11da177e4SLinus Torvalds /* Updated: Karl MacMillan <kmacmillan@tresys.com> 21da177e4SLinus Torvalds * 31da177e4SLinus Torvalds * Added conditional policy language extensions 41da177e4SLinus Torvalds * 51da177e4SLinus Torvalds * Copyright (C) 2003 - 2004 Tresys Technology, LLC 61da177e4SLinus Torvalds * Copyright (C) 2004 Red Hat, Inc., James Morris <jmorris@redhat.com> 71da177e4SLinus Torvalds * This program is free software; you can redistribute it and/or modify 81da177e4SLinus Torvalds * it under the terms of the GNU General Public License as published by 91da177e4SLinus Torvalds * the Free Software Foundation, version 2. 101da177e4SLinus Torvalds */ 111da177e4SLinus Torvalds 121da177e4SLinus Torvalds #include <linux/config.h> 131da177e4SLinus Torvalds #include <linux/kernel.h> 141da177e4SLinus Torvalds #include <linux/pagemap.h> 151da177e4SLinus Torvalds #include <linux/slab.h> 161da177e4SLinus Torvalds #include <linux/vmalloc.h> 171da177e4SLinus Torvalds #include <linux/fs.h> 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> 241da177e4SLinus Torvalds #include <asm/uaccess.h> 251da177e4SLinus Torvalds #include <asm/semaphore.h> 261da177e4SLinus Torvalds 271da177e4SLinus Torvalds /* selinuxfs pseudo filesystem for exporting the security policy API. 281da177e4SLinus Torvalds Based on the proc code and the fs/nfsd/nfsctl.c code. */ 291da177e4SLinus Torvalds 301da177e4SLinus Torvalds #include "flask.h" 311da177e4SLinus Torvalds #include "avc.h" 321da177e4SLinus Torvalds #include "avc_ss.h" 331da177e4SLinus Torvalds #include "security.h" 341da177e4SLinus Torvalds #include "objsec.h" 351da177e4SLinus Torvalds #include "conditional.h" 361da177e4SLinus Torvalds 371da177e4SLinus Torvalds unsigned int selinux_checkreqprot = CONFIG_SECURITY_SELINUX_CHECKREQPROT_VALUE; 381da177e4SLinus Torvalds 391da177e4SLinus Torvalds static int __init checkreqprot_setup(char *str) 401da177e4SLinus Torvalds { 411da177e4SLinus Torvalds selinux_checkreqprot = simple_strtoul(str,NULL,0) ? 1 : 0; 421da177e4SLinus Torvalds return 1; 431da177e4SLinus Torvalds } 441da177e4SLinus Torvalds __setup("checkreqprot=", checkreqprot_setup); 451da177e4SLinus Torvalds 461da177e4SLinus Torvalds 471da177e4SLinus Torvalds static DECLARE_MUTEX(sel_sem); 481da177e4SLinus Torvalds 491da177e4SLinus Torvalds /* global data for booleans */ 501da177e4SLinus Torvalds static struct dentry *bool_dir = NULL; 511da177e4SLinus Torvalds static int bool_num = 0; 521da177e4SLinus Torvalds static int *bool_pending_values = NULL; 531da177e4SLinus Torvalds 541da177e4SLinus Torvalds extern void selnl_notify_setenforce(int val); 551da177e4SLinus Torvalds 561da177e4SLinus Torvalds /* Check whether a task is allowed to use a security operation. */ 571da177e4SLinus Torvalds static int task_has_security(struct task_struct *tsk, 581da177e4SLinus Torvalds u32 perms) 591da177e4SLinus Torvalds { 601da177e4SLinus Torvalds struct task_security_struct *tsec; 611da177e4SLinus Torvalds 621da177e4SLinus Torvalds tsec = tsk->security; 631da177e4SLinus Torvalds if (!tsec) 641da177e4SLinus Torvalds return -EACCES; 651da177e4SLinus Torvalds 661da177e4SLinus Torvalds return avc_has_perm(tsec->sid, SECINITSID_SECURITY, 671da177e4SLinus Torvalds SECCLASS_SECURITY, perms, NULL); 681da177e4SLinus Torvalds } 691da177e4SLinus Torvalds 701da177e4SLinus Torvalds enum sel_inos { 711da177e4SLinus Torvalds SEL_ROOT_INO = 2, 721da177e4SLinus Torvalds SEL_LOAD, /* load policy */ 731da177e4SLinus Torvalds SEL_ENFORCE, /* get or set enforcing status */ 741da177e4SLinus Torvalds SEL_CONTEXT, /* validate context */ 751da177e4SLinus Torvalds SEL_ACCESS, /* compute access decision */ 761da177e4SLinus Torvalds SEL_CREATE, /* compute create labeling decision */ 771da177e4SLinus Torvalds SEL_RELABEL, /* compute relabeling decision */ 781da177e4SLinus Torvalds SEL_USER, /* compute reachable user contexts */ 791da177e4SLinus Torvalds SEL_POLICYVERS, /* return policy version for this kernel */ 801da177e4SLinus Torvalds SEL_COMMIT_BOOLS, /* commit new boolean values */ 811da177e4SLinus Torvalds SEL_MLS, /* return if MLS policy is enabled */ 821da177e4SLinus Torvalds SEL_DISABLE, /* disable SELinux until next reboot */ 831da177e4SLinus Torvalds SEL_AVC, /* AVC management directory */ 841da177e4SLinus Torvalds SEL_MEMBER, /* compute polyinstantiation membership decision */ 851da177e4SLinus Torvalds SEL_CHECKREQPROT, /* check requested protection, not kernel-applied one */ 861da177e4SLinus Torvalds }; 871da177e4SLinus Torvalds 881da177e4SLinus Torvalds #define TMPBUFLEN 12 891da177e4SLinus Torvalds static ssize_t sel_read_enforce(struct file *filp, char __user *buf, 901da177e4SLinus Torvalds size_t count, loff_t *ppos) 911da177e4SLinus Torvalds { 921da177e4SLinus Torvalds char tmpbuf[TMPBUFLEN]; 931da177e4SLinus Torvalds ssize_t length; 941da177e4SLinus Torvalds 951da177e4SLinus Torvalds length = scnprintf(tmpbuf, TMPBUFLEN, "%d", selinux_enforcing); 961da177e4SLinus Torvalds return simple_read_from_buffer(buf, count, ppos, tmpbuf, length); 971da177e4SLinus Torvalds } 981da177e4SLinus Torvalds 991da177e4SLinus Torvalds #ifdef CONFIG_SECURITY_SELINUX_DEVELOP 1001da177e4SLinus Torvalds static ssize_t sel_write_enforce(struct file * file, const char __user * buf, 1011da177e4SLinus Torvalds size_t count, loff_t *ppos) 1021da177e4SLinus Torvalds 1031da177e4SLinus Torvalds { 1041da177e4SLinus Torvalds char *page; 1051da177e4SLinus Torvalds ssize_t length; 1061da177e4SLinus Torvalds int new_value; 1071da177e4SLinus Torvalds 108bfd51626SDavi Arnaut if (count >= PAGE_SIZE) 1091da177e4SLinus Torvalds return -ENOMEM; 1101da177e4SLinus Torvalds if (*ppos != 0) { 1111da177e4SLinus Torvalds /* No partial writes. */ 1121da177e4SLinus Torvalds return -EINVAL; 1131da177e4SLinus Torvalds } 1141da177e4SLinus Torvalds page = (char*)get_zeroed_page(GFP_KERNEL); 1151da177e4SLinus Torvalds if (!page) 1161da177e4SLinus Torvalds return -ENOMEM; 1171da177e4SLinus Torvalds length = -EFAULT; 1181da177e4SLinus Torvalds if (copy_from_user(page, buf, count)) 1191da177e4SLinus Torvalds goto out; 1201da177e4SLinus Torvalds 1211da177e4SLinus Torvalds length = -EINVAL; 1221da177e4SLinus Torvalds if (sscanf(page, "%d", &new_value) != 1) 1231da177e4SLinus Torvalds goto out; 1241da177e4SLinus Torvalds 1251da177e4SLinus Torvalds if (new_value != selinux_enforcing) { 1261da177e4SLinus Torvalds length = task_has_security(current, SECURITY__SETENFORCE); 1271da177e4SLinus Torvalds if (length) 1281da177e4SLinus Torvalds goto out; 1291da177e4SLinus Torvalds selinux_enforcing = new_value; 1301da177e4SLinus Torvalds if (selinux_enforcing) 1311da177e4SLinus Torvalds avc_ss_reset(0); 1321da177e4SLinus Torvalds selnl_notify_setenforce(selinux_enforcing); 1331da177e4SLinus Torvalds } 1341da177e4SLinus Torvalds length = count; 1351da177e4SLinus Torvalds out: 1361da177e4SLinus Torvalds free_page((unsigned long) page); 1371da177e4SLinus Torvalds return length; 1381da177e4SLinus Torvalds } 1391da177e4SLinus Torvalds #else 1401da177e4SLinus Torvalds #define sel_write_enforce NULL 1411da177e4SLinus Torvalds #endif 1421da177e4SLinus Torvalds 1431da177e4SLinus Torvalds static struct file_operations sel_enforce_ops = { 1441da177e4SLinus Torvalds .read = sel_read_enforce, 1451da177e4SLinus Torvalds .write = sel_write_enforce, 1461da177e4SLinus Torvalds }; 1471da177e4SLinus Torvalds 1481da177e4SLinus Torvalds #ifdef CONFIG_SECURITY_SELINUX_DISABLE 1491da177e4SLinus Torvalds static ssize_t sel_write_disable(struct file * file, const char __user * buf, 1501da177e4SLinus Torvalds size_t count, loff_t *ppos) 1511da177e4SLinus Torvalds 1521da177e4SLinus Torvalds { 1531da177e4SLinus Torvalds char *page; 1541da177e4SLinus Torvalds ssize_t length; 1551da177e4SLinus Torvalds int new_value; 1561da177e4SLinus Torvalds extern int selinux_disable(void); 1571da177e4SLinus Torvalds 158bfd51626SDavi Arnaut if (count >= PAGE_SIZE) 1591da177e4SLinus Torvalds return -ENOMEM; 1601da177e4SLinus Torvalds if (*ppos != 0) { 1611da177e4SLinus Torvalds /* No partial writes. */ 1621da177e4SLinus Torvalds return -EINVAL; 1631da177e4SLinus Torvalds } 1641da177e4SLinus Torvalds page = (char*)get_zeroed_page(GFP_KERNEL); 1651da177e4SLinus Torvalds if (!page) 1661da177e4SLinus Torvalds return -ENOMEM; 1671da177e4SLinus Torvalds length = -EFAULT; 1681da177e4SLinus Torvalds if (copy_from_user(page, buf, count)) 1691da177e4SLinus Torvalds goto out; 1701da177e4SLinus Torvalds 1711da177e4SLinus Torvalds length = -EINVAL; 1721da177e4SLinus Torvalds if (sscanf(page, "%d", &new_value) != 1) 1731da177e4SLinus Torvalds goto out; 1741da177e4SLinus Torvalds 1751da177e4SLinus Torvalds if (new_value) { 1761da177e4SLinus Torvalds length = selinux_disable(); 1771da177e4SLinus Torvalds if (length < 0) 1781da177e4SLinus Torvalds goto out; 1791da177e4SLinus Torvalds } 1801da177e4SLinus Torvalds 1811da177e4SLinus Torvalds length = count; 1821da177e4SLinus Torvalds out: 1831da177e4SLinus Torvalds free_page((unsigned long) page); 1841da177e4SLinus Torvalds return length; 1851da177e4SLinus Torvalds } 1861da177e4SLinus Torvalds #else 1871da177e4SLinus Torvalds #define sel_write_disable NULL 1881da177e4SLinus Torvalds #endif 1891da177e4SLinus Torvalds 1901da177e4SLinus Torvalds static struct file_operations sel_disable_ops = { 1911da177e4SLinus Torvalds .write = sel_write_disable, 1921da177e4SLinus Torvalds }; 1931da177e4SLinus Torvalds 1941da177e4SLinus Torvalds static ssize_t sel_read_policyvers(struct file *filp, char __user *buf, 1951da177e4SLinus Torvalds size_t count, loff_t *ppos) 1961da177e4SLinus Torvalds { 1971da177e4SLinus Torvalds char tmpbuf[TMPBUFLEN]; 1981da177e4SLinus Torvalds ssize_t length; 1991da177e4SLinus Torvalds 2001da177e4SLinus Torvalds length = scnprintf(tmpbuf, TMPBUFLEN, "%u", POLICYDB_VERSION_MAX); 2011da177e4SLinus Torvalds return simple_read_from_buffer(buf, count, ppos, tmpbuf, length); 2021da177e4SLinus Torvalds } 2031da177e4SLinus Torvalds 2041da177e4SLinus Torvalds static struct file_operations sel_policyvers_ops = { 2051da177e4SLinus Torvalds .read = sel_read_policyvers, 2061da177e4SLinus Torvalds }; 2071da177e4SLinus Torvalds 2081da177e4SLinus Torvalds /* declaration for sel_write_load */ 2091da177e4SLinus Torvalds static int sel_make_bools(void); 2101da177e4SLinus Torvalds 2111da177e4SLinus Torvalds static ssize_t sel_read_mls(struct file *filp, char __user *buf, 2121da177e4SLinus Torvalds size_t count, loff_t *ppos) 2131da177e4SLinus Torvalds { 2141da177e4SLinus Torvalds char tmpbuf[TMPBUFLEN]; 2151da177e4SLinus Torvalds ssize_t length; 2161da177e4SLinus Torvalds 2171da177e4SLinus Torvalds length = scnprintf(tmpbuf, TMPBUFLEN, "%d", selinux_mls_enabled); 2181da177e4SLinus Torvalds return simple_read_from_buffer(buf, count, ppos, tmpbuf, length); 2191da177e4SLinus Torvalds } 2201da177e4SLinus Torvalds 2211da177e4SLinus Torvalds static struct file_operations sel_mls_ops = { 2221da177e4SLinus Torvalds .read = sel_read_mls, 2231da177e4SLinus Torvalds }; 2241da177e4SLinus Torvalds 2251da177e4SLinus Torvalds static ssize_t sel_write_load(struct file * file, const char __user * buf, 2261da177e4SLinus Torvalds size_t count, loff_t *ppos) 2271da177e4SLinus Torvalds 2281da177e4SLinus Torvalds { 2291da177e4SLinus Torvalds int ret; 2301da177e4SLinus Torvalds ssize_t length; 2311da177e4SLinus Torvalds void *data = NULL; 2321da177e4SLinus Torvalds 2331da177e4SLinus Torvalds down(&sel_sem); 2341da177e4SLinus Torvalds 2351da177e4SLinus Torvalds length = task_has_security(current, SECURITY__LOAD_POLICY); 2361da177e4SLinus Torvalds if (length) 2371da177e4SLinus Torvalds goto out; 2381da177e4SLinus Torvalds 2391da177e4SLinus Torvalds if (*ppos != 0) { 2401da177e4SLinus Torvalds /* No partial writes. */ 2411da177e4SLinus Torvalds length = -EINVAL; 2421da177e4SLinus Torvalds goto out; 2431da177e4SLinus Torvalds } 2441da177e4SLinus Torvalds 245bfd51626SDavi Arnaut if ((count > 64 * 1024 * 1024) 2461da177e4SLinus Torvalds || (data = vmalloc(count)) == NULL) { 2471da177e4SLinus Torvalds length = -ENOMEM; 2481da177e4SLinus Torvalds goto out; 2491da177e4SLinus Torvalds } 2501da177e4SLinus Torvalds 2511da177e4SLinus Torvalds length = -EFAULT; 2521da177e4SLinus Torvalds if (copy_from_user(data, buf, count) != 0) 2531da177e4SLinus Torvalds goto out; 2541da177e4SLinus Torvalds 2551da177e4SLinus Torvalds length = security_load_policy(data, count); 2561da177e4SLinus Torvalds if (length) 2571da177e4SLinus Torvalds goto out; 2581da177e4SLinus Torvalds 2591da177e4SLinus Torvalds ret = sel_make_bools(); 2601da177e4SLinus Torvalds if (ret) 2611da177e4SLinus Torvalds length = ret; 2621da177e4SLinus Torvalds else 2631da177e4SLinus Torvalds length = count; 2641da177e4SLinus Torvalds out: 2651da177e4SLinus Torvalds up(&sel_sem); 2661da177e4SLinus Torvalds vfree(data); 2671da177e4SLinus Torvalds return length; 2681da177e4SLinus Torvalds } 2691da177e4SLinus Torvalds 2701da177e4SLinus Torvalds static struct file_operations sel_load_ops = { 2711da177e4SLinus Torvalds .write = sel_write_load, 2721da177e4SLinus Torvalds }; 2731da177e4SLinus Torvalds 2741da177e4SLinus Torvalds 2751da177e4SLinus Torvalds static ssize_t sel_write_context(struct file * file, const char __user * buf, 2761da177e4SLinus Torvalds size_t count, loff_t *ppos) 2771da177e4SLinus Torvalds 2781da177e4SLinus Torvalds { 2791da177e4SLinus Torvalds char *page; 2801da177e4SLinus Torvalds u32 sid; 2811da177e4SLinus Torvalds ssize_t length; 2821da177e4SLinus Torvalds 2831da177e4SLinus Torvalds length = task_has_security(current, SECURITY__CHECK_CONTEXT); 2841da177e4SLinus Torvalds if (length) 2851da177e4SLinus Torvalds return length; 2861da177e4SLinus Torvalds 287bfd51626SDavi Arnaut if (count >= PAGE_SIZE) 2881da177e4SLinus Torvalds return -ENOMEM; 2891da177e4SLinus Torvalds if (*ppos != 0) { 2901da177e4SLinus Torvalds /* No partial writes. */ 2911da177e4SLinus Torvalds return -EINVAL; 2921da177e4SLinus Torvalds } 2931da177e4SLinus Torvalds page = (char*)get_zeroed_page(GFP_KERNEL); 2941da177e4SLinus Torvalds if (!page) 2951da177e4SLinus Torvalds return -ENOMEM; 2961da177e4SLinus Torvalds length = -EFAULT; 2971da177e4SLinus Torvalds if (copy_from_user(page, buf, count)) 2981da177e4SLinus Torvalds goto out; 2991da177e4SLinus Torvalds 3001da177e4SLinus Torvalds length = security_context_to_sid(page, count, &sid); 3011da177e4SLinus Torvalds if (length < 0) 3021da177e4SLinus Torvalds goto out; 3031da177e4SLinus Torvalds 3041da177e4SLinus Torvalds length = count; 3051da177e4SLinus Torvalds out: 3061da177e4SLinus Torvalds free_page((unsigned long) page); 3071da177e4SLinus Torvalds return length; 3081da177e4SLinus Torvalds } 3091da177e4SLinus Torvalds 3101da177e4SLinus Torvalds static struct file_operations sel_context_ops = { 3111da177e4SLinus Torvalds .write = sel_write_context, 3121da177e4SLinus Torvalds }; 3131da177e4SLinus Torvalds 3141da177e4SLinus Torvalds static ssize_t sel_read_checkreqprot(struct file *filp, char __user *buf, 3151da177e4SLinus Torvalds size_t count, loff_t *ppos) 3161da177e4SLinus Torvalds { 3171da177e4SLinus Torvalds char tmpbuf[TMPBUFLEN]; 3181da177e4SLinus Torvalds ssize_t length; 3191da177e4SLinus Torvalds 3201da177e4SLinus Torvalds length = scnprintf(tmpbuf, TMPBUFLEN, "%u", selinux_checkreqprot); 3211da177e4SLinus Torvalds return simple_read_from_buffer(buf, count, ppos, tmpbuf, length); 3221da177e4SLinus Torvalds } 3231da177e4SLinus Torvalds 3241da177e4SLinus Torvalds static ssize_t sel_write_checkreqprot(struct file * file, const char __user * buf, 3251da177e4SLinus Torvalds size_t count, loff_t *ppos) 3261da177e4SLinus Torvalds { 3271da177e4SLinus Torvalds char *page; 3281da177e4SLinus Torvalds ssize_t length; 3291da177e4SLinus Torvalds unsigned int new_value; 3301da177e4SLinus Torvalds 3311da177e4SLinus Torvalds length = task_has_security(current, SECURITY__SETCHECKREQPROT); 3321da177e4SLinus Torvalds if (length) 3331da177e4SLinus Torvalds return length; 3341da177e4SLinus Torvalds 335bfd51626SDavi Arnaut if (count >= PAGE_SIZE) 3361da177e4SLinus Torvalds return -ENOMEM; 3371da177e4SLinus Torvalds if (*ppos != 0) { 3381da177e4SLinus Torvalds /* No partial writes. */ 3391da177e4SLinus Torvalds return -EINVAL; 3401da177e4SLinus Torvalds } 3411da177e4SLinus Torvalds page = (char*)get_zeroed_page(GFP_KERNEL); 3421da177e4SLinus Torvalds if (!page) 3431da177e4SLinus Torvalds return -ENOMEM; 3441da177e4SLinus Torvalds length = -EFAULT; 3451da177e4SLinus Torvalds if (copy_from_user(page, buf, count)) 3461da177e4SLinus Torvalds goto out; 3471da177e4SLinus Torvalds 3481da177e4SLinus Torvalds length = -EINVAL; 3491da177e4SLinus Torvalds if (sscanf(page, "%u", &new_value) != 1) 3501da177e4SLinus Torvalds goto out; 3511da177e4SLinus Torvalds 3521da177e4SLinus Torvalds selinux_checkreqprot = new_value ? 1 : 0; 3531da177e4SLinus Torvalds length = count; 3541da177e4SLinus Torvalds out: 3551da177e4SLinus Torvalds free_page((unsigned long) page); 3561da177e4SLinus Torvalds return length; 3571da177e4SLinus Torvalds } 3581da177e4SLinus Torvalds static struct file_operations sel_checkreqprot_ops = { 3591da177e4SLinus Torvalds .read = sel_read_checkreqprot, 3601da177e4SLinus Torvalds .write = sel_write_checkreqprot, 3611da177e4SLinus Torvalds }; 3621da177e4SLinus Torvalds 3631da177e4SLinus Torvalds /* 3641da177e4SLinus Torvalds * Remaining nodes use transaction based IO methods like nfsd/nfsctl.c 3651da177e4SLinus Torvalds */ 3661da177e4SLinus Torvalds static ssize_t sel_write_access(struct file * file, char *buf, size_t size); 3671da177e4SLinus Torvalds static ssize_t sel_write_create(struct file * file, char *buf, size_t size); 3681da177e4SLinus Torvalds static ssize_t sel_write_relabel(struct file * file, char *buf, size_t size); 3691da177e4SLinus Torvalds static ssize_t sel_write_user(struct file * file, char *buf, size_t size); 3701da177e4SLinus Torvalds static ssize_t sel_write_member(struct file * file, char *buf, size_t size); 3711da177e4SLinus Torvalds 3721da177e4SLinus Torvalds static ssize_t (*write_op[])(struct file *, char *, size_t) = { 3731da177e4SLinus Torvalds [SEL_ACCESS] = sel_write_access, 3741da177e4SLinus Torvalds [SEL_CREATE] = sel_write_create, 3751da177e4SLinus Torvalds [SEL_RELABEL] = sel_write_relabel, 3761da177e4SLinus Torvalds [SEL_USER] = sel_write_user, 3771da177e4SLinus Torvalds [SEL_MEMBER] = sel_write_member, 3781da177e4SLinus Torvalds }; 3791da177e4SLinus Torvalds 3801da177e4SLinus Torvalds static ssize_t selinux_transaction_write(struct file *file, const char __user *buf, size_t size, loff_t *pos) 3811da177e4SLinus Torvalds { 3821da177e4SLinus Torvalds ino_t ino = file->f_dentry->d_inode->i_ino; 3831da177e4SLinus Torvalds char *data; 3841da177e4SLinus Torvalds ssize_t rv; 3851da177e4SLinus Torvalds 3861da177e4SLinus Torvalds if (ino >= sizeof(write_op)/sizeof(write_op[0]) || !write_op[ino]) 3871da177e4SLinus Torvalds return -EINVAL; 3881da177e4SLinus Torvalds 3891da177e4SLinus Torvalds data = simple_transaction_get(file, buf, size); 3901da177e4SLinus Torvalds if (IS_ERR(data)) 3911da177e4SLinus Torvalds return PTR_ERR(data); 3921da177e4SLinus Torvalds 3931da177e4SLinus Torvalds rv = write_op[ino](file, data, size); 3941da177e4SLinus Torvalds if (rv>0) { 3951da177e4SLinus Torvalds simple_transaction_set(file, rv); 3961da177e4SLinus Torvalds rv = size; 3971da177e4SLinus Torvalds } 3981da177e4SLinus Torvalds return rv; 3991da177e4SLinus Torvalds } 4001da177e4SLinus Torvalds 4011da177e4SLinus Torvalds static struct file_operations transaction_ops = { 4021da177e4SLinus Torvalds .write = selinux_transaction_write, 4031da177e4SLinus Torvalds .read = simple_transaction_read, 4041da177e4SLinus Torvalds .release = simple_transaction_release, 4051da177e4SLinus Torvalds }; 4061da177e4SLinus Torvalds 4071da177e4SLinus Torvalds /* 4081da177e4SLinus Torvalds * payload - write methods 4091da177e4SLinus Torvalds * If the method has a response, the response should be put in buf, 4101da177e4SLinus Torvalds * and the length returned. Otherwise return 0 or and -error. 4111da177e4SLinus Torvalds */ 4121da177e4SLinus Torvalds 4131da177e4SLinus Torvalds static ssize_t sel_write_access(struct file * file, char *buf, size_t size) 4141da177e4SLinus Torvalds { 4151da177e4SLinus Torvalds char *scon, *tcon; 4161da177e4SLinus Torvalds u32 ssid, tsid; 4171da177e4SLinus Torvalds u16 tclass; 4181da177e4SLinus Torvalds u32 req; 4191da177e4SLinus Torvalds struct av_decision avd; 4201da177e4SLinus Torvalds ssize_t length; 4211da177e4SLinus Torvalds 4221da177e4SLinus Torvalds length = task_has_security(current, SECURITY__COMPUTE_AV); 4231da177e4SLinus Torvalds if (length) 4241da177e4SLinus Torvalds return length; 4251da177e4SLinus Torvalds 4261da177e4SLinus Torvalds length = -ENOMEM; 42789d155efSJames Morris scon = kzalloc(size+1, GFP_KERNEL); 4281da177e4SLinus Torvalds if (!scon) 4291da177e4SLinus Torvalds return length; 4301da177e4SLinus Torvalds 43189d155efSJames Morris tcon = kzalloc(size+1, GFP_KERNEL); 4321da177e4SLinus Torvalds if (!tcon) 4331da177e4SLinus Torvalds goto out; 4341da177e4SLinus Torvalds 4351da177e4SLinus Torvalds length = -EINVAL; 4361da177e4SLinus Torvalds if (sscanf(buf, "%s %s %hu %x", scon, tcon, &tclass, &req) != 4) 4371da177e4SLinus Torvalds goto out2; 4381da177e4SLinus Torvalds 4391da177e4SLinus Torvalds length = security_context_to_sid(scon, strlen(scon)+1, &ssid); 4401da177e4SLinus Torvalds if (length < 0) 4411da177e4SLinus Torvalds goto out2; 4421da177e4SLinus Torvalds length = security_context_to_sid(tcon, strlen(tcon)+1, &tsid); 4431da177e4SLinus Torvalds if (length < 0) 4441da177e4SLinus Torvalds goto out2; 4451da177e4SLinus Torvalds 4461da177e4SLinus Torvalds length = security_compute_av(ssid, tsid, tclass, req, &avd); 4471da177e4SLinus Torvalds if (length < 0) 4481da177e4SLinus Torvalds goto out2; 4491da177e4SLinus Torvalds 4501da177e4SLinus Torvalds length = scnprintf(buf, SIMPLE_TRANSACTION_LIMIT, 4511da177e4SLinus Torvalds "%x %x %x %x %u", 4521da177e4SLinus Torvalds avd.allowed, avd.decided, 4531da177e4SLinus Torvalds avd.auditallow, avd.auditdeny, 4541da177e4SLinus Torvalds avd.seqno); 4551da177e4SLinus Torvalds out2: 4561da177e4SLinus Torvalds kfree(tcon); 4571da177e4SLinus Torvalds out: 4581da177e4SLinus Torvalds kfree(scon); 4591da177e4SLinus Torvalds return length; 4601da177e4SLinus Torvalds } 4611da177e4SLinus Torvalds 4621da177e4SLinus Torvalds static ssize_t sel_write_create(struct file * file, char *buf, size_t size) 4631da177e4SLinus Torvalds { 4641da177e4SLinus Torvalds char *scon, *tcon; 4651da177e4SLinus Torvalds u32 ssid, tsid, newsid; 4661da177e4SLinus Torvalds u16 tclass; 4671da177e4SLinus Torvalds ssize_t length; 4681da177e4SLinus Torvalds char *newcon; 4691da177e4SLinus Torvalds u32 len; 4701da177e4SLinus Torvalds 4711da177e4SLinus Torvalds length = task_has_security(current, SECURITY__COMPUTE_CREATE); 4721da177e4SLinus Torvalds if (length) 4731da177e4SLinus Torvalds return length; 4741da177e4SLinus Torvalds 4751da177e4SLinus Torvalds length = -ENOMEM; 47689d155efSJames Morris scon = kzalloc(size+1, GFP_KERNEL); 4771da177e4SLinus Torvalds if (!scon) 4781da177e4SLinus Torvalds return length; 4791da177e4SLinus Torvalds 48089d155efSJames Morris tcon = kzalloc(size+1, GFP_KERNEL); 4811da177e4SLinus Torvalds if (!tcon) 4821da177e4SLinus Torvalds goto out; 4831da177e4SLinus Torvalds 4841da177e4SLinus Torvalds length = -EINVAL; 4851da177e4SLinus Torvalds if (sscanf(buf, "%s %s %hu", scon, tcon, &tclass) != 3) 4861da177e4SLinus Torvalds goto out2; 4871da177e4SLinus Torvalds 4881da177e4SLinus Torvalds length = security_context_to_sid(scon, strlen(scon)+1, &ssid); 4891da177e4SLinus Torvalds if (length < 0) 4901da177e4SLinus Torvalds goto out2; 4911da177e4SLinus Torvalds length = security_context_to_sid(tcon, strlen(tcon)+1, &tsid); 4921da177e4SLinus Torvalds if (length < 0) 4931da177e4SLinus Torvalds goto out2; 4941da177e4SLinus Torvalds 4951da177e4SLinus Torvalds length = security_transition_sid(ssid, tsid, tclass, &newsid); 4961da177e4SLinus Torvalds if (length < 0) 4971da177e4SLinus Torvalds goto out2; 4981da177e4SLinus Torvalds 4991da177e4SLinus Torvalds length = security_sid_to_context(newsid, &newcon, &len); 5001da177e4SLinus Torvalds if (length < 0) 5011da177e4SLinus Torvalds goto out2; 5021da177e4SLinus Torvalds 5031da177e4SLinus Torvalds if (len > SIMPLE_TRANSACTION_LIMIT) { 5041da177e4SLinus Torvalds printk(KERN_ERR "%s: context size (%u) exceeds payload " 5051da177e4SLinus Torvalds "max\n", __FUNCTION__, len); 5061da177e4SLinus Torvalds length = -ERANGE; 5071da177e4SLinus Torvalds goto out3; 5081da177e4SLinus Torvalds } 5091da177e4SLinus Torvalds 5101da177e4SLinus Torvalds memcpy(buf, newcon, len); 5111da177e4SLinus Torvalds length = len; 5121da177e4SLinus Torvalds out3: 5131da177e4SLinus Torvalds kfree(newcon); 5141da177e4SLinus Torvalds out2: 5151da177e4SLinus Torvalds kfree(tcon); 5161da177e4SLinus Torvalds out: 5171da177e4SLinus Torvalds kfree(scon); 5181da177e4SLinus Torvalds return length; 5191da177e4SLinus Torvalds } 5201da177e4SLinus Torvalds 5211da177e4SLinus Torvalds static ssize_t sel_write_relabel(struct file * file, char *buf, size_t size) 5221da177e4SLinus Torvalds { 5231da177e4SLinus Torvalds char *scon, *tcon; 5241da177e4SLinus Torvalds u32 ssid, tsid, newsid; 5251da177e4SLinus Torvalds u16 tclass; 5261da177e4SLinus Torvalds ssize_t length; 5271da177e4SLinus Torvalds char *newcon; 5281da177e4SLinus Torvalds u32 len; 5291da177e4SLinus Torvalds 5301da177e4SLinus Torvalds length = task_has_security(current, SECURITY__COMPUTE_RELABEL); 5311da177e4SLinus Torvalds if (length) 5321da177e4SLinus Torvalds return length; 5331da177e4SLinus Torvalds 5341da177e4SLinus Torvalds length = -ENOMEM; 53589d155efSJames Morris scon = kzalloc(size+1, GFP_KERNEL); 5361da177e4SLinus Torvalds if (!scon) 5371da177e4SLinus Torvalds return length; 5381da177e4SLinus Torvalds 53989d155efSJames Morris tcon = kzalloc(size+1, GFP_KERNEL); 5401da177e4SLinus Torvalds if (!tcon) 5411da177e4SLinus Torvalds goto out; 5421da177e4SLinus Torvalds 5431da177e4SLinus Torvalds length = -EINVAL; 5441da177e4SLinus Torvalds if (sscanf(buf, "%s %s %hu", scon, tcon, &tclass) != 3) 5451da177e4SLinus Torvalds goto out2; 5461da177e4SLinus Torvalds 5471da177e4SLinus Torvalds length = security_context_to_sid(scon, strlen(scon)+1, &ssid); 5481da177e4SLinus Torvalds if (length < 0) 5491da177e4SLinus Torvalds goto out2; 5501da177e4SLinus Torvalds length = security_context_to_sid(tcon, strlen(tcon)+1, &tsid); 5511da177e4SLinus Torvalds if (length < 0) 5521da177e4SLinus Torvalds goto out2; 5531da177e4SLinus Torvalds 5541da177e4SLinus Torvalds length = security_change_sid(ssid, tsid, tclass, &newsid); 5551da177e4SLinus Torvalds if (length < 0) 5561da177e4SLinus Torvalds goto out2; 5571da177e4SLinus Torvalds 5581da177e4SLinus Torvalds length = security_sid_to_context(newsid, &newcon, &len); 5591da177e4SLinus Torvalds if (length < 0) 5601da177e4SLinus Torvalds goto out2; 5611da177e4SLinus Torvalds 5621da177e4SLinus Torvalds if (len > SIMPLE_TRANSACTION_LIMIT) { 5631da177e4SLinus Torvalds length = -ERANGE; 5641da177e4SLinus Torvalds goto out3; 5651da177e4SLinus Torvalds } 5661da177e4SLinus Torvalds 5671da177e4SLinus Torvalds memcpy(buf, newcon, len); 5681da177e4SLinus Torvalds length = len; 5691da177e4SLinus Torvalds out3: 5701da177e4SLinus Torvalds kfree(newcon); 5711da177e4SLinus Torvalds out2: 5721da177e4SLinus Torvalds kfree(tcon); 5731da177e4SLinus Torvalds out: 5741da177e4SLinus Torvalds kfree(scon); 5751da177e4SLinus Torvalds return length; 5761da177e4SLinus Torvalds } 5771da177e4SLinus Torvalds 5781da177e4SLinus Torvalds static ssize_t sel_write_user(struct file * file, char *buf, size_t size) 5791da177e4SLinus Torvalds { 5801da177e4SLinus Torvalds char *con, *user, *ptr; 5811da177e4SLinus Torvalds u32 sid, *sids; 5821da177e4SLinus Torvalds ssize_t length; 5831da177e4SLinus Torvalds char *newcon; 5841da177e4SLinus Torvalds int i, rc; 5851da177e4SLinus Torvalds u32 len, nsids; 5861da177e4SLinus Torvalds 5871da177e4SLinus Torvalds length = task_has_security(current, SECURITY__COMPUTE_USER); 5881da177e4SLinus Torvalds if (length) 5891da177e4SLinus Torvalds return length; 5901da177e4SLinus Torvalds 5911da177e4SLinus Torvalds length = -ENOMEM; 59289d155efSJames Morris con = kzalloc(size+1, GFP_KERNEL); 5931da177e4SLinus Torvalds if (!con) 5941da177e4SLinus Torvalds return length; 5951da177e4SLinus Torvalds 59689d155efSJames Morris user = kzalloc(size+1, GFP_KERNEL); 5971da177e4SLinus Torvalds if (!user) 5981da177e4SLinus Torvalds goto out; 5991da177e4SLinus Torvalds 6001da177e4SLinus Torvalds length = -EINVAL; 6011da177e4SLinus Torvalds if (sscanf(buf, "%s %s", con, user) != 2) 6021da177e4SLinus Torvalds goto out2; 6031da177e4SLinus Torvalds 6041da177e4SLinus Torvalds length = security_context_to_sid(con, strlen(con)+1, &sid); 6051da177e4SLinus Torvalds if (length < 0) 6061da177e4SLinus Torvalds goto out2; 6071da177e4SLinus Torvalds 6081da177e4SLinus Torvalds length = security_get_user_sids(sid, user, &sids, &nsids); 6091da177e4SLinus Torvalds if (length < 0) 6101da177e4SLinus Torvalds goto out2; 6111da177e4SLinus Torvalds 6121da177e4SLinus Torvalds length = sprintf(buf, "%u", nsids) + 1; 6131da177e4SLinus Torvalds ptr = buf + length; 6141da177e4SLinus Torvalds for (i = 0; i < nsids; i++) { 6151da177e4SLinus Torvalds rc = security_sid_to_context(sids[i], &newcon, &len); 6161da177e4SLinus Torvalds if (rc) { 6171da177e4SLinus Torvalds length = rc; 6181da177e4SLinus Torvalds goto out3; 6191da177e4SLinus Torvalds } 6201da177e4SLinus Torvalds if ((length + len) >= SIMPLE_TRANSACTION_LIMIT) { 6211da177e4SLinus Torvalds kfree(newcon); 6221da177e4SLinus Torvalds length = -ERANGE; 6231da177e4SLinus Torvalds goto out3; 6241da177e4SLinus Torvalds } 6251da177e4SLinus Torvalds memcpy(ptr, newcon, len); 6261da177e4SLinus Torvalds kfree(newcon); 6271da177e4SLinus Torvalds ptr += len; 6281da177e4SLinus Torvalds length += len; 6291da177e4SLinus Torvalds } 6301da177e4SLinus Torvalds out3: 6311da177e4SLinus Torvalds kfree(sids); 6321da177e4SLinus Torvalds out2: 6331da177e4SLinus Torvalds kfree(user); 6341da177e4SLinus Torvalds out: 6351da177e4SLinus Torvalds kfree(con); 6361da177e4SLinus Torvalds return length; 6371da177e4SLinus Torvalds } 6381da177e4SLinus Torvalds 6391da177e4SLinus Torvalds static ssize_t sel_write_member(struct file * file, char *buf, size_t size) 6401da177e4SLinus Torvalds { 6411da177e4SLinus Torvalds char *scon, *tcon; 6421da177e4SLinus Torvalds u32 ssid, tsid, newsid; 6431da177e4SLinus Torvalds u16 tclass; 6441da177e4SLinus Torvalds ssize_t length; 6451da177e4SLinus Torvalds char *newcon; 6461da177e4SLinus Torvalds u32 len; 6471da177e4SLinus Torvalds 6481da177e4SLinus Torvalds length = task_has_security(current, SECURITY__COMPUTE_MEMBER); 6491da177e4SLinus Torvalds if (length) 6501da177e4SLinus Torvalds return length; 6511da177e4SLinus Torvalds 6521da177e4SLinus Torvalds length = -ENOMEM; 65389d155efSJames Morris scon = kzalloc(size+1, GFP_KERNEL); 6541da177e4SLinus Torvalds if (!scon) 6551da177e4SLinus Torvalds return length; 6561da177e4SLinus Torvalds 65789d155efSJames Morris tcon = kzalloc(size+1, GFP_KERNEL); 6581da177e4SLinus Torvalds if (!tcon) 6591da177e4SLinus Torvalds goto out; 6601da177e4SLinus Torvalds 6611da177e4SLinus Torvalds length = -EINVAL; 6621da177e4SLinus Torvalds if (sscanf(buf, "%s %s %hu", scon, tcon, &tclass) != 3) 6631da177e4SLinus Torvalds goto out2; 6641da177e4SLinus Torvalds 6651da177e4SLinus Torvalds length = security_context_to_sid(scon, strlen(scon)+1, &ssid); 6661da177e4SLinus Torvalds if (length < 0) 6671da177e4SLinus Torvalds goto out2; 6681da177e4SLinus Torvalds length = security_context_to_sid(tcon, strlen(tcon)+1, &tsid); 6691da177e4SLinus Torvalds if (length < 0) 6701da177e4SLinus Torvalds goto out2; 6711da177e4SLinus Torvalds 6721da177e4SLinus Torvalds length = security_member_sid(ssid, tsid, tclass, &newsid); 6731da177e4SLinus Torvalds if (length < 0) 6741da177e4SLinus Torvalds goto out2; 6751da177e4SLinus Torvalds 6761da177e4SLinus Torvalds length = security_sid_to_context(newsid, &newcon, &len); 6771da177e4SLinus Torvalds if (length < 0) 6781da177e4SLinus Torvalds goto out2; 6791da177e4SLinus Torvalds 6801da177e4SLinus Torvalds if (len > SIMPLE_TRANSACTION_LIMIT) { 6811da177e4SLinus Torvalds printk(KERN_ERR "%s: context size (%u) exceeds payload " 6821da177e4SLinus Torvalds "max\n", __FUNCTION__, len); 6831da177e4SLinus Torvalds length = -ERANGE; 6841da177e4SLinus Torvalds goto out3; 6851da177e4SLinus Torvalds } 6861da177e4SLinus Torvalds 6871da177e4SLinus Torvalds memcpy(buf, newcon, len); 6881da177e4SLinus Torvalds length = len; 6891da177e4SLinus Torvalds out3: 6901da177e4SLinus Torvalds kfree(newcon); 6911da177e4SLinus Torvalds out2: 6921da177e4SLinus Torvalds kfree(tcon); 6931da177e4SLinus Torvalds out: 6941da177e4SLinus Torvalds kfree(scon); 6951da177e4SLinus Torvalds return length; 6961da177e4SLinus Torvalds } 6971da177e4SLinus Torvalds 6981da177e4SLinus Torvalds static struct inode *sel_make_inode(struct super_block *sb, int mode) 6991da177e4SLinus Torvalds { 7001da177e4SLinus Torvalds struct inode *ret = new_inode(sb); 7011da177e4SLinus Torvalds 7021da177e4SLinus Torvalds if (ret) { 7031da177e4SLinus Torvalds ret->i_mode = mode; 7041da177e4SLinus Torvalds ret->i_uid = ret->i_gid = 0; 7051da177e4SLinus Torvalds ret->i_blksize = PAGE_CACHE_SIZE; 7061da177e4SLinus Torvalds ret->i_blocks = 0; 7071da177e4SLinus Torvalds ret->i_atime = ret->i_mtime = ret->i_ctime = CURRENT_TIME; 7081da177e4SLinus Torvalds } 7091da177e4SLinus Torvalds return ret; 7101da177e4SLinus Torvalds } 7111da177e4SLinus Torvalds 7121da177e4SLinus Torvalds #define BOOL_INO_OFFSET 30 7131da177e4SLinus Torvalds 7141da177e4SLinus Torvalds static ssize_t sel_read_bool(struct file *filep, char __user *buf, 7151da177e4SLinus Torvalds size_t count, loff_t *ppos) 7161da177e4SLinus Torvalds { 7171da177e4SLinus Torvalds char *page = NULL; 7181da177e4SLinus Torvalds ssize_t length; 7191da177e4SLinus Torvalds ssize_t end; 7201da177e4SLinus Torvalds ssize_t ret; 7211da177e4SLinus Torvalds int cur_enforcing; 7221da177e4SLinus Torvalds struct inode *inode; 7231da177e4SLinus Torvalds 7241da177e4SLinus Torvalds down(&sel_sem); 7251da177e4SLinus Torvalds 7261da177e4SLinus Torvalds ret = -EFAULT; 7271da177e4SLinus Torvalds 7281da177e4SLinus Torvalds /* check to see if this file has been deleted */ 7291da177e4SLinus Torvalds if (!filep->f_op) 7301da177e4SLinus Torvalds goto out; 7311da177e4SLinus Torvalds 732bfd51626SDavi Arnaut if (count > PAGE_SIZE) { 7331da177e4SLinus Torvalds ret = -EINVAL; 7341da177e4SLinus Torvalds goto out; 7351da177e4SLinus Torvalds } 7361da177e4SLinus Torvalds if (!(page = (char*)get_zeroed_page(GFP_KERNEL))) { 7371da177e4SLinus Torvalds ret = -ENOMEM; 7381da177e4SLinus Torvalds goto out; 7391da177e4SLinus Torvalds } 7401da177e4SLinus Torvalds 7411da177e4SLinus Torvalds inode = filep->f_dentry->d_inode; 7421da177e4SLinus Torvalds cur_enforcing = security_get_bool_value(inode->i_ino - BOOL_INO_OFFSET); 7431da177e4SLinus Torvalds if (cur_enforcing < 0) { 7441da177e4SLinus Torvalds ret = cur_enforcing; 7451da177e4SLinus Torvalds goto out; 7461da177e4SLinus Torvalds } 7471da177e4SLinus Torvalds 7481da177e4SLinus Torvalds length = scnprintf(page, PAGE_SIZE, "%d %d", cur_enforcing, 7491da177e4SLinus Torvalds bool_pending_values[inode->i_ino - BOOL_INO_OFFSET]); 7501da177e4SLinus Torvalds if (length < 0) { 7511da177e4SLinus Torvalds ret = length; 7521da177e4SLinus Torvalds goto out; 7531da177e4SLinus Torvalds } 7541da177e4SLinus Torvalds 7551da177e4SLinus Torvalds if (*ppos >= length) { 7561da177e4SLinus Torvalds ret = 0; 7571da177e4SLinus Torvalds goto out; 7581da177e4SLinus Torvalds } 7591da177e4SLinus Torvalds if (count + *ppos > length) 7601da177e4SLinus Torvalds count = length - *ppos; 7611da177e4SLinus Torvalds end = count + *ppos; 7621da177e4SLinus Torvalds if (copy_to_user(buf, (char *) page + *ppos, count)) { 7631da177e4SLinus Torvalds ret = -EFAULT; 7641da177e4SLinus Torvalds goto out; 7651da177e4SLinus Torvalds } 7661da177e4SLinus Torvalds *ppos = end; 7671da177e4SLinus Torvalds ret = count; 7681da177e4SLinus Torvalds out: 7691da177e4SLinus Torvalds up(&sel_sem); 7701da177e4SLinus Torvalds if (page) 7711da177e4SLinus Torvalds free_page((unsigned long)page); 7721da177e4SLinus Torvalds return ret; 7731da177e4SLinus Torvalds } 7741da177e4SLinus Torvalds 7751da177e4SLinus Torvalds static ssize_t sel_write_bool(struct file *filep, const char __user *buf, 7761da177e4SLinus Torvalds size_t count, loff_t *ppos) 7771da177e4SLinus Torvalds { 7781da177e4SLinus Torvalds char *page = NULL; 7791da177e4SLinus Torvalds ssize_t length = -EFAULT; 7801da177e4SLinus Torvalds int new_value; 7811da177e4SLinus Torvalds struct inode *inode; 7821da177e4SLinus Torvalds 7831da177e4SLinus Torvalds down(&sel_sem); 7841da177e4SLinus Torvalds 7851da177e4SLinus Torvalds length = task_has_security(current, SECURITY__SETBOOL); 7861da177e4SLinus Torvalds if (length) 7871da177e4SLinus Torvalds goto out; 7881da177e4SLinus Torvalds 7891da177e4SLinus Torvalds /* check to see if this file has been deleted */ 7901da177e4SLinus Torvalds if (!filep->f_op) 7911da177e4SLinus Torvalds goto out; 7921da177e4SLinus Torvalds 793bfd51626SDavi Arnaut if (count >= PAGE_SIZE) { 7941da177e4SLinus Torvalds length = -ENOMEM; 7951da177e4SLinus Torvalds goto out; 7961da177e4SLinus Torvalds } 7971da177e4SLinus Torvalds if (*ppos != 0) { 7981da177e4SLinus Torvalds /* No partial writes. */ 7991da177e4SLinus Torvalds goto out; 8001da177e4SLinus Torvalds } 8011da177e4SLinus Torvalds page = (char*)get_zeroed_page(GFP_KERNEL); 8021da177e4SLinus Torvalds if (!page) { 8031da177e4SLinus Torvalds length = -ENOMEM; 8041da177e4SLinus Torvalds goto out; 8051da177e4SLinus Torvalds } 8061da177e4SLinus Torvalds 8071da177e4SLinus Torvalds if (copy_from_user(page, buf, count)) 8081da177e4SLinus Torvalds goto out; 8091da177e4SLinus Torvalds 8101da177e4SLinus Torvalds length = -EINVAL; 8111da177e4SLinus Torvalds if (sscanf(page, "%d", &new_value) != 1) 8121da177e4SLinus Torvalds goto out; 8131da177e4SLinus Torvalds 8141da177e4SLinus Torvalds if (new_value) 8151da177e4SLinus Torvalds new_value = 1; 8161da177e4SLinus Torvalds 8171da177e4SLinus Torvalds inode = filep->f_dentry->d_inode; 8181da177e4SLinus Torvalds bool_pending_values[inode->i_ino - BOOL_INO_OFFSET] = new_value; 8191da177e4SLinus Torvalds length = count; 8201da177e4SLinus Torvalds 8211da177e4SLinus Torvalds out: 8221da177e4SLinus Torvalds up(&sel_sem); 8231da177e4SLinus Torvalds if (page) 8241da177e4SLinus Torvalds free_page((unsigned long) page); 8251da177e4SLinus Torvalds return length; 8261da177e4SLinus Torvalds } 8271da177e4SLinus Torvalds 8281da177e4SLinus Torvalds static struct file_operations sel_bool_ops = { 8291da177e4SLinus Torvalds .read = sel_read_bool, 8301da177e4SLinus Torvalds .write = sel_write_bool, 8311da177e4SLinus Torvalds }; 8321da177e4SLinus Torvalds 8331da177e4SLinus Torvalds static ssize_t sel_commit_bools_write(struct file *filep, 8341da177e4SLinus Torvalds const char __user *buf, 8351da177e4SLinus Torvalds size_t count, loff_t *ppos) 8361da177e4SLinus Torvalds { 8371da177e4SLinus Torvalds char *page = NULL; 8381da177e4SLinus Torvalds ssize_t length = -EFAULT; 8391da177e4SLinus Torvalds int new_value; 8401da177e4SLinus Torvalds 8411da177e4SLinus Torvalds down(&sel_sem); 8421da177e4SLinus Torvalds 8431da177e4SLinus Torvalds length = task_has_security(current, SECURITY__SETBOOL); 8441da177e4SLinus Torvalds if (length) 8451da177e4SLinus Torvalds goto out; 8461da177e4SLinus Torvalds 8471da177e4SLinus Torvalds /* check to see if this file has been deleted */ 8481da177e4SLinus Torvalds if (!filep->f_op) 8491da177e4SLinus Torvalds goto out; 8501da177e4SLinus Torvalds 851bfd51626SDavi Arnaut if (count >= PAGE_SIZE) { 8521da177e4SLinus Torvalds length = -ENOMEM; 8531da177e4SLinus Torvalds goto out; 8541da177e4SLinus Torvalds } 8551da177e4SLinus Torvalds if (*ppos != 0) { 8561da177e4SLinus Torvalds /* No partial writes. */ 8571da177e4SLinus Torvalds goto out; 8581da177e4SLinus Torvalds } 8591da177e4SLinus Torvalds page = (char*)get_zeroed_page(GFP_KERNEL); 8601da177e4SLinus Torvalds if (!page) { 8611da177e4SLinus Torvalds length = -ENOMEM; 8621da177e4SLinus Torvalds goto out; 8631da177e4SLinus Torvalds } 8641da177e4SLinus Torvalds 8651da177e4SLinus Torvalds if (copy_from_user(page, buf, count)) 8661da177e4SLinus Torvalds goto out; 8671da177e4SLinus Torvalds 8681da177e4SLinus Torvalds length = -EINVAL; 8691da177e4SLinus Torvalds if (sscanf(page, "%d", &new_value) != 1) 8701da177e4SLinus Torvalds goto out; 8711da177e4SLinus Torvalds 87220c19e41SDavi Arnaut if (new_value && bool_pending_values) { 8731da177e4SLinus Torvalds security_set_bools(bool_num, bool_pending_values); 8741da177e4SLinus Torvalds } 8751da177e4SLinus Torvalds 8761da177e4SLinus Torvalds length = count; 8771da177e4SLinus Torvalds 8781da177e4SLinus Torvalds out: 8791da177e4SLinus Torvalds up(&sel_sem); 8801da177e4SLinus Torvalds if (page) 8811da177e4SLinus Torvalds free_page((unsigned long) page); 8821da177e4SLinus Torvalds return length; 8831da177e4SLinus Torvalds } 8841da177e4SLinus Torvalds 8851da177e4SLinus Torvalds static struct file_operations sel_commit_bools_ops = { 8861da177e4SLinus Torvalds .write = sel_commit_bools_write, 8871da177e4SLinus Torvalds }; 8881da177e4SLinus Torvalds 8891da177e4SLinus Torvalds /* delete booleans - partial revoke() from 8901da177e4SLinus Torvalds * fs/proc/generic.c proc_kill_inodes */ 8911da177e4SLinus Torvalds static void sel_remove_bools(struct dentry *de) 8921da177e4SLinus Torvalds { 8931da177e4SLinus Torvalds struct list_head *p, *node; 8941da177e4SLinus Torvalds struct super_block *sb = de->d_sb; 8951da177e4SLinus Torvalds 8961da177e4SLinus Torvalds spin_lock(&dcache_lock); 8971da177e4SLinus Torvalds node = de->d_subdirs.next; 8981da177e4SLinus Torvalds while (node != &de->d_subdirs) { 8991da177e4SLinus Torvalds struct dentry *d = list_entry(node, struct dentry, d_child); 9001da177e4SLinus Torvalds list_del_init(node); 9011da177e4SLinus Torvalds 9021da177e4SLinus Torvalds if (d->d_inode) { 9031da177e4SLinus Torvalds d = dget_locked(d); 9041da177e4SLinus Torvalds spin_unlock(&dcache_lock); 9051da177e4SLinus Torvalds d_delete(d); 9061da177e4SLinus Torvalds simple_unlink(de->d_inode, d); 9071da177e4SLinus Torvalds dput(d); 9081da177e4SLinus Torvalds spin_lock(&dcache_lock); 9091da177e4SLinus Torvalds } 9101da177e4SLinus Torvalds node = de->d_subdirs.next; 9111da177e4SLinus Torvalds } 9121da177e4SLinus Torvalds 9131da177e4SLinus Torvalds spin_unlock(&dcache_lock); 9141da177e4SLinus Torvalds 9151da177e4SLinus Torvalds file_list_lock(); 9161da177e4SLinus Torvalds list_for_each(p, &sb->s_files) { 9172f512016SEric Dumazet struct file * filp = list_entry(p, struct file, f_u.fu_list); 9181da177e4SLinus Torvalds struct dentry * dentry = filp->f_dentry; 9191da177e4SLinus Torvalds 9201da177e4SLinus Torvalds if (dentry->d_parent != de) { 9211da177e4SLinus Torvalds continue; 9221da177e4SLinus Torvalds } 9231da177e4SLinus Torvalds filp->f_op = NULL; 9241da177e4SLinus Torvalds } 9251da177e4SLinus Torvalds file_list_unlock(); 9261da177e4SLinus Torvalds } 9271da177e4SLinus Torvalds 9281da177e4SLinus Torvalds #define BOOL_DIR_NAME "booleans" 9291da177e4SLinus Torvalds 9301da177e4SLinus Torvalds static int sel_make_bools(void) 9311da177e4SLinus Torvalds { 9321da177e4SLinus Torvalds int i, ret = 0; 9331da177e4SLinus Torvalds ssize_t len; 9341da177e4SLinus Torvalds struct dentry *dentry = NULL; 9351da177e4SLinus Torvalds struct dentry *dir = bool_dir; 9361da177e4SLinus Torvalds struct inode *inode = NULL; 9371da177e4SLinus Torvalds struct inode_security_struct *isec; 9381da177e4SLinus Torvalds char **names = NULL, *page; 9391da177e4SLinus Torvalds int num; 9401da177e4SLinus Torvalds int *values = NULL; 9411da177e4SLinus Torvalds u32 sid; 9421da177e4SLinus Torvalds 9431da177e4SLinus Torvalds /* remove any existing files */ 9441da177e4SLinus Torvalds kfree(bool_pending_values); 94520c19e41SDavi Arnaut bool_pending_values = NULL; 9461da177e4SLinus Torvalds 9471da177e4SLinus Torvalds sel_remove_bools(dir); 9481da177e4SLinus Torvalds 9491da177e4SLinus Torvalds if (!(page = (char*)get_zeroed_page(GFP_KERNEL))) 9501da177e4SLinus Torvalds return -ENOMEM; 9511da177e4SLinus Torvalds 9521da177e4SLinus Torvalds ret = security_get_bools(&num, &names, &values); 9531da177e4SLinus Torvalds if (ret != 0) 9541da177e4SLinus Torvalds goto out; 9551da177e4SLinus Torvalds 9561da177e4SLinus Torvalds for (i = 0; i < num; i++) { 9571da177e4SLinus Torvalds dentry = d_alloc_name(dir, names[i]); 9581da177e4SLinus Torvalds if (!dentry) { 9591da177e4SLinus Torvalds ret = -ENOMEM; 9601da177e4SLinus Torvalds goto err; 9611da177e4SLinus Torvalds } 9621da177e4SLinus Torvalds inode = sel_make_inode(dir->d_sb, S_IFREG | S_IRUGO | S_IWUSR); 9631da177e4SLinus Torvalds if (!inode) { 9641da177e4SLinus Torvalds ret = -ENOMEM; 9651da177e4SLinus Torvalds goto err; 9661da177e4SLinus Torvalds } 9671da177e4SLinus Torvalds 9681da177e4SLinus Torvalds len = snprintf(page, PAGE_SIZE, "/%s/%s", BOOL_DIR_NAME, names[i]); 9691da177e4SLinus Torvalds if (len < 0) { 9701da177e4SLinus Torvalds ret = -EINVAL; 9711da177e4SLinus Torvalds goto err; 9721da177e4SLinus Torvalds } else if (len >= PAGE_SIZE) { 9731da177e4SLinus Torvalds ret = -ENAMETOOLONG; 9741da177e4SLinus Torvalds goto err; 9751da177e4SLinus Torvalds } 9761da177e4SLinus Torvalds isec = (struct inode_security_struct*)inode->i_security; 9771da177e4SLinus Torvalds if ((ret = security_genfs_sid("selinuxfs", page, SECCLASS_FILE, &sid))) 9781da177e4SLinus Torvalds goto err; 9791da177e4SLinus Torvalds isec->sid = sid; 9801da177e4SLinus Torvalds isec->initialized = 1; 9811da177e4SLinus Torvalds inode->i_fop = &sel_bool_ops; 9821da177e4SLinus Torvalds inode->i_ino = i + BOOL_INO_OFFSET; 9831da177e4SLinus Torvalds d_add(dentry, inode); 9841da177e4SLinus Torvalds } 9851da177e4SLinus Torvalds bool_num = num; 9861da177e4SLinus Torvalds bool_pending_values = values; 9871da177e4SLinus Torvalds out: 9881da177e4SLinus Torvalds free_page((unsigned long)page); 9891da177e4SLinus Torvalds if (names) { 9909a5f04bfSJesper Juhl for (i = 0; i < num; i++) 9911da177e4SLinus Torvalds kfree(names[i]); 9921da177e4SLinus Torvalds kfree(names); 9931da177e4SLinus Torvalds } 9941da177e4SLinus Torvalds return ret; 9951da177e4SLinus Torvalds err: 99620c19e41SDavi Arnaut kfree(values); 9971da177e4SLinus Torvalds d_genocide(dir); 9981da177e4SLinus Torvalds ret = -ENOMEM; 9991da177e4SLinus Torvalds goto out; 10001da177e4SLinus Torvalds } 10011da177e4SLinus Torvalds 10021da177e4SLinus Torvalds #define NULL_FILE_NAME "null" 10031da177e4SLinus Torvalds 10041da177e4SLinus Torvalds struct dentry *selinux_null = NULL; 10051da177e4SLinus Torvalds 10061da177e4SLinus Torvalds static ssize_t sel_read_avc_cache_threshold(struct file *filp, char __user *buf, 10071da177e4SLinus Torvalds size_t count, loff_t *ppos) 10081da177e4SLinus Torvalds { 10091da177e4SLinus Torvalds char tmpbuf[TMPBUFLEN]; 10101da177e4SLinus Torvalds ssize_t length; 10111da177e4SLinus Torvalds 10121da177e4SLinus Torvalds length = scnprintf(tmpbuf, TMPBUFLEN, "%u", avc_cache_threshold); 10131da177e4SLinus Torvalds return simple_read_from_buffer(buf, count, ppos, tmpbuf, length); 10141da177e4SLinus Torvalds } 10151da177e4SLinus Torvalds 10161da177e4SLinus Torvalds static ssize_t sel_write_avc_cache_threshold(struct file * file, 10171da177e4SLinus Torvalds const char __user * buf, 10181da177e4SLinus Torvalds size_t count, loff_t *ppos) 10191da177e4SLinus Torvalds 10201da177e4SLinus Torvalds { 10211da177e4SLinus Torvalds char *page; 10221da177e4SLinus Torvalds ssize_t ret; 10231da177e4SLinus Torvalds int new_value; 10241da177e4SLinus Torvalds 1025bfd51626SDavi Arnaut if (count >= PAGE_SIZE) { 10261da177e4SLinus Torvalds ret = -ENOMEM; 10271da177e4SLinus Torvalds goto out; 10281da177e4SLinus Torvalds } 10291da177e4SLinus Torvalds 10301da177e4SLinus Torvalds if (*ppos != 0) { 10311da177e4SLinus Torvalds /* No partial writes. */ 10321da177e4SLinus Torvalds ret = -EINVAL; 10331da177e4SLinus Torvalds goto out; 10341da177e4SLinus Torvalds } 10351da177e4SLinus Torvalds 10361da177e4SLinus Torvalds page = (char*)get_zeroed_page(GFP_KERNEL); 10371da177e4SLinus Torvalds if (!page) { 10381da177e4SLinus Torvalds ret = -ENOMEM; 10391da177e4SLinus Torvalds goto out; 10401da177e4SLinus Torvalds } 10411da177e4SLinus Torvalds 10421da177e4SLinus Torvalds if (copy_from_user(page, buf, count)) { 10431da177e4SLinus Torvalds ret = -EFAULT; 10441da177e4SLinus Torvalds goto out_free; 10451da177e4SLinus Torvalds } 10461da177e4SLinus Torvalds 10471da177e4SLinus Torvalds if (sscanf(page, "%u", &new_value) != 1) { 10481da177e4SLinus Torvalds ret = -EINVAL; 10491da177e4SLinus Torvalds goto out; 10501da177e4SLinus Torvalds } 10511da177e4SLinus Torvalds 10521da177e4SLinus Torvalds if (new_value != avc_cache_threshold) { 10531da177e4SLinus Torvalds ret = task_has_security(current, SECURITY__SETSECPARAM); 10541da177e4SLinus Torvalds if (ret) 10551da177e4SLinus Torvalds goto out_free; 10561da177e4SLinus Torvalds avc_cache_threshold = new_value; 10571da177e4SLinus Torvalds } 10581da177e4SLinus Torvalds ret = count; 10591da177e4SLinus Torvalds out_free: 10601da177e4SLinus Torvalds free_page((unsigned long)page); 10611da177e4SLinus Torvalds out: 10621da177e4SLinus Torvalds return ret; 10631da177e4SLinus Torvalds } 10641da177e4SLinus Torvalds 10651da177e4SLinus Torvalds static ssize_t sel_read_avc_hash_stats(struct file *filp, char __user *buf, 10661da177e4SLinus Torvalds size_t count, loff_t *ppos) 10671da177e4SLinus Torvalds { 10681da177e4SLinus Torvalds char *page; 10691da177e4SLinus Torvalds ssize_t ret = 0; 10701da177e4SLinus Torvalds 10711da177e4SLinus Torvalds page = (char *)__get_free_page(GFP_KERNEL); 10721da177e4SLinus Torvalds if (!page) { 10731da177e4SLinus Torvalds ret = -ENOMEM; 10741da177e4SLinus Torvalds goto out; 10751da177e4SLinus Torvalds } 10761da177e4SLinus Torvalds ret = avc_get_hash_stats(page); 10771da177e4SLinus Torvalds if (ret >= 0) 10781da177e4SLinus Torvalds ret = simple_read_from_buffer(buf, count, ppos, page, ret); 10791da177e4SLinus Torvalds free_page((unsigned long)page); 10801da177e4SLinus Torvalds out: 10811da177e4SLinus Torvalds return ret; 10821da177e4SLinus Torvalds } 10831da177e4SLinus Torvalds 10841da177e4SLinus Torvalds static struct file_operations sel_avc_cache_threshold_ops = { 10851da177e4SLinus Torvalds .read = sel_read_avc_cache_threshold, 10861da177e4SLinus Torvalds .write = sel_write_avc_cache_threshold, 10871da177e4SLinus Torvalds }; 10881da177e4SLinus Torvalds 10891da177e4SLinus Torvalds static struct file_operations sel_avc_hash_stats_ops = { 10901da177e4SLinus Torvalds .read = sel_read_avc_hash_stats, 10911da177e4SLinus Torvalds }; 10921da177e4SLinus Torvalds 10931da177e4SLinus Torvalds #ifdef CONFIG_SECURITY_SELINUX_AVC_STATS 10941da177e4SLinus Torvalds static struct avc_cache_stats *sel_avc_get_stat_idx(loff_t *idx) 10951da177e4SLinus Torvalds { 10961da177e4SLinus Torvalds int cpu; 10971da177e4SLinus Torvalds 10981da177e4SLinus Torvalds for (cpu = *idx; cpu < NR_CPUS; ++cpu) { 10991da177e4SLinus Torvalds if (!cpu_possible(cpu)) 11001da177e4SLinus Torvalds continue; 11011da177e4SLinus Torvalds *idx = cpu + 1; 11021da177e4SLinus Torvalds return &per_cpu(avc_cache_stats, cpu); 11031da177e4SLinus Torvalds } 11041da177e4SLinus Torvalds return NULL; 11051da177e4SLinus Torvalds } 11061da177e4SLinus Torvalds 11071da177e4SLinus Torvalds static void *sel_avc_stats_seq_start(struct seq_file *seq, loff_t *pos) 11081da177e4SLinus Torvalds { 11091da177e4SLinus Torvalds loff_t n = *pos - 1; 11101da177e4SLinus Torvalds 11111da177e4SLinus Torvalds if (*pos == 0) 11121da177e4SLinus Torvalds return SEQ_START_TOKEN; 11131da177e4SLinus Torvalds 11141da177e4SLinus Torvalds return sel_avc_get_stat_idx(&n); 11151da177e4SLinus Torvalds } 11161da177e4SLinus Torvalds 11171da177e4SLinus Torvalds static void *sel_avc_stats_seq_next(struct seq_file *seq, void *v, loff_t *pos) 11181da177e4SLinus Torvalds { 11191da177e4SLinus Torvalds return sel_avc_get_stat_idx(pos); 11201da177e4SLinus Torvalds } 11211da177e4SLinus Torvalds 11221da177e4SLinus Torvalds static int sel_avc_stats_seq_show(struct seq_file *seq, void *v) 11231da177e4SLinus Torvalds { 11241da177e4SLinus Torvalds struct avc_cache_stats *st = v; 11251da177e4SLinus Torvalds 11261da177e4SLinus Torvalds if (v == SEQ_START_TOKEN) 11271da177e4SLinus Torvalds seq_printf(seq, "lookups hits misses allocations reclaims " 11281da177e4SLinus Torvalds "frees\n"); 11291da177e4SLinus Torvalds else 11301da177e4SLinus Torvalds seq_printf(seq, "%u %u %u %u %u %u\n", st->lookups, 11311da177e4SLinus Torvalds st->hits, st->misses, st->allocations, 11321da177e4SLinus Torvalds st->reclaims, st->frees); 11331da177e4SLinus Torvalds return 0; 11341da177e4SLinus Torvalds } 11351da177e4SLinus Torvalds 11361da177e4SLinus Torvalds static void sel_avc_stats_seq_stop(struct seq_file *seq, void *v) 11371da177e4SLinus Torvalds { } 11381da177e4SLinus Torvalds 11391da177e4SLinus Torvalds static struct seq_operations sel_avc_cache_stats_seq_ops = { 11401da177e4SLinus Torvalds .start = sel_avc_stats_seq_start, 11411da177e4SLinus Torvalds .next = sel_avc_stats_seq_next, 11421da177e4SLinus Torvalds .show = sel_avc_stats_seq_show, 11431da177e4SLinus Torvalds .stop = sel_avc_stats_seq_stop, 11441da177e4SLinus Torvalds }; 11451da177e4SLinus Torvalds 11461da177e4SLinus Torvalds static int sel_open_avc_cache_stats(struct inode *inode, struct file *file) 11471da177e4SLinus Torvalds { 11481da177e4SLinus Torvalds return seq_open(file, &sel_avc_cache_stats_seq_ops); 11491da177e4SLinus Torvalds } 11501da177e4SLinus Torvalds 11511da177e4SLinus Torvalds static struct file_operations sel_avc_cache_stats_ops = { 11521da177e4SLinus Torvalds .open = sel_open_avc_cache_stats, 11531da177e4SLinus Torvalds .read = seq_read, 11541da177e4SLinus Torvalds .llseek = seq_lseek, 11551da177e4SLinus Torvalds .release = seq_release, 11561da177e4SLinus Torvalds }; 11571da177e4SLinus Torvalds #endif 11581da177e4SLinus Torvalds 11591da177e4SLinus Torvalds static int sel_make_avc_files(struct dentry *dir) 11601da177e4SLinus Torvalds { 11611da177e4SLinus Torvalds int i, ret = 0; 11621da177e4SLinus Torvalds static struct tree_descr files[] = { 11631da177e4SLinus Torvalds { "cache_threshold", 11641da177e4SLinus Torvalds &sel_avc_cache_threshold_ops, S_IRUGO|S_IWUSR }, 11651da177e4SLinus Torvalds { "hash_stats", &sel_avc_hash_stats_ops, S_IRUGO }, 11661da177e4SLinus Torvalds #ifdef CONFIG_SECURITY_SELINUX_AVC_STATS 11671da177e4SLinus Torvalds { "cache_stats", &sel_avc_cache_stats_ops, S_IRUGO }, 11681da177e4SLinus Torvalds #endif 11691da177e4SLinus Torvalds }; 11701da177e4SLinus Torvalds 11711da177e4SLinus Torvalds for (i = 0; i < sizeof (files) / sizeof (files[0]); i++) { 11721da177e4SLinus Torvalds struct inode *inode; 11731da177e4SLinus Torvalds struct dentry *dentry; 11741da177e4SLinus Torvalds 11751da177e4SLinus Torvalds dentry = d_alloc_name(dir, files[i].name); 11761da177e4SLinus Torvalds if (!dentry) { 11771da177e4SLinus Torvalds ret = -ENOMEM; 11781da177e4SLinus Torvalds goto err; 11791da177e4SLinus Torvalds } 11801da177e4SLinus Torvalds 11811da177e4SLinus Torvalds inode = sel_make_inode(dir->d_sb, S_IFREG|files[i].mode); 11821da177e4SLinus Torvalds if (!inode) { 11831da177e4SLinus Torvalds ret = -ENOMEM; 11841da177e4SLinus Torvalds goto err; 11851da177e4SLinus Torvalds } 11861da177e4SLinus Torvalds inode->i_fop = files[i].ops; 11871da177e4SLinus Torvalds d_add(dentry, inode); 11881da177e4SLinus Torvalds } 11891da177e4SLinus Torvalds out: 11901da177e4SLinus Torvalds return ret; 11911da177e4SLinus Torvalds err: 11921da177e4SLinus Torvalds d_genocide(dir); 11931da177e4SLinus Torvalds goto out; 11941da177e4SLinus Torvalds } 11951da177e4SLinus Torvalds 11961da177e4SLinus Torvalds static int sel_make_dir(struct super_block *sb, struct dentry *dentry) 11971da177e4SLinus Torvalds { 11981da177e4SLinus Torvalds int ret = 0; 11991da177e4SLinus Torvalds struct inode *inode; 12001da177e4SLinus Torvalds 12011da177e4SLinus Torvalds inode = sel_make_inode(sb, S_IFDIR | S_IRUGO | S_IXUGO); 12021da177e4SLinus Torvalds if (!inode) { 12031da177e4SLinus Torvalds ret = -ENOMEM; 12041da177e4SLinus Torvalds goto out; 12051da177e4SLinus Torvalds } 12061da177e4SLinus Torvalds inode->i_op = &simple_dir_inode_operations; 12071da177e4SLinus Torvalds inode->i_fop = &simple_dir_operations; 12081da177e4SLinus Torvalds d_add(dentry, inode); 12091da177e4SLinus Torvalds out: 12101da177e4SLinus Torvalds return ret; 12111da177e4SLinus Torvalds } 12121da177e4SLinus Torvalds 12131da177e4SLinus Torvalds static int sel_fill_super(struct super_block * sb, void * data, int silent) 12141da177e4SLinus Torvalds { 12151da177e4SLinus Torvalds int ret; 12161da177e4SLinus Torvalds struct dentry *dentry; 12171da177e4SLinus Torvalds struct inode *inode; 12181da177e4SLinus Torvalds struct inode_security_struct *isec; 12191da177e4SLinus Torvalds 12201da177e4SLinus Torvalds static struct tree_descr selinux_files[] = { 12211da177e4SLinus Torvalds [SEL_LOAD] = {"load", &sel_load_ops, S_IRUSR|S_IWUSR}, 12221da177e4SLinus Torvalds [SEL_ENFORCE] = {"enforce", &sel_enforce_ops, S_IRUGO|S_IWUSR}, 12231da177e4SLinus Torvalds [SEL_CONTEXT] = {"context", &sel_context_ops, S_IRUGO|S_IWUGO}, 12241da177e4SLinus Torvalds [SEL_ACCESS] = {"access", &transaction_ops, S_IRUGO|S_IWUGO}, 12251da177e4SLinus Torvalds [SEL_CREATE] = {"create", &transaction_ops, S_IRUGO|S_IWUGO}, 12261da177e4SLinus Torvalds [SEL_RELABEL] = {"relabel", &transaction_ops, S_IRUGO|S_IWUGO}, 12271da177e4SLinus Torvalds [SEL_USER] = {"user", &transaction_ops, S_IRUGO|S_IWUGO}, 12281da177e4SLinus Torvalds [SEL_POLICYVERS] = {"policyvers", &sel_policyvers_ops, S_IRUGO}, 12291da177e4SLinus Torvalds [SEL_COMMIT_BOOLS] = {"commit_pending_bools", &sel_commit_bools_ops, S_IWUSR}, 12301da177e4SLinus Torvalds [SEL_MLS] = {"mls", &sel_mls_ops, S_IRUGO}, 12311da177e4SLinus Torvalds [SEL_DISABLE] = {"disable", &sel_disable_ops, S_IWUSR}, 12321da177e4SLinus Torvalds [SEL_MEMBER] = {"member", &transaction_ops, S_IRUGO|S_IWUGO}, 12331da177e4SLinus Torvalds [SEL_CHECKREQPROT] = {"checkreqprot", &sel_checkreqprot_ops, S_IRUGO|S_IWUSR}, 12341da177e4SLinus Torvalds /* last one */ {""} 12351da177e4SLinus Torvalds }; 12361da177e4SLinus Torvalds ret = simple_fill_super(sb, SELINUX_MAGIC, selinux_files); 12371da177e4SLinus Torvalds if (ret) 12381da177e4SLinus Torvalds return ret; 12391da177e4SLinus Torvalds 12401da177e4SLinus Torvalds dentry = d_alloc_name(sb->s_root, BOOL_DIR_NAME); 12411da177e4SLinus Torvalds if (!dentry) 12421da177e4SLinus Torvalds return -ENOMEM; 12431da177e4SLinus Torvalds 12441da177e4SLinus Torvalds inode = sel_make_inode(sb, S_IFDIR | S_IRUGO | S_IXUGO); 12451da177e4SLinus Torvalds if (!inode) 12461da177e4SLinus Torvalds goto out; 12471da177e4SLinus Torvalds inode->i_op = &simple_dir_inode_operations; 12481da177e4SLinus Torvalds inode->i_fop = &simple_dir_operations; 12491da177e4SLinus Torvalds d_add(dentry, inode); 12501da177e4SLinus Torvalds bool_dir = dentry; 12511da177e4SLinus Torvalds ret = sel_make_bools(); 12521da177e4SLinus Torvalds if (ret) 12531da177e4SLinus Torvalds goto out; 12541da177e4SLinus Torvalds 12551da177e4SLinus Torvalds dentry = d_alloc_name(sb->s_root, NULL_FILE_NAME); 12561da177e4SLinus Torvalds if (!dentry) 12571da177e4SLinus Torvalds return -ENOMEM; 12581da177e4SLinus Torvalds 12591da177e4SLinus Torvalds inode = sel_make_inode(sb, S_IFCHR | S_IRUGO | S_IWUGO); 12601da177e4SLinus Torvalds if (!inode) 12611da177e4SLinus Torvalds goto out; 12621da177e4SLinus Torvalds isec = (struct inode_security_struct*)inode->i_security; 12631da177e4SLinus Torvalds isec->sid = SECINITSID_DEVNULL; 12641da177e4SLinus Torvalds isec->sclass = SECCLASS_CHR_FILE; 12651da177e4SLinus Torvalds isec->initialized = 1; 12661da177e4SLinus Torvalds 12671da177e4SLinus Torvalds init_special_inode(inode, S_IFCHR | S_IRUGO | S_IWUGO, MKDEV(MEM_MAJOR, 3)); 12681da177e4SLinus Torvalds d_add(dentry, inode); 12691da177e4SLinus Torvalds selinux_null = dentry; 12701da177e4SLinus Torvalds 12711da177e4SLinus Torvalds dentry = d_alloc_name(sb->s_root, "avc"); 12721da177e4SLinus Torvalds if (!dentry) 12731da177e4SLinus Torvalds return -ENOMEM; 12741da177e4SLinus Torvalds 12751da177e4SLinus Torvalds ret = sel_make_dir(sb, dentry); 12761da177e4SLinus Torvalds if (ret) 12771da177e4SLinus Torvalds goto out; 12781da177e4SLinus Torvalds 12791da177e4SLinus Torvalds ret = sel_make_avc_files(dentry); 12801da177e4SLinus Torvalds if (ret) 12811da177e4SLinus Torvalds goto out; 12821da177e4SLinus Torvalds 12831da177e4SLinus Torvalds return 0; 12841da177e4SLinus Torvalds out: 12851da177e4SLinus Torvalds dput(dentry); 12861da177e4SLinus Torvalds printk(KERN_ERR "%s: failed while creating inodes\n", __FUNCTION__); 12871da177e4SLinus Torvalds return -ENOMEM; 12881da177e4SLinus Torvalds } 12891da177e4SLinus Torvalds 12901da177e4SLinus Torvalds static struct super_block *sel_get_sb(struct file_system_type *fs_type, 12911da177e4SLinus Torvalds int flags, const char *dev_name, void *data) 12921da177e4SLinus Torvalds { 12931da177e4SLinus Torvalds return get_sb_single(fs_type, flags, data, sel_fill_super); 12941da177e4SLinus Torvalds } 12951da177e4SLinus Torvalds 12961da177e4SLinus Torvalds static struct file_system_type sel_fs_type = { 12971da177e4SLinus Torvalds .name = "selinuxfs", 12981da177e4SLinus Torvalds .get_sb = sel_get_sb, 12991da177e4SLinus Torvalds .kill_sb = kill_litter_super, 13001da177e4SLinus Torvalds }; 13011da177e4SLinus Torvalds 13021da177e4SLinus Torvalds struct vfsmount *selinuxfs_mount; 13031da177e4SLinus Torvalds 13041da177e4SLinus Torvalds static int __init init_sel_fs(void) 13051da177e4SLinus Torvalds { 13061da177e4SLinus Torvalds int err; 13071da177e4SLinus Torvalds 13081da177e4SLinus Torvalds if (!selinux_enabled) 13091da177e4SLinus Torvalds return 0; 13101da177e4SLinus Torvalds err = register_filesystem(&sel_fs_type); 13111da177e4SLinus Torvalds if (!err) { 13121da177e4SLinus Torvalds selinuxfs_mount = kern_mount(&sel_fs_type); 13131da177e4SLinus Torvalds if (IS_ERR(selinuxfs_mount)) { 13141da177e4SLinus Torvalds printk(KERN_ERR "selinuxfs: could not mount!\n"); 13151da177e4SLinus Torvalds err = PTR_ERR(selinuxfs_mount); 13161da177e4SLinus Torvalds selinuxfs_mount = NULL; 13171da177e4SLinus Torvalds } 13181da177e4SLinus Torvalds } 13191da177e4SLinus Torvalds return err; 13201da177e4SLinus Torvalds } 13211da177e4SLinus Torvalds 13221da177e4SLinus Torvalds __initcall(init_sel_fs); 13231da177e4SLinus Torvalds 13241da177e4SLinus Torvalds #ifdef CONFIG_SECURITY_SELINUX_DISABLE 13251da177e4SLinus Torvalds void exit_sel_fs(void) 13261da177e4SLinus Torvalds { 13271da177e4SLinus Torvalds unregister_filesystem(&sel_fs_type); 13281da177e4SLinus Torvalds } 13291da177e4SLinus Torvalds #endif 1330