policycap_ops; 15433bb56b25SPaul Moore inode->i_ino = iter | SEL_POLICYCAP_INO_OFFSET; 15443bb56b25SPaul Moore d_add(dentry, inode); 15453bb56b25SPaul Moore } 15463bb56b25SPaul Moore 15473bb56b25SPaul Moore return 0; 15483bb56b25SPaul Moore } 15493bb56b25SPaul Moore 15500dd4ae51SChristopher J. PeBenito static int sel_make_dir(struct inode *dir, struct dentry *dentry, 15510dd4ae51SChristopher J. PeBenito unsigned long *ino) 15521da177e4SLinus Torvalds { 15531da177e4SLinus Torvalds int ret = 0; 15541da177e4SLinus Torvalds struct inode *inode; 15551da177e4SLinus Torvalds 1556edb20fb5SJames Morris inode = sel_make_inode(dir->i_sb, S_IFDIR | S_IRUGO | S_IXUGO); 15571da177e4SLinus Torvalds if (!inode) { 15581da177e4SLinus Torvalds ret = -ENOMEM; 15591da177e4SLinus Torvalds goto out; 15601da177e4SLinus Torvalds } 15611da177e4SLinus Torvalds inode->i_op = &simple_dir_inode_operations; 15621da177e4SLinus Torvalds inode->i_fop = &simple_dir_operations; 15630dd4ae51SChristopher J. PeBenito inode->i_ino = ++(*ino); 156440e906f8SJames Morris /* directory inodes start off with i_nlink == 2 (for "." entry) */ 1565d8c76e6fSDave Hansen inc_nlink(inode); 15661da177e4SLinus Torvalds d_add(dentry, inode); 1567edb20fb5SJames Morris /* bump link count on parent directory, too */ 1568d8c76e6fSDave Hansen inc_nlink(dir); 15691da177e4SLinus Torvalds out: 15701da177e4SLinus Torvalds return ret; 15711da177e4SLinus Torvalds } 15721da177e4SLinus Torvalds 15731da177e4SLinus Torvalds static int sel_fill_super(struct super_block *sb, void *data, int silent) 15741da177e4SLinus Torvalds { 15751da177e4SLinus Torvalds int ret; 15761da177e4SLinus Torvalds struct dentry *dentry; 1577edb20fb5SJames Morris struct inode *inode, *root_inode; 15781da177e4SLinus Torvalds struct inode_security_struct *isec; 15791da177e4SLinus Torvalds 15801da177e4SLinus Torvalds static struct tree_descr selinux_files[] = { 15811da177e4SLinus Torvalds [SEL_LOAD] = {"load", &sel_load_ops, S_IRUSR|S_IWUSR}, 15821da177e4SLinus Torvalds [SEL_ENFORCE] = {"enforce", &sel_enforce_ops, S_IRUGO|S_IWUSR}, 1583ce9982d0SStephen Smalley [SEL_CONTEXT] = {"context", &transaction_ops, S_IRUGO|S_IWUGO}, 15841da177e4SLinus Torvalds [SEL_ACCESS] = {"access", &transaction_ops, S_IRUGO|S_IWUGO}, 15851da177e4SLinus Torvalds [SEL_CREATE] = {"create", &transaction_ops, S_IRUGO|S_IWUGO}, 15861da177e4SLinus Torvalds [SEL_RELABEL] = {"relabel", &transaction_ops, S_IRUGO|S_IWUGO}, 15871da177e4SLinus Torvalds [SEL_USER] = {"user", &transaction_ops, S_IRUGO|S_IWUGO}, 15881da177e4SLinus Torvalds [SEL_POLICYVERS] = {"policyvers", &sel_policyvers_ops, S_IRUGO}, 15891da177e4SLinus Torvalds [SEL_COMMIT_BOOLS] = {"commit_pending_bools", &sel_commit_bools_ops, S_IWUSR}, 15901da177e4SLinus Torvalds [SEL_MLS] = {"mls", &sel_mls_ops, S_IRUGO}, 15911da177e4SLinus Torvalds [SEL_DISABLE] = {"disable", &sel_disable_ops, S_IWUSR}, 15921da177e4SLinus Torvalds [SEL_MEMBER] = {"member", &transaction_ops, S_IRUGO|S_IWUGO}, 15931da177e4SLinus Torvalds [SEL_CHECKREQPROT] = {"checkreqprot", &sel_checkreqprot_ops, S_IRUGO|S_IWUSR}, 15943f12070eSEric Paris [SEL_REJECT_UNKNOWN] = {"reject_unknown", &sel_handle_unknown_ops, S_IRUGO}, 15953f12070eSEric Paris [SEL_DENY_UNKNOWN] = {"deny_unknown", &sel_handle_unknown_ops, S_IRUGO}, 15961da177e4SLinus Torvalds /* last one */ {""} 15971da177e4SLinus Torvalds }; 15981da177e4SLinus Torvalds ret = simple_fill_super(sb, SELINUX_MAGIC, selinux_files); 15991da177e4SLinus Torvalds if (ret) 1600161ce45aSJames Morris goto err; 16011da177e4SLinus Torvalds 1602edb20fb5SJames Morris root_inode = sb->s_root->d_inode; 1603edb20fb5SJames Morris 16041da177e4SLinus Torvalds dentry = d_alloc_name(sb->s_root, BOOL_DIR_NAME); 1605161ce45aSJames Morris if (!dentry) { 1606161ce45aSJames Morris ret = -ENOMEM; 1607161ce45aSJames Morris goto err; 1608161ce45aSJames Morris } 16091da177e4SLinus Torvalds 16100dd4ae51SChristopher J. PeBenito ret = sel_make_dir(root_inode, dentry, &sel_last_ino); 1611cde174a8SJames Morris if (ret) 1612161ce45aSJames Morris goto err; 1613cde174a8SJames Morris 16141da177e4SLinus Torvalds bool_dir = dentry; 16151da177e4SLinus Torvalds 16161da177e4SLinus Torvalds dentry = d_alloc_name(sb->s_root, NULL_FILE_NAME); 1617161ce45aSJames Morris if (!dentry) { 1618161ce45aSJames Morris ret = -ENOMEM; 1619161ce45aSJames Morris goto err; 1620161ce45aSJames Morris } 16211da177e4SLinus Torvalds 16221da177e4SLinus Torvalds inode = sel_make_inode(sb, S_IFCHR | S_IRUGO | S_IWUGO); 1623161ce45aSJames Morris if (!inode) { 1624161ce45aSJames Morris ret = -ENOMEM; 1625161ce45aSJames Morris goto err; 1626161ce45aSJames Morris } 16276174eafcSJames Carter inode->i_ino = ++sel_last_ino; 16281da177e4SLinus Torvalds isec = (struct inode_security_struct *)inode->i_security; 16291da177e4SLinus Torvalds isec->sid = SECINITSID_DEVNULL; 16301da177e4SLinus Torvalds isec->sclass = SECCLASS_CHR_FILE; 16311da177e4SLinus Torvalds isec->initialized = 1; 16321da177e4SLinus Torvalds 16331da177e4SLinus Torvalds init_special_inode(inode, S_IFCHR | S_IRUGO | S_IWUGO, MKDEV(MEM_MAJOR, 3)); 16341da177e4SLinus Torvalds d_add(dentry, inode); 16351da177e4SLinus Torvalds selinux_null = dentry; 16361da177e4SLinus Torvalds 16371da177e4SLinus Torvalds dentry = d_alloc_name(sb->s_root, "avc"); 1638161ce45aSJames Morris if (!dentry) { 1639161ce45aSJames Morris ret = -ENOMEM; 1640161ce45aSJames Morris goto err; 1641161ce45aSJames Morris } 16421da177e4SLinus Torvalds 16430dd4ae51SChristopher J. PeBenito ret = sel_make_dir(root_inode, dentry, &sel_last_ino); 16441da177e4SLinus Torvalds if (ret) 1645161ce45aSJames Morris goto err; 16461da177e4SLinus Torvalds 16471da177e4SLinus Torvalds ret = sel_make_avc_files(dentry); 16481da177e4SLinus Torvalds if (ret) 1649161ce45aSJames Morris goto err; 1650f0ee2e46SJames Carter 1651f0ee2e46SJames Carter dentry = d_alloc_name(sb->s_root, "initial_contexts"); 1652f0ee2e46SJames Carter if (!dentry) { 1653f0ee2e46SJames Carter ret = -ENOMEM; 1654f0ee2e46SJames Carter goto err; 1655f0ee2e46SJames Carter } 1656f0ee2e46SJames Carter 16570dd4ae51SChristopher J. PeBenito ret = sel_make_dir(root_inode, dentry, &sel_last_ino); 1658f0ee2e46SJames Carter if (ret) 1659f0ee2e46SJames Carter goto err; 1660f0ee2e46SJames Carter 1661f0ee2e46SJames Carter ret = sel_make_initcon_files(dentry); 1662f0ee2e46SJames Carter if (ret) 1663f0ee2e46SJames Carter goto err; 1664f0ee2e46SJames Carter 1665e47c8fc5SChristopher J. PeBenito dentry = d_alloc_name(sb->s_root, "class"); 1666e47c8fc5SChristopher J. PeBenito if (!dentry) { 1667e47c8fc5SChristopher J. PeBenito ret = -ENOMEM; 1668e47c8fc5SChristopher J. PeBenito goto err; 1669e47c8fc5SChristopher J. PeBenito } 1670e47c8fc5SChristopher J. PeBenito 1671e47c8fc5SChristopher J. PeBenito ret = sel_make_dir(root_inode, dentry, &sel_last_ino); 1672e47c8fc5SChristopher J. PeBenito if (ret) 1673e47c8fc5SChristopher J. PeBenito goto err; 1674e47c8fc5SChristopher J. PeBenito 1675e47c8fc5SChristopher J. PeBenito class_dir = dentry; 1676e47c8fc5SChristopher J. PeBenito 16773bb56b25SPaul Moore dentry = d_alloc_name(sb->s_root, "policy_capabilities"); 16783bb56b25SPaul Moore if (!dentry) { 16793bb56b25SPaul Moore ret = -ENOMEM; 16803bb56b25SPaul Moore goto err; 16813bb56b25SPaul Moore } 16823bb56b25SPaul Moore 16833bb56b25SPaul Moore ret = sel_make_dir(root_inode, dentry, &sel_last_ino); 16843bb56b25SPaul Moore if (ret) 16853bb56b25SPaul Moore goto err; 16863bb56b25SPaul Moore 16873bb56b25SPaul Moore policycap_dir = dentry; 16883bb56b25SPaul Moore 16891da177e4SLinus Torvalds out: 1690161ce45aSJames Morris return ret; 1691161ce45aSJames Morris err: 1692744ba35eSEric Paris printk(KERN_ERR "SELinux: %s: failed while creating inodes\n", 1693744ba35eSEric Paris __func__); 1694161ce45aSJames Morris goto out; 16951da177e4SLinus Torvalds } 16961da177e4SLinus Torvalds 1697454e2398SDavid Howells static int sel_get_sb(struct file_system_type *fs_type, 1698454e2398SDavid Howells int flags, const char *dev_name, void *data, 1699454e2398SDavid Howells struct vfsmount *mnt) 17001da177e4SLinus Torvalds { 1701454e2398SDavid Howells return get_sb_single(fs_type, flags, data, sel_fill_super, mnt); 17021da177e4SLinus Torvalds } 17031da177e4SLinus Torvalds 17041da177e4SLinus Torvalds static struct file_system_type sel_fs_type = { 17051da177e4SLinus Torvalds .name = "selinuxfs", 17061da177e4SLinus Torvalds .get_sb = sel_get_sb, 17071da177e4SLinus Torvalds .kill_sb = kill_litter_super, 17081da177e4SLinus Torvalds }; 17091da177e4SLinus Torvalds 17101da177e4SLinus Torvalds struct vfsmount *selinuxfs_mount; 17111da177e4SLinus Torvalds 17121da177e4SLinus Torvalds static int __init init_sel_fs(void) 17131da177e4SLinus Torvalds { 17141da177e4SLinus Torvalds int err; 17151da177e4SLinus Torvalds 17161da177e4SLinus Torvalds if (!selinux_enabled) 17171da177e4SLinus Torvalds return 0; 17181da177e4SLinus Torvalds err = register_filesystem(&sel_fs_type); 17191da177e4SLinus Torvalds if (!err) { 17201da177e4SLinus Torvalds selinuxfs_mount = kern_mount(&sel_fs_type); 17211da177e4SLinus Torvalds if (IS_ERR(selinuxfs_mount)) { 17221da177e4SLinus Torvalds printk(KERN_ERR "selinuxfs: could not mount!\n"); 17231da177e4SLinus Torvalds err = PTR_ERR(selinuxfs_mount); 17241da177e4SLinus Torvalds selinuxfs_mount = NULL; 17251da177e4SLinus Torvalds } 17261da177e4SLinus Torvalds } 17271da177e4SLinus Torvalds return err; 17281da177e4SLinus Torvalds } 17291da177e4SLinus Torvalds 17301da177e4SLinus Torvalds __initcall(init_sel_fs); 17311da177e4SLinus Torvalds 17321da177e4SLinus Torvalds #ifdef CONFIG_SECURITY_SELINUX_DISABLE 17331da177e4SLinus Torvalds void exit_sel_fs(void) 17341da177e4SLinus Torvalds { 17351da177e4SLinus Torvalds unregister_filesystem(&sel_fs_type); 17361da177e4SLinus Torvalds } 17371da177e4SLinus Torvalds #endif 1738