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 71cee74f47SEric Paris static char policy_opened; 72cee74f47SEric Paris 733bb56b25SPaul Moore /* global data for policy capabilities */ 741872981bSEric Paris static struct dentry *policycap_dir; 753bb56b25SPaul Moore 761da177e4SLinus Torvalds extern void selnl_notify_setenforce(int val); 771da177e4SLinus Torvalds 781da177e4SLinus Torvalds /* Check whether a task is allowed to use a security operation. */ 791da177e4SLinus Torvalds static int task_has_security(struct task_struct *tsk, 801da177e4SLinus Torvalds u32 perms) 811da177e4SLinus Torvalds { 82c69e8d9cSDavid Howells const struct task_security_struct *tsec; 83c69e8d9cSDavid Howells u32 sid = 0; 841da177e4SLinus Torvalds 85c69e8d9cSDavid Howells rcu_read_lock(); 86c69e8d9cSDavid Howells tsec = __task_cred(tsk)->security; 87c69e8d9cSDavid Howells if (tsec) 88c69e8d9cSDavid Howells sid = tsec->sid; 89c69e8d9cSDavid Howells rcu_read_unlock(); 901da177e4SLinus Torvalds if (!tsec) 911da177e4SLinus Torvalds return -EACCES; 921da177e4SLinus Torvalds 93c69e8d9cSDavid Howells return avc_has_perm(sid, SECINITSID_SECURITY, 941da177e4SLinus Torvalds SECCLASS_SECURITY, perms, NULL); 951da177e4SLinus Torvalds } 961da177e4SLinus Torvalds 971da177e4SLinus Torvalds enum sel_inos { 981da177e4SLinus Torvalds SEL_ROOT_INO = 2, 991da177e4SLinus Torvalds SEL_LOAD, /* load policy */ 1001da177e4SLinus Torvalds SEL_ENFORCE, /* get or set enforcing status */ 1011da177e4SLinus Torvalds SEL_CONTEXT, /* validate context */ 1021da177e4SLinus Torvalds SEL_ACCESS, /* compute access decision */ 1031da177e4SLinus Torvalds SEL_CREATE, /* compute create labeling decision */ 1041da177e4SLinus Torvalds SEL_RELABEL, /* compute relabeling decision */ 1051da177e4SLinus Torvalds SEL_USER, /* compute reachable user contexts */ 1061da177e4SLinus Torvalds SEL_POLICYVERS, /* return policy version for this kernel */ 1071da177e4SLinus Torvalds SEL_COMMIT_BOOLS, /* commit new boolean values */ 1081da177e4SLinus Torvalds SEL_MLS, /* return if MLS policy is enabled */ 1091da177e4SLinus Torvalds SEL_DISABLE, /* disable SELinux until next reboot */ 1101da177e4SLinus Torvalds SEL_MEMBER, /* compute polyinstantiation membership decision */ 1111da177e4SLinus Torvalds SEL_CHECKREQPROT, /* check requested protection, not kernel-applied one */ 1124e5ab4cbSJames Morris SEL_COMPAT_NET, /* whether to use old compat network packet controls */ 1133f12070eSEric Paris SEL_REJECT_UNKNOWN, /* export unknown reject handling to userspace */ 1143f12070eSEric Paris SEL_DENY_UNKNOWN, /* export unknown deny handling to userspace */ 11511904167SKaiGai Kohei SEL_STATUS, /* export current status using mmap() */ 116cee74f47SEric Paris SEL_POLICY, /* allow userspace to read the in kernel policy */ 1176174eafcSJames Carter SEL_INO_NEXT, /* The next inode number to use */ 1181da177e4SLinus Torvalds }; 1191da177e4SLinus Torvalds 1206174eafcSJames Carter static unsigned long sel_last_ino = SEL_INO_NEXT - 1; 1216174eafcSJames Carter 122f0ee2e46SJames Carter #define SEL_INITCON_INO_OFFSET 0x01000000 123bce34bc0SJames Carter #define SEL_BOOL_INO_OFFSET 0x02000000 124e47c8fc5SChristopher J. PeBenito #define SEL_CLASS_INO_OFFSET 0x04000000 1253bb56b25SPaul Moore #define SEL_POLICYCAP_INO_OFFSET 0x08000000 126f0ee2e46SJames Carter #define SEL_INO_MASK 0x00ffffff 127f0ee2e46SJames Carter 1281da177e4SLinus Torvalds #define TMPBUFLEN 12 1291da177e4SLinus Torvalds static ssize_t sel_read_enforce(struct file *filp, char __user *buf, 1301da177e4SLinus Torvalds size_t count, loff_t *ppos) 1311da177e4SLinus Torvalds { 1321da177e4SLinus Torvalds char tmpbuf[TMPBUFLEN]; 1331da177e4SLinus Torvalds ssize_t length; 1341da177e4SLinus Torvalds 1351da177e4SLinus Torvalds length = scnprintf(tmpbuf, TMPBUFLEN, "%d", selinux_enforcing); 1361da177e4SLinus Torvalds return simple_read_from_buffer(buf, count, ppos, tmpbuf, length); 1371da177e4SLinus Torvalds } 1381da177e4SLinus Torvalds 1391da177e4SLinus Torvalds #ifdef CONFIG_SECURITY_SELINUX_DEVELOP 1401da177e4SLinus Torvalds static ssize_t sel_write_enforce(struct file *file, const char __user *buf, 1411da177e4SLinus Torvalds size_t count, loff_t *ppos) 1421da177e4SLinus Torvalds 1431da177e4SLinus Torvalds { 1441da177e4SLinus Torvalds char *page; 1451da177e4SLinus Torvalds ssize_t length; 1461da177e4SLinus Torvalds int new_value; 1471da177e4SLinus Torvalds 148bfd51626SDavi Arnaut if (count >= PAGE_SIZE) 1491da177e4SLinus Torvalds return -ENOMEM; 1501da177e4SLinus Torvalds if (*ppos != 0) { 1511da177e4SLinus Torvalds /* No partial writes. */ 1521da177e4SLinus Torvalds return -EINVAL; 1531da177e4SLinus Torvalds } 1541da177e4SLinus Torvalds page = (char *)get_zeroed_page(GFP_KERNEL); 1551da177e4SLinus Torvalds if (!page) 1561da177e4SLinus Torvalds return -ENOMEM; 1571da177e4SLinus Torvalds length = -EFAULT; 1581da177e4SLinus Torvalds if (copy_from_user(page, buf, count)) 1591da177e4SLinus Torvalds goto out; 1601da177e4SLinus Torvalds 1611da177e4SLinus Torvalds length = -EINVAL; 1621da177e4SLinus Torvalds if (sscanf(page, "%d", &new_value) != 1) 1631da177e4SLinus Torvalds goto out; 1641da177e4SLinus Torvalds 1651da177e4SLinus Torvalds if (new_value != selinux_enforcing) { 1661da177e4SLinus Torvalds length = task_has_security(current, SECURITY__SETENFORCE); 1671da177e4SLinus Torvalds if (length) 1681da177e4SLinus Torvalds goto out; 169af601e46SSteve Grubb audit_log(current->audit_context, GFP_KERNEL, AUDIT_MAC_STATUS, 1704746ec5bSEric Paris "enforcing=%d old_enforcing=%d auid=%u ses=%u", 1714746ec5bSEric Paris new_value, selinux_enforcing, 1724746ec5bSEric Paris audit_get_loginuid(current), 1734746ec5bSEric Paris audit_get_sessionid(current)); 1741da177e4SLinus Torvalds selinux_enforcing = new_value; 1751da177e4SLinus Torvalds if (selinux_enforcing) 1761da177e4SLinus Torvalds avc_ss_reset(0); 1771da177e4SLinus Torvalds selnl_notify_setenforce(selinux_enforcing); 17811904167SKaiGai Kohei selinux_status_update_setenforce(selinux_enforcing); 1791da177e4SLinus Torvalds } 1801da177e4SLinus Torvalds length = count; 1811da177e4SLinus Torvalds out: 1821da177e4SLinus Torvalds free_page((unsigned long) page); 1831da177e4SLinus Torvalds return length; 1841da177e4SLinus Torvalds } 1851da177e4SLinus Torvalds #else 1861da177e4SLinus Torvalds #define sel_write_enforce NULL 1871da177e4SLinus Torvalds #endif 1881da177e4SLinus Torvalds 1899c2e08c5SArjan van de Ven static const struct file_operations sel_enforce_ops = { 1901da177e4SLinus Torvalds .read = sel_read_enforce, 1911da177e4SLinus Torvalds .write = sel_write_enforce, 19257a62c23SArnd Bergmann .llseek = generic_file_llseek, 1931da177e4SLinus Torvalds }; 1941da177e4SLinus Torvalds 1953f12070eSEric Paris static ssize_t sel_read_handle_unknown(struct file *filp, char __user *buf, 1963f12070eSEric Paris size_t count, loff_t *ppos) 1973f12070eSEric Paris { 1983f12070eSEric Paris char tmpbuf[TMPBUFLEN]; 1993f12070eSEric Paris ssize_t length; 2003f12070eSEric Paris ino_t ino = filp->f_path.dentry->d_inode->i_ino; 2013f12070eSEric Paris int handle_unknown = (ino == SEL_REJECT_UNKNOWN) ? 2023f12070eSEric Paris security_get_reject_unknown() : !security_get_allow_unknown(); 2033f12070eSEric Paris 2043f12070eSEric Paris length = scnprintf(tmpbuf, TMPBUFLEN, "%d", handle_unknown); 2053f12070eSEric Paris return simple_read_from_buffer(buf, count, ppos, tmpbuf, length); 2063f12070eSEric Paris } 2073f12070eSEric Paris 2083f12070eSEric Paris static const struct file_operations sel_handle_unknown_ops = { 2093f12070eSEric Paris .read = sel_read_handle_unknown, 21057a62c23SArnd Bergmann .llseek = generic_file_llseek, 2113f12070eSEric Paris }; 2123f12070eSEric Paris 21311904167SKaiGai Kohei static int sel_open_handle_status(struct inode *inode, struct file *filp) 21411904167SKaiGai Kohei { 21511904167SKaiGai Kohei struct page *status = selinux_kernel_status_page(); 21611904167SKaiGai Kohei 21711904167SKaiGai Kohei if (!status) 21811904167SKaiGai Kohei return -ENOMEM; 21911904167SKaiGai Kohei 22011904167SKaiGai Kohei filp->private_data = status; 22111904167SKaiGai Kohei 22211904167SKaiGai Kohei return 0; 22311904167SKaiGai Kohei } 22411904167SKaiGai Kohei 22511904167SKaiGai Kohei static ssize_t sel_read_handle_status(struct file *filp, char __user *buf, 22611904167SKaiGai Kohei size_t count, loff_t *ppos) 22711904167SKaiGai Kohei { 22811904167SKaiGai Kohei struct page *status = filp->private_data; 22911904167SKaiGai Kohei 23011904167SKaiGai Kohei BUG_ON(!status); 23111904167SKaiGai Kohei 23211904167SKaiGai Kohei return simple_read_from_buffer(buf, count, ppos, 23311904167SKaiGai Kohei page_address(status), 23411904167SKaiGai Kohei sizeof(struct selinux_kernel_status)); 23511904167SKaiGai Kohei } 23611904167SKaiGai Kohei 23711904167SKaiGai Kohei static int sel_mmap_handle_status(struct file *filp, 23811904167SKaiGai Kohei struct vm_area_struct *vma) 23911904167SKaiGai Kohei { 24011904167SKaiGai Kohei struct page *status = filp->private_data; 24111904167SKaiGai Kohei unsigned long size = vma->vm_end - vma->vm_start; 24211904167SKaiGai Kohei 24311904167SKaiGai Kohei BUG_ON(!status); 24411904167SKaiGai Kohei 24511904167SKaiGai Kohei /* only allows one page from the head */ 24611904167SKaiGai Kohei if (vma->vm_pgoff > 0 || size != PAGE_SIZE) 24711904167SKaiGai Kohei return -EIO; 24811904167SKaiGai Kohei /* disallow writable mapping */ 24911904167SKaiGai Kohei if (vma->vm_flags & VM_WRITE) 25011904167SKaiGai Kohei return -EPERM; 25111904167SKaiGai Kohei /* disallow mprotect() turns it into writable */ 25211904167SKaiGai Kohei vma->vm_flags &= ~VM_MAYWRITE; 25311904167SKaiGai Kohei 25411904167SKaiGai Kohei return remap_pfn_range(vma, vma->vm_start, 25511904167SKaiGai Kohei page_to_pfn(status), 25611904167SKaiGai Kohei size, vma->vm_page_prot); 25711904167SKaiGai Kohei } 25811904167SKaiGai Kohei 25911904167SKaiGai Kohei static const struct file_operations sel_handle_status_ops = { 26011904167SKaiGai Kohei .open = sel_open_handle_status, 26111904167SKaiGai Kohei .read = sel_read_handle_status, 26211904167SKaiGai Kohei .mmap = sel_mmap_handle_status, 26311904167SKaiGai Kohei .llseek = generic_file_llseek, 26411904167SKaiGai Kohei }; 26511904167SKaiGai Kohei 2661da177e4SLinus Torvalds #ifdef CONFIG_SECURITY_SELINUX_DISABLE 2671da177e4SLinus Torvalds static ssize_t sel_write_disable(struct file *file, const char __user *buf, 2681da177e4SLinus Torvalds size_t count, loff_t *ppos) 2691da177e4SLinus Torvalds 2701da177e4SLinus Torvalds { 2711da177e4SLinus Torvalds char *page; 2721da177e4SLinus Torvalds ssize_t length; 2731da177e4SLinus Torvalds int new_value; 2741da177e4SLinus Torvalds extern int selinux_disable(void); 2751da177e4SLinus Torvalds 276bfd51626SDavi Arnaut if (count >= PAGE_SIZE) 2771da177e4SLinus Torvalds return -ENOMEM; 2781da177e4SLinus Torvalds if (*ppos != 0) { 2791da177e4SLinus Torvalds /* No partial writes. */ 2801da177e4SLinus Torvalds return -EINVAL; 2811da177e4SLinus Torvalds } 2821da177e4SLinus Torvalds page = (char *)get_zeroed_page(GFP_KERNEL); 2831da177e4SLinus Torvalds if (!page) 2841da177e4SLinus Torvalds return -ENOMEM; 2851da177e4SLinus Torvalds length = -EFAULT; 2861da177e4SLinus Torvalds if (copy_from_user(page, buf, count)) 2871da177e4SLinus Torvalds goto out; 2881da177e4SLinus Torvalds 2891da177e4SLinus Torvalds length = -EINVAL; 2901da177e4SLinus Torvalds if (sscanf(page, "%d", &new_value) != 1) 2911da177e4SLinus Torvalds goto out; 2921da177e4SLinus Torvalds 2931da177e4SLinus Torvalds if (new_value) { 2941da177e4SLinus Torvalds length = selinux_disable(); 2951da177e4SLinus Torvalds if (length < 0) 2961da177e4SLinus Torvalds goto out; 297af601e46SSteve Grubb audit_log(current->audit_context, GFP_KERNEL, AUDIT_MAC_STATUS, 2984746ec5bSEric Paris "selinux=0 auid=%u ses=%u", 2994746ec5bSEric Paris audit_get_loginuid(current), 3004746ec5bSEric Paris audit_get_sessionid(current)); 3011da177e4SLinus Torvalds } 3021da177e4SLinus Torvalds 3031da177e4SLinus Torvalds length = count; 3041da177e4SLinus Torvalds out: 3051da177e4SLinus Torvalds free_page((unsigned long) page); 3061da177e4SLinus Torvalds return length; 3071da177e4SLinus Torvalds } 3081da177e4SLinus Torvalds #else 3091da177e4SLinus Torvalds #define sel_write_disable NULL 3101da177e4SLinus Torvalds #endif 3111da177e4SLinus Torvalds 3129c2e08c5SArjan van de Ven static const struct file_operations sel_disable_ops = { 3131da177e4SLinus Torvalds .write = sel_write_disable, 31457a62c23SArnd Bergmann .llseek = generic_file_llseek, 3151da177e4SLinus Torvalds }; 3161da177e4SLinus Torvalds 3171da177e4SLinus Torvalds static ssize_t sel_read_policyvers(struct file *filp, char __user *buf, 3181da177e4SLinus Torvalds size_t count, loff_t *ppos) 3191da177e4SLinus Torvalds { 3201da177e4SLinus Torvalds char tmpbuf[TMPBUFLEN]; 3211da177e4SLinus Torvalds ssize_t length; 3221da177e4SLinus Torvalds 3231da177e4SLinus Torvalds length = scnprintf(tmpbuf, TMPBUFLEN, "%u", POLICYDB_VERSION_MAX); 3241da177e4SLinus Torvalds return simple_read_from_buffer(buf, count, ppos, tmpbuf, length); 3251da177e4SLinus Torvalds } 3261da177e4SLinus Torvalds 3279c2e08c5SArjan van de Ven static const struct file_operations sel_policyvers_ops = { 3281da177e4SLinus Torvalds .read = sel_read_policyvers, 32957a62c23SArnd Bergmann .llseek = generic_file_llseek, 3301da177e4SLinus Torvalds }; 3311da177e4SLinus Torvalds 3321da177e4SLinus Torvalds /* declaration for sel_write_load */ 3331da177e4SLinus Torvalds static int sel_make_bools(void); 334e47c8fc5SChristopher J. PeBenito static int sel_make_classes(void); 3353bb56b25SPaul Moore static int sel_make_policycap(void); 336e47c8fc5SChristopher J. PeBenito 337e47c8fc5SChristopher J. PeBenito /* declaration for sel_make_class_dirs */ 338e47c8fc5SChristopher J. PeBenito static int sel_make_dir(struct inode *dir, struct dentry *dentry, 339e47c8fc5SChristopher J. PeBenito unsigned long *ino); 3401da177e4SLinus Torvalds 3411da177e4SLinus Torvalds static ssize_t sel_read_mls(struct file *filp, char __user *buf, 3421da177e4SLinus Torvalds size_t count, loff_t *ppos) 3431da177e4SLinus Torvalds { 3441da177e4SLinus Torvalds char tmpbuf[TMPBUFLEN]; 3451da177e4SLinus Torvalds ssize_t length; 3461da177e4SLinus Torvalds 3470719aaf5SGuido Trentalancia length = scnprintf(tmpbuf, TMPBUFLEN, "%d", 3480719aaf5SGuido Trentalancia security_mls_enabled()); 3491da177e4SLinus Torvalds return simple_read_from_buffer(buf, count, ppos, tmpbuf, length); 3501da177e4SLinus Torvalds } 3511da177e4SLinus Torvalds 3529c2e08c5SArjan van de Ven static const struct file_operations sel_mls_ops = { 3531da177e4SLinus Torvalds .read = sel_read_mls, 35457a62c23SArnd Bergmann .llseek = generic_file_llseek, 3551da177e4SLinus Torvalds }; 3561da177e4SLinus Torvalds 357cee74f47SEric Paris struct policy_load_memory { 358cee74f47SEric Paris size_t len; 359cee74f47SEric Paris void *data; 360cee74f47SEric Paris }; 361cee74f47SEric Paris 362cee74f47SEric Paris static int sel_open_policy(struct inode *inode, struct file *filp) 363cee74f47SEric Paris { 364cee74f47SEric Paris struct policy_load_memory *plm = NULL; 365cee74f47SEric Paris int rc; 366cee74f47SEric Paris 367cee74f47SEric Paris BUG_ON(filp->private_data); 368cee74f47SEric Paris 369cee74f47SEric Paris mutex_lock(&sel_mutex); 370cee74f47SEric Paris 371cee74f47SEric Paris rc = task_has_security(current, SECURITY__READ_POLICY); 372cee74f47SEric Paris if (rc) 373cee74f47SEric Paris goto err; 374cee74f47SEric Paris 375cee74f47SEric Paris rc = -EBUSY; 376cee74f47SEric Paris if (policy_opened) 377cee74f47SEric Paris goto err; 378cee74f47SEric Paris 379cee74f47SEric Paris rc = -ENOMEM; 380cee74f47SEric Paris plm = kzalloc(sizeof(*plm), GFP_KERNEL); 381cee74f47SEric Paris if (!plm) 382cee74f47SEric Paris goto err; 383cee74f47SEric Paris 384cee74f47SEric Paris if (i_size_read(inode) != security_policydb_len()) { 385cee74f47SEric Paris mutex_lock(&inode->i_mutex); 386cee74f47SEric Paris i_size_write(inode, security_policydb_len()); 387cee74f47SEric Paris mutex_unlock(&inode->i_mutex); 388cee74f47SEric Paris } 389cee74f47SEric Paris 390cee74f47SEric Paris rc = security_read_policy(&plm->data, &plm->len); 391cee74f47SEric Paris if (rc) 392cee74f47SEric Paris goto err; 393cee74f47SEric Paris 394cee74f47SEric Paris policy_opened = 1; 395cee74f47SEric Paris 396cee74f47SEric Paris filp->private_data = plm; 397cee74f47SEric Paris 398cee74f47SEric Paris mutex_unlock(&sel_mutex); 399cee74f47SEric Paris 400cee74f47SEric Paris return 0; 401cee74f47SEric Paris err: 402cee74f47SEric Paris mutex_unlock(&sel_mutex); 403cee74f47SEric Paris 404cee74f47SEric Paris if (plm) 405cee74f47SEric Paris vfree(plm->data); 406cee74f47SEric Paris kfree(plm); 407cee74f47SEric Paris return rc; 408cee74f47SEric Paris } 409cee74f47SEric Paris 410cee74f47SEric Paris static int sel_release_policy(struct inode *inode, struct file *filp) 411cee74f47SEric Paris { 412cee74f47SEric Paris struct policy_load_memory *plm = filp->private_data; 413cee74f47SEric Paris 414cee74f47SEric Paris BUG_ON(!plm); 415cee74f47SEric Paris 416cee74f47SEric Paris policy_opened = 0; 417cee74f47SEric Paris 418cee74f47SEric Paris vfree(plm->data); 419cee74f47SEric Paris kfree(plm); 420cee74f47SEric Paris 421cee74f47SEric Paris return 0; 422cee74f47SEric Paris } 423cee74f47SEric Paris 424cee74f47SEric Paris static ssize_t sel_read_policy(struct file *filp, char __user *buf, 425cee74f47SEric Paris size_t count, loff_t *ppos) 426cee74f47SEric Paris { 427cee74f47SEric Paris struct policy_load_memory *plm = filp->private_data; 428cee74f47SEric Paris int ret; 429cee74f47SEric Paris 430cee74f47SEric Paris mutex_lock(&sel_mutex); 431cee74f47SEric Paris 432cee74f47SEric Paris ret = task_has_security(current, SECURITY__READ_POLICY); 433cee74f47SEric Paris if (ret) 434cee74f47SEric Paris goto out; 435cee74f47SEric Paris 436cee74f47SEric Paris ret = simple_read_from_buffer(buf, count, ppos, plm->data, plm->len); 437cee74f47SEric Paris out: 438cee74f47SEric Paris mutex_unlock(&sel_mutex); 439cee74f47SEric Paris return ret; 440cee74f47SEric Paris } 441cee74f47SEric Paris 442845ca30fSEric Paris static int sel_mmap_policy_fault(struct vm_area_struct *vma, 443845ca30fSEric Paris struct vm_fault *vmf) 444845ca30fSEric Paris { 445845ca30fSEric Paris struct policy_load_memory *plm = vma->vm_file->private_data; 446845ca30fSEric Paris unsigned long offset; 447845ca30fSEric Paris struct page *page; 448845ca30fSEric Paris 449845ca30fSEric Paris if (vmf->flags & (FAULT_FLAG_MKWRITE | FAULT_FLAG_WRITE)) 450845ca30fSEric Paris return VM_FAULT_SIGBUS; 451845ca30fSEric Paris 452845ca30fSEric Paris offset = vmf->pgoff << PAGE_SHIFT; 453845ca30fSEric Paris if (offset >= roundup(plm->len, PAGE_SIZE)) 454845ca30fSEric Paris return VM_FAULT_SIGBUS; 455845ca30fSEric Paris 456845ca30fSEric Paris page = vmalloc_to_page(plm->data + offset); 457845ca30fSEric Paris get_page(page); 458845ca30fSEric Paris 459845ca30fSEric Paris vmf->page = page; 460845ca30fSEric Paris 461845ca30fSEric Paris return 0; 462845ca30fSEric Paris } 463845ca30fSEric Paris 464845ca30fSEric Paris static struct vm_operations_struct sel_mmap_policy_ops = { 465845ca30fSEric Paris .fault = sel_mmap_policy_fault, 466845ca30fSEric Paris .page_mkwrite = sel_mmap_policy_fault, 467845ca30fSEric Paris }; 468845ca30fSEric Paris 469845ca30fSEric Paris int sel_mmap_policy(struct file *filp, struct vm_area_struct *vma) 470845ca30fSEric Paris { 471845ca30fSEric Paris if (vma->vm_flags & VM_SHARED) { 472845ca30fSEric Paris /* do not allow mprotect to make mapping writable */ 473845ca30fSEric Paris vma->vm_flags &= ~VM_MAYWRITE; 474845ca30fSEric Paris 475845ca30fSEric Paris if (vma->vm_flags & VM_WRITE) 476845ca30fSEric Paris return -EACCES; 477845ca30fSEric Paris } 478845ca30fSEric Paris 479845ca30fSEric Paris vma->vm_flags |= VM_RESERVED; 480845ca30fSEric Paris vma->vm_ops = &sel_mmap_policy_ops; 481845ca30fSEric Paris 482845ca30fSEric Paris return 0; 483845ca30fSEric Paris } 484845ca30fSEric Paris 485cee74f47SEric Paris static const struct file_operations sel_policy_ops = { 486cee74f47SEric Paris .open = sel_open_policy, 487cee74f47SEric Paris .read = sel_read_policy, 488845ca30fSEric Paris .mmap = sel_mmap_policy, 489cee74f47SEric Paris .release = sel_release_policy, 490cee74f47SEric Paris }; 491cee74f47SEric Paris 4921da177e4SLinus Torvalds static ssize_t sel_write_load(struct file *file, const char __user *buf, 4931da177e4SLinus Torvalds size_t count, loff_t *ppos) 4941da177e4SLinus Torvalds 4951da177e4SLinus Torvalds { 4961da177e4SLinus Torvalds int ret; 4971da177e4SLinus Torvalds ssize_t length; 4981da177e4SLinus Torvalds void *data = NULL; 4991da177e4SLinus Torvalds 500bb003079SIngo Molnar mutex_lock(&sel_mutex); 5011da177e4SLinus Torvalds 5021da177e4SLinus Torvalds length = task_has_security(current, SECURITY__LOAD_POLICY); 5031da177e4SLinus Torvalds if (length) 5041da177e4SLinus Torvalds goto out; 5051da177e4SLinus Torvalds 5061da177e4SLinus Torvalds if (*ppos != 0) { 5071da177e4SLinus Torvalds /* No partial writes. */ 5081da177e4SLinus Torvalds length = -EINVAL; 5091da177e4SLinus Torvalds goto out; 5101da177e4SLinus Torvalds } 5111da177e4SLinus Torvalds 512bfd51626SDavi Arnaut if ((count > 64 * 1024 * 1024) 5131da177e4SLinus Torvalds || (data = vmalloc(count)) == NULL) { 5141da177e4SLinus Torvalds length = -ENOMEM; 5151da177e4SLinus Torvalds goto out; 5161da177e4SLinus Torvalds } 5171da177e4SLinus Torvalds 5181da177e4SLinus Torvalds length = -EFAULT; 5191da177e4SLinus Torvalds if (copy_from_user(data, buf, count) != 0) 5201da177e4SLinus Torvalds goto out; 5211da177e4SLinus Torvalds 5221da177e4SLinus Torvalds length = security_load_policy(data, count); 5231da177e4SLinus Torvalds if (length) 5241da177e4SLinus Torvalds goto out; 5251da177e4SLinus Torvalds 5261da177e4SLinus Torvalds ret = sel_make_bools(); 527e47c8fc5SChristopher J. PeBenito if (ret) { 528e47c8fc5SChristopher J. PeBenito length = ret; 529e47c8fc5SChristopher J. PeBenito goto out1; 530e47c8fc5SChristopher J. PeBenito } 531e47c8fc5SChristopher J. PeBenito 532e47c8fc5SChristopher J. PeBenito ret = sel_make_classes(); 5333bb56b25SPaul Moore if (ret) { 5343bb56b25SPaul Moore length = ret; 5353bb56b25SPaul Moore goto out1; 5363bb56b25SPaul Moore } 5373bb56b25SPaul Moore 5383bb56b25SPaul Moore ret = sel_make_policycap(); 5391da177e4SLinus Torvalds if (ret) 5401da177e4SLinus Torvalds length = ret; 5411da177e4SLinus Torvalds else 5421da177e4SLinus Torvalds length = count; 543e47c8fc5SChristopher J. PeBenito 544e47c8fc5SChristopher J. PeBenito out1: 545af601e46SSteve Grubb audit_log(current->audit_context, GFP_KERNEL, AUDIT_MAC_POLICY_LOAD, 5464746ec5bSEric Paris "policy loaded auid=%u ses=%u", 5474746ec5bSEric Paris audit_get_loginuid(current), 5484746ec5bSEric Paris audit_get_sessionid(current)); 5491da177e4SLinus Torvalds out: 550bb003079SIngo Molnar mutex_unlock(&sel_mutex); 5511da177e4SLinus Torvalds vfree(data); 5521da177e4SLinus Torvalds return length; 5531da177e4SLinus Torvalds } 5541da177e4SLinus Torvalds 5559c2e08c5SArjan van de Ven static const struct file_operations sel_load_ops = { 5561da177e4SLinus Torvalds .write = sel_write_load, 55757a62c23SArnd Bergmann .llseek = generic_file_llseek, 5581da177e4SLinus Torvalds }; 5591da177e4SLinus Torvalds 560ce9982d0SStephen Smalley static ssize_t sel_write_context(struct file *file, char *buf, size_t size) 5611da177e4SLinus Torvalds { 562ce9982d0SStephen Smalley char *canon; 563ce9982d0SStephen Smalley u32 sid, len; 5641da177e4SLinus Torvalds ssize_t length; 5651da177e4SLinus Torvalds 5661da177e4SLinus Torvalds length = task_has_security(current, SECURITY__CHECK_CONTEXT); 5671da177e4SLinus Torvalds if (length) 5681da177e4SLinus Torvalds return length; 5691da177e4SLinus Torvalds 570ce9982d0SStephen Smalley length = security_context_to_sid(buf, size, &sid); 5711da177e4SLinus Torvalds if (length < 0) 572ce9982d0SStephen Smalley return length; 5731da177e4SLinus Torvalds 574ce9982d0SStephen Smalley length = security_sid_to_context(sid, &canon, &len); 575ce9982d0SStephen Smalley if (length < 0) 576ce9982d0SStephen Smalley return length; 577ce9982d0SStephen Smalley 578ce9982d0SStephen Smalley if (len > SIMPLE_TRANSACTION_LIMIT) { 579744ba35eSEric Paris printk(KERN_ERR "SELinux: %s: context size (%u) exceeds " 580744ba35eSEric Paris "payload max\n", __func__, len); 581ce9982d0SStephen Smalley length = -ERANGE; 582ce9982d0SStephen Smalley goto out; 583ce9982d0SStephen Smalley } 584ce9982d0SStephen Smalley 585ce9982d0SStephen Smalley memcpy(buf, canon, len); 586ce9982d0SStephen Smalley length = len; 5871da177e4SLinus Torvalds out: 588ce9982d0SStephen Smalley kfree(canon); 5891da177e4SLinus Torvalds return length; 5901da177e4SLinus Torvalds } 5911da177e4SLinus Torvalds 5921da177e4SLinus Torvalds static ssize_t sel_read_checkreqprot(struct file *filp, char __user *buf, 5931da177e4SLinus Torvalds size_t count, loff_t *ppos) 5941da177e4SLinus Torvalds { 5951da177e4SLinus Torvalds char tmpbuf[TMPBUFLEN]; 5961da177e4SLinus Torvalds ssize_t length; 5971da177e4SLinus Torvalds 5981da177e4SLinus Torvalds length = scnprintf(tmpbuf, TMPBUFLEN, "%u", selinux_checkreqprot); 5991da177e4SLinus Torvalds return simple_read_from_buffer(buf, count, ppos, tmpbuf, length); 6001da177e4SLinus Torvalds } 6011da177e4SLinus Torvalds 6021da177e4SLinus Torvalds static ssize_t sel_write_checkreqprot(struct file *file, const char __user *buf, 6031da177e4SLinus Torvalds size_t count, loff_t *ppos) 6041da177e4SLinus Torvalds { 6051da177e4SLinus Torvalds char *page; 6061da177e4SLinus Torvalds ssize_t length; 6071da177e4SLinus Torvalds unsigned int new_value; 6081da177e4SLinus Torvalds 6091da177e4SLinus Torvalds length = task_has_security(current, SECURITY__SETCHECKREQPROT); 6101da177e4SLinus Torvalds if (length) 6111da177e4SLinus Torvalds return length; 6121da177e4SLinus Torvalds 613bfd51626SDavi Arnaut if (count >= PAGE_SIZE) 6141da177e4SLinus Torvalds return -ENOMEM; 6151da177e4SLinus Torvalds if (*ppos != 0) { 6161da177e4SLinus Torvalds /* No partial writes. */ 6171da177e4SLinus Torvalds return -EINVAL; 6181da177e4SLinus Torvalds } 6191da177e4SLinus Torvalds page = (char *)get_zeroed_page(GFP_KERNEL); 6201da177e4SLinus Torvalds if (!page) 6211da177e4SLinus Torvalds return -ENOMEM; 6221da177e4SLinus Torvalds length = -EFAULT; 6231da177e4SLinus Torvalds if (copy_from_user(page, buf, count)) 6241da177e4SLinus Torvalds goto out; 6251da177e4SLinus Torvalds 6261da177e4SLinus Torvalds length = -EINVAL; 6271da177e4SLinus Torvalds if (sscanf(page, "%u", &new_value) != 1) 6281da177e4SLinus Torvalds goto out; 6291da177e4SLinus Torvalds 6301da177e4SLinus Torvalds selinux_checkreqprot = new_value ? 1 : 0; 6311da177e4SLinus Torvalds length = count; 6321da177e4SLinus Torvalds out: 6331da177e4SLinus Torvalds free_page((unsigned long) page); 6341da177e4SLinus Torvalds return length; 6351da177e4SLinus Torvalds } 6369c2e08c5SArjan van de Ven static const struct file_operations sel_checkreqprot_ops = { 6371da177e4SLinus Torvalds .read = sel_read_checkreqprot, 6381da177e4SLinus Torvalds .write = sel_write_checkreqprot, 63957a62c23SArnd Bergmann .llseek = generic_file_llseek, 6401da177e4SLinus Torvalds }; 6411da177e4SLinus Torvalds 6421da177e4SLinus Torvalds /* 6431da177e4SLinus Torvalds * Remaining nodes use transaction based IO methods like nfsd/nfsctl.c 6441da177e4SLinus Torvalds */ 6451da177e4SLinus Torvalds static ssize_t sel_write_access(struct file *file, char *buf, size_t size); 6461da177e4SLinus Torvalds static ssize_t sel_write_create(struct file *file, char *buf, size_t size); 6471da177e4SLinus Torvalds static ssize_t sel_write_relabel(struct file *file, char *buf, size_t size); 6481da177e4SLinus Torvalds static ssize_t sel_write_user(struct file *file, char *buf, size_t size); 6491da177e4SLinus Torvalds static ssize_t sel_write_member(struct file *file, char *buf, size_t size); 6501da177e4SLinus Torvalds 6511da177e4SLinus Torvalds static ssize_t (*write_op[])(struct file *, char *, size_t) = { 6521da177e4SLinus Torvalds [SEL_ACCESS] = sel_write_access, 6531da177e4SLinus Torvalds [SEL_CREATE] = sel_write_create, 6541da177e4SLinus Torvalds [SEL_RELABEL] = sel_write_relabel, 6551da177e4SLinus Torvalds [SEL_USER] = sel_write_user, 6561da177e4SLinus Torvalds [SEL_MEMBER] = sel_write_member, 657ce9982d0SStephen Smalley [SEL_CONTEXT] = sel_write_context, 6581da177e4SLinus Torvalds }; 6591da177e4SLinus Torvalds 6601da177e4SLinus Torvalds static ssize_t selinux_transaction_write(struct file *file, const char __user *buf, size_t size, loff_t *pos) 6611da177e4SLinus Torvalds { 6623d5ff529SJosef Sipek ino_t ino = file->f_path.dentry->d_inode->i_ino; 6631da177e4SLinus Torvalds char *data; 6641da177e4SLinus Torvalds ssize_t rv; 6651da177e4SLinus Torvalds 6666e20a64aSNicolas Kaiser if (ino >= ARRAY_SIZE(write_op) || !write_op[ino]) 6671da177e4SLinus Torvalds return -EINVAL; 6681da177e4SLinus Torvalds 6691da177e4SLinus Torvalds data = simple_transaction_get(file, buf, size); 6701da177e4SLinus Torvalds if (IS_ERR(data)) 6711da177e4SLinus Torvalds return PTR_ERR(data); 6721da177e4SLinus Torvalds 6731da177e4SLinus Torvalds rv = write_op[ino](file, data, size); 6741da177e4SLinus Torvalds if (rv > 0) { 6751da177e4SLinus Torvalds simple_transaction_set(file, rv); 6761da177e4SLinus Torvalds rv = size; 6771da177e4SLinus Torvalds } 6781da177e4SLinus Torvalds return rv; 6791da177e4SLinus Torvalds } 6801da177e4SLinus Torvalds 6819c2e08c5SArjan van de Ven static const struct file_operations transaction_ops = { 6821da177e4SLinus Torvalds .write = selinux_transaction_write, 6831da177e4SLinus Torvalds .read = simple_transaction_read, 6841da177e4SLinus Torvalds .release = simple_transaction_release, 68557a62c23SArnd Bergmann .llseek = generic_file_llseek, 6861da177e4SLinus Torvalds }; 6871da177e4SLinus Torvalds 6881da177e4SLinus Torvalds /* 6891da177e4SLinus Torvalds * payload - write methods 6901da177e4SLinus Torvalds * If the method has a response, the response should be put in buf, 6911da177e4SLinus Torvalds * and the length returned. Otherwise return 0 or and -error. 6921da177e4SLinus Torvalds */ 6931da177e4SLinus Torvalds 6941da177e4SLinus Torvalds static ssize_t sel_write_access(struct file *file, char *buf, size_t size) 6951da177e4SLinus Torvalds { 6961da177e4SLinus Torvalds char *scon, *tcon; 6971da177e4SLinus Torvalds u32 ssid, tsid; 6981da177e4SLinus Torvalds u16 tclass; 6991da177e4SLinus Torvalds struct av_decision avd; 7001da177e4SLinus Torvalds ssize_t length; 7011da177e4SLinus Torvalds 7021da177e4SLinus Torvalds length = task_has_security(current, SECURITY__COMPUTE_AV); 7031da177e4SLinus Torvalds if (length) 7041da177e4SLinus Torvalds return length; 7051da177e4SLinus Torvalds 7061da177e4SLinus Torvalds length = -ENOMEM; 70789d155efSJames Morris scon = kzalloc(size + 1, GFP_KERNEL); 7081da177e4SLinus Torvalds if (!scon) 7091da177e4SLinus Torvalds return length; 7101da177e4SLinus Torvalds 71189d155efSJames Morris tcon = kzalloc(size + 1, GFP_KERNEL); 7121da177e4SLinus Torvalds if (!tcon) 7131da177e4SLinus Torvalds goto out; 7141da177e4SLinus Torvalds 7151da177e4SLinus Torvalds length = -EINVAL; 71619439d05SStephen Smalley if (sscanf(buf, "%s %s %hu", scon, tcon, &tclass) != 3) 7171da177e4SLinus Torvalds goto out2; 7181da177e4SLinus Torvalds 7191da177e4SLinus Torvalds length = security_context_to_sid(scon, strlen(scon) + 1, &ssid); 7201da177e4SLinus Torvalds if (length < 0) 7211da177e4SLinus Torvalds goto out2; 7221da177e4SLinus Torvalds length = security_context_to_sid(tcon, strlen(tcon) + 1, &tsid); 7231da177e4SLinus Torvalds if (length < 0) 7241da177e4SLinus Torvalds goto out2; 7251da177e4SLinus Torvalds 72619439d05SStephen Smalley security_compute_av_user(ssid, tsid, tclass, &avd); 7271da177e4SLinus Torvalds 7281da177e4SLinus Torvalds length = scnprintf(buf, SIMPLE_TRANSACTION_LIMIT, 7298a6f83afSKaiGai Kohei "%x %x %x %x %u %x", 730f1c6381aSEric Paris avd.allowed, 0xffffffff, 7311da177e4SLinus Torvalds avd.auditallow, avd.auditdeny, 7328a6f83afSKaiGai Kohei avd.seqno, avd.flags); 7331da177e4SLinus Torvalds out2: 7341da177e4SLinus Torvalds kfree(tcon); 7351da177e4SLinus Torvalds out: 7361da177e4SLinus Torvalds kfree(scon); 7371da177e4SLinus Torvalds return length; 7381da177e4SLinus Torvalds } 7391da177e4SLinus Torvalds 7401da177e4SLinus Torvalds static ssize_t sel_write_create(struct file *file, char *buf, size_t size) 7411da177e4SLinus Torvalds { 7421da177e4SLinus Torvalds char *scon, *tcon; 7431da177e4SLinus Torvalds u32 ssid, tsid, newsid; 7441da177e4SLinus Torvalds u16 tclass; 7451da177e4SLinus Torvalds ssize_t length; 7461da177e4SLinus Torvalds char *newcon; 7471da177e4SLinus Torvalds u32 len; 7481da177e4SLinus Torvalds 7491da177e4SLinus Torvalds length = task_has_security(current, SECURITY__COMPUTE_CREATE); 7501da177e4SLinus Torvalds if (length) 7511da177e4SLinus Torvalds return length; 7521da177e4SLinus Torvalds 7531da177e4SLinus Torvalds length = -ENOMEM; 75489d155efSJames Morris scon = kzalloc(size + 1, GFP_KERNEL); 7551da177e4SLinus Torvalds if (!scon) 7561da177e4SLinus Torvalds return length; 7571da177e4SLinus Torvalds 75889d155efSJames Morris tcon = kzalloc(size + 1, GFP_KERNEL); 7591da177e4SLinus Torvalds if (!tcon) 7601da177e4SLinus Torvalds goto out; 7611da177e4SLinus Torvalds 7621da177e4SLinus Torvalds length = -EINVAL; 7631da177e4SLinus Torvalds if (sscanf(buf, "%s %s %hu", scon, tcon, &tclass) != 3) 7641da177e4SLinus Torvalds goto out2; 7651da177e4SLinus Torvalds 7661da177e4SLinus Torvalds length = security_context_to_sid(scon, strlen(scon) + 1, &ssid); 7671da177e4SLinus Torvalds if (length < 0) 7681da177e4SLinus Torvalds goto out2; 7691da177e4SLinus Torvalds length = security_context_to_sid(tcon, strlen(tcon) + 1, &tsid); 7701da177e4SLinus Torvalds if (length < 0) 7711da177e4SLinus Torvalds goto out2; 7721da177e4SLinus Torvalds 773c6d3aaa4SStephen Smalley length = security_transition_sid_user(ssid, tsid, tclass, &newsid); 7741da177e4SLinus Torvalds if (length < 0) 7751da177e4SLinus Torvalds goto out2; 7761da177e4SLinus Torvalds 7771da177e4SLinus Torvalds length = security_sid_to_context(newsid, &newcon, &len); 7781da177e4SLinus Torvalds if (length < 0) 7791da177e4SLinus Torvalds goto out2; 7801da177e4SLinus Torvalds 7811da177e4SLinus Torvalds if (len > SIMPLE_TRANSACTION_LIMIT) { 782744ba35eSEric Paris printk(KERN_ERR "SELinux: %s: context size (%u) exceeds " 783744ba35eSEric Paris "payload max\n", __func__, len); 7841da177e4SLinus Torvalds length = -ERANGE; 7851da177e4SLinus Torvalds goto out3; 7861da177e4SLinus Torvalds } 7871da177e4SLinus Torvalds 7881da177e4SLinus Torvalds memcpy(buf, newcon, len); 7891da177e4SLinus Torvalds length = len; 7901da177e4SLinus Torvalds out3: 7911da177e4SLinus Torvalds kfree(newcon); 7921da177e4SLinus Torvalds out2: 7931da177e4SLinus Torvalds kfree(tcon); 7941da177e4SLinus Torvalds out: 7951da177e4SLinus Torvalds kfree(scon); 7961da177e4SLinus Torvalds return length; 7971da177e4SLinus Torvalds } 7981da177e4SLinus Torvalds 7991da177e4SLinus Torvalds static ssize_t sel_write_relabel(struct file *file, char *buf, size_t size) 8001da177e4SLinus Torvalds { 8011da177e4SLinus Torvalds char *scon, *tcon; 8021da177e4SLinus Torvalds u32 ssid, tsid, newsid; 8031da177e4SLinus Torvalds u16 tclass; 8041da177e4SLinus Torvalds ssize_t length; 8051da177e4SLinus Torvalds char *newcon; 8061da177e4SLinus Torvalds u32 len; 8071da177e4SLinus Torvalds 8081da177e4SLinus Torvalds length = task_has_security(current, SECURITY__COMPUTE_RELABEL); 8091da177e4SLinus Torvalds if (length) 8101da177e4SLinus Torvalds return length; 8111da177e4SLinus Torvalds 8121da177e4SLinus Torvalds length = -ENOMEM; 81389d155efSJames Morris scon = kzalloc(size + 1, GFP_KERNEL); 8141da177e4SLinus Torvalds if (!scon) 8151da177e4SLinus Torvalds return length; 8161da177e4SLinus Torvalds 81789d155efSJames Morris tcon = kzalloc(size + 1, GFP_KERNEL); 8181da177e4SLinus Torvalds if (!tcon) 8191da177e4SLinus Torvalds goto out; 8201da177e4SLinus Torvalds 8211da177e4SLinus Torvalds length = -EINVAL; 8221da177e4SLinus Torvalds if (sscanf(buf, "%s %s %hu", scon, tcon, &tclass) != 3) 8231da177e4SLinus Torvalds goto out2; 8241da177e4SLinus Torvalds 8251da177e4SLinus Torvalds length = security_context_to_sid(scon, strlen(scon) + 1, &ssid); 8261da177e4SLinus Torvalds if (length < 0) 8271da177e4SLinus Torvalds goto out2; 8281da177e4SLinus Torvalds length = security_context_to_sid(tcon, strlen(tcon) + 1, &tsid); 8291da177e4SLinus Torvalds if (length < 0) 8301da177e4SLinus Torvalds goto out2; 8311da177e4SLinus Torvalds 8321da177e4SLinus Torvalds length = security_change_sid(ssid, tsid, tclass, &newsid); 8331da177e4SLinus Torvalds if (length < 0) 8341da177e4SLinus Torvalds goto out2; 8351da177e4SLinus Torvalds 8361da177e4SLinus Torvalds length = security_sid_to_context(newsid, &newcon, &len); 8371da177e4SLinus Torvalds if (length < 0) 8381da177e4SLinus Torvalds goto out2; 8391da177e4SLinus Torvalds 8401da177e4SLinus Torvalds if (len > SIMPLE_TRANSACTION_LIMIT) { 8411da177e4SLinus Torvalds length = -ERANGE; 8421da177e4SLinus Torvalds goto out3; 8431da177e4SLinus Torvalds } 8441da177e4SLinus Torvalds 8451da177e4SLinus Torvalds memcpy(buf, newcon, len); 8461da177e4SLinus Torvalds length = len; 8471da177e4SLinus Torvalds out3: 8481da177e4SLinus Torvalds kfree(newcon); 8491da177e4SLinus Torvalds out2: 8501da177e4SLinus Torvalds kfree(tcon); 8511da177e4SLinus Torvalds out: 8521da177e4SLinus Torvalds kfree(scon); 8531da177e4SLinus Torvalds return length; 8541da177e4SLinus Torvalds } 8551da177e4SLinus Torvalds 8561da177e4SLinus Torvalds static ssize_t sel_write_user(struct file *file, char *buf, size_t size) 8571da177e4SLinus Torvalds { 8581da177e4SLinus Torvalds char *con, *user, *ptr; 8591da177e4SLinus Torvalds u32 sid, *sids; 8601da177e4SLinus Torvalds ssize_t length; 8611da177e4SLinus Torvalds char *newcon; 8621da177e4SLinus Torvalds int i, rc; 8631da177e4SLinus Torvalds u32 len, nsids; 8641da177e4SLinus Torvalds 8651da177e4SLinus Torvalds length = task_has_security(current, SECURITY__COMPUTE_USER); 8661da177e4SLinus Torvalds if (length) 8671da177e4SLinus Torvalds return length; 8681da177e4SLinus Torvalds 8691da177e4SLinus Torvalds length = -ENOMEM; 87089d155efSJames Morris con = kzalloc(size + 1, GFP_KERNEL); 8711da177e4SLinus Torvalds if (!con) 8721da177e4SLinus Torvalds return length; 8731da177e4SLinus Torvalds 87489d155efSJames Morris user = kzalloc(size + 1, GFP_KERNEL); 8751da177e4SLinus Torvalds if (!user) 8761da177e4SLinus Torvalds goto out; 8771da177e4SLinus Torvalds 8781da177e4SLinus Torvalds length = -EINVAL; 8791da177e4SLinus Torvalds if (sscanf(buf, "%s %s", con, user) != 2) 8801da177e4SLinus Torvalds goto out2; 8811da177e4SLinus Torvalds 8821da177e4SLinus Torvalds length = security_context_to_sid(con, strlen(con) + 1, &sid); 8831da177e4SLinus Torvalds if (length < 0) 8841da177e4SLinus Torvalds goto out2; 8851da177e4SLinus Torvalds 8861da177e4SLinus Torvalds length = security_get_user_sids(sid, user, &sids, &nsids); 8871da177e4SLinus Torvalds if (length < 0) 8881da177e4SLinus Torvalds goto out2; 8891da177e4SLinus Torvalds 8901da177e4SLinus Torvalds length = sprintf(buf, "%u", nsids) + 1; 8911da177e4SLinus Torvalds ptr = buf + length; 8921da177e4SLinus Torvalds for (i = 0; i < nsids; i++) { 8931da177e4SLinus Torvalds rc = security_sid_to_context(sids[i], &newcon, &len); 8941da177e4SLinus Torvalds if (rc) { 8951da177e4SLinus Torvalds length = rc; 8961da177e4SLinus Torvalds goto out3; 8971da177e4SLinus Torvalds } 8981da177e4SLinus Torvalds if ((length + len) >= SIMPLE_TRANSACTION_LIMIT) { 8991da177e4SLinus Torvalds kfree(newcon); 9001da177e4SLinus Torvalds length = -ERANGE; 9011da177e4SLinus Torvalds goto out3; 9021da177e4SLinus Torvalds } 9031da177e4SLinus Torvalds memcpy(ptr, newcon, len); 9041da177e4SLinus Torvalds kfree(newcon); 9051da177e4SLinus Torvalds ptr += len; 9061da177e4SLinus Torvalds length += len; 9071da177e4SLinus Torvalds } 9081da177e4SLinus Torvalds out3: 9091da177e4SLinus Torvalds kfree(sids); 9101da177e4SLinus Torvalds out2: 9111da177e4SLinus Torvalds kfree(user); 9121da177e4SLinus Torvalds out: 9131da177e4SLinus Torvalds kfree(con); 9141da177e4SLinus Torvalds return length; 9151da177e4SLinus Torvalds } 9161da177e4SLinus Torvalds 9171da177e4SLinus Torvalds static ssize_t sel_write_member(struct file *file, char *buf, size_t size) 9181da177e4SLinus Torvalds { 9191da177e4SLinus Torvalds char *scon, *tcon; 9201da177e4SLinus Torvalds u32 ssid, tsid, newsid; 9211da177e4SLinus Torvalds u16 tclass; 9221da177e4SLinus Torvalds ssize_t length; 9231da177e4SLinus Torvalds char *newcon; 9241da177e4SLinus Torvalds u32 len; 9251da177e4SLinus Torvalds 9261da177e4SLinus Torvalds length = task_has_security(current, SECURITY__COMPUTE_MEMBER); 9271da177e4SLinus Torvalds if (length) 9281da177e4SLinus Torvalds return length; 9291da177e4SLinus Torvalds 9301da177e4SLinus Torvalds length = -ENOMEM; 93189d155efSJames Morris scon = kzalloc(size + 1, GFP_KERNEL); 9321da177e4SLinus Torvalds if (!scon) 9331da177e4SLinus Torvalds return length; 9341da177e4SLinus Torvalds 93589d155efSJames Morris tcon = kzalloc(size + 1, GFP_KERNEL); 9361da177e4SLinus Torvalds if (!tcon) 9371da177e4SLinus Torvalds goto out; 9381da177e4SLinus Torvalds 9391da177e4SLinus Torvalds length = -EINVAL; 9401da177e4SLinus Torvalds if (sscanf(buf, "%s %s %hu", scon, tcon, &tclass) != 3) 9411da177e4SLinus Torvalds goto out2; 9421da177e4SLinus Torvalds 9431da177e4SLinus Torvalds length = security_context_to_sid(scon, strlen(scon) + 1, &ssid); 9441da177e4SLinus Torvalds if (length < 0) 9451da177e4SLinus Torvalds goto out2; 9461da177e4SLinus Torvalds length = security_context_to_sid(tcon, strlen(tcon) + 1, &tsid); 9471da177e4SLinus Torvalds if (length < 0) 9481da177e4SLinus Torvalds goto out2; 9491da177e4SLinus Torvalds 9501da177e4SLinus Torvalds length = security_member_sid(ssid, tsid, tclass, &newsid); 9511da177e4SLinus Torvalds if (length < 0) 9521da177e4SLinus Torvalds goto out2; 9531da177e4SLinus Torvalds 9541da177e4SLinus Torvalds length = security_sid_to_context(newsid, &newcon, &len); 9551da177e4SLinus Torvalds if (length < 0) 9561da177e4SLinus Torvalds goto out2; 9571da177e4SLinus Torvalds 9581da177e4SLinus Torvalds if (len > SIMPLE_TRANSACTION_LIMIT) { 959744ba35eSEric Paris printk(KERN_ERR "SELinux: %s: context size (%u) exceeds " 960744ba35eSEric Paris "payload max\n", __func__, len); 9611da177e4SLinus Torvalds length = -ERANGE; 9621da177e4SLinus Torvalds goto out3; 9631da177e4SLinus Torvalds } 9641da177e4SLinus Torvalds 9651da177e4SLinus Torvalds memcpy(buf, newcon, len); 9661da177e4SLinus Torvalds length = len; 9671da177e4SLinus Torvalds out3: 9681da177e4SLinus Torvalds kfree(newcon); 9691da177e4SLinus Torvalds out2: 9701da177e4SLinus Torvalds kfree(tcon); 9711da177e4SLinus Torvalds out: 9721da177e4SLinus Torvalds kfree(scon); 9731da177e4SLinus Torvalds return length; 9741da177e4SLinus Torvalds } 9751da177e4SLinus Torvalds 9761da177e4SLinus Torvalds static struct inode *sel_make_inode(struct super_block *sb, int mode) 9771da177e4SLinus Torvalds { 9781da177e4SLinus Torvalds struct inode *ret = new_inode(sb); 9791da177e4SLinus Torvalds 9801da177e4SLinus Torvalds if (ret) { 98185fe4025SChristoph Hellwig ret->i_ino = get_next_ino(); 9821da177e4SLinus Torvalds ret->i_mode = mode; 9831da177e4SLinus Torvalds ret->i_atime = ret->i_mtime = ret->i_ctime = CURRENT_TIME; 9841da177e4SLinus Torvalds } 9851da177e4SLinus Torvalds return ret; 9861da177e4SLinus Torvalds } 9871da177e4SLinus Torvalds 9881da177e4SLinus Torvalds static ssize_t sel_read_bool(struct file *filep, char __user *buf, 9891da177e4SLinus Torvalds size_t count, loff_t *ppos) 9901da177e4SLinus Torvalds { 9911da177e4SLinus Torvalds char *page = NULL; 9921da177e4SLinus Torvalds ssize_t length; 9931da177e4SLinus Torvalds ssize_t ret; 9941da177e4SLinus Torvalds int cur_enforcing; 995d313f948SStephen Smalley struct inode *inode = filep->f_path.dentry->d_inode; 996d313f948SStephen Smalley unsigned index = inode->i_ino & SEL_INO_MASK; 997d313f948SStephen Smalley const char *name = filep->f_path.dentry->d_name.name; 9981da177e4SLinus Torvalds 999bb003079SIngo Molnar mutex_lock(&sel_mutex); 10001da177e4SLinus Torvalds 1001d313f948SStephen Smalley if (index >= bool_num || strcmp(name, bool_pending_names[index])) { 1002d313f948SStephen Smalley ret = -EINVAL; 1003d313f948SStephen Smalley goto out; 1004d313f948SStephen Smalley } 10051da177e4SLinus Torvalds 10061872981bSEric Paris page = (char *)get_zeroed_page(GFP_KERNEL); 10071872981bSEric Paris if (!page) { 10081da177e4SLinus Torvalds ret = -ENOMEM; 10091da177e4SLinus Torvalds goto out; 10101da177e4SLinus Torvalds } 10111da177e4SLinus Torvalds 1012d313f948SStephen Smalley cur_enforcing = security_get_bool_value(index); 10131da177e4SLinus Torvalds if (cur_enforcing < 0) { 10141da177e4SLinus Torvalds ret = cur_enforcing; 10151da177e4SLinus Torvalds goto out; 10161da177e4SLinus Torvalds } 10171da177e4SLinus Torvalds length = scnprintf(page, PAGE_SIZE, "%d %d", cur_enforcing, 1018d313f948SStephen Smalley bool_pending_values[index]); 101968bdcf28SStephen Smalley ret = simple_read_from_buffer(buf, count, ppos, page, length); 10201da177e4SLinus Torvalds out: 1021bb003079SIngo Molnar mutex_unlock(&sel_mutex); 10221da177e4SLinus Torvalds if (page) 10231da177e4SLinus Torvalds free_page((unsigned long)page); 10241da177e4SLinus Torvalds return ret; 10251da177e4SLinus Torvalds } 10261da177e4SLinus Torvalds 10271da177e4SLinus Torvalds static ssize_t sel_write_bool(struct file *filep, const char __user *buf, 10281da177e4SLinus Torvalds size_t count, loff_t *ppos) 10291da177e4SLinus Torvalds { 10301da177e4SLinus Torvalds char *page = NULL; 1031d313f948SStephen Smalley ssize_t length; 10321da177e4SLinus Torvalds int new_value; 1033d313f948SStephen Smalley struct inode *inode = filep->f_path.dentry->d_inode; 1034d313f948SStephen Smalley unsigned index = inode->i_ino & SEL_INO_MASK; 1035d313f948SStephen Smalley const char *name = filep->f_path.dentry->d_name.name; 10361da177e4SLinus Torvalds 1037bb003079SIngo Molnar mutex_lock(&sel_mutex); 10381da177e4SLinus Torvalds 10391da177e4SLinus Torvalds length = task_has_security(current, SECURITY__SETBOOL); 10401da177e4SLinus Torvalds if (length) 10411da177e4SLinus Torvalds goto out; 10421da177e4SLinus Torvalds 1043d313f948SStephen Smalley if (index >= bool_num || strcmp(name, bool_pending_names[index])) { 1044d313f948SStephen Smalley length = -EINVAL; 1045d313f948SStephen Smalley goto out; 1046d313f948SStephen Smalley } 1047d313f948SStephen Smalley 1048bfd51626SDavi Arnaut if (count >= PAGE_SIZE) { 10491da177e4SLinus Torvalds length = -ENOMEM; 10501da177e4SLinus Torvalds goto out; 10511da177e4SLinus Torvalds } 1052d313f948SStephen Smalley 10531da177e4SLinus Torvalds if (*ppos != 0) { 10541da177e4SLinus Torvalds /* No partial writes. */ 1055d313f948SStephen Smalley length = -EINVAL; 10561da177e4SLinus Torvalds goto out; 10571da177e4SLinus Torvalds } 10581da177e4SLinus Torvalds page = (char *)get_zeroed_page(GFP_KERNEL); 10591da177e4SLinus Torvalds if (!page) { 10601da177e4SLinus Torvalds length = -ENOMEM; 10611da177e4SLinus Torvalds goto out; 10621da177e4SLinus Torvalds } 10631da177e4SLinus Torvalds 1064d313f948SStephen Smalley length = -EFAULT; 10651da177e4SLinus Torvalds if (copy_from_user(page, buf, count)) 10661da177e4SLinus Torvalds goto out; 10671da177e4SLinus Torvalds 10681da177e4SLinus Torvalds length = -EINVAL; 10691da177e4SLinus Torvalds if (sscanf(page, "%d", &new_value) != 1) 10701da177e4SLinus Torvalds goto out; 10711da177e4SLinus Torvalds 10721da177e4SLinus Torvalds if (new_value) 10731da177e4SLinus Torvalds new_value = 1; 10741da177e4SLinus Torvalds 1075d313f948SStephen Smalley bool_pending_values[index] = new_value; 10761da177e4SLinus Torvalds length = count; 10771da177e4SLinus Torvalds 10781da177e4SLinus Torvalds out: 1079bb003079SIngo Molnar mutex_unlock(&sel_mutex); 10801da177e4SLinus Torvalds if (page) 10811da177e4SLinus Torvalds free_page((unsigned long) page); 10821da177e4SLinus Torvalds return length; 10831da177e4SLinus Torvalds } 10841da177e4SLinus Torvalds 10859c2e08c5SArjan van de Ven static const struct file_operations sel_bool_ops = { 10861da177e4SLinus Torvalds .read = sel_read_bool, 10871da177e4SLinus Torvalds .write = sel_write_bool, 108857a62c23SArnd Bergmann .llseek = generic_file_llseek, 10891da177e4SLinus Torvalds }; 10901da177e4SLinus Torvalds 10911da177e4SLinus Torvalds static ssize_t sel_commit_bools_write(struct file *filep, 10921da177e4SLinus Torvalds const char __user *buf, 10931da177e4SLinus Torvalds size_t count, loff_t *ppos) 10941da177e4SLinus Torvalds { 10951da177e4SLinus Torvalds char *page = NULL; 1096d313f948SStephen Smalley ssize_t length; 10971da177e4SLinus Torvalds int new_value; 10981da177e4SLinus Torvalds 1099bb003079SIngo Molnar mutex_lock(&sel_mutex); 11001da177e4SLinus Torvalds 11011da177e4SLinus Torvalds length = task_has_security(current, SECURITY__SETBOOL); 11021da177e4SLinus Torvalds if (length) 11031da177e4SLinus Torvalds goto out; 11041da177e4SLinus Torvalds 1105bfd51626SDavi Arnaut if (count >= PAGE_SIZE) { 11061da177e4SLinus Torvalds length = -ENOMEM; 11071da177e4SLinus Torvalds goto out; 11081da177e4SLinus Torvalds } 11091da177e4SLinus Torvalds if (*ppos != 0) { 11101da177e4SLinus Torvalds /* No partial writes. */ 11111da177e4SLinus Torvalds goto out; 11121da177e4SLinus Torvalds } 11131da177e4SLinus Torvalds page = (char *)get_zeroed_page(GFP_KERNEL); 11141da177e4SLinus Torvalds if (!page) { 11151da177e4SLinus Torvalds length = -ENOMEM; 11161da177e4SLinus Torvalds goto out; 11171da177e4SLinus Torvalds } 11181da177e4SLinus Torvalds 1119d313f948SStephen Smalley length = -EFAULT; 11201da177e4SLinus Torvalds if (copy_from_user(page, buf, count)) 11211da177e4SLinus Torvalds goto out; 11221da177e4SLinus Torvalds 11231da177e4SLinus Torvalds length = -EINVAL; 11241da177e4SLinus Torvalds if (sscanf(page, "%d", &new_value) != 1) 11251da177e4SLinus Torvalds goto out; 11261da177e4SLinus Torvalds 11271872981bSEric Paris if (new_value && bool_pending_values) 11281da177e4SLinus Torvalds security_set_bools(bool_num, bool_pending_values); 11291da177e4SLinus Torvalds 11301da177e4SLinus Torvalds length = count; 11311da177e4SLinus Torvalds 11321da177e4SLinus Torvalds out: 1133bb003079SIngo Molnar mutex_unlock(&sel_mutex); 11341da177e4SLinus Torvalds if (page) 11351da177e4SLinus Torvalds free_page((unsigned long) page); 11361da177e4SLinus Torvalds return length; 11371da177e4SLinus Torvalds } 11381da177e4SLinus Torvalds 11399c2e08c5SArjan van de Ven static const struct file_operations sel_commit_bools_ops = { 11401da177e4SLinus Torvalds .write = sel_commit_bools_write, 114157a62c23SArnd Bergmann .llseek = generic_file_llseek, 11421da177e4SLinus Torvalds }; 11431da177e4SLinus Torvalds 11440c92d7c7SChristopher J. PeBenito static void sel_remove_entries(struct dentry *de) 11451da177e4SLinus Torvalds { 11460955dc03SStephen Smalley struct list_head *node; 11471da177e4SLinus Torvalds 11481da177e4SLinus Torvalds spin_lock(&dcache_lock); 11492fd6b7f5SNick Piggin spin_lock(&de->d_lock); 11501da177e4SLinus Torvalds node = de->d_subdirs.next; 11511da177e4SLinus Torvalds while (node != &de->d_subdirs) { 11525160ee6fSEric Dumazet struct dentry *d = list_entry(node, struct dentry, d_u.d_child); 11532fd6b7f5SNick Piggin 11542fd6b7f5SNick Piggin spin_lock_nested(&d->d_lock, DENTRY_D_LOCK_NESTED); 11551da177e4SLinus Torvalds list_del_init(node); 11561da177e4SLinus Torvalds 11571da177e4SLinus Torvalds if (d->d_inode) { 11582fd6b7f5SNick Piggin dget_locked_dlock(d); 11592fd6b7f5SNick Piggin spin_unlock(&de->d_lock); 11602fd6b7f5SNick Piggin spin_unlock(&d->d_lock); 11611da177e4SLinus Torvalds spin_unlock(&dcache_lock); 11621da177e4SLinus Torvalds d_delete(d); 11631da177e4SLinus Torvalds simple_unlink(de->d_inode, d); 11641da177e4SLinus Torvalds dput(d); 11651da177e4SLinus Torvalds spin_lock(&dcache_lock); 11662fd6b7f5SNick Piggin spin_lock(&de->d_lock); 11672fd6b7f5SNick Piggin } else 11682fd6b7f5SNick Piggin spin_unlock(&d->d_lock); 11691da177e4SLinus Torvalds node = de->d_subdirs.next; 11701da177e4SLinus Torvalds } 11711da177e4SLinus Torvalds 11722fd6b7f5SNick Piggin spin_unlock(&de->d_lock); 11731da177e4SLinus Torvalds spin_unlock(&dcache_lock); 11741da177e4SLinus Torvalds } 11751da177e4SLinus Torvalds 11761da177e4SLinus Torvalds #define BOOL_DIR_NAME "booleans" 11771da177e4SLinus Torvalds 11781da177e4SLinus Torvalds static int sel_make_bools(void) 11791da177e4SLinus Torvalds { 11801da177e4SLinus Torvalds int i, ret = 0; 11811da177e4SLinus Torvalds ssize_t len; 11821da177e4SLinus Torvalds struct dentry *dentry = NULL; 11831da177e4SLinus Torvalds struct dentry *dir = bool_dir; 11841da177e4SLinus Torvalds struct inode *inode = NULL; 11851da177e4SLinus Torvalds struct inode_security_struct *isec; 11861da177e4SLinus Torvalds char **names = NULL, *page; 11871da177e4SLinus Torvalds int num; 11881da177e4SLinus Torvalds int *values = NULL; 11891da177e4SLinus Torvalds u32 sid; 11901da177e4SLinus Torvalds 11911da177e4SLinus Torvalds /* remove any existing files */ 11928007f102SXiaotian Feng for (i = 0; i < bool_num; i++) 11938007f102SXiaotian Feng kfree(bool_pending_names[i]); 1194d313f948SStephen Smalley kfree(bool_pending_names); 11951da177e4SLinus Torvalds kfree(bool_pending_values); 1196d313f948SStephen Smalley bool_pending_names = NULL; 119720c19e41SDavi Arnaut bool_pending_values = NULL; 11981da177e4SLinus Torvalds 11990c92d7c7SChristopher J. PeBenito sel_remove_entries(dir); 12001da177e4SLinus Torvalds 12011872981bSEric Paris page = (char *)get_zeroed_page(GFP_KERNEL); 12021872981bSEric Paris if (!page) 12031da177e4SLinus Torvalds return -ENOMEM; 12041da177e4SLinus Torvalds 12051da177e4SLinus Torvalds ret = security_get_bools(&num, &names, &values); 12061da177e4SLinus Torvalds if (ret != 0) 12071da177e4SLinus Torvalds goto out; 12081da177e4SLinus Torvalds 12091da177e4SLinus Torvalds for (i = 0; i < num; i++) { 12101da177e4SLinus Torvalds dentry = d_alloc_name(dir, names[i]); 12111da177e4SLinus Torvalds if (!dentry) { 12121da177e4SLinus Torvalds ret = -ENOMEM; 12131da177e4SLinus Torvalds goto err; 12141da177e4SLinus Torvalds } 12151da177e4SLinus Torvalds inode = sel_make_inode(dir->d_sb, S_IFREG | S_IRUGO | S_IWUSR); 12161da177e4SLinus Torvalds if (!inode) { 12171da177e4SLinus Torvalds ret = -ENOMEM; 12181da177e4SLinus Torvalds goto err; 12191da177e4SLinus Torvalds } 12201da177e4SLinus Torvalds 12211da177e4SLinus Torvalds len = snprintf(page, PAGE_SIZE, "/%s/%s", BOOL_DIR_NAME, names[i]); 12221da177e4SLinus Torvalds if (len < 0) { 12231da177e4SLinus Torvalds ret = -EINVAL; 12241da177e4SLinus Torvalds goto err; 12251da177e4SLinus Torvalds } else if (len >= PAGE_SIZE) { 12261da177e4SLinus Torvalds ret = -ENAMETOOLONG; 12271da177e4SLinus Torvalds goto err; 12281da177e4SLinus Torvalds } 12291da177e4SLinus Torvalds isec = (struct inode_security_struct *)inode->i_security; 12301872981bSEric Paris ret = security_genfs_sid("selinuxfs", page, SECCLASS_FILE, &sid); 12311872981bSEric Paris if (ret) 12321da177e4SLinus Torvalds goto err; 12331da177e4SLinus Torvalds isec->sid = sid; 12341da177e4SLinus Torvalds isec->initialized = 1; 12351da177e4SLinus Torvalds inode->i_fop = &sel_bool_ops; 1236bce34bc0SJames Carter inode->i_ino = i|SEL_BOOL_INO_OFFSET; 12371da177e4SLinus Torvalds d_add(dentry, inode); 12381da177e4SLinus Torvalds } 12391da177e4SLinus Torvalds bool_num = num; 1240d313f948SStephen Smalley bool_pending_names = names; 12411da177e4SLinus Torvalds bool_pending_values = values; 12421da177e4SLinus Torvalds out: 12431da177e4SLinus Torvalds free_page((unsigned long)page); 1244d313f948SStephen Smalley return ret; 1245d313f948SStephen Smalley err: 12461da177e4SLinus Torvalds if (names) { 12479a5f04bfSJesper Juhl for (i = 0; i < num; i++) 12481da177e4SLinus Torvalds kfree(names[i]); 12491da177e4SLinus Torvalds kfree(names); 12501da177e4SLinus Torvalds } 125120c19e41SDavi Arnaut kfree(values); 12520c92d7c7SChristopher J. PeBenito sel_remove_entries(dir); 12531da177e4SLinus Torvalds ret = -ENOMEM; 12541da177e4SLinus Torvalds goto out; 12551da177e4SLinus Torvalds } 12561da177e4SLinus Torvalds 12571da177e4SLinus Torvalds #define NULL_FILE_NAME "null" 12581da177e4SLinus Torvalds 12591872981bSEric Paris struct dentry *selinux_null; 12601da177e4SLinus Torvalds 12611da177e4SLinus Torvalds static ssize_t sel_read_avc_cache_threshold(struct file *filp, char __user *buf, 12621da177e4SLinus Torvalds size_t count, loff_t *ppos) 12631da177e4SLinus Torvalds { 12641da177e4SLinus Torvalds char tmpbuf[TMPBUFLEN]; 12651da177e4SLinus Torvalds ssize_t length; 12661da177e4SLinus Torvalds 12671da177e4SLinus Torvalds length = scnprintf(tmpbuf, TMPBUFLEN, "%u", avc_cache_threshold); 12681da177e4SLinus Torvalds return simple_read_from_buffer(buf, count, ppos, tmpbuf, length); 12691da177e4SLinus Torvalds } 12701da177e4SLinus Torvalds 12711da177e4SLinus Torvalds static ssize_t sel_write_avc_cache_threshold(struct file *file, 12721da177e4SLinus Torvalds const char __user *buf, 12731da177e4SLinus Torvalds size_t count, loff_t *ppos) 12741da177e4SLinus Torvalds 12751da177e4SLinus Torvalds { 12761da177e4SLinus Torvalds char *page; 12771da177e4SLinus Torvalds ssize_t ret; 12781da177e4SLinus Torvalds int new_value; 12791da177e4SLinus Torvalds 1280bfd51626SDavi Arnaut if (count >= PAGE_SIZE) { 12811da177e4SLinus Torvalds ret = -ENOMEM; 12821da177e4SLinus Torvalds goto out; 12831da177e4SLinus Torvalds } 12841da177e4SLinus Torvalds 12851da177e4SLinus Torvalds if (*ppos != 0) { 12861da177e4SLinus Torvalds /* No partial writes. */ 12871da177e4SLinus Torvalds ret = -EINVAL; 12881da177e4SLinus Torvalds goto out; 12891da177e4SLinus Torvalds } 12901da177e4SLinus Torvalds 12911da177e4SLinus Torvalds page = (char *)get_zeroed_page(GFP_KERNEL); 12921da177e4SLinus Torvalds if (!page) { 12931da177e4SLinus Torvalds ret = -ENOMEM; 12941da177e4SLinus Torvalds goto out; 12951da177e4SLinus Torvalds } 12961da177e4SLinus Torvalds 12971da177e4SLinus Torvalds if (copy_from_user(page, buf, count)) { 12981da177e4SLinus Torvalds ret = -EFAULT; 12991da177e4SLinus Torvalds goto out_free; 13001da177e4SLinus Torvalds } 13011da177e4SLinus Torvalds 13021da177e4SLinus Torvalds if (sscanf(page, "%u", &new_value) != 1) { 13031da177e4SLinus Torvalds ret = -EINVAL; 13041da177e4SLinus Torvalds goto out; 13051da177e4SLinus Torvalds } 13061da177e4SLinus Torvalds 13071da177e4SLinus Torvalds if (new_value != avc_cache_threshold) { 13081da177e4SLinus Torvalds ret = task_has_security(current, SECURITY__SETSECPARAM); 13091da177e4SLinus Torvalds if (ret) 13101da177e4SLinus Torvalds goto out_free; 13111da177e4SLinus Torvalds avc_cache_threshold = new_value; 13121da177e4SLinus Torvalds } 13131da177e4SLinus Torvalds ret = count; 13141da177e4SLinus Torvalds out_free: 13151da177e4SLinus Torvalds free_page((unsigned long)page); 13161da177e4SLinus Torvalds out: 13171da177e4SLinus Torvalds return ret; 13181da177e4SLinus Torvalds } 13191da177e4SLinus Torvalds 13201da177e4SLinus Torvalds static ssize_t sel_read_avc_hash_stats(struct file *filp, char __user *buf, 13211da177e4SLinus Torvalds size_t count, loff_t *ppos) 13221da177e4SLinus Torvalds { 13231da177e4SLinus Torvalds char *page; 13241da177e4SLinus Torvalds ssize_t ret = 0; 13251da177e4SLinus Torvalds 13261da177e4SLinus Torvalds page = (char *)__get_free_page(GFP_KERNEL); 13271da177e4SLinus Torvalds if (!page) { 13281da177e4SLinus Torvalds ret = -ENOMEM; 13291da177e4SLinus Torvalds goto out; 13301da177e4SLinus Torvalds } 13311da177e4SLinus Torvalds ret = avc_get_hash_stats(page); 13321da177e4SLinus Torvalds if (ret >= 0) 13331da177e4SLinus Torvalds ret = simple_read_from_buffer(buf, count, ppos, page, ret); 13341da177e4SLinus Torvalds free_page((unsigned long)page); 13351da177e4SLinus Torvalds out: 13361da177e4SLinus Torvalds return ret; 13371da177e4SLinus Torvalds } 13381da177e4SLinus Torvalds 13399c2e08c5SArjan van de Ven static const struct file_operations sel_avc_cache_threshold_ops = { 13401da177e4SLinus Torvalds .read = sel_read_avc_cache_threshold, 13411da177e4SLinus Torvalds .write = sel_write_avc_cache_threshold, 134257a62c23SArnd Bergmann .llseek = generic_file_llseek, 13431da177e4SLinus Torvalds }; 13441da177e4SLinus Torvalds 13459c2e08c5SArjan van de Ven static const struct file_operations sel_avc_hash_stats_ops = { 13461da177e4SLinus Torvalds .read = sel_read_avc_hash_stats, 134757a62c23SArnd Bergmann .llseek = generic_file_llseek, 13481da177e4SLinus Torvalds }; 13491da177e4SLinus Torvalds 13501da177e4SLinus Torvalds #ifdef CONFIG_SECURITY_SELINUX_AVC_STATS 13511da177e4SLinus Torvalds static struct avc_cache_stats *sel_avc_get_stat_idx(loff_t *idx) 13521da177e4SLinus Torvalds { 13531da177e4SLinus Torvalds int cpu; 13541da177e4SLinus Torvalds 13554f4b6c1aSRusty Russell for (cpu = *idx; cpu < nr_cpu_ids; ++cpu) { 13561da177e4SLinus Torvalds if (!cpu_possible(cpu)) 13571da177e4SLinus Torvalds continue; 13581da177e4SLinus Torvalds *idx = cpu + 1; 13591da177e4SLinus Torvalds return &per_cpu(avc_cache_stats, cpu); 13601da177e4SLinus Torvalds } 13611da177e4SLinus Torvalds return NULL; 13621da177e4SLinus Torvalds } 13631da177e4SLinus Torvalds 13641da177e4SLinus Torvalds static void *sel_avc_stats_seq_start(struct seq_file *seq, loff_t *pos) 13651da177e4SLinus Torvalds { 13661da177e4SLinus Torvalds loff_t n = *pos - 1; 13671da177e4SLinus Torvalds 13681da177e4SLinus Torvalds if (*pos == 0) 13691da177e4SLinus Torvalds return SEQ_START_TOKEN; 13701da177e4SLinus Torvalds 13711da177e4SLinus Torvalds return sel_avc_get_stat_idx(&n); 13721da177e4SLinus Torvalds } 13731da177e4SLinus Torvalds 13741da177e4SLinus Torvalds static void *sel_avc_stats_seq_next(struct seq_file *seq, void *v, loff_t *pos) 13751da177e4SLinus Torvalds { 13761da177e4SLinus Torvalds return sel_avc_get_stat_idx(pos); 13771da177e4SLinus Torvalds } 13781da177e4SLinus Torvalds 13791da177e4SLinus Torvalds static int sel_avc_stats_seq_show(struct seq_file *seq, void *v) 13801da177e4SLinus Torvalds { 13811da177e4SLinus Torvalds struct avc_cache_stats *st = v; 13821da177e4SLinus Torvalds 13831da177e4SLinus Torvalds if (v == SEQ_START_TOKEN) 13841da177e4SLinus Torvalds seq_printf(seq, "lookups hits misses allocations reclaims " 13851da177e4SLinus Torvalds "frees\n"); 13861da177e4SLinus Torvalds else 13871da177e4SLinus Torvalds seq_printf(seq, "%u %u %u %u %u %u\n", st->lookups, 13881da177e4SLinus Torvalds st->hits, st->misses, st->allocations, 13891da177e4SLinus Torvalds st->reclaims, st->frees); 13901da177e4SLinus Torvalds return 0; 13911da177e4SLinus Torvalds } 13921da177e4SLinus Torvalds 13931da177e4SLinus Torvalds static void sel_avc_stats_seq_stop(struct seq_file *seq, void *v) 13941da177e4SLinus Torvalds { } 13951da177e4SLinus Torvalds 13961996a109SJan Engelhardt static const struct seq_operations sel_avc_cache_stats_seq_ops = { 13971da177e4SLinus Torvalds .start = sel_avc_stats_seq_start, 13981da177e4SLinus Torvalds .next = sel_avc_stats_seq_next, 13991da177e4SLinus Torvalds .show = sel_avc_stats_seq_show, 14001da177e4SLinus Torvalds .stop = sel_avc_stats_seq_stop, 14011da177e4SLinus Torvalds }; 14021da177e4SLinus Torvalds 14031da177e4SLinus Torvalds static int sel_open_avc_cache_stats(struct inode *inode, struct file *file) 14041da177e4SLinus Torvalds { 14051da177e4SLinus Torvalds return seq_open(file, &sel_avc_cache_stats_seq_ops); 14061da177e4SLinus Torvalds } 14071da177e4SLinus Torvalds 14089c2e08c5SArjan van de Ven static const struct file_operations sel_avc_cache_stats_ops = { 14091da177e4SLinus Torvalds .open = sel_open_avc_cache_stats, 14101da177e4SLinus Torvalds .read = seq_read, 14111da177e4SLinus Torvalds .llseek = seq_lseek, 14121da177e4SLinus Torvalds .release = seq_release, 14131da177e4SLinus Torvalds }; 14141da177e4SLinus Torvalds #endif 14151da177e4SLinus Torvalds 14161da177e4SLinus Torvalds static int sel_make_avc_files(struct dentry *dir) 14171da177e4SLinus Torvalds { 14181da177e4SLinus Torvalds int i, ret = 0; 14191da177e4SLinus Torvalds static struct tree_descr files[] = { 14201da177e4SLinus Torvalds { "cache_threshold", 14211da177e4SLinus Torvalds &sel_avc_cache_threshold_ops, S_IRUGO|S_IWUSR }, 14221da177e4SLinus Torvalds { "hash_stats", &sel_avc_hash_stats_ops, S_IRUGO }, 14231da177e4SLinus Torvalds #ifdef CONFIG_SECURITY_SELINUX_AVC_STATS 14241da177e4SLinus Torvalds { "cache_stats", &sel_avc_cache_stats_ops, S_IRUGO }, 14251da177e4SLinus Torvalds #endif 14261da177e4SLinus Torvalds }; 14271da177e4SLinus Torvalds 14286e20a64aSNicolas Kaiser for (i = 0; i < ARRAY_SIZE(files); i++) { 14291da177e4SLinus Torvalds struct inode *inode; 14301da177e4SLinus Torvalds struct dentry *dentry; 14311da177e4SLinus Torvalds 14321da177e4SLinus Torvalds dentry = d_alloc_name(dir, files[i].name); 14331da177e4SLinus Torvalds if (!dentry) { 14341da177e4SLinus Torvalds ret = -ENOMEM; 1435d6aafa65SJames Morris goto out; 14361da177e4SLinus Torvalds } 14371da177e4SLinus Torvalds 14381da177e4SLinus Torvalds inode = sel_make_inode(dir->d_sb, S_IFREG|files[i].mode); 14391da177e4SLinus Torvalds if (!inode) { 14401da177e4SLinus Torvalds ret = -ENOMEM; 1441d6aafa65SJames Morris goto out; 14421da177e4SLinus Torvalds } 14431da177e4SLinus Torvalds inode->i_fop = files[i].ops; 14446174eafcSJames Carter inode->i_ino = ++sel_last_ino; 14451da177e4SLinus Torvalds d_add(dentry, inode); 14461da177e4SLinus Torvalds } 14471da177e4SLinus Torvalds out: 14481da177e4SLinus Torvalds return ret; 14491da177e4SLinus Torvalds } 14501da177e4SLinus Torvalds 1451f0ee2e46SJames Carter static ssize_t sel_read_initcon(struct file *file, char __user *buf, 1452f0ee2e46SJames Carter size_t count, loff_t *ppos) 1453f0ee2e46SJames Carter { 1454f0ee2e46SJames Carter struct inode *inode; 1455f0ee2e46SJames Carter char *con; 1456f0ee2e46SJames Carter u32 sid, len; 1457f0ee2e46SJames Carter ssize_t ret; 1458f0ee2e46SJames Carter 1459f0ee2e46SJames Carter inode = file->f_path.dentry->d_inode; 1460f0ee2e46SJames Carter sid = inode->i_ino&SEL_INO_MASK; 1461f0ee2e46SJames Carter ret = security_sid_to_context(sid, &con, &len); 1462f0ee2e46SJames Carter if (ret < 0) 1463f0ee2e46SJames Carter return ret; 1464f0ee2e46SJames Carter 1465f0ee2e46SJames Carter ret = simple_read_from_buffer(buf, count, ppos, con, len); 1466f0ee2e46SJames Carter kfree(con); 1467f0ee2e46SJames Carter return ret; 1468f0ee2e46SJames Carter } 1469f0ee2e46SJames Carter 1470f0ee2e46SJames Carter static const struct file_operations sel_initcon_ops = { 1471f0ee2e46SJames Carter .read = sel_read_initcon, 147257a62c23SArnd Bergmann .llseek = generic_file_llseek, 1473f0ee2e46SJames Carter }; 1474f0ee2e46SJames Carter 1475f0ee2e46SJames Carter static int sel_make_initcon_files(struct dentry *dir) 1476f0ee2e46SJames Carter { 1477f0ee2e46SJames Carter int i, ret = 0; 1478f0ee2e46SJames Carter 1479f0ee2e46SJames Carter for (i = 1; i <= SECINITSID_NUM; i++) { 1480f0ee2e46SJames Carter struct inode *inode; 1481f0ee2e46SJames Carter struct dentry *dentry; 1482f0ee2e46SJames Carter dentry = d_alloc_name(dir, security_get_initial_sid_context(i)); 1483f0ee2e46SJames Carter if (!dentry) { 1484f0ee2e46SJames Carter ret = -ENOMEM; 1485f0ee2e46SJames Carter goto out; 1486f0ee2e46SJames Carter } 1487f0ee2e46SJames Carter 1488f0ee2e46SJames Carter inode = sel_make_inode(dir->d_sb, S_IFREG|S_IRUGO); 1489f0ee2e46SJames Carter if (!inode) { 1490f0ee2e46SJames Carter ret = -ENOMEM; 1491f0ee2e46SJames Carter goto out; 1492f0ee2e46SJames Carter } 1493f0ee2e46SJames Carter inode->i_fop = &sel_initcon_ops; 1494f0ee2e46SJames Carter inode->i_ino = i|SEL_INITCON_INO_OFFSET; 1495f0ee2e46SJames Carter d_add(dentry, inode); 1496f0ee2e46SJames Carter } 1497f0ee2e46SJames Carter out: 1498f0ee2e46SJames Carter return ret; 1499f0ee2e46SJames Carter } 1500f0ee2e46SJames Carter 1501e47c8fc5SChristopher J. PeBenito static inline unsigned int sel_div(unsigned long a, unsigned long b) 1502e47c8fc5SChristopher J. PeBenito { 1503e47c8fc5SChristopher J. PeBenito return a / b - (a % b < 0); 1504e47c8fc5SChristopher J. PeBenito } 1505e47c8fc5SChristopher J. PeBenito 1506e47c8fc5SChristopher J. PeBenito static inline unsigned long sel_class_to_ino(u16 class) 1507e47c8fc5SChristopher J. PeBenito { 1508e47c8fc5SChristopher J. PeBenito return (class * (SEL_VEC_MAX + 1)) | SEL_CLASS_INO_OFFSET; 1509e47c8fc5SChristopher J. PeBenito } 1510e47c8fc5SChristopher J. PeBenito 1511e47c8fc5SChristopher J. PeBenito static inline u16 sel_ino_to_class(unsigned long ino) 1512e47c8fc5SChristopher J. PeBenito { 1513e47c8fc5SChristopher J. PeBenito return sel_div(ino & SEL_INO_MASK, SEL_VEC_MAX + 1); 1514e47c8fc5SChristopher J. PeBenito } 1515e47c8fc5SChristopher J. PeBenito 1516e47c8fc5SChristopher J. PeBenito static inline unsigned long sel_perm_to_ino(u16 class, u32 perm) 1517e47c8fc5SChristopher J. PeBenito { 1518e47c8fc5SChristopher J. PeBenito return (class * (SEL_VEC_MAX + 1) + perm) | SEL_CLASS_INO_OFFSET; 1519e47c8fc5SChristopher J. PeBenito } 1520e47c8fc5SChristopher J. PeBenito 1521e47c8fc5SChristopher J. PeBenito static inline u32 sel_ino_to_perm(unsigned long ino) 1522e47c8fc5SChristopher J. PeBenito { 1523e47c8fc5SChristopher J. PeBenito return (ino & SEL_INO_MASK) % (SEL_VEC_MAX + 1); 1524e47c8fc5SChristopher J. PeBenito } 1525e47c8fc5SChristopher J. PeBenito 1526e47c8fc5SChristopher J. PeBenito static ssize_t sel_read_class(struct file *file, char __user *buf, 1527e47c8fc5SChristopher J. PeBenito size_t count, loff_t *ppos) 1528e47c8fc5SChristopher J. PeBenito { 1529e47c8fc5SChristopher J. PeBenito ssize_t rc, len; 1530e47c8fc5SChristopher J. PeBenito char *page; 1531e47c8fc5SChristopher J. PeBenito unsigned long ino = file->f_path.dentry->d_inode->i_ino; 1532e47c8fc5SChristopher J. PeBenito 1533e47c8fc5SChristopher J. PeBenito page = (char *)__get_free_page(GFP_KERNEL); 1534e47c8fc5SChristopher J. PeBenito if (!page) { 1535e47c8fc5SChristopher J. PeBenito rc = -ENOMEM; 1536e47c8fc5SChristopher J. PeBenito goto out; 1537e47c8fc5SChristopher J. PeBenito } 1538e47c8fc5SChristopher J. PeBenito 1539e47c8fc5SChristopher J. PeBenito len = snprintf(page, PAGE_SIZE, "%d", sel_ino_to_class(ino)); 1540e47c8fc5SChristopher J. PeBenito rc = simple_read_from_buffer(buf, count, ppos, page, len); 1541e47c8fc5SChristopher J. PeBenito free_page((unsigned long)page); 1542e47c8fc5SChristopher J. PeBenito out: 1543e47c8fc5SChristopher J. PeBenito return rc; 1544e47c8fc5SChristopher J. PeBenito } 1545e47c8fc5SChristopher J. PeBenito 1546e47c8fc5SChristopher J. PeBenito static const struct file_operations sel_class_ops = { 1547e47c8fc5SChristopher J. PeBenito .read = sel_read_class, 154857a62c23SArnd Bergmann .llseek = generic_file_llseek, 1549e47c8fc5SChristopher J. PeBenito }; 1550e47c8fc5SChristopher J. PeBenito 1551e47c8fc5SChristopher J. PeBenito static ssize_t sel_read_perm(struct file *file, char __user *buf, 1552e47c8fc5SChristopher J. PeBenito size_t count, loff_t *ppos) 1553e47c8fc5SChristopher J. PeBenito { 1554e47c8fc5SChristopher J. PeBenito ssize_t rc, len; 1555e47c8fc5SChristopher J. PeBenito char *page; 1556e47c8fc5SChristopher J. PeBenito unsigned long ino = file->f_path.dentry->d_inode->i_ino; 1557e47c8fc5SChristopher J. PeBenito 1558e47c8fc5SChristopher J. PeBenito page = (char *)__get_free_page(GFP_KERNEL); 1559e47c8fc5SChristopher J. PeBenito if (!page) { 1560e47c8fc5SChristopher J. PeBenito rc = -ENOMEM; 1561e47c8fc5SChristopher J. PeBenito goto out; 1562e47c8fc5SChristopher J. PeBenito } 1563e47c8fc5SChristopher J. PeBenito 1564e47c8fc5SChristopher J. PeBenito len = snprintf(page, PAGE_SIZE, "%d", sel_ino_to_perm(ino)); 1565e47c8fc5SChristopher J. PeBenito rc = simple_read_from_buffer(buf, count, ppos, page, len); 1566e47c8fc5SChristopher J. PeBenito free_page((unsigned long)page); 1567e47c8fc5SChristopher J. PeBenito out: 1568e47c8fc5SChristopher J. PeBenito return rc; 1569e47c8fc5SChristopher J. PeBenito } 1570e47c8fc5SChristopher J. PeBenito 1571e47c8fc5SChristopher J. PeBenito static const struct file_operations sel_perm_ops = { 1572e47c8fc5SChristopher J. PeBenito .read = sel_read_perm, 157357a62c23SArnd Bergmann .llseek = generic_file_llseek, 1574e47c8fc5SChristopher J. PeBenito }; 1575e47c8fc5SChristopher J. PeBenito 15763bb56b25SPaul Moore static ssize_t sel_read_policycap(struct file *file, char __user *buf, 15773bb56b25SPaul Moore size_t count, loff_t *ppos) 15783bb56b25SPaul Moore { 15793bb56b25SPaul Moore int value; 15803bb56b25SPaul Moore char tmpbuf[TMPBUFLEN]; 15813bb56b25SPaul Moore ssize_t length; 15823bb56b25SPaul Moore unsigned long i_ino = file->f_path.dentry->d_inode->i_ino; 15833bb56b25SPaul Moore 15843bb56b25SPaul Moore value = security_policycap_supported(i_ino & SEL_INO_MASK); 15853bb56b25SPaul Moore length = scnprintf(tmpbuf, TMPBUFLEN, "%d", value); 15863bb56b25SPaul Moore 15873bb56b25SPaul Moore return simple_read_from_buffer(buf, count, ppos, tmpbuf, length); 15883bb56b25SPaul Moore } 15893bb56b25SPaul Moore 15903bb56b25SPaul Moore static const struct file_operations sel_policycap_ops = { 15913bb56b25SPaul Moore .read = sel_read_policycap, 159257a62c23SArnd Bergmann .llseek = generic_file_llseek, 15933bb56b25SPaul Moore }; 15943bb56b25SPaul Moore 1595e47c8fc5SChristopher J. PeBenito static int sel_make_perm_files(char *objclass, int classvalue, 1596e47c8fc5SChristopher J. PeBenito struct dentry *dir) 1597e47c8fc5SChristopher J. PeBenito { 1598e47c8fc5SChristopher J. PeBenito int i, rc = 0, nperms; 1599e47c8fc5SChristopher J. PeBenito char **perms; 1600e47c8fc5SChristopher J. PeBenito 1601e47c8fc5SChristopher J. PeBenito rc = security_get_permissions(objclass, &perms, &nperms); 1602e47c8fc5SChristopher J. PeBenito if (rc) 1603e47c8fc5SChristopher J. PeBenito goto out; 1604e47c8fc5SChristopher J. PeBenito 1605e47c8fc5SChristopher J. PeBenito for (i = 0; i < nperms; i++) { 1606e47c8fc5SChristopher J. PeBenito struct inode *inode; 1607e47c8fc5SChristopher J. PeBenito struct dentry *dentry; 1608e47c8fc5SChristopher J. PeBenito 1609e47c8fc5SChristopher J. PeBenito dentry = d_alloc_name(dir, perms[i]); 1610e47c8fc5SChristopher J. PeBenito if (!dentry) { 1611e47c8fc5SChristopher J. PeBenito rc = -ENOMEM; 1612e47c8fc5SChristopher J. PeBenito goto out1; 1613e47c8fc5SChristopher J. PeBenito } 1614e47c8fc5SChristopher J. PeBenito 1615e47c8fc5SChristopher J. PeBenito inode = sel_make_inode(dir->d_sb, S_IFREG|S_IRUGO); 1616e47c8fc5SChristopher J. PeBenito if (!inode) { 1617e47c8fc5SChristopher J. PeBenito rc = -ENOMEM; 1618e47c8fc5SChristopher J. PeBenito goto out1; 1619e47c8fc5SChristopher J. PeBenito } 1620e47c8fc5SChristopher J. PeBenito inode->i_fop = &sel_perm_ops; 1621e47c8fc5SChristopher J. PeBenito /* i+1 since perm values are 1-indexed */ 1622e47c8fc5SChristopher J. PeBenito inode->i_ino = sel_perm_to_ino(classvalue, i + 1); 1623e47c8fc5SChristopher J. PeBenito d_add(dentry, inode); 1624e47c8fc5SChristopher J. PeBenito } 1625e47c8fc5SChristopher J. PeBenito 1626e47c8fc5SChristopher J. PeBenito out1: 1627e47c8fc5SChristopher J. PeBenito for (i = 0; i < nperms; i++) 1628e47c8fc5SChristopher J. PeBenito kfree(perms[i]); 1629e47c8fc5SChristopher J. PeBenito kfree(perms); 1630e47c8fc5SChristopher J. PeBenito out: 1631e47c8fc5SChristopher J. PeBenito return rc; 1632e47c8fc5SChristopher J. PeBenito } 1633e47c8fc5SChristopher J. PeBenito 1634e47c8fc5SChristopher J. PeBenito static int sel_make_class_dir_entries(char *classname, int index, 1635e47c8fc5SChristopher J. PeBenito struct dentry *dir) 1636e47c8fc5SChristopher J. PeBenito { 1637e47c8fc5SChristopher J. PeBenito struct dentry *dentry = NULL; 1638e47c8fc5SChristopher J. PeBenito struct inode *inode = NULL; 1639e47c8fc5SChristopher J. PeBenito int rc; 1640e47c8fc5SChristopher J. PeBenito 1641e47c8fc5SChristopher J. PeBenito dentry = d_alloc_name(dir, "index"); 1642e47c8fc5SChristopher J. PeBenito if (!dentry) { 1643e47c8fc5SChristopher J. PeBenito rc = -ENOMEM; 1644e47c8fc5SChristopher J. PeBenito goto out; 1645e47c8fc5SChristopher J. PeBenito } 1646e47c8fc5SChristopher J. PeBenito 1647e47c8fc5SChristopher J. PeBenito inode = sel_make_inode(dir->d_sb, S_IFREG|S_IRUGO); 1648e47c8fc5SChristopher J. PeBenito if (!inode) { 1649e47c8fc5SChristopher J. PeBenito rc = -ENOMEM; 1650e47c8fc5SChristopher J. PeBenito goto out; 1651e47c8fc5SChristopher J. PeBenito } 1652e47c8fc5SChristopher J. PeBenito 1653e47c8fc5SChristopher J. PeBenito inode->i_fop = &sel_class_ops; 1654e47c8fc5SChristopher J. PeBenito inode->i_ino = sel_class_to_ino(index); 1655e47c8fc5SChristopher J. PeBenito d_add(dentry, inode); 1656e47c8fc5SChristopher J. PeBenito 1657e47c8fc5SChristopher J. PeBenito dentry = d_alloc_name(dir, "perms"); 1658e47c8fc5SChristopher J. PeBenito if (!dentry) { 1659e47c8fc5SChristopher J. PeBenito rc = -ENOMEM; 1660e47c8fc5SChristopher J. PeBenito goto out; 1661e47c8fc5SChristopher J. PeBenito } 1662e47c8fc5SChristopher J. PeBenito 1663e47c8fc5SChristopher J. PeBenito rc = sel_make_dir(dir->d_inode, dentry, &last_class_ino); 1664e47c8fc5SChristopher J. PeBenito if (rc) 1665e47c8fc5SChristopher J. PeBenito goto out; 1666e47c8fc5SChristopher J. PeBenito 1667e47c8fc5SChristopher J. PeBenito rc = sel_make_perm_files(classname, index, dentry); 1668e47c8fc5SChristopher J. PeBenito 1669e47c8fc5SChristopher J. PeBenito out: 1670e47c8fc5SChristopher J. PeBenito return rc; 1671e47c8fc5SChristopher J. PeBenito } 1672e47c8fc5SChristopher J. PeBenito 1673e47c8fc5SChristopher J. PeBenito static void sel_remove_classes(void) 1674e47c8fc5SChristopher J. PeBenito { 1675e47c8fc5SChristopher J. PeBenito struct list_head *class_node; 1676e47c8fc5SChristopher J. PeBenito 1677e47c8fc5SChristopher J. PeBenito list_for_each(class_node, &class_dir->d_subdirs) { 1678e47c8fc5SChristopher J. PeBenito struct dentry *class_subdir = list_entry(class_node, 1679e47c8fc5SChristopher J. PeBenito struct dentry, d_u.d_child); 1680e47c8fc5SChristopher J. PeBenito struct list_head *class_subdir_node; 1681e47c8fc5SChristopher J. PeBenito 1682e47c8fc5SChristopher J. PeBenito list_for_each(class_subdir_node, &class_subdir->d_subdirs) { 1683e47c8fc5SChristopher J. PeBenito struct dentry *d = list_entry(class_subdir_node, 1684e47c8fc5SChristopher J. PeBenito struct dentry, d_u.d_child); 1685e47c8fc5SChristopher J. PeBenito 1686e47c8fc5SChristopher J. PeBenito if (d->d_inode) 1687e47c8fc5SChristopher J. PeBenito if (d->d_inode->i_mode & S_IFDIR) 1688e47c8fc5SChristopher J. PeBenito sel_remove_entries(d); 1689e47c8fc5SChristopher J. PeBenito } 1690e47c8fc5SChristopher J. PeBenito 1691e47c8fc5SChristopher J. PeBenito sel_remove_entries(class_subdir); 1692e47c8fc5SChristopher J. PeBenito } 1693e47c8fc5SChristopher J. PeBenito 1694e47c8fc5SChristopher J. PeBenito sel_remove_entries(class_dir); 1695e47c8fc5SChristopher J. PeBenito } 1696e47c8fc5SChristopher J. PeBenito 1697e47c8fc5SChristopher J. PeBenito static int sel_make_classes(void) 1698e47c8fc5SChristopher J. PeBenito { 1699e47c8fc5SChristopher J. PeBenito int rc = 0, nclasses, i; 1700e47c8fc5SChristopher J. PeBenito char **classes; 1701e47c8fc5SChristopher J. PeBenito 1702e47c8fc5SChristopher J. PeBenito /* delete any existing entries */ 1703e47c8fc5SChristopher J. PeBenito sel_remove_classes(); 1704e47c8fc5SChristopher J. PeBenito 1705e47c8fc5SChristopher J. PeBenito rc = security_get_classes(&classes, &nclasses); 1706e47c8fc5SChristopher J. PeBenito if (rc < 0) 1707e47c8fc5SChristopher J. PeBenito goto out; 1708e47c8fc5SChristopher J. PeBenito 1709e47c8fc5SChristopher J. PeBenito /* +2 since classes are 1-indexed */ 1710e47c8fc5SChristopher J. PeBenito last_class_ino = sel_class_to_ino(nclasses + 2); 1711e47c8fc5SChristopher J. PeBenito 1712e47c8fc5SChristopher J. PeBenito for (i = 0; i < nclasses; i++) { 1713e47c8fc5SChristopher J. PeBenito struct dentry *class_name_dir; 1714e47c8fc5SChristopher J. PeBenito 1715e47c8fc5SChristopher J. PeBenito class_name_dir = d_alloc_name(class_dir, classes[i]); 1716e47c8fc5SChristopher J. PeBenito if (!class_name_dir) { 1717e47c8fc5SChristopher J. PeBenito rc = -ENOMEM; 1718e47c8fc5SChristopher J. PeBenito goto out1; 1719e47c8fc5SChristopher J. PeBenito } 1720e47c8fc5SChristopher J. PeBenito 1721e47c8fc5SChristopher J. PeBenito rc = sel_make_dir(class_dir->d_inode, class_name_dir, 1722e47c8fc5SChristopher J. PeBenito &last_class_ino); 1723e47c8fc5SChristopher J. PeBenito if (rc) 1724e47c8fc5SChristopher J. PeBenito goto out1; 1725e47c8fc5SChristopher J. PeBenito 1726e47c8fc5SChristopher J. PeBenito /* i+1 since class values are 1-indexed */ 1727e47c8fc5SChristopher J. PeBenito rc = sel_make_class_dir_entries(classes[i], i + 1, 1728e47c8fc5SChristopher J. PeBenito class_name_dir); 1729e47c8fc5SChristopher J. PeBenito if (rc) 1730e47c8fc5SChristopher J. PeBenito goto out1; 1731e47c8fc5SChristopher J. PeBenito } 1732e47c8fc5SChristopher J. PeBenito 1733e47c8fc5SChristopher J. PeBenito out1: 1734e47c8fc5SChristopher J. PeBenito for (i = 0; i < nclasses; i++) 1735e47c8fc5SChristopher J. PeBenito kfree(classes[i]); 1736e47c8fc5SChristopher J. PeBenito kfree(classes); 1737e47c8fc5SChristopher J. PeBenito out: 1738e47c8fc5SChristopher J. PeBenito return rc; 1739e47c8fc5SChristopher J. PeBenito } 1740e47c8fc5SChristopher J. PeBenito 17413bb56b25SPaul Moore static int sel_make_policycap(void) 17423bb56b25SPaul Moore { 17433bb56b25SPaul Moore unsigned int iter; 17443bb56b25SPaul Moore struct dentry *dentry = NULL; 17453bb56b25SPaul Moore struct inode *inode = NULL; 17463bb56b25SPaul Moore 17473bb56b25SPaul Moore sel_remove_entries(policycap_dir); 17483bb56b25SPaul Moore 17493bb56b25SPaul Moore for (iter = 0; iter <= POLICYDB_CAPABILITY_MAX; iter++) { 17503bb56b25SPaul Moore if (iter < ARRAY_SIZE(policycap_names)) 17513bb56b25SPaul Moore dentry = d_alloc_name(policycap_dir, 17523bb56b25SPaul Moore policycap_names[iter]); 17533bb56b25SPaul Moore else 17543bb56b25SPaul Moore dentry = d_alloc_name(policycap_dir, "unknown"); 17553bb56b25SPaul Moore 17563bb56b25SPaul Moore if (dentry == NULL) 17573bb56b25SPaul Moore return -ENOMEM; 17583bb56b25SPaul Moore 17593bb56b25SPaul Moore inode = sel_make_inode(policycap_dir->d_sb, S_IFREG | S_IRUGO); 17603bb56b25SPaul Moore if (inode == NULL) 17613bb56b25SPaul Moore return -ENOMEM; 17623bb56b25SPaul Moore 17633bb56b25SPaul Moore inode->i_fop = &sel_policycap_ops; 17643bb56b25SPaul Moore inode->i_ino = iter | SEL_POLICYCAP_INO_OFFSET; 17653bb56b25SPaul Moore d_add(dentry, inode); 17663bb56b25SPaul Moore } 17673bb56b25SPaul Moore 17683bb56b25SPaul Moore return 0; 17693bb56b25SPaul Moore } 17703bb56b25SPaul Moore 17710dd4ae51SChristopher J. PeBenito static int sel_make_dir(struct inode *dir, struct dentry *dentry, 17720dd4ae51SChristopher J. PeBenito unsigned long *ino) 17731da177e4SLinus Torvalds { 17741da177e4SLinus Torvalds int ret = 0; 17751da177e4SLinus Torvalds struct inode *inode; 17761da177e4SLinus Torvalds 1777edb20fb5SJames Morris inode = sel_make_inode(dir->i_sb, S_IFDIR | S_IRUGO | S_IXUGO); 17781da177e4SLinus Torvalds if (!inode) { 17791da177e4SLinus Torvalds ret = -ENOMEM; 17801da177e4SLinus Torvalds goto out; 17811da177e4SLinus Torvalds } 17821da177e4SLinus Torvalds inode->i_op = &simple_dir_inode_operations; 17831da177e4SLinus Torvalds inode->i_fop = &simple_dir_operations; 17840dd4ae51SChristopher J. PeBenito inode->i_ino = ++(*ino); 178540e906f8SJames Morris /* directory inodes start off with i_nlink == 2 (for "." entry) */ 1786d8c76e6fSDave Hansen inc_nlink(inode); 17871da177e4SLinus Torvalds d_add(dentry, inode); 1788edb20fb5SJames Morris /* bump link count on parent directory, too */ 1789d8c76e6fSDave Hansen inc_nlink(dir); 17901da177e4SLinus Torvalds out: 17911da177e4SLinus Torvalds return ret; 17921da177e4SLinus Torvalds } 17931da177e4SLinus Torvalds 17941da177e4SLinus Torvalds static int sel_fill_super(struct super_block *sb, void *data, int silent) 17951da177e4SLinus Torvalds { 17961da177e4SLinus Torvalds int ret; 17971da177e4SLinus Torvalds struct dentry *dentry; 1798edb20fb5SJames Morris struct inode *inode, *root_inode; 17991da177e4SLinus Torvalds struct inode_security_struct *isec; 18001da177e4SLinus Torvalds 18011da177e4SLinus Torvalds static struct tree_descr selinux_files[] = { 18021da177e4SLinus Torvalds [SEL_LOAD] = {"load", &sel_load_ops, S_IRUSR|S_IWUSR}, 18031da177e4SLinus Torvalds [SEL_ENFORCE] = {"enforce", &sel_enforce_ops, S_IRUGO|S_IWUSR}, 1804ce9982d0SStephen Smalley [SEL_CONTEXT] = {"context", &transaction_ops, S_IRUGO|S_IWUGO}, 18051da177e4SLinus Torvalds [SEL_ACCESS] = {"access", &transaction_ops, S_IRUGO|S_IWUGO}, 18061da177e4SLinus Torvalds [SEL_CREATE] = {"create", &transaction_ops, S_IRUGO|S_IWUGO}, 18071da177e4SLinus Torvalds [SEL_RELABEL] = {"relabel", &transaction_ops, S_IRUGO|S_IWUGO}, 18081da177e4SLinus Torvalds [SEL_USER] = {"user", &transaction_ops, S_IRUGO|S_IWUGO}, 18091da177e4SLinus Torvalds [SEL_POLICYVERS] = {"policyvers", &sel_policyvers_ops, S_IRUGO}, 18101da177e4SLinus Torvalds [SEL_COMMIT_BOOLS] = {"commit_pending_bools", &sel_commit_bools_ops, S_IWUSR}, 18111da177e4SLinus Torvalds [SEL_MLS] = {"mls", &sel_mls_ops, S_IRUGO}, 18121da177e4SLinus Torvalds [SEL_DISABLE] = {"disable", &sel_disable_ops, S_IWUSR}, 18131da177e4SLinus Torvalds [SEL_MEMBER] = {"member", &transaction_ops, S_IRUGO|S_IWUGO}, 18141da177e4SLinus Torvalds [SEL_CHECKREQPROT] = {"checkreqprot", &sel_checkreqprot_ops, S_IRUGO|S_IWUSR}, 18153f12070eSEric Paris [SEL_REJECT_UNKNOWN] = {"reject_unknown", &sel_handle_unknown_ops, S_IRUGO}, 18163f12070eSEric Paris [SEL_DENY_UNKNOWN] = {"deny_unknown", &sel_handle_unknown_ops, S_IRUGO}, 181711904167SKaiGai Kohei [SEL_STATUS] = {"status", &sel_handle_status_ops, S_IRUGO}, 1818cee74f47SEric Paris [SEL_POLICY] = {"policy", &sel_policy_ops, S_IRUSR}, 18191da177e4SLinus Torvalds /* last one */ {""} 18201da177e4SLinus Torvalds }; 18211da177e4SLinus Torvalds ret = simple_fill_super(sb, SELINUX_MAGIC, selinux_files); 18221da177e4SLinus Torvalds if (ret) 1823161ce45aSJames Morris goto err; 18241da177e4SLinus Torvalds 1825edb20fb5SJames Morris root_inode = sb->s_root->d_inode; 1826edb20fb5SJames Morris 18271da177e4SLinus Torvalds dentry = d_alloc_name(sb->s_root, BOOL_DIR_NAME); 1828161ce45aSJames Morris if (!dentry) { 1829161ce45aSJames Morris ret = -ENOMEM; 1830161ce45aSJames Morris goto err; 1831161ce45aSJames Morris } 18321da177e4SLinus Torvalds 18330dd4ae51SChristopher J. PeBenito ret = sel_make_dir(root_inode, dentry, &sel_last_ino); 1834cde174a8SJames Morris if (ret) 1835161ce45aSJames Morris goto err; 1836cde174a8SJames Morris 18371da177e4SLinus Torvalds bool_dir = dentry; 18381da177e4SLinus Torvalds 18391da177e4SLinus Torvalds dentry = d_alloc_name(sb->s_root, NULL_FILE_NAME); 1840161ce45aSJames Morris if (!dentry) { 1841161ce45aSJames Morris ret = -ENOMEM; 1842161ce45aSJames Morris goto err; 1843161ce45aSJames Morris } 18441da177e4SLinus Torvalds 18451da177e4SLinus Torvalds inode = sel_make_inode(sb, S_IFCHR | S_IRUGO | S_IWUGO); 1846161ce45aSJames Morris if (!inode) { 1847161ce45aSJames Morris ret = -ENOMEM; 1848161ce45aSJames Morris goto err; 1849161ce45aSJames Morris } 18506174eafcSJames Carter inode->i_ino = ++sel_last_ino; 18511da177e4SLinus Torvalds isec = (struct inode_security_struct *)inode->i_security; 18521da177e4SLinus Torvalds isec->sid = SECINITSID_DEVNULL; 18531da177e4SLinus Torvalds isec->sclass = SECCLASS_CHR_FILE; 18541da177e4SLinus Torvalds isec->initialized = 1; 18551da177e4SLinus Torvalds 18561da177e4SLinus Torvalds init_special_inode(inode, S_IFCHR | S_IRUGO | S_IWUGO, MKDEV(MEM_MAJOR, 3)); 18571da177e4SLinus Torvalds d_add(dentry, inode); 18581da177e4SLinus Torvalds selinux_null = dentry; 18591da177e4SLinus Torvalds 18601da177e4SLinus Torvalds dentry = d_alloc_name(sb->s_root, "avc"); 1861161ce45aSJames Morris if (!dentry) { 1862161ce45aSJames Morris ret = -ENOMEM; 1863161ce45aSJames Morris goto err; 1864161ce45aSJames Morris } 18651da177e4SLinus Torvalds 18660dd4ae51SChristopher J. PeBenito ret = sel_make_dir(root_inode, dentry, &sel_last_ino); 18671da177e4SLinus Torvalds if (ret) 1868161ce45aSJames Morris goto err; 18691da177e4SLinus Torvalds 18701da177e4SLinus Torvalds ret = sel_make_avc_files(dentry); 18711da177e4SLinus Torvalds if (ret) 1872161ce45aSJames Morris goto err; 1873f0ee2e46SJames Carter 1874f0ee2e46SJames Carter dentry = d_alloc_name(sb->s_root, "initial_contexts"); 1875f0ee2e46SJames Carter if (!dentry) { 1876f0ee2e46SJames Carter ret = -ENOMEM; 1877f0ee2e46SJames Carter goto err; 1878f0ee2e46SJames Carter } 1879f0ee2e46SJames Carter 18800dd4ae51SChristopher J. PeBenito ret = sel_make_dir(root_inode, dentry, &sel_last_ino); 1881f0ee2e46SJames Carter if (ret) 1882f0ee2e46SJames Carter goto err; 1883f0ee2e46SJames Carter 1884f0ee2e46SJames Carter ret = sel_make_initcon_files(dentry); 1885f0ee2e46SJames Carter if (ret) 1886f0ee2e46SJames Carter goto err; 1887f0ee2e46SJames Carter 1888e47c8fc5SChristopher J. PeBenito dentry = d_alloc_name(sb->s_root, "class"); 1889e47c8fc5SChristopher J. PeBenito if (!dentry) { 1890e47c8fc5SChristopher J. PeBenito ret = -ENOMEM; 1891e47c8fc5SChristopher J. PeBenito goto err; 1892e47c8fc5SChristopher J. PeBenito } 1893e47c8fc5SChristopher J. PeBenito 1894e47c8fc5SChristopher J. PeBenito ret = sel_make_dir(root_inode, dentry, &sel_last_ino); 1895e47c8fc5SChristopher J. PeBenito if (ret) 1896e47c8fc5SChristopher J. PeBenito goto err; 1897e47c8fc5SChristopher J. PeBenito 1898e47c8fc5SChristopher J. PeBenito class_dir = dentry; 1899e47c8fc5SChristopher J. PeBenito 19003bb56b25SPaul Moore dentry = d_alloc_name(sb->s_root, "policy_capabilities"); 19013bb56b25SPaul Moore if (!dentry) { 19023bb56b25SPaul Moore ret = -ENOMEM; 19033bb56b25SPaul Moore goto err; 19043bb56b25SPaul Moore } 19053bb56b25SPaul Moore 19063bb56b25SPaul Moore ret = sel_make_dir(root_inode, dentry, &sel_last_ino); 19073bb56b25SPaul Moore if (ret) 19083bb56b25SPaul Moore goto err; 19093bb56b25SPaul Moore 19103bb56b25SPaul Moore policycap_dir = dentry; 19113bb56b25SPaul Moore 19121da177e4SLinus Torvalds out: 1913161ce45aSJames Morris return ret; 1914161ce45aSJames Morris err: 1915744ba35eSEric Paris printk(KERN_ERR "SELinux: %s: failed while creating inodes\n", 1916744ba35eSEric Paris __func__); 1917161ce45aSJames Morris goto out; 19181da177e4SLinus Torvalds } 19191da177e4SLinus Torvalds 1920fc14f2feSAl Viro static struct dentry *sel_mount(struct file_system_type *fs_type, 1921fc14f2feSAl Viro int flags, const char *dev_name, void *data) 19221da177e4SLinus Torvalds { 1923fc14f2feSAl Viro return mount_single(fs_type, flags, data, sel_fill_super); 19241da177e4SLinus Torvalds } 19251da177e4SLinus Torvalds 19261da177e4SLinus Torvalds static struct file_system_type sel_fs_type = { 19271da177e4SLinus Torvalds .name = "selinuxfs", 1928fc14f2feSAl Viro .mount = sel_mount, 19291da177e4SLinus Torvalds .kill_sb = kill_litter_super, 19301da177e4SLinus Torvalds }; 19311da177e4SLinus Torvalds 19321da177e4SLinus Torvalds struct vfsmount *selinuxfs_mount; 19331da177e4SLinus Torvalds 19341da177e4SLinus Torvalds static int __init init_sel_fs(void) 19351da177e4SLinus Torvalds { 19361da177e4SLinus Torvalds int err; 19371da177e4SLinus Torvalds 19381da177e4SLinus Torvalds if (!selinux_enabled) 19391da177e4SLinus Torvalds return 0; 19401da177e4SLinus Torvalds err = register_filesystem(&sel_fs_type); 19411da177e4SLinus Torvalds if (!err) { 19421da177e4SLinus Torvalds selinuxfs_mount = kern_mount(&sel_fs_type); 19431da177e4SLinus Torvalds if (IS_ERR(selinuxfs_mount)) { 19441da177e4SLinus Torvalds printk(KERN_ERR "selinuxfs: could not mount!\n"); 19451da177e4SLinus Torvalds err = PTR_ERR(selinuxfs_mount); 19461da177e4SLinus Torvalds selinuxfs_mount = NULL; 19471da177e4SLinus Torvalds } 19481da177e4SLinus Torvalds } 19491da177e4SLinus Torvalds return err; 19501da177e4SLinus Torvalds } 19511da177e4SLinus Torvalds 19521da177e4SLinus Torvalds __initcall(init_sel_fs); 19531da177e4SLinus Torvalds 19541da177e4SLinus Torvalds #ifdef CONFIG_SECURITY_SELINUX_DISABLE 19551da177e4SLinus Torvalds void exit_sel_fs(void) 19561da177e4SLinus Torvalds { 19571da177e4SLinus Torvalds unregister_filesystem(&sel_fs_type); 19581da177e4SLinus Torvalds } 19591da177e4SLinus Torvalds #endif 1960